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- // mips.cc -- mips target support for gold.
- // Copyright (C) 2011-2022 Free Software Foundation, Inc.
- // Written by Sasa Stankovic <sasa.stankovic@imgtec.com>
- // and Aleksandar Simeonov <aleksandar.simeonov@rt-rk.com>.
- // This file contains borrowed and adapted code from bfd/elfxx-mips.c.
- // This file is part of gold.
- // This program is free software; you can redistribute it and/or modify
- // it under the terms of the GNU General Public License as published by
- // the Free Software Foundation; either version 3 of the License, or
- // (at your option) any later version.
- // This program is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
- // You should have received a copy of the GNU General Public License
- // along with this program; if not, write to the Free Software
- // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- // MA 02110-1301, USA.
- #include "gold.h"
- #include <algorithm>
- #include <set>
- #include <sstream>
- #include "demangle.h"
- #include "elfcpp.h"
- #include "parameters.h"
- #include "reloc.h"
- #include "mips.h"
- #include "object.h"
- #include "symtab.h"
- #include "layout.h"
- #include "output.h"
- #include "copy-relocs.h"
- #include "target.h"
- #include "target-reloc.h"
- #include "target-select.h"
- #include "tls.h"
- #include "errors.h"
- #include "gc.h"
- #include "attributes.h"
- #include "nacl.h"
- namespace
- {
- using namespace gold;
- template<int size, bool big_endian>
- class Mips_output_data_plt;
- template<int size, bool big_endian>
- class Mips_output_data_got;
- template<int size, bool big_endian>
- class Target_mips;
- template<int size, bool big_endian>
- class Mips_output_section_reginfo;
- template<int size, bool big_endian>
- class Mips_output_section_options;
- template<int size, bool big_endian>
- class Mips_output_data_la25_stub;
- template<int size, bool big_endian>
- class Mips_output_data_mips_stubs;
- template<int size>
- class Mips_symbol;
- template<int size, bool big_endian>
- class Mips_got_info;
- template<int size, bool big_endian>
- class Mips_relobj;
- class Mips16_stub_section_base;
- template<int size, bool big_endian>
- class Mips16_stub_section;
- // The ABI says that every symbol used by dynamic relocations must have
- // a global GOT entry. Among other things, this provides the dynamic
- // linker with a free, directly-indexed cache. The GOT can therefore
- // contain symbols that are not referenced by GOT relocations themselves
- // (in other words, it may have symbols that are not referenced by things
- // like R_MIPS_GOT16 and R_MIPS_GOT_PAGE).
- // GOT relocations are less likely to overflow if we put the associated
- // GOT entries towards the beginning. We therefore divide the global
- // GOT entries into two areas: "normal" and "reloc-only". Entries in
- // the first area can be used for both dynamic relocations and GP-relative
- // accesses, while those in the "reloc-only" area are for dynamic
- // relocations only.
- // These GGA_* ("Global GOT Area") values are organised so that lower
- // values are more general than higher values. Also, non-GGA_NONE
- // values are ordered by the position of the area in the GOT.
- enum Global_got_area
- {
- GGA_NORMAL = 0,
- GGA_RELOC_ONLY = 1,
- GGA_NONE = 2
- };
- // The types of GOT entries needed for this platform.
- // These values are exposed to the ABI in an incremental link.
- // Do not renumber existing values without changing the version
- // number of the .gnu_incremental_inputs section.
- enum Got_type
- {
- GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
- GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
- GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
- // GOT entries for multi-GOT. We support up to 1024 GOTs in multi-GOT links.
- GOT_TYPE_STANDARD_MULTIGOT = 3,
- GOT_TYPE_TLS_OFFSET_MULTIGOT = GOT_TYPE_STANDARD_MULTIGOT + 1024,
- GOT_TYPE_TLS_PAIR_MULTIGOT = GOT_TYPE_TLS_OFFSET_MULTIGOT + 1024
- };
- // TLS type of GOT entry.
- enum Got_tls_type
- {
- GOT_TLS_NONE = 0,
- GOT_TLS_GD = 1,
- GOT_TLS_LDM = 2,
- GOT_TLS_IE = 4
- };
- // Values found in the r_ssym field of a relocation entry.
- enum Special_relocation_symbol
- {
- RSS_UNDEF = 0, // None - value is zero.
- RSS_GP = 1, // Value of GP.
- RSS_GP0 = 2, // Value of GP in object being relocated.
- RSS_LOC = 3 // Address of location being relocated.
- };
- // Whether the section is readonly.
- static inline bool
- is_readonly_section(Output_section* output_section)
- {
- elfcpp::Elf_Xword section_flags = output_section->flags();
- elfcpp::Elf_Word section_type = output_section->type();
- if (section_type == elfcpp::SHT_NOBITS)
- return false;
- if (section_flags & elfcpp::SHF_WRITE)
- return false;
- return true;
- }
- // Return TRUE if a relocation of type R_TYPE from OBJECT might
- // require an la25 stub. See also local_pic_function, which determines
- // whether the destination function ever requires a stub.
- template<int size, bool big_endian>
- static inline bool
- relocation_needs_la25_stub(Mips_relobj<size, big_endian>* object,
- unsigned int r_type, bool target_is_16_bit_code)
- {
- // We specifically ignore branches and jumps from EF_PIC objects,
- // where the onus is on the compiler or programmer to perform any
- // necessary initialization of $25. Sometimes such initialization
- // is unnecessary; for example, -mno-shared functions do not use
- // the incoming value of $25, and may therefore be called directly.
- if (object->is_pic())
- return false;
- switch (r_type)
- {
- case elfcpp::R_MIPS_26:
- case elfcpp::R_MIPS_PC16:
- case elfcpp::R_MIPS_PC21_S2:
- case elfcpp::R_MIPS_PC26_S2:
- case elfcpp::R_MICROMIPS_26_S1:
- case elfcpp::R_MICROMIPS_PC7_S1:
- case elfcpp::R_MICROMIPS_PC10_S1:
- case elfcpp::R_MICROMIPS_PC16_S1:
- case elfcpp::R_MICROMIPS_PC23_S2:
- return true;
- case elfcpp::R_MIPS16_26:
- return !target_is_16_bit_code;
- default:
- return false;
- }
- }
- // Return true if SYM is a locally-defined PIC function, in the sense
- // that it or its fn_stub might need $25 to be valid on entry.
- // Note that MIPS16 functions set up $gp using PC-relative instructions,
- // so they themselves never need $25 to be valid. Only non-MIPS16
- // entry points are of interest here.
- template<int size, bool big_endian>
- static inline bool
- local_pic_function(Mips_symbol<size>* sym)
- {
- bool def_regular = (sym->source() == Symbol::FROM_OBJECT
- && !sym->object()->is_dynamic()
- && !sym->is_undefined());
- if (sym->is_defined() && def_regular)
- {
- Mips_relobj<size, big_endian>* object =
- static_cast<Mips_relobj<size, big_endian>*>(sym->object());
- if ((object->is_pic() || sym->is_pic())
- && (!sym->is_mips16()
- || (sym->has_mips16_fn_stub() && sym->need_fn_stub())))
- return true;
- }
- return false;
- }
- static inline bool
- hi16_reloc(int r_type)
- {
- return (r_type == elfcpp::R_MIPS_HI16
- || r_type == elfcpp::R_MIPS16_HI16
- || r_type == elfcpp::R_MICROMIPS_HI16
- || r_type == elfcpp::R_MIPS_PCHI16);
- }
- static inline bool
- lo16_reloc(int r_type)
- {
- return (r_type == elfcpp::R_MIPS_LO16
- || r_type == elfcpp::R_MIPS16_LO16
- || r_type == elfcpp::R_MICROMIPS_LO16
- || r_type == elfcpp::R_MIPS_PCLO16);
- }
- static inline bool
- got16_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_GOT16
- || r_type == elfcpp::R_MIPS16_GOT16
- || r_type == elfcpp::R_MICROMIPS_GOT16);
- }
- static inline bool
- call_lo16_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_CALL_LO16
- || r_type == elfcpp::R_MICROMIPS_CALL_LO16);
- }
- static inline bool
- got_lo16_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_GOT_LO16
- || r_type == elfcpp::R_MICROMIPS_GOT_LO16);
- }
- static inline bool
- eh_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_EH);
- }
- static inline bool
- got_disp_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_GOT_DISP
- || r_type == elfcpp::R_MICROMIPS_GOT_DISP);
- }
- static inline bool
- got_page_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_GOT_PAGE
- || r_type == elfcpp::R_MICROMIPS_GOT_PAGE);
- }
- static inline bool
- tls_gd_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_TLS_GD
- || r_type == elfcpp::R_MIPS16_TLS_GD
- || r_type == elfcpp::R_MICROMIPS_TLS_GD);
- }
- static inline bool
- tls_gottprel_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_TLS_GOTTPREL
- || r_type == elfcpp::R_MIPS16_TLS_GOTTPREL
- || r_type == elfcpp::R_MICROMIPS_TLS_GOTTPREL);
- }
- static inline bool
- tls_ldm_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_TLS_LDM
- || r_type == elfcpp::R_MIPS16_TLS_LDM
- || r_type == elfcpp::R_MICROMIPS_TLS_LDM);
- }
- static inline bool
- mips16_call_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS16_26
- || r_type == elfcpp::R_MIPS16_CALL16);
- }
- static inline bool
- jal_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MIPS_26
- || r_type == elfcpp::R_MIPS16_26
- || r_type == elfcpp::R_MICROMIPS_26_S1);
- }
- static inline bool
- micromips_branch_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_MICROMIPS_26_S1
- || r_type == elfcpp::R_MICROMIPS_PC16_S1
- || r_type == elfcpp::R_MICROMIPS_PC10_S1
- || r_type == elfcpp::R_MICROMIPS_PC7_S1);
- }
- // Check if R_TYPE is a MIPS16 reloc.
- static inline bool
- mips16_reloc(unsigned int r_type)
- {
- switch (r_type)
- {
- case elfcpp::R_MIPS16_26:
- case elfcpp::R_MIPS16_GPREL:
- case elfcpp::R_MIPS16_GOT16:
- case elfcpp::R_MIPS16_CALL16:
- case elfcpp::R_MIPS16_HI16:
- case elfcpp::R_MIPS16_LO16:
- case elfcpp::R_MIPS16_TLS_GD:
- case elfcpp::R_MIPS16_TLS_LDM:
- case elfcpp::R_MIPS16_TLS_DTPREL_HI16:
- case elfcpp::R_MIPS16_TLS_DTPREL_LO16:
- case elfcpp::R_MIPS16_TLS_GOTTPREL:
- case elfcpp::R_MIPS16_TLS_TPREL_HI16:
- case elfcpp::R_MIPS16_TLS_TPREL_LO16:
- return true;
- default:
- return false;
- }
- }
- // Check if R_TYPE is a microMIPS reloc.
- static inline bool
- micromips_reloc(unsigned int r_type)
- {
- switch (r_type)
- {
- case elfcpp::R_MICROMIPS_26_S1:
- case elfcpp::R_MICROMIPS_HI16:
- case elfcpp::R_MICROMIPS_LO16:
- case elfcpp::R_MICROMIPS_GPREL16:
- case elfcpp::R_MICROMIPS_LITERAL:
- case elfcpp::R_MICROMIPS_GOT16:
- case elfcpp::R_MICROMIPS_PC7_S1:
- case elfcpp::R_MICROMIPS_PC10_S1:
- case elfcpp::R_MICROMIPS_PC16_S1:
- case elfcpp::R_MICROMIPS_CALL16:
- case elfcpp::R_MICROMIPS_GOT_DISP:
- case elfcpp::R_MICROMIPS_GOT_PAGE:
- case elfcpp::R_MICROMIPS_GOT_OFST:
- case elfcpp::R_MICROMIPS_GOT_HI16:
- case elfcpp::R_MICROMIPS_GOT_LO16:
- case elfcpp::R_MICROMIPS_SUB:
- case elfcpp::R_MICROMIPS_HIGHER:
- case elfcpp::R_MICROMIPS_HIGHEST:
- case elfcpp::R_MICROMIPS_CALL_HI16:
- case elfcpp::R_MICROMIPS_CALL_LO16:
- case elfcpp::R_MICROMIPS_SCN_DISP:
- case elfcpp::R_MICROMIPS_JALR:
- case elfcpp::R_MICROMIPS_HI0_LO16:
- case elfcpp::R_MICROMIPS_TLS_GD:
- case elfcpp::R_MICROMIPS_TLS_LDM:
- case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16:
- case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16:
- case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_TPREL_HI16:
- case elfcpp::R_MICROMIPS_TLS_TPREL_LO16:
- case elfcpp::R_MICROMIPS_GPREL7_S2:
- case elfcpp::R_MICROMIPS_PC23_S2:
- return true;
- default:
- return false;
- }
- }
- static inline bool
- is_matching_lo16_reloc(unsigned int high_reloc, unsigned int lo16_reloc)
- {
- switch (high_reloc)
- {
- case elfcpp::R_MIPS_HI16:
- case elfcpp::R_MIPS_GOT16:
- return lo16_reloc == elfcpp::R_MIPS_LO16;
- case elfcpp::R_MIPS_PCHI16:
- return lo16_reloc == elfcpp::R_MIPS_PCLO16;
- case elfcpp::R_MIPS16_HI16:
- case elfcpp::R_MIPS16_GOT16:
- return lo16_reloc == elfcpp::R_MIPS16_LO16;
- case elfcpp::R_MICROMIPS_HI16:
- case elfcpp::R_MICROMIPS_GOT16:
- return lo16_reloc == elfcpp::R_MICROMIPS_LO16;
- default:
- return false;
- }
- }
- // This class is used to hold information about one GOT entry.
- // There are three types of entry:
- //
- // (1) a SYMBOL + OFFSET address, where SYMBOL is local to an input object
- // (object != NULL, symndx >= 0, tls_type != GOT_TLS_LDM)
- // (2) a SYMBOL address, where SYMBOL is not local to an input object
- // (sym != NULL, symndx == -1)
- // (3) a TLS LDM slot (there's only one of these per GOT.)
- // (object != NULL, symndx == 0, tls_type == GOT_TLS_LDM)
- template<int size, bool big_endian>
- class Mips_got_entry
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- public:
- Mips_got_entry(Mips_relobj<size, big_endian>* object, unsigned int symndx,
- Mips_address addend, unsigned char tls_type,
- unsigned int shndx, bool is_section_symbol)
- : addend_(addend), symndx_(symndx), tls_type_(tls_type),
- is_section_symbol_(is_section_symbol), shndx_(shndx)
- { this->d.object = object; }
- Mips_got_entry(Mips_symbol<size>* sym, unsigned char tls_type)
- : addend_(0), symndx_(-1U), tls_type_(tls_type),
- is_section_symbol_(false), shndx_(-1U)
- { this->d.sym = sym; }
- // Return whether this entry is for a local symbol.
- bool
- is_for_local_symbol() const
- { return this->symndx_ != -1U; }
- // Return whether this entry is for a global symbol.
- bool
- is_for_global_symbol() const
- { return this->symndx_ == -1U; }
- // Return the hash of this entry.
- size_t
- hash() const
- {
- if (this->tls_type_ == GOT_TLS_LDM)
- return this->symndx_ + (1 << 18);
- size_t name_hash_value = gold::string_hash<char>(
- (this->symndx_ != -1U)
- ? this->d.object->name().c_str()
- : this->d.sym->name());
- size_t addend = this->addend_;
- return name_hash_value ^ this->symndx_ ^ (addend << 16);
- }
- // Return whether this entry is equal to OTHER.
- bool
- equals(Mips_got_entry<size, big_endian>* other) const
- {
- if (this->symndx_ != other->symndx_
- || this->tls_type_ != other->tls_type_)
- return false;
- if (this->tls_type_ == GOT_TLS_LDM)
- return true;
- return (((this->symndx_ != -1U)
- ? (this->d.object == other->d.object)
- : (this->d.sym == other->d.sym))
- && (this->addend_ == other->addend_));
- }
- // Return input object that needs this GOT entry.
- Mips_relobj<size, big_endian>*
- object() const
- {
- gold_assert(this->symndx_ != -1U);
- return this->d.object;
- }
- // Return local symbol index for local GOT entries.
- unsigned int
- symndx() const
- {
- gold_assert(this->symndx_ != -1U);
- return this->symndx_;
- }
- // Return the relocation addend for local GOT entries.
- Mips_address
- addend() const
- { return this->addend_; }
- // Return global symbol for global GOT entries.
- Mips_symbol<size>*
- sym() const
- {
- gold_assert(this->symndx_ == -1U);
- return this->d.sym;
- }
- // Return whether this is a TLS GOT entry.
- bool
- is_tls_entry() const
- { return this->tls_type_ != GOT_TLS_NONE; }
- // Return TLS type of this GOT entry.
- unsigned char
- tls_type() const
- { return this->tls_type_; }
- // Return section index of the local symbol for local GOT entries.
- unsigned int
- shndx() const
- { return this->shndx_; }
- // Return whether this is a STT_SECTION symbol.
- bool
- is_section_symbol() const
- { return this->is_section_symbol_; }
- private:
- // The addend.
- Mips_address addend_;
- // The index of the symbol if we have a local symbol; -1 otherwise.
- unsigned int symndx_;
- union
- {
- // The input object for local symbols that needs the GOT entry.
- Mips_relobj<size, big_endian>* object;
- // If symndx == -1, the global symbol corresponding to this GOT entry. The
- // symbol's entry is in the local area if mips_sym->global_got_area is
- // GGA_NONE, otherwise it is in the global area.
- Mips_symbol<size>* sym;
- } d;
- // The TLS type of this GOT entry. An LDM GOT entry will be a local
- // symbol entry with r_symndx == 0.
- unsigned char tls_type_;
- // Whether this is a STT_SECTION symbol.
- bool is_section_symbol_;
- // For local GOT entries, section index of the local symbol.
- unsigned int shndx_;
- };
- // Hash for Mips_got_entry.
- template<int size, bool big_endian>
- class Mips_got_entry_hash
- {
- public:
- size_t
- operator()(Mips_got_entry<size, big_endian>* entry) const
- { return entry->hash(); }
- };
- // Equality for Mips_got_entry.
- template<int size, bool big_endian>
- class Mips_got_entry_eq
- {
- public:
- bool
- operator()(Mips_got_entry<size, big_endian>* e1,
- Mips_got_entry<size, big_endian>* e2) const
- { return e1->equals(e2); }
- };
- // Hash for Mips_symbol.
- template<int size>
- class Mips_symbol_hash
- {
- public:
- size_t
- operator()(Mips_symbol<size>* sym) const
- { return sym->hash(); }
- };
- // Got_page_range. This class describes a range of addends: [MIN_ADDEND,
- // MAX_ADDEND]. The instances form a non-overlapping list that is sorted by
- // increasing MIN_ADDEND.
- struct Got_page_range
- {
- Got_page_range()
- : next(NULL), min_addend(0), max_addend(0)
- { }
- Got_page_range* next;
- int min_addend;
- int max_addend;
- // Return the maximum number of GOT page entries required.
- int
- get_max_pages()
- { return (this->max_addend - this->min_addend + 0x1ffff) >> 16; }
- };
- // Got_page_entry. This class describes the range of addends that are applied
- // to page relocations against a given symbol.
- struct Got_page_entry
- {
- Got_page_entry()
- : object(NULL), symndx(-1U), ranges(NULL)
- { }
- Got_page_entry(Object* object_, unsigned int symndx_)
- : object(object_), symndx(symndx_), ranges(NULL)
- { }
- // The input object that needs the GOT page entry.
- Object* object;
- // The index of the symbol, as stored in the relocation r_info.
- unsigned int symndx;
- // The ranges for this page entry.
- Got_page_range* ranges;
- };
- // Hash for Got_page_entry.
- struct Got_page_entry_hash
- {
- size_t
- operator()(Got_page_entry* entry) const
- { return reinterpret_cast<uintptr_t>(entry->object) + entry->symndx; }
- };
- // Equality for Got_page_entry.
- struct Got_page_entry_eq
- {
- bool
- operator()(Got_page_entry* entry1, Got_page_entry* entry2) const
- {
- return entry1->object == entry2->object && entry1->symndx == entry2->symndx;
- }
- };
- // This class is used to hold .got information when linking.
- template<int size, bool big_endian>
- class Mips_got_info
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian>
- Reloc_section;
- typedef Unordered_map<unsigned int, unsigned int> Got_page_offsets;
- // Unordered set of GOT entries.
- typedef Unordered_set<Mips_got_entry<size, big_endian>*,
- Mips_got_entry_hash<size, big_endian>,
- Mips_got_entry_eq<size, big_endian> > Got_entry_set;
- // Unordered set of GOT page entries.
- typedef Unordered_set<Got_page_entry*,
- Got_page_entry_hash, Got_page_entry_eq> Got_page_entry_set;
- // Unordered set of global GOT entries.
- typedef Unordered_set<Mips_symbol<size>*, Mips_symbol_hash<size> >
- Global_got_entry_set;
- public:
- Mips_got_info()
- : local_gotno_(0), page_gotno_(0), global_gotno_(0), reloc_only_gotno_(0),
- tls_gotno_(0), tls_ldm_offset_(-1U), global_got_symbols_(),
- got_entries_(), got_page_entries_(), got_page_offset_start_(0),
- got_page_offset_next_(0), got_page_offsets_(), next_(NULL), index_(-1U),
- offset_(0)
- { }
- // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
- // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
- void
- record_local_got_symbol(Mips_relobj<size, big_endian>* object,
- unsigned int symndx, Mips_address addend,
- unsigned int r_type, unsigned int shndx,
- bool is_section_symbol);
- // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
- // in OBJECT. FOR_CALL is true if the caller is only interested in
- // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
- // relocation.
- void
- record_global_got_symbol(Mips_symbol<size>* mips_sym,
- Mips_relobj<size, big_endian>* object,
- unsigned int r_type, bool dyn_reloc, bool for_call);
- // Add ENTRY to master GOT and to OBJECT's GOT.
- void
- record_got_entry(Mips_got_entry<size, big_endian>* entry,
- Mips_relobj<size, big_endian>* object);
- // Record that OBJECT has a page relocation against symbol SYMNDX and
- // that ADDEND is the addend for that relocation.
- void
- record_got_page_entry(Mips_relobj<size, big_endian>* object,
- unsigned int symndx, int addend);
- // Create all entries that should be in the local part of the GOT.
- void
- add_local_entries(Target_mips<size, big_endian>* target, Layout* layout);
- // Create GOT page entries.
- void
- add_page_entries(Target_mips<size, big_endian>* target, Layout* layout);
- // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY.
- void
- add_global_entries(Target_mips<size, big_endian>* target, Layout* layout,
- unsigned int non_reloc_only_global_gotno);
- // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
- void
- add_reloc_only_entries(Mips_output_data_got<size, big_endian>* got);
- // Create TLS GOT entries.
- void
- add_tls_entries(Target_mips<size, big_endian>* target, Layout* layout);
- // Decide whether the symbol needs an entry in the global part of the primary
- // GOT, setting global_got_area accordingly. Count the number of global
- // symbols that are in the primary GOT only because they have dynamic
- // relocations R_MIPS_REL32 against them (reloc_only_gotno).
- void
- count_got_symbols(Symbol_table* symtab);
- // Return the offset of GOT page entry for VALUE.
- unsigned int
- get_got_page_offset(Mips_address value,
- Mips_output_data_got<size, big_endian>* got);
- // Count the number of GOT entries required.
- void
- count_got_entries();
- // Count the number of GOT entries required by ENTRY. Accumulate the result.
- void
- count_got_entry(Mips_got_entry<size, big_endian>* entry);
- // Add FROM's GOT entries.
- void
- add_got_entries(Mips_got_info<size, big_endian>* from);
- // Add FROM's GOT page entries.
- void
- add_got_page_count(Mips_got_info<size, big_endian>* from);
- // Return GOT size.
- unsigned int
- got_size() const
- { return ((2 + this->local_gotno_ + this->page_gotno_ + this->global_gotno_
- + this->tls_gotno_) * size/8);
- }
- // Return the number of local GOT entries.
- unsigned int
- local_gotno() const
- { return this->local_gotno_; }
- // Return the maximum number of page GOT entries needed.
- unsigned int
- page_gotno() const
- { return this->page_gotno_; }
- // Return the number of global GOT entries.
- unsigned int
- global_gotno() const
- { return this->global_gotno_; }
- // Set the number of global GOT entries.
- void
- set_global_gotno(unsigned int global_gotno)
- { this->global_gotno_ = global_gotno; }
- // Return the number of GGA_RELOC_ONLY global GOT entries.
- unsigned int
- reloc_only_gotno() const
- { return this->reloc_only_gotno_; }
- // Return the number of TLS GOT entries.
- unsigned int
- tls_gotno() const
- { return this->tls_gotno_; }
- // Return the GOT type for this GOT. Used for multi-GOT links only.
- unsigned int
- multigot_got_type(unsigned int got_type) const
- {
- switch (got_type)
- {
- case GOT_TYPE_STANDARD:
- return GOT_TYPE_STANDARD_MULTIGOT + this->index_;
- case GOT_TYPE_TLS_OFFSET:
- return GOT_TYPE_TLS_OFFSET_MULTIGOT + this->index_;
- case GOT_TYPE_TLS_PAIR:
- return GOT_TYPE_TLS_PAIR_MULTIGOT + this->index_;
- default:
- gold_unreachable();
- }
- }
- // Remove lazy-binding stubs for global symbols in this GOT.
- void
- remove_lazy_stubs(Target_mips<size, big_endian>* target);
- // Return offset of this GOT from the start of .got section.
- unsigned int
- offset() const
- { return this->offset_; }
- // Set offset of this GOT from the start of .got section.
- void
- set_offset(unsigned int offset)
- { this->offset_ = offset; }
- // Set index of this GOT in multi-GOT links.
- void
- set_index(unsigned int index)
- { this->index_ = index; }
- // Return next GOT in multi-GOT links.
- Mips_got_info<size, big_endian>*
- next() const
- { return this->next_; }
- // Set next GOT in multi-GOT links.
- void
- set_next(Mips_got_info<size, big_endian>* next)
- { this->next_ = next; }
- // Return the offset of TLS LDM entry for this GOT.
- unsigned int
- tls_ldm_offset() const
- { return this->tls_ldm_offset_; }
- // Set the offset of TLS LDM entry for this GOT.
- void
- set_tls_ldm_offset(unsigned int tls_ldm_offset)
- { this->tls_ldm_offset_ = tls_ldm_offset; }
- Global_got_entry_set&
- global_got_symbols()
- { return this->global_got_symbols_; }
- // Return the GOT_TLS_* type required by relocation type R_TYPE.
- static int
- mips_elf_reloc_tls_type(unsigned int r_type)
- {
- if (tls_gd_reloc(r_type))
- return GOT_TLS_GD;
- if (tls_ldm_reloc(r_type))
- return GOT_TLS_LDM;
- if (tls_gottprel_reloc(r_type))
- return GOT_TLS_IE;
- return GOT_TLS_NONE;
- }
- // Return the number of GOT slots needed for GOT TLS type TYPE.
- static int
- mips_tls_got_entries(unsigned int type)
- {
- switch (type)
- {
- case GOT_TLS_GD:
- case GOT_TLS_LDM:
- return 2;
- case GOT_TLS_IE:
- return 1;
- case GOT_TLS_NONE:
- return 0;
- default:
- gold_unreachable();
- }
- }
- private:
- // The number of local GOT entries.
- unsigned int local_gotno_;
- // The maximum number of page GOT entries needed.
- unsigned int page_gotno_;
- // The number of global GOT entries.
- unsigned int global_gotno_;
- // The number of global GOT entries that are in the GGA_RELOC_ONLY area.
- unsigned int reloc_only_gotno_;
- // The number of TLS GOT entries.
- unsigned int tls_gotno_;
- // The offset of TLS LDM entry for this GOT.
- unsigned int tls_ldm_offset_;
- // All symbols that have global GOT entry.
- Global_got_entry_set global_got_symbols_;
- // A hash table holding GOT entries.
- Got_entry_set got_entries_;
- // A hash table of GOT page entries (only used in master GOT).
- Got_page_entry_set got_page_entries_;
- // The offset of first GOT page entry for this GOT.
- unsigned int got_page_offset_start_;
- // The offset of next available GOT page entry for this GOT.
- unsigned int got_page_offset_next_;
- // A hash table that maps GOT page entry value to the GOT offset where
- // the entry is located.
- Got_page_offsets got_page_offsets_;
- // In multi-GOT links, a pointer to the next GOT.
- Mips_got_info<size, big_endian>* next_;
- // Index of this GOT in multi-GOT links.
- unsigned int index_;
- // The offset of this GOT in multi-GOT links.
- unsigned int offset_;
- };
- // This is a helper class used during relocation scan. It records GOT16 addend.
- template<int size, bool big_endian>
- struct got16_addend
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- got16_addend(const Sized_relobj_file<size, big_endian>* _object,
- unsigned int _shndx, unsigned int _r_type, unsigned int _r_sym,
- Mips_address _addend)
- : object(_object), shndx(_shndx), r_type(_r_type), r_sym(_r_sym),
- addend(_addend)
- { }
- const Sized_relobj_file<size, big_endian>* object;
- unsigned int shndx;
- unsigned int r_type;
- unsigned int r_sym;
- Mips_address addend;
- };
- // .MIPS.abiflags section content
- template<bool big_endian>
- struct Mips_abiflags
- {
- typedef typename elfcpp::Swap<8, big_endian>::Valtype Valtype8;
- typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype16;
- typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32;
- Mips_abiflags()
- : version(0), isa_level(0), isa_rev(0), gpr_size(0), cpr1_size(0),
- cpr2_size(0), fp_abi(0), isa_ext(0), ases(0), flags1(0), flags2(0)
- { }
- // Version of flags structure.
- Valtype16 version;
- // The level of the ISA: 1-5, 32, 64.
- Valtype8 isa_level;
- // The revision of ISA: 0 for MIPS V and below, 1-n otherwise.
- Valtype8 isa_rev;
- // The size of general purpose registers.
- Valtype8 gpr_size;
- // The size of co-processor 1 registers.
- Valtype8 cpr1_size;
- // The size of co-processor 2 registers.
- Valtype8 cpr2_size;
- // The floating-point ABI.
- Valtype8 fp_abi;
- // Processor-specific extension.
- Valtype32 isa_ext;
- // Mask of ASEs used.
- Valtype32 ases;
- // Mask of general flags.
- Valtype32 flags1;
- Valtype32 flags2;
- };
- // Mips_symbol class. Holds additional symbol information needed for Mips.
- template<int size>
- class Mips_symbol : public Sized_symbol<size>
- {
- public:
- Mips_symbol()
- : need_fn_stub_(false), has_nonpic_branches_(false), la25_stub_offset_(-1U),
- has_static_relocs_(false), no_lazy_stub_(false), lazy_stub_offset_(0),
- pointer_equality_needed_(false), global_got_area_(GGA_NONE),
- global_gotoffset_(-1U), got_only_for_calls_(true), has_lazy_stub_(false),
- needs_mips_plt_(false), needs_comp_plt_(false), mips_plt_offset_(-1U),
- comp_plt_offset_(-1U), mips16_fn_stub_(NULL), mips16_call_stub_(NULL),
- mips16_call_fp_stub_(NULL), applied_secondary_got_fixup_(false)
- { }
- // Return whether this is a MIPS16 symbol.
- bool
- is_mips16() const
- {
- // (st_other & STO_MIPS16) == STO_MIPS16
- return ((this->nonvis() & (elfcpp::STO_MIPS16 >> 2))
- == elfcpp::STO_MIPS16 >> 2);
- }
- // Return whether this is a microMIPS symbol.
- bool
- is_micromips() const
- {
- // (st_other & STO_MIPS_ISA) == STO_MICROMIPS
- return ((this->nonvis() & (elfcpp::STO_MIPS_ISA >> 2))
- == elfcpp::STO_MICROMIPS >> 2);
- }
- // Return whether the symbol needs MIPS16 fn_stub.
- bool
- need_fn_stub() const
- { return this->need_fn_stub_; }
- // Set that the symbol needs MIPS16 fn_stub.
- void
- set_need_fn_stub()
- { this->need_fn_stub_ = true; }
- // Return whether this symbol is referenced by branch relocations from
- // any non-PIC input file.
- bool
- has_nonpic_branches() const
- { return this->has_nonpic_branches_; }
- // Set that this symbol is referenced by branch relocations from
- // any non-PIC input file.
- void
- set_has_nonpic_branches()
- { this->has_nonpic_branches_ = true; }
- // Return the offset of the la25 stub for this symbol from the start of the
- // la25 stub section.
- unsigned int
- la25_stub_offset() const
- { return this->la25_stub_offset_; }
- // Set the offset of the la25 stub for this symbol from the start of the
- // la25 stub section.
- void
- set_la25_stub_offset(unsigned int offset)
- { this->la25_stub_offset_ = offset; }
- // Return whether the symbol has la25 stub. This is true if this symbol is
- // for a PIC function, and there are non-PIC branches and jumps to it.
- bool
- has_la25_stub() const
- { return this->la25_stub_offset_ != -1U; }
- // Return whether there is a relocation against this symbol that must be
- // resolved by the static linker (that is, the relocation cannot possibly
- // be made dynamic).
- bool
- has_static_relocs() const
- { return this->has_static_relocs_; }
- // Set that there is a relocation against this symbol that must be resolved
- // by the static linker (that is, the relocation cannot possibly be made
- // dynamic).
- void
- set_has_static_relocs()
- { this->has_static_relocs_ = true; }
- // Return whether we must not create a lazy-binding stub for this symbol.
- bool
- no_lazy_stub() const
- { return this->no_lazy_stub_; }
- // Set that we must not create a lazy-binding stub for this symbol.
- void
- set_no_lazy_stub()
- { this->no_lazy_stub_ = true; }
- // Return the offset of the lazy-binding stub for this symbol from the start
- // of .MIPS.stubs section.
- unsigned int
- lazy_stub_offset() const
- { return this->lazy_stub_offset_; }
- // Set the offset of the lazy-binding stub for this symbol from the start
- // of .MIPS.stubs section.
- void
- set_lazy_stub_offset(unsigned int offset)
- { this->lazy_stub_offset_ = offset; }
- // Return whether there are any relocations for this symbol where
- // pointer equality matters.
- bool
- pointer_equality_needed() const
- { return this->pointer_equality_needed_; }
- // Set that there are relocations for this symbol where pointer equality
- // matters.
- void
- set_pointer_equality_needed()
- { this->pointer_equality_needed_ = true; }
- // Return global GOT area where this symbol in located.
- Global_got_area
- global_got_area() const
- { return this->global_got_area_; }
- // Set global GOT area where this symbol in located.
- void
- set_global_got_area(Global_got_area global_got_area)
- { this->global_got_area_ = global_got_area; }
- // Return the global GOT offset for this symbol. For multi-GOT links, this
- // returns the offset from the start of .got section to the first GOT entry
- // for the symbol. Note that in multi-GOT links the symbol can have entry
- // in more than one GOT.
- unsigned int
- global_gotoffset() const
- { return this->global_gotoffset_; }
- // Set the global GOT offset for this symbol. Note that in multi-GOT links
- // the symbol can have entry in more than one GOT. This method will set
- // the offset only if it is less than current offset.
- void
- set_global_gotoffset(unsigned int offset)
- {
- if (this->global_gotoffset_ == -1U || offset < this->global_gotoffset_)
- this->global_gotoffset_ = offset;
- }
- // Return whether all GOT relocations for this symbol are for calls.
- bool
- got_only_for_calls() const
- { return this->got_only_for_calls_; }
- // Set that there is a GOT relocation for this symbol that is not for call.
- void
- set_got_not_only_for_calls()
- { this->got_only_for_calls_ = false; }
- // Return whether this is a PIC symbol.
- bool
- is_pic() const
- {
- // (st_other & STO_MIPS_FLAGS) == STO_MIPS_PIC
- return ((this->nonvis() & (elfcpp::STO_MIPS_FLAGS >> 2))
- == (elfcpp::STO_MIPS_PIC >> 2));
- }
- // Set the flag in st_other field that marks this symbol as PIC.
- void
- set_pic()
- {
- if (this->is_mips16())
- // (st_other & ~(STO_MIPS16 | STO_MIPS_FLAGS)) | STO_MIPS_PIC
- this->set_nonvis((this->nonvis()
- & ~((elfcpp::STO_MIPS16 >> 2)
- | (elfcpp::STO_MIPS_FLAGS >> 2)))
- | (elfcpp::STO_MIPS_PIC >> 2));
- else
- // (other & ~STO_MIPS_FLAGS) | STO_MIPS_PIC
- this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS >> 2))
- | (elfcpp::STO_MIPS_PIC >> 2));
- }
- // Set the flag in st_other field that marks this symbol as PLT.
- void
- set_mips_plt()
- {
- if (this->is_mips16())
- // (st_other & (STO_MIPS16 | ~STO_MIPS_FLAGS)) | STO_MIPS_PLT
- this->set_nonvis((this->nonvis()
- & ((elfcpp::STO_MIPS16 >> 2)
- | ~(elfcpp::STO_MIPS_FLAGS >> 2)))
- | (elfcpp::STO_MIPS_PLT >> 2));
- else
- // (st_other & ~STO_MIPS_FLAGS) | STO_MIPS_PLT
- this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS >> 2))
- | (elfcpp::STO_MIPS_PLT >> 2));
- }
- // Downcast a base pointer to a Mips_symbol pointer.
- static Mips_symbol<size>*
- as_mips_sym(Symbol* sym)
- { return static_cast<Mips_symbol<size>*>(sym); }
- // Downcast a base pointer to a Mips_symbol pointer.
- static const Mips_symbol<size>*
- as_mips_sym(const Symbol* sym)
- { return static_cast<const Mips_symbol<size>*>(sym); }
- // Return whether the symbol has lazy-binding stub.
- bool
- has_lazy_stub() const
- { return this->has_lazy_stub_; }
- // Set whether the symbol has lazy-binding stub.
- void
- set_has_lazy_stub(bool has_lazy_stub)
- { this->has_lazy_stub_ = has_lazy_stub; }
- // Return whether the symbol needs a standard PLT entry.
- bool
- needs_mips_plt() const
- { return this->needs_mips_plt_; }
- // Set whether the symbol needs a standard PLT entry.
- void
- set_needs_mips_plt(bool needs_mips_plt)
- { this->needs_mips_plt_ = needs_mips_plt; }
- // Return whether the symbol needs a compressed (MIPS16 or microMIPS) PLT
- // entry.
- bool
- needs_comp_plt() const
- { return this->needs_comp_plt_; }
- // Set whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry.
- void
- set_needs_comp_plt(bool needs_comp_plt)
- { this->needs_comp_plt_ = needs_comp_plt; }
- // Return standard PLT entry offset, or -1 if none.
- unsigned int
- mips_plt_offset() const
- { return this->mips_plt_offset_; }
- // Set standard PLT entry offset.
- void
- set_mips_plt_offset(unsigned int mips_plt_offset)
- { this->mips_plt_offset_ = mips_plt_offset; }
- // Return whether the symbol has standard PLT entry.
- bool
- has_mips_plt_offset() const
- { return this->mips_plt_offset_ != -1U; }
- // Return compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none.
- unsigned int
- comp_plt_offset() const
- { return this->comp_plt_offset_; }
- // Set compressed (MIPS16 or microMIPS) PLT entry offset.
- void
- set_comp_plt_offset(unsigned int comp_plt_offset)
- { this->comp_plt_offset_ = comp_plt_offset; }
- // Return whether the symbol has compressed (MIPS16 or microMIPS) PLT entry.
- bool
- has_comp_plt_offset() const
- { return this->comp_plt_offset_ != -1U; }
- // Return MIPS16 fn stub for a symbol.
- template<bool big_endian>
- Mips16_stub_section<size, big_endian>*
- get_mips16_fn_stub() const
- {
- return static_cast<Mips16_stub_section<size, big_endian>*>(mips16_fn_stub_);
- }
- // Set MIPS16 fn stub for a symbol.
- void
- set_mips16_fn_stub(Mips16_stub_section_base* stub)
- { this->mips16_fn_stub_ = stub; }
- // Return whether symbol has MIPS16 fn stub.
- bool
- has_mips16_fn_stub() const
- { return this->mips16_fn_stub_ != NULL; }
- // Return MIPS16 call stub for a symbol.
- template<bool big_endian>
- Mips16_stub_section<size, big_endian>*
- get_mips16_call_stub() const
- {
- return static_cast<Mips16_stub_section<size, big_endian>*>(
- mips16_call_stub_);
- }
- // Set MIPS16 call stub for a symbol.
- void
- set_mips16_call_stub(Mips16_stub_section_base* stub)
- { this->mips16_call_stub_ = stub; }
- // Return whether symbol has MIPS16 call stub.
- bool
- has_mips16_call_stub() const
- { return this->mips16_call_stub_ != NULL; }
- // Return MIPS16 call_fp stub for a symbol.
- template<bool big_endian>
- Mips16_stub_section<size, big_endian>*
- get_mips16_call_fp_stub() const
- {
- return static_cast<Mips16_stub_section<size, big_endian>*>(
- mips16_call_fp_stub_);
- }
- // Set MIPS16 call_fp stub for a symbol.
- void
- set_mips16_call_fp_stub(Mips16_stub_section_base* stub)
- { this->mips16_call_fp_stub_ = stub; }
- // Return whether symbol has MIPS16 call_fp stub.
- bool
- has_mips16_call_fp_stub() const
- { return this->mips16_call_fp_stub_ != NULL; }
- bool
- get_applied_secondary_got_fixup() const
- { return applied_secondary_got_fixup_; }
- void
- set_applied_secondary_got_fixup()
- { this->applied_secondary_got_fixup_ = true; }
- // Return the hash of this symbol.
- size_t
- hash() const
- {
- return gold::string_hash<char>(this->name());
- }
- private:
- // Whether the symbol needs MIPS16 fn_stub. This is true if this symbol
- // appears in any relocs other than a 16 bit call.
- bool need_fn_stub_;
- // True if this symbol is referenced by branch relocations from
- // any non-PIC input file. This is used to determine whether an
- // la25 stub is required.
- bool has_nonpic_branches_;
- // The offset of the la25 stub for this symbol from the start of the
- // la25 stub section.
- unsigned int la25_stub_offset_;
- // True if there is a relocation against this symbol that must be
- // resolved by the static linker (that is, the relocation cannot
- // possibly be made dynamic).
- bool has_static_relocs_;
- // Whether we must not create a lazy-binding stub for this symbol.
- // This is true if the symbol has relocations related to taking the
- // function's address.
- bool no_lazy_stub_;
- // The offset of the lazy-binding stub for this symbol from the start of
- // .MIPS.stubs section.
- unsigned int lazy_stub_offset_;
- // True if there are any relocations for this symbol where pointer equality
- // matters.
- bool pointer_equality_needed_;
- // Global GOT area where this symbol in located, or GGA_NONE if symbol is not
- // in the global part of the GOT.
- Global_got_area global_got_area_;
- // The global GOT offset for this symbol. For multi-GOT links, this is offset
- // from the start of .got section to the first GOT entry for the symbol.
- // Note that in multi-GOT links the symbol can have entry in more than one GOT.
- unsigned int global_gotoffset_;
- // Whether all GOT relocations for this symbol are for calls.
- bool got_only_for_calls_;
- // Whether the symbol has lazy-binding stub.
- bool has_lazy_stub_;
- // Whether the symbol needs a standard PLT entry.
- bool needs_mips_plt_;
- // Whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry.
- bool needs_comp_plt_;
- // Standard PLT entry offset, or -1 if none.
- unsigned int mips_plt_offset_;
- // Compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none.
- unsigned int comp_plt_offset_;
- // MIPS16 fn stub for a symbol.
- Mips16_stub_section_base* mips16_fn_stub_;
- // MIPS16 call stub for a symbol.
- Mips16_stub_section_base* mips16_call_stub_;
- // MIPS16 call_fp stub for a symbol.
- Mips16_stub_section_base* mips16_call_fp_stub_;
- bool applied_secondary_got_fixup_;
- };
- // Mips16_stub_section class.
- // The mips16 compiler uses a couple of special sections to handle
- // floating point arguments.
- // Section names that look like .mips16.fn.FNNAME contain stubs that
- // copy floating point arguments from the fp regs to the gp regs and
- // then jump to FNNAME. If any 32 bit function calls FNNAME, the
- // call should be redirected to the stub instead. If no 32 bit
- // function calls FNNAME, the stub should be discarded. We need to
- // consider any reference to the function, not just a call, because
- // if the address of the function is taken we will need the stub,
- // since the address might be passed to a 32 bit function.
- // Section names that look like .mips16.call.FNNAME contain stubs
- // that copy floating point arguments from the gp regs to the fp
- // regs and then jump to FNNAME. If FNNAME is a 32 bit function,
- // then any 16 bit function that calls FNNAME should be redirected
- // to the stub instead. If FNNAME is not a 32 bit function, the
- // stub should be discarded.
- // .mips16.call.fp.FNNAME sections are similar, but contain stubs
- // which call FNNAME and then copy the return value from the fp regs
- // to the gp regs. These stubs store the return address in $18 while
- // calling FNNAME; any function which might call one of these stubs
- // must arrange to save $18 around the call. (This case is not
- // needed for 32 bit functions that call 16 bit functions, because
- // 16 bit functions always return floating point values in both
- // $f0/$f1 and $2/$3.)
- // Note that in all cases FNNAME might be defined statically.
- // Therefore, FNNAME is not used literally. Instead, the relocation
- // information will indicate which symbol the section is for.
- // We record any stubs that we find in the symbol table.
- // TODO(sasa): All mips16 stub sections should be emitted in the .text section.
- class Mips16_stub_section_base { };
- template<int size, bool big_endian>
- class Mips16_stub_section : public Mips16_stub_section_base
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- public:
- Mips16_stub_section(Mips_relobj<size, big_endian>* object, unsigned int shndx)
- : object_(object), shndx_(shndx), r_sym_(0), gsym_(NULL),
- found_r_mips_none_(false)
- {
- gold_assert(object->is_mips16_fn_stub_section(shndx)
- || object->is_mips16_call_stub_section(shndx)
- || object->is_mips16_call_fp_stub_section(shndx));
- }
- // Return the object of this stub section.
- Mips_relobj<size, big_endian>*
- object() const
- { return this->object_; }
- // Return the size of a section.
- uint64_t
- section_size() const
- { return this->object_->section_size(this->shndx_); }
- // Return section index of this stub section.
- unsigned int
- shndx() const
- { return this->shndx_; }
- // Return symbol index, if stub is for a local function.
- unsigned int
- r_sym() const
- { return this->r_sym_; }
- // Return symbol, if stub is for a global function.
- Mips_symbol<size>*
- gsym() const
- { return this->gsym_; }
- // Return whether stub is for a local function.
- bool
- is_for_local_function() const
- { return this->gsym_ == NULL; }
- // This method is called when a new relocation R_TYPE for local symbol R_SYM
- // is found in the stub section. Try to find stub target.
- void
- new_local_reloc_found(unsigned int r_type, unsigned int r_sym)
- {
- // To find target symbol for this stub, trust the first R_MIPS_NONE
- // relocation, if any. Otherwise trust the first relocation, whatever
- // its kind.
- if (this->found_r_mips_none_)
- return;
- if (r_type == elfcpp::R_MIPS_NONE)
- {
- this->r_sym_ = r_sym;
- this->gsym_ = NULL;
- this->found_r_mips_none_ = true;
- }
- else if (!is_target_found())
- this->r_sym_ = r_sym;
- }
- // This method is called when a new relocation R_TYPE for global symbol GSYM
- // is found in the stub section. Try to find stub target.
- void
- new_global_reloc_found(unsigned int r_type, Mips_symbol<size>* gsym)
- {
- // To find target symbol for this stub, trust the first R_MIPS_NONE
- // relocation, if any. Otherwise trust the first relocation, whatever
- // its kind.
- if (this->found_r_mips_none_)
- return;
- if (r_type == elfcpp::R_MIPS_NONE)
- {
- this->gsym_ = gsym;
- this->r_sym_ = 0;
- this->found_r_mips_none_ = true;
- }
- else if (!is_target_found())
- this->gsym_ = gsym;
- }
- // Return whether we found the stub target.
- bool
- is_target_found() const
- { return this->r_sym_ != 0 || this->gsym_ != NULL; }
- // Return whether this is a fn stub.
- bool
- is_fn_stub() const
- { return this->object_->is_mips16_fn_stub_section(this->shndx_); }
- // Return whether this is a call stub.
- bool
- is_call_stub() const
- { return this->object_->is_mips16_call_stub_section(this->shndx_); }
- // Return whether this is a call_fp stub.
- bool
- is_call_fp_stub() const
- { return this->object_->is_mips16_call_fp_stub_section(this->shndx_); }
- // Return the output address.
- Mips_address
- output_address() const
- {
- return (this->object_->output_section(this->shndx_)->address()
- + this->object_->output_section_offset(this->shndx_));
- }
- private:
- // The object of this stub section.
- Mips_relobj<size, big_endian>* object_;
- // The section index of this stub section.
- unsigned int shndx_;
- // The symbol index, if stub is for a local function.
- unsigned int r_sym_;
- // The symbol, if stub is for a global function.
- Mips_symbol<size>* gsym_;
- // True if we found R_MIPS_NONE relocation in this stub.
- bool found_r_mips_none_;
- };
- // Mips_relobj class.
- template<int size, bool big_endian>
- class Mips_relobj : public Sized_relobj_file<size, big_endian>
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- typedef std::map<unsigned int, Mips16_stub_section<size, big_endian>*>
- Mips16_stubs_int_map;
- typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype;
- public:
- Mips_relobj(const std::string& name, Input_file* input_file, off_t offset,
- const typename elfcpp::Ehdr<size, big_endian>& ehdr)
- : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr),
- processor_specific_flags_(0), local_symbol_is_mips16_(),
- local_symbol_is_micromips_(), mips16_stub_sections_(),
- local_non_16bit_calls_(), local_16bit_calls_(), local_mips16_fn_stubs_(),
- local_mips16_call_stubs_(), gp_(0), has_reginfo_section_(false),
- merge_processor_specific_data_(true), got_info_(NULL),
- section_is_mips16_fn_stub_(), section_is_mips16_call_stub_(),
- section_is_mips16_call_fp_stub_(), pdr_shndx_(-1U),
- attributes_section_data_(NULL), abiflags_(NULL), gprmask_(0),
- cprmask1_(0), cprmask2_(0), cprmask3_(0), cprmask4_(0)
- {
- this->is_pic_ = (ehdr.get_e_flags() & elfcpp::EF_MIPS_PIC) != 0;
- this->is_n32_ = elfcpp::abi_n32(ehdr.get_e_flags());
- }
- ~Mips_relobj()
- { delete this->attributes_section_data_; }
- // Downcast a base pointer to a Mips_relobj pointer. This is
- // not type-safe but we only use Mips_relobj not the base class.
- static Mips_relobj<size, big_endian>*
- as_mips_relobj(Relobj* relobj)
- { return static_cast<Mips_relobj<size, big_endian>*>(relobj); }
- // Downcast a base pointer to a Mips_relobj pointer. This is
- // not type-safe but we only use Mips_relobj not the base class.
- static const Mips_relobj<size, big_endian>*
- as_mips_relobj(const Relobj* relobj)
- { return static_cast<const Mips_relobj<size, big_endian>*>(relobj); }
- // Processor-specific flags in ELF file header. This is valid only after
- // reading symbols.
- elfcpp::Elf_Word
- processor_specific_flags() const
- { return this->processor_specific_flags_; }
- // Whether a local symbol is MIPS16 symbol. R_SYM is the symbol table
- // index. This is only valid after do_count_local_symbol is called.
- bool
- local_symbol_is_mips16(unsigned int r_sym) const
- {
- gold_assert(r_sym < this->local_symbol_is_mips16_.size());
- return this->local_symbol_is_mips16_[r_sym];
- }
- // Whether a local symbol is microMIPS symbol. R_SYM is the symbol table
- // index. This is only valid after do_count_local_symbol is called.
- bool
- local_symbol_is_micromips(unsigned int r_sym) const
- {
- gold_assert(r_sym < this->local_symbol_is_micromips_.size());
- return this->local_symbol_is_micromips_[r_sym];
- }
- // Get or create MIPS16 stub section.
- Mips16_stub_section<size, big_endian>*
- get_mips16_stub_section(unsigned int shndx)
- {
- typename Mips16_stubs_int_map::const_iterator it =
- this->mips16_stub_sections_.find(shndx);
- if (it != this->mips16_stub_sections_.end())
- return (*it).second;
- Mips16_stub_section<size, big_endian>* stub_section =
- new Mips16_stub_section<size, big_endian>(this, shndx);
- this->mips16_stub_sections_.insert(
- std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>(
- stub_section->shndx(), stub_section));
- return stub_section;
- }
- // Return MIPS16 fn stub section for local symbol R_SYM, or NULL if this
- // object doesn't have fn stub for R_SYM.
- Mips16_stub_section<size, big_endian>*
- get_local_mips16_fn_stub(unsigned int r_sym) const
- {
- typename Mips16_stubs_int_map::const_iterator it =
- this->local_mips16_fn_stubs_.find(r_sym);
- if (it != this->local_mips16_fn_stubs_.end())
- return (*it).second;
- return NULL;
- }
- // Record that this object has MIPS16 fn stub for local symbol. This method
- // is only called if we decided not to discard the stub.
- void
- add_local_mips16_fn_stub(Mips16_stub_section<size, big_endian>* stub)
- {
- gold_assert(stub->is_for_local_function());
- unsigned int r_sym = stub->r_sym();
- this->local_mips16_fn_stubs_.insert(
- std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>(
- r_sym, stub));
- }
- // Return MIPS16 call stub section for local symbol R_SYM, or NULL if this
- // object doesn't have call stub for R_SYM.
- Mips16_stub_section<size, big_endian>*
- get_local_mips16_call_stub(unsigned int r_sym) const
- {
- typename Mips16_stubs_int_map::const_iterator it =
- this->local_mips16_call_stubs_.find(r_sym);
- if (it != this->local_mips16_call_stubs_.end())
- return (*it).second;
- return NULL;
- }
- // Record that this object has MIPS16 call stub for local symbol. This method
- // is only called if we decided not to discard the stub.
- void
- add_local_mips16_call_stub(Mips16_stub_section<size, big_endian>* stub)
- {
- gold_assert(stub->is_for_local_function());
- unsigned int r_sym = stub->r_sym();
- this->local_mips16_call_stubs_.insert(
- std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>(
- r_sym, stub));
- }
- // Record that we found "non 16-bit" call relocation against local symbol
- // SYMNDX. This reloc would need to refer to a MIPS16 fn stub, if there
- // is one.
- void
- add_local_non_16bit_call(unsigned int symndx)
- { this->local_non_16bit_calls_.insert(symndx); }
- // Return true if there is any "non 16-bit" call relocation against local
- // symbol SYMNDX in this object.
- bool
- has_local_non_16bit_call_relocs(unsigned int symndx)
- {
- return (this->local_non_16bit_calls_.find(symndx)
- != this->local_non_16bit_calls_.end());
- }
- // Record that we found 16-bit call relocation R_MIPS16_26 against local
- // symbol SYMNDX. Local MIPS16 call or call_fp stubs will only be needed
- // if there is some R_MIPS16_26 relocation that refers to the stub symbol.
- void
- add_local_16bit_call(unsigned int symndx)
- { this->local_16bit_calls_.insert(symndx); }
- // Return true if there is any 16-bit call relocation R_MIPS16_26 against local
- // symbol SYMNDX in this object.
- bool
- has_local_16bit_call_relocs(unsigned int symndx)
- {
- return (this->local_16bit_calls_.find(symndx)
- != this->local_16bit_calls_.end());
- }
- // Get gp value that was used to create this object.
- Mips_address
- gp_value() const
- { return this->gp_; }
- // Return whether the object is a PIC object.
- bool
- is_pic() const
- { return this->is_pic_; }
- // Return whether the object uses N32 ABI.
- bool
- is_n32() const
- { return this->is_n32_; }
- // Return whether the object uses N64 ABI.
- bool
- is_n64() const
- { return size == 64; }
- // Return whether the object uses NewABI conventions.
- bool
- is_newabi() const
- { return this->is_n32() || this->is_n64(); }
- // Return Mips_got_info for this object.
- Mips_got_info<size, big_endian>*
- get_got_info() const
- { return this->got_info_; }
- // Return Mips_got_info for this object. Create new info if it doesn't exist.
- Mips_got_info<size, big_endian>*
- get_or_create_got_info()
- {
- if (!this->got_info_)
- this->got_info_ = new Mips_got_info<size, big_endian>();
- return this->got_info_;
- }
- // Set Mips_got_info for this object.
- void
- set_got_info(Mips_got_info<size, big_endian>* got_info)
- { this->got_info_ = got_info; }
- // Whether a section SHDNX is a MIPS16 stub section. This is only valid
- // after do_read_symbols is called.
- bool
- is_mips16_stub_section(unsigned int shndx)
- {
- return (is_mips16_fn_stub_section(shndx)
- || is_mips16_call_stub_section(shndx)
- || is_mips16_call_fp_stub_section(shndx));
- }
- // Return TRUE if relocations in section SHNDX can refer directly to a
- // MIPS16 function rather than to a hard-float stub. This is only valid
- // after do_read_symbols is called.
- bool
- section_allows_mips16_refs(unsigned int shndx)
- {
- return (this->is_mips16_stub_section(shndx) || shndx == this->pdr_shndx_);
- }
- // Whether a section SHDNX is a MIPS16 fn stub section. This is only valid
- // after do_read_symbols is called.
- bool
- is_mips16_fn_stub_section(unsigned int shndx)
- {
- gold_assert(shndx < this->section_is_mips16_fn_stub_.size());
- return this->section_is_mips16_fn_stub_[shndx];
- }
- // Whether a section SHDNX is a MIPS16 call stub section. This is only valid
- // after do_read_symbols is called.
- bool
- is_mips16_call_stub_section(unsigned int shndx)
- {
- gold_assert(shndx < this->section_is_mips16_call_stub_.size());
- return this->section_is_mips16_call_stub_[shndx];
- }
- // Whether a section SHDNX is a MIPS16 call_fp stub section. This is only
- // valid after do_read_symbols is called.
- bool
- is_mips16_call_fp_stub_section(unsigned int shndx)
- {
- gold_assert(shndx < this->section_is_mips16_call_fp_stub_.size());
- return this->section_is_mips16_call_fp_stub_[shndx];
- }
- // Discard MIPS16 stub secions that are not needed.
- void
- discard_mips16_stub_sections(Symbol_table* symtab);
- // Return whether there is a .reginfo section.
- bool
- has_reginfo_section() const
- { return this->has_reginfo_section_; }
- // Return whether we want to merge processor-specific data.
- bool
- merge_processor_specific_data() const
- { return this->merge_processor_specific_data_; }
- // Return gprmask from the .reginfo section of this object.
- Valtype
- gprmask() const
- { return this->gprmask_; }
- // Return cprmask1 from the .reginfo section of this object.
- Valtype
- cprmask1() const
- { return this->cprmask1_; }
- // Return cprmask2 from the .reginfo section of this object.
- Valtype
- cprmask2() const
- { return this->cprmask2_; }
- // Return cprmask3 from the .reginfo section of this object.
- Valtype
- cprmask3() const
- { return this->cprmask3_; }
- // Return cprmask4 from the .reginfo section of this object.
- Valtype
- cprmask4() const
- { return this->cprmask4_; }
- // This is the contents of the .MIPS.abiflags section if there is one.
- Mips_abiflags<big_endian>*
- abiflags()
- { return this->abiflags_; }
- // This is the contents of the .gnu.attribute section if there is one.
- const Attributes_section_data*
- attributes_section_data() const
- { return this->attributes_section_data_; }
- protected:
- // Count the local symbols.
- void
- do_count_local_symbols(Stringpool_template<char>*,
- Stringpool_template<char>*);
- // Read the symbol information.
- void
- do_read_symbols(Read_symbols_data* sd);
- private:
- // The name of the options section.
- const char* mips_elf_options_section_name()
- { return this->is_newabi() ? ".MIPS.options" : ".options"; }
- // processor-specific flags in ELF file header.
- elfcpp::Elf_Word processor_specific_flags_;
- // Bit vector to tell if a local symbol is a MIPS16 symbol or not.
- // This is only valid after do_count_local_symbol is called.
- std::vector<bool> local_symbol_is_mips16_;
- // Bit vector to tell if a local symbol is a microMIPS symbol or not.
- // This is only valid after do_count_local_symbol is called.
- std::vector<bool> local_symbol_is_micromips_;
- // Map from section index to the MIPS16 stub for that section. This contains
- // all stubs found in this object.
- Mips16_stubs_int_map mips16_stub_sections_;
- // Local symbols that have "non 16-bit" call relocation. This relocation
- // would need to refer to a MIPS16 fn stub, if there is one.
- std::set<unsigned int> local_non_16bit_calls_;
- // Local symbols that have 16-bit call relocation R_MIPS16_26. Local MIPS16
- // call or call_fp stubs will only be needed if there is some R_MIPS16_26
- // relocation that refers to the stub symbol.
- std::set<unsigned int> local_16bit_calls_;
- // Map from local symbol index to the MIPS16 fn stub for that symbol.
- // This contains only the stubs that we decided not to discard.
- Mips16_stubs_int_map local_mips16_fn_stubs_;
- // Map from local symbol index to the MIPS16 call stub for that symbol.
- // This contains only the stubs that we decided not to discard.
- Mips16_stubs_int_map local_mips16_call_stubs_;
- // gp value that was used to create this object.
- Mips_address gp_;
- // Whether the object is a PIC object.
- bool is_pic_ : 1;
- // Whether the object uses N32 ABI.
- bool is_n32_ : 1;
- // Whether the object contains a .reginfo section.
- bool has_reginfo_section_ : 1;
- // Whether we merge processor-specific data of this object to output.
- bool merge_processor_specific_data_ : 1;
- // The Mips_got_info for this object.
- Mips_got_info<size, big_endian>* got_info_;
- // Bit vector to tell if a section is a MIPS16 fn stub section or not.
- // This is only valid after do_read_symbols is called.
- std::vector<bool> section_is_mips16_fn_stub_;
- // Bit vector to tell if a section is a MIPS16 call stub section or not.
- // This is only valid after do_read_symbols is called.
- std::vector<bool> section_is_mips16_call_stub_;
- // Bit vector to tell if a section is a MIPS16 call_fp stub section or not.
- // This is only valid after do_read_symbols is called.
- std::vector<bool> section_is_mips16_call_fp_stub_;
- // .pdr section index.
- unsigned int pdr_shndx_;
- // Object attributes if there is a .gnu.attributes section or NULL.
- Attributes_section_data* attributes_section_data_;
- // Object abiflags if there is a .MIPS.abiflags section or NULL.
- Mips_abiflags<big_endian>* abiflags_;
- // gprmask from the .reginfo section of this object.
- Valtype gprmask_;
- // cprmask1 from the .reginfo section of this object.
- Valtype cprmask1_;
- // cprmask2 from the .reginfo section of this object.
- Valtype cprmask2_;
- // cprmask3 from the .reginfo section of this object.
- Valtype cprmask3_;
- // cprmask4 from the .reginfo section of this object.
- Valtype cprmask4_;
- };
- // Mips_output_data_got class.
- template<int size, bool big_endian>
- class Mips_output_data_got : public Output_data_got<size, big_endian>
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian>
- Reloc_section;
- typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype;
- public:
- Mips_output_data_got(Target_mips<size, big_endian>* target,
- Symbol_table* symtab, Layout* layout)
- : Output_data_got<size, big_endian>(), target_(target),
- symbol_table_(symtab), layout_(layout), static_relocs_(), got_view_(NULL),
- first_global_got_dynsym_index_(-1U), primary_got_(NULL),
- secondary_got_relocs_()
- {
- this->master_got_info_ = new Mips_got_info<size, big_endian>();
- this->set_addralign(16);
- }
- // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
- // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
- void
- record_local_got_symbol(Mips_relobj<size, big_endian>* object,
- unsigned int symndx, Mips_address addend,
- unsigned int r_type, unsigned int shndx,
- bool is_section_symbol)
- {
- this->master_got_info_->record_local_got_symbol(object, symndx, addend,
- r_type, shndx,
- is_section_symbol);
- }
- // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
- // in OBJECT. FOR_CALL is true if the caller is only interested in
- // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
- // relocation.
- void
- record_global_got_symbol(Mips_symbol<size>* mips_sym,
- Mips_relobj<size, big_endian>* object,
- unsigned int r_type, bool dyn_reloc, bool for_call)
- {
- this->master_got_info_->record_global_got_symbol(mips_sym, object, r_type,
- dyn_reloc, for_call);
- }
- // Record that OBJECT has a page relocation against symbol SYMNDX and
- // that ADDEND is the addend for that relocation.
- void
- record_got_page_entry(Mips_relobj<size, big_endian>* object,
- unsigned int symndx, int addend)
- { this->master_got_info_->record_got_page_entry(object, symndx, addend); }
- // Add a static entry for the GOT entry at OFFSET. GSYM is a global
- // symbol and R_TYPE is the code of a dynamic relocation that needs to be
- // applied in a static link.
- void
- add_static_reloc(unsigned int got_offset, unsigned int r_type,
- Mips_symbol<size>* gsym)
- { this->static_relocs_.push_back(Static_reloc(got_offset, r_type, gsym)); }
- // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object
- // defining a local symbol with INDEX. R_TYPE is the code of a dynamic
- // relocation that needs to be applied in a static link.
- void
- add_static_reloc(unsigned int got_offset, unsigned int r_type,
- Sized_relobj_file<size, big_endian>* relobj,
- unsigned int index)
- {
- this->static_relocs_.push_back(Static_reloc(got_offset, r_type, relobj,
- index));
- }
- // Record that global symbol GSYM has R_TYPE dynamic relocation in the
- // secondary GOT at OFFSET.
- void
- add_secondary_got_reloc(unsigned int got_offset, unsigned int r_type,
- Mips_symbol<size>* gsym)
- {
- this->secondary_got_relocs_.push_back(Static_reloc(got_offset,
- r_type, gsym));
- }
- // Update GOT entry at OFFSET with VALUE.
- void
- update_got_entry(unsigned int offset, Mips_address value)
- {
- elfcpp::Swap<size, big_endian>::writeval(this->got_view_ + offset, value);
- }
- // Return the number of entries in local part of the GOT. This includes
- // local entries, page entries and 2 reserved entries.
- unsigned int
- get_local_gotno() const
- {
- if (!this->multi_got())
- {
- return (2 + this->master_got_info_->local_gotno()
- + this->master_got_info_->page_gotno());
- }
- else
- return 2 + this->primary_got_->local_gotno() + this->primary_got_->page_gotno();
- }
- // Return dynamic symbol table index of the first symbol with global GOT
- // entry.
- unsigned int
- first_global_got_dynsym_index() const
- { return this->first_global_got_dynsym_index_; }
- // Set dynamic symbol table index of the first symbol with global GOT entry.
- void
- set_first_global_got_dynsym_index(unsigned int index)
- { this->first_global_got_dynsym_index_ = index; }
- // Lay out the GOT. Add local, global and TLS entries. If GOT is
- // larger than 64K, create multi-GOT.
- void
- lay_out_got(Layout* layout, Symbol_table* symtab,
- const Input_objects* input_objects);
- // Create multi-GOT. For every GOT, add local, global and TLS entries.
- void
- lay_out_multi_got(Layout* layout, const Input_objects* input_objects);
- // Attempt to merge GOTs of different input objects.
- void
- merge_gots(const Input_objects* input_objects);
- // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if
- // this would lead to overflow, true if they were merged successfully.
- bool
- merge_got_with(Mips_got_info<size, big_endian>* from,
- Mips_relobj<size, big_endian>* object,
- Mips_got_info<size, big_endian>* to);
- // Return the offset of GOT page entry for VALUE. For multi-GOT links,
- // use OBJECT's GOT.
- unsigned int
- get_got_page_offset(Mips_address value,
- const Mips_relobj<size, big_endian>* object)
- {
- Mips_got_info<size, big_endian>* g = (!this->multi_got()
- ? this->master_got_info_
- : object->get_got_info());
- gold_assert(g != NULL);
- return g->get_got_page_offset(value, this);
- }
- // Return the GOT offset of type GOT_TYPE of the global symbol
- // GSYM. For multi-GOT links, use OBJECT's GOT.
- unsigned int got_offset(const Symbol* gsym, unsigned int got_type,
- Mips_relobj<size, big_endian>* object) const
- {
- if (!this->multi_got())
- return gsym->got_offset(got_type);
- else
- {
- Mips_got_info<size, big_endian>* g = object->get_got_info();
- gold_assert(g != NULL);
- return gsym->got_offset(g->multigot_got_type(got_type));
- }
- }
- // Return the GOT offset of type GOT_TYPE of the local symbol
- // SYMNDX.
- unsigned int
- got_offset(unsigned int symndx, unsigned int got_type,
- Sized_relobj_file<size, big_endian>* object,
- uint64_t addend) const
- { return object->local_got_offset(symndx, got_type, addend); }
- // Return the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT.
- unsigned int
- tls_ldm_offset(Mips_relobj<size, big_endian>* object) const
- {
- Mips_got_info<size, big_endian>* g = (!this->multi_got()
- ? this->master_got_info_
- : object->get_got_info());
- gold_assert(g != NULL);
- return g->tls_ldm_offset();
- }
- // Set the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT.
- void
- set_tls_ldm_offset(unsigned int tls_ldm_offset,
- Mips_relobj<size, big_endian>* object)
- {
- Mips_got_info<size, big_endian>* g = (!this->multi_got()
- ? this->master_got_info_
- : object->get_got_info());
- gold_assert(g != NULL);
- g->set_tls_ldm_offset(tls_ldm_offset);
- }
- // Return true for multi-GOT links.
- bool
- multi_got() const
- { return this->primary_got_ != NULL; }
- // Return the offset of OBJECT's GOT from the start of .got section.
- unsigned int
- get_got_offset(const Mips_relobj<size, big_endian>* object)
- {
- if (!this->multi_got())
- return 0;
- else
- {
- Mips_got_info<size, big_endian>* g = object->get_got_info();
- return g != NULL ? g->offset() : 0;
- }
- }
- // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
- void
- add_reloc_only_entries()
- { this->master_got_info_->add_reloc_only_entries(this); }
- // Return offset of the primary GOT's entry for global symbol.
- unsigned int
- get_primary_got_offset(const Mips_symbol<size>* sym) const
- {
- gold_assert(sym->global_got_area() != GGA_NONE);
- return (this->get_local_gotno() + sym->dynsym_index()
- - this->first_global_got_dynsym_index()) * size/8;
- }
- // For the entry at offset GOT_OFFSET, return its offset from the gp.
- // Input argument GOT_OFFSET is always global offset from the start of
- // .got section, for both single and multi-GOT links.
- // For single GOT links, this returns GOT_OFFSET - 0x7FF0. For multi-GOT
- // links, the return value is object_got_offset - 0x7FF0, where
- // object_got_offset is offset in the OBJECT's GOT.
- int
- gp_offset(unsigned int got_offset,
- const Mips_relobj<size, big_endian>* object) const
- {
- return (this->address() + got_offset
- - this->target_->adjusted_gp_value(object));
- }
- protected:
- // Write out the GOT table.
- void
- do_write(Output_file*);
- private:
- // This class represent dynamic relocations that need to be applied by
- // gold because we are using TLS relocations in a static link.
- class Static_reloc
- {
- public:
- Static_reloc(unsigned int got_offset, unsigned int r_type,
- Mips_symbol<size>* gsym)
- : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(true)
- { this->u_.global.symbol = gsym; }
- Static_reloc(unsigned int got_offset, unsigned int r_type,
- Sized_relobj_file<size, big_endian>* relobj, unsigned int index)
- : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(false)
- {
- this->u_.local.relobj = relobj;
- this->u_.local.index = index;
- }
- // Return the GOT offset.
- unsigned int
- got_offset() const
- { return this->got_offset_; }
- // Relocation type.
- unsigned int
- r_type() const
- { return this->r_type_; }
- // Whether the symbol is global or not.
- bool
- symbol_is_global() const
- { return this->symbol_is_global_; }
- // For a relocation against a global symbol, the global symbol.
- Mips_symbol<size>*
- symbol() const
- {
- gold_assert(this->symbol_is_global_);
- return this->u_.global.symbol;
- }
- // For a relocation against a local symbol, the defining object.
- Sized_relobj_file<size, big_endian>*
- relobj() const
- {
- gold_assert(!this->symbol_is_global_);
- return this->u_.local.relobj;
- }
- // For a relocation against a local symbol, the local symbol index.
- unsigned int
- index() const
- {
- gold_assert(!this->symbol_is_global_);
- return this->u_.local.index;
- }
- private:
- // GOT offset of the entry to which this relocation is applied.
- unsigned int got_offset_;
- // Type of relocation.
- unsigned int r_type_;
- // Whether this relocation is against a global symbol.
- bool symbol_is_global_;
- // A global or local symbol.
- union
- {
- struct
- {
- // For a global symbol, the symbol itself.
- Mips_symbol<size>* symbol;
- } global;
- struct
- {
- // For a local symbol, the object defining object.
- Sized_relobj_file<size, big_endian>* relobj;
- // For a local symbol, the symbol index.
- unsigned int index;
- } local;
- } u_;
- };
- // The target.
- Target_mips<size, big_endian>* target_;
- // The symbol table.
- Symbol_table* symbol_table_;
- // The layout.
- Layout* layout_;
- // Static relocs to be applied to the GOT.
- std::vector<Static_reloc> static_relocs_;
- // .got section view.
- unsigned char* got_view_;
- // The dynamic symbol table index of the first symbol with global GOT entry.
- unsigned int first_global_got_dynsym_index_;
- // The master GOT information.
- Mips_got_info<size, big_endian>* master_got_info_;
- // The primary GOT information.
- Mips_got_info<size, big_endian>* primary_got_;
- // Secondary GOT fixups.
- std::vector<Static_reloc> secondary_got_relocs_;
- };
- // A class to handle LA25 stubs - non-PIC interface to a PIC function. There are
- // two ways of creating these interfaces. The first is to add:
- //
- // lui $25,%hi(func)
- // j func
- // addiu $25,$25,%lo(func)
- //
- // to a separate trampoline section. The second is to add:
- //
- // lui $25,%hi(func)
- // addiu $25,$25,%lo(func)
- //
- // immediately before a PIC function "func", but only if a function is at the
- // beginning of the section, and the section is not too heavily aligned (i.e we
- // would need to add no more than 2 nops before the stub.)
- //
- // We only create stubs of the first type.
- template<int size, bool big_endian>
- class Mips_output_data_la25_stub : public Output_section_data
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- public:
- Mips_output_data_la25_stub()
- : Output_section_data(size == 32 ? 4 : 8), symbols_()
- { }
- // Create LA25 stub for a symbol.
- void
- create_la25_stub(Symbol_table* symtab, Target_mips<size, big_endian>* target,
- Mips_symbol<size>* gsym);
- // Return output address of a stub.
- Mips_address
- stub_address(const Mips_symbol<size>* sym) const
- {
- gold_assert(sym->has_la25_stub());
- return this->address() + sym->la25_stub_offset();
- }
- protected:
- void
- do_adjust_output_section(Output_section* os)
- { os->set_entsize(0); }
- private:
- // Template for standard LA25 stub.
- static const uint32_t la25_stub_entry[];
- // Template for microMIPS LA25 stub.
- static const uint32_t la25_stub_micromips_entry[];
- // Set the final size.
- void
- set_final_data_size()
- { this->set_data_size(this->symbols_.size() * 16); }
- // Create a symbol for SYM stub's value and size, to help make the
- // disassembly easier to read.
- void
- create_stub_symbol(Mips_symbol<size>* sym, Symbol_table* symtab,
- Target_mips<size, big_endian>* target, uint64_t symsize);
- // Write to a map file.
- void
- do_print_to_mapfile(Mapfile* mapfile) const
- { mapfile->print_output_data(this, _(".LA25.stubs")); }
- // Write out the LA25 stub section.
- void
- do_write(Output_file*);
- // Symbols that have LA25 stubs.
- std::vector<Mips_symbol<size>*> symbols_;
- };
- // MIPS-specific relocation writer.
- template<int sh_type, bool dynamic, int size, bool big_endian>
- struct Mips_output_reloc_writer;
- template<int sh_type, bool dynamic, bool big_endian>
- struct Mips_output_reloc_writer<sh_type, dynamic, 32, big_endian>
- {
- typedef Output_reloc<sh_type, dynamic, 32, big_endian> Output_reloc_type;
- typedef std::vector<Output_reloc_type> Relocs;
- static void
- write(typename Relocs::const_iterator p, unsigned char* pov)
- { p->write(pov); }
- };
- template<int sh_type, bool dynamic, bool big_endian>
- struct Mips_output_reloc_writer<sh_type, dynamic, 64, big_endian>
- {
- typedef Output_reloc<sh_type, dynamic, 64, big_endian> Output_reloc_type;
- typedef std::vector<Output_reloc_type> Relocs;
- static void
- write(typename Relocs::const_iterator p, unsigned char* pov)
- {
- elfcpp::Mips64_rel_write<big_endian> orel(pov);
- orel.put_r_offset(p->get_address());
- orel.put_r_sym(p->get_symbol_index());
- orel.put_r_ssym(RSS_UNDEF);
- orel.put_r_type(p->type());
- if (p->type() == elfcpp::R_MIPS_REL32)
- orel.put_r_type2(elfcpp::R_MIPS_64);
- else
- orel.put_r_type2(elfcpp::R_MIPS_NONE);
- orel.put_r_type3(elfcpp::R_MIPS_NONE);
- }
- };
- template<int sh_type, bool dynamic, int size, bool big_endian>
- class Mips_output_data_reloc : public Output_data_reloc<sh_type, dynamic,
- size, big_endian>
- {
- public:
- Mips_output_data_reloc(bool sort_relocs)
- : Output_data_reloc<sh_type, dynamic, size, big_endian>(sort_relocs)
- { }
- protected:
- // Write out the data.
- void
- do_write(Output_file* of)
- {
- typedef Mips_output_reloc_writer<sh_type, dynamic, size,
- big_endian> Writer;
- this->template do_write_generic<Writer>(of);
- }
- };
- // A class to handle the PLT data.
- template<int size, bool big_endian>
- class Mips_output_data_plt : public Output_section_data
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- typedef Mips_output_data_reloc<elfcpp::SHT_REL, true,
- size, big_endian> Reloc_section;
- public:
- // Create the PLT section. The ordinary .got section is an argument,
- // since we need to refer to the start.
- Mips_output_data_plt(Layout* layout, Output_data_space* got_plt,
- Target_mips<size, big_endian>* target)
- : Output_section_data(size == 32 ? 4 : 8), got_plt_(got_plt), symbols_(),
- plt_mips_offset_(0), plt_comp_offset_(0), plt_header_size_(0),
- target_(target)
- {
- this->rel_ = new Reloc_section(false);
- layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL,
- elfcpp::SHF_ALLOC, this->rel_,
- ORDER_DYNAMIC_PLT_RELOCS, false);
- }
- // Add an entry to the PLT for a symbol referenced by r_type relocation.
- void
- add_entry(Mips_symbol<size>* gsym, unsigned int r_type);
- // Return the .rel.plt section data.
- Reloc_section*
- rel_plt() const
- { return this->rel_; }
- // Return the number of PLT entries.
- unsigned int
- entry_count() const
- { return this->symbols_.size(); }
- // Return the offset of the first non-reserved PLT entry.
- unsigned int
- first_plt_entry_offset() const
- { return sizeof(plt0_entry_o32); }
- // Return the size of a PLT entry.
- unsigned int
- plt_entry_size() const
- { return sizeof(plt_entry); }
- // Set final PLT offsets. For each symbol, determine whether standard or
- // compressed (MIPS16 or microMIPS) PLT entry is used.
- void
- set_plt_offsets();
- // Return the offset of the first standard PLT entry.
- unsigned int
- first_mips_plt_offset() const
- { return this->plt_header_size_; }
- // Return the offset of the first compressed PLT entry.
- unsigned int
- first_comp_plt_offset() const
- { return this->plt_header_size_ + this->plt_mips_offset_; }
- // Return whether there are any standard PLT entries.
- bool
- has_standard_entries() const
- { return this->plt_mips_offset_ > 0; }
- // Return the output address of standard PLT entry.
- Mips_address
- mips_entry_address(const Mips_symbol<size>* sym) const
- {
- gold_assert (sym->has_mips_plt_offset());
- return (this->address() + this->first_mips_plt_offset()
- + sym->mips_plt_offset());
- }
- // Return the output address of compressed (MIPS16 or microMIPS) PLT entry.
- Mips_address
- comp_entry_address(const Mips_symbol<size>* sym) const
- {
- gold_assert (sym->has_comp_plt_offset());
- return (this->address() + this->first_comp_plt_offset()
- + sym->comp_plt_offset());
- }
- protected:
- void
- do_adjust_output_section(Output_section* os)
- { os->set_entsize(0); }
- // Write to a map file.
- void
- do_print_to_mapfile(Mapfile* mapfile) const
- { mapfile->print_output_data(this, _(".plt")); }
- private:
- // Template for the first PLT entry.
- static const uint32_t plt0_entry_o32[];
- static const uint32_t plt0_entry_n32[];
- static const uint32_t plt0_entry_n64[];
- static const uint32_t plt0_entry_micromips_o32[];
- static const uint32_t plt0_entry_micromips32_o32[];
- // Template for subsequent PLT entries.
- static const uint32_t plt_entry[];
- static const uint32_t plt_entry_r6[];
- static const uint32_t plt_entry_mips16_o32[];
- static const uint32_t plt_entry_micromips_o32[];
- static const uint32_t plt_entry_micromips32_o32[];
- // Set the final size.
- void
- set_final_data_size()
- {
- this->set_data_size(this->plt_header_size_ + this->plt_mips_offset_
- + this->plt_comp_offset_);
- }
- // Write out the PLT data.
- void
- do_write(Output_file*);
- // Return whether the plt header contains microMIPS code. For the sake of
- // cache alignment always use a standard header whenever any standard entries
- // are present even if microMIPS entries are present as well. This also lets
- // the microMIPS header rely on the value of $v0 only set by microMIPS
- // entries, for a small size reduction.
- bool
- is_plt_header_compressed() const
- {
- gold_assert(this->plt_mips_offset_ + this->plt_comp_offset_ != 0);
- return this->target_->is_output_micromips() && this->plt_mips_offset_ == 0;
- }
- // Return the size of the PLT header.
- unsigned int
- get_plt_header_size() const
- {
- if (this->target_->is_output_n64())
- return 4 * sizeof(plt0_entry_n64) / sizeof(plt0_entry_n64[0]);
- else if (this->target_->is_output_n32())
- return 4 * sizeof(plt0_entry_n32) / sizeof(plt0_entry_n32[0]);
- else if (!this->is_plt_header_compressed())
- return 4 * sizeof(plt0_entry_o32) / sizeof(plt0_entry_o32[0]);
- else if (this->target_->use_32bit_micromips_instructions())
- return (2 * sizeof(plt0_entry_micromips32_o32)
- / sizeof(plt0_entry_micromips32_o32[0]));
- else
- return (2 * sizeof(plt0_entry_micromips_o32)
- / sizeof(plt0_entry_micromips_o32[0]));
- }
- // Return the PLT header entry.
- const uint32_t*
- get_plt_header_entry() const
- {
- if (this->target_->is_output_n64())
- return plt0_entry_n64;
- else if (this->target_->is_output_n32())
- return plt0_entry_n32;
- else if (!this->is_plt_header_compressed())
- return plt0_entry_o32;
- else if (this->target_->use_32bit_micromips_instructions())
- return plt0_entry_micromips32_o32;
- else
- return plt0_entry_micromips_o32;
- }
- // Return the size of the standard PLT entry.
- unsigned int
- standard_plt_entry_size() const
- { return 4 * sizeof(plt_entry) / sizeof(plt_entry[0]); }
- // Return the size of the compressed PLT entry.
- unsigned int
- compressed_plt_entry_size() const
- {
- gold_assert(!this->target_->is_output_newabi());
- if (!this->target_->is_output_micromips())
- return (2 * sizeof(plt_entry_mips16_o32)
- / sizeof(plt_entry_mips16_o32[0]));
- else if (this->target_->use_32bit_micromips_instructions())
- return (2 * sizeof(plt_entry_micromips32_o32)
- / sizeof(plt_entry_micromips32_o32[0]));
- else
- return (2 * sizeof(plt_entry_micromips_o32)
- / sizeof(plt_entry_micromips_o32[0]));
- }
- // The reloc section.
- Reloc_section* rel_;
- // The .got.plt section.
- Output_data_space* got_plt_;
- // Symbols that have PLT entry.
- std::vector<Mips_symbol<size>*> symbols_;
- // The offset of the next standard PLT entry to create.
- unsigned int plt_mips_offset_;
- // The offset of the next compressed PLT entry to create.
- unsigned int plt_comp_offset_;
- // The size of the PLT header in bytes.
- unsigned int plt_header_size_;
- // The target.
- Target_mips<size, big_endian>* target_;
- };
- // A class to handle the .MIPS.stubs data.
- template<int size, bool big_endian>
- class Mips_output_data_mips_stubs : public Output_section_data
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- // Unordered set of .MIPS.stubs entries.
- typedef Unordered_set<Mips_symbol<size>*, Mips_symbol_hash<size> >
- Mips_stubs_entry_set;
- public:
- Mips_output_data_mips_stubs(Target_mips<size, big_endian>* target)
- : Output_section_data(size == 32 ? 4 : 8), symbols_(), dynsym_count_(-1U),
- stub_offsets_are_set_(false), target_(target)
- { }
- // Create entry for a symbol.
- void
- make_entry(Mips_symbol<size>*);
- // Remove entry for a symbol.
- void
- remove_entry(Mips_symbol<size>* gsym);
- // Set stub offsets for symbols. This method expects that the number of
- // entries in dynamic symbol table is set.
- void
- set_lazy_stub_offsets();
- void
- set_needs_dynsym_value();
- // Set the number of entries in dynamic symbol table.
- void
- set_dynsym_count(unsigned int dynsym_count)
- { this->dynsym_count_ = dynsym_count; }
- // Return maximum size of the stub, ie. the stub size if the dynamic symbol
- // count is greater than 0x10000. If the dynamic symbol count is less than
- // 0x10000, the stub will be 4 bytes smaller.
- // There's no disadvantage from using microMIPS code here, so for the sake of
- // pure-microMIPS binaries we prefer it whenever there's any microMIPS code in
- // output produced at all. This has a benefit of stubs being shorter by
- // 4 bytes each too, unless in the insn32 mode.
- unsigned int
- stub_max_size() const
- {
- if (!this->target_->is_output_micromips()
- || this->target_->use_32bit_micromips_instructions())
- return 20;
- else
- return 16;
- }
- // Return the size of the stub. This method expects that the final dynsym
- // count is set.
- unsigned int
- stub_size() const
- {
- gold_assert(this->dynsym_count_ != -1U);
- if (this->dynsym_count_ > 0x10000)
- return this->stub_max_size();
- else
- return this->stub_max_size() - 4;
- }
- // Return output address of a stub.
- Mips_address
- stub_address(const Mips_symbol<size>* sym) const
- {
- gold_assert(sym->has_lazy_stub());
- return this->address() + sym->lazy_stub_offset();
- }
- protected:
- void
- do_adjust_output_section(Output_section* os)
- { os->set_entsize(0); }
- // Write to a map file.
- void
- do_print_to_mapfile(Mapfile* mapfile) const
- { mapfile->print_output_data(this, _(".MIPS.stubs")); }
- private:
- static const uint32_t lazy_stub_normal_1[];
- static const uint32_t lazy_stub_normal_1_n64[];
- static const uint32_t lazy_stub_normal_2[];
- static const uint32_t lazy_stub_normal_2_n64[];
- static const uint32_t lazy_stub_big[];
- static const uint32_t lazy_stub_big_n64[];
- static const uint32_t lazy_stub_micromips_normal_1[];
- static const uint32_t lazy_stub_micromips_normal_1_n64[];
- static const uint32_t lazy_stub_micromips_normal_2[];
- static const uint32_t lazy_stub_micromips_normal_2_n64[];
- static const uint32_t lazy_stub_micromips_big[];
- static const uint32_t lazy_stub_micromips_big_n64[];
- static const uint32_t lazy_stub_micromips32_normal_1[];
- static const uint32_t lazy_stub_micromips32_normal_1_n64[];
- static const uint32_t lazy_stub_micromips32_normal_2[];
- static const uint32_t lazy_stub_micromips32_normal_2_n64[];
- static const uint32_t lazy_stub_micromips32_big[];
- static const uint32_t lazy_stub_micromips32_big_n64[];
- // Set the final size.
- void
- set_final_data_size()
- { this->set_data_size(this->symbols_.size() * this->stub_max_size()); }
- // Write out the .MIPS.stubs data.
- void
- do_write(Output_file*);
- // .MIPS.stubs symbols
- Mips_stubs_entry_set symbols_;
- // Number of entries in dynamic symbol table.
- unsigned int dynsym_count_;
- // Whether the stub offsets are set.
- bool stub_offsets_are_set_;
- // The target.
- Target_mips<size, big_endian>* target_;
- };
- // This class handles Mips .reginfo output section.
- template<int size, bool big_endian>
- class Mips_output_section_reginfo : public Output_section_data
- {
- typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype;
- public:
- Mips_output_section_reginfo(Target_mips<size, big_endian>* target,
- Valtype gprmask, Valtype cprmask1,
- Valtype cprmask2, Valtype cprmask3,
- Valtype cprmask4)
- : Output_section_data(24, 4, true), target_(target),
- gprmask_(gprmask), cprmask1_(cprmask1), cprmask2_(cprmask2),
- cprmask3_(cprmask3), cprmask4_(cprmask4)
- { }
- protected:
- // Write to a map file.
- void
- do_print_to_mapfile(Mapfile* mapfile) const
- { mapfile->print_output_data(this, _(".reginfo")); }
- // Write out reginfo section.
- void
- do_write(Output_file* of);
- private:
- Target_mips<size, big_endian>* target_;
- // gprmask of the output .reginfo section.
- Valtype gprmask_;
- // cprmask1 of the output .reginfo section.
- Valtype cprmask1_;
- // cprmask2 of the output .reginfo section.
- Valtype cprmask2_;
- // cprmask3 of the output .reginfo section.
- Valtype cprmask3_;
- // cprmask4 of the output .reginfo section.
- Valtype cprmask4_;
- };
- // This class handles .MIPS.options output section.
- template<int size, bool big_endian>
- class Mips_output_section_options : public Output_section
- {
- public:
- Mips_output_section_options(const char* name, elfcpp::Elf_Word type,
- elfcpp::Elf_Xword flags,
- Target_mips<size, big_endian>* target)
- : Output_section(name, type, flags), target_(target)
- {
- // After the input sections are written, we only need to update
- // ri_gp_value field of ODK_REGINFO entries.
- this->set_after_input_sections();
- }
- protected:
- // Write out option section.
- void
- do_write(Output_file* of);
- private:
- Target_mips<size, big_endian>* target_;
- };
- // This class handles .MIPS.abiflags output section.
- template<int size, bool big_endian>
- class Mips_output_section_abiflags : public Output_section_data
- {
- public:
- Mips_output_section_abiflags(const Mips_abiflags<big_endian>& abiflags)
- : Output_section_data(24, 8, true), abiflags_(abiflags)
- { }
- protected:
- // Write to a map file.
- void
- do_print_to_mapfile(Mapfile* mapfile) const
- { mapfile->print_output_data(this, _(".MIPS.abiflags")); }
- void
- do_write(Output_file* of);
- private:
- const Mips_abiflags<big_endian>& abiflags_;
- };
- // The MIPS target has relocation types which default handling of relocatable
- // relocation cannot process. So we have to extend the default code.
- template<bool big_endian, typename Classify_reloc>
- class Mips_scan_relocatable_relocs :
- public Default_scan_relocatable_relocs<Classify_reloc>
- {
- public:
- // Return the strategy to use for a local symbol which is a section
- // symbol, given the relocation type.
- inline Relocatable_relocs::Reloc_strategy
- local_section_strategy(unsigned int r_type, Relobj* object)
- {
- if (Classify_reloc::sh_type == elfcpp::SHT_RELA)
- return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
- else
- {
- switch (r_type)
- {
- case elfcpp::R_MIPS_26:
- return Relocatable_relocs::RELOC_SPECIAL;
- default:
- return Default_scan_relocatable_relocs<Classify_reloc>::
- local_section_strategy(r_type, object);
- }
- }
- }
- };
- // Mips_copy_relocs class. The only difference from the base class is the
- // method emit_mips, which should be called instead of Copy_reloc_entry::emit.
- // Mips cannot convert all relocation types to dynamic relocs. If a reloc
- // cannot be made dynamic, a COPY reloc is emitted.
- template<int sh_type, int size, bool big_endian>
- class Mips_copy_relocs : public Copy_relocs<sh_type, size, big_endian>
- {
- public:
- Mips_copy_relocs()
- : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_MIPS_COPY)
- { }
- // Emit any saved relocations which turn out to be needed. This is
- // called after all the relocs have been scanned.
- void
- emit_mips(Output_data_reloc<sh_type, true, size, big_endian>*,
- Symbol_table*, Layout*, Target_mips<size, big_endian>*);
- private:
- typedef typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry
- Copy_reloc_entry;
- // Emit this reloc if appropriate. This is called after we have
- // scanned all the relocations, so we know whether we emitted a
- // COPY relocation for SYM_.
- void
- emit_entry(Copy_reloc_entry& entry,
- Output_data_reloc<sh_type, true, size, big_endian>* reloc_section,
- Symbol_table* symtab, Layout* layout,
- Target_mips<size, big_endian>* target);
- };
- // Return true if the symbol SYM should be considered to resolve local
- // to the current module, and false otherwise. The logic is taken from
- // GNU ld's method _bfd_elf_symbol_refs_local_p.
- static bool
- symbol_refs_local(const Symbol* sym, bool has_dynsym_entry,
- bool local_protected)
- {
- // If it's a local sym, of course we resolve locally.
- if (sym == NULL)
- return true;
- // STV_HIDDEN or STV_INTERNAL ones must be local.
- if (sym->visibility() == elfcpp::STV_HIDDEN
- || sym->visibility() == elfcpp::STV_INTERNAL)
- return true;
- // If we don't have a definition in a regular file, then we can't
- // resolve locally. The sym is either undefined or dynamic.
- if (sym->is_from_dynobj() || sym->is_undefined())
- return false;
- // Forced local symbols resolve locally.
- if (sym->is_forced_local())
- return true;
- // As do non-dynamic symbols.
- if (!has_dynsym_entry)
- return true;
- // At this point, we know the symbol is defined and dynamic. In an
- // executable it must resolve locally, likewise when building symbolic
- // shared libraries.
- if (parameters->options().output_is_executable()
- || parameters->options().Bsymbolic())
- return true;
- // Now deal with defined dynamic symbols in shared libraries. Ones
- // with default visibility might not resolve locally.
- if (sym->visibility() == elfcpp::STV_DEFAULT)
- return false;
- // STV_PROTECTED non-function symbols are local.
- if (sym->type() != elfcpp::STT_FUNC)
- return true;
- // Function pointer equality tests may require that STV_PROTECTED
- // symbols be treated as dynamic symbols. If the address of a
- // function not defined in an executable is set to that function's
- // plt entry in the executable, then the address of the function in
- // a shared library must also be the plt entry in the executable.
- return local_protected;
- }
- // Return TRUE if references to this symbol always reference the symbol in this
- // object.
- static bool
- symbol_references_local(const Symbol* sym, bool has_dynsym_entry)
- {
- return symbol_refs_local(sym, has_dynsym_entry, false);
- }
- // Return TRUE if calls to this symbol always call the version in this object.
- static bool
- symbol_calls_local(const Symbol* sym, bool has_dynsym_entry)
- {
- return symbol_refs_local(sym, has_dynsym_entry, true);
- }
- // Compare GOT offsets of two symbols.
- template<int size, bool big_endian>
- static bool
- got_offset_compare(Symbol* sym1, Symbol* sym2)
- {
- Mips_symbol<size>* mips_sym1 = Mips_symbol<size>::as_mips_sym(sym1);
- Mips_symbol<size>* mips_sym2 = Mips_symbol<size>::as_mips_sym(sym2);
- unsigned int area1 = mips_sym1->global_got_area();
- unsigned int area2 = mips_sym2->global_got_area();
- gold_assert(area1 != GGA_NONE && area1 != GGA_NONE);
- // GGA_NORMAL entries always come before GGA_RELOC_ONLY.
- if (area1 != area2)
- return area1 < area2;
- return mips_sym1->global_gotoffset() < mips_sym2->global_gotoffset();
- }
- // This method divides dynamic symbols into symbols that have GOT entry, and
- // symbols that don't have GOT entry. It also sorts symbols with the GOT entry.
- // Mips ABI requires that symbols with the GOT entry must be at the end of
- // dynamic symbol table, and the order in dynamic symbol table must match the
- // order in GOT.
- template<int size, bool big_endian>
- static void
- reorder_dyn_symbols(std::vector<Symbol*>* dyn_symbols,
- std::vector<Symbol*>* non_got_symbols,
- std::vector<Symbol*>* got_symbols)
- {
- for (std::vector<Symbol*>::iterator p = dyn_symbols->begin();
- p != dyn_symbols->end();
- ++p)
- {
- Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(*p);
- if (mips_sym->global_got_area() == GGA_NORMAL
- || mips_sym->global_got_area() == GGA_RELOC_ONLY)
- got_symbols->push_back(mips_sym);
- else
- non_got_symbols->push_back(mips_sym);
- }
- std::sort(got_symbols->begin(), got_symbols->end(),
- got_offset_compare<size, big_endian>);
- }
- // Functor class for processing the global symbol table.
- template<int size, bool big_endian>
- class Symbol_visitor_check_symbols
- {
- public:
- Symbol_visitor_check_symbols(Target_mips<size, big_endian>* target,
- Layout* layout, Symbol_table* symtab)
- : target_(target), layout_(layout), symtab_(symtab)
- { }
- void
- operator()(Sized_symbol<size>* sym)
- {
- Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(sym);
- if (local_pic_function<size, big_endian>(mips_sym))
- {
- // SYM is a function that might need $25 to be valid on entry.
- // If we're creating a non-PIC relocatable object, mark SYM as
- // being PIC. If we're creating a non-relocatable object with
- // non-PIC branches and jumps to SYM, make sure that SYM has an la25
- // stub.
- if (parameters->options().relocatable())
- {
- if (!parameters->options().output_is_position_independent())
- mips_sym->set_pic();
- }
- else if (mips_sym->has_nonpic_branches())
- {
- this->target_->la25_stub_section(layout_)
- ->create_la25_stub(this->symtab_, this->target_, mips_sym);
- }
- }
- }
- private:
- Target_mips<size, big_endian>* target_;
- Layout* layout_;
- Symbol_table* symtab_;
- };
- // Relocation types, parameterized by SHT_REL vs. SHT_RELA, size,
- // and endianness. The relocation format for MIPS-64 is non-standard.
- template<int sh_type, int size, bool big_endian>
- struct Mips_reloc_types;
- template<bool big_endian>
- struct Mips_reloc_types<elfcpp::SHT_REL, 32, big_endian>
- {
- typedef typename elfcpp::Rel<32, big_endian> Reloc;
- typedef typename elfcpp::Rel_write<32, big_endian> Reloc_write;
- static typename elfcpp::Elf_types<32>::Elf_Swxword
- get_r_addend(const Reloc*)
- { return 0; }
- static inline void
- set_reloc_addend(Reloc_write*,
- typename elfcpp::Elf_types<32>::Elf_Swxword)
- { gold_unreachable(); }
- };
- template<bool big_endian>
- struct Mips_reloc_types<elfcpp::SHT_RELA, 32, big_endian>
- {
- typedef typename elfcpp::Rela<32, big_endian> Reloc;
- typedef typename elfcpp::Rela_write<32, big_endian> Reloc_write;
- static typename elfcpp::Elf_types<32>::Elf_Swxword
- get_r_addend(const Reloc* reloc)
- { return reloc->get_r_addend(); }
- static inline void
- set_reloc_addend(Reloc_write* p,
- typename elfcpp::Elf_types<32>::Elf_Swxword val)
- { p->put_r_addend(val); }
- };
- template<bool big_endian>
- struct Mips_reloc_types<elfcpp::SHT_REL, 64, big_endian>
- {
- typedef typename elfcpp::Mips64_rel<big_endian> Reloc;
- typedef typename elfcpp::Mips64_rel_write<big_endian> Reloc_write;
- static typename elfcpp::Elf_types<64>::Elf_Swxword
- get_r_addend(const Reloc*)
- { return 0; }
- static inline void
- set_reloc_addend(Reloc_write*,
- typename elfcpp::Elf_types<64>::Elf_Swxword)
- { gold_unreachable(); }
- };
- template<bool big_endian>
- struct Mips_reloc_types<elfcpp::SHT_RELA, 64, big_endian>
- {
- typedef typename elfcpp::Mips64_rela<big_endian> Reloc;
- typedef typename elfcpp::Mips64_rela_write<big_endian> Reloc_write;
- static typename elfcpp::Elf_types<64>::Elf_Swxword
- get_r_addend(const Reloc* reloc)
- { return reloc->get_r_addend(); }
- static inline void
- set_reloc_addend(Reloc_write* p,
- typename elfcpp::Elf_types<64>::Elf_Swxword val)
- { p->put_r_addend(val); }
- };
- // Forward declaration.
- static unsigned int
- mips_get_size_for_reloc(unsigned int, Relobj*);
- // A class for inquiring about properties of a relocation,
- // used while scanning relocs during a relocatable link and
- // garbage collection.
- template<int sh_type_, int size, bool big_endian>
- class Mips_classify_reloc;
- template<int sh_type_, bool big_endian>
- class Mips_classify_reloc<sh_type_, 32, big_endian> :
- public gold::Default_classify_reloc<sh_type_, 32, big_endian>
- {
- public:
- typedef typename Mips_reloc_types<sh_type_, 32, big_endian>::Reloc
- Reltype;
- typedef typename Mips_reloc_types<sh_type_, 32, big_endian>::Reloc_write
- Reltype_write;
- // Return the symbol referred to by the relocation.
- static inline unsigned int
- get_r_sym(const Reltype* reloc)
- { return elfcpp::elf_r_sym<32>(reloc->get_r_info()); }
- // Return the type of the relocation.
- static inline unsigned int
- get_r_type(const Reltype* reloc)
- { return elfcpp::elf_r_type<32>(reloc->get_r_info()); }
- static inline unsigned int
- get_r_type2(const Reltype*)
- { return 0; }
- static inline unsigned int
- get_r_type3(const Reltype*)
- { return 0; }
- static inline unsigned int
- get_r_ssym(const Reltype*)
- { return 0; }
- // Return the explicit addend of the relocation (return 0 for SHT_REL).
- static inline unsigned int
- get_r_addend(const Reltype* reloc)
- {
- if (sh_type_ == elfcpp::SHT_REL)
- return 0;
- return Mips_reloc_types<sh_type_, 32, big_endian>::get_r_addend(reloc);
- }
- // Write the r_info field to a new reloc, using the r_info field from
- // the original reloc, replacing the r_sym field with R_SYM.
- static inline void
- put_r_info(Reltype_write* new_reloc, Reltype* reloc, unsigned int r_sym)
- {
- unsigned int r_type = elfcpp::elf_r_type<32>(reloc->get_r_info());
- new_reloc->put_r_info(elfcpp::elf_r_info<32>(r_sym, r_type));
- }
- // Write the r_addend field to a new reloc.
- static inline void
- put_r_addend(Reltype_write* to,
- typename elfcpp::Elf_types<32>::Elf_Swxword addend)
- { Mips_reloc_types<sh_type_, 32, big_endian>::set_reloc_addend(to, addend); }
- // Return the size of the addend of the relocation (only used for SHT_REL).
- static unsigned int
- get_size_for_reloc(unsigned int r_type, Relobj* obj)
- { return mips_get_size_for_reloc(r_type, obj); }
- };
- template<int sh_type_, bool big_endian>
- class Mips_classify_reloc<sh_type_, 64, big_endian> :
- public gold::Default_classify_reloc<sh_type_, 64, big_endian>
- {
- public:
- typedef typename Mips_reloc_types<sh_type_, 64, big_endian>::Reloc
- Reltype;
- typedef typename Mips_reloc_types<sh_type_, 64, big_endian>::Reloc_write
- Reltype_write;
- // Return the symbol referred to by the relocation.
- static inline unsigned int
- get_r_sym(const Reltype* reloc)
- { return reloc->get_r_sym(); }
- // Return the r_type of the relocation.
- static inline unsigned int
- get_r_type(const Reltype* reloc)
- { return reloc->get_r_type(); }
- // Return the r_type2 of the relocation.
- static inline unsigned int
- get_r_type2(const Reltype* reloc)
- { return reloc->get_r_type2(); }
- // Return the r_type3 of the relocation.
- static inline unsigned int
- get_r_type3(const Reltype* reloc)
- { return reloc->get_r_type3(); }
- // Return the special symbol of the relocation.
- static inline unsigned int
- get_r_ssym(const Reltype* reloc)
- { return reloc->get_r_ssym(); }
- // Return the explicit addend of the relocation (return 0 for SHT_REL).
- static inline typename elfcpp::Elf_types<64>::Elf_Swxword
- get_r_addend(const Reltype* reloc)
- {
- if (sh_type_ == elfcpp::SHT_REL)
- return 0;
- return Mips_reloc_types<sh_type_, 64, big_endian>::get_r_addend(reloc);
- }
- // Write the r_info field to a new reloc, using the r_info field from
- // the original reloc, replacing the r_sym field with R_SYM.
- static inline void
- put_r_info(Reltype_write* new_reloc, Reltype* reloc, unsigned int r_sym)
- {
- new_reloc->put_r_sym(r_sym);
- new_reloc->put_r_ssym(reloc->get_r_ssym());
- new_reloc->put_r_type3(reloc->get_r_type3());
- new_reloc->put_r_type2(reloc->get_r_type2());
- new_reloc->put_r_type(reloc->get_r_type());
- }
- // Write the r_addend field to a new reloc.
- static inline void
- put_r_addend(Reltype_write* to,
- typename elfcpp::Elf_types<64>::Elf_Swxword addend)
- { Mips_reloc_types<sh_type_, 64, big_endian>::set_reloc_addend(to, addend); }
- // Return the size of the addend of the relocation (only used for SHT_REL).
- static unsigned int
- get_size_for_reloc(unsigned int r_type, Relobj* obj)
- { return mips_get_size_for_reloc(r_type, obj); }
- };
- template<int size, bool big_endian>
- class Target_mips : public Sized_target<size, big_endian>
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- typedef Mips_output_data_reloc<elfcpp::SHT_REL, true, size, big_endian>
- Reloc_section;
- typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32;
- typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype;
- typedef typename Mips_reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc
- Reltype;
- typedef typename Mips_reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
- Relatype;
- public:
- Target_mips(const Target::Target_info* info = &mips_info)
- : Sized_target<size, big_endian>(info), got_(NULL), gp_(NULL), plt_(NULL),
- got_plt_(NULL), rel_dyn_(NULL), rld_map_(NULL), copy_relocs_(),
- dyn_relocs_(), la25_stub_(NULL), mips_mach_extensions_(),
- mips_stubs_(NULL), attributes_section_data_(NULL), abiflags_(NULL),
- mach_(0), layout_(NULL), got16_addends_(), has_abiflags_section_(false),
- entry_symbol_is_compressed_(false), insn32_(false)
- {
- this->add_machine_extensions();
- }
- // The offset of $gp from the beginning of the .got section.
- static const unsigned int MIPS_GP_OFFSET = 0x7ff0;
- // The maximum size of the GOT for it to be addressable using 16-bit
- // offsets from $gp.
- static const unsigned int MIPS_GOT_MAX_SIZE = MIPS_GP_OFFSET + 0x7fff;
- // Make a new symbol table entry for the Mips target.
- Sized_symbol<size>*
- make_symbol(const char*, elfcpp::STT, Object*, unsigned int, uint64_t)
- { return new Mips_symbol<size>(); }
- // Process the relocations to determine unreferenced sections for
- // garbage collection.
- void
- gc_process_relocs(Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- size_t local_symbol_count,
- const unsigned char* plocal_symbols);
- // Scan the relocations to look for symbol adjustments.
- void
- scan_relocs(Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- size_t local_symbol_count,
- const unsigned char* plocal_symbols);
- // Finalize the sections.
- void
- do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
- // Relocate a section.
- void
- relocate_section(const Relocate_info<size, big_endian>*,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- unsigned char* view,
- Mips_address view_address,
- section_size_type view_size,
- const Reloc_symbol_changes*);
- // Scan the relocs during a relocatable link.
- void
- scan_relocatable_relocs(Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- size_t local_symbol_count,
- const unsigned char* plocal_symbols,
- Relocatable_relocs*);
- // Scan the relocs for --emit-relocs.
- void
- emit_relocs_scan(Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- size_t local_symbol_count,
- const unsigned char* plocal_syms,
- Relocatable_relocs* rr);
- // Emit relocations for a section.
- void
- relocate_relocs(const Relocate_info<size, big_endian>*,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- typename elfcpp::Elf_types<size>::Elf_Off
- offset_in_output_section,
- unsigned char* view,
- Mips_address view_address,
- section_size_type view_size,
- unsigned char* reloc_view,
- section_size_type reloc_view_size);
- // Perform target-specific processing in a relocatable link. This is
- // only used if we use the relocation strategy RELOC_SPECIAL.
- void
- relocate_special_relocatable(const Relocate_info<size, big_endian>* relinfo,
- unsigned int sh_type,
- const unsigned char* preloc_in,
- size_t relnum,
- Output_section* output_section,
- typename elfcpp::Elf_types<size>::Elf_Off
- offset_in_output_section,
- unsigned char* view,
- Mips_address view_address,
- section_size_type view_size,
- unsigned char* preloc_out);
- // Return whether SYM is defined by the ABI.
- bool
- do_is_defined_by_abi(const Symbol* sym) const
- {
- return ((strcmp(sym->name(), "__gnu_local_gp") == 0)
- || (strcmp(sym->name(), "_gp_disp") == 0)
- || (strcmp(sym->name(), "___tls_get_addr") == 0));
- }
- // Return the number of entries in the GOT.
- unsigned int
- got_entry_count() const
- {
- if (!this->has_got_section())
- return 0;
- return this->got_size() / (size/8);
- }
- // Return the number of entries in the PLT.
- unsigned int
- plt_entry_count() const
- {
- if (this->plt_ == NULL)
- return 0;
- return this->plt_->entry_count();
- }
- // Return the offset of the first non-reserved PLT entry.
- unsigned int
- first_plt_entry_offset() const
- { return this->plt_->first_plt_entry_offset(); }
- // Return the size of each PLT entry.
- unsigned int
- plt_entry_size() const
- { return this->plt_->plt_entry_size(); }
- // Get the GOT section, creating it if necessary.
- Mips_output_data_got<size, big_endian>*
- got_section(Symbol_table*, Layout*);
- // Get the GOT section.
- Mips_output_data_got<size, big_endian>*
- got_section() const
- {
- gold_assert(this->got_ != NULL);
- return this->got_;
- }
- // Get the .MIPS.stubs section, creating it if necessary.
- Mips_output_data_mips_stubs<size, big_endian>*
- mips_stubs_section(Layout* layout);
- // Get the .MIPS.stubs section.
- Mips_output_data_mips_stubs<size, big_endian>*
- mips_stubs_section() const
- {
- gold_assert(this->mips_stubs_ != NULL);
- return this->mips_stubs_;
- }
- // Get the LA25 stub section, creating it if necessary.
- Mips_output_data_la25_stub<size, big_endian>*
- la25_stub_section(Layout*);
- // Get the LA25 stub section.
- Mips_output_data_la25_stub<size, big_endian>*
- la25_stub_section()
- {
- gold_assert(this->la25_stub_ != NULL);
- return this->la25_stub_;
- }
- // Get gp value. It has the value of .got + 0x7FF0.
- Mips_address
- gp_value() const
- {
- if (this->gp_ != NULL)
- return this->gp_->value();
- return 0;
- }
- // Get gp value. It has the value of .got + 0x7FF0. Adjust it for
- // multi-GOT links so that OBJECT's GOT + 0x7FF0 is returned.
- Mips_address
- adjusted_gp_value(const Mips_relobj<size, big_endian>* object)
- {
- if (this->gp_ == NULL)
- return 0;
- bool multi_got = false;
- if (this->has_got_section())
- multi_got = this->got_section()->multi_got();
- if (!multi_got)
- return this->gp_->value();
- else
- return this->gp_->value() + this->got_section()->get_got_offset(object);
- }
- // Get the dynamic reloc section, creating it if necessary.
- Reloc_section*
- rel_dyn_section(Layout*);
- bool
- do_has_custom_set_dynsym_indexes() const
- { return true; }
- // Don't emit input .reginfo/.MIPS.abiflags sections to
- // output .reginfo/.MIPS.abiflags.
- bool
- do_should_include_section(elfcpp::Elf_Word sh_type) const
- {
- return ((sh_type != elfcpp::SHT_MIPS_REGINFO)
- && (sh_type != elfcpp::SHT_MIPS_ABIFLAGS));
- }
- // Set the dynamic symbol indexes. INDEX is the index of the first
- // global dynamic symbol. Pointers to the symbols are stored into the
- // vector SYMS. The names are added to DYNPOOL. This returns an
- // updated dynamic symbol index.
- unsigned int
- do_set_dynsym_indexes(std::vector<Symbol*>* dyn_symbols, unsigned int index,
- std::vector<Symbol*>* syms, Stringpool* dynpool,
- Versions* versions, Symbol_table* symtab) const;
- // Remove .MIPS.stubs entry for a symbol.
- void
- remove_lazy_stub_entry(Mips_symbol<size>* sym)
- {
- if (this->mips_stubs_ != NULL)
- this->mips_stubs_->remove_entry(sym);
- }
- // The value to write into got[1] for SVR4 targets, to identify it is
- // a GNU object. The dynamic linker can then use got[1] to store the
- // module pointer.
- uint64_t
- mips_elf_gnu_got1_mask()
- {
- if (this->is_output_n64())
- return (uint64_t)1 << 63;
- else
- return 1 << 31;
- }
- // Whether the output has microMIPS code. This is valid only after
- // merge_obj_e_flags() is called.
- bool
- is_output_micromips() const
- {
- gold_assert(this->are_processor_specific_flags_set());
- return elfcpp::is_micromips(this->processor_specific_flags());
- }
- // Whether the output uses N32 ABI. This is valid only after
- // merge_obj_e_flags() is called.
- bool
- is_output_n32() const
- {
- gold_assert(this->are_processor_specific_flags_set());
- return elfcpp::abi_n32(this->processor_specific_flags());
- }
- // Whether the output uses R6 ISA. This is valid only after
- // merge_obj_e_flags() is called.
- bool
- is_output_r6() const
- {
- gold_assert(this->are_processor_specific_flags_set());
- return elfcpp::r6_isa(this->processor_specific_flags());
- }
- // Whether the output uses N64 ABI.
- bool
- is_output_n64() const
- { return size == 64; }
- // Whether the output uses NEWABI. This is valid only after
- // merge_obj_e_flags() is called.
- bool
- is_output_newabi() const
- { return this->is_output_n32() || this->is_output_n64(); }
- // Whether we can only use 32-bit microMIPS instructions.
- bool
- use_32bit_micromips_instructions() const
- { return this->insn32_; }
- // Return the r_sym field from a relocation.
- unsigned int
- get_r_sym(const unsigned char* preloc) const
- {
- // Since REL and RELA relocs share the same structure through
- // the r_info field, we can just use REL here.
- Reltype rel(preloc);
- return Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>::
- get_r_sym(&rel);
- }
- protected:
- // Return the value to use for a dynamic symbol which requires special
- // treatment. This is how we support equality comparisons of function
- // pointers across shared library boundaries, as described in the
- // processor specific ABI supplement.
- uint64_t
- do_dynsym_value(const Symbol* gsym) const;
- // Make an ELF object.
- Object*
- do_make_elf_object(const std::string&, Input_file*, off_t,
- const elfcpp::Ehdr<size, big_endian>& ehdr);
- Object*
- do_make_elf_object(const std::string&, Input_file*, off_t,
- const elfcpp::Ehdr<size, !big_endian>&)
- { gold_unreachable(); }
- // Make an output section.
- Output_section*
- do_make_output_section(const char* name, elfcpp::Elf_Word type,
- elfcpp::Elf_Xword flags)
- {
- if (type == elfcpp::SHT_MIPS_OPTIONS)
- return new Mips_output_section_options<size, big_endian>(name, type,
- flags, this);
- else
- return new Output_section(name, type, flags);
- }
- // Adjust ELF file header.
- void
- do_adjust_elf_header(unsigned char* view, int len);
- // Get the custom dynamic tag value.
- unsigned int
- do_dynamic_tag_custom_value(elfcpp::DT) const;
- // Adjust the value written to the dynamic symbol table.
- virtual void
- do_adjust_dyn_symbol(const Symbol* sym, unsigned char* view) const
- {
- elfcpp::Sym<size, big_endian> isym(view);
- elfcpp::Sym_write<size, big_endian> osym(view);
- const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(sym);
- // Keep dynamic compressed symbols odd. This allows the dynamic linker
- // to treat compressed symbols like any other.
- Mips_address value = isym.get_st_value();
- if (mips_sym->is_mips16() && value != 0)
- {
- if (!mips_sym->has_mips16_fn_stub())
- value |= 1;
- else
- {
- // If we have a MIPS16 function with a stub, the dynamic symbol
- // must refer to the stub, since only the stub uses the standard
- // calling conventions. Stub contains MIPS32 code, so don't add +1
- // in this case.
- // There is a code which does this in the method
- // Target_mips::do_dynsym_value, but that code will only be
- // executed if the symbol is from dynobj.
- // TODO(sasa): GNU ld also changes the value in non-dynamic symbol
- // table.
- Mips16_stub_section<size, big_endian>* fn_stub =
- mips_sym->template get_mips16_fn_stub<big_endian>();
- value = fn_stub->output_address();
- osym.put_st_size(fn_stub->section_size());
- }
- osym.put_st_value(value);
- osym.put_st_other(elfcpp::elf_st_other(sym->visibility(),
- mips_sym->nonvis() - (elfcpp::STO_MIPS16 >> 2)));
- }
- else if ((mips_sym->is_micromips()
- // Stubs are always microMIPS if there is any microMIPS code in
- // the output.
- || (this->is_output_micromips() && mips_sym->has_lazy_stub()))
- && value != 0)
- {
- osym.put_st_value(value | 1);
- osym.put_st_other(elfcpp::elf_st_other(sym->visibility(),
- mips_sym->nonvis() - (elfcpp::STO_MICROMIPS >> 2)));
- }
- }
- private:
- // The class which scans relocations.
- class Scan
- {
- public:
- Scan()
- { }
- static inline int
- get_reference_flags(unsigned int r_type);
- inline void
- local(Symbol_table* symtab, Layout* layout, Target_mips* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Reltype& reloc, unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym,
- bool is_discarded);
- inline void
- local(Symbol_table* symtab, Layout* layout, Target_mips* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Relatype& reloc, unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym,
- bool is_discarded);
- inline void
- local(Symbol_table* symtab, Layout* layout, Target_mips* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Relatype* rela,
- const Reltype* rel,
- unsigned int rel_type,
- unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym,
- bool is_discarded);
- inline void
- global(Symbol_table* symtab, Layout* layout, Target_mips* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Reltype& reloc, unsigned int r_type,
- Symbol* gsym);
- inline void
- global(Symbol_table* symtab, Layout* layout, Target_mips* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Relatype& reloc, unsigned int r_type,
- Symbol* gsym);
- inline void
- global(Symbol_table* symtab, Layout* layout, Target_mips* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Relatype* rela,
- const Reltype* rel,
- unsigned int rel_type,
- unsigned int r_type,
- Symbol* gsym);
- inline bool
- local_reloc_may_be_function_pointer(Symbol_table* , Layout*,
- Target_mips*,
- Sized_relobj_file<size, big_endian>*,
- unsigned int,
- Output_section*,
- const Reltype&,
- unsigned int,
- const elfcpp::Sym<size, big_endian>&)
- { return false; }
- inline bool
- global_reloc_may_be_function_pointer(Symbol_table*, Layout*,
- Target_mips*,
- Sized_relobj_file<size, big_endian>*,
- unsigned int,
- Output_section*,
- const Reltype&,
- unsigned int, Symbol*)
- { return false; }
- inline bool
- local_reloc_may_be_function_pointer(Symbol_table*, Layout*,
- Target_mips*,
- Sized_relobj_file<size, big_endian>*,
- unsigned int,
- Output_section*,
- const Relatype&,
- unsigned int,
- const elfcpp::Sym<size, big_endian>&)
- { return false; }
- inline bool
- global_reloc_may_be_function_pointer(Symbol_table*, Layout*,
- Target_mips*,
- Sized_relobj_file<size, big_endian>*,
- unsigned int,
- Output_section*,
- const Relatype&,
- unsigned int, Symbol*)
- { return false; }
- private:
- static void
- unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
- unsigned int r_type);
- static void
- unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
- unsigned int r_type, Symbol*);
- };
- // The class which implements relocation.
- class Relocate
- {
- public:
- Relocate()
- : calculated_value_(0), calculate_only_(false)
- { }
- ~Relocate()
- { }
- // Return whether a R_MIPS_32/R_MIPS_64 relocation needs to be applied.
- inline bool
- should_apply_static_reloc(const Mips_symbol<size>* gsym,
- unsigned int r_type,
- Output_section* output_section,
- Target_mips* target);
- // Do a relocation. Return false if the caller should not issue
- // any warnings about this relocation.
- inline bool
- relocate(const Relocate_info<size, big_endian>*, unsigned int,
- Target_mips*, Output_section*, size_t, const unsigned char*,
- const Sized_symbol<size>*, const Symbol_value<size>*,
- unsigned char*, Mips_address, section_size_type);
- private:
- // Result of the relocation.
- Valtype calculated_value_;
- // Whether we have to calculate relocation instead of applying it.
- bool calculate_only_;
- };
- // This POD class holds the dynamic relocations that should be emitted instead
- // of R_MIPS_32, R_MIPS_REL32 and R_MIPS_64 relocations. We will emit these
- // relocations if it turns out that the symbol does not have static
- // relocations.
- class Dyn_reloc
- {
- public:
- Dyn_reloc(Mips_symbol<size>* sym, unsigned int r_type,
- Mips_relobj<size, big_endian>* relobj, unsigned int shndx,
- Output_section* output_section, Mips_address r_offset)
- : sym_(sym), r_type_(r_type), relobj_(relobj),
- shndx_(shndx), output_section_(output_section),
- r_offset_(r_offset)
- { }
- // Emit this reloc if appropriate. This is called after we have
- // scanned all the relocations, so we know whether the symbol has
- // static relocations.
- void
- emit(Reloc_section* rel_dyn, Mips_output_data_got<size, big_endian>* got,
- Symbol_table* symtab)
- {
- if (!this->sym_->has_static_relocs())
- {
- got->record_global_got_symbol(this->sym_, this->relobj_,
- this->r_type_, true, false);
- if (!symbol_references_local(this->sym_,
- this->sym_->should_add_dynsym_entry(symtab)))
- rel_dyn->add_global(this->sym_, this->r_type_,
- this->output_section_, this->relobj_,
- this->shndx_, this->r_offset_);
- else
- rel_dyn->add_symbolless_global_addend(this->sym_, this->r_type_,
- this->output_section_, this->relobj_,
- this->shndx_, this->r_offset_);
- }
- }
- private:
- Mips_symbol<size>* sym_;
- unsigned int r_type_;
- Mips_relobj<size, big_endian>* relobj_;
- unsigned int shndx_;
- Output_section* output_section_;
- Mips_address r_offset_;
- };
- // Adjust TLS relocation type based on the options and whether this
- // is a local symbol.
- static tls::Tls_optimization
- optimize_tls_reloc(bool is_final, int r_type);
- // Return whether there is a GOT section.
- bool
- has_got_section() const
- { return this->got_ != NULL; }
- // Check whether the given ELF header flags describe a 32-bit binary.
- bool
- mips_32bit_flags(elfcpp::Elf_Word);
- enum Mips_mach {
- mach_mips3000 = 3000,
- mach_mips3900 = 3900,
- mach_mips4000 = 4000,
- mach_mips4010 = 4010,
- mach_mips4100 = 4100,
- mach_mips4111 = 4111,
- mach_mips4120 = 4120,
- mach_mips4300 = 4300,
- mach_mips4400 = 4400,
- mach_mips4600 = 4600,
- mach_mips4650 = 4650,
- mach_mips5000 = 5000,
- mach_mips5400 = 5400,
- mach_mips5500 = 5500,
- mach_mips5900 = 5900,
- mach_mips6000 = 6000,
- mach_mips7000 = 7000,
- mach_mips8000 = 8000,
- mach_mips9000 = 9000,
- mach_mips10000 = 10000,
- mach_mips12000 = 12000,
- mach_mips14000 = 14000,
- mach_mips16000 = 16000,
- mach_mips16 = 16,
- mach_mips5 = 5,
- mach_mips_loongson_2e = 3001,
- mach_mips_loongson_2f = 3002,
- mach_mips_gs464 = 3003,
- mach_mips_gs464e = 3004,
- mach_mips_gs264e = 3005,
- mach_mips_sb1 = 12310201, // octal 'SB', 01
- mach_mips_octeon = 6501,
- mach_mips_octeonp = 6601,
- mach_mips_octeon2 = 6502,
- mach_mips_octeon3 = 6503,
- mach_mips_xlr = 887682, // decimal 'XLR'
- mach_mipsisa32 = 32,
- mach_mipsisa32r2 = 33,
- mach_mipsisa32r3 = 34,
- mach_mipsisa32r5 = 36,
- mach_mipsisa32r6 = 37,
- mach_mipsisa64 = 64,
- mach_mipsisa64r2 = 65,
- mach_mipsisa64r3 = 66,
- mach_mipsisa64r5 = 68,
- mach_mipsisa64r6 = 69,
- mach_mips_micromips = 96
- };
- // Return the MACH for a MIPS e_flags value.
- unsigned int
- elf_mips_mach(elfcpp::Elf_Word);
- // Return the MACH for each .MIPS.abiflags ISA Extension.
- unsigned int
- mips_isa_ext_mach(unsigned int);
- // Return the .MIPS.abiflags value representing each ISA Extension.
- unsigned int
- mips_isa_ext(unsigned int);
- // Update the isa_level, isa_rev, isa_ext fields of abiflags.
- void
- update_abiflags_isa(const std::string&, elfcpp::Elf_Word,
- Mips_abiflags<big_endian>*);
- // Infer the content of the ABI flags based on the elf header.
- void
- infer_abiflags(Mips_relobj<size, big_endian>*, Mips_abiflags<big_endian>*);
- // Create abiflags from elf header or from .MIPS.abiflags section.
- void
- create_abiflags(Mips_relobj<size, big_endian>*, Mips_abiflags<big_endian>*);
- // Return the meaning of fp_abi, or "unknown" if not known.
- const char*
- fp_abi_string(int);
- // Select fp_abi.
- int
- select_fp_abi(const std::string&, int, int);
- // Merge attributes from input object.
- void
- merge_obj_attributes(const std::string&, const Attributes_section_data*);
- // Merge abiflags from input object.
- void
- merge_obj_abiflags(const std::string&, Mips_abiflags<big_endian>*);
- // Check whether machine EXTENSION is an extension of machine BASE.
- bool
- mips_mach_extends(unsigned int, unsigned int);
- // Merge file header flags from input object.
- void
- merge_obj_e_flags(const std::string&, elfcpp::Elf_Word);
- // Encode ISA level and revision as a single value.
- int
- level_rev(unsigned char isa_level, unsigned char isa_rev) const
- { return (isa_level << 3) | isa_rev; }
- // True if we are linking for CPUs that are faster if JAL is converted to BAL.
- static inline bool
- jal_to_bal()
- { return false; }
- // True if we are linking for CPUs that are faster if JALR is converted to
- // BAL. This should be safe for all architectures. We enable this predicate
- // for all CPUs.
- static inline bool
- jalr_to_bal()
- { return true; }
- // True if we are linking for CPUs that are faster if JR is converted to B.
- // This should be safe for all architectures. We enable this predicate for
- // all CPUs.
- static inline bool
- jr_to_b()
- { return true; }
- // Return the size of the GOT section.
- section_size_type
- got_size() const
- {
- gold_assert(this->got_ != NULL);
- return this->got_->data_size();
- }
- // Create a PLT entry for a global symbol referenced by r_type relocation.
- void
- make_plt_entry(Symbol_table*, Layout*, Mips_symbol<size>*,
- unsigned int r_type);
- // Get the PLT section.
- Mips_output_data_plt<size, big_endian>*
- plt_section() const
- {
- gold_assert(this->plt_ != NULL);
- return this->plt_;
- }
- // Get the GOT PLT section.
- const Mips_output_data_plt<size, big_endian>*
- got_plt_section() const
- {
- gold_assert(this->got_plt_ != NULL);
- return this->got_plt_;
- }
- // Copy a relocation against a global symbol.
- void
- copy_reloc(Symbol_table* symtab, Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int shndx, Output_section* output_section,
- Symbol* sym, unsigned int r_type, Mips_address r_offset)
- {
- this->copy_relocs_.copy_reloc(symtab, layout,
- symtab->get_sized_symbol<size>(sym),
- object, shndx, output_section,
- r_type, r_offset, 0,
- this->rel_dyn_section(layout));
- }
- void
- dynamic_reloc(Mips_symbol<size>* sym, unsigned int r_type,
- Mips_relobj<size, big_endian>* relobj,
- unsigned int shndx, Output_section* output_section,
- Mips_address r_offset)
- {
- this->dyn_relocs_.push_back(Dyn_reloc(sym, r_type, relobj, shndx,
- output_section, r_offset));
- }
- // Calculate value of _gp symbol.
- void
- set_gp(Layout*, Symbol_table*);
- const char*
- elf_mips_abi_name(elfcpp::Elf_Word e_flags);
- const char*
- elf_mips_mach_name(elfcpp::Elf_Word e_flags);
- // Adds entries that describe how machines relate to one another. The entries
- // are ordered topologically with MIPS I extensions listed last. First
- // element is extension, second element is base.
- void
- add_machine_extensions()
- {
- // MIPS64r2 extensions.
- this->add_extension(mach_mips_octeon3, mach_mips_octeon2);
- this->add_extension(mach_mips_octeon2, mach_mips_octeonp);
- this->add_extension(mach_mips_octeonp, mach_mips_octeon);
- this->add_extension(mach_mips_octeon, mach_mipsisa64r2);
- this->add_extension(mach_mips_gs264e, mach_mips_gs464e);
- this->add_extension(mach_mips_gs464e, mach_mips_gs464);
- this->add_extension(mach_mips_gs464, mach_mipsisa64r2);
- // MIPS64 extensions.
- this->add_extension(mach_mipsisa64r2, mach_mipsisa64);
- this->add_extension(mach_mips_sb1, mach_mipsisa64);
- this->add_extension(mach_mips_xlr, mach_mipsisa64);
- // MIPS V extensions.
- this->add_extension(mach_mipsisa64, mach_mips5);
- // R10000 extensions.
- this->add_extension(mach_mips12000, mach_mips10000);
- this->add_extension(mach_mips14000, mach_mips10000);
- this->add_extension(mach_mips16000, mach_mips10000);
- // R5000 extensions. Note: the vr5500 ISA is an extension of the core
- // vr5400 ISA, but doesn't include the multimedia stuff. It seems
- // better to allow vr5400 and vr5500 code to be merged anyway, since
- // many libraries will just use the core ISA. Perhaps we could add
- // some sort of ASE flag if this ever proves a problem.
- this->add_extension(mach_mips5500, mach_mips5400);
- this->add_extension(mach_mips5400, mach_mips5000);
- // MIPS IV extensions.
- this->add_extension(mach_mips5, mach_mips8000);
- this->add_extension(mach_mips10000, mach_mips8000);
- this->add_extension(mach_mips5000, mach_mips8000);
- this->add_extension(mach_mips7000, mach_mips8000);
- this->add_extension(mach_mips9000, mach_mips8000);
- // VR4100 extensions.
- this->add_extension(mach_mips4120, mach_mips4100);
- this->add_extension(mach_mips4111, mach_mips4100);
- // MIPS III extensions.
- this->add_extension(mach_mips_loongson_2e, mach_mips4000);
- this->add_extension(mach_mips_loongson_2f, mach_mips4000);
- this->add_extension(mach_mips8000, mach_mips4000);
- this->add_extension(mach_mips4650, mach_mips4000);
- this->add_extension(mach_mips4600, mach_mips4000);
- this->add_extension(mach_mips4400, mach_mips4000);
- this->add_extension(mach_mips4300, mach_mips4000);
- this->add_extension(mach_mips4100, mach_mips4000);
- this->add_extension(mach_mips4010, mach_mips4000);
- this->add_extension(mach_mips5900, mach_mips4000);
- // MIPS32 extensions.
- this->add_extension(mach_mipsisa32r2, mach_mipsisa32);
- // MIPS II extensions.
- this->add_extension(mach_mips4000, mach_mips6000);
- this->add_extension(mach_mipsisa32, mach_mips6000);
- // MIPS I extensions.
- this->add_extension(mach_mips6000, mach_mips3000);
- this->add_extension(mach_mips3900, mach_mips3000);
- }
- // Add value to MIPS extenstions.
- void
- add_extension(unsigned int base, unsigned int extension)
- {
- std::pair<unsigned int, unsigned int> ext(base, extension);
- this->mips_mach_extensions_.push_back(ext);
- }
- // Return the number of entries in the .dynsym section.
- unsigned int get_dt_mips_symtabno() const
- {
- return ((unsigned int)(this->layout_->dynsym_section()->data_size()
- / elfcpp::Elf_sizes<size>::sym_size));
- // TODO(sasa): Entry size is MIPS_ELF_SYM_SIZE.
- }
- // Information about this specific target which we pass to the
- // general Target structure.
- static const Target::Target_info mips_info;
- // The GOT section.
- Mips_output_data_got<size, big_endian>* got_;
- // gp symbol. It has the value of .got + 0x7FF0.
- Sized_symbol<size>* gp_;
- // The PLT section.
- Mips_output_data_plt<size, big_endian>* plt_;
- // The GOT PLT section.
- Output_data_space* got_plt_;
- // The dynamic reloc section.
- Reloc_section* rel_dyn_;
- // The .rld_map section.
- Output_data_zero_fill* rld_map_;
- // Relocs saved to avoid a COPY reloc.
- Mips_copy_relocs<elfcpp::SHT_REL, size, big_endian> copy_relocs_;
- // A list of dyn relocs to be saved.
- std::vector<Dyn_reloc> dyn_relocs_;
- // The LA25 stub section.
- Mips_output_data_la25_stub<size, big_endian>* la25_stub_;
- // Architecture extensions.
- std::vector<std::pair<unsigned int, unsigned int> > mips_mach_extensions_;
- // .MIPS.stubs
- Mips_output_data_mips_stubs<size, big_endian>* mips_stubs_;
- // Attributes section data in output.
- Attributes_section_data* attributes_section_data_;
- // .MIPS.abiflags section data in output.
- Mips_abiflags<big_endian>* abiflags_;
- unsigned int mach_;
- Layout* layout_;
- typename std::list<got16_addend<size, big_endian> > got16_addends_;
- // Whether there is an input .MIPS.abiflags section.
- bool has_abiflags_section_;
- // Whether the entry symbol is mips16 or micromips.
- bool entry_symbol_is_compressed_;
- // Whether we can use only 32-bit microMIPS instructions.
- // TODO(sasa): This should be a linker option.
- bool insn32_;
- };
- // Helper structure for R_MIPS*_HI16/LO16 and R_MIPS*_GOT16/LO16 relocations.
- // It records high part of the relocation pair.
- template<int size, bool big_endian>
- struct reloc_high
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- reloc_high(unsigned char* _view, const Mips_relobj<size, big_endian>* _object,
- const Symbol_value<size>* _psymval, Mips_address _addend,
- unsigned int _r_type, unsigned int _r_sym, bool _extract_addend,
- Mips_address _address = 0, bool _gp_disp = false)
- : view(_view), object(_object), psymval(_psymval), addend(_addend),
- r_type(_r_type), r_sym(_r_sym), extract_addend(_extract_addend),
- address(_address), gp_disp(_gp_disp)
- { }
- unsigned char* view;
- const Mips_relobj<size, big_endian>* object;
- const Symbol_value<size>* psymval;
- Mips_address addend;
- unsigned int r_type;
- unsigned int r_sym;
- bool extract_addend;
- Mips_address address;
- bool gp_disp;
- };
- template<int size, bool big_endian>
- class Mips_relocate_functions : public Relocate_functions<size, big_endian>
- {
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
- typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype;
- typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype16;
- typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32;
- typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype64;
- public:
- typedef enum
- {
- STATUS_OKAY, // No error during relocation.
- STATUS_OVERFLOW, // Relocation overflow.
- STATUS_BAD_RELOC, // Relocation cannot be applied.
- STATUS_PCREL_UNALIGNED // Unaligned PC-relative relocation.
- } Status;
- private:
- typedef Relocate_functions<size, big_endian> Base;
- typedef Mips_relocate_functions<size, big_endian> This;
- static typename std::list<reloc_high<size, big_endian> > hi16_relocs;
- static typename std::list<reloc_high<size, big_endian> > got16_relocs;
- static typename std::list<reloc_high<size, big_endian> > pchi16_relocs;
- template<int valsize>
- static inline typename This::Status
- check_overflow(Valtype value)
- {
- if (size == 32)
- return (Bits<valsize>::has_overflow32(value)
- ? This::STATUS_OVERFLOW
- : This::STATUS_OKAY);
- return (Bits<valsize>::has_overflow(value)
- ? This::STATUS_OVERFLOW
- : This::STATUS_OKAY);
- }
- static inline bool
- should_shuffle_micromips_reloc(unsigned int r_type)
- {
- return (micromips_reloc(r_type)
- && r_type != elfcpp::R_MICROMIPS_PC7_S1
- && r_type != elfcpp::R_MICROMIPS_PC10_S1);
- }
- public:
- // R_MIPS16_26 is used for the mips16 jal and jalx instructions.
- // Most mips16 instructions are 16 bits, but these instructions
- // are 32 bits.
- //
- // The format of these instructions is:
- //
- // +--------------+--------------------------------+
- // | JALX | X| Imm 20:16 | Imm 25:21 |
- // +--------------+--------------------------------+
- // | Immediate 15:0 |
- // +-----------------------------------------------+
- //
- // JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx.
- // Note that the immediate value in the first word is swapped.
- //
- // When producing a relocatable object file, R_MIPS16_26 is
- // handled mostly like R_MIPS_26. In particular, the addend is
- // stored as a straight 26-bit value in a 32-bit instruction.
- // (gas makes life simpler for itself by never adjusting a
- // R_MIPS16_26 reloc to be against a section, so the addend is
- // always zero). However, the 32 bit instruction is stored as 2
- // 16-bit values, rather than a single 32-bit value. In a
- // big-endian file, the result is the same; in a little-endian
- // file, the two 16-bit halves of the 32 bit value are swapped.
- // This is so that a disassembler can recognize the jal
- // instruction.
- //
- // When doing a final link, R_MIPS16_26 is treated as a 32 bit
- // instruction stored as two 16-bit values. The addend A is the
- // contents of the targ26 field. The calculation is the same as
- // R_MIPS_26. When storing the calculated value, reorder the
- // immediate value as shown above, and don't forget to store the
- // value as two 16-bit values.
- //
- // To put it in MIPS ABI terms, the relocation field is T-targ26-16,
- // defined as
- //
- // big-endian:
- // +--------+----------------------+
- // | | |
- // | | targ26-16 |
- // |31 26|25 0|
- // +--------+----------------------+
- //
- // little-endian:
- // +----------+------+-------------+
- // | | | |
- // | sub1 | | sub2 |
- // |0 9|10 15|16 31|
- // +----------+--------------------+
- // where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is
- // ((sub1 << 16) | sub2)).
- //
- // When producing a relocatable object file, the calculation is
- // (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
- // When producing a fully linked file, the calculation is
- // let R = (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
- // ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff)
- //
- // The table below lists the other MIPS16 instruction relocations.
- // Each one is calculated in the same way as the non-MIPS16 relocation
- // given on the right, but using the extended MIPS16 layout of 16-bit
- // immediate fields:
- //
- // R_MIPS16_GPREL R_MIPS_GPREL16
- // R_MIPS16_GOT16 R_MIPS_GOT16
- // R_MIPS16_CALL16 R_MIPS_CALL16
- // R_MIPS16_HI16 R_MIPS_HI16
- // R_MIPS16_LO16 R_MIPS_LO16
- //
- // A typical instruction will have a format like this:
- //
- // +--------------+--------------------------------+
- // | EXTEND | Imm 10:5 | Imm 15:11 |
- // +--------------+--------------------------------+
- // | Major | rx | ry | Imm 4:0 |
- // +--------------+--------------------------------+
- //
- // EXTEND is the five bit value 11110. Major is the instruction
- // opcode.
- //
- // All we need to do here is shuffle the bits appropriately.
- // As above, the two 16-bit halves must be swapped on a
- // little-endian system.
- // Similar to MIPS16, the two 16-bit halves in microMIPS must be swapped
- // on a little-endian system. This does not apply to R_MICROMIPS_PC7_S1
- // and R_MICROMIPS_PC10_S1 relocs that apply to 16-bit instructions.
- static void
- mips_reloc_unshuffle(unsigned char* view, unsigned int r_type,
- bool jal_shuffle)
- {
- if (!mips16_reloc(r_type)
- && !should_shuffle_micromips_reloc(r_type))
- return;
- // Pick up the first and second halfwords of the instruction.
- Valtype16 first = elfcpp::Swap<16, big_endian>::readval(view);
- Valtype16 second = elfcpp::Swap<16, big_endian>::readval(view + 2);
- Valtype32 val;
- if (micromips_reloc(r_type)
- || (r_type == elfcpp::R_MIPS16_26 && !jal_shuffle))
- val = first << 16 | second;
- else if (r_type != elfcpp::R_MIPS16_26)
- val = (((first & 0xf800) << 16) | ((second & 0xffe0) << 11)
- | ((first & 0x1f) << 11) | (first & 0x7e0) | (second & 0x1f));
- else
- val = (((first & 0xfc00) << 16) | ((first & 0x3e0) << 11)
- | ((first & 0x1f) << 21) | second);
- elfcpp::Swap<32, big_endian>::writeval(view, val);
- }
- static void
- mips_reloc_shuffle(unsigned char* view, unsigned int r_type, bool jal_shuffle)
- {
- if (!mips16_reloc(r_type)
- && !should_shuffle_micromips_reloc(r_type))
- return;
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
- Valtype16 first, second;
- if (micromips_reloc(r_type)
- || (r_type == elfcpp::R_MIPS16_26 && !jal_shuffle))
- {
- second = val & 0xffff;
- first = val >> 16;
- }
- else if (r_type != elfcpp::R_MIPS16_26)
- {
- second = ((val >> 11) & 0xffe0) | (val & 0x1f);
- first = ((val >> 16) & 0xf800) | ((val >> 11) & 0x1f) | (val & 0x7e0);
- }
- else
- {
- second = val & 0xffff;
- first = ((val >> 16) & 0xfc00) | ((val >> 11) & 0x3e0)
- | ((val >> 21) & 0x1f);
- }
- elfcpp::Swap<16, big_endian>::writeval(view + 2, second);
- elfcpp::Swap<16, big_endian>::writeval(view, first);
- }
- // R_MIPS_16: S + sign-extend(A)
- static inline typename This::Status
- rel16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, bool calculate_only, Valtype* calculated_value)
- {
- Valtype16* wv = reinterpret_cast<Valtype16*>(view);
- Valtype16 val = elfcpp::Swap<16, big_endian>::readval(wv);
- Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val)
- : addend_a);
- Valtype x = psymval->value(object, addend);
- val = Bits<16>::bit_select32(val, x, 0xffffU);
- if (calculate_only)
- {
- *calculated_value = x;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<16, big_endian>::writeval(wv, val);
- return check_overflow<16>(x);
- }
- // R_MIPS_32: S + A
- static inline typename This::Status
- rel32(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, bool calculate_only, Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype addend = (extract_addend
- ? elfcpp::Swap<32, big_endian>::readval(wv)
- : addend_a);
- Valtype x = psymval->value(object, addend);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, x);
- return This::STATUS_OKAY;
- }
- // R_MIPS_JALR, R_MICROMIPS_JALR
- static inline typename This::Status
- reljalr(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend, bool cross_mode_jump,
- unsigned int r_type, bool jalr_to_bal, bool jr_to_b,
- bool calculate_only, Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype addend = extract_addend ? 0 : addend_a;
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- // Try converting J(AL)R to B(AL), if the target is in range.
- if (r_type == elfcpp::R_MIPS_JALR
- && !cross_mode_jump
- && ((jalr_to_bal && val == 0x0320f809) // jalr t9
- || (jr_to_b && val == 0x03200008))) // jr t9
- {
- int offset = psymval->value(object, addend) - (address + 4);
- if (!Bits<18>::has_overflow32(offset))
- {
- if (val == 0x03200008) // jr t9
- val = 0x10000000 | (((Valtype32)offset >> 2) & 0xffff); // b addr
- else
- val = 0x04110000 | (((Valtype32)offset >> 2) & 0xffff); //bal addr
- }
- }
- if (calculate_only)
- *calculated_value = val;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MIPS_PC32: S + A - P
- static inline typename This::Status
- relpc32(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype addend = (extract_addend
- ? elfcpp::Swap<32, big_endian>::readval(wv)
- : addend_a);
- Valtype x = psymval->value(object, addend) - address;
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, x);
- return This::STATUS_OKAY;
- }
- // R_MIPS_26, R_MIPS16_26, R_MICROMIPS_26_S1
- static inline typename This::Status
- rel26(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- bool local, Mips_address addend_a, bool extract_addend,
- const Symbol* gsym, bool cross_mode_jump, unsigned int r_type,
- bool jal_to_bal, bool calculate_only, Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend;
- if (extract_addend)
- {
- if (r_type == elfcpp::R_MICROMIPS_26_S1)
- addend = (val & 0x03ffffff) << 1;
- else
- addend = (val & 0x03ffffff) << 2;
- }
- else
- addend = addend_a;
- // Make sure the target of JALX is word-aligned. Bit 0 must be
- // the correct ISA mode selector and bit 1 must be 0.
- if (!calculate_only && cross_mode_jump
- && (psymval->value(object, 0) & 3) != (r_type == elfcpp::R_MIPS_26))
- {
- gold_warning(_("JALX to a non-word-aligned address"));
- return This::STATUS_BAD_RELOC;
- }
- // Shift is 2, unusually, for microMIPS JALX.
- unsigned int shift =
- (!cross_mode_jump && r_type == elfcpp::R_MICROMIPS_26_S1) ? 1 : 2;
- Valtype x;
- if (local)
- x = addend | ((address + 4) & (0xfc000000 << shift));
- else
- {
- if (shift == 1)
- x = Bits<27>::sign_extend32(addend);
- else
- x = Bits<28>::sign_extend32(addend);
- }
- x = psymval->value(object, x) >> shift;
- if (!calculate_only && !local && !gsym->is_weak_undefined()
- && ((x >> 26) != ((address + 4) >> (26 + shift))))
- return This::STATUS_OVERFLOW;
- val = Bits<32>::bit_select32(val, x, 0x03ffffff);
- // If required, turn JAL into JALX.
- if (cross_mode_jump)
- {
- bool ok;
- Valtype32 opcode = val >> 26;
- Valtype32 jalx_opcode;
- // Check to see if the opcode is already JAL or JALX.
- if (r_type == elfcpp::R_MIPS16_26)
- {
- ok = (opcode == 0x6) || (opcode == 0x7);
- jalx_opcode = 0x7;
- }
- else if (r_type == elfcpp::R_MICROMIPS_26_S1)
- {
- ok = (opcode == 0x3d) || (opcode == 0x3c);
- jalx_opcode = 0x3c;
- }
- else
- {
- ok = (opcode == 0x3) || (opcode == 0x1d);
- jalx_opcode = 0x1d;
- }
- // If the opcode is not JAL or JALX, there's a problem. We cannot
- // convert J or JALS to JALX.
- if (!calculate_only && !ok)
- {
- gold_error(_("Unsupported jump between ISA modes; consider "
- "recompiling with interlinking enabled."));
- return This::STATUS_BAD_RELOC;
- }
- // Make this the JALX opcode.
- val = (val & ~(0x3f << 26)) | (jalx_opcode << 26);
- }
- // Try converting JAL to BAL, if the target is in range.
- if (!parameters->options().relocatable()
- && !cross_mode_jump
- && ((jal_to_bal
- && r_type == elfcpp::R_MIPS_26
- && (val >> 26) == 0x3))) // jal addr
- {
- Valtype32 dest = (x << 2) | (((address + 4) >> 28) << 28);
- int offset = dest - (address + 4);
- if (!Bits<18>::has_overflow32(offset))
- {
- if (val == 0x03200008) // jr t9
- val = 0x10000000 | (((Valtype32)offset >> 2) & 0xffff); // b addr
- else
- val = 0x04110000 | (((Valtype32)offset >> 2) & 0xffff); //bal addr
- }
- }
- if (calculate_only)
- *calculated_value = val;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MIPS_PC16
- static inline typename This::Status
- relpc16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend
- ? Bits<18>::sign_extend32((val & 0xffff) << 2)
- : addend_a);
- Valtype x = psymval->value(object, addend) - address;
- val = Bits<16>::bit_select32(val, x >> 2, 0xffff);
- if (calculate_only)
- {
- *calculated_value = x >> 2;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- if (psymval->value(object, addend) & 3)
- return This::STATUS_PCREL_UNALIGNED;
- return check_overflow<18>(x);
- }
- // R_MIPS_PC21_S2
- static inline typename This::Status
- relpc21(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend
- ? Bits<23>::sign_extend32((val & 0x1fffff) << 2)
- : addend_a);
- Valtype x = psymval->value(object, addend) - address;
- val = Bits<21>::bit_select32(val, x >> 2, 0x1fffff);
- if (calculate_only)
- {
- *calculated_value = x >> 2;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- if (psymval->value(object, addend) & 3)
- return This::STATUS_PCREL_UNALIGNED;
- return check_overflow<23>(x);
- }
- // R_MIPS_PC26_S2
- static inline typename This::Status
- relpc26(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend
- ? Bits<28>::sign_extend32((val & 0x3ffffff) << 2)
- : addend_a);
- Valtype x = psymval->value(object, addend) - address;
- val = Bits<26>::bit_select32(val, x >> 2, 0x3ffffff);
- if (calculate_only)
- {
- *calculated_value = x >> 2;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- if (psymval->value(object, addend) & 3)
- return This::STATUS_PCREL_UNALIGNED;
- return check_overflow<28>(x);
- }
- // R_MIPS_PC18_S3
- static inline typename This::Status
- relpc18(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend
- ? Bits<21>::sign_extend32((val & 0x3ffff) << 3)
- : addend_a);
- Valtype x = psymval->value(object, addend) - ((address | 7) ^ 7);
- val = Bits<18>::bit_select32(val, x >> 3, 0x3ffff);
- if (calculate_only)
- {
- *calculated_value = x >> 3;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- if (psymval->value(object, addend) & 7)
- return This::STATUS_PCREL_UNALIGNED;
- return check_overflow<21>(x);
- }
- // R_MIPS_PC19_S2
- static inline typename This::Status
- relpc19(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend
- ? Bits<21>::sign_extend32((val & 0x7ffff) << 2)
- : addend_a);
- Valtype x = psymval->value(object, addend) - address;
- val = Bits<19>::bit_select32(val, x >> 2, 0x7ffff);
- if (calculate_only)
- {
- *calculated_value = x >> 2;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- if (psymval->value(object, addend) & 3)
- return This::STATUS_PCREL_UNALIGNED;
- return check_overflow<21>(x);
- }
- // R_MIPS_PCHI16
- static inline typename This::Status
- relpchi16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend,
- Mips_address address, unsigned int r_sym, bool extract_addend)
- {
- // Record the relocation. It will be resolved when we find pclo16 part.
- pchi16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval,
- addend, 0, r_sym, extract_addend, address));
- return This::STATUS_OKAY;
- }
- // R_MIPS_PCHI16
- static inline typename This::Status
- do_relpchi16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_hi,
- Mips_address address, bool extract_addend, Valtype32 addend_lo,
- bool calculate_only, Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo
- : addend_hi);
- Valtype value = psymval->value(object, addend) - address;
- Valtype x = ((value + 0x8000) >> 16) & 0xffff;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MIPS_PCLO16
- static inline typename This::Status
- relpclo16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, Mips_address address, unsigned int r_sym,
- unsigned int rel_type, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff)
- : addend_a);
- if (rel_type == elfcpp::SHT_REL)
- {
- // Resolve pending R_MIPS_PCHI16 relocations.
- typename std::list<reloc_high<size, big_endian> >::iterator it =
- pchi16_relocs.begin();
- while (it != pchi16_relocs.end())
- {
- reloc_high<size, big_endian> pchi16 = *it;
- if (pchi16.r_sym == r_sym)
- {
- do_relpchi16(pchi16.view, pchi16.object, pchi16.psymval,
- pchi16.addend, pchi16.address,
- pchi16.extract_addend, addend, calculate_only,
- calculated_value);
- it = pchi16_relocs.erase(it);
- }
- else
- ++it;
- }
- }
- // Resolve R_MIPS_PCLO16 relocation.
- Valtype x = psymval->value(object, addend) - address;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MICROMIPS_PC7_S1
- static inline typename This::Status
- relmicromips_pc7_s1(unsigned char* view,
- const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend,
- bool calculate_only, Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = extract_addend ? Bits<8>::sign_extend32((val & 0x7f) << 1)
- : addend_a;
- Valtype x = psymval->value(object, addend) - address;
- val = Bits<16>::bit_select32(val, x >> 1, 0x7f);
- if (calculate_only)
- {
- *calculated_value = x >> 1;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return check_overflow<8>(x);
- }
- // R_MICROMIPS_PC10_S1
- static inline typename This::Status
- relmicromips_pc10_s1(unsigned char* view,
- const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend,
- bool calculate_only, Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend
- ? Bits<11>::sign_extend32((val & 0x3ff) << 1)
- : addend_a);
- Valtype x = psymval->value(object, addend) - address;
- val = Bits<16>::bit_select32(val, x >> 1, 0x3ff);
- if (calculate_only)
- {
- *calculated_value = x >> 1;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return check_overflow<11>(x);
- }
- // R_MICROMIPS_PC16_S1
- static inline typename This::Status
- relmicromips_pc16_s1(unsigned char* view,
- const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address address,
- Mips_address addend_a, bool extract_addend,
- bool calculate_only, Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend
- ? Bits<17>::sign_extend32((val & 0xffff) << 1)
- : addend_a);
- Valtype x = psymval->value(object, addend) - address;
- val = Bits<16>::bit_select32(val, x >> 1, 0xffff);
- if (calculate_only)
- {
- *calculated_value = x >> 1;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return check_overflow<17>(x);
- }
- // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
- static inline typename This::Status
- relhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend,
- Mips_address address, bool gp_disp, unsigned int r_type,
- unsigned int r_sym, bool extract_addend)
- {
- // Record the relocation. It will be resolved when we find lo16 part.
- hi16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval,
- addend, r_type, r_sym, extract_addend, address,
- gp_disp));
- return This::STATUS_OKAY;
- }
- // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
- static inline typename This::Status
- do_relhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_hi,
- Mips_address address, bool is_gp_disp, unsigned int r_type,
- bool extract_addend, Valtype32 addend_lo,
- Target_mips<size, big_endian>* target, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo
- : addend_hi);
- Valtype32 value;
- if (!is_gp_disp)
- value = psymval->value(object, addend);
- else
- {
- // For MIPS16 ABI code we generate this sequence
- // 0: li $v0,%hi(_gp_disp)
- // 4: addiupc $v1,%lo(_gp_disp)
- // 8: sll $v0,16
- // 12: addu $v0,$v1
- // 14: move $gp,$v0
- // So the offsets of hi and lo relocs are the same, but the
- // base $pc is that used by the ADDIUPC instruction at $t9 + 4.
- // ADDIUPC clears the low two bits of the instruction address,
- // so the base is ($t9 + 4) & ~3.
- Valtype32 gp_disp;
- if (r_type == elfcpp::R_MIPS16_HI16)
- gp_disp = (target->adjusted_gp_value(object)
- - ((address + 4) & ~0x3));
- // The microMIPS .cpload sequence uses the same assembly
- // instructions as the traditional psABI version, but the
- // incoming $t9 has the low bit set.
- else if (r_type == elfcpp::R_MICROMIPS_HI16)
- gp_disp = target->adjusted_gp_value(object) - address - 1;
- else
- gp_disp = target->adjusted_gp_value(object) - address;
- value = gp_disp + addend;
- }
- Valtype x = ((value + 0x8000) >> 16) & 0xffff;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- {
- *calculated_value = x;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return (is_gp_disp ? check_overflow<16>(x)
- : This::STATUS_OKAY);
- }
- // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
- static inline typename This::Status
- relgot16_local(unsigned char* view,
- const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, unsigned int r_type, unsigned int r_sym)
- {
- // Record the relocation. It will be resolved when we find lo16 part.
- got16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval,
- addend_a, r_type, r_sym, extract_addend));
- return This::STATUS_OKAY;
- }
- // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
- static inline typename This::Status
- do_relgot16_local(unsigned char* view,
- const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_hi,
- bool extract_addend, Valtype32 addend_lo,
- Target_mips<size, big_endian>* target, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo
- : addend_hi);
- // Find GOT page entry.
- Mips_address value = ((psymval->value(object, addend) + 0x8000) >> 16)
- & 0xffff;
- value <<= 16;
- unsigned int got_offset =
- target->got_section()->get_got_page_offset(value, object);
- // Resolve the relocation.
- Valtype x = target->got_section()->gp_offset(got_offset, object);
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- {
- *calculated_value = x;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return check_overflow<16>(x);
- }
- // R_MIPS_LO16, R_MIPS16_LO16, R_MICROMIPS_LO16, R_MICROMIPS_HI0_LO16
- static inline typename This::Status
- rello16(Target_mips<size, big_endian>* target, unsigned char* view,
- const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, Mips_address address, bool is_gp_disp,
- unsigned int r_type, unsigned int r_sym, unsigned int rel_type,
- bool calculate_only, Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff)
- : addend_a);
- if (rel_type == elfcpp::SHT_REL)
- {
- typename This::Status reloc_status = This::STATUS_OKAY;
- // Resolve pending R_MIPS_HI16 relocations.
- typename std::list<reloc_high<size, big_endian> >::iterator it =
- hi16_relocs.begin();
- while (it != hi16_relocs.end())
- {
- reloc_high<size, big_endian> hi16 = *it;
- if (hi16.r_sym == r_sym
- && is_matching_lo16_reloc(hi16.r_type, r_type))
- {
- mips_reloc_unshuffle(hi16.view, hi16.r_type, false);
- reloc_status = do_relhi16(hi16.view, hi16.object, hi16.psymval,
- hi16.addend, hi16.address, hi16.gp_disp,
- hi16.r_type, hi16.extract_addend, addend,
- target, calculate_only, calculated_value);
- mips_reloc_shuffle(hi16.view, hi16.r_type, false);
- if (reloc_status == This::STATUS_OVERFLOW)
- return This::STATUS_OVERFLOW;
- it = hi16_relocs.erase(it);
- }
- else
- ++it;
- }
- // Resolve pending local R_MIPS_GOT16 relocations.
- typename std::list<reloc_high<size, big_endian> >::iterator it2 =
- got16_relocs.begin();
- while (it2 != got16_relocs.end())
- {
- reloc_high<size, big_endian> got16 = *it2;
- if (got16.r_sym == r_sym
- && is_matching_lo16_reloc(got16.r_type, r_type))
- {
- mips_reloc_unshuffle(got16.view, got16.r_type, false);
- reloc_status = do_relgot16_local(got16.view, got16.object,
- got16.psymval, got16.addend,
- got16.extract_addend, addend, target,
- calculate_only, calculated_value);
- mips_reloc_shuffle(got16.view, got16.r_type, false);
- if (reloc_status == This::STATUS_OVERFLOW)
- return This::STATUS_OVERFLOW;
- it2 = got16_relocs.erase(it2);
- }
- else
- ++it2;
- }
- }
- // Resolve R_MIPS_LO16 relocation.
- Valtype x;
- if (!is_gp_disp)
- x = psymval->value(object, addend);
- else
- {
- // See the comment for R_MIPS16_HI16 above for the reason
- // for this conditional.
- Valtype32 gp_disp;
- if (r_type == elfcpp::R_MIPS16_LO16)
- gp_disp = target->adjusted_gp_value(object) - (address & ~0x3);
- else if (r_type == elfcpp::R_MICROMIPS_LO16
- || r_type == elfcpp::R_MICROMIPS_HI0_LO16)
- gp_disp = target->adjusted_gp_value(object) - address + 3;
- else
- gp_disp = target->adjusted_gp_value(object) - address + 4;
- // The MIPS ABI requires checking the R_MIPS_LO16 relocation
- // for overflow. Relocations against _gp_disp are normally
- // generated from the .cpload pseudo-op. It generates code
- // that normally looks like this:
- // lui $gp,%hi(_gp_disp)
- // addiu $gp,$gp,%lo(_gp_disp)
- // addu $gp,$gp,$t9
- // Here $t9 holds the address of the function being called,
- // as required by the MIPS ELF ABI. The R_MIPS_LO16
- // relocation can easily overflow in this situation, but the
- // R_MIPS_HI16 relocation will handle the overflow.
- // Therefore, we consider this a bug in the MIPS ABI, and do
- // not check for overflow here.
- x = gp_disp + addend;
- }
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MIPS_CALL16, R_MIPS16_CALL16, R_MICROMIPS_CALL16
- // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
- // R_MIPS_TLS_GD, R_MIPS16_TLS_GD, R_MICROMIPS_TLS_GD
- // R_MIPS_TLS_GOTTPREL, R_MIPS16_TLS_GOTTPREL, R_MICROMIPS_TLS_GOTTPREL
- // R_MIPS_TLS_LDM, R_MIPS16_TLS_LDM, R_MICROMIPS_TLS_LDM
- // R_MIPS_GOT_DISP, R_MICROMIPS_GOT_DISP
- static inline typename This::Status
- relgot(unsigned char* view, int gp_offset, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype x = gp_offset;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- {
- *calculated_value = x;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return check_overflow<16>(x);
- }
- // R_MIPS_EH
- static inline typename This::Status
- releh(unsigned char* view, int gp_offset, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype x = gp_offset;
- if (calculate_only)
- {
- *calculated_value = x;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, x);
- return check_overflow<32>(x);
- }
- // R_MIPS_GOT_PAGE, R_MICROMIPS_GOT_PAGE
- static inline typename This::Status
- relgotpage(Target_mips<size, big_endian>* target, unsigned char* view,
- const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
- Valtype addend = extract_addend ? val & 0xffff : addend_a;
- // Find a GOT page entry that points to within 32KB of symbol + addend.
- Mips_address value = (psymval->value(object, addend) + 0x8000) & ~0xffff;
- unsigned int got_offset =
- target->got_section()->get_got_page_offset(value, object);
- Valtype x = target->got_section()->gp_offset(got_offset, object);
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- {
- *calculated_value = x;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return check_overflow<16>(x);
- }
- // R_MIPS_GOT_OFST, R_MICROMIPS_GOT_OFST
- static inline typename This::Status
- relgotofst(Target_mips<size, big_endian>* target, unsigned char* view,
- const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, bool local, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
- Valtype addend = extract_addend ? val & 0xffff : addend_a;
- // For a local symbol, find a GOT page entry that points to within 32KB of
- // symbol + addend. Relocation value is the offset of the GOT page entry's
- // value from symbol + addend.
- // For a global symbol, relocation value is addend.
- Valtype x;
- if (local)
- {
- // Find GOT page entry.
- Mips_address value = ((psymval->value(object, addend) + 0x8000)
- & ~0xffff);
- target->got_section()->get_got_page_offset(value, object);
- x = psymval->value(object, addend) - value;
- }
- else
- x = addend;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- {
- *calculated_value = x;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return check_overflow<16>(x);
- }
- // R_MIPS_GOT_HI16, R_MIPS_CALL_HI16,
- // R_MICROMIPS_GOT_HI16, R_MICROMIPS_CALL_HI16
- static inline typename This::Status
- relgot_hi16(unsigned char* view, int gp_offset, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype x = gp_offset;
- x = ((x + 0x8000) >> 16) & 0xffff;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MIPS_GOT_LO16, R_MIPS_CALL_LO16,
- // R_MICROMIPS_GOT_LO16, R_MICROMIPS_CALL_LO16
- static inline typename This::Status
- relgot_lo16(unsigned char* view, int gp_offset, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype x = gp_offset;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MIPS_GPREL16, R_MIPS16_GPREL, R_MIPS_LITERAL, R_MICROMIPS_LITERAL
- // R_MICROMIPS_GPREL7_S2, R_MICROMIPS_GPREL16
- static inline typename This::Status
- relgprel(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address gp,
- Mips_address addend_a, bool extract_addend, bool local,
- unsigned int r_type, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend;
- if (extract_addend)
- {
- if (r_type == elfcpp::R_MICROMIPS_GPREL7_S2)
- addend = (val & 0x7f) << 2;
- else
- addend = val & 0xffff;
- // Only sign-extend the addend if it was extracted from the
- // instruction. If the addend was separate, leave it alone,
- // otherwise we may lose significant bits.
- addend = Bits<16>::sign_extend32(addend);
- }
- else
- addend = addend_a;
- Valtype x = psymval->value(object, addend) - gp;
- // If the symbol was local, any earlier relocatable links will
- // have adjusted its addend with the gp offset, so compensate
- // for that now. Don't do it for symbols forced local in this
- // link, though, since they won't have had the gp offset applied
- // to them before.
- if (local)
- x += object->gp_value();
- if (r_type == elfcpp::R_MICROMIPS_GPREL7_S2)
- val = Bits<32>::bit_select32(val, x, 0x7f);
- else
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- {
- *calculated_value = x;
- return This::STATUS_OKAY;
- }
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- if (check_overflow<16>(x) == This::STATUS_OVERFLOW)
- {
- gold_error(_("small-data section exceeds 64KB; lower small-data size "
- "limit (see option -G)"));
- return This::STATUS_OVERFLOW;
- }
- return This::STATUS_OKAY;
- }
- // R_MIPS_GPREL32
- static inline typename This::Status
- relgprel32(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address gp,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = extract_addend ? val : addend_a;
- // R_MIPS_GPREL32 relocations are defined for local symbols only.
- Valtype x = psymval->value(object, addend) + object->gp_value() - gp;
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, x);
- return This::STATUS_OKAY;
- }
- // R_MIPS_TLS_TPREL_HI16, R_MIPS16_TLS_TPREL_HI16, R_MICROMIPS_TLS_TPREL_HI16
- // R_MIPS_TLS_DTPREL_HI16, R_MIPS16_TLS_DTPREL_HI16,
- // R_MICROMIPS_TLS_DTPREL_HI16
- static inline typename This::Status
- tlsrelhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Valtype32 tp_offset,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = extract_addend ? val & 0xffff : addend_a;
- // tls symbol values are relative to tls_segment()->vaddr()
- Valtype x = ((psymval->value(object, addend) - tp_offset) + 0x8000) >> 16;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MIPS_TLS_TPREL_LO16, R_MIPS16_TLS_TPREL_LO16, R_MICROMIPS_TLS_TPREL_LO16,
- // R_MIPS_TLS_DTPREL_LO16, R_MIPS16_TLS_DTPREL_LO16,
- // R_MICROMIPS_TLS_DTPREL_LO16,
- static inline typename This::Status
- tlsrello16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Valtype32 tp_offset,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = extract_addend ? val & 0xffff : addend_a;
- // tls symbol values are relative to tls_segment()->vaddr()
- Valtype x = psymval->value(object, addend) - tp_offset;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL64,
- // R_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL64
- static inline typename This::Status
- tlsrel32(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Valtype32 tp_offset,
- Mips_address addend_a, bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = extract_addend ? val : addend_a;
- // tls symbol values are relative to tls_segment()->vaddr()
- Valtype x = psymval->value(object, addend) - tp_offset;
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, x);
- return This::STATUS_OKAY;
- }
- // R_MIPS_SUB, R_MICROMIPS_SUB
- static inline typename This::Status
- relsub(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, bool calculate_only, Valtype* calculated_value)
- {
- Valtype64* wv = reinterpret_cast<Valtype64*>(view);
- Valtype64 addend = (extract_addend
- ? elfcpp::Swap<64, big_endian>::readval(wv)
- : addend_a);
- Valtype64 x = psymval->value(object, -addend);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<64, big_endian>::writeval(wv, x);
- return This::STATUS_OKAY;
- }
- // R_MIPS_64: S + A
- static inline typename This::Status
- rel64(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, bool calculate_only, Valtype* calculated_value,
- bool apply_addend_only)
- {
- Valtype64* wv = reinterpret_cast<Valtype64*>(view);
- Valtype64 addend = (extract_addend
- ? elfcpp::Swap<64, big_endian>::readval(wv)
- : addend_a);
- Valtype64 x = psymval->value(object, addend);
- if (calculate_only)
- *calculated_value = x;
- else
- {
- if (apply_addend_only)
- x = addend;
- elfcpp::Swap<64, big_endian>::writeval(wv, x);
- }
- return This::STATUS_OKAY;
- }
- // R_MIPS_HIGHER, R_MICROMIPS_HIGHER
- static inline typename This::Status
- relhigher(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, bool calculate_only, Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff)
- : addend_a);
- Valtype x = psymval->value(object, addend);
- x = ((x + (uint64_t) 0x80008000) >> 32) & 0xffff;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- // R_MIPS_HIGHEST, R_MICROMIPS_HIGHEST
- static inline typename This::Status
- relhighest(unsigned char* view, const Mips_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval, Mips_address addend_a,
- bool extract_addend, bool calculate_only,
- Valtype* calculated_value)
- {
- Valtype32* wv = reinterpret_cast<Valtype32*>(view);
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff)
- : addend_a);
- Valtype x = psymval->value(object, addend);
- x = ((x + (uint64_t) 0x800080008000llu) >> 48) & 0xffff;
- val = Bits<32>::bit_select32(val, x, 0xffff);
- if (calculate_only)
- *calculated_value = x;
- else
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return This::STATUS_OKAY;
- }
- };
- template<int size, bool big_endian>
- typename std::list<reloc_high<size, big_endian> >
- Mips_relocate_functions<size, big_endian>::hi16_relocs;
- template<int size, bool big_endian>
- typename std::list<reloc_high<size, big_endian> >
- Mips_relocate_functions<size, big_endian>::got16_relocs;
- template<int size, bool big_endian>
- typename std::list<reloc_high<size, big_endian> >
- Mips_relocate_functions<size, big_endian>::pchi16_relocs;
- // Mips_got_info methods.
- // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
- // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::record_local_got_symbol(
- Mips_relobj<size, big_endian>* object, unsigned int symndx,
- Mips_address addend, unsigned int r_type, unsigned int shndx,
- bool is_section_symbol)
- {
- Mips_got_entry<size, big_endian>* entry =
- new Mips_got_entry<size, big_endian>(object, symndx, addend,
- mips_elf_reloc_tls_type(r_type),
- shndx, is_section_symbol);
- this->record_got_entry(entry, object);
- }
- // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
- // in OBJECT. FOR_CALL is true if the caller is only interested in
- // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
- // relocation.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::record_global_got_symbol(
- Mips_symbol<size>* mips_sym, Mips_relobj<size, big_endian>* object,
- unsigned int r_type, bool dyn_reloc, bool for_call)
- {
- if (!for_call)
- mips_sym->set_got_not_only_for_calls();
- // A global symbol in the GOT must also be in the dynamic symbol table.
- if (!mips_sym->needs_dynsym_entry() && !mips_sym->is_forced_local())
- {
- switch (mips_sym->visibility())
- {
- case elfcpp::STV_INTERNAL:
- case elfcpp::STV_HIDDEN:
- mips_sym->set_is_forced_local();
- break;
- default:
- mips_sym->set_needs_dynsym_entry();
- break;
- }
- }
- unsigned char tls_type = mips_elf_reloc_tls_type(r_type);
- if (tls_type == GOT_TLS_NONE)
- this->global_got_symbols_.insert(mips_sym);
- if (dyn_reloc)
- {
- if (mips_sym->global_got_area() == GGA_NONE)
- mips_sym->set_global_got_area(GGA_RELOC_ONLY);
- return;
- }
- Mips_got_entry<size, big_endian>* entry =
- new Mips_got_entry<size, big_endian>(mips_sym, tls_type);
- this->record_got_entry(entry, object);
- }
- // Add ENTRY to master GOT and to OBJECT's GOT.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::record_got_entry(
- Mips_got_entry<size, big_endian>* entry,
- Mips_relobj<size, big_endian>* object)
- {
- this->got_entries_.insert(entry);
- // Create the GOT entry for the OBJECT's GOT.
- Mips_got_info<size, big_endian>* g = object->get_or_create_got_info();
- Mips_got_entry<size, big_endian>* entry2 =
- new Mips_got_entry<size, big_endian>(*entry);
- g->got_entries_.insert(entry2);
- }
- // Record that OBJECT has a page relocation against symbol SYMNDX and
- // that ADDEND is the addend for that relocation.
- // This function creates an upper bound on the number of GOT slots
- // required; no attempt is made to combine references to non-overridable
- // global symbols across multiple input files.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::record_got_page_entry(
- Mips_relobj<size, big_endian>* object, unsigned int symndx, int addend)
- {
- struct Got_page_range **range_ptr, *range;
- int old_pages, new_pages;
- // Find the Got_page_entry for this symbol.
- Got_page_entry* entry = new Got_page_entry(object, symndx);
- typename Got_page_entry_set::iterator it =
- this->got_page_entries_.find(entry);
- if (it != this->got_page_entries_.end())
- entry = *it;
- else
- this->got_page_entries_.insert(entry);
- // Get the object's GOT, but we don't need to insert an entry here.
- Mips_got_info<size, big_endian>* g2 = object->get_or_create_got_info();
- // Skip over ranges whose maximum extent cannot share a page entry
- // with ADDEND.
- range_ptr = &entry->ranges;
- while (*range_ptr && addend > (*range_ptr)->max_addend + 0xffff)
- range_ptr = &(*range_ptr)->next;
- // If we scanned to the end of the list, or found a range whose
- // minimum extent cannot share a page entry with ADDEND, create
- // a new singleton range.
- range = *range_ptr;
- if (!range || addend < range->min_addend - 0xffff)
- {
- range = new Got_page_range();
- range->next = *range_ptr;
- range->min_addend = addend;
- range->max_addend = addend;
- *range_ptr = range;
- ++this->page_gotno_;
- ++g2->page_gotno_;
- return;
- }
- // Remember how many pages the old range contributed.
- old_pages = range->get_max_pages();
- // Update the ranges.
- if (addend < range->min_addend)
- range->min_addend = addend;
- else if (addend > range->max_addend)
- {
- if (range->next && addend >= range->next->min_addend - 0xffff)
- {
- old_pages += range->next->get_max_pages();
- range->max_addend = range->next->max_addend;
- range->next = range->next->next;
- }
- else
- range->max_addend = addend;
- }
- // Record any change in the total estimate.
- new_pages = range->get_max_pages();
- if (old_pages != new_pages)
- {
- this->page_gotno_ += new_pages - old_pages;
- g2->page_gotno_ += new_pages - old_pages;
- }
- }
- // Create all entries that should be in the local part of the GOT.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::add_local_entries(
- Target_mips<size, big_endian>* target, Layout* layout)
- {
- Mips_output_data_got<size, big_endian>* got = target->got_section();
- // First two GOT entries are reserved. The first entry will be filled at
- // runtime. The second entry will be used by some runtime loaders.
- got->add_constant(0);
- got->add_constant(target->mips_elf_gnu_got1_mask());
- for (typename Got_entry_set::iterator
- p = this->got_entries_.begin();
- p != this->got_entries_.end();
- ++p)
- {
- Mips_got_entry<size, big_endian>* entry = *p;
- if (entry->is_for_local_symbol() && !entry->is_tls_entry())
- {
- got->add_local(entry->object(), entry->symndx(),
- GOT_TYPE_STANDARD, entry->addend());
- unsigned int got_offset = entry->object()->local_got_offset(
- entry->symndx(), GOT_TYPE_STANDARD, entry->addend());
- if (got->multi_got() && this->index_ > 0
- && parameters->options().output_is_position_independent())
- {
- if (!entry->is_section_symbol())
- target->rel_dyn_section(layout)->add_local(entry->object(),
- entry->symndx(), elfcpp::R_MIPS_REL32, got, got_offset);
- else
- target->rel_dyn_section(layout)->add_symbolless_local_addend(
- entry->object(), entry->symndx(), elfcpp::R_MIPS_REL32,
- got, got_offset);
- }
- }
- }
- this->add_page_entries(target, layout);
- // Add global entries that should be in the local area.
- for (typename Got_entry_set::iterator
- p = this->got_entries_.begin();
- p != this->got_entries_.end();
- ++p)
- {
- Mips_got_entry<size, big_endian>* entry = *p;
- if (!entry->is_for_global_symbol())
- continue;
- Mips_symbol<size>* mips_sym = entry->sym();
- if (mips_sym->global_got_area() == GGA_NONE && !entry->is_tls_entry())
- {
- unsigned int got_type;
- if (!got->multi_got())
- got_type = GOT_TYPE_STANDARD;
- else
- got_type = GOT_TYPE_STANDARD_MULTIGOT + this->index_;
- if (got->add_global(mips_sym, got_type))
- {
- mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type));
- if (got->multi_got() && this->index_ > 0
- && parameters->options().output_is_position_independent())
- target->rel_dyn_section(layout)->add_symbolless_global_addend(
- mips_sym, elfcpp::R_MIPS_REL32, got,
- mips_sym->got_offset(got_type));
- }
- }
- }
- }
- // Create GOT page entries.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::add_page_entries(
- Target_mips<size, big_endian>* target, Layout* layout)
- {
- if (this->page_gotno_ == 0)
- return;
- Mips_output_data_got<size, big_endian>* got = target->got_section();
- this->got_page_offset_start_ = got->add_constant(0);
- if (got->multi_got() && this->index_ > 0
- && parameters->options().output_is_position_independent())
- target->rel_dyn_section(layout)->add_absolute(elfcpp::R_MIPS_REL32, got,
- this->got_page_offset_start_);
- int num_entries = this->page_gotno_;
- unsigned int prev_offset = this->got_page_offset_start_;
- while (--num_entries > 0)
- {
- unsigned int next_offset = got->add_constant(0);
- if (got->multi_got() && this->index_ > 0
- && parameters->options().output_is_position_independent())
- target->rel_dyn_section(layout)->add_absolute(elfcpp::R_MIPS_REL32, got,
- next_offset);
- gold_assert(next_offset == prev_offset + size/8);
- prev_offset = next_offset;
- }
- this->got_page_offset_next_ = this->got_page_offset_start_;
- }
- // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::add_global_entries(
- Target_mips<size, big_endian>* target, Layout* layout,
- unsigned int non_reloc_only_global_gotno)
- {
- Mips_output_data_got<size, big_endian>* got = target->got_section();
- // Add GGA_NORMAL entries.
- unsigned int count = 0;
- for (typename Got_entry_set::iterator
- p = this->got_entries_.begin();
- p != this->got_entries_.end();
- ++p)
- {
- Mips_got_entry<size, big_endian>* entry = *p;
- if (!entry->is_for_global_symbol())
- continue;
- Mips_symbol<size>* mips_sym = entry->sym();
- if (mips_sym->global_got_area() != GGA_NORMAL)
- continue;
- unsigned int got_type;
- if (!got->multi_got())
- got_type = GOT_TYPE_STANDARD;
- else
- // In multi-GOT links, global symbol can be in both primary and
- // secondary GOT(s). By creating custom GOT type
- // (GOT_TYPE_STANDARD_MULTIGOT + got_index) we ensure that symbol
- // is added to secondary GOT(s).
- got_type = GOT_TYPE_STANDARD_MULTIGOT + this->index_;
- if (!got->add_global(mips_sym, got_type))
- continue;
- mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type));
- if (got->multi_got() && this->index_ == 0)
- count++;
- if (got->multi_got() && this->index_ > 0)
- {
- if (parameters->options().output_is_position_independent()
- || (!parameters->doing_static_link()
- && mips_sym->is_from_dynobj() && !mips_sym->is_undefined()))
- {
- target->rel_dyn_section(layout)->add_global(
- mips_sym, elfcpp::R_MIPS_REL32, got,
- mips_sym->got_offset(got_type));
- got->add_secondary_got_reloc(mips_sym->got_offset(got_type),
- elfcpp::R_MIPS_REL32, mips_sym);
- }
- }
- }
- if (!got->multi_got() || this->index_ == 0)
- {
- if (got->multi_got())
- {
- // We need to allocate space in the primary GOT for GGA_NORMAL entries
- // of secondary GOTs, to ensure that GOT offsets of GGA_RELOC_ONLY
- // entries correspond to dynamic symbol indexes.
- while (count < non_reloc_only_global_gotno)
- {
- got->add_constant(0);
- ++count;
- }
- }
- // Add GGA_RELOC_ONLY entries.
- got->add_reloc_only_entries();
- }
- }
- // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::add_reloc_only_entries(
- Mips_output_data_got<size, big_endian>* got)
- {
- for (typename Global_got_entry_set::iterator
- p = this->global_got_symbols_.begin();
- p != this->global_got_symbols_.end();
- ++p)
- {
- Mips_symbol<size>* mips_sym = *p;
- if (mips_sym->global_got_area() == GGA_RELOC_ONLY)
- {
- unsigned int got_type;
- if (!got->multi_got())
- got_type = GOT_TYPE_STANDARD;
- else
- got_type = GOT_TYPE_STANDARD_MULTIGOT;
- if (got->add_global(mips_sym, got_type))
- mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type));
- }
- }
- }
- // Create TLS GOT entries.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::add_tls_entries(
- Target_mips<size, big_endian>* target, Layout* layout)
- {
- Mips_output_data_got<size, big_endian>* got = target->got_section();
- // Add local tls entries.
- for (typename Got_entry_set::iterator
- p = this->got_entries_.begin();
- p != this->got_entries_.end();
- ++p)
- {
- Mips_got_entry<size, big_endian>* entry = *p;
- if (!entry->is_tls_entry() || !entry->is_for_local_symbol())
- continue;
- if (entry->tls_type() == GOT_TLS_GD)
- {
- unsigned int got_type = GOT_TYPE_TLS_PAIR;
- unsigned int r_type1 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
- : elfcpp::R_MIPS_TLS_DTPMOD64);
- unsigned int r_type2 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32
- : elfcpp::R_MIPS_TLS_DTPREL64);
- if (!parameters->doing_static_link())
- {
- got->add_local_pair_with_rel(entry->object(), entry->symndx(),
- entry->shndx(), got_type,
- target->rel_dyn_section(layout),
- r_type1, entry->addend());
- unsigned int got_offset =
- entry->object()->local_got_offset(entry->symndx(), got_type,
- entry->addend());
- got->add_static_reloc(got_offset + size/8, r_type2,
- entry->object(), entry->symndx());
- }
- else
- {
- // We are doing a static link. Mark it as belong to module 1,
- // the executable.
- unsigned int got_offset = got->add_constant(1);
- entry->object()->set_local_got_offset(entry->symndx(), got_type,
- got_offset,
- entry->addend());
- got->add_constant(0);
- got->add_static_reloc(got_offset + size/8, r_type2,
- entry->object(), entry->symndx());
- }
- }
- else if (entry->tls_type() == GOT_TLS_IE)
- {
- unsigned int got_type = GOT_TYPE_TLS_OFFSET;
- unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_TPREL32
- : elfcpp::R_MIPS_TLS_TPREL64);
- if (!parameters->doing_static_link())
- got->add_local_with_rel(entry->object(), entry->symndx(), got_type,
- target->rel_dyn_section(layout), r_type,
- entry->addend());
- else
- {
- got->add_local(entry->object(), entry->symndx(), got_type,
- entry->addend());
- unsigned int got_offset =
- entry->object()->local_got_offset(entry->symndx(), got_type,
- entry->addend());
- got->add_static_reloc(got_offset, r_type, entry->object(),
- entry->symndx());
- }
- }
- else if (entry->tls_type() == GOT_TLS_LDM)
- {
- unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
- : elfcpp::R_MIPS_TLS_DTPMOD64);
- unsigned int got_offset;
- if (!parameters->doing_static_link())
- {
- got_offset = got->add_constant(0);
- target->rel_dyn_section(layout)->add_local(
- entry->object(), 0, r_type, got, got_offset);
- }
- else
- // We are doing a static link. Just mark it as belong to module 1,
- // the executable.
- got_offset = got->add_constant(1);
- got->add_constant(0);
- got->set_tls_ldm_offset(got_offset, entry->object());
- }
- else
- gold_unreachable();
- }
- // Add global tls entries.
- for (typename Got_entry_set::iterator
- p = this->got_entries_.begin();
- p != this->got_entries_.end();
- ++p)
- {
- Mips_got_entry<size, big_endian>* entry = *p;
- if (!entry->is_tls_entry() || !entry->is_for_global_symbol())
- continue;
- Mips_symbol<size>* mips_sym = entry->sym();
- if (entry->tls_type() == GOT_TLS_GD)
- {
- unsigned int got_type;
- if (!got->multi_got())
- got_type = GOT_TYPE_TLS_PAIR;
- else
- got_type = GOT_TYPE_TLS_PAIR_MULTIGOT + this->index_;
- unsigned int r_type1 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
- : elfcpp::R_MIPS_TLS_DTPMOD64);
- unsigned int r_type2 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32
- : elfcpp::R_MIPS_TLS_DTPREL64);
- if (!parameters->doing_static_link())
- got->add_global_pair_with_rel(mips_sym, got_type,
- target->rel_dyn_section(layout), r_type1, r_type2);
- else
- {
- // Add a GOT pair for for R_MIPS_TLS_GD. The creates a pair of
- // GOT entries. The first one is initialized to be 1, which is the
- // module index for the main executable and the second one 0. A
- // reloc of the type R_MIPS_TLS_DTPREL32/64 will be created for
- // the second GOT entry and will be applied by gold.
- unsigned int got_offset = got->add_constant(1);
- mips_sym->set_got_offset(got_type, got_offset);
- got->add_constant(0);
- got->add_static_reloc(got_offset + size/8, r_type2, mips_sym);
- }
- }
- else if (entry->tls_type() == GOT_TLS_IE)
- {
- unsigned int got_type;
- if (!got->multi_got())
- got_type = GOT_TYPE_TLS_OFFSET;
- else
- got_type = GOT_TYPE_TLS_OFFSET_MULTIGOT + this->index_;
- unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_TPREL32
- : elfcpp::R_MIPS_TLS_TPREL64);
- if (!parameters->doing_static_link())
- got->add_global_with_rel(mips_sym, got_type,
- target->rel_dyn_section(layout), r_type);
- else
- {
- got->add_global(mips_sym, got_type);
- unsigned int got_offset = mips_sym->got_offset(got_type);
- got->add_static_reloc(got_offset, r_type, mips_sym);
- }
- }
- else
- gold_unreachable();
- }
- }
- // Decide whether the symbol needs an entry in the global part of the primary
- // GOT, setting global_got_area accordingly. Count the number of global
- // symbols that are in the primary GOT only because they have dynamic
- // relocations R_MIPS_REL32 against them (reloc_only_gotno).
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::count_got_symbols(Symbol_table* symtab)
- {
- for (typename Global_got_entry_set::iterator
- p = this->global_got_symbols_.begin();
- p != this->global_got_symbols_.end();
- ++p)
- {
- Mips_symbol<size>* sym = *p;
- // Make a final decision about whether the symbol belongs in the
- // local or global GOT. Symbols that bind locally can (and in the
- // case of forced-local symbols, must) live in the local GOT.
- // Those that are aren't in the dynamic symbol table must also
- // live in the local GOT.
- if (!sym->should_add_dynsym_entry(symtab)
- || (sym->got_only_for_calls()
- ? symbol_calls_local(sym, sym->should_add_dynsym_entry(symtab))
- : symbol_references_local(sym,
- sym->should_add_dynsym_entry(symtab))))
- // The symbol belongs in the local GOT. We no longer need this
- // entry if it was only used for relocations; those relocations
- // will be against the null or section symbol instead.
- sym->set_global_got_area(GGA_NONE);
- else if (sym->global_got_area() == GGA_RELOC_ONLY)
- {
- ++this->reloc_only_gotno_;
- ++this->global_gotno_ ;
- }
- }
- }
- // Return the offset of GOT page entry for VALUE. Initialize the entry with
- // VALUE if it is not initialized.
- template<int size, bool big_endian>
- unsigned int
- Mips_got_info<size, big_endian>::get_got_page_offset(Mips_address value,
- Mips_output_data_got<size, big_endian>* got)
- {
- typename Got_page_offsets::iterator it = this->got_page_offsets_.find(value);
- if (it != this->got_page_offsets_.end())
- return it->second;
- gold_assert(this->got_page_offset_next_ < this->got_page_offset_start_
- + (size/8) * this->page_gotno_);
- unsigned int got_offset = this->got_page_offset_next_;
- this->got_page_offsets_[value] = got_offset;
- this->got_page_offset_next_ += size/8;
- got->update_got_entry(got_offset, value);
- return got_offset;
- }
- // Remove lazy-binding stubs for global symbols in this GOT.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::remove_lazy_stubs(
- Target_mips<size, big_endian>* target)
- {
- for (typename Got_entry_set::iterator
- p = this->got_entries_.begin();
- p != this->got_entries_.end();
- ++p)
- {
- Mips_got_entry<size, big_endian>* entry = *p;
- if (entry->is_for_global_symbol())
- target->remove_lazy_stub_entry(entry->sym());
- }
- }
- // Count the number of GOT entries required.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::count_got_entries()
- {
- for (typename Got_entry_set::iterator
- p = this->got_entries_.begin();
- p != this->got_entries_.end();
- ++p)
- {
- this->count_got_entry(*p);
- }
- }
- // Count the number of GOT entries required by ENTRY. Accumulate the result.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::count_got_entry(
- Mips_got_entry<size, big_endian>* entry)
- {
- if (entry->is_tls_entry())
- this->tls_gotno_ += mips_tls_got_entries(entry->tls_type());
- else if (entry->is_for_local_symbol()
- || entry->sym()->global_got_area() == GGA_NONE)
- ++this->local_gotno_;
- else
- ++this->global_gotno_;
- }
- // Add FROM's GOT entries.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::add_got_entries(
- Mips_got_info<size, big_endian>* from)
- {
- for (typename Got_entry_set::iterator
- p = from->got_entries_.begin();
- p != from->got_entries_.end();
- ++p)
- {
- Mips_got_entry<size, big_endian>* entry = *p;
- if (this->got_entries_.find(entry) == this->got_entries_.end())
- {
- Mips_got_entry<size, big_endian>* entry2 =
- new Mips_got_entry<size, big_endian>(*entry);
- this->got_entries_.insert(entry2);
- this->count_got_entry(entry);
- }
- }
- }
- // Add FROM's GOT page entries.
- template<int size, bool big_endian>
- void
- Mips_got_info<size, big_endian>::add_got_page_count(
- Mips_got_info<size, big_endian>* from)
- {
- this->page_gotno_ += from->page_gotno_;
- }
- // Mips_output_data_got methods.
- // Lay out the GOT. Add local, global and TLS entries. If GOT is
- // larger than 64K, create multi-GOT.
- template<int size, bool big_endian>
- void
- Mips_output_data_got<size, big_endian>::lay_out_got(Layout* layout,
- Symbol_table* symtab, const Input_objects* input_objects)
- {
- // Decide which symbols need to go in the global part of the GOT and
- // count the number of reloc-only GOT symbols.
- this->master_got_info_->count_got_symbols(symtab);
- // Count the number of GOT entries.
- this->master_got_info_->count_got_entries();
- unsigned int got_size = this->master_got_info_->got_size();
- if (got_size > Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE)
- this->lay_out_multi_got(layout, input_objects);
- else
- {
- // Record that all objects use single GOT.
- for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
- p != input_objects->relobj_end();
- ++p)
- {
- Mips_relobj<size, big_endian>* object =
- Mips_relobj<size, big_endian>::as_mips_relobj(*p);
- if (object->get_got_info() != NULL)
- object->set_got_info(this->master_got_info_);
- }
- this->master_got_info_->add_local_entries(this->target_, layout);
- this->master_got_info_->add_global_entries(this->target_, layout,
- /*not used*/-1U);
- this->master_got_info_->add_tls_entries(this->target_, layout);
- }
- }
- // Create multi-GOT. For every GOT, add local, global and TLS entries.
- template<int size, bool big_endian>
- void
- Mips_output_data_got<size, big_endian>::lay_out_multi_got(Layout* layout,
- const Input_objects* input_objects)
- {
- // Try to merge the GOTs of input objects together, as long as they
- // don't seem to exceed the maximum GOT size, choosing one of them
- // to be the primary GOT.
- this->merge_gots(input_objects);
- // Every symbol that is referenced in a dynamic relocation must be
- // present in the primary GOT.
- this->primary_got_->set_global_gotno(this->master_got_info_->global_gotno());
- // Add GOT entries.
- unsigned int i = 0;
- unsigned int offset = 0;
- Mips_got_info<size, big_endian>* g = this->primary_got_;
- do
- {
- g->set_index(i);
- g->set_offset(offset);
- g->add_local_entries(this->target_, layout);
- if (i == 0)
- g->add_global_entries(this->target_, layout,
- (this->master_got_info_->global_gotno()
- - this->master_got_info_->reloc_only_gotno()));
- else
- g->add_global_entries(this->target_, layout, /*not used*/-1U);
- g->add_tls_entries(this->target_, layout);
- // Forbid global symbols in every non-primary GOT from having
- // lazy-binding stubs.
- if (i > 0)
- g->remove_lazy_stubs(this->target_);
- ++i;
- offset += g->got_size();
- g = g->next();
- }
- while (g);
- }
- // Attempt to merge GOTs of different input objects. Try to use as much as
- // possible of the primary GOT, since it doesn't require explicit dynamic
- // relocations, but don't use objects that would reference global symbols
- // out of the addressable range. Failing the primary GOT, attempt to merge
- // with the current GOT, or finish the current GOT and then make make the new
- // GOT current.
- template<int size, bool big_endian>
- void
- Mips_output_data_got<size, big_endian>::merge_gots(
- const Input_objects* input_objects)
- {
- gold_assert(this->primary_got_ == NULL);
- Mips_got_info<size, big_endian>* current = NULL;
- for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
- p != input_objects->relobj_end();
- ++p)
- {
- Mips_relobj<size, big_endian>* object =
- Mips_relobj<size, big_endian>::as_mips_relobj(*p);
- Mips_got_info<size, big_endian>* g = object->get_got_info();
- if (g == NULL)
- continue;
- g->count_got_entries();
- // Work out the number of page, local and TLS entries.
- unsigned int estimate = this->master_got_info_->page_gotno();
- if (estimate > g->page_gotno())
- estimate = g->page_gotno();
- estimate += g->local_gotno() + g->tls_gotno();
- // We place TLS GOT entries after both locals and globals. The globals
- // for the primary GOT may overflow the normal GOT size limit, so be
- // sure not to merge a GOT which requires TLS with the primary GOT in that
- // case. This doesn't affect non-primary GOTs.
- estimate += (g->tls_gotno() > 0 ? this->master_got_info_->global_gotno()
- : g->global_gotno());
- unsigned int max_count =
- Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE / (size/8) - 2;
- if (estimate <= max_count)
- {
- // If we don't have a primary GOT, use it as
- // a starting point for the primary GOT.
- if (!this->primary_got_)
- {
- this->primary_got_ = g;
- continue;
- }
- // Try merging with the primary GOT.
- if (this->merge_got_with(g, object, this->primary_got_))
- continue;
- }
- // If we can merge with the last-created GOT, do it.
- if (current && this->merge_got_with(g, object, current))
- continue;
- // Well, we couldn't merge, so create a new GOT. Don't check if it
- // fits; if it turns out that it doesn't, we'll get relocation
- // overflows anyway.
- g->set_next(current);
- current = g;
- }
- // If we do not find any suitable primary GOT, create an empty one.
- if (this->primary_got_ == NULL)
- this->primary_got_ = new Mips_got_info<size, big_endian>();
- // Link primary GOT with secondary GOTs.
- this->primary_got_->set_next(current);
- }
- // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if
- // this would lead to overflow, true if they were merged successfully.
- template<int size, bool big_endian>
- bool
- Mips_output_data_got<size, big_endian>::merge_got_with(
- Mips_got_info<size, big_endian>* from,
- Mips_relobj<size, big_endian>* object,
- Mips_got_info<size, big_endian>* to)
- {
- // Work out how many page entries we would need for the combined GOT.
- unsigned int estimate = this->master_got_info_->page_gotno();
- if (estimate >= from->page_gotno() + to->page_gotno())
- estimate = from->page_gotno() + to->page_gotno();
- // Conservatively estimate how many local and TLS entries would be needed.
- estimate += from->local_gotno() + to->local_gotno();
- estimate += from->tls_gotno() + to->tls_gotno();
- // If we're merging with the primary got, any TLS relocations will
- // come after the full set of global entries. Otherwise estimate those
- // conservatively as well.
- if (to == this->primary_got_ && (from->tls_gotno() + to->tls_gotno()) > 0)
- estimate += this->master_got_info_->global_gotno();
- else
- estimate += from->global_gotno() + to->global_gotno();
- // Bail out if the combined GOT might be too big.
- unsigned int max_count =
- Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE / (size/8) - 2;
- if (estimate > max_count)
- return false;
- // Transfer the object's GOT information from FROM to TO.
- to->add_got_entries(from);
- to->add_got_page_count(from);
- // Record that OBJECT should use output GOT TO.
- object->set_got_info(to);
- return true;
- }
- // Write out the GOT.
- template<int size, bool big_endian>
- void
- Mips_output_data_got<size, big_endian>::do_write(Output_file* of)
- {
- typedef Unordered_set<Mips_symbol<size>*, Mips_symbol_hash<size> >
- Mips_stubs_entry_set;
- // Call parent to write out GOT.
- Output_data_got<size, big_endian>::do_write(of);
- const off_t offset = this->offset();
- const section_size_type oview_size =
- convert_to_section_size_type(this->data_size());
- unsigned char* const oview = of->get_output_view(offset, oview_size);
- // Needed for fixing values of .got section.
- this->got_view_ = oview;
- // Write lazy stub addresses.
- for (typename Mips_stubs_entry_set::iterator
- p = this->master_got_info_->global_got_symbols().begin();
- p != this->master_got_info_->global_got_symbols().end();
- ++p)
- {
- Mips_symbol<size>* mips_sym = *p;
- if (mips_sym->has_lazy_stub())
- {
- Valtype* wv = reinterpret_cast<Valtype*>(
- oview + this->get_primary_got_offset(mips_sym));
- Valtype value =
- this->target_->mips_stubs_section()->stub_address(mips_sym);
- elfcpp::Swap<size, big_endian>::writeval(wv, value);
- }
- }
- // Add +1 to GGA_NONE nonzero MIPS16 and microMIPS entries.
- for (typename Mips_stubs_entry_set::iterator
- p = this->master_got_info_->global_got_symbols().begin();
- p != this->master_got_info_->global_got_symbols().end();
- ++p)
- {
- Mips_symbol<size>* mips_sym = *p;
- if (!this->multi_got()
- && (mips_sym->is_mips16() || mips_sym->is_micromips())
- && mips_sym->global_got_area() == GGA_NONE
- && mips_sym->has_got_offset(GOT_TYPE_STANDARD))
- {
- Valtype* wv = reinterpret_cast<Valtype*>(
- oview + mips_sym->got_offset(GOT_TYPE_STANDARD));
- Valtype value = elfcpp::Swap<size, big_endian>::readval(wv);
- if (value != 0)
- {
- value |= 1;
- elfcpp::Swap<size, big_endian>::writeval(wv, value);
- }
- }
- }
- if (!this->secondary_got_relocs_.empty())
- {
- // Fixup for the secondary GOT R_MIPS_REL32 relocs. For global
- // secondary GOT entries with non-zero initial value copy the value
- // to the corresponding primary GOT entry, and set the secondary GOT
- // entry to zero.
- // TODO(sasa): This is workaround. It needs to be investigated further.
- for (size_t i = 0; i < this->secondary_got_relocs_.size(); ++i)
- {
- Static_reloc& reloc(this->secondary_got_relocs_[i]);
- if (reloc.symbol_is_global())
- {
- Mips_symbol<size>* gsym = reloc.symbol();
- gold_assert(gsym != NULL);
- unsigned got_offset = reloc.got_offset();
- gold_assert(got_offset < oview_size);
- // Find primary GOT entry.
- Valtype* wv_prim = reinterpret_cast<Valtype*>(
- oview + this->get_primary_got_offset(gsym));
- // Find secondary GOT entry.
- Valtype* wv_sec = reinterpret_cast<Valtype*>(oview + got_offset);
- Valtype value = elfcpp::Swap<size, big_endian>::readval(wv_sec);
- if (value != 0)
- {
- elfcpp::Swap<size, big_endian>::writeval(wv_prim, value);
- elfcpp::Swap<size, big_endian>::writeval(wv_sec, 0);
- gsym->set_applied_secondary_got_fixup();
- }
- }
- }
- of->write_output_view(offset, oview_size, oview);
- }
- // We are done if there is no fix up.
- if (this->static_relocs_.empty())
- return;
- Output_segment* tls_segment = this->layout_->tls_segment();
- gold_assert(tls_segment != NULL);
- for (size_t i = 0; i < this->static_relocs_.size(); ++i)
- {
- Static_reloc& reloc(this->static_relocs_[i]);
- Mips_address value;
- if (!reloc.symbol_is_global())
- {
- Sized_relobj_file<size, big_endian>* object = reloc.relobj();
- const Symbol_value<size>* psymval =
- object->local_symbol(reloc.index());
- // We are doing static linking. Issue an error and skip this
- // relocation if the symbol is undefined or in a discarded_section.
- bool is_ordinary;
- unsigned int shndx = psymval->input_shndx(&is_ordinary);
- if ((shndx == elfcpp::SHN_UNDEF)
- || (is_ordinary
- && shndx != elfcpp::SHN_UNDEF
- && !object->is_section_included(shndx)
- && !this->symbol_table_->is_section_folded(object, shndx)))
- {
- gold_error(_("undefined or discarded local symbol %u from "
- " object %s in GOT"),
- reloc.index(), reloc.relobj()->name().c_str());
- continue;
- }
- value = psymval->value(object, 0);
- }
- else
- {
- const Mips_symbol<size>* gsym = reloc.symbol();
- gold_assert(gsym != NULL);
- // We are doing static linking. Issue an error and skip this
- // relocation if the symbol is undefined or in a discarded_section
- // unless it is a weakly_undefined symbol.
- if ((gsym->is_defined_in_discarded_section() || gsym->is_undefined())
- && !gsym->is_weak_undefined())
- {
- gold_error(_("undefined or discarded symbol %s in GOT"),
- gsym->name());
- continue;
- }
- if (!gsym->is_weak_undefined())
- value = gsym->value();
- else
- value = 0;
- }
- unsigned got_offset = reloc.got_offset();
- gold_assert(got_offset < oview_size);
- Valtype* wv = reinterpret_cast<Valtype*>(oview + got_offset);
- Valtype x;
- switch (reloc.r_type())
- {
- case elfcpp::R_MIPS_TLS_DTPMOD32:
- case elfcpp::R_MIPS_TLS_DTPMOD64:
- x = value;
- break;
- case elfcpp::R_MIPS_TLS_DTPREL32:
- case elfcpp::R_MIPS_TLS_DTPREL64:
- x = value - elfcpp::DTP_OFFSET;
- break;
- case elfcpp::R_MIPS_TLS_TPREL32:
- case elfcpp::R_MIPS_TLS_TPREL64:
- x = value - elfcpp::TP_OFFSET;
- break;
- default:
- gold_unreachable();
- break;
- }
- elfcpp::Swap<size, big_endian>::writeval(wv, x);
- }
- of->write_output_view(offset, oview_size, oview);
- }
- // Mips_relobj methods.
- // Count the local symbols. The Mips backend needs to know if a symbol
- // is a MIPS16 or microMIPS function or not. For global symbols, it is easy
- // because the Symbol object keeps the ELF symbol type and st_other field.
- // For local symbol it is harder because we cannot access this information.
- // So we override the do_count_local_symbol in parent and scan local symbols to
- // mark MIPS16 and microMIPS functions. This is not the most efficient way but
- // I do not want to slow down other ports by calling a per symbol target hook
- // inside Sized_relobj_file<size, big_endian>::do_count_local_symbols.
- template<int size, bool big_endian>
- void
- Mips_relobj<size, big_endian>::do_count_local_symbols(
- Stringpool_template<char>* pool,
- Stringpool_template<char>* dynpool)
- {
- // Ask parent to count the local symbols.
- Sized_relobj_file<size, big_endian>::do_count_local_symbols(pool, dynpool);
- const unsigned int loccount = this->local_symbol_count();
- if (loccount == 0)
- return;
- // Initialize the mips16 and micromips function bit-vector.
- this->local_symbol_is_mips16_.resize(loccount, false);
- this->local_symbol_is_micromips_.resize(loccount, false);
- // Read the symbol table section header.
- const unsigned int symtab_shndx = this->symtab_shndx();
- elfcpp::Shdr<size, big_endian>
- symtabshdr(this, this->elf_file()->section_header(symtab_shndx));
- gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
- // Read the local symbols.
- const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
- gold_assert(loccount == symtabshdr.get_sh_info());
- off_t locsize = loccount * sym_size;
- const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
- locsize, true, true);
- // Loop over the local symbols and mark any MIPS16 or microMIPS local symbols.
- // Skip the first dummy symbol.
- psyms += sym_size;
- for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
- {
- elfcpp::Sym<size, big_endian> sym(psyms);
- unsigned char st_other = sym.get_st_other();
- this->local_symbol_is_mips16_[i] = elfcpp::elf_st_is_mips16(st_other);
- this->local_symbol_is_micromips_[i] =
- elfcpp::elf_st_is_micromips(st_other);
- }
- }
- // Read the symbol information.
- template<int size, bool big_endian>
- void
- Mips_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
- {
- // Call parent class to read symbol information.
- this->base_read_symbols(sd);
- // If this input file is a binary file, it has no processor
- // specific data.
- Input_file::Format format = this->input_file()->format();
- if (format != Input_file::FORMAT_ELF)
- {
- gold_assert(format == Input_file::FORMAT_BINARY);
- this->merge_processor_specific_data_ = false;
- return;
- }
- // Read processor-specific flags in ELF file header.
- const unsigned char* pehdr = this->get_view(elfcpp::file_header_offset,
- elfcpp::Elf_sizes<size>::ehdr_size,
- true, false);
- elfcpp::Ehdr<size, big_endian> ehdr(pehdr);
- this->processor_specific_flags_ = ehdr.get_e_flags();
- // Get the section names.
- const unsigned char* pnamesu = sd->section_names->data();
- const char* pnames = reinterpret_cast<const char*>(pnamesu);
- // Initialize the mips16 stub section bit-vectors.
- this->section_is_mips16_fn_stub_.resize(this->shnum(), false);
- this->section_is_mips16_call_stub_.resize(this->shnum(), false);
- this->section_is_mips16_call_fp_stub_.resize(this->shnum(), false);
- const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
- const unsigned char* pshdrs = sd->section_headers->data();
- const unsigned char* ps = pshdrs + shdr_size;
- bool must_merge_processor_specific_data = false;
- for (unsigned int i = 1; i < this->shnum(); ++i, ps += shdr_size)
- {
- elfcpp::Shdr<size, big_endian> shdr(ps);
- // Sometimes an object has no contents except the section name string
- // table and an empty symbol table with the undefined symbol. We
- // don't want to merge processor-specific data from such an object.
- if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB)
- {
- // Symbol table is not empty.
- const typename elfcpp::Elf_types<size>::Elf_WXword sym_size =
- elfcpp::Elf_sizes<size>::sym_size;
- if (shdr.get_sh_size() > sym_size)
- must_merge_processor_specific_data = true;
- }
- else if (shdr.get_sh_type() != elfcpp::SHT_STRTAB)
- // If this is neither an empty symbol table nor a string table,
- // be conservative.
- must_merge_processor_specific_data = true;
- if (shdr.get_sh_type() == elfcpp::SHT_MIPS_REGINFO)
- {
- this->has_reginfo_section_ = true;
- // Read the gp value that was used to create this object. We need the
- // gp value while processing relocs. The .reginfo section is not used
- // in the 64-bit MIPS ELF ABI.
- section_offset_type section_offset = shdr.get_sh_offset();
- section_size_type section_size =
- convert_to_section_size_type(shdr.get_sh_size());
- const unsigned char* view =
- this->get_view(section_offset, section_size, true, false);
- this->gp_ = elfcpp::Swap<size, big_endian>::readval(view + 20);
- // Read the rest of .reginfo.
- this->gprmask_ = elfcpp::Swap<size, big_endian>::readval(view);
- this->cprmask1_ = elfcpp::Swap<size, big_endian>::readval(view + 4);
- this->cprmask2_ = elfcpp::Swap<size, big_endian>::readval(view + 8);
- this->cprmask3_ = elfcpp::Swap<size, big_endian>::readval(view + 12);
- this->cprmask4_ = elfcpp::Swap<size, big_endian>::readval(view + 16);
- }
- if (shdr.get_sh_type() == elfcpp::SHT_GNU_ATTRIBUTES)
- {
- gold_assert(this->attributes_section_data_ == NULL);
- section_offset_type section_offset = shdr.get_sh_offset();
- section_size_type section_size =
- convert_to_section_size_type(shdr.get_sh_size());
- const unsigned char* view =
- this->get_view(section_offset, section_size, true, false);
- this->attributes_section_data_ =
- new Attributes_section_data(view, section_size);
- }
- if (shdr.get_sh_type() == elfcpp::SHT_MIPS_ABIFLAGS)
- {
- gold_assert(this->abiflags_ == NULL);
- section_offset_type section_offset = shdr.get_sh_offset();
- section_size_type section_size =
- convert_to_section_size_type(shdr.get_sh_size());
- const unsigned char* view =
- this->get_view(section_offset, section_size, true, false);
- this->abiflags_ = new Mips_abiflags<big_endian>();
- this->abiflags_->version =
- elfcpp::Swap<16, big_endian>::readval(view);
- if (this->abiflags_->version != 0)
- {
- gold_error(_("%s: .MIPS.abiflags section has "
- "unsupported version %u"),
- this->name().c_str(),
- this->abiflags_->version);
- break;
- }
- this->abiflags_->isa_level =
- elfcpp::Swap<8, big_endian>::readval(view + 2);
- this->abiflags_->isa_rev =
- elfcpp::Swap<8, big_endian>::readval(view + 3);
- this->abiflags_->gpr_size =
- elfcpp::Swap<8, big_endian>::readval(view + 4);
- this->abiflags_->cpr1_size =
- elfcpp::Swap<8, big_endian>::readval(view + 5);
- this->abiflags_->cpr2_size =
- elfcpp::Swap<8, big_endian>::readval(view + 6);
- this->abiflags_->fp_abi =
- elfcpp::Swap<8, big_endian>::readval(view + 7);
- this->abiflags_->isa_ext =
- elfcpp::Swap<32, big_endian>::readval(view + 8);
- this->abiflags_->ases =
- elfcpp::Swap<32, big_endian>::readval(view + 12);
- this->abiflags_->flags1 =
- elfcpp::Swap<32, big_endian>::readval(view + 16);
- this->abiflags_->flags2 =
- elfcpp::Swap<32, big_endian>::readval(view + 20);
- }
- // In the 64-bit ABI, .MIPS.options section holds register information.
- // A SHT_MIPS_OPTIONS section contains a series of options, each of which
- // starts with this header:
- //
- // typedef struct
- // {
- // // Type of option.
- // unsigned char kind[1];
- // // Size of option descriptor, including header.
- // unsigned char size[1];
- // // Section index of affected section, or 0 for global option.
- // unsigned char section[2];
- // // Information specific to this kind of option.
- // unsigned char info[4];
- // };
- //
- // For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and set
- // the gp value based on what we find. We may see both SHT_MIPS_REGINFO
- // and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case, they should agree.
- if (shdr.get_sh_type() == elfcpp::SHT_MIPS_OPTIONS)
- {
- section_offset_type section_offset = shdr.get_sh_offset();
- section_size_type section_size =
- convert_to_section_size_type(shdr.get_sh_size());
- const unsigned char* view =
- this->get_view(section_offset, section_size, true, false);
- const unsigned char* end = view + section_size;
- while (view + 8 <= end)
- {
- unsigned char kind = elfcpp::Swap<8, big_endian>::readval(view);
- unsigned char sz = elfcpp::Swap<8, big_endian>::readval(view + 1);
- if (sz < 8)
- {
- gold_error(_("%s: Warning: bad `%s' option size %u smaller "
- "than its header"),
- this->name().c_str(),
- this->mips_elf_options_section_name(), sz);
- break;
- }
- if (this->is_n64() && kind == elfcpp::ODK_REGINFO)
- {
- // In the 64 bit ABI, an ODK_REGINFO option is the following
- // structure. The info field of the options header is not
- // used.
- //
- // typedef struct
- // {
- // // Mask of general purpose registers used.
- // unsigned char ri_gprmask[4];
- // // Padding.
- // unsigned char ri_pad[4];
- // // Mask of co-processor registers used.
- // unsigned char ri_cprmask[4][4];
- // // GP register value for this object file.
- // unsigned char ri_gp_value[8];
- // };
- this->gp_ = elfcpp::Swap<size, big_endian>::readval(view
- + 32);
- }
- else if (kind == elfcpp::ODK_REGINFO)
- {
- // In the 32 bit ABI, an ODK_REGINFO option is the following
- // structure. The info field of the options header is not
- // used. The same structure is used in .reginfo section.
- //
- // typedef struct
- // {
- // unsigned char ri_gprmask[4];
- // unsigned char ri_cprmask[4][4];
- // unsigned char ri_gp_value[4];
- // };
- this->gp_ = elfcpp::Swap<size, big_endian>::readval(view
- + 28);
- }
- view += sz;
- }
- }
- const char* name = pnames + shdr.get_sh_name();
- this->section_is_mips16_fn_stub_[i] = is_prefix_of(".mips16.fn", name);
- this->section_is_mips16_call_stub_[i] =
- is_prefix_of(".mips16.call.", name);
- this->section_is_mips16_call_fp_stub_[i] =
- is_prefix_of(".mips16.call.fp.", name);
- if (strcmp(name, ".pdr") == 0)
- {
- gold_assert(this->pdr_shndx_ == -1U);
- this->pdr_shndx_ = i;
- }
- }
- // This is rare.
- if (!must_merge_processor_specific_data)
- this->merge_processor_specific_data_ = false;
- }
- // Discard MIPS16 stub secions that are not needed.
- template<int size, bool big_endian>
- void
- Mips_relobj<size, big_endian>::discard_mips16_stub_sections(Symbol_table* symtab)
- {
- for (typename Mips16_stubs_int_map::const_iterator
- it = this->mips16_stub_sections_.begin();
- it != this->mips16_stub_sections_.end(); ++it)
- {
- Mips16_stub_section<size, big_endian>* stub_section = it->second;
- if (!stub_section->is_target_found())
- {
- gold_error(_("no relocation found in mips16 stub section '%s'"),
- stub_section->object()
- ->section_name(stub_section->shndx()).c_str());
- }
- bool discard = false;
- if (stub_section->is_for_local_function())
- {
- if (stub_section->is_fn_stub())
- {
- // This stub is for a local symbol. This stub will only
- // be needed if there is some relocation in this object,
- // other than a 16 bit function call, which refers to this
- // symbol.
- if (!this->has_local_non_16bit_call_relocs(stub_section->r_sym()))
- discard = true;
- else
- this->add_local_mips16_fn_stub(stub_section);
- }
- else
- {
- // This stub is for a local symbol. This stub will only
- // be needed if there is some relocation (R_MIPS16_26) in
- // this object that refers to this symbol.
- gold_assert(stub_section->is_call_stub()
- || stub_section->is_call_fp_stub());
- if (!this->has_local_16bit_call_relocs(stub_section->r_sym()))
- discard = true;
- else
- this->add_local_mips16_call_stub(stub_section);
- }
- }
- else
- {
- Mips_symbol<size>* gsym = stub_section->gsym();
- if (stub_section->is_fn_stub())
- {
- if (gsym->has_mips16_fn_stub())
- // We already have a stub for this function.
- discard = true;
- else
- {
- gsym->set_mips16_fn_stub(stub_section);
- if (gsym->should_add_dynsym_entry(symtab))
- {
- // If we have a MIPS16 function with a stub, the
- // dynamic symbol must refer to the stub, since only
- // the stub uses the standard calling conventions.
- gsym->set_need_fn_stub();
- if (gsym->is_from_dynobj())
- gsym->set_needs_dynsym_value();
- }
- }
- if (!gsym->need_fn_stub())
- discard = true;
- }
- else if (stub_section->is_call_stub())
- {
- if (gsym->is_mips16())
- // We don't need the call_stub; this is a 16 bit
- // function, so calls from other 16 bit functions are
- // OK.
- discard = true;
- else if (gsym->has_mips16_call_stub())
- // We already have a stub for this function.
- discard = true;
- else
- gsym->set_mips16_call_stub(stub_section);
- }
- else
- {
- gold_assert(stub_section->is_call_fp_stub());
- if (gsym->is_mips16())
- // We don't need the call_stub; this is a 16 bit
- // function, so calls from other 16 bit functions are
- // OK.
- discard = true;
- else if (gsym->has_mips16_call_fp_stub())
- // We already have a stub for this function.
- discard = true;
- else
- gsym->set_mips16_call_fp_stub(stub_section);
- }
- }
- if (discard)
- this->set_output_section(stub_section->shndx(), NULL);
- }
- }
- // Mips_output_data_la25_stub methods.
- // Template for standard LA25 stub.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_la25_stub<size, big_endian>::la25_stub_entry[] =
- {
- 0x3c190000, // lui $25,%hi(func)
- 0x08000000, // j func
- 0x27390000, // add $25,$25,%lo(func)
- 0x00000000 // nop
- };
- // Template for microMIPS LA25 stub.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_la25_stub<size, big_endian>::la25_stub_micromips_entry[] =
- {
- 0x41b9, 0x0000, // lui t9,%hi(func)
- 0xd400, 0x0000, // j func
- 0x3339, 0x0000, // addiu t9,t9,%lo(func)
- 0x0000, 0x0000 // nop
- };
- // Create la25 stub for a symbol.
- template<int size, bool big_endian>
- void
- Mips_output_data_la25_stub<size, big_endian>::create_la25_stub(
- Symbol_table* symtab, Target_mips<size, big_endian>* target,
- Mips_symbol<size>* gsym)
- {
- if (!gsym->has_la25_stub())
- {
- gsym->set_la25_stub_offset(this->symbols_.size() * 16);
- this->symbols_.push_back(gsym);
- this->create_stub_symbol(gsym, symtab, target, 16);
- }
- }
- // Create a symbol for SYM stub's value and size, to help make the disassembly
- // easier to read.
- template<int size, bool big_endian>
- void
- Mips_output_data_la25_stub<size, big_endian>::create_stub_symbol(
- Mips_symbol<size>* sym, Symbol_table* symtab,
- Target_mips<size, big_endian>* target, uint64_t symsize)
- {
- std::string name(".pic.");
- name += sym->name();
- unsigned int offset = sym->la25_stub_offset();
- if (sym->is_micromips())
- offset |= 1;
- // Make it a local function.
- Symbol* new_sym = symtab->define_in_output_data(name.c_str(), NULL,
- Symbol_table::PREDEFINED,
- target->la25_stub_section(),
- offset, symsize, elfcpp::STT_FUNC,
- elfcpp::STB_LOCAL,
- elfcpp::STV_DEFAULT, 0,
- false, false);
- new_sym->set_is_forced_local();
- }
- // Write out la25 stubs. This uses the hand-coded instructions above,
- // and adjusts them as needed.
- template<int size, bool big_endian>
- void
- Mips_output_data_la25_stub<size, big_endian>::do_write(Output_file* of)
- {
- const off_t offset = this->offset();
- const section_size_type oview_size =
- convert_to_section_size_type(this->data_size());
- unsigned char* const oview = of->get_output_view(offset, oview_size);
- for (typename std::vector<Mips_symbol<size>*>::iterator
- p = this->symbols_.begin();
- p != this->symbols_.end();
- ++p)
- {
- Mips_symbol<size>* sym = *p;
- unsigned char* pov = oview + sym->la25_stub_offset();
- Mips_address target = sym->value();
- if (!sym->is_micromips())
- {
- elfcpp::Swap<32, big_endian>::writeval(pov,
- la25_stub_entry[0] | (((target + 0x8000) >> 16) & 0xffff));
- elfcpp::Swap<32, big_endian>::writeval(pov + 4,
- la25_stub_entry[1] | ((target >> 2) & 0x3ffffff));
- elfcpp::Swap<32, big_endian>::writeval(pov + 8,
- la25_stub_entry[2] | (target & 0xffff));
- elfcpp::Swap<32, big_endian>::writeval(pov + 12, la25_stub_entry[3]);
- }
- else
- {
- target |= 1;
- // First stub instruction. Paste high 16-bits of the target.
- elfcpp::Swap<16, big_endian>::writeval(pov,
- la25_stub_micromips_entry[0]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 2,
- ((target + 0x8000) >> 16) & 0xffff);
- // Second stub instruction. Paste low 26-bits of the target, shifted
- // right by 1.
- elfcpp::Swap<16, big_endian>::writeval(pov + 4,
- la25_stub_micromips_entry[2] | ((target >> 17) & 0x3ff));
- elfcpp::Swap<16, big_endian>::writeval(pov + 6,
- la25_stub_micromips_entry[3] | ((target >> 1) & 0xffff));
- // Third stub instruction. Paste low 16-bits of the target.
- elfcpp::Swap<16, big_endian>::writeval(pov + 8,
- la25_stub_micromips_entry[4]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 10, target & 0xffff);
- // Fourth stub instruction.
- elfcpp::Swap<16, big_endian>::writeval(pov + 12,
- la25_stub_micromips_entry[6]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 14,
- la25_stub_micromips_entry[7]);
- }
- }
- of->write_output_view(offset, oview_size, oview);
- }
- // Mips_output_data_plt methods.
- // The format of the first PLT entry in an O32 executable.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_o32[] =
- {
- 0x3c1c0000, // lui $28, %hi(&GOTPLT[0])
- 0x8f990000, // lw $25, %lo(&GOTPLT[0])($28)
- 0x279c0000, // addiu $28, $28, %lo(&GOTPLT[0])
- 0x031cc023, // subu $24, $24, $28
- 0x03e07825, // or $15, $31, zero
- 0x0018c082, // srl $24, $24, 2
- 0x0320f809, // jalr $25
- 0x2718fffe // subu $24, $24, 2
- };
- // The format of the first PLT entry in an N32 executable. Different
- // because gp ($28) is not available; we use t2 ($14) instead.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_n32[] =
- {
- 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
- 0x8dd90000, // lw $25, %lo(&GOTPLT[0])($14)
- 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
- 0x030ec023, // subu $24, $24, $14
- 0x03e07825, // or $15, $31, zero
- 0x0018c082, // srl $24, $24, 2
- 0x0320f809, // jalr $25
- 0x2718fffe // subu $24, $24, 2
- };
- // The format of the first PLT entry in an N64 executable. Different
- // from N32 because of the increased size of GOT entries.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_n64[] =
- {
- 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
- 0xddd90000, // ld $25, %lo(&GOTPLT[0])($14)
- 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
- 0x030ec023, // subu $24, $24, $14
- 0x03e07825, // or $15, $31, zero
- 0x0018c0c2, // srl $24, $24, 3
- 0x0320f809, // jalr $25
- 0x2718fffe // subu $24, $24, 2
- };
- // The format of the microMIPS first PLT entry in an O32 executable.
- // We rely on v0 ($2) rather than t8 ($24) to contain the address
- // of the GOTPLT entry handled, so this stub may only be used when
- // all the subsequent PLT entries are microMIPS code too.
- //
- // The trailing NOP is for alignment and correct disassembly only.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::
- plt0_entry_micromips_o32[] =
- {
- 0x7980, 0x0000, // addiupc $3, (&GOTPLT[0]) - .
- 0xff23, 0x0000, // lw $25, 0($3)
- 0x0535, // subu $2, $2, $3
- 0x2525, // srl $2, $2, 2
- 0x3302, 0xfffe, // subu $24, $2, 2
- 0x0dff, // move $15, $31
- 0x45f9, // jalrs $25
- 0x0f83, // move $28, $3
- 0x0c00 // nop
- };
- // The format of the microMIPS first PLT entry in an O32 executable
- // in the insn32 mode.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::
- plt0_entry_micromips32_o32[] =
- {
- 0x41bc, 0x0000, // lui $28, %hi(&GOTPLT[0])
- 0xff3c, 0x0000, // lw $25, %lo(&GOTPLT[0])($28)
- 0x339c, 0x0000, // addiu $28, $28, %lo(&GOTPLT[0])
- 0x0398, 0xc1d0, // subu $24, $24, $28
- 0x001f, 0x7a90, // or $15, $31, zero
- 0x0318, 0x1040, // srl $24, $24, 2
- 0x03f9, 0x0f3c, // jalr $25
- 0x3318, 0xfffe // subu $24, $24, 2
- };
- // The format of subsequent standard entries in the PLT.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry[] =
- {
- 0x3c0f0000, // lui $15, %hi(.got.plt entry)
- 0x01f90000, // l[wd] $25, %lo(.got.plt entry)($15)
- 0x03200008, // jr $25
- 0x25f80000 // addiu $24, $15, %lo(.got.plt entry)
- };
- // The format of subsequent R6 PLT entries.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry_r6[] =
- {
- 0x3c0f0000, // lui $15, %hi(.got.plt entry)
- 0x01f90000, // l[wd] $25, %lo(.got.plt entry)($15)
- 0x03200009, // jr $25
- 0x25f80000 // addiu $24, $15, %lo(.got.plt entry)
- };
- // The format of subsequent MIPS16 o32 PLT entries. We use v1 ($3) as a
- // temporary because t8 ($24) and t9 ($25) are not directly addressable.
- // Note that this differs from the GNU ld which uses both v0 ($2) and v1 ($3).
- // We cannot use v0 because MIPS16 call stubs from the CS toolchain expect
- // target function address in register v0.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry_mips16_o32[] =
- {
- 0xb303, // lw $3, 12($pc)
- 0x651b, // move $24, $3
- 0x9b60, // lw $3, 0($3)
- 0xeb00, // jr $3
- 0x653b, // move $25, $3
- 0x6500, // nop
- 0x0000, 0x0000 // .word (.got.plt entry)
- };
- // The format of subsequent microMIPS o32 PLT entries. We use v0 ($2)
- // as a temporary because t8 ($24) is not addressable with ADDIUPC.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::
- plt_entry_micromips_o32[] =
- {
- 0x7900, 0x0000, // addiupc $2, (.got.plt entry) - .
- 0xff22, 0x0000, // lw $25, 0($2)
- 0x4599, // jr $25
- 0x0f02 // move $24, $2
- };
- // The format of subsequent microMIPS o32 PLT entries in the insn32 mode.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_plt<size, big_endian>::
- plt_entry_micromips32_o32[] =
- {
- 0x41af, 0x0000, // lui $15, %hi(.got.plt entry)
- 0xff2f, 0x0000, // lw $25, %lo(.got.plt entry)($15)
- 0x0019, 0x0f3c, // jr $25
- 0x330f, 0x0000 // addiu $24, $15, %lo(.got.plt entry)
- };
- // Add an entry to the PLT for a symbol referenced by r_type relocation.
- template<int size, bool big_endian>
- void
- Mips_output_data_plt<size, big_endian>::add_entry(Mips_symbol<size>* gsym,
- unsigned int r_type)
- {
- gold_assert(!gsym->has_plt_offset());
- // Final PLT offset for a symbol will be set in method set_plt_offsets().
- gsym->set_plt_offset(this->entry_count() * sizeof(plt_entry)
- + sizeof(plt0_entry_o32));
- this->symbols_.push_back(gsym);
- // Record whether the relocation requires a standard MIPS
- // or a compressed code entry.
- if (jal_reloc(r_type))
- {
- if (r_type == elfcpp::R_MIPS_26)
- gsym->set_needs_mips_plt(true);
- else
- gsym->set_needs_comp_plt(true);
- }
- section_offset_type got_offset = this->got_plt_->current_data_size();
- // Every PLT entry needs a GOT entry which points back to the PLT
- // entry (this will be changed by the dynamic linker, normally
- // lazily when the function is called).
- this->got_plt_->set_current_data_size(got_offset + size/8);
- gsym->set_needs_dynsym_entry();
- this->rel_->add_global(gsym, elfcpp::R_MIPS_JUMP_SLOT, this->got_plt_,
- got_offset);
- }
- // Set final PLT offsets. For each symbol, determine whether standard or
- // compressed (MIPS16 or microMIPS) PLT entry is used.
- template<int size, bool big_endian>
- void
- Mips_output_data_plt<size, big_endian>::set_plt_offsets()
- {
- // The sizes of individual PLT entries.
- unsigned int plt_mips_entry_size = this->standard_plt_entry_size();
- unsigned int plt_comp_entry_size = (!this->target_->is_output_newabi()
- ? this->compressed_plt_entry_size() : 0);
- for (typename std::vector<Mips_symbol<size>*>::const_iterator
- p = this->symbols_.begin(); p != this->symbols_.end(); ++p)
- {
- Mips_symbol<size>* mips_sym = *p;
- // There are no defined MIPS16 or microMIPS PLT entries for n32 or n64,
- // so always use a standard entry there.
- //
- // If the symbol has a MIPS16 call stub and gets a PLT entry, then
- // all MIPS16 calls will go via that stub, and there is no benefit
- // to having a MIPS16 entry. And in the case of call_stub a
- // standard entry actually has to be used as the stub ends with a J
- // instruction.
- if (this->target_->is_output_newabi()
- || mips_sym->has_mips16_call_stub()
- || mips_sym->has_mips16_call_fp_stub())
- {
- mips_sym->set_needs_mips_plt(true);
- mips_sym->set_needs_comp_plt(false);
- }
- // Otherwise, if there are no direct calls to the function, we
- // have a free choice of whether to use standard or compressed
- // entries. Prefer microMIPS entries if the object is known to
- // contain microMIPS code, so that it becomes possible to create
- // pure microMIPS binaries. Prefer standard entries otherwise,
- // because MIPS16 ones are no smaller and are usually slower.
- if (!mips_sym->needs_mips_plt() && !mips_sym->needs_comp_plt())
- {
- if (this->target_->is_output_micromips())
- mips_sym->set_needs_comp_plt(true);
- else
- mips_sym->set_needs_mips_plt(true);
- }
- if (mips_sym->needs_mips_plt())
- {
- mips_sym->set_mips_plt_offset(this->plt_mips_offset_);
- this->plt_mips_offset_ += plt_mips_entry_size;
- }
- if (mips_sym->needs_comp_plt())
- {
- mips_sym->set_comp_plt_offset(this->plt_comp_offset_);
- this->plt_comp_offset_ += plt_comp_entry_size;
- }
- }
- // Figure out the size of the PLT header if we know that we are using it.
- if (this->plt_mips_offset_ + this->plt_comp_offset_ != 0)
- this->plt_header_size_ = this->get_plt_header_size();
- }
- // Write out the PLT. This uses the hand-coded instructions above,
- // and adjusts them as needed.
- template<int size, bool big_endian>
- void
- Mips_output_data_plt<size, big_endian>::do_write(Output_file* of)
- {
- const off_t offset = this->offset();
- const section_size_type oview_size =
- convert_to_section_size_type(this->data_size());
- unsigned char* const oview = of->get_output_view(offset, oview_size);
- const off_t gotplt_file_offset = this->got_plt_->offset();
- const section_size_type gotplt_size =
- convert_to_section_size_type(this->got_plt_->data_size());
- unsigned char* const gotplt_view = of->get_output_view(gotplt_file_offset,
- gotplt_size);
- unsigned char* pov = oview;
- Mips_address plt_address = this->address();
- // Calculate the address of .got.plt.
- Mips_address gotplt_addr = this->got_plt_->address();
- Mips_address gotplt_addr_high = ((gotplt_addr + 0x8000) >> 16) & 0xffff;
- Mips_address gotplt_addr_low = gotplt_addr & 0xffff;
- // The PLT sequence is not safe for N64 if .got.plt's address can
- // not be loaded in two instructions.
- gold_assert((gotplt_addr & ~(Mips_address) 0x7fffffff) == 0
- || ~(gotplt_addr | 0x7fffffff) == 0);
- // Write the PLT header.
- const uint32_t* plt0_entry = this->get_plt_header_entry();
- if (plt0_entry == plt0_entry_micromips_o32)
- {
- // Write microMIPS PLT header.
- gold_assert(gotplt_addr % 4 == 0);
- Mips_address gotpc_offset = gotplt_addr - ((plt_address | 3) ^ 3);
- // ADDIUPC has a span of +/-16MB, check we're in range.
- if (gotpc_offset + 0x1000000 >= 0x2000000)
- {
- gold_error(_(".got.plt offset of %ld from .plt beyond the range of "
- "ADDIUPC"), (long)gotpc_offset);
- return;
- }
- elfcpp::Swap<16, big_endian>::writeval(pov,
- plt0_entry[0] | ((gotpc_offset >> 18) & 0x7f));
- elfcpp::Swap<16, big_endian>::writeval(pov + 2,
- (gotpc_offset >> 2) & 0xffff);
- pov += 4;
- for (unsigned int i = 2;
- i < (sizeof(plt0_entry_micromips_o32)
- / sizeof(plt0_entry_micromips_o32[0]));
- i++)
- {
- elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[i]);
- pov += 2;
- }
- }
- else if (plt0_entry == plt0_entry_micromips32_o32)
- {
- // Write microMIPS PLT header in insn32 mode.
- elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[0]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 2, gotplt_addr_high);
- elfcpp::Swap<16, big_endian>::writeval(pov + 4, plt0_entry[2]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 6, gotplt_addr_low);
- elfcpp::Swap<16, big_endian>::writeval(pov + 8, plt0_entry[4]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 10, gotplt_addr_low);
- pov += 12;
- for (unsigned int i = 6;
- i < (sizeof(plt0_entry_micromips32_o32)
- / sizeof(plt0_entry_micromips32_o32[0]));
- i++)
- {
- elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[i]);
- pov += 2;
- }
- }
- else
- {
- // Write standard PLT header.
- elfcpp::Swap<32, big_endian>::writeval(pov,
- plt0_entry[0] | gotplt_addr_high);
- elfcpp::Swap<32, big_endian>::writeval(pov + 4,
- plt0_entry[1] | gotplt_addr_low);
- elfcpp::Swap<32, big_endian>::writeval(pov + 8,
- plt0_entry[2] | gotplt_addr_low);
- pov += 12;
- for (int i = 3; i < 8; i++)
- {
- elfcpp::Swap<32, big_endian>::writeval(pov, plt0_entry[i]);
- pov += 4;
- }
- }
- unsigned char* gotplt_pov = gotplt_view;
- unsigned int got_entry_size = size/8; // TODO(sasa): MIPS_ELF_GOT_SIZE
- // The first two entries in .got.plt are reserved.
- elfcpp::Swap<size, big_endian>::writeval(gotplt_pov, 0);
- elfcpp::Swap<size, big_endian>::writeval(gotplt_pov + got_entry_size, 0);
- unsigned int gotplt_offset = 2 * got_entry_size;
- gotplt_pov += 2 * got_entry_size;
- // Calculate the address of the PLT header.
- Mips_address header_address = (plt_address
- + (this->is_plt_header_compressed() ? 1 : 0));
- // Initialize compressed PLT area view.
- unsigned char* pov2 = pov + this->plt_mips_offset_;
- // Write the PLT entries.
- for (typename std::vector<Mips_symbol<size>*>::const_iterator
- p = this->symbols_.begin();
- p != this->symbols_.end();
- ++p, gotplt_pov += got_entry_size, gotplt_offset += got_entry_size)
- {
- Mips_symbol<size>* mips_sym = *p;
- // Calculate the address of the .got.plt entry.
- uint32_t gotplt_entry_addr = (gotplt_addr + gotplt_offset);
- uint32_t gotplt_entry_addr_hi = (((gotplt_entry_addr + 0x8000) >> 16)
- & 0xffff);
- uint32_t gotplt_entry_addr_lo = gotplt_entry_addr & 0xffff;
- // Initially point the .got.plt entry at the PLT header.
- if (this->target_->is_output_n64())
- elfcpp::Swap<64, big_endian>::writeval(gotplt_pov, header_address);
- else
- elfcpp::Swap<32, big_endian>::writeval(gotplt_pov, header_address);
- // Now handle the PLT itself. First the standard entry.
- if (mips_sym->has_mips_plt_offset())
- {
- // Pick the load opcode (LW or LD).
- uint64_t load = this->target_->is_output_n64() ? 0xdc000000
- : 0x8c000000;
- const uint32_t* entry = this->target_->is_output_r6() ? plt_entry_r6
- : plt_entry;
- // Fill in the PLT entry itself.
- elfcpp::Swap<32, big_endian>::writeval(pov,
- entry[0] | gotplt_entry_addr_hi);
- elfcpp::Swap<32, big_endian>::writeval(pov + 4,
- entry[1] | gotplt_entry_addr_lo | load);
- elfcpp::Swap<32, big_endian>::writeval(pov + 8, entry[2]);
- elfcpp::Swap<32, big_endian>::writeval(pov + 12,
- entry[3] | gotplt_entry_addr_lo);
- pov += 16;
- }
- // Now the compressed entry. They come after any standard ones.
- if (mips_sym->has_comp_plt_offset())
- {
- if (!this->target_->is_output_micromips())
- {
- // Write MIPS16 PLT entry.
- const uint32_t* plt_entry = plt_entry_mips16_o32;
- elfcpp::Swap<16, big_endian>::writeval(pov2, plt_entry[0]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 2, plt_entry[1]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, plt_entry[3]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]);
- elfcpp::Swap<32, big_endian>::writeval(pov2 + 12,
- gotplt_entry_addr);
- pov2 += 16;
- }
- else if (this->target_->use_32bit_micromips_instructions())
- {
- // Write microMIPS PLT entry in insn32 mode.
- const uint32_t* plt_entry = plt_entry_micromips32_o32;
- elfcpp::Swap<16, big_endian>::writeval(pov2, plt_entry[0]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 2,
- gotplt_entry_addr_hi);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 6,
- gotplt_entry_addr_lo);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 12, plt_entry[6]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 14,
- gotplt_entry_addr_lo);
- pov2 += 16;
- }
- else
- {
- // Write microMIPS PLT entry.
- const uint32_t* plt_entry = plt_entry_micromips_o32;
- gold_assert(gotplt_entry_addr % 4 == 0);
- Mips_address loc_address = plt_address + pov2 - oview;
- int gotpc_offset = gotplt_entry_addr - ((loc_address | 3) ^ 3);
- // ADDIUPC has a span of +/-16MB, check we're in range.
- if (gotpc_offset + 0x1000000 >= 0x2000000)
- {
- gold_error(_(".got.plt offset of %ld from .plt beyond the "
- "range of ADDIUPC"), (long)gotpc_offset);
- return;
- }
- elfcpp::Swap<16, big_endian>::writeval(pov2,
- plt_entry[0] | ((gotpc_offset >> 18) & 0x7f));
- elfcpp::Swap<16, big_endian>::writeval(
- pov2 + 2, (gotpc_offset >> 2) & 0xffff);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, plt_entry[3]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]);
- elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]);
- pov2 += 12;
- }
- }
- }
- // Check the number of bytes written for standard entries.
- gold_assert(static_cast<section_size_type>(
- pov - oview - this->plt_header_size_) == this->plt_mips_offset_);
- // Check the number of bytes written for compressed entries.
- gold_assert((static_cast<section_size_type>(pov2 - pov)
- == this->plt_comp_offset_));
- // Check the total number of bytes written.
- gold_assert(static_cast<section_size_type>(pov2 - oview) == oview_size);
- gold_assert(static_cast<section_size_type>(gotplt_pov - gotplt_view)
- == gotplt_size);
- of->write_output_view(offset, oview_size, oview);
- of->write_output_view(gotplt_file_offset, gotplt_size, gotplt_view);
- }
- // Mips_output_data_mips_stubs methods.
- // The format of the lazy binding stub when dynamic symbol count is less than
- // 64K, dynamic symbol index is less than 32K, and ABI is not N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_1[4] =
- {
- 0x8f998010, // lw t9,0x8010(gp)
- 0x03e07825, // or t7,ra,zero
- 0x0320f809, // jalr t9,ra
- 0x24180000 // addiu t8,zero,DYN_INDEX sign extended
- };
- // The format of the lazy binding stub when dynamic symbol count is less than
- // 64K, dynamic symbol index is less than 32K, and ABI is N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_1_n64[4] =
- {
- 0xdf998010, // ld t9,0x8010(gp)
- 0x03e07825, // or t7,ra,zero
- 0x0320f809, // jalr t9,ra
- 0x64180000 // daddiu t8,zero,DYN_INDEX sign extended
- };
- // The format of the lazy binding stub when dynamic symbol count is less than
- // 64K, dynamic symbol index is between 32K and 64K, and ABI is not N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_2[4] =
- {
- 0x8f998010, // lw t9,0x8010(gp)
- 0x03e07825, // or t7,ra,zero
- 0x0320f809, // jalr t9,ra
- 0x34180000 // ori t8,zero,DYN_INDEX unsigned
- };
- // The format of the lazy binding stub when dynamic symbol count is less than
- // 64K, dynamic symbol index is between 32K and 64K, and ABI is N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_2_n64[4] =
- {
- 0xdf998010, // ld t9,0x8010(gp)
- 0x03e07825, // or t7,ra,zero
- 0x0320f809, // jalr t9,ra
- 0x34180000 // ori t8,zero,DYN_INDEX unsigned
- };
- // The format of the lazy binding stub when dynamic symbol count is greater than
- // 64K, and ABI is not N64.
- template<int size, bool big_endian>
- const uint32_t Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_big[5] =
- {
- 0x8f998010, // lw t9,0x8010(gp)
- 0x03e07825, // or t7,ra,zero
- 0x3c180000, // lui t8,DYN_INDEX
- 0x0320f809, // jalr t9,ra
- 0x37180000 // ori t8,t8,DYN_INDEX
- };
- // The format of the lazy binding stub when dynamic symbol count is greater than
- // 64K, and ABI is N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_big_n64[5] =
- {
- 0xdf998010, // ld t9,0x8010(gp)
- 0x03e07825, // or t7,ra,zero
- 0x3c180000, // lui t8,DYN_INDEX
- 0x0320f809, // jalr t9,ra
- 0x37180000 // ori t8,t8,DYN_INDEX
- };
- // microMIPS stubs.
- // The format of the microMIPS lazy binding stub when dynamic symbol count is
- // less than 64K, dynamic symbol index is less than 32K, and ABI is not N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_normal_1[] =
- {
- 0xff3c, 0x8010, // lw t9,0x8010(gp)
- 0x0dff, // move t7,ra
- 0x45d9, // jalr t9
- 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol count is
- // less than 64K, dynamic symbol index is less than 32K, and ABI is N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::
- lazy_stub_micromips_normal_1_n64[] =
- {
- 0xdf3c, 0x8010, // ld t9,0x8010(gp)
- 0x0dff, // move t7,ra
- 0x45d9, // jalr t9
- 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol
- // count is less than 64K, dynamic symbol index is between 32K and 64K,
- // and ABI is not N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_normal_2[] =
- {
- 0xff3c, 0x8010, // lw t9,0x8010(gp)
- 0x0dff, // move t7,ra
- 0x45d9, // jalr t9
- 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol
- // count is less than 64K, dynamic symbol index is between 32K and 64K,
- // and ABI is N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::
- lazy_stub_micromips_normal_2_n64[] =
- {
- 0xdf3c, 0x8010, // ld t9,0x8010(gp)
- 0x0dff, // move t7,ra
- 0x45d9, // jalr t9
- 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol count is
- // greater than 64K, and ABI is not N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_big[] =
- {
- 0xff3c, 0x8010, // lw t9,0x8010(gp)
- 0x0dff, // move t7,ra
- 0x41b8, 0x0000, // lui t8,DYN_INDEX
- 0x45d9, // jalr t9
- 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol count is
- // greater than 64K, and ABI is N64.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_big_n64[] =
- {
- 0xdf3c, 0x8010, // ld t9,0x8010(gp)
- 0x0dff, // move t7,ra
- 0x41b8, 0x0000, // lui t8,DYN_INDEX
- 0x45d9, // jalr t9
- 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
- };
- // 32-bit microMIPS stubs.
- // The format of the microMIPS lazy binding stub when dynamic symbol count is
- // less than 64K, dynamic symbol index is less than 32K, ABI is not N64, and we
- // can use only 32-bit instructions.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::
- lazy_stub_micromips32_normal_1[] =
- {
- 0xff3c, 0x8010, // lw t9,0x8010(gp)
- 0x001f, 0x7a90, // or t7,ra,zero
- 0x03f9, 0x0f3c, // jalr ra,t9
- 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol count is
- // less than 64K, dynamic symbol index is less than 32K, ABI is N64, and we can
- // use only 32-bit instructions.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::
- lazy_stub_micromips32_normal_1_n64[] =
- {
- 0xdf3c, 0x8010, // ld t9,0x8010(gp)
- 0x001f, 0x7a90, // or t7,ra,zero
- 0x03f9, 0x0f3c, // jalr ra,t9
- 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol
- // count is less than 64K, dynamic symbol index is between 32K and 64K,
- // ABI is not N64, and we can use only 32-bit instructions.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::
- lazy_stub_micromips32_normal_2[] =
- {
- 0xff3c, 0x8010, // lw t9,0x8010(gp)
- 0x001f, 0x7a90, // or t7,ra,zero
- 0x03f9, 0x0f3c, // jalr ra,t9
- 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol
- // count is less than 64K, dynamic symbol index is between 32K and 64K,
- // ABI is N64, and we can use only 32-bit instructions.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::
- lazy_stub_micromips32_normal_2_n64[] =
- {
- 0xdf3c, 0x8010, // ld t9,0x8010(gp)
- 0x001f, 0x7a90, // or t7,ra,zero
- 0x03f9, 0x0f3c, // jalr ra,t9
- 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol count is
- // greater than 64K, ABI is not N64, and we can use only 32-bit instructions.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips32_big[] =
- {
- 0xff3c, 0x8010, // lw t9,0x8010(gp)
- 0x001f, 0x7a90, // or t7,ra,zero
- 0x41b8, 0x0000, // lui t8,DYN_INDEX
- 0x03f9, 0x0f3c, // jalr ra,t9
- 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
- };
- // The format of the microMIPS lazy binding stub when dynamic symbol count is
- // greater than 64K, ABI is N64, and we can use only 32-bit instructions.
- template<int size, bool big_endian>
- const uint32_t
- Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips32_big_n64[] =
- {
- 0xdf3c, 0x8010, // ld t9,0x8010(gp)
- 0x001f, 0x7a90, // or t7,ra,zero
- 0x41b8, 0x0000, // lui t8,DYN_INDEX
- 0x03f9, 0x0f3c, // jalr ra,t9
- 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
- };
- // Create entry for a symbol.
- template<int size, bool big_endian>
- void
- Mips_output_data_mips_stubs<size, big_endian>::make_entry(
- Mips_symbol<size>* gsym)
- {
- if (!gsym->has_lazy_stub() && !gsym->has_plt_offset())
- {
- this->symbols_.insert(gsym);
- gsym->set_has_lazy_stub(true);
- }
- }
- // Remove entry for a symbol.
- template<int size, bool big_endian>
- void
- Mips_output_data_mips_stubs<size, big_endian>::remove_entry(
- Mips_symbol<size>* gsym)
- {
- if (gsym->has_lazy_stub())
- {
- this->symbols_.erase(gsym);
- gsym->set_has_lazy_stub(false);
- }
- }
- // Set stub offsets for symbols. This method expects that the number of
- // entries in dynamic symbol table is set.
- template<int size, bool big_endian>
- void
- Mips_output_data_mips_stubs<size, big_endian>::set_lazy_stub_offsets()
- {
- gold_assert(this->dynsym_count_ != -1U);
- if (this->stub_offsets_are_set_)
- return;
- unsigned int stub_size = this->stub_size();
- unsigned int offset = 0;
- for (typename Mips_stubs_entry_set::const_iterator
- p = this->symbols_.begin();
- p != this->symbols_.end();
- ++p, offset += stub_size)
- {
- Mips_symbol<size>* mips_sym = *p;
- mips_sym->set_lazy_stub_offset(offset);
- }
- this->stub_offsets_are_set_ = true;
- }
- template<int size, bool big_endian>
- void
- Mips_output_data_mips_stubs<size, big_endian>::set_needs_dynsym_value()
- {
- for (typename Mips_stubs_entry_set::const_iterator
- p = this->symbols_.begin(); p != this->symbols_.end(); ++p)
- {
- Mips_symbol<size>* sym = *p;
- if (sym->is_from_dynobj())
- sym->set_needs_dynsym_value();
- }
- }
- // Write out the .MIPS.stubs. This uses the hand-coded instructions and
- // adjusts them as needed.
- template<int size, bool big_endian>
- void
- Mips_output_data_mips_stubs<size, big_endian>::do_write(Output_file* of)
- {
- const off_t offset = this->offset();
- const section_size_type oview_size =
- convert_to_section_size_type(this->data_size());
- unsigned char* const oview = of->get_output_view(offset, oview_size);
- bool big_stub = this->dynsym_count_ > 0x10000;
- unsigned char* pov = oview;
- for (typename Mips_stubs_entry_set::const_iterator
- p = this->symbols_.begin(); p != this->symbols_.end(); ++p)
- {
- Mips_symbol<size>* sym = *p;
- const uint32_t* lazy_stub;
- bool n64 = this->target_->is_output_n64();
- if (!this->target_->is_output_micromips())
- {
- // Write standard (non-microMIPS) stub.
- if (!big_stub)
- {
- if (sym->dynsym_index() & ~0x7fff)
- // Dynsym index is between 32K and 64K.
- lazy_stub = n64 ? lazy_stub_normal_2_n64 : lazy_stub_normal_2;
- else
- // Dynsym index is less than 32K.
- lazy_stub = n64 ? lazy_stub_normal_1_n64 : lazy_stub_normal_1;
- }
- else
- lazy_stub = n64 ? lazy_stub_big_n64 : lazy_stub_big;
- unsigned int i = 0;
- elfcpp::Swap<32, big_endian>::writeval(pov, lazy_stub[i]);
- elfcpp::Swap<32, big_endian>::writeval(pov + 4, lazy_stub[i + 1]);
- pov += 8;
- i += 2;
- if (big_stub)
- {
- // LUI instruction of the big stub. Paste high 16 bits of the
- // dynsym index.
- elfcpp::Swap<32, big_endian>::writeval(pov,
- lazy_stub[i] | ((sym->dynsym_index() >> 16) & 0x7fff));
- pov += 4;
- i += 1;
- }
- elfcpp::Swap<32, big_endian>::writeval(pov, lazy_stub[i]);
- // Last stub instruction. Paste low 16 bits of the dynsym index.
- elfcpp::Swap<32, big_endian>::writeval(pov + 4,
- lazy_stub[i + 1] | (sym->dynsym_index() & 0xffff));
- pov += 8;
- }
- else if (this->target_->use_32bit_micromips_instructions())
- {
- // Write microMIPS stub in insn32 mode.
- if (!big_stub)
- {
- if (sym->dynsym_index() & ~0x7fff)
- // Dynsym index is between 32K and 64K.
- lazy_stub = n64 ? lazy_stub_micromips32_normal_2_n64
- : lazy_stub_micromips32_normal_2;
- else
- // Dynsym index is less than 32K.
- lazy_stub = n64 ? lazy_stub_micromips32_normal_1_n64
- : lazy_stub_micromips32_normal_1;
- }
- else
- lazy_stub = n64 ? lazy_stub_micromips32_big_n64
- : lazy_stub_micromips32_big;
- unsigned int i = 0;
- // First stub instruction. We emit 32-bit microMIPS instructions by
- // emitting two 16-bit parts because on microMIPS the 16-bit part of
- // the instruction where the opcode is must always come first, for
- // both little and big endian.
- elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]);
- // Second stub instruction.
- elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 6, lazy_stub[i + 3]);
- pov += 8;
- i += 4;
- if (big_stub)
- {
- // LUI instruction of the big stub. Paste high 16 bits of the
- // dynsym index.
- elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 2,
- (sym->dynsym_index() >> 16) & 0x7fff);
- pov += 4;
- i += 2;
- }
- elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]);
- // Last stub instruction. Paste low 16 bits of the dynsym index.
- elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 6,
- sym->dynsym_index() & 0xffff);
- pov += 8;
- }
- else
- {
- // Write microMIPS stub.
- if (!big_stub)
- {
- if (sym->dynsym_index() & ~0x7fff)
- // Dynsym index is between 32K and 64K.
- lazy_stub = n64 ? lazy_stub_micromips_normal_2_n64
- : lazy_stub_micromips_normal_2;
- else
- // Dynsym index is less than 32K.
- lazy_stub = n64 ? lazy_stub_micromips_normal_1_n64
- : lazy_stub_micromips_normal_1;
- }
- else
- lazy_stub = n64 ? lazy_stub_micromips_big_n64
- : lazy_stub_micromips_big;
- unsigned int i = 0;
- // First stub instruction. We emit 32-bit microMIPS instructions by
- // emitting two 16-bit parts because on microMIPS the 16-bit part of
- // the instruction where the opcode is must always come first, for
- // both little and big endian.
- elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]);
- // Second stub instruction.
- elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]);
- pov += 6;
- i += 3;
- if (big_stub)
- {
- // LUI instruction of the big stub. Paste high 16 bits of the
- // dynsym index.
- elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 2,
- (sym->dynsym_index() >> 16) & 0x7fff);
- pov += 4;
- i += 2;
- }
- elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
- // Last stub instruction. Paste low 16 bits of the dynsym index.
- elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]);
- elfcpp::Swap<16, big_endian>::writeval(pov + 4,
- sym->dynsym_index() & 0xffff);
- pov += 6;
- }
- }
- // We always allocate 20 bytes for every stub, because final dynsym count is
- // not known in method do_finalize_sections. There are 4 unused bytes per
- // stub if final dynsym count is less than 0x10000.
- unsigned int used = pov - oview;
- unsigned int unused = big_stub ? 0 : this->symbols_.size() * 4;
- gold_assert(static_cast<section_size_type>(used + unused) == oview_size);
- // Fill the unused space with zeroes.
- // TODO(sasa): Can we strip unused bytes during the relaxation?
- if (unused > 0)
- memset(pov, 0, unused);
- of->write_output_view(offset, oview_size, oview);
- }
- // Mips_output_section_reginfo methods.
- template<int size, bool big_endian>
- void
- Mips_output_section_reginfo<size, big_endian>::do_write(Output_file* of)
- {
- off_t offset = this->offset();
- off_t data_size = this->data_size();
- unsigned char* view = of->get_output_view(offset, data_size);
- elfcpp::Swap<size, big_endian>::writeval(view, this->gprmask_);
- elfcpp::Swap<size, big_endian>::writeval(view + 4, this->cprmask1_);
- elfcpp::Swap<size, big_endian>::writeval(view + 8, this->cprmask2_);
- elfcpp::Swap<size, big_endian>::writeval(view + 12, this->cprmask3_);
- elfcpp::Swap<size, big_endian>::writeval(view + 16, this->cprmask4_);
- // Write the gp value.
- elfcpp::Swap<size, big_endian>::writeval(view + 20,
- this->target_->gp_value());
- of->write_output_view(offset, data_size, view);
- }
- // Mips_output_section_options methods.
- template<int size, bool big_endian>
- void
- Mips_output_section_options<size, big_endian>::do_write(Output_file* of)
- {
- off_t offset = this->offset();
- const section_size_type oview_size =
- convert_to_section_size_type(this->data_size());
- unsigned char* view = of->get_output_view(offset, oview_size);
- const unsigned char* end = view + oview_size;
- while (view + 8 <= end)
- {
- unsigned char kind = elfcpp::Swap<8, big_endian>::readval(view);
- unsigned char sz = elfcpp::Swap<8, big_endian>::readval(view + 1);
- if (sz < 8)
- {
- gold_error(_("Warning: bad `%s' option size %u smaller "
- "than its header in output section"),
- this->name(), sz);
- break;
- }
- // Only update ri_gp_value (GP register value) field of ODK_REGINFO entry.
- if (this->target_->is_output_n64() && kind == elfcpp::ODK_REGINFO)
- elfcpp::Swap<size, big_endian>::writeval(view + 32,
- this->target_->gp_value());
- else if (kind == elfcpp::ODK_REGINFO)
- elfcpp::Swap<size, big_endian>::writeval(view + 28,
- this->target_->gp_value());
- view += sz;
- }
- of->write_output_view(offset, oview_size, view);
- }
- // Mips_output_section_abiflags methods.
- template<int size, bool big_endian>
- void
- Mips_output_section_abiflags<size, big_endian>::do_write(Output_file* of)
- {
- off_t offset = this->offset();
- off_t data_size = this->data_size();
- unsigned char* view = of->get_output_view(offset, data_size);
- elfcpp::Swap<16, big_endian>::writeval(view, this->abiflags_.version);
- elfcpp::Swap<8, big_endian>::writeval(view + 2, this->abiflags_.isa_level);
- elfcpp::Swap<8, big_endian>::writeval(view + 3, this->abiflags_.isa_rev);
- elfcpp::Swap<8, big_endian>::writeval(view + 4, this->abiflags_.gpr_size);
- elfcpp::Swap<8, big_endian>::writeval(view + 5, this->abiflags_.cpr1_size);
- elfcpp::Swap<8, big_endian>::writeval(view + 6, this->abiflags_.cpr2_size);
- elfcpp::Swap<8, big_endian>::writeval(view + 7, this->abiflags_.fp_abi);
- elfcpp::Swap<32, big_endian>::writeval(view + 8, this->abiflags_.isa_ext);
- elfcpp::Swap<32, big_endian>::writeval(view + 12, this->abiflags_.ases);
- elfcpp::Swap<32, big_endian>::writeval(view + 16, this->abiflags_.flags1);
- elfcpp::Swap<32, big_endian>::writeval(view + 20, this->abiflags_.flags2);
- of->write_output_view(offset, data_size, view);
- }
- // Mips_copy_relocs methods.
- // Emit any saved relocs.
- template<int sh_type, int size, bool big_endian>
- void
- Mips_copy_relocs<sh_type, size, big_endian>::emit_mips(
- Output_data_reloc<sh_type, true, size, big_endian>* reloc_section,
- Symbol_table* symtab, Layout* layout, Target_mips<size, big_endian>* target)
- {
- for (typename Copy_relocs<sh_type, size, big_endian>::
- Copy_reloc_entries::iterator p = this->entries_.begin();
- p != this->entries_.end();
- ++p)
- emit_entry(*p, reloc_section, symtab, layout, target);
- // We no longer need the saved information.
- this->entries_.clear();
- }
- // Emit the reloc if appropriate.
- template<int sh_type, int size, bool big_endian>
- void
- Mips_copy_relocs<sh_type, size, big_endian>::emit_entry(
- Copy_reloc_entry& entry,
- Output_data_reloc<sh_type, true, size, big_endian>* reloc_section,
- Symbol_table* symtab, Layout* layout, Target_mips<size, big_endian>* target)
- {
- // If the symbol is no longer defined in a dynamic object, then we
- // emitted a COPY relocation, and we do not want to emit this
- // dynamic relocation.
- if (!entry.sym_->is_from_dynobj())
- return;
- bool can_make_dynamic = (entry.reloc_type_ == elfcpp::R_MIPS_32
- || entry.reloc_type_ == elfcpp::R_MIPS_REL32
- || entry.reloc_type_ == elfcpp::R_MIPS_64);
- Mips_symbol<size>* sym = Mips_symbol<size>::as_mips_sym(entry.sym_);
- if (can_make_dynamic && !sym->has_static_relocs())
- {
- Mips_relobj<size, big_endian>* object =
- Mips_relobj<size, big_endian>::as_mips_relobj(entry.relobj_);
- target->got_section(symtab, layout)->record_global_got_symbol(
- sym, object, entry.reloc_type_, true, false);
- if (!symbol_references_local(sym, sym->should_add_dynsym_entry(symtab)))
- target->rel_dyn_section(layout)->add_global(sym, elfcpp::R_MIPS_REL32,
- entry.output_section_, entry.relobj_, entry.shndx_, entry.address_);
- else
- target->rel_dyn_section(layout)->add_symbolless_global_addend(
- sym, elfcpp::R_MIPS_REL32, entry.output_section_, entry.relobj_,
- entry.shndx_, entry.address_);
- }
- else
- this->make_copy_reloc(symtab, layout,
- static_cast<Sized_symbol<size>*>(entry.sym_),
- entry.relobj_,
- reloc_section);
- }
- // Target_mips methods.
- // Return the value to use for a dynamic symbol which requires special
- // treatment. This is how we support equality comparisons of function
- // pointers across shared library boundaries, as described in the
- // processor specific ABI supplement.
- template<int size, bool big_endian>
- uint64_t
- Target_mips<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
- {
- uint64_t value = 0;
- const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym);
- if (!mips_sym->has_lazy_stub())
- {
- if (mips_sym->has_plt_offset())
- {
- // We distinguish between PLT entries and lazy-binding stubs by
- // giving the former an st_other value of STO_MIPS_PLT. Set the
- // value to the stub address if there are any relocations in the
- // binary where pointer equality matters.
- if (mips_sym->pointer_equality_needed())
- {
- // Prefer a standard MIPS PLT entry.
- if (mips_sym->has_mips_plt_offset())
- value = this->plt_section()->mips_entry_address(mips_sym);
- else
- value = this->plt_section()->comp_entry_address(mips_sym) + 1;
- }
- else
- value = 0;
- }
- }
- else
- {
- // First, set stub offsets for symbols. This method expects that the
- // number of entries in dynamic symbol table is set.
- this->mips_stubs_section()->set_lazy_stub_offsets();
- // The run-time linker uses the st_value field of the symbol
- // to reset the global offset table entry for this external
- // to its stub address when unlinking a shared object.
- value = this->mips_stubs_section()->stub_address(mips_sym);
- }
- if (mips_sym->has_mips16_fn_stub())
- {
- // If we have a MIPS16 function with a stub, the dynamic symbol must
- // refer to the stub, since only the stub uses the standard calling
- // conventions.
- value = mips_sym->template
- get_mips16_fn_stub<big_endian>()->output_address();
- }
- return value;
- }
- // Get the dynamic reloc section, creating it if necessary. It's always
- // .rel.dyn, even for MIPS64.
- template<int size, bool big_endian>
- typename Target_mips<size, big_endian>::Reloc_section*
- Target_mips<size, big_endian>::rel_dyn_section(Layout* layout)
- {
- if (this->rel_dyn_ == NULL)
- {
- gold_assert(layout != NULL);
- this->rel_dyn_ = new Reloc_section(parameters->options().combreloc());
- layout->add_output_section_data(".rel.dyn", elfcpp::SHT_REL,
- elfcpp::SHF_ALLOC, this->rel_dyn_,
- ORDER_DYNAMIC_RELOCS, false);
- // First entry in .rel.dyn has to be null.
- // This is hack - we define dummy output data and set its address to 0,
- // and define absolute R_MIPS_NONE relocation with offset 0 against it.
- // This ensures that the entry is null.
- Output_data* od = new Output_data_zero_fill(0, 0);
- od->set_address(0);
- this->rel_dyn_->add_absolute(elfcpp::R_MIPS_NONE, od, 0);
- }
- return this->rel_dyn_;
- }
- // Get the GOT section, creating it if necessary.
- template<int size, bool big_endian>
- Mips_output_data_got<size, big_endian>*
- Target_mips<size, big_endian>::got_section(Symbol_table* symtab,
- Layout* layout)
- {
- if (this->got_ == NULL)
- {
- gold_assert(symtab != NULL && layout != NULL);
- this->got_ = new Mips_output_data_got<size, big_endian>(this, symtab,
- layout);
- layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
- (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE |
- elfcpp::SHF_MIPS_GPREL),
- this->got_, ORDER_DATA, false);
- // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
- symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
- Symbol_table::PREDEFINED,
- this->got_,
- 0, 0, elfcpp::STT_OBJECT,
- elfcpp::STB_GLOBAL,
- elfcpp::STV_HIDDEN, 0,
- false, false);
- }
- return this->got_;
- }
- // Calculate value of _gp symbol.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::set_gp(Layout* layout, Symbol_table* symtab)
- {
- gold_assert(this->gp_ == NULL);
- Sized_symbol<size>* gp =
- static_cast<Sized_symbol<size>*>(symtab->lookup("_gp"));
- // Set _gp symbol if the linker script hasn't created it.
- if (gp == NULL || gp->source() != Symbol::IS_CONSTANT)
- {
- // If there is no .got section, gp should be based on .sdata.
- Output_data* gp_section = (this->got_ != NULL
- ? this->got_->output_section()
- : layout->find_output_section(".sdata"));
- if (gp_section != NULL)
- gp = static_cast<Sized_symbol<size>*>(symtab->define_in_output_data(
- "_gp", NULL, Symbol_table::PREDEFINED,
- gp_section, MIPS_GP_OFFSET, 0,
- elfcpp::STT_NOTYPE,
- elfcpp::STB_LOCAL,
- elfcpp::STV_DEFAULT,
- 0, false, false));
- }
- this->gp_ = gp;
- }
- // Set the dynamic symbol indexes. INDEX is the index of the first
- // global dynamic symbol. Pointers to the symbols are stored into the
- // vector SYMS. The names are added to DYNPOOL. This returns an
- // updated dynamic symbol index.
- template<int size, bool big_endian>
- unsigned int
- Target_mips<size, big_endian>::do_set_dynsym_indexes(
- std::vector<Symbol*>* dyn_symbols, unsigned int index,
- std::vector<Symbol*>* syms, Stringpool* dynpool,
- Versions* versions, Symbol_table* symtab) const
- {
- std::vector<Symbol*> non_got_symbols;
- std::vector<Symbol*> got_symbols;
- reorder_dyn_symbols<size, big_endian>(dyn_symbols, &non_got_symbols,
- &got_symbols);
- for (std::vector<Symbol*>::iterator p = non_got_symbols.begin();
- p != non_got_symbols.end();
- ++p)
- {
- Symbol* sym = *p;
- // Note that SYM may already have a dynamic symbol index, since
- // some symbols appear more than once in the symbol table, with
- // and without a version.
- if (!sym->has_dynsym_index())
- {
- sym->set_dynsym_index(index);
- ++index;
- syms->push_back(sym);
- dynpool->add(sym->name(), false, NULL);
- // Record any version information.
- if (sym->version() != NULL)
- versions->record_version(symtab, dynpool, sym);
- // If the symbol is defined in a dynamic object and is
- // referenced in a regular object, then mark the dynamic
- // object as needed. This is used to implement --as-needed.
- if (sym->is_from_dynobj() && sym->in_reg())
- sym->object()->set_is_needed();
- }
- }
- for (std::vector<Symbol*>::iterator p = got_symbols.begin();
- p != got_symbols.end();
- ++p)
- {
- Symbol* sym = *p;
- if (!sym->has_dynsym_index())
- {
- // Record any version information.
- if (sym->version() != NULL)
- versions->record_version(symtab, dynpool, sym);
- }
- }
- index = versions->finalize(symtab, index, syms);
- int got_sym_count = 0;
- for (std::vector<Symbol*>::iterator p = got_symbols.begin();
- p != got_symbols.end();
- ++p)
- {
- Symbol* sym = *p;
- if (!sym->has_dynsym_index())
- {
- ++got_sym_count;
- sym->set_dynsym_index(index);
- ++index;
- syms->push_back(sym);
- dynpool->add(sym->name(), false, NULL);
- // If the symbol is defined in a dynamic object and is
- // referenced in a regular object, then mark the dynamic
- // object as needed. This is used to implement --as-needed.
- if (sym->is_from_dynobj() && sym->in_reg())
- sym->object()->set_is_needed();
- }
- }
- // Set index of the first symbol that has .got entry.
- this->got_->set_first_global_got_dynsym_index(
- got_sym_count > 0 ? index - got_sym_count : -1U);
- if (this->mips_stubs_ != NULL)
- this->mips_stubs_->set_dynsym_count(index);
- return index;
- }
- // Create a PLT entry for a global symbol referenced by r_type relocation.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::make_plt_entry(Symbol_table* symtab,
- Layout* layout,
- Mips_symbol<size>* gsym,
- unsigned int r_type)
- {
- if (gsym->has_lazy_stub() || gsym->has_plt_offset())
- return;
- if (this->plt_ == NULL)
- {
- // Create the GOT section first.
- this->got_section(symtab, layout);
- this->got_plt_ = new Output_data_space(4, "** GOT PLT");
- layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS,
- (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE),
- this->got_plt_, ORDER_DATA, false);
- // The first two entries are reserved.
- this->got_plt_->set_current_data_size(2 * size/8);
- this->plt_ = new Mips_output_data_plt<size, big_endian>(layout,
- this->got_plt_,
- this);
- layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
- (elfcpp::SHF_ALLOC
- | elfcpp::SHF_EXECINSTR),
- this->plt_, ORDER_PLT, false);
- // Make the sh_info field of .rel.plt point to .plt.
- Output_section* rel_plt_os = this->plt_->rel_plt()->output_section();
- rel_plt_os->set_info_section(this->plt_->output_section());
- }
- this->plt_->add_entry(gsym, r_type);
- }
- // Get the .MIPS.stubs section, creating it if necessary.
- template<int size, bool big_endian>
- Mips_output_data_mips_stubs<size, big_endian>*
- Target_mips<size, big_endian>::mips_stubs_section(Layout* layout)
- {
- if (this->mips_stubs_ == NULL)
- {
- this->mips_stubs_ =
- new Mips_output_data_mips_stubs<size, big_endian>(this);
- layout->add_output_section_data(".MIPS.stubs", elfcpp::SHT_PROGBITS,
- (elfcpp::SHF_ALLOC
- | elfcpp::SHF_EXECINSTR),
- this->mips_stubs_, ORDER_PLT, false);
- }
- return this->mips_stubs_;
- }
- // Get the LA25 stub section, creating it if necessary.
- template<int size, bool big_endian>
- Mips_output_data_la25_stub<size, big_endian>*
- Target_mips<size, big_endian>::la25_stub_section(Layout* layout)
- {
- if (this->la25_stub_ == NULL)
- {
- this->la25_stub_ = new Mips_output_data_la25_stub<size, big_endian>();
- layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
- (elfcpp::SHF_ALLOC
- | elfcpp::SHF_EXECINSTR),
- this->la25_stub_, ORDER_TEXT, false);
- }
- return this->la25_stub_;
- }
- // Process the relocations to determine unreferenced sections for
- // garbage collection.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::gc_process_relocs(
- Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- size_t local_symbol_count,
- const unsigned char* plocal_symbols)
- {
- typedef Target_mips<size, big_endian> Mips;
- if (sh_type == elfcpp::SHT_REL)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>
- Classify_reloc;
- gold::gc_process_relocs<size, big_endian, Mips, Scan, Classify_reloc>(
- symtab,
- layout,
- this,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_symbols);
- }
- else if (sh_type == elfcpp::SHT_RELA)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- gold::gc_process_relocs<size, big_endian, Mips, Scan, Classify_reloc>(
- symtab,
- layout,
- this,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_symbols);
- }
- else
- gold_unreachable();
- }
- // Scan relocations for a section.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::scan_relocs(
- Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- size_t local_symbol_count,
- const unsigned char* plocal_symbols)
- {
- typedef Target_mips<size, big_endian> Mips;
- if (sh_type == elfcpp::SHT_REL)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>
- Classify_reloc;
- gold::scan_relocs<size, big_endian, Mips, Scan, Classify_reloc>(
- symtab,
- layout,
- this,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_symbols);
- }
- else if (sh_type == elfcpp::SHT_RELA)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- gold::scan_relocs<size, big_endian, Mips, Scan, Classify_reloc>(
- symtab,
- layout,
- this,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_symbols);
- }
- }
- template<int size, bool big_endian>
- bool
- Target_mips<size, big_endian>::mips_32bit_flags(elfcpp::Elf_Word flags)
- {
- return ((flags & elfcpp::EF_MIPS_32BITMODE) != 0
- || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_O32
- || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_EABI32
- || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_1
- || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_2
- || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32
- || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32R2
- || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32R6);
- }
- // Return the MACH for a MIPS e_flags value.
- template<int size, bool big_endian>
- unsigned int
- Target_mips<size, big_endian>::elf_mips_mach(elfcpp::Elf_Word flags)
- {
- switch (flags & elfcpp::EF_MIPS_MACH)
- {
- case elfcpp::E_MIPS_MACH_3900:
- return mach_mips3900;
- case elfcpp::E_MIPS_MACH_4010:
- return mach_mips4010;
- case elfcpp::E_MIPS_MACH_4100:
- return mach_mips4100;
- case elfcpp::E_MIPS_MACH_4111:
- return mach_mips4111;
- case elfcpp::E_MIPS_MACH_4120:
- return mach_mips4120;
- case elfcpp::E_MIPS_MACH_4650:
- return mach_mips4650;
- case elfcpp::E_MIPS_MACH_5400:
- return mach_mips5400;
- case elfcpp::E_MIPS_MACH_5500:
- return mach_mips5500;
- case elfcpp::E_MIPS_MACH_5900:
- return mach_mips5900;
- case elfcpp::E_MIPS_MACH_9000:
- return mach_mips9000;
- case elfcpp::E_MIPS_MACH_SB1:
- return mach_mips_sb1;
- case elfcpp::E_MIPS_MACH_LS2E:
- return mach_mips_loongson_2e;
- case elfcpp::E_MIPS_MACH_LS2F:
- return mach_mips_loongson_2f;
- case elfcpp::E_MIPS_MACH_GS464:
- return mach_mips_gs464;
- case elfcpp::E_MIPS_MACH_GS464E:
- return mach_mips_gs464e;
- case elfcpp::E_MIPS_MACH_GS264E:
- return mach_mips_gs264e;
- case elfcpp::E_MIPS_MACH_OCTEON3:
- return mach_mips_octeon3;
- case elfcpp::E_MIPS_MACH_OCTEON2:
- return mach_mips_octeon2;
- case elfcpp::E_MIPS_MACH_OCTEON:
- return mach_mips_octeon;
- case elfcpp::E_MIPS_MACH_XLR:
- return mach_mips_xlr;
- default:
- switch (flags & elfcpp::EF_MIPS_ARCH)
- {
- default:
- case elfcpp::E_MIPS_ARCH_1:
- return mach_mips3000;
- case elfcpp::E_MIPS_ARCH_2:
- return mach_mips6000;
- case elfcpp::E_MIPS_ARCH_3:
- return mach_mips4000;
- case elfcpp::E_MIPS_ARCH_4:
- return mach_mips8000;
- case elfcpp::E_MIPS_ARCH_5:
- return mach_mips5;
- case elfcpp::E_MIPS_ARCH_32:
- return mach_mipsisa32;
- case elfcpp::E_MIPS_ARCH_64:
- return mach_mipsisa64;
- case elfcpp::E_MIPS_ARCH_32R2:
- return mach_mipsisa32r2;
- case elfcpp::E_MIPS_ARCH_32R6:
- return mach_mipsisa32r6;
- case elfcpp::E_MIPS_ARCH_64R2:
- return mach_mipsisa64r2;
- case elfcpp::E_MIPS_ARCH_64R6:
- return mach_mipsisa64r6;
- }
- }
- return 0;
- }
- // Return the MACH for each .MIPS.abiflags ISA Extension.
- template<int size, bool big_endian>
- unsigned int
- Target_mips<size, big_endian>::mips_isa_ext_mach(unsigned int isa_ext)
- {
- switch (isa_ext)
- {
- case elfcpp::AFL_EXT_3900:
- return mach_mips3900;
- case elfcpp::AFL_EXT_4010:
- return mach_mips4010;
- case elfcpp::AFL_EXT_4100:
- return mach_mips4100;
- case elfcpp::AFL_EXT_4111:
- return mach_mips4111;
- case elfcpp::AFL_EXT_4120:
- return mach_mips4120;
- case elfcpp::AFL_EXT_4650:
- return mach_mips4650;
- case elfcpp::AFL_EXT_5400:
- return mach_mips5400;
- case elfcpp::AFL_EXT_5500:
- return mach_mips5500;
- case elfcpp::AFL_EXT_5900:
- return mach_mips5900;
- case elfcpp::AFL_EXT_10000:
- return mach_mips10000;
- case elfcpp::AFL_EXT_LOONGSON_2E:
- return mach_mips_loongson_2e;
- case elfcpp::AFL_EXT_LOONGSON_2F:
- return mach_mips_loongson_2f;
- case elfcpp::AFL_EXT_SB1:
- return mach_mips_sb1;
- case elfcpp::AFL_EXT_OCTEON:
- return mach_mips_octeon;
- case elfcpp::AFL_EXT_OCTEONP:
- return mach_mips_octeonp;
- case elfcpp::AFL_EXT_OCTEON2:
- return mach_mips_octeon2;
- case elfcpp::AFL_EXT_XLR:
- return mach_mips_xlr;
- default:
- return mach_mips3000;
- }
- }
- // Return the .MIPS.abiflags value representing each ISA Extension.
- template<int size, bool big_endian>
- unsigned int
- Target_mips<size, big_endian>::mips_isa_ext(unsigned int mips_mach)
- {
- switch (mips_mach)
- {
- case mach_mips3900:
- return elfcpp::AFL_EXT_3900;
- case mach_mips4010:
- return elfcpp::AFL_EXT_4010;
- case mach_mips4100:
- return elfcpp::AFL_EXT_4100;
- case mach_mips4111:
- return elfcpp::AFL_EXT_4111;
- case mach_mips4120:
- return elfcpp::AFL_EXT_4120;
- case mach_mips4650:
- return elfcpp::AFL_EXT_4650;
- case mach_mips5400:
- return elfcpp::AFL_EXT_5400;
- case mach_mips5500:
- return elfcpp::AFL_EXT_5500;
- case mach_mips5900:
- return elfcpp::AFL_EXT_5900;
- case mach_mips10000:
- return elfcpp::AFL_EXT_10000;
- case mach_mips_loongson_2e:
- return elfcpp::AFL_EXT_LOONGSON_2E;
- case mach_mips_loongson_2f:
- return elfcpp::AFL_EXT_LOONGSON_2F;
- case mach_mips_sb1:
- return elfcpp::AFL_EXT_SB1;
- case mach_mips_octeon:
- return elfcpp::AFL_EXT_OCTEON;
- case mach_mips_octeonp:
- return elfcpp::AFL_EXT_OCTEONP;
- case mach_mips_octeon3:
- return elfcpp::AFL_EXT_OCTEON3;
- case mach_mips_octeon2:
- return elfcpp::AFL_EXT_OCTEON2;
- case mach_mips_xlr:
- return elfcpp::AFL_EXT_XLR;
- default:
- return 0;
- }
- }
- // Update the isa_level, isa_rev, isa_ext fields of abiflags.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::update_abiflags_isa(const std::string& name,
- elfcpp::Elf_Word e_flags, Mips_abiflags<big_endian>* abiflags)
- {
- int new_isa = 0;
- switch (e_flags & elfcpp::EF_MIPS_ARCH)
- {
- case elfcpp::E_MIPS_ARCH_1:
- new_isa = this->level_rev(1, 0);
- break;
- case elfcpp::E_MIPS_ARCH_2:
- new_isa = this->level_rev(2, 0);
- break;
- case elfcpp::E_MIPS_ARCH_3:
- new_isa = this->level_rev(3, 0);
- break;
- case elfcpp::E_MIPS_ARCH_4:
- new_isa = this->level_rev(4, 0);
- break;
- case elfcpp::E_MIPS_ARCH_5:
- new_isa = this->level_rev(5, 0);
- break;
- case elfcpp::E_MIPS_ARCH_32:
- new_isa = this->level_rev(32, 1);
- break;
- case elfcpp::E_MIPS_ARCH_32R2:
- new_isa = this->level_rev(32, 2);
- break;
- case elfcpp::E_MIPS_ARCH_32R6:
- new_isa = this->level_rev(32, 6);
- break;
- case elfcpp::E_MIPS_ARCH_64:
- new_isa = this->level_rev(64, 1);
- break;
- case elfcpp::E_MIPS_ARCH_64R2:
- new_isa = this->level_rev(64, 2);
- break;
- case elfcpp::E_MIPS_ARCH_64R6:
- new_isa = this->level_rev(64, 6);
- break;
- default:
- gold_error(_("%s: Unknown architecture %s"), name.c_str(),
- this->elf_mips_mach_name(e_flags));
- }
- if (new_isa > this->level_rev(abiflags->isa_level, abiflags->isa_rev))
- {
- // Decode a single value into level and revision.
- abiflags->isa_level = new_isa >> 3;
- abiflags->isa_rev = new_isa & 0x7;
- }
- // Update the isa_ext if needed.
- if (this->mips_mach_extends(this->mips_isa_ext_mach(abiflags->isa_ext),
- this->elf_mips_mach(e_flags)))
- abiflags->isa_ext = this->mips_isa_ext(this->elf_mips_mach(e_flags));
- }
- // Infer the content of the ABI flags based on the elf header.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::infer_abiflags(
- Mips_relobj<size, big_endian>* relobj, Mips_abiflags<big_endian>* abiflags)
- {
- const Attributes_section_data* pasd = relobj->attributes_section_data();
- int attr_fp_abi = elfcpp::Val_GNU_MIPS_ABI_FP_ANY;
- elfcpp::Elf_Word e_flags = relobj->processor_specific_flags();
- this->update_abiflags_isa(relobj->name(), e_flags, abiflags);
- if (pasd != NULL)
- {
- // Read fp_abi from the .gnu.attribute section.
- const Object_attribute* attr =
- pasd->known_attributes(Object_attribute::OBJ_ATTR_GNU);
- attr_fp_abi = attr[elfcpp::Tag_GNU_MIPS_ABI_FP].int_value();
- }
- abiflags->fp_abi = attr_fp_abi;
- abiflags->cpr1_size = elfcpp::AFL_REG_NONE;
- abiflags->cpr2_size = elfcpp::AFL_REG_NONE;
- abiflags->gpr_size = this->mips_32bit_flags(e_flags) ? elfcpp::AFL_REG_32
- : elfcpp::AFL_REG_64;
- if (abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_SINGLE
- || abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_XX
- || (abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
- && abiflags->gpr_size == elfcpp::AFL_REG_32))
- abiflags->cpr1_size = elfcpp::AFL_REG_32;
- else if (abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
- || abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_64
- || abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_64A)
- abiflags->cpr1_size = elfcpp::AFL_REG_64;
- if (e_flags & elfcpp::EF_MIPS_ARCH_ASE_MDMX)
- abiflags->ases |= elfcpp::AFL_ASE_MDMX;
- if (e_flags & elfcpp::EF_MIPS_ARCH_ASE_M16)
- abiflags->ases |= elfcpp::AFL_ASE_MIPS16;
- if (e_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS)
- abiflags->ases |= elfcpp::AFL_ASE_MICROMIPS;
- if (abiflags->fp_abi != elfcpp::Val_GNU_MIPS_ABI_FP_ANY
- && abiflags->fp_abi != elfcpp::Val_GNU_MIPS_ABI_FP_SOFT
- && abiflags->fp_abi != elfcpp::Val_GNU_MIPS_ABI_FP_64A
- && abiflags->isa_level >= 32
- && abiflags->ases != elfcpp::AFL_ASE_LOONGSON_EXT)
- abiflags->flags1 |= elfcpp::AFL_FLAGS1_ODDSPREG;
- }
- // Create abiflags from elf header or from .MIPS.abiflags section.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::create_abiflags(
- Mips_relobj<size, big_endian>* relobj,
- Mips_abiflags<big_endian>* abiflags)
- {
- Mips_abiflags<big_endian>* sec_abiflags = relobj->abiflags();
- Mips_abiflags<big_endian> header_abiflags;
- this->infer_abiflags(relobj, &header_abiflags);
- if (sec_abiflags == NULL)
- {
- // If there is no input .MIPS.abiflags section, use abiflags created
- // from elf header.
- *abiflags = header_abiflags;
- return;
- }
- this->has_abiflags_section_ = true;
- // It is not possible to infer the correct ISA revision for R3 or R5
- // so drop down to R2 for the checks.
- unsigned char isa_rev = sec_abiflags->isa_rev;
- if (isa_rev == 3 || isa_rev == 5)
- isa_rev = 2;
- // Check compatibility between abiflags created from elf header
- // and abiflags from .MIPS.abiflags section in this object file.
- if (this->level_rev(sec_abiflags->isa_level, isa_rev)
- < this->level_rev(header_abiflags.isa_level, header_abiflags.isa_rev))
- gold_warning(_("%s: Inconsistent ISA between e_flags and .MIPS.abiflags"),
- relobj->name().c_str());
- if (header_abiflags.fp_abi != elfcpp::Val_GNU_MIPS_ABI_FP_ANY
- && sec_abiflags->fp_abi != header_abiflags.fp_abi)
- gold_warning(_("%s: Inconsistent FP ABI between .gnu.attributes and "
- ".MIPS.abiflags"), relobj->name().c_str());
- if ((sec_abiflags->ases & header_abiflags.ases) != header_abiflags.ases)
- gold_warning(_("%s: Inconsistent ASEs between e_flags and .MIPS.abiflags"),
- relobj->name().c_str());
- // The isa_ext is allowed to be an extension of what can be inferred
- // from e_flags.
- if (!this->mips_mach_extends(this->mips_isa_ext_mach(header_abiflags.isa_ext),
- this->mips_isa_ext_mach(sec_abiflags->isa_ext)))
- gold_warning(_("%s: Inconsistent ISA extensions between e_flags and "
- ".MIPS.abiflags"), relobj->name().c_str());
- if (sec_abiflags->flags2 != 0)
- gold_warning(_("%s: Unexpected flag in the flags2 field of "
- ".MIPS.abiflags (0x%x)"), relobj->name().c_str(),
- sec_abiflags->flags2);
- // Use abiflags from .MIPS.abiflags section.
- *abiflags = *sec_abiflags;
- }
- // Return the meaning of fp_abi, or "unknown" if not known.
- template<int size, bool big_endian>
- const char*
- Target_mips<size, big_endian>::fp_abi_string(int fp)
- {
- switch (fp)
- {
- case elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE:
- return "-mdouble-float";
- case elfcpp::Val_GNU_MIPS_ABI_FP_SINGLE:
- return "-msingle-float";
- case elfcpp::Val_GNU_MIPS_ABI_FP_SOFT:
- return "-msoft-float";
- case elfcpp::Val_GNU_MIPS_ABI_FP_OLD_64:
- return _("-mips32r2 -mfp64 (12 callee-saved)");
- case elfcpp::Val_GNU_MIPS_ABI_FP_XX:
- return "-mfpxx";
- case elfcpp::Val_GNU_MIPS_ABI_FP_64:
- return "-mgp32 -mfp64";
- case elfcpp::Val_GNU_MIPS_ABI_FP_64A:
- return "-mgp32 -mfp64 -mno-odd-spreg";
- default:
- return "unknown";
- }
- }
- // Select fp_abi.
- template<int size, bool big_endian>
- int
- Target_mips<size, big_endian>::select_fp_abi(const std::string& name, int in_fp,
- int out_fp)
- {
- if (in_fp == out_fp)
- return out_fp;
- if (out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_ANY)
- return in_fp;
- else if (out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_XX
- && (in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
- || in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64
- || in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64A))
- return in_fp;
- else if (in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_XX
- && (out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE
- || out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64
- || out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64A))
- return out_fp; // Keep the current setting.
- else if (out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64A
- && in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64)
- return in_fp;
- else if (in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64A
- && out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64)
- return out_fp; // Keep the current setting.
- else if (in_fp != elfcpp::Val_GNU_MIPS_ABI_FP_ANY)
- gold_warning(_("%s: FP ABI %s is incompatible with %s"), name.c_str(),
- fp_abi_string(in_fp), fp_abi_string(out_fp));
- return out_fp;
- }
- // Merge attributes from input object.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::merge_obj_attributes(const std::string& name,
- const Attributes_section_data* pasd)
- {
- // Return if there is no attributes section data.
- if (pasd == NULL)
- return;
- // If output has no object attributes, just copy.
- if (this->attributes_section_data_ == NULL)
- {
- this->attributes_section_data_ = new Attributes_section_data(*pasd);
- return;
- }
- Object_attribute* out_attr = this->attributes_section_data_->known_attributes(
- Object_attribute::OBJ_ATTR_GNU);
- out_attr[elfcpp::Tag_GNU_MIPS_ABI_FP].set_type(1);
- out_attr[elfcpp::Tag_GNU_MIPS_ABI_FP].set_int_value(this->abiflags_->fp_abi);
- // Merge Tag_compatibility attributes and any common GNU ones.
- this->attributes_section_data_->merge(name.c_str(), pasd);
- }
- // Merge abiflags from input object.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::merge_obj_abiflags(const std::string& name,
- Mips_abiflags<big_endian>* in_abiflags)
- {
- // If output has no abiflags, just copy.
- if (this->abiflags_ == NULL)
- {
- this->abiflags_ = new Mips_abiflags<big_endian>(*in_abiflags);
- return;
- }
- this->abiflags_->fp_abi = this->select_fp_abi(name, in_abiflags->fp_abi,
- this->abiflags_->fp_abi);
- // Merge abiflags.
- this->abiflags_->isa_level = std::max(this->abiflags_->isa_level,
- in_abiflags->isa_level);
- this->abiflags_->isa_rev = std::max(this->abiflags_->isa_rev,
- in_abiflags->isa_rev);
- this->abiflags_->gpr_size = std::max(this->abiflags_->gpr_size,
- in_abiflags->gpr_size);
- this->abiflags_->cpr1_size = std::max(this->abiflags_->cpr1_size,
- in_abiflags->cpr1_size);
- this->abiflags_->cpr2_size = std::max(this->abiflags_->cpr2_size,
- in_abiflags->cpr2_size);
- this->abiflags_->ases |= in_abiflags->ases;
- this->abiflags_->flags1 |= in_abiflags->flags1;
- }
- // Check whether machine EXTENSION is an extension of machine BASE.
- template<int size, bool big_endian>
- bool
- Target_mips<size, big_endian>::mips_mach_extends(unsigned int base,
- unsigned int extension)
- {
- if (extension == base)
- return true;
- if ((base == mach_mipsisa32)
- && this->mips_mach_extends(mach_mipsisa64, extension))
- return true;
- if ((base == mach_mipsisa32r2)
- && this->mips_mach_extends(mach_mipsisa64r2, extension))
- return true;
- for (unsigned int i = 0; i < this->mips_mach_extensions_.size(); ++i)
- if (extension == this->mips_mach_extensions_[i].first)
- {
- extension = this->mips_mach_extensions_[i].second;
- if (extension == base)
- return true;
- }
- return false;
- }
- // Merge file header flags from input object.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::merge_obj_e_flags(const std::string& name,
- elfcpp::Elf_Word in_flags)
- {
- // If flags are not set yet, just copy them.
- if (!this->are_processor_specific_flags_set())
- {
- this->set_processor_specific_flags(in_flags);
- this->mach_ = this->elf_mips_mach(in_flags);
- return;
- }
- elfcpp::Elf_Word new_flags = in_flags;
- elfcpp::Elf_Word old_flags = this->processor_specific_flags();
- elfcpp::Elf_Word merged_flags = this->processor_specific_flags();
- merged_flags |= new_flags & elfcpp::EF_MIPS_NOREORDER;
- // Check flag compatibility.
- new_flags &= ~elfcpp::EF_MIPS_NOREORDER;
- old_flags &= ~elfcpp::EF_MIPS_NOREORDER;
- // Some IRIX 6 BSD-compatibility objects have this bit set. It
- // doesn't seem to matter.
- new_flags &= ~elfcpp::EF_MIPS_XGOT;
- old_flags &= ~elfcpp::EF_MIPS_XGOT;
- // MIPSpro generates ucode info in n64 objects. Again, we should
- // just be able to ignore this.
- new_flags &= ~elfcpp::EF_MIPS_UCODE;
- old_flags &= ~elfcpp::EF_MIPS_UCODE;
- if (new_flags == old_flags)
- {
- this->set_processor_specific_flags(merged_flags);
- return;
- }
- if (((new_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0)
- != ((old_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0))
- gold_warning(_("%s: linking abicalls files with non-abicalls files"),
- name.c_str());
- if (new_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC))
- merged_flags |= elfcpp::EF_MIPS_CPIC;
- if (!(new_flags & elfcpp::EF_MIPS_PIC))
- merged_flags &= ~elfcpp::EF_MIPS_PIC;
- new_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC);
- old_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC);
- // Compare the ISAs.
- if (mips_32bit_flags(old_flags) != mips_32bit_flags(new_flags))
- gold_error(_("%s: linking 32-bit code with 64-bit code"), name.c_str());
- else if (!this->mips_mach_extends(this->elf_mips_mach(in_flags), this->mach_))
- {
- // Output ISA isn't the same as, or an extension of, input ISA.
- if (this->mips_mach_extends(this->mach_, this->elf_mips_mach(in_flags)))
- {
- // Copy the architecture info from input object to output. Also copy
- // the 32-bit flag (if set) so that we continue to recognise
- // output as a 32-bit binary.
- this->mach_ = this->elf_mips_mach(in_flags);
- merged_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH);
- merged_flags |= (new_flags & (elfcpp::EF_MIPS_ARCH
- | elfcpp::EF_MIPS_MACH | elfcpp::EF_MIPS_32BITMODE));
- // Update the ABI flags isa_level, isa_rev, isa_ext fields.
- this->update_abiflags_isa(name, merged_flags, this->abiflags_);
- // Copy across the ABI flags if output doesn't use them
- // and if that was what caused us to treat input object as 32-bit.
- if ((old_flags & elfcpp::EF_MIPS_ABI) == 0
- && this->mips_32bit_flags(new_flags)
- && !this->mips_32bit_flags(new_flags & ~elfcpp::EF_MIPS_ABI))
- merged_flags |= new_flags & elfcpp::EF_MIPS_ABI;
- }
- else
- // The ISAs aren't compatible.
- gold_error(_("%s: linking %s module with previous %s modules"),
- name.c_str(), this->elf_mips_mach_name(in_flags),
- this->elf_mips_mach_name(merged_flags));
- }
- new_flags &= (~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH
- | elfcpp::EF_MIPS_32BITMODE));
- old_flags &= (~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH
- | elfcpp::EF_MIPS_32BITMODE));
- // Compare ABIs.
- if ((new_flags & elfcpp::EF_MIPS_ABI) != (old_flags & elfcpp::EF_MIPS_ABI))
- {
- // Only error if both are set (to different values).
- if ((new_flags & elfcpp::EF_MIPS_ABI)
- && (old_flags & elfcpp::EF_MIPS_ABI))
- gold_error(_("%s: ABI mismatch: linking %s module with "
- "previous %s modules"), name.c_str(),
- this->elf_mips_abi_name(in_flags),
- this->elf_mips_abi_name(merged_flags));
- new_flags &= ~elfcpp::EF_MIPS_ABI;
- old_flags &= ~elfcpp::EF_MIPS_ABI;
- }
- // Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together
- // and allow arbitrary mixing of the remaining ASEs (retain the union).
- if ((new_flags & elfcpp::EF_MIPS_ARCH_ASE)
- != (old_flags & elfcpp::EF_MIPS_ARCH_ASE))
- {
- int old_micro = old_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS;
- int new_micro = new_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS;
- int old_m16 = old_flags & elfcpp::EF_MIPS_ARCH_ASE_M16;
- int new_m16 = new_flags & elfcpp::EF_MIPS_ARCH_ASE_M16;
- int micro_mis = old_m16 && new_micro;
- int m16_mis = old_micro && new_m16;
- if (m16_mis || micro_mis)
- gold_error(_("%s: ASE mismatch: linking %s module with "
- "previous %s modules"), name.c_str(),
- m16_mis ? "MIPS16" : "microMIPS",
- m16_mis ? "microMIPS" : "MIPS16");
- merged_flags |= new_flags & elfcpp::EF_MIPS_ARCH_ASE;
- new_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE;
- old_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE;
- }
- // Compare NaN encodings.
- if ((new_flags & elfcpp::EF_MIPS_NAN2008) != (old_flags & elfcpp::EF_MIPS_NAN2008))
- {
- gold_error(_("%s: linking %s module with previous %s modules"),
- name.c_str(),
- (new_flags & elfcpp::EF_MIPS_NAN2008
- ? "-mnan=2008" : "-mnan=legacy"),
- (old_flags & elfcpp::EF_MIPS_NAN2008
- ? "-mnan=2008" : "-mnan=legacy"));
- new_flags &= ~elfcpp::EF_MIPS_NAN2008;
- old_flags &= ~elfcpp::EF_MIPS_NAN2008;
- }
- // Compare FP64 state.
- if ((new_flags & elfcpp::EF_MIPS_FP64) != (old_flags & elfcpp::EF_MIPS_FP64))
- {
- gold_error(_("%s: linking %s module with previous %s modules"),
- name.c_str(),
- (new_flags & elfcpp::EF_MIPS_FP64
- ? "-mfp64" : "-mfp32"),
- (old_flags & elfcpp::EF_MIPS_FP64
- ? "-mfp64" : "-mfp32"));
- new_flags &= ~elfcpp::EF_MIPS_FP64;
- old_flags &= ~elfcpp::EF_MIPS_FP64;
- }
- // Warn about any other mismatches.
- if (new_flags != old_flags)
- gold_error(_("%s: uses different e_flags (0x%x) fields than previous "
- "modules (0x%x)"), name.c_str(), new_flags, old_flags);
- this->set_processor_specific_flags(merged_flags);
- }
- // Adjust ELF file header.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::do_adjust_elf_header(
- unsigned char* view,
- int len)
- {
- gold_assert(len == elfcpp::Elf_sizes<size>::ehdr_size);
- elfcpp::Ehdr<size, big_endian> ehdr(view);
- unsigned char e_ident[elfcpp::EI_NIDENT];
- elfcpp::Elf_Word flags = this->processor_specific_flags();
- memcpy(e_ident, ehdr.get_e_ident(), elfcpp::EI_NIDENT);
- unsigned char ei_abiversion = 0;
- elfcpp::Elf_Half type = ehdr.get_e_type();
- if (type == elfcpp::ET_EXEC
- && parameters->options().copyreloc()
- && (flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC))
- == elfcpp::EF_MIPS_CPIC)
- ei_abiversion = 1;
- if (this->abiflags_ != NULL
- && (this->abiflags_->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_64
- || this->abiflags_->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_64A))
- ei_abiversion = 3;
- e_ident[elfcpp::EI_ABIVERSION] = ei_abiversion;
- elfcpp::Ehdr_write<size, big_endian> oehdr(view);
- oehdr.put_e_ident(e_ident);
- if (this->entry_symbol_is_compressed_)
- oehdr.put_e_entry(ehdr.get_e_entry() + 1);
- }
- // do_make_elf_object to override the same function in the base class.
- // We need to use a target-specific sub-class of
- // Sized_relobj_file<size, big_endian> to store Mips specific information.
- // Hence we need to have our own ELF object creation.
- template<int size, bool big_endian>
- Object*
- Target_mips<size, big_endian>::do_make_elf_object(
- const std::string& name,
- Input_file* input_file,
- off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
- {
- int et = ehdr.get_e_type();
- // ET_EXEC files are valid input for --just-symbols/-R,
- // and we treat them as relocatable objects.
- if (et == elfcpp::ET_REL
- || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
- {
- Mips_relobj<size, big_endian>* obj =
- new Mips_relobj<size, big_endian>(name, input_file, offset, ehdr);
- obj->setup();
- return obj;
- }
- else if (et == elfcpp::ET_DYN)
- {
- // TODO(sasa): Should we create Mips_dynobj?
- return Target::do_make_elf_object(name, input_file, offset, ehdr);
- }
- else
- {
- gold_error(_("%s: unsupported ELF file type %d"),
- name.c_str(), et);
- return NULL;
- }
- }
- // Finalize the sections.
- template <int size, bool big_endian>
- void
- Target_mips<size, big_endian>::do_finalize_sections(Layout* layout,
- const Input_objects* input_objects,
- Symbol_table* symtab)
- {
- const bool relocatable = parameters->options().relocatable();
- // Add +1 to MIPS16 and microMIPS init_ and _fini symbols so that DT_INIT and
- // DT_FINI have correct values.
- Mips_symbol<size>* init = static_cast<Mips_symbol<size>*>(
- symtab->lookup(parameters->options().init()));
- if (init != NULL && (init->is_mips16() || init->is_micromips()))
- init->set_value(init->value() | 1);
- Mips_symbol<size>* fini = static_cast<Mips_symbol<size>*>(
- symtab->lookup(parameters->options().fini()));
- if (fini != NULL && (fini->is_mips16() || fini->is_micromips()))
- fini->set_value(fini->value() | 1);
- // Check whether the entry symbol is mips16 or micromips. This is needed to
- // adjust entry address in ELF header.
- Mips_symbol<size>* entry =
- static_cast<Mips_symbol<size>*>(symtab->lookup(this->entry_symbol_name()));
- this->entry_symbol_is_compressed_ = (entry != NULL && (entry->is_mips16()
- || entry->is_micromips()));
- if (!parameters->doing_static_link()
- && (strcmp(parameters->options().hash_style(), "gnu") == 0
- || strcmp(parameters->options().hash_style(), "both") == 0))
- {
- // .gnu.hash and the MIPS ABI require .dynsym to be sorted in different
- // ways. .gnu.hash needs symbols to be grouped by hash code whereas the
- // MIPS ABI requires a mapping between the GOT and the symbol table.
- gold_error(".gnu.hash is incompatible with the MIPS ABI");
- }
- // Check whether the final section that was scanned has HI16 or GOT16
- // relocations without the corresponding LO16 part.
- if (this->got16_addends_.size() > 0)
- gold_error("Can't find matching LO16 reloc");
- Valtype gprmask = 0;
- Valtype cprmask1 = 0;
- Valtype cprmask2 = 0;
- Valtype cprmask3 = 0;
- Valtype cprmask4 = 0;
- bool has_reginfo_section = false;
- for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
- p != input_objects->relobj_end();
- ++p)
- {
- Mips_relobj<size, big_endian>* relobj =
- Mips_relobj<size, big_endian>::as_mips_relobj(*p);
- // Check for any mips16 stub sections that we can discard.
- if (!relocatable)
- relobj->discard_mips16_stub_sections(symtab);
- if (!relobj->merge_processor_specific_data())
- continue;
- // Merge .reginfo contents of input objects.
- if (relobj->has_reginfo_section())
- {
- has_reginfo_section = true;
- gprmask |= relobj->gprmask();
- cprmask1 |= relobj->cprmask1();
- cprmask2 |= relobj->cprmask2();
- cprmask3 |= relobj->cprmask3();
- cprmask4 |= relobj->cprmask4();
- }
- // Merge processor specific flags.
- Mips_abiflags<big_endian> in_abiflags;
- this->create_abiflags(relobj, &in_abiflags);
- this->merge_obj_e_flags(relobj->name(),
- relobj->processor_specific_flags());
- this->merge_obj_abiflags(relobj->name(), &in_abiflags);
- this->merge_obj_attributes(relobj->name(),
- relobj->attributes_section_data());
- }
- // Create a .gnu.attributes section if we have merged any attributes
- // from inputs.
- if (this->attributes_section_data_ != NULL)
- {
- Output_attributes_section_data* attributes_section =
- new Output_attributes_section_data(*this->attributes_section_data_);
- layout->add_output_section_data(".gnu.attributes",
- elfcpp::SHT_GNU_ATTRIBUTES, 0,
- attributes_section, ORDER_INVALID, false);
- }
- // Create .MIPS.abiflags output section if there is an input section.
- if (this->has_abiflags_section_)
- {
- Mips_output_section_abiflags<size, big_endian>* abiflags_section =
- new Mips_output_section_abiflags<size, big_endian>(*this->abiflags_);
- Output_section* os =
- layout->add_output_section_data(".MIPS.abiflags",
- elfcpp::SHT_MIPS_ABIFLAGS,
- elfcpp::SHF_ALLOC,
- abiflags_section, ORDER_INVALID, false);
- if (!relocatable && os != NULL)
- {
- Output_segment* abiflags_segment =
- layout->make_output_segment(elfcpp::PT_MIPS_ABIFLAGS, elfcpp::PF_R);
- abiflags_segment->add_output_section_to_nonload(os, elfcpp::PF_R);
- }
- }
- if (has_reginfo_section && !parameters->options().gc_sections())
- {
- // Create .reginfo output section.
- Mips_output_section_reginfo<size, big_endian>* reginfo_section =
- new Mips_output_section_reginfo<size, big_endian>(this, gprmask,
- cprmask1, cprmask2,
- cprmask3, cprmask4);
- Output_section* os =
- layout->add_output_section_data(".reginfo", elfcpp::SHT_MIPS_REGINFO,
- elfcpp::SHF_ALLOC, reginfo_section,
- ORDER_INVALID, false);
- if (!relocatable && os != NULL)
- {
- Output_segment* reginfo_segment =
- layout->make_output_segment(elfcpp::PT_MIPS_REGINFO,
- elfcpp::PF_R);
- reginfo_segment->add_output_section_to_nonload(os, elfcpp::PF_R);
- }
- }
- if (this->plt_ != NULL)
- {
- // Set final PLT offsets for symbols.
- this->plt_section()->set_plt_offsets();
- // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
- // Set STO_MICROMIPS flag if the output has microMIPS code, but only if
- // there are no standard PLT entries present.
- unsigned char nonvis = 0;
- if (this->is_output_micromips()
- && !this->plt_section()->has_standard_entries())
- nonvis = elfcpp::STO_MICROMIPS >> 2;
- symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
- Symbol_table::PREDEFINED,
- this->plt_,
- 0, 0, elfcpp::STT_FUNC,
- elfcpp::STB_LOCAL,
- elfcpp::STV_DEFAULT, nonvis,
- false, false);
- }
- if (this->mips_stubs_ != NULL)
- {
- // Define _MIPS_STUBS_ at the start of the .MIPS.stubs section.
- unsigned char nonvis = 0;
- if (this->is_output_micromips())
- nonvis = elfcpp::STO_MICROMIPS >> 2;
- symtab->define_in_output_data("_MIPS_STUBS_", NULL,
- Symbol_table::PREDEFINED,
- this->mips_stubs_,
- 0, 0, elfcpp::STT_FUNC,
- elfcpp::STB_LOCAL,
- elfcpp::STV_DEFAULT, nonvis,
- false, false);
- }
- if (!relocatable && !parameters->doing_static_link())
- // In case there is no .got section, create one.
- this->got_section(symtab, layout);
- // Emit any relocs we saved in an attempt to avoid generating COPY
- // relocs.
- if (this->copy_relocs_.any_saved_relocs())
- this->copy_relocs_.emit_mips(this->rel_dyn_section(layout), symtab, layout,
- this);
- // Set _gp value.
- this->set_gp(layout, symtab);
- // Emit dynamic relocs.
- for (typename std::vector<Dyn_reloc>::iterator p = this->dyn_relocs_.begin();
- p != this->dyn_relocs_.end();
- ++p)
- p->emit(this->rel_dyn_section(layout), this->got_section(), symtab);
- if (this->has_got_section())
- this->got_section()->lay_out_got(layout, symtab, input_objects);
- if (this->mips_stubs_ != NULL)
- this->mips_stubs_->set_needs_dynsym_value();
- // Check for functions that might need $25 to be valid on entry.
- // TODO(sasa): Can we do this without iterating over all symbols?
- typedef Symbol_visitor_check_symbols<size, big_endian> Symbol_visitor;
- symtab->for_all_symbols<size, Symbol_visitor>(Symbol_visitor(this, layout,
- symtab));
- // Add NULL segment.
- if (!relocatable)
- layout->make_output_segment(elfcpp::PT_NULL, 0);
- // Fill in some more dynamic tags.
- // TODO(sasa): Add more dynamic tags.
- const Reloc_section* rel_plt = (this->plt_ == NULL
- ? NULL : this->plt_->rel_plt());
- layout->add_target_dynamic_tags(true, this->got_, rel_plt,
- this->rel_dyn_, true, false);
- Output_data_dynamic* const odyn = layout->dynamic_data();
- if (odyn != NULL
- && !relocatable
- && !parameters->doing_static_link())
- {
- unsigned int d_val;
- // This element holds a 32-bit version id for the Runtime
- // Linker Interface. This will start at integer value 1.
- d_val = 0x01;
- odyn->add_constant(elfcpp::DT_MIPS_RLD_VERSION, d_val);
- // Dynamic flags
- d_val = elfcpp::RHF_NOTPOT;
- odyn->add_constant(elfcpp::DT_MIPS_FLAGS, d_val);
- // Save layout for using when emitting custom dynamic tags.
- this->layout_ = layout;
- // This member holds the base address of the segment.
- odyn->add_custom(elfcpp::DT_MIPS_BASE_ADDRESS);
- // This member holds the number of entries in the .dynsym section.
- odyn->add_custom(elfcpp::DT_MIPS_SYMTABNO);
- // This member holds the index of the first dynamic symbol
- // table entry that corresponds to an entry in the global offset table.
- odyn->add_custom(elfcpp::DT_MIPS_GOTSYM);
- // This member holds the number of local GOT entries.
- odyn->add_constant(elfcpp::DT_MIPS_LOCAL_GOTNO,
- this->got_->get_local_gotno());
- if (this->plt_ != NULL)
- // DT_MIPS_PLTGOT dynamic tag
- odyn->add_section_address(elfcpp::DT_MIPS_PLTGOT, this->got_plt_);
- if (!parameters->options().shared())
- {
- this->rld_map_ = new Output_data_zero_fill(size / 8, size / 8);
- layout->add_output_section_data(".rld_map", elfcpp::SHT_PROGBITS,
- (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE),
- this->rld_map_, ORDER_INVALID, false);
- // __RLD_MAP will be filled in by the runtime loader to contain
- // a pointer to the _r_debug structure.
- Symbol* rld_map = symtab->define_in_output_data("__RLD_MAP", NULL,
- Symbol_table::PREDEFINED,
- this->rld_map_,
- 0, 0, elfcpp::STT_OBJECT,
- elfcpp::STB_GLOBAL,
- elfcpp::STV_DEFAULT, 0,
- false, false);
- if (!rld_map->is_forced_local())
- rld_map->set_needs_dynsym_entry();
- if (!parameters->options().pie())
- // This member holds the absolute address of the debug pointer.
- odyn->add_section_address(elfcpp::DT_MIPS_RLD_MAP, this->rld_map_);
- else
- // This member holds the offset to the debug pointer,
- // relative to the address of the tag.
- odyn->add_custom(elfcpp::DT_MIPS_RLD_MAP_REL);
- }
- }
- }
- // Get the custom dynamic tag value.
- template<int size, bool big_endian>
- unsigned int
- Target_mips<size, big_endian>::do_dynamic_tag_custom_value(elfcpp::DT tag) const
- {
- switch (tag)
- {
- case elfcpp::DT_MIPS_BASE_ADDRESS:
- {
- // The base address of the segment.
- // At this point, the segment list has been sorted into final order,
- // so just return vaddr of the first readable PT_LOAD segment.
- Output_segment* seg =
- this->layout_->find_output_segment(elfcpp::PT_LOAD, elfcpp::PF_R, 0);
- gold_assert(seg != NULL);
- return seg->vaddr();
- }
- case elfcpp::DT_MIPS_SYMTABNO:
- // The number of entries in the .dynsym section.
- return this->get_dt_mips_symtabno();
- case elfcpp::DT_MIPS_GOTSYM:
- {
- // The index of the first dynamic symbol table entry that corresponds
- // to an entry in the GOT.
- if (this->got_->first_global_got_dynsym_index() != -1U)
- return this->got_->first_global_got_dynsym_index();
- else
- // In case if we don't have global GOT symbols we default to setting
- // DT_MIPS_GOTSYM to the same value as DT_MIPS_SYMTABNO.
- return this->get_dt_mips_symtabno();
- }
- case elfcpp::DT_MIPS_RLD_MAP_REL:
- {
- // The MIPS_RLD_MAP_REL tag stores the offset to the debug pointer,
- // relative to the address of the tag.
- Output_data_dynamic* const odyn = this->layout_->dynamic_data();
- unsigned int entry_offset =
- odyn->get_entry_offset(elfcpp::DT_MIPS_RLD_MAP_REL);
- gold_assert(entry_offset != -1U);
- return this->rld_map_->address() - (odyn->address() + entry_offset);
- }
- default:
- gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag);
- }
- return (unsigned int)-1;
- }
- // Relocate section data.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::relocate_section(
- const Relocate_info<size, big_endian>* relinfo,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- unsigned char* view,
- Mips_address address,
- section_size_type view_size,
- const Reloc_symbol_changes* reloc_symbol_changes)
- {
- typedef Target_mips<size, big_endian> Mips;
- typedef typename Target_mips<size, big_endian>::Relocate Mips_relocate;
- if (sh_type == elfcpp::SHT_REL)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>
- Classify_reloc;
- gold::relocate_section<size, big_endian, Mips, Mips_relocate,
- gold::Default_comdat_behavior, Classify_reloc>(
- relinfo,
- this,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- view,
- address,
- view_size,
- reloc_symbol_changes);
- }
- else if (sh_type == elfcpp::SHT_RELA)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- gold::relocate_section<size, big_endian, Mips, Mips_relocate,
- gold::Default_comdat_behavior, Classify_reloc>(
- relinfo,
- this,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- view,
- address,
- view_size,
- reloc_symbol_changes);
- }
- }
- // Return the size of a relocation while scanning during a relocatable
- // link.
- unsigned int
- mips_get_size_for_reloc(unsigned int r_type, Relobj* object)
- {
- switch (r_type)
- {
- case elfcpp::R_MIPS_NONE:
- case elfcpp::R_MIPS_TLS_DTPMOD64:
- case elfcpp::R_MIPS_TLS_DTPREL64:
- case elfcpp::R_MIPS_TLS_TPREL64:
- return 0;
- case elfcpp::R_MIPS_32:
- case elfcpp::R_MIPS_TLS_DTPMOD32:
- case elfcpp::R_MIPS_TLS_DTPREL32:
- case elfcpp::R_MIPS_TLS_TPREL32:
- case elfcpp::R_MIPS_REL32:
- case elfcpp::R_MIPS_PC32:
- case elfcpp::R_MIPS_GPREL32:
- case elfcpp::R_MIPS_JALR:
- case elfcpp::R_MIPS_EH:
- return 4;
- case elfcpp::R_MIPS_16:
- case elfcpp::R_MIPS_HI16:
- case elfcpp::R_MIPS_LO16:
- case elfcpp::R_MIPS_HIGHER:
- case elfcpp::R_MIPS_HIGHEST:
- case elfcpp::R_MIPS_GPREL16:
- case elfcpp::R_MIPS16_HI16:
- case elfcpp::R_MIPS16_LO16:
- case elfcpp::R_MIPS_PC16:
- case elfcpp::R_MIPS_PCHI16:
- case elfcpp::R_MIPS_PCLO16:
- case elfcpp::R_MIPS_GOT16:
- case elfcpp::R_MIPS16_GOT16:
- case elfcpp::R_MIPS_CALL16:
- case elfcpp::R_MIPS16_CALL16:
- case elfcpp::R_MIPS_GOT_HI16:
- case elfcpp::R_MIPS_CALL_HI16:
- case elfcpp::R_MIPS_GOT_LO16:
- case elfcpp::R_MIPS_CALL_LO16:
- case elfcpp::R_MIPS_TLS_DTPREL_HI16:
- case elfcpp::R_MIPS_TLS_DTPREL_LO16:
- case elfcpp::R_MIPS_TLS_TPREL_HI16:
- case elfcpp::R_MIPS_TLS_TPREL_LO16:
- case elfcpp::R_MIPS16_GPREL:
- case elfcpp::R_MIPS_GOT_DISP:
- case elfcpp::R_MIPS_LITERAL:
- case elfcpp::R_MIPS_GOT_PAGE:
- case elfcpp::R_MIPS_GOT_OFST:
- case elfcpp::R_MIPS_TLS_GD:
- case elfcpp::R_MIPS_TLS_LDM:
- case elfcpp::R_MIPS_TLS_GOTTPREL:
- return 2;
- // These relocations are not byte sized
- case elfcpp::R_MIPS_26:
- case elfcpp::R_MIPS16_26:
- case elfcpp::R_MIPS_PC21_S2:
- case elfcpp::R_MIPS_PC26_S2:
- case elfcpp::R_MIPS_PC18_S3:
- case elfcpp::R_MIPS_PC19_S2:
- return 4;
- case elfcpp::R_MIPS_COPY:
- case elfcpp::R_MIPS_JUMP_SLOT:
- object->error(_("unexpected reloc %u in object file"), r_type);
- return 0;
- default:
- object->error(_("unsupported reloc %u in object file"), r_type);
- return 0;
- }
- }
- // Scan the relocs during a relocatable link.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::scan_relocatable_relocs(
- Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- size_t local_symbol_count,
- const unsigned char* plocal_symbols,
- Relocatable_relocs* rr)
- {
- if (sh_type == elfcpp::SHT_REL)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>
- Classify_reloc;
- typedef Mips_scan_relocatable_relocs<big_endian, Classify_reloc>
- Scan_relocatable_relocs;
- gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>(
- symtab,
- layout,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_symbols,
- rr);
- }
- else if (sh_type == elfcpp::SHT_RELA)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- typedef Mips_scan_relocatable_relocs<big_endian, Classify_reloc>
- Scan_relocatable_relocs;
- gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>(
- symtab,
- layout,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_symbols,
- rr);
- }
- else
- gold_unreachable();
- }
- // Scan the relocs for --emit-relocs.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::emit_relocs_scan(
- Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- bool needs_special_offset_handling,
- size_t local_symbol_count,
- const unsigned char* plocal_syms,
- Relocatable_relocs* rr)
- {
- if (sh_type == elfcpp::SHT_REL)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>
- Classify_reloc;
- typedef gold::Default_emit_relocs_strategy<Classify_reloc>
- Emit_relocs_strategy;
- gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>(
- symtab,
- layout,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_syms,
- rr);
- }
- else if (sh_type == elfcpp::SHT_RELA)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- typedef gold::Default_emit_relocs_strategy<Classify_reloc>
- Emit_relocs_strategy;
- gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>(
- symtab,
- layout,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_syms,
- rr);
- }
- else
- gold_unreachable();
- }
- // Emit relocations for a section.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::relocate_relocs(
- const Relocate_info<size, big_endian>* relinfo,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- typename elfcpp::Elf_types<size>::Elf_Off
- offset_in_output_section,
- unsigned char* view,
- Mips_address view_address,
- section_size_type view_size,
- unsigned char* reloc_view,
- section_size_type reloc_view_size)
- {
- if (sh_type == elfcpp::SHT_REL)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>
- Classify_reloc;
- gold::relocate_relocs<size, big_endian, Classify_reloc>(
- relinfo,
- prelocs,
- reloc_count,
- output_section,
- offset_in_output_section,
- view,
- view_address,
- view_size,
- reloc_view,
- reloc_view_size);
- }
- else if (sh_type == elfcpp::SHT_RELA)
- {
- typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- gold::relocate_relocs<size, big_endian, Classify_reloc>(
- relinfo,
- prelocs,
- reloc_count,
- output_section,
- offset_in_output_section,
- view,
- view_address,
- view_size,
- reloc_view,
- reloc_view_size);
- }
- else
- gold_unreachable();
- }
- // Perform target-specific processing in a relocatable link. This is
- // only used if we use the relocation strategy RELOC_SPECIAL.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::relocate_special_relocatable(
- const Relocate_info<size, big_endian>* relinfo,
- unsigned int sh_type,
- const unsigned char* preloc_in,
- size_t relnum,
- Output_section* output_section,
- typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
- unsigned char* view,
- Mips_address view_address,
- section_size_type,
- unsigned char* preloc_out)
- {
- // We can only handle REL type relocation sections.
- gold_assert(sh_type == elfcpp::SHT_REL);
- typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc
- Reltype;
- typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc_write
- Reltype_write;
- typedef Mips_relocate_functions<size, big_endian> Reloc_funcs;
- const Mips_address invalid_address = static_cast<Mips_address>(0) - 1;
- Mips_relobj<size, big_endian>* object =
- Mips_relobj<size, big_endian>::as_mips_relobj(relinfo->object);
- const unsigned int local_count = object->local_symbol_count();
- Reltype reloc(preloc_in);
- Reltype_write reloc_write(preloc_out);
- elfcpp::Elf_types<32>::Elf_WXword r_info = reloc.get_r_info();
- const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
- const unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
- // Get the new symbol index.
- // We only use RELOC_SPECIAL strategy in local relocations.
- gold_assert(r_sym < local_count);
- // We are adjusting a section symbol. We need to find
- // the symbol table index of the section symbol for
- // the output section corresponding to input section
- // in which this symbol is defined.
- bool is_ordinary;
- unsigned int shndx = object->local_symbol_input_shndx(r_sym, &is_ordinary);
- gold_assert(is_ordinary);
- Output_section* os = object->output_section(shndx);
- gold_assert(os != NULL);
- gold_assert(os->needs_symtab_index());
- unsigned int new_symndx = os->symtab_index();
- // Get the new offset--the location in the output section where
- // this relocation should be applied.
- Mips_address offset = reloc.get_r_offset();
- Mips_address new_offset;
- if (offset_in_output_section != invalid_address)
- new_offset = offset + offset_in_output_section;
- else
- {
- section_offset_type sot_offset =
- convert_types<section_offset_type, Mips_address>(offset);
- section_offset_type new_sot_offset =
- output_section->output_offset(object, relinfo->data_shndx,
- sot_offset);
- gold_assert(new_sot_offset != -1);
- new_offset = new_sot_offset;
- }
- // In an object file, r_offset is an offset within the section.
- // In an executable or dynamic object, generated by
- // --emit-relocs, r_offset is an absolute address.
- if (!parameters->options().relocatable())
- {
- new_offset += view_address;
- if (offset_in_output_section != invalid_address)
- new_offset -= offset_in_output_section;
- }
- reloc_write.put_r_offset(new_offset);
- reloc_write.put_r_info(elfcpp::elf_r_info<32>(new_symndx, r_type));
- // Handle the reloc addend.
- // The relocation uses a section symbol in the input file.
- // We are adjusting it to use a section symbol in the output
- // file. The input section symbol refers to some address in
- // the input section. We need the relocation in the output
- // file to refer to that same address. This adjustment to
- // the addend is the same calculation we use for a simple
- // absolute relocation for the input section symbol.
- Valtype calculated_value = 0;
- const Symbol_value<size>* psymval = object->local_symbol(r_sym);
- unsigned char* paddend = view + offset;
- typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY;
- switch (r_type)
- {
- case elfcpp::R_MIPS_26:
- reloc_status = Reloc_funcs::rel26(paddend, object, psymval,
- offset_in_output_section, true, 0, sh_type == elfcpp::SHT_REL, NULL,
- false /*TODO(sasa): cross mode jump*/, r_type, this->jal_to_bal(),
- false, &calculated_value);
- break;
- default:
- gold_unreachable();
- }
- // Report any errors.
- switch (reloc_status)
- {
- case Reloc_funcs::STATUS_OKAY:
- break;
- case Reloc_funcs::STATUS_OVERFLOW:
- gold_error_at_location(relinfo, relnum, reloc.get_r_offset(),
- _("relocation overflow: "
- "%u against local symbol %u in %s"),
- r_type, r_sym, object->name().c_str());
- break;
- case Reloc_funcs::STATUS_BAD_RELOC:
- gold_error_at_location(relinfo, relnum, reloc.get_r_offset(),
- _("unexpected opcode while processing relocation"));
- break;
- default:
- gold_unreachable();
- }
- }
- // Optimize the TLS relocation type based on what we know about the
- // symbol. IS_FINAL is true if the final address of this symbol is
- // known at link time.
- template<int size, bool big_endian>
- tls::Tls_optimization
- Target_mips<size, big_endian>::optimize_tls_reloc(bool, int)
- {
- // FIXME: Currently we do not do any TLS optimization.
- return tls::TLSOPT_NONE;
- }
- // Scan a relocation for a local symbol.
- template<int size, bool big_endian>
- inline void
- Target_mips<size, big_endian>::Scan::local(
- Symbol_table* symtab,
- Layout* layout,
- Target_mips<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Relatype* rela,
- const Reltype* rel,
- unsigned int rel_type,
- unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym,
- bool is_discarded)
- {
- if (is_discarded)
- return;
- Mips_address r_offset;
- unsigned int r_sym;
- typename elfcpp::Elf_types<size>::Elf_Swxword r_addend;
- if (rel_type == elfcpp::SHT_RELA)
- {
- r_offset = rela->get_r_offset();
- r_sym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>::
- get_r_sym(rela);
- r_addend = rela->get_r_addend();
- }
- else
- {
- r_offset = rel->get_r_offset();
- r_sym = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>::
- get_r_sym(rel);
- r_addend = 0;
- }
- Mips_relobj<size, big_endian>* mips_obj =
- Mips_relobj<size, big_endian>::as_mips_relobj(object);
- if (mips_obj->is_mips16_stub_section(data_shndx))
- {
- mips_obj->get_mips16_stub_section(data_shndx)
- ->new_local_reloc_found(r_type, r_sym);
- }
- if (r_type == elfcpp::R_MIPS_NONE)
- // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
- // mips16 stub.
- return;
- if (!mips16_call_reloc(r_type)
- && !mips_obj->section_allows_mips16_refs(data_shndx))
- // This reloc would need to refer to a MIPS16 hard-float stub, if
- // there is one. We ignore MIPS16 stub sections and .pdr section when
- // looking for relocs that would need to refer to MIPS16 stubs.
- mips_obj->add_local_non_16bit_call(r_sym);
- if (r_type == elfcpp::R_MIPS16_26
- && !mips_obj->section_allows_mips16_refs(data_shndx))
- mips_obj->add_local_16bit_call(r_sym);
- switch (r_type)
- {
- case elfcpp::R_MIPS_GOT16:
- case elfcpp::R_MIPS_CALL16:
- case elfcpp::R_MIPS_CALL_HI16:
- case elfcpp::R_MIPS_CALL_LO16:
- case elfcpp::R_MIPS_GOT_HI16:
- case elfcpp::R_MIPS_GOT_LO16:
- case elfcpp::R_MIPS_GOT_PAGE:
- case elfcpp::R_MIPS_GOT_OFST:
- case elfcpp::R_MIPS_GOT_DISP:
- case elfcpp::R_MIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS_TLS_GD:
- case elfcpp::R_MIPS_TLS_LDM:
- case elfcpp::R_MIPS16_GOT16:
- case elfcpp::R_MIPS16_CALL16:
- case elfcpp::R_MIPS16_TLS_GOTTPREL:
- case elfcpp::R_MIPS16_TLS_GD:
- case elfcpp::R_MIPS16_TLS_LDM:
- case elfcpp::R_MICROMIPS_GOT16:
- case elfcpp::R_MICROMIPS_CALL16:
- case elfcpp::R_MICROMIPS_CALL_HI16:
- case elfcpp::R_MICROMIPS_CALL_LO16:
- case elfcpp::R_MICROMIPS_GOT_HI16:
- case elfcpp::R_MICROMIPS_GOT_LO16:
- case elfcpp::R_MICROMIPS_GOT_PAGE:
- case elfcpp::R_MICROMIPS_GOT_OFST:
- case elfcpp::R_MICROMIPS_GOT_DISP:
- case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_GD:
- case elfcpp::R_MICROMIPS_TLS_LDM:
- case elfcpp::R_MIPS_EH:
- // We need a GOT section.
- target->got_section(symtab, layout);
- break;
- default:
- break;
- }
- if (call_lo16_reloc(r_type)
- || got_lo16_reloc(r_type)
- || got_disp_reloc(r_type)
- || eh_reloc(r_type))
- {
- // We may need a local GOT entry for this relocation. We
- // don't count R_MIPS_GOT_PAGE because we can estimate the
- // maximum number of pages needed by looking at the size of
- // the segment. Similar comments apply to R_MIPS*_GOT16 and
- // R_MIPS*_CALL16. We don't count R_MIPS_GOT_HI16, or
- // R_MIPS_CALL_HI16 because these are always followed by an
- // R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16.
- Mips_output_data_got<size, big_endian>* got =
- target->got_section(symtab, layout);
- bool is_section_symbol = lsym.get_st_type() == elfcpp::STT_SECTION;
- got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type, -1U,
- is_section_symbol);
- }
- switch (r_type)
- {
- case elfcpp::R_MIPS_CALL16:
- case elfcpp::R_MIPS16_CALL16:
- case elfcpp::R_MICROMIPS_CALL16:
- gold_error(_("CALL16 reloc at 0x%lx not against global symbol "),
- (unsigned long)r_offset);
- return;
- case elfcpp::R_MIPS_GOT_PAGE:
- case elfcpp::R_MICROMIPS_GOT_PAGE:
- case elfcpp::R_MIPS16_GOT16:
- case elfcpp::R_MIPS_GOT16:
- case elfcpp::R_MIPS_GOT_HI16:
- case elfcpp::R_MIPS_GOT_LO16:
- case elfcpp::R_MICROMIPS_GOT16:
- case elfcpp::R_MICROMIPS_GOT_HI16:
- case elfcpp::R_MICROMIPS_GOT_LO16:
- {
- // This relocation needs a page entry in the GOT.
- // Get the section contents.
- section_size_type view_size = 0;
- const unsigned char* view = object->section_contents(data_shndx,
- &view_size, false);
- view += r_offset;
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
- Valtype32 addend = (rel_type == elfcpp::SHT_REL ? val & 0xffff
- : r_addend);
- if (rel_type == elfcpp::SHT_REL && got16_reloc(r_type))
- target->got16_addends_.push_back(got16_addend<size, big_endian>(
- object, data_shndx, r_type, r_sym, addend));
- else
- target->got_section()->record_got_page_entry(mips_obj, r_sym, addend);
- break;
- }
- case elfcpp::R_MIPS_HI16:
- case elfcpp::R_MIPS_PCHI16:
- case elfcpp::R_MIPS16_HI16:
- case elfcpp::R_MICROMIPS_HI16:
- // Record the reloc so that we can check whether the corresponding LO16
- // part exists.
- if (rel_type == elfcpp::SHT_REL)
- target->got16_addends_.push_back(got16_addend<size, big_endian>(
- object, data_shndx, r_type, r_sym, 0));
- break;
- case elfcpp::R_MIPS_LO16:
- case elfcpp::R_MIPS_PCLO16:
- case elfcpp::R_MIPS16_LO16:
- case elfcpp::R_MICROMIPS_LO16:
- {
- if (rel_type != elfcpp::SHT_REL)
- break;
- // Find corresponding GOT16/HI16 relocation.
- // According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must
- // be immediately following. However, for the IRIX6 ABI, the next
- // relocation may be a composed relocation consisting of several
- // relocations for the same address. In that case, the R_MIPS_LO16
- // relocation may occur as one of these. We permit a similar
- // extension in general, as that is useful for GCC.
- // In some cases GCC dead code elimination removes the LO16 but
- // keeps the corresponding HI16. This is strictly speaking a
- // violation of the ABI but not immediately harmful.
- typename std::list<got16_addend<size, big_endian> >::iterator it =
- target->got16_addends_.begin();
- while (it != target->got16_addends_.end())
- {
- got16_addend<size, big_endian> _got16_addend = *it;
- // TODO(sasa): Split got16_addends_ list into two lists - one for
- // GOT16 relocs and the other for HI16 relocs.
- // Report an error if we find HI16 or GOT16 reloc from the
- // previous section without the matching LO16 part.
- if (_got16_addend.object != object
- || _got16_addend.shndx != data_shndx)
- {
- gold_error("Can't find matching LO16 reloc");
- break;
- }
- if (_got16_addend.r_sym != r_sym
- || !is_matching_lo16_reloc(_got16_addend.r_type, r_type))
- {
- ++it;
- continue;
- }
- // We found a matching HI16 or GOT16 reloc for this LO16 reloc.
- // For GOT16, we need to calculate combined addend and record GOT page
- // entry.
- if (got16_reloc(_got16_addend.r_type))
- {
- section_size_type view_size = 0;
- const unsigned char* view = object->section_contents(data_shndx,
- &view_size,
- false);
- view += r_offset;
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
- int32_t addend = Bits<16>::sign_extend32(val & 0xffff);
- addend = (_got16_addend.addend << 16) + addend;
- target->got_section()->record_got_page_entry(mips_obj, r_sym,
- addend);
- }
- it = target->got16_addends_.erase(it);
- }
- break;
- }
- }
- switch (r_type)
- {
- case elfcpp::R_MIPS_32:
- case elfcpp::R_MIPS_REL32:
- case elfcpp::R_MIPS_64:
- {
- if (parameters->options().output_is_position_independent())
- {
- // If building a shared library (or a position-independent
- // executable), we need to create a dynamic relocation for
- // this location.
- if (is_readonly_section(output_section))
- break;
- Reloc_section* rel_dyn = target->rel_dyn_section(layout);
- rel_dyn->add_symbolless_local_addend(object, r_sym,
- elfcpp::R_MIPS_REL32,
- output_section, data_shndx,
- r_offset);
- }
- break;
- }
- case elfcpp::R_MIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS16_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS_TLS_LDM:
- case elfcpp::R_MIPS16_TLS_LDM:
- case elfcpp::R_MICROMIPS_TLS_LDM:
- case elfcpp::R_MIPS_TLS_GD:
- case elfcpp::R_MIPS16_TLS_GD:
- case elfcpp::R_MICROMIPS_TLS_GD:
- {
- bool output_is_shared = parameters->options().shared();
- const tls::Tls_optimization optimized_type
- = Target_mips<size, big_endian>::optimize_tls_reloc(
- !output_is_shared, r_type);
- switch (r_type)
- {
- case elfcpp::R_MIPS_TLS_GD:
- case elfcpp::R_MIPS16_TLS_GD:
- case elfcpp::R_MICROMIPS_TLS_GD:
- if (optimized_type == tls::TLSOPT_NONE)
- {
- // Create a pair of GOT entries for the module index and
- // dtv-relative offset.
- Mips_output_data_got<size, big_endian>* got =
- target->got_section(symtab, layout);
- unsigned int shndx = lsym.get_st_shndx();
- bool is_ordinary;
- shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
- if (!is_ordinary)
- {
- object->error(_("local symbol %u has bad shndx %u"),
- r_sym, shndx);
- break;
- }
- got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type,
- shndx, false);
- }
- else
- {
- // FIXME: TLS optimization not supported yet.
- gold_unreachable();
- }
- break;
- case elfcpp::R_MIPS_TLS_LDM:
- case elfcpp::R_MIPS16_TLS_LDM:
- case elfcpp::R_MICROMIPS_TLS_LDM:
- if (optimized_type == tls::TLSOPT_NONE)
- {
- // We always record LDM symbols as local with index 0.
- target->got_section()->record_local_got_symbol(mips_obj, 0,
- r_addend, r_type,
- -1U, false);
- }
- else
- {
- // FIXME: TLS optimization not supported yet.
- gold_unreachable();
- }
- break;
- case elfcpp::R_MIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS16_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
- layout->set_has_static_tls();
- if (optimized_type == tls::TLSOPT_NONE)
- {
- // Create a GOT entry for the tp-relative offset.
- Mips_output_data_got<size, big_endian>* got =
- target->got_section(symtab, layout);
- got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type,
- -1U, false);
- }
- else
- {
- // FIXME: TLS optimization not supported yet.
- gold_unreachable();
- }
- break;
- default:
- gold_unreachable();
- }
- }
- break;
- default:
- break;
- }
- // Refuse some position-dependent relocations when creating a
- // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
- // not PIC, but we can create dynamic relocations and the result
- // will be fine. Also do not refuse R_MIPS_LO16, which can be
- // combined with R_MIPS_GOT16.
- if (parameters->options().shared())
- {
- switch (r_type)
- {
- case elfcpp::R_MIPS16_HI16:
- case elfcpp::R_MIPS_HI16:
- case elfcpp::R_MIPS_HIGHER:
- case elfcpp::R_MIPS_HIGHEST:
- case elfcpp::R_MICROMIPS_HI16:
- case elfcpp::R_MICROMIPS_HIGHER:
- case elfcpp::R_MICROMIPS_HIGHEST:
- // Don't refuse a high part relocation if it's against
- // no symbol (e.g. part of a compound relocation).
- if (r_sym == 0)
- break;
- // Fall through.
- case elfcpp::R_MIPS16_26:
- case elfcpp::R_MIPS_26:
- case elfcpp::R_MICROMIPS_26_S1:
- gold_error(_("%s: relocation %u against `%s' can not be used when "
- "making a shared object; recompile with -fPIC"),
- object->name().c_str(), r_type, "a local symbol");
- default:
- break;
- }
- }
- }
- template<int size, bool big_endian>
- inline void
- Target_mips<size, big_endian>::Scan::local(
- Symbol_table* symtab,
- Layout* layout,
- Target_mips<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Reltype& reloc,
- unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym,
- bool is_discarded)
- {
- if (is_discarded)
- return;
- local(
- symtab,
- layout,
- target,
- object,
- data_shndx,
- output_section,
- (const Relatype*) NULL,
- &reloc,
- elfcpp::SHT_REL,
- r_type,
- lsym, is_discarded);
- }
- template<int size, bool big_endian>
- inline void
- Target_mips<size, big_endian>::Scan::local(
- Symbol_table* symtab,
- Layout* layout,
- Target_mips<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Relatype& reloc,
- unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym,
- bool is_discarded)
- {
- if (is_discarded)
- return;
- local(
- symtab,
- layout,
- target,
- object,
- data_shndx,
- output_section,
- &reloc,
- (const Reltype*) NULL,
- elfcpp::SHT_RELA,
- r_type,
- lsym, is_discarded);
- }
- // Scan a relocation for a global symbol.
- template<int size, bool big_endian>
- inline void
- Target_mips<size, big_endian>::Scan::global(
- Symbol_table* symtab,
- Layout* layout,
- Target_mips<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Relatype* rela,
- const Reltype* rel,
- unsigned int rel_type,
- unsigned int r_type,
- Symbol* gsym)
- {
- Mips_address r_offset;
- unsigned int r_sym;
- typename elfcpp::Elf_types<size>::Elf_Swxword r_addend;
- if (rel_type == elfcpp::SHT_RELA)
- {
- r_offset = rela->get_r_offset();
- r_sym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>::
- get_r_sym(rela);
- r_addend = rela->get_r_addend();
- }
- else
- {
- r_offset = rel->get_r_offset();
- r_sym = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>::
- get_r_sym(rel);
- r_addend = 0;
- }
- Mips_relobj<size, big_endian>* mips_obj =
- Mips_relobj<size, big_endian>::as_mips_relobj(object);
- Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym);
- if (mips_obj->is_mips16_stub_section(data_shndx))
- {
- mips_obj->get_mips16_stub_section(data_shndx)
- ->new_global_reloc_found(r_type, mips_sym);
- }
- if (r_type == elfcpp::R_MIPS_NONE)
- // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
- // mips16 stub.
- return;
- if (!mips16_call_reloc(r_type)
- && !mips_obj->section_allows_mips16_refs(data_shndx))
- // This reloc would need to refer to a MIPS16 hard-float stub, if
- // there is one. We ignore MIPS16 stub sections and .pdr section when
- // looking for relocs that would need to refer to MIPS16 stubs.
- mips_sym->set_need_fn_stub();
- // We need PLT entries if there are static-only relocations against
- // an externally-defined function. This can technically occur for
- // shared libraries if there are branches to the symbol, although it
- // is unlikely that this will be used in practice due to the short
- // ranges involved. It can occur for any relative or absolute relocation
- // in executables; in that case, the PLT entry becomes the function's
- // canonical address.
- bool static_reloc = false;
- // Set CAN_MAKE_DYNAMIC to true if we can convert this
- // relocation into a dynamic one.
- bool can_make_dynamic = false;
- switch (r_type)
- {
- case elfcpp::R_MIPS_GOT16:
- case elfcpp::R_MIPS_CALL16:
- case elfcpp::R_MIPS_CALL_HI16:
- case elfcpp::R_MIPS_CALL_LO16:
- case elfcpp::R_MIPS_GOT_HI16:
- case elfcpp::R_MIPS_GOT_LO16:
- case elfcpp::R_MIPS_GOT_PAGE:
- case elfcpp::R_MIPS_GOT_OFST:
- case elfcpp::R_MIPS_GOT_DISP:
- case elfcpp::R_MIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS_TLS_GD:
- case elfcpp::R_MIPS_TLS_LDM:
- case elfcpp::R_MIPS16_GOT16:
- case elfcpp::R_MIPS16_CALL16:
- case elfcpp::R_MIPS16_TLS_GOTTPREL:
- case elfcpp::R_MIPS16_TLS_GD:
- case elfcpp::R_MIPS16_TLS_LDM:
- case elfcpp::R_MICROMIPS_GOT16:
- case elfcpp::R_MICROMIPS_CALL16:
- case elfcpp::R_MICROMIPS_CALL_HI16:
- case elfcpp::R_MICROMIPS_CALL_LO16:
- case elfcpp::R_MICROMIPS_GOT_HI16:
- case elfcpp::R_MICROMIPS_GOT_LO16:
- case elfcpp::R_MICROMIPS_GOT_PAGE:
- case elfcpp::R_MICROMIPS_GOT_OFST:
- case elfcpp::R_MICROMIPS_GOT_DISP:
- case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_GD:
- case elfcpp::R_MICROMIPS_TLS_LDM:
- case elfcpp::R_MIPS_EH:
- // We need a GOT section.
- target->got_section(symtab, layout);
- break;
- // This is just a hint; it can safely be ignored. Don't set
- // has_static_relocs for the corresponding symbol.
- case elfcpp::R_MIPS_JALR:
- case elfcpp::R_MICROMIPS_JALR:
- break;
- case elfcpp::R_MIPS_GPREL16:
- case elfcpp::R_MIPS_GPREL32:
- case elfcpp::R_MIPS16_GPREL:
- case elfcpp::R_MICROMIPS_GPREL16:
- // TODO(sasa)
- // GP-relative relocations always resolve to a definition in a
- // regular input file, ignoring the one-definition rule. This is
- // important for the GP setup sequence in NewABI code, which
- // always resolves to a local function even if other relocations
- // against the symbol wouldn't.
- //constrain_symbol_p = FALSE;
- break;
- case elfcpp::R_MIPS_32:
- case elfcpp::R_MIPS_REL32:
- case elfcpp::R_MIPS_64:
- if ((parameters->options().shared()
- || (strcmp(gsym->name(), "__gnu_local_gp") != 0
- && (!is_readonly_section(output_section)
- || mips_obj->is_pic())))
- && (output_section->flags() & elfcpp::SHF_ALLOC) != 0)
- {
- if (r_type != elfcpp::R_MIPS_REL32)
- mips_sym->set_pointer_equality_needed();
- can_make_dynamic = true;
- break;
- }
- // Fall through.
- default:
- // Most static relocations require pointer equality, except
- // for branches.
- mips_sym->set_pointer_equality_needed();
- // Fall through.
- case elfcpp::R_MIPS_26:
- case elfcpp::R_MIPS_PC16:
- case elfcpp::R_MIPS_PC21_S2:
- case elfcpp::R_MIPS_PC26_S2:
- case elfcpp::R_MIPS16_26:
- case elfcpp::R_MICROMIPS_26_S1:
- case elfcpp::R_MICROMIPS_PC7_S1:
- case elfcpp::R_MICROMIPS_PC10_S1:
- case elfcpp::R_MICROMIPS_PC16_S1:
- case elfcpp::R_MICROMIPS_PC23_S2:
- static_reloc = true;
- mips_sym->set_has_static_relocs();
- break;
- }
- // If there are call relocations against an externally-defined symbol,
- // see whether we can create a MIPS lazy-binding stub for it. We can
- // only do this if all references to the function are through call
- // relocations, and in that case, the traditional lazy-binding stubs
- // are much more efficient than PLT entries.
- switch (r_type)
- {
- case elfcpp::R_MIPS16_CALL16:
- case elfcpp::R_MIPS_CALL16:
- case elfcpp::R_MIPS_CALL_HI16:
- case elfcpp::R_MIPS_CALL_LO16:
- case elfcpp::R_MIPS_JALR:
- case elfcpp::R_MICROMIPS_CALL16:
- case elfcpp::R_MICROMIPS_CALL_HI16:
- case elfcpp::R_MICROMIPS_CALL_LO16:
- case elfcpp::R_MICROMIPS_JALR:
- if (!mips_sym->no_lazy_stub())
- {
- if ((mips_sym->needs_plt_entry() && mips_sym->is_from_dynobj())
- // Calls from shared objects to undefined symbols of type
- // STT_NOTYPE need lazy-binding stub.
- || (mips_sym->is_undefined() && parameters->options().shared()))
- target->mips_stubs_section(layout)->make_entry(mips_sym);
- }
- break;
- default:
- {
- // We must not create a stub for a symbol that has relocations
- // related to taking the function's address.
- mips_sym->set_no_lazy_stub();
- target->remove_lazy_stub_entry(mips_sym);
- break;
- }
- }
- if (relocation_needs_la25_stub<size, big_endian>(mips_obj, r_type,
- mips_sym->is_mips16()))
- mips_sym->set_has_nonpic_branches();
- // R_MIPS_HI16 against _gp_disp is used for $gp setup,
- // and has a special meaning.
- bool gp_disp_against_hi16 = (!mips_obj->is_newabi()
- && strcmp(gsym->name(), "_gp_disp") == 0
- && (hi16_reloc(r_type) || lo16_reloc(r_type)));
- if (static_reloc && gsym->needs_plt_entry())
- {
- target->make_plt_entry(symtab, layout, mips_sym, r_type);
- // Since this is not a PC-relative relocation, we may be
- // taking the address of a function. In that case we need to
- // set the entry in the dynamic symbol table to the address of
- // the PLT entry.
- if (gsym->is_from_dynobj() && !parameters->options().shared())
- {
- gsym->set_needs_dynsym_value();
- // We distinguish between PLT entries and lazy-binding stubs by
- // giving the former an st_other value of STO_MIPS_PLT. Set the
- // flag if there are any relocations in the binary where pointer
- // equality matters.
- if (mips_sym->pointer_equality_needed())
- mips_sym->set_mips_plt();
- }
- }
- if ((static_reloc || can_make_dynamic) && !gp_disp_against_hi16)
- {
- // Absolute addressing relocations.
- // Make a dynamic relocation if necessary.
- if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
- {
- if (gsym->may_need_copy_reloc())
- {
- target->copy_reloc(symtab, layout, object, data_shndx,
- output_section, gsym, r_type, r_offset);
- }
- else if (can_make_dynamic)
- {
- // Create .rel.dyn section.
- target->rel_dyn_section(layout);
- target->dynamic_reloc(mips_sym, elfcpp::R_MIPS_REL32, mips_obj,
- data_shndx, output_section, r_offset);
- }
- else
- gold_error(_("non-dynamic relocations refer to dynamic symbol %s"),
- gsym->name());
- }
- }
- bool for_call = false;
- switch (r_type)
- {
- case elfcpp::R_MIPS_CALL16:
- case elfcpp::R_MIPS16_CALL16:
- case elfcpp::R_MICROMIPS_CALL16:
- case elfcpp::R_MIPS_CALL_HI16:
- case elfcpp::R_MIPS_CALL_LO16:
- case elfcpp::R_MICROMIPS_CALL_HI16:
- case elfcpp::R_MICROMIPS_CALL_LO16:
- for_call = true;
- // Fall through.
- case elfcpp::R_MIPS16_GOT16:
- case elfcpp::R_MIPS_GOT16:
- case elfcpp::R_MIPS_GOT_HI16:
- case elfcpp::R_MIPS_GOT_LO16:
- case elfcpp::R_MICROMIPS_GOT16:
- case elfcpp::R_MICROMIPS_GOT_HI16:
- case elfcpp::R_MICROMIPS_GOT_LO16:
- case elfcpp::R_MIPS_GOT_DISP:
- case elfcpp::R_MICROMIPS_GOT_DISP:
- case elfcpp::R_MIPS_EH:
- {
- // The symbol requires a GOT entry.
- Mips_output_data_got<size, big_endian>* got =
- target->got_section(symtab, layout);
- got->record_global_got_symbol(mips_sym, mips_obj, r_type, false,
- for_call);
- mips_sym->set_global_got_area(GGA_NORMAL);
- }
- break;
- case elfcpp::R_MIPS_GOT_PAGE:
- case elfcpp::R_MICROMIPS_GOT_PAGE:
- {
- // This relocation needs a page entry in the GOT.
- // Get the section contents.
- section_size_type view_size = 0;
- const unsigned char* view =
- object->section_contents(data_shndx, &view_size, false);
- view += r_offset;
- Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
- Valtype32 addend = (rel_type == elfcpp::SHT_REL ? val & 0xffff
- : r_addend);
- Mips_output_data_got<size, big_endian>* got =
- target->got_section(symtab, layout);
- got->record_got_page_entry(mips_obj, r_sym, addend);
- // If this is a global, overridable symbol, GOT_PAGE will
- // decay to GOT_DISP, so we'll need a GOT entry for it.
- bool def_regular = (mips_sym->source() == Symbol::FROM_OBJECT
- && !mips_sym->object()->is_dynamic()
- && !mips_sym->is_undefined());
- if (!def_regular
- || (parameters->options().output_is_position_independent()
- && !parameters->options().Bsymbolic()
- && !mips_sym->is_forced_local()))
- {
- got->record_global_got_symbol(mips_sym, mips_obj, r_type, false,
- for_call);
- mips_sym->set_global_got_area(GGA_NORMAL);
- }
- }
- break;
- case elfcpp::R_MIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS16_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS_TLS_LDM:
- case elfcpp::R_MIPS16_TLS_LDM:
- case elfcpp::R_MICROMIPS_TLS_LDM:
- case elfcpp::R_MIPS_TLS_GD:
- case elfcpp::R_MIPS16_TLS_GD:
- case elfcpp::R_MICROMIPS_TLS_GD:
- {
- const bool is_final = gsym->final_value_is_known();
- const tls::Tls_optimization optimized_type =
- Target_mips<size, big_endian>::optimize_tls_reloc(is_final, r_type);
- switch (r_type)
- {
- case elfcpp::R_MIPS_TLS_GD:
- case elfcpp::R_MIPS16_TLS_GD:
- case elfcpp::R_MICROMIPS_TLS_GD:
- if (optimized_type == tls::TLSOPT_NONE)
- {
- // Create a pair of GOT entries for the module index and
- // dtv-relative offset.
- Mips_output_data_got<size, big_endian>* got =
- target->got_section(symtab, layout);
- got->record_global_got_symbol(mips_sym, mips_obj, r_type, false,
- false);
- }
- else
- {
- // FIXME: TLS optimization not supported yet.
- gold_unreachable();
- }
- break;
- case elfcpp::R_MIPS_TLS_LDM:
- case elfcpp::R_MIPS16_TLS_LDM:
- case elfcpp::R_MICROMIPS_TLS_LDM:
- if (optimized_type == tls::TLSOPT_NONE)
- {
- // We always record LDM symbols as local with index 0.
- target->got_section()->record_local_got_symbol(mips_obj, 0,
- r_addend, r_type,
- -1U, false);
- }
- else
- {
- // FIXME: TLS optimization not supported yet.
- gold_unreachable();
- }
- break;
- case elfcpp::R_MIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS16_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
- layout->set_has_static_tls();
- if (optimized_type == tls::TLSOPT_NONE)
- {
- // Create a GOT entry for the tp-relative offset.
- Mips_output_data_got<size, big_endian>* got =
- target->got_section(symtab, layout);
- got->record_global_got_symbol(mips_sym, mips_obj, r_type, false,
- false);
- }
- else
- {
- // FIXME: TLS optimization not supported yet.
- gold_unreachable();
- }
- break;
- default:
- gold_unreachable();
- }
- }
- break;
- case elfcpp::R_MIPS_COPY:
- case elfcpp::R_MIPS_JUMP_SLOT:
- // These are relocations which should only be seen by the
- // dynamic linker, and should never be seen here.
- gold_error(_("%s: unexpected reloc %u in object file"),
- object->name().c_str(), r_type);
- break;
- default:
- break;
- }
- // Refuse some position-dependent relocations when creating a
- // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
- // not PIC, but we can create dynamic relocations and the result
- // will be fine. Also do not refuse R_MIPS_LO16, which can be
- // combined with R_MIPS_GOT16.
- if (parameters->options().shared())
- {
- switch (r_type)
- {
- case elfcpp::R_MIPS16_HI16:
- case elfcpp::R_MIPS_HI16:
- case elfcpp::R_MIPS_HIGHER:
- case elfcpp::R_MIPS_HIGHEST:
- case elfcpp::R_MICROMIPS_HI16:
- case elfcpp::R_MICROMIPS_HIGHER:
- case elfcpp::R_MICROMIPS_HIGHEST:
- // Don't refuse a high part relocation if it's against
- // no symbol (e.g. part of a compound relocation).
- if (r_sym == 0)
- break;
- // R_MIPS_HI16 against _gp_disp is used for $gp setup,
- // and has a special meaning.
- if (!mips_obj->is_newabi() && strcmp(gsym->name(), "_gp_disp") == 0)
- break;
- // Fall through.
- case elfcpp::R_MIPS16_26:
- case elfcpp::R_MIPS_26:
- case elfcpp::R_MICROMIPS_26_S1:
- gold_error(_("%s: relocation %u against `%s' can not be used when "
- "making a shared object; recompile with -fPIC"),
- object->name().c_str(), r_type, gsym->name());
- default:
- break;
- }
- }
- }
- template<int size, bool big_endian>
- inline void
- Target_mips<size, big_endian>::Scan::global(
- Symbol_table* symtab,
- Layout* layout,
- Target_mips<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Relatype& reloc,
- unsigned int r_type,
- Symbol* gsym)
- {
- global(
- symtab,
- layout,
- target,
- object,
- data_shndx,
- output_section,
- &reloc,
- (const Reltype*) NULL,
- elfcpp::SHT_RELA,
- r_type,
- gsym);
- }
- template<int size, bool big_endian>
- inline void
- Target_mips<size, big_endian>::Scan::global(
- Symbol_table* symtab,
- Layout* layout,
- Target_mips<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const Reltype& reloc,
- unsigned int r_type,
- Symbol* gsym)
- {
- global(
- symtab,
- layout,
- target,
- object,
- data_shndx,
- output_section,
- (const Relatype*) NULL,
- &reloc,
- elfcpp::SHT_REL,
- r_type,
- gsym);
- }
- // Return whether a R_MIPS_32/R_MIPS64 relocation needs to be applied.
- // In cases where Scan::local() or Scan::global() has created
- // a dynamic relocation, the addend of the relocation is carried
- // in the data, and we must not apply the static relocation.
- template<int size, bool big_endian>
- inline bool
- Target_mips<size, big_endian>::Relocate::should_apply_static_reloc(
- const Mips_symbol<size>* gsym,
- unsigned int r_type,
- Output_section* output_section,
- Target_mips* target)
- {
- // If the output section is not allocated, then we didn't call
- // scan_relocs, we didn't create a dynamic reloc, and we must apply
- // the reloc here.
- if ((output_section->flags() & elfcpp::SHF_ALLOC) == 0)
- return true;
- if (gsym == NULL)
- return true;
- else
- {
- // For global symbols, we use the same helper routines used in the
- // scan pass.
- if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))
- && !gsym->may_need_copy_reloc())
- {
- // We have generated dynamic reloc (R_MIPS_REL32).
- bool multi_got = false;
- if (target->has_got_section())
- multi_got = target->got_section()->multi_got();
- bool has_got_offset;
- if (!multi_got)
- has_got_offset = gsym->has_got_offset(GOT_TYPE_STANDARD);
- else
- has_got_offset = gsym->global_gotoffset() != -1U;
- if (!has_got_offset)
- return true;
- else
- // Apply the relocation only if the symbol is in the local got.
- // Do not apply the relocation if the symbol is in the global
- // got.
- return symbol_references_local(gsym, gsym->has_dynsym_index());
- }
- else
- // We have not generated dynamic reloc.
- return true;
- }
- }
- // Perform a relocation.
- template<int size, bool big_endian>
- inline bool
- Target_mips<size, big_endian>::Relocate::relocate(
- const Relocate_info<size, big_endian>* relinfo,
- unsigned int rel_type,
- Target_mips* target,
- Output_section* output_section,
- size_t relnum,
- const unsigned char* preloc,
- const Sized_symbol<size>* gsym,
- const Symbol_value<size>* psymval,
- unsigned char* view,
- Mips_address address,
- section_size_type)
- {
- Mips_address r_offset;
- unsigned int r_sym;
- unsigned int r_type;
- unsigned int r_type2;
- unsigned int r_type3;
- unsigned char r_ssym;
- typename elfcpp::Elf_types<size>::Elf_Swxword r_addend;
- // r_offset and r_type of the next relocation is needed for resolving multiple
- // consecutive relocations with the same offset.
- Mips_address next_r_offset = static_cast<Mips_address>(0) - 1;
- unsigned int next_r_type = elfcpp::R_MIPS_NONE;
- elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr);
- size_t reloc_count = shdr.get_sh_size() / shdr.get_sh_entsize();
- if (rel_type == elfcpp::SHT_RELA)
- {
- const Relatype rela(preloc);
- r_offset = rela.get_r_offset();
- r_sym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>::
- get_r_sym(&rela);
- r_type = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>::
- get_r_type(&rela);
- r_type2 = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>::
- get_r_type2(&rela);
- r_type3 = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>::
- get_r_type3(&rela);
- r_ssym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>::
- get_r_ssym(&rela);
- r_addend = rela.get_r_addend();
- // If this is not last relocation, get r_offset and r_type of the next
- // relocation.
- if (relnum + 1 < reloc_count)
- {
- const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- const Relatype next_rela(preloc + reloc_size);
- next_r_offset = next_rela.get_r_offset();
- next_r_type =
- Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>::
- get_r_type(&next_rela);
- }
- }
- else
- {
- const Reltype rel(preloc);
- r_offset = rel.get_r_offset();
- r_sym = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>::
- get_r_sym(&rel);
- r_type = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>::
- get_r_type(&rel);
- r_ssym = 0;
- r_type2 = elfcpp::R_MIPS_NONE;
- r_type3 = elfcpp::R_MIPS_NONE;
- r_addend = 0;
- // If this is not last relocation, get r_offset and r_type of the next
- // relocation.
- if (relnum + 1 < reloc_count)
- {
- const int reloc_size = elfcpp::Elf_sizes<size>::rel_size;
- const Reltype next_rel(preloc + reloc_size);
- next_r_offset = next_rel.get_r_offset();
- next_r_type = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>::
- get_r_type(&next_rel);
- }
- }
- typedef Mips_relocate_functions<size, big_endian> Reloc_funcs;
- typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY;
- Mips_relobj<size, big_endian>* object =
- Mips_relobj<size, big_endian>::as_mips_relobj(relinfo->object);
- bool target_is_16_bit_code = false;
- bool target_is_micromips_code = false;
- bool cross_mode_jump;
- Symbol_value<size> symval;
- const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym);
- bool changed_symbol_value = false;
- if (gsym == NULL)
- {
- target_is_16_bit_code = object->local_symbol_is_mips16(r_sym);
- target_is_micromips_code = object->local_symbol_is_micromips(r_sym);
- if (target_is_16_bit_code || target_is_micromips_code)
- {
- // MIPS16/microMIPS text labels should be treated as odd.
- symval.set_output_value(psymval->value(object, 1));
- psymval = &symval;
- changed_symbol_value = true;
- }
- }
- else
- {
- target_is_16_bit_code = mips_sym->is_mips16();
- target_is_micromips_code = mips_sym->is_micromips();
- // If this is a mips16/microMIPS text symbol, add 1 to the value to make
- // it odd. This will cause something like .word SYM to come up with
- // the right value when it is loaded into the PC.
- if ((mips_sym->is_mips16() || mips_sym->is_micromips())
- && psymval->value(object, 0) != 0)
- {
- symval.set_output_value(psymval->value(object, 0) | 1);
- psymval = &symval;
- changed_symbol_value = true;
- }
- // Pick the value to use for symbols defined in shared objects.
- if (mips_sym->use_plt_offset(Scan::get_reference_flags(r_type))
- || mips_sym->has_lazy_stub())
- {
- Mips_address value;
- if (!mips_sym->has_lazy_stub())
- {
- // Prefer a standard MIPS PLT entry.
- if (mips_sym->has_mips_plt_offset())
- {
- value = target->plt_section()->mips_entry_address(mips_sym);
- target_is_micromips_code = false;
- target_is_16_bit_code = false;
- }
- else
- {
- value = (target->plt_section()->comp_entry_address(mips_sym)
- + 1);
- if (target->is_output_micromips())
- target_is_micromips_code = true;
- else
- target_is_16_bit_code = true;
- }
- }
- else
- value = target->mips_stubs_section()->stub_address(mips_sym);
- symval.set_output_value(value);
- psymval = &symval;
- }
- }
- // TRUE if the symbol referred to by this relocation is "_gp_disp".
- // Note that such a symbol must always be a global symbol.
- bool gp_disp = (gsym != NULL && (strcmp(gsym->name(), "_gp_disp") == 0)
- && !object->is_newabi());
- // TRUE if the symbol referred to by this relocation is "__gnu_local_gp".
- // Note that such a symbol must always be a global symbol.
- bool gnu_local_gp = gsym && (strcmp(gsym->name(), "__gnu_local_gp") == 0);
- if (gp_disp)
- {
- if (!hi16_reloc(r_type) && !lo16_reloc(r_type))
- gold_error_at_location(relinfo, relnum, r_offset,
- _("relocations against _gp_disp are permitted only"
- " with R_MIPS_HI16 and R_MIPS_LO16 relocations."));
- }
- else if (gnu_local_gp)
- {
- // __gnu_local_gp is _gp symbol.
- symval.set_output_value(target->adjusted_gp_value(object));
- psymval = &symval;
- }
- // If this is a reference to a 16-bit function with a stub, we need
- // to redirect the relocation to the stub unless:
- //
- // (a) the relocation is for a MIPS16 JAL;
- //
- // (b) the relocation is for a MIPS16 PIC call, and there are no
- // non-MIPS16 uses of the GOT slot; or
- //
- // (c) the section allows direct references to MIPS16 functions.
- if (r_type != elfcpp::R_MIPS16_26
- && ((mips_sym != NULL
- && mips_sym->has_mips16_fn_stub()
- && (r_type != elfcpp::R_MIPS16_CALL16 || mips_sym->need_fn_stub()))
- || (mips_sym == NULL
- && object->get_local_mips16_fn_stub(r_sym) != NULL))
- && !object->section_allows_mips16_refs(relinfo->data_shndx))
- {
- // This is a 32- or 64-bit call to a 16-bit function. We should
- // have already noticed that we were going to need the
- // stub.
- Mips_address value;
- if (mips_sym == NULL)
- value = object->get_local_mips16_fn_stub(r_sym)->output_address();
- else
- {
- gold_assert(mips_sym->need_fn_stub());
- if (mips_sym->has_la25_stub())
- value = target->la25_stub_section()->stub_address(mips_sym);
- else
- {
- value = mips_sym->template
- get_mips16_fn_stub<big_endian>()->output_address();
- }
- }
- symval.set_output_value(value);
- psymval = &symval;
- changed_symbol_value = true;
- // The target is 16-bit, but the stub isn't.
- target_is_16_bit_code = false;
- }
- // If this is a MIPS16 call with a stub, that is made through the PLT or
- // to a standard MIPS function, we need to redirect the call to the stub.
- // Note that we specifically exclude R_MIPS16_CALL16 from this behavior;
- // indirect calls should use an indirect stub instead.
- else if (r_type == elfcpp::R_MIPS16_26
- && ((mips_sym != NULL
- && (mips_sym->has_mips16_call_stub()
- || mips_sym->has_mips16_call_fp_stub()))
- || (mips_sym == NULL
- && object->get_local_mips16_call_stub(r_sym) != NULL))
- && ((mips_sym != NULL && mips_sym->has_plt_offset())
- || !target_is_16_bit_code))
- {
- Mips16_stub_section<size, big_endian>* call_stub;
- if (mips_sym == NULL)
- call_stub = object->get_local_mips16_call_stub(r_sym);
- else
- {
- // If both call_stub and call_fp_stub are defined, we can figure
- // out which one to use by checking which one appears in the input
- // file.
- if (mips_sym->has_mips16_call_stub()
- && mips_sym->has_mips16_call_fp_stub())
- {
- call_stub = NULL;
- for (unsigned int i = 1; i < object->shnum(); ++i)
- {
- if (object->is_mips16_call_fp_stub_section(i))
- {
- call_stub = mips_sym->template
- get_mips16_call_fp_stub<big_endian>();
- break;
- }
- }
- if (call_stub == NULL)
- call_stub =
- mips_sym->template get_mips16_call_stub<big_endian>();
- }
- else if (mips_sym->has_mips16_call_stub())
- call_stub = mips_sym->template get_mips16_call_stub<big_endian>();
- else
- call_stub = mips_sym->template get_mips16_call_fp_stub<big_endian>();
- }
- symval.set_output_value(call_stub->output_address());
- psymval = &symval;
- changed_symbol_value = true;
- }
- // If this is a direct call to a PIC function, redirect to the
- // non-PIC stub.
- else if (mips_sym != NULL
- && mips_sym->has_la25_stub()
- && relocation_needs_la25_stub<size, big_endian>(
- object, r_type, target_is_16_bit_code))
- {
- Mips_address value = target->la25_stub_section()->stub_address(mips_sym);
- if (mips_sym->is_micromips())
- value += 1;
- symval.set_output_value(value);
- psymval = &symval;
- }
- // For direct MIPS16 and microMIPS calls make sure the compressed PLT
- // entry is used if a standard PLT entry has also been made.
- else if ((r_type == elfcpp::R_MIPS16_26
- || r_type == elfcpp::R_MICROMIPS_26_S1)
- && mips_sym != NULL
- && mips_sym->has_plt_offset()
- && mips_sym->has_comp_plt_offset()
- && mips_sym->has_mips_plt_offset())
- {
- Mips_address value = (target->plt_section()->comp_entry_address(mips_sym)
- + 1);
- symval.set_output_value(value);
- psymval = &symval;
- target_is_16_bit_code = !target->is_output_micromips();
- target_is_micromips_code = target->is_output_micromips();
- }
- // Make sure MIPS16 and microMIPS are not used together.
- if ((r_type == elfcpp::R_MIPS16_26 && target_is_micromips_code)
- || (micromips_branch_reloc(r_type) && target_is_16_bit_code))
- {
- gold_error(_("MIPS16 and microMIPS functions cannot call each other"));
- }
- // Calls from 16-bit code to 32-bit code and vice versa require the
- // mode change. However, we can ignore calls to undefined weak symbols,
- // which should never be executed at runtime. This exception is important
- // because the assembly writer may have "known" that any definition of the
- // symbol would be 16-bit code, and that direct jumps were therefore
- // acceptable.
- cross_mode_jump =
- (!(gsym != NULL && gsym->is_weak_undefined())
- && ((r_type == elfcpp::R_MIPS16_26 && !target_is_16_bit_code)
- || (r_type == elfcpp::R_MICROMIPS_26_S1 && !target_is_micromips_code)
- || ((r_type == elfcpp::R_MIPS_26 || r_type == elfcpp::R_MIPS_JALR)
- && (target_is_16_bit_code || target_is_micromips_code))));
- bool local = (mips_sym == NULL
- || (mips_sym->got_only_for_calls()
- ? symbol_calls_local(mips_sym, mips_sym->has_dynsym_index())
- : symbol_references_local(mips_sym,
- mips_sym->has_dynsym_index())));
- // Global R_MIPS_GOT_PAGE/R_MICROMIPS_GOT_PAGE relocations are equivalent
- // to R_MIPS_GOT_DISP/R_MICROMIPS_GOT_DISP. The addend is applied by the
- // corresponding R_MIPS_GOT_OFST/R_MICROMIPS_GOT_OFST.
- if (got_page_reloc(r_type) && !local)
- r_type = (micromips_reloc(r_type) ? elfcpp::R_MICROMIPS_GOT_DISP
- : elfcpp::R_MIPS_GOT_DISP);
- unsigned int got_offset = 0;
- int gp_offset = 0;
- // Whether we have to extract addend from instruction.
- bool extract_addend = rel_type == elfcpp::SHT_REL;
- unsigned int r_types[3] = { r_type, r_type2, r_type3 };
- Reloc_funcs::mips_reloc_unshuffle(view, r_type, false);
- // For Mips64 N64 ABI, there may be up to three operations specified per
- // record, by the fields r_type, r_type2, and r_type3. The first operation
- // takes its addend from the relocation record. Each subsequent operation
- // takes as its addend the result of the previous operation.
- // The first operation in a record which references a symbol uses the symbol
- // implied by r_sym. The next operation in a record which references a symbol
- // uses the special symbol value given by the r_ssym field. A third operation
- // in a record which references a symbol will assume a NULL symbol,
- // i.e. value zero.
- // TODO(Vladimir)
- // Check if a record references to a symbol.
- for (unsigned int i = 0; i < 3; ++i)
- {
- if (r_types[i] == elfcpp::R_MIPS_NONE)
- break;
- // If we didn't apply previous relocation, use its result as addend
- // for current.
- if (this->calculate_only_)
- {
- r_addend = this->calculated_value_;
- extract_addend = false;
- }
- // In the N32 and 64-bit ABIs there may be multiple consecutive
- // relocations for the same offset. In that case we are
- // supposed to treat the output of each relocation as the addend
- // for the next. For N64 ABI, we are checking offsets only in a
- // third operation in a record (r_type3).
- this->calculate_only_ =
- (object->is_n64() && i < 2
- ? r_types[i+1] != elfcpp::R_MIPS_NONE
- : (r_offset == next_r_offset) && (next_r_type != elfcpp::R_MIPS_NONE));
- if (object->is_n64())
- {
- if (i == 1)
- {
- // Handle special symbol for r_type2 relocation type.
- switch (r_ssym)
- {
- case RSS_UNDEF:
- symval.set_output_value(0);
- break;
- case RSS_GP:
- symval.set_output_value(target->gp_value());
- break;
- case RSS_GP0:
- symval.set_output_value(object->gp_value());
- break;
- case RSS_LOC:
- symval.set_output_value(address);
- break;
- default:
- gold_unreachable();
- }
- psymval = &symval;
- }
- else if (i == 2)
- {
- // For r_type3 symbol value is 0.
- symval.set_output_value(0);
- }
- }
- bool update_got_entry = false;
- switch (r_types[i])
- {
- case elfcpp::R_MIPS_NONE:
- break;
- case elfcpp::R_MIPS_16:
- reloc_status = Reloc_funcs::rel16(view, object, psymval, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_32:
- if (should_apply_static_reloc(mips_sym, r_types[i], output_section,
- target))
- reloc_status = Reloc_funcs::rel32(view, object, psymval, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- if (mips_sym != NULL
- && (mips_sym->is_mips16() || mips_sym->is_micromips())
- && mips_sym->global_got_area() == GGA_RELOC_ONLY)
- {
- // If mips_sym->has_mips16_fn_stub() is false, symbol value is
- // already updated by adding +1.
- if (mips_sym->has_mips16_fn_stub())
- {
- gold_assert(mips_sym->need_fn_stub());
- Mips16_stub_section<size, big_endian>* fn_stub =
- mips_sym->template get_mips16_fn_stub<big_endian>();
- symval.set_output_value(fn_stub->output_address());
- psymval = &symval;
- }
- got_offset = mips_sym->global_gotoffset();
- update_got_entry = true;
- }
- break;
- case elfcpp::R_MIPS_64:
- if (should_apply_static_reloc(mips_sym, r_types[i], output_section,
- target))
- reloc_status = Reloc_funcs::rel64(view, object, psymval, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_, false);
- else if (target->is_output_n64() && r_addend != 0)
- // Only apply the addend. The static relocation was RELA, but the
- // dynamic relocation is REL, so we need to apply the addend.
- reloc_status = Reloc_funcs::rel64(view, object, psymval, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_, true);
- break;
- case elfcpp::R_MIPS_REL32:
- gold_unreachable();
- case elfcpp::R_MIPS_PC32:
- reloc_status = Reloc_funcs::relpc32(view, object, psymval, address,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS16_26:
- // The calculation for R_MIPS16_26 is just the same as for an
- // R_MIPS_26. It's only the storage of the relocated field into
- // the output file that's different. So, we just fall through to the
- // R_MIPS_26 case here.
- case elfcpp::R_MIPS_26:
- case elfcpp::R_MICROMIPS_26_S1:
- reloc_status = Reloc_funcs::rel26(view, object, psymval, address,
- gsym == NULL, r_addend, extract_addend, gsym, cross_mode_jump,
- r_types[i], target->jal_to_bal(), this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_HI16:
- case elfcpp::R_MIPS16_HI16:
- case elfcpp::R_MICROMIPS_HI16:
- if (rel_type == elfcpp::SHT_RELA)
- reloc_status = Reloc_funcs::do_relhi16(view, object, psymval,
- r_addend, address,
- gp_disp, r_types[i],
- extract_addend, 0,
- target,
- this->calculate_only_,
- &this->calculated_value_);
- else if (rel_type == elfcpp::SHT_REL)
- reloc_status = Reloc_funcs::relhi16(view, object, psymval, r_addend,
- address, gp_disp, r_types[i],
- r_sym, extract_addend);
- else
- gold_unreachable();
- break;
- case elfcpp::R_MIPS_LO16:
- case elfcpp::R_MIPS16_LO16:
- case elfcpp::R_MICROMIPS_LO16:
- case elfcpp::R_MICROMIPS_HI0_LO16:
- reloc_status = Reloc_funcs::rello16(target, view, object, psymval,
- r_addend, extract_addend, address,
- gp_disp, r_types[i], r_sym,
- rel_type, this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_LITERAL:
- case elfcpp::R_MICROMIPS_LITERAL:
- // Because we don't merge literal sections, we can handle this
- // just like R_MIPS_GPREL16. In the long run, we should merge
- // shared literals, and then we will need to additional work
- // here.
- // Fall through.
- case elfcpp::R_MIPS_GPREL16:
- case elfcpp::R_MIPS16_GPREL:
- case elfcpp::R_MICROMIPS_GPREL7_S2:
- case elfcpp::R_MICROMIPS_GPREL16:
- reloc_status = Reloc_funcs::relgprel(view, object, psymval,
- target->adjusted_gp_value(object),
- r_addend, extract_addend,
- gsym == NULL, r_types[i],
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_PC16:
- reloc_status = Reloc_funcs::relpc16(view, object, psymval, address,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_PC21_S2:
- reloc_status = Reloc_funcs::relpc21(view, object, psymval, address,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_PC26_S2:
- reloc_status = Reloc_funcs::relpc26(view, object, psymval, address,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_PC18_S3:
- reloc_status = Reloc_funcs::relpc18(view, object, psymval, address,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_PC19_S2:
- reloc_status = Reloc_funcs::relpc19(view, object, psymval, address,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_PCHI16:
- if (rel_type == elfcpp::SHT_RELA)
- reloc_status = Reloc_funcs::do_relpchi16(view, object, psymval,
- r_addend, address,
- extract_addend, 0,
- this->calculate_only_,
- &this->calculated_value_);
- else if (rel_type == elfcpp::SHT_REL)
- reloc_status = Reloc_funcs::relpchi16(view, object, psymval,
- r_addend, address, r_sym,
- extract_addend);
- else
- gold_unreachable();
- break;
- case elfcpp::R_MIPS_PCLO16:
- reloc_status = Reloc_funcs::relpclo16(view, object, psymval, r_addend,
- extract_addend, address, r_sym,
- rel_type, this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MICROMIPS_PC7_S1:
- reloc_status = Reloc_funcs::relmicromips_pc7_s1(view, object, psymval,
- address, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MICROMIPS_PC10_S1:
- reloc_status = Reloc_funcs::relmicromips_pc10_s1(view, object,
- psymval, address,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MICROMIPS_PC16_S1:
- reloc_status = Reloc_funcs::relmicromips_pc16_s1(view, object,
- psymval, address,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_GPREL32:
- reloc_status = Reloc_funcs::relgprel32(view, object, psymval,
- target->adjusted_gp_value(object),
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_GOT_HI16:
- case elfcpp::R_MIPS_CALL_HI16:
- case elfcpp::R_MICROMIPS_GOT_HI16:
- case elfcpp::R_MICROMIPS_CALL_HI16:
- if (gsym != NULL)
- got_offset = target->got_section()->got_offset(gsym,
- GOT_TYPE_STANDARD,
- object);
- else
- got_offset = target->got_section()->got_offset(r_sym,
- GOT_TYPE_STANDARD,
- object, r_addend);
- gp_offset = target->got_section()->gp_offset(got_offset, object);
- reloc_status = Reloc_funcs::relgot_hi16(view, gp_offset,
- this->calculate_only_,
- &this->calculated_value_);
- update_got_entry = changed_symbol_value;
- break;
- case elfcpp::R_MIPS_GOT_LO16:
- case elfcpp::R_MIPS_CALL_LO16:
- case elfcpp::R_MICROMIPS_GOT_LO16:
- case elfcpp::R_MICROMIPS_CALL_LO16:
- if (gsym != NULL)
- got_offset = target->got_section()->got_offset(gsym,
- GOT_TYPE_STANDARD,
- object);
- else
- got_offset = target->got_section()->got_offset(r_sym,
- GOT_TYPE_STANDARD,
- object, r_addend);
- gp_offset = target->got_section()->gp_offset(got_offset, object);
- reloc_status = Reloc_funcs::relgot_lo16(view, gp_offset,
- this->calculate_only_,
- &this->calculated_value_);
- update_got_entry = changed_symbol_value;
- break;
- case elfcpp::R_MIPS_GOT_DISP:
- case elfcpp::R_MICROMIPS_GOT_DISP:
- case elfcpp::R_MIPS_EH:
- if (gsym != NULL)
- got_offset = target->got_section()->got_offset(gsym,
- GOT_TYPE_STANDARD,
- object);
- else
- got_offset = target->got_section()->got_offset(r_sym,
- GOT_TYPE_STANDARD,
- object, r_addend);
- gp_offset = target->got_section()->gp_offset(got_offset, object);
- if (eh_reloc(r_types[i]))
- reloc_status = Reloc_funcs::releh(view, gp_offset,
- this->calculate_only_,
- &this->calculated_value_);
- else
- reloc_status = Reloc_funcs::relgot(view, gp_offset,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_CALL16:
- case elfcpp::R_MIPS16_CALL16:
- case elfcpp::R_MICROMIPS_CALL16:
- gold_assert(gsym != NULL);
- got_offset = target->got_section()->got_offset(gsym,
- GOT_TYPE_STANDARD,
- object);
- gp_offset = target->got_section()->gp_offset(got_offset, object);
- reloc_status = Reloc_funcs::relgot(view, gp_offset,
- this->calculate_only_,
- &this->calculated_value_);
- // TODO(sasa): We should also initialize update_got_entry
- // in other place swhere relgot is called.
- update_got_entry = changed_symbol_value;
- break;
- case elfcpp::R_MIPS_GOT16:
- case elfcpp::R_MIPS16_GOT16:
- case elfcpp::R_MICROMIPS_GOT16:
- if (gsym != NULL)
- {
- got_offset = target->got_section()->got_offset(gsym,
- GOT_TYPE_STANDARD,
- object);
- gp_offset = target->got_section()->gp_offset(got_offset, object);
- reloc_status = Reloc_funcs::relgot(view, gp_offset,
- this->calculate_only_,
- &this->calculated_value_);
- }
- else
- {
- if (rel_type == elfcpp::SHT_RELA)
- reloc_status = Reloc_funcs::do_relgot16_local(view, object,
- psymval, r_addend,
- extract_addend, 0,
- target,
- this->calculate_only_,
- &this->calculated_value_);
- else if (rel_type == elfcpp::SHT_REL)
- reloc_status = Reloc_funcs::relgot16_local(view, object,
- psymval, r_addend,
- extract_addend,
- r_types[i], r_sym);
- else
- gold_unreachable();
- }
- update_got_entry = changed_symbol_value;
- break;
- case elfcpp::R_MIPS_TLS_GD:
- case elfcpp::R_MIPS16_TLS_GD:
- case elfcpp::R_MICROMIPS_TLS_GD:
- if (gsym != NULL)
- got_offset = target->got_section()->got_offset(gsym,
- GOT_TYPE_TLS_PAIR,
- object);
- else
- got_offset = target->got_section()->got_offset(r_sym,
- GOT_TYPE_TLS_PAIR,
- object, r_addend);
- gp_offset = target->got_section()->gp_offset(got_offset, object);
- reloc_status = Reloc_funcs::relgot(view, gp_offset,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS16_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
- if (gsym != NULL)
- got_offset = target->got_section()->got_offset(gsym,
- GOT_TYPE_TLS_OFFSET,
- object);
- else
- got_offset = target->got_section()->got_offset(r_sym,
- GOT_TYPE_TLS_OFFSET,
- object, r_addend);
- gp_offset = target->got_section()->gp_offset(got_offset, object);
- reloc_status = Reloc_funcs::relgot(view, gp_offset,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_TLS_LDM:
- case elfcpp::R_MIPS16_TLS_LDM:
- case elfcpp::R_MICROMIPS_TLS_LDM:
- // Relocate the field with the offset of the GOT entry for
- // the module index.
- got_offset = target->got_section()->tls_ldm_offset(object);
- gp_offset = target->got_section()->gp_offset(got_offset, object);
- reloc_status = Reloc_funcs::relgot(view, gp_offset,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_GOT_PAGE:
- case elfcpp::R_MICROMIPS_GOT_PAGE:
- reloc_status = Reloc_funcs::relgotpage(target, view, object, psymval,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_GOT_OFST:
- case elfcpp::R_MICROMIPS_GOT_OFST:
- reloc_status = Reloc_funcs::relgotofst(target, view, object, psymval,
- r_addend, extract_addend,
- local, this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_JALR:
- case elfcpp::R_MICROMIPS_JALR:
- // This relocation is only a hint. In some cases, we optimize
- // it into a bal instruction. But we don't try to optimize
- // when the symbol does not resolve locally.
- if (gsym == NULL
- || symbol_calls_local(gsym, gsym->has_dynsym_index()))
- reloc_status = Reloc_funcs::reljalr(view, object, psymval, address,
- r_addend, extract_addend,
- cross_mode_jump, r_types[i],
- target->jalr_to_bal(),
- target->jr_to_b(),
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_TLS_DTPREL_HI16:
- case elfcpp::R_MIPS16_TLS_DTPREL_HI16:
- case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16:
- reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval,
- elfcpp::DTP_OFFSET, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_TLS_DTPREL_LO16:
- case elfcpp::R_MIPS16_TLS_DTPREL_LO16:
- case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16:
- reloc_status = Reloc_funcs::tlsrello16(view, object, psymval,
- elfcpp::DTP_OFFSET, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_TLS_DTPREL32:
- case elfcpp::R_MIPS_TLS_DTPREL64:
- reloc_status = Reloc_funcs::tlsrel32(view, object, psymval,
- elfcpp::DTP_OFFSET, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_TLS_TPREL_HI16:
- case elfcpp::R_MIPS16_TLS_TPREL_HI16:
- case elfcpp::R_MICROMIPS_TLS_TPREL_HI16:
- reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval,
- elfcpp::TP_OFFSET, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_TLS_TPREL_LO16:
- case elfcpp::R_MIPS16_TLS_TPREL_LO16:
- case elfcpp::R_MICROMIPS_TLS_TPREL_LO16:
- reloc_status = Reloc_funcs::tlsrello16(view, object, psymval,
- elfcpp::TP_OFFSET, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_TLS_TPREL32:
- case elfcpp::R_MIPS_TLS_TPREL64:
- reloc_status = Reloc_funcs::tlsrel32(view, object, psymval,
- elfcpp::TP_OFFSET, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_SUB:
- case elfcpp::R_MICROMIPS_SUB:
- reloc_status = Reloc_funcs::relsub(view, object, psymval, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_HIGHER:
- case elfcpp::R_MICROMIPS_HIGHER:
- reloc_status = Reloc_funcs::relhigher(view, object, psymval, r_addend,
- extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- case elfcpp::R_MIPS_HIGHEST:
- case elfcpp::R_MICROMIPS_HIGHEST:
- reloc_status = Reloc_funcs::relhighest(view, object, psymval,
- r_addend, extract_addend,
- this->calculate_only_,
- &this->calculated_value_);
- break;
- default:
- gold_error_at_location(relinfo, relnum, r_offset,
- _("unsupported reloc %u"), r_types[i]);
- break;
- }
- if (update_got_entry)
- {
- Mips_output_data_got<size, big_endian>* got = target->got_section();
- if (mips_sym != NULL && mips_sym->get_applied_secondary_got_fixup())
- got->update_got_entry(got->get_primary_got_offset(mips_sym),
- psymval->value(object, 0));
- else
- got->update_got_entry(got_offset, psymval->value(object, 0));
- }
- }
- bool jal_shuffle = jal_reloc(r_type);
- Reloc_funcs::mips_reloc_shuffle(view, r_type, jal_shuffle);
- // Report any errors.
- switch (reloc_status)
- {
- case Reloc_funcs::STATUS_OKAY:
- break;
- case Reloc_funcs::STATUS_OVERFLOW:
- if (gsym == NULL)
- gold_error_at_location(relinfo, relnum, r_offset,
- _("relocation overflow: "
- "%u against local symbol %u in %s"),
- r_type, r_sym, object->name().c_str());
- else if (gsym->is_defined() && gsym->source() == Symbol::FROM_OBJECT)
- gold_error_at_location(relinfo, relnum, r_offset,
- _("relocation overflow: "
- "%u against '%s' defined in %s"),
- r_type, gsym->demangled_name().c_str(),
- gsym->object()->name().c_str());
- else
- gold_error_at_location(relinfo, relnum, r_offset,
- _("relocation overflow: %u against '%s'"),
- r_type, gsym->demangled_name().c_str());
- break;
- case Reloc_funcs::STATUS_BAD_RELOC:
- gold_error_at_location(relinfo, relnum, r_offset,
- _("unexpected opcode while processing relocation"));
- break;
- case Reloc_funcs::STATUS_PCREL_UNALIGNED:
- gold_error_at_location(relinfo, relnum, r_offset,
- _("unaligned PC-relative relocation"));
- break;
- default:
- gold_unreachable();
- }
- return true;
- }
- // Get the Reference_flags for a particular relocation.
- template<int size, bool big_endian>
- int
- Target_mips<size, big_endian>::Scan::get_reference_flags(
- unsigned int r_type)
- {
- switch (r_type)
- {
- case elfcpp::R_MIPS_NONE:
- // No symbol reference.
- return 0;
- case elfcpp::R_MIPS_16:
- case elfcpp::R_MIPS_32:
- case elfcpp::R_MIPS_64:
- case elfcpp::R_MIPS_HI16:
- case elfcpp::R_MIPS_LO16:
- case elfcpp::R_MIPS_HIGHER:
- case elfcpp::R_MIPS_HIGHEST:
- case elfcpp::R_MIPS16_HI16:
- case elfcpp::R_MIPS16_LO16:
- case elfcpp::R_MICROMIPS_HI16:
- case elfcpp::R_MICROMIPS_LO16:
- case elfcpp::R_MICROMIPS_HIGHER:
- case elfcpp::R_MICROMIPS_HIGHEST:
- return Symbol::ABSOLUTE_REF;
- case elfcpp::R_MIPS_26:
- case elfcpp::R_MIPS16_26:
- case elfcpp::R_MICROMIPS_26_S1:
- return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
- case elfcpp::R_MIPS_PC18_S3:
- case elfcpp::R_MIPS_PC19_S2:
- case elfcpp::R_MIPS_PCHI16:
- case elfcpp::R_MIPS_PCLO16:
- case elfcpp::R_MIPS_GPREL32:
- case elfcpp::R_MIPS_GPREL16:
- case elfcpp::R_MIPS_REL32:
- case elfcpp::R_MIPS16_GPREL:
- return Symbol::RELATIVE_REF;
- case elfcpp::R_MIPS_PC16:
- case elfcpp::R_MIPS_PC32:
- case elfcpp::R_MIPS_PC21_S2:
- case elfcpp::R_MIPS_PC26_S2:
- case elfcpp::R_MIPS_JALR:
- case elfcpp::R_MICROMIPS_JALR:
- return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
- case elfcpp::R_MIPS_GOT16:
- case elfcpp::R_MIPS_CALL16:
- case elfcpp::R_MIPS_GOT_DISP:
- case elfcpp::R_MIPS_GOT_HI16:
- case elfcpp::R_MIPS_GOT_LO16:
- case elfcpp::R_MIPS_CALL_HI16:
- case elfcpp::R_MIPS_CALL_LO16:
- case elfcpp::R_MIPS_LITERAL:
- case elfcpp::R_MIPS_GOT_PAGE:
- case elfcpp::R_MIPS_GOT_OFST:
- case elfcpp::R_MIPS16_GOT16:
- case elfcpp::R_MIPS16_CALL16:
- case elfcpp::R_MICROMIPS_GOT16:
- case elfcpp::R_MICROMIPS_CALL16:
- case elfcpp::R_MICROMIPS_GOT_HI16:
- case elfcpp::R_MICROMIPS_GOT_LO16:
- case elfcpp::R_MICROMIPS_CALL_HI16:
- case elfcpp::R_MICROMIPS_CALL_LO16:
- case elfcpp::R_MIPS_EH:
- // Absolute in GOT.
- return Symbol::RELATIVE_REF;
- case elfcpp::R_MIPS_TLS_DTPMOD32:
- case elfcpp::R_MIPS_TLS_DTPREL32:
- case elfcpp::R_MIPS_TLS_DTPMOD64:
- case elfcpp::R_MIPS_TLS_DTPREL64:
- case elfcpp::R_MIPS_TLS_GD:
- case elfcpp::R_MIPS_TLS_LDM:
- case elfcpp::R_MIPS_TLS_DTPREL_HI16:
- case elfcpp::R_MIPS_TLS_DTPREL_LO16:
- case elfcpp::R_MIPS_TLS_GOTTPREL:
- case elfcpp::R_MIPS_TLS_TPREL32:
- case elfcpp::R_MIPS_TLS_TPREL64:
- case elfcpp::R_MIPS_TLS_TPREL_HI16:
- case elfcpp::R_MIPS_TLS_TPREL_LO16:
- case elfcpp::R_MIPS16_TLS_GD:
- case elfcpp::R_MIPS16_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_GD:
- case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
- case elfcpp::R_MICROMIPS_TLS_TPREL_HI16:
- case elfcpp::R_MICROMIPS_TLS_TPREL_LO16:
- return Symbol::TLS_REF;
- case elfcpp::R_MIPS_COPY:
- case elfcpp::R_MIPS_JUMP_SLOT:
- default:
- // Not expected. We will give an error later.
- return 0;
- }
- }
- // Report an unsupported relocation against a local symbol.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::Scan::unsupported_reloc_local(
- Sized_relobj_file<size, big_endian>* object,
- unsigned int r_type)
- {
- gold_error(_("%s: unsupported reloc %u against local symbol"),
- object->name().c_str(), r_type);
- }
- // Report an unsupported relocation against a global symbol.
- template<int size, bool big_endian>
- void
- Target_mips<size, big_endian>::Scan::unsupported_reloc_global(
- Sized_relobj_file<size, big_endian>* object,
- unsigned int r_type,
- Symbol* gsym)
- {
- gold_error(_("%s: unsupported reloc %u against global symbol %s"),
- object->name().c_str(), r_type, gsym->demangled_name().c_str());
- }
- // Return printable name for ABI.
- template<int size, bool big_endian>
- const char*
- Target_mips<size, big_endian>::elf_mips_abi_name(elfcpp::Elf_Word e_flags)
- {
- switch (e_flags & elfcpp::EF_MIPS_ABI)
- {
- case 0:
- if ((e_flags & elfcpp::EF_MIPS_ABI2) != 0)
- return "N32";
- else if (size == 64)
- return "64";
- else
- return "none";
- case elfcpp::E_MIPS_ABI_O32:
- return "O32";
- case elfcpp::E_MIPS_ABI_O64:
- return "O64";
- case elfcpp::E_MIPS_ABI_EABI32:
- return "EABI32";
- case elfcpp::E_MIPS_ABI_EABI64:
- return "EABI64";
- default:
- return "unknown abi";
- }
- }
- template<int size, bool big_endian>
- const char*
- Target_mips<size, big_endian>::elf_mips_mach_name(elfcpp::Elf_Word e_flags)
- {
- switch (e_flags & elfcpp::EF_MIPS_MACH)
- {
- case elfcpp::E_MIPS_MACH_3900:
- return "mips:3900";
- case elfcpp::E_MIPS_MACH_4010:
- return "mips:4010";
- case elfcpp::E_MIPS_MACH_4100:
- return "mips:4100";
- case elfcpp::E_MIPS_MACH_4111:
- return "mips:4111";
- case elfcpp::E_MIPS_MACH_4120:
- return "mips:4120";
- case elfcpp::E_MIPS_MACH_4650:
- return "mips:4650";
- case elfcpp::E_MIPS_MACH_5400:
- return "mips:5400";
- case elfcpp::E_MIPS_MACH_5500:
- return "mips:5500";
- case elfcpp::E_MIPS_MACH_5900:
- return "mips:5900";
- case elfcpp::E_MIPS_MACH_SB1:
- return "mips:sb1";
- case elfcpp::E_MIPS_MACH_9000:
- return "mips:9000";
- case elfcpp::E_MIPS_MACH_LS2E:
- return "mips:loongson_2e";
- case elfcpp::E_MIPS_MACH_LS2F:
- return "mips:loongson_2f";
- case elfcpp::E_MIPS_MACH_GS464:
- return "mips:gs464";
- case elfcpp::E_MIPS_MACH_GS464E:
- return "mips:gs464e";
- case elfcpp::E_MIPS_MACH_GS264E:
- return "mips:gs264e";
- case elfcpp::E_MIPS_MACH_OCTEON:
- return "mips:octeon";
- case elfcpp::E_MIPS_MACH_OCTEON2:
- return "mips:octeon2";
- case elfcpp::E_MIPS_MACH_OCTEON3:
- return "mips:octeon3";
- case elfcpp::E_MIPS_MACH_XLR:
- return "mips:xlr";
- default:
- switch (e_flags & elfcpp::EF_MIPS_ARCH)
- {
- default:
- case elfcpp::E_MIPS_ARCH_1:
- return "mips:3000";
- case elfcpp::E_MIPS_ARCH_2:
- return "mips:6000";
- case elfcpp::E_MIPS_ARCH_3:
- return "mips:4000";
- case elfcpp::E_MIPS_ARCH_4:
- return "mips:8000";
- case elfcpp::E_MIPS_ARCH_5:
- return "mips:mips5";
- case elfcpp::E_MIPS_ARCH_32:
- return "mips:isa32";
- case elfcpp::E_MIPS_ARCH_64:
- return "mips:isa64";
- case elfcpp::E_MIPS_ARCH_32R2:
- return "mips:isa32r2";
- case elfcpp::E_MIPS_ARCH_32R6:
- return "mips:isa32r6";
- case elfcpp::E_MIPS_ARCH_64R2:
- return "mips:isa64r2";
- case elfcpp::E_MIPS_ARCH_64R6:
- return "mips:isa64r6";
- }
- }
- return "unknown CPU";
- }
- template<int size, bool big_endian>
- const Target::Target_info Target_mips<size, big_endian>::mips_info =
- {
- size, // size
- big_endian, // is_big_endian
- elfcpp::EM_MIPS, // machine_code
- true, // has_make_symbol
- false, // has_resolve
- false, // has_code_fill
- true, // is_default_stack_executable
- false, // can_icf_inline_merge_sections
- '\0', // wrap_char
- size == 32 ? "/lib/ld.so.1" : "/lib64/ld.so.1", // dynamic_linker
- 0x400000, // default_text_segment_address
- 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
- 4 * 1024, // common_pagesize (overridable by -z common-page-size)
- false, // isolate_execinstr
- 0, // rosegment_gap
- elfcpp::SHN_UNDEF, // small_common_shndx
- elfcpp::SHN_UNDEF, // large_common_shndx
- 0, // small_common_section_flags
- 0, // large_common_section_flags
- NULL, // attributes_section
- NULL, // attributes_vendor
- "__start", // entry_symbol_name
- 32, // hash_entry_size
- elfcpp::SHT_PROGBITS, // unwind_section_type
- };
- template<int size, bool big_endian>
- class Target_mips_nacl : public Target_mips<size, big_endian>
- {
- public:
- Target_mips_nacl()
- : Target_mips<size, big_endian>(&mips_nacl_info)
- { }
- private:
- static const Target::Target_info mips_nacl_info;
- };
- template<int size, bool big_endian>
- const Target::Target_info Target_mips_nacl<size, big_endian>::mips_nacl_info =
- {
- size, // size
- big_endian, // is_big_endian
- elfcpp::EM_MIPS, // machine_code
- true, // has_make_symbol
- false, // has_resolve
- false, // has_code_fill
- true, // is_default_stack_executable
- false, // can_icf_inline_merge_sections
- '\0', // wrap_char
- "/lib/ld.so.1", // dynamic_linker
- 0x20000, // default_text_segment_address
- 0x10000, // abi_pagesize (overridable by -z max-page-size)
- 0x10000, // common_pagesize (overridable by -z common-page-size)
- true, // isolate_execinstr
- 0x10000000, // rosegment_gap
- elfcpp::SHN_UNDEF, // small_common_shndx
- elfcpp::SHN_UNDEF, // large_common_shndx
- 0, // small_common_section_flags
- 0, // large_common_section_flags
- NULL, // attributes_section
- NULL, // attributes_vendor
- "_start", // entry_symbol_name
- 32, // hash_entry_size
- elfcpp::SHT_PROGBITS, // unwind_section_type
- };
- // Target selector for Mips. Note this is never instantiated directly.
- // It's only used in Target_selector_mips_nacl, below.
- template<int size, bool big_endian>
- class Target_selector_mips : public Target_selector
- {
- public:
- Target_selector_mips()
- : Target_selector(elfcpp::EM_MIPS, size, big_endian,
- (size == 64 ?
- (big_endian ? "elf64-tradbigmips" : "elf64-tradlittlemips") :
- (big_endian ? "elf32-tradbigmips" : "elf32-tradlittlemips")),
- (size == 64 ?
- (big_endian ? "elf64btsmip" : "elf64ltsmip") :
- (big_endian ? "elf32btsmip" : "elf32ltsmip")))
- { }
- Target* do_instantiate_target()
- { return new Target_mips<size, big_endian>(); }
- };
- template<int size, bool big_endian>
- class Target_selector_mips_nacl
- : public Target_selector_nacl<Target_selector_mips<size, big_endian>,
- Target_mips_nacl<size, big_endian> >
- {
- public:
- Target_selector_mips_nacl()
- : Target_selector_nacl<Target_selector_mips<size, big_endian>,
- Target_mips_nacl<size, big_endian> >(
- // NaCl currently supports only MIPS32 little-endian.
- "mipsel", "elf32-tradlittlemips-nacl", "elf32-tradlittlemips-nacl")
- { }
- };
- Target_selector_mips_nacl<32, true> target_selector_mips32;
- Target_selector_mips_nacl<32, false> target_selector_mips32el;
- Target_selector_mips_nacl<64, true> target_selector_mips64;
- Target_selector_mips_nacl<64, false> target_selector_mips64el;
- } // End anonymous namespace.
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