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- // powerpc.cc -- powerpc target support for gold.
- // Copyright (C) 2008-2022 Free Software Foundation, Inc.
- // Written by David S. Miller <davem@davemloft.net>
- // and David Edelsohn <edelsohn@gnu.org>
- // 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 <set>
- #include <algorithm>
- #include "elfcpp.h"
- #include "dwarf.h"
- #include "parameters.h"
- #include "reloc.h"
- #include "powerpc.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"
- namespace
- {
- using namespace gold;
- template<int size, bool big_endian>
- class Output_data_plt_powerpc;
- template<int size, bool big_endian>
- class Output_data_brlt_powerpc;
- template<int size, bool big_endian>
- class Output_data_got_powerpc;
- template<int size, bool big_endian>
- class Output_data_glink;
- template<int size, bool big_endian>
- class Stub_table;
- template<int size, bool big_endian>
- class Output_data_save_res;
- template<int size, bool big_endian>
- class Target_powerpc;
- struct Stub_table_owner
- {
- Stub_table_owner()
- : output_section(NULL), owner(NULL)
- { }
- Output_section* output_section;
- const Output_section::Input_section* owner;
- };
- template<int size>
- inline bool is_branch_reloc(unsigned int);
- template<int size>
- inline bool is_plt16_reloc(unsigned int);
- // Counter incremented on every Powerpc_relobj constructed.
- static uint32_t object_id = 0;
- template<int size, bool big_endian>
- class Powerpc_relobj : public Sized_relobj_file<size, big_endian>
- {
- public:
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- typedef Unordered_set<Section_id, Section_id_hash> Section_refs;
- typedef Unordered_map<Address, Section_refs> Access_from;
- Powerpc_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),
- uniq_(object_id++), special_(0), relatoc_(0), toc_(0),
- has_small_toc_reloc_(false), opd_valid_(false),
- e_flags_(ehdr.get_e_flags()), no_toc_opt_(), opd_ent_(),
- access_from_map_(), has14_(), stub_table_index_(), st_other_(),
- attributes_section_data_(NULL)
- {
- this->set_abiversion(0);
- }
- ~Powerpc_relobj()
- { delete this->attributes_section_data_; }
- // Read the symbols then set up st_other vector.
- void
- do_read_symbols(Read_symbols_data*);
- // Arrange to always relocate .toc first.
- virtual void
- do_relocate_sections(
- const Symbol_table* symtab, const Layout* layout,
- const unsigned char* pshdrs, Output_file* of,
- typename Sized_relobj_file<size, big_endian>::Views* pviews);
- // The .toc section index.
- unsigned int
- toc_shndx() const
- {
- return this->toc_;
- }
- // Mark .toc entry at OFF as not optimizable.
- void
- set_no_toc_opt(Address off)
- {
- if (this->no_toc_opt_.empty())
- this->no_toc_opt_.resize(this->section_size(this->toc_shndx())
- / (size / 8));
- off /= size / 8;
- if (off < this->no_toc_opt_.size())
- this->no_toc_opt_[off] = true;
- }
- // Mark the entire .toc as not optimizable.
- void
- set_no_toc_opt()
- {
- this->no_toc_opt_.resize(1);
- this->no_toc_opt_[0] = true;
- }
- // Return true if code using the .toc entry at OFF should not be edited.
- bool
- no_toc_opt(Address off) const
- {
- if (this->no_toc_opt_.empty())
- return false;
- off /= size / 8;
- if (off >= this->no_toc_opt_.size())
- return true;
- return this->no_toc_opt_[off];
- }
- // The .got2 section shndx.
- unsigned int
- got2_shndx() const
- {
- if (size == 32)
- return this->special_;
- else
- return 0;
- }
- // The .opd section shndx.
- unsigned int
- opd_shndx() const
- {
- if (size == 32)
- return 0;
- else
- return this->special_;
- }
- // Init OPD entry arrays.
- void
- init_opd(size_t opd_size)
- {
- size_t count = this->opd_ent_ndx(opd_size);
- this->opd_ent_.resize(count);
- }
- // Return section and offset of function entry for .opd + R_OFF.
- unsigned int
- get_opd_ent(Address r_off, Address* value = NULL) const
- {
- size_t ndx = this->opd_ent_ndx(r_off);
- gold_assert(ndx < this->opd_ent_.size());
- gold_assert(this->opd_ent_[ndx].shndx != 0);
- if (value != NULL)
- *value = this->opd_ent_[ndx].off;
- return this->opd_ent_[ndx].shndx;
- }
- // Set section and offset of function entry for .opd + R_OFF.
- void
- set_opd_ent(Address r_off, unsigned int shndx, Address value)
- {
- size_t ndx = this->opd_ent_ndx(r_off);
- gold_assert(ndx < this->opd_ent_.size());
- this->opd_ent_[ndx].shndx = shndx;
- this->opd_ent_[ndx].off = value;
- }
- // Return discard flag for .opd + R_OFF.
- bool
- get_opd_discard(Address r_off) const
- {
- size_t ndx = this->opd_ent_ndx(r_off);
- gold_assert(ndx < this->opd_ent_.size());
- return this->opd_ent_[ndx].discard;
- }
- // Set discard flag for .opd + R_OFF.
- void
- set_opd_discard(Address r_off)
- {
- size_t ndx = this->opd_ent_ndx(r_off);
- gold_assert(ndx < this->opd_ent_.size());
- this->opd_ent_[ndx].discard = true;
- }
- bool
- opd_valid() const
- { return this->opd_valid_; }
- void
- set_opd_valid()
- { this->opd_valid_ = true; }
- // Examine .rela.opd to build info about function entry points.
- void
- scan_opd_relocs(size_t reloc_count,
- const unsigned char* prelocs,
- const unsigned char* plocal_syms);
- // Returns true if a code sequence loading a TOC entry can be
- // converted into code calculating a TOC pointer relative offset.
- bool
- make_toc_relative(Target_powerpc<size, big_endian>* target,
- Address* value);
- bool
- make_got_relative(Target_powerpc<size, big_endian>* target,
- const Symbol_value<size>* psymval,
- Address addend,
- Address* value);
- // Perform the Sized_relobj_file method, then set up opd info from
- // .opd relocs.
- void
- do_read_relocs(Read_relocs_data*);
- bool
- do_find_special_sections(Read_symbols_data* sd);
- // Adjust this local symbol value. Return false if the symbol
- // should be discarded from the output file.
- bool
- do_adjust_local_symbol(Symbol_value<size>* lv) const
- {
- if (size == 64 && this->opd_shndx() != 0)
- {
- bool is_ordinary;
- if (lv->input_shndx(&is_ordinary) != this->opd_shndx())
- return true;
- if (this->get_opd_discard(lv->input_value()))
- return false;
- }
- return true;
- }
- Access_from*
- access_from_map()
- { return &this->access_from_map_; }
- // Add a reference from SRC_OBJ, SRC_INDX to this object's .opd
- // section at DST_OFF.
- void
- add_reference(Relobj* src_obj,
- unsigned int src_indx,
- typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
- {
- Section_id src_id(src_obj, src_indx);
- this->access_from_map_[dst_off].insert(src_id);
- }
- // Add a reference to the code section specified by the .opd entry
- // at DST_OFF
- void
- add_gc_mark(typename elfcpp::Elf_types<size>::Elf_Addr dst_off)
- {
- size_t ndx = this->opd_ent_ndx(dst_off);
- if (ndx >= this->opd_ent_.size())
- this->opd_ent_.resize(ndx + 1);
- this->opd_ent_[ndx].gc_mark = true;
- }
- void
- process_gc_mark(Symbol_table* symtab)
- {
- for (size_t i = 0; i < this->opd_ent_.size(); i++)
- if (this->opd_ent_[i].gc_mark)
- {
- unsigned int shndx = this->opd_ent_[i].shndx;
- symtab->gc()->worklist().push_back(Section_id(this, shndx));
- }
- }
- void
- set_has_small_toc_reloc()
- { has_small_toc_reloc_ = true; }
- bool
- has_small_toc_reloc() const
- { return has_small_toc_reloc_; }
- void
- set_has_14bit_branch(unsigned int shndx)
- {
- if (shndx >= this->has14_.size())
- this->has14_.resize(shndx + 1);
- this->has14_[shndx] = true;
- }
- bool
- has_14bit_branch(unsigned int shndx) const
- { return shndx < this->has14_.size() && this->has14_[shndx]; }
- void
- set_stub_table(unsigned int shndx, unsigned int stub_index)
- {
- if (shndx >= this->stub_table_index_.size())
- this->stub_table_index_.resize(shndx + 1, -1);
- this->stub_table_index_[shndx] = stub_index;
- }
- Stub_table<size, big_endian>*
- stub_table(unsigned int shndx)
- {
- if (shndx < this->stub_table_index_.size())
- {
- Target_powerpc<size, big_endian>* target
- = static_cast<Target_powerpc<size, big_endian>*>(
- parameters->sized_target<size, big_endian>());
- unsigned int indx = this->stub_table_index_[shndx];
- if (indx < target->stub_tables().size())
- return target->stub_tables()[indx];
- }
- return NULL;
- }
- void
- clear_stub_table()
- {
- this->stub_table_index_.clear();
- }
- uint32_t
- uniq() const
- { return this->uniq_; }
- int
- abiversion() const
- { return this->e_flags_ & elfcpp::EF_PPC64_ABI; }
- // Set ABI version for input and output
- void
- set_abiversion(int ver);
- unsigned int
- st_other (unsigned int symndx) const
- {
- return this->st_other_[symndx];
- }
- unsigned int
- ppc64_local_entry_offset(const Symbol* sym) const
- { return elfcpp::ppc64_decode_local_entry(sym->nonvis() >> 3); }
- unsigned int
- ppc64_local_entry_offset(unsigned int symndx) const
- { return elfcpp::ppc64_decode_local_entry(this->st_other_[symndx] >> 5); }
- bool
- ppc64_needs_toc(const Symbol* sym) const
- { return sym->nonvis() > 1 << 3; }
- bool
- ppc64_needs_toc(unsigned int symndx) const
- { return this->st_other_[symndx] > 1 << 5; }
- // The contents of the .gnu.attributes section if there is one.
- const Attributes_section_data*
- attributes_section_data() const
- { return this->attributes_section_data_; }
- private:
- struct Opd_ent
- {
- unsigned int shndx;
- bool discard : 1;
- bool gc_mark : 1;
- Address off;
- };
- // Return index into opd_ent_ array for .opd entry at OFF.
- // .opd entries are 24 bytes long, but they can be spaced 16 bytes
- // apart when the language doesn't use the last 8-byte word, the
- // environment pointer. Thus dividing the entry section offset by
- // 16 will give an index into opd_ent_ that works for either layout
- // of .opd. (It leaves some elements of the vector unused when .opd
- // entries are spaced 24 bytes apart, but we don't know the spacing
- // until relocations are processed, and in any case it is possible
- // for an object to have some entries spaced 16 bytes apart and
- // others 24 bytes apart.)
- size_t
- opd_ent_ndx(size_t off) const
- { return off >> 4;}
- // Per object unique identifier
- uint32_t uniq_;
- // For 32-bit the .got2 section shdnx, for 64-bit the .opd section shndx.
- unsigned int special_;
- // For 64-bit the .rela.toc and .toc section shdnx.
- unsigned int relatoc_;
- unsigned int toc_;
- // For 64-bit, whether this object uses small model relocs to access
- // the toc.
- bool has_small_toc_reloc_;
- // Set at the start of gc_process_relocs, when we know opd_ent_
- // vector is valid. The flag could be made atomic and set in
- // do_read_relocs with memory_order_release and then tested with
- // memory_order_acquire, potentially resulting in fewer entries in
- // access_from_map_.
- bool opd_valid_;
- // Header e_flags
- elfcpp::Elf_Word e_flags_;
- // For 64-bit, an array with one entry per 64-bit word in the .toc
- // section, set if accesses using that word cannot be optimised.
- std::vector<bool> no_toc_opt_;
- // The first 8-byte word of an OPD entry gives the address of the
- // entry point of the function. Relocatable object files have a
- // relocation on this word. The following vector records the
- // section and offset specified by these relocations.
- std::vector<Opd_ent> opd_ent_;
- // References made to this object's .opd section when running
- // gc_process_relocs for another object, before the opd_ent_ vector
- // is valid for this object.
- Access_from access_from_map_;
- // Whether input section has a 14-bit branch reloc.
- std::vector<bool> has14_;
- // The stub table to use for a given input section.
- std::vector<unsigned int> stub_table_index_;
- // ELF st_other field for local symbols.
- std::vector<unsigned char> st_other_;
- // Object attributes if there is a .gnu.attributes section.
- Attributes_section_data* attributes_section_data_;
- };
- template<int size, bool big_endian>
- class Powerpc_dynobj : public Sized_dynobj<size, big_endian>
- {
- public:
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- Powerpc_dynobj(const std::string& name, Input_file* input_file, off_t offset,
- const typename elfcpp::Ehdr<size, big_endian>& ehdr)
- : Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr),
- opd_shndx_(0), e_flags_(ehdr.get_e_flags()), opd_ent_(),
- attributes_section_data_(NULL)
- {
- this->set_abiversion(0);
- }
- ~Powerpc_dynobj()
- { delete this->attributes_section_data_; }
- // Call Sized_dynobj::do_read_symbols to read the symbols then
- // read .opd from a dynamic object, filling in opd_ent_ vector,
- void
- do_read_symbols(Read_symbols_data*);
- // The .opd section shndx.
- unsigned int
- opd_shndx() const
- {
- return this->opd_shndx_;
- }
- // The .opd section address.
- Address
- opd_address() const
- {
- return this->opd_address_;
- }
- // Init OPD entry arrays.
- void
- init_opd(size_t opd_size)
- {
- size_t count = this->opd_ent_ndx(opd_size);
- this->opd_ent_.resize(count);
- }
- // Return section and offset of function entry for .opd + R_OFF.
- unsigned int
- get_opd_ent(Address r_off, Address* value = NULL) const
- {
- size_t ndx = this->opd_ent_ndx(r_off);
- gold_assert(ndx < this->opd_ent_.size());
- gold_assert(this->opd_ent_[ndx].shndx != 0);
- if (value != NULL)
- *value = this->opd_ent_[ndx].off;
- return this->opd_ent_[ndx].shndx;
- }
- // Set section and offset of function entry for .opd + R_OFF.
- void
- set_opd_ent(Address r_off, unsigned int shndx, Address value)
- {
- size_t ndx = this->opd_ent_ndx(r_off);
- gold_assert(ndx < this->opd_ent_.size());
- this->opd_ent_[ndx].shndx = shndx;
- this->opd_ent_[ndx].off = value;
- }
- int
- abiversion() const
- { return this->e_flags_ & elfcpp::EF_PPC64_ABI; }
- // Set ABI version for input and output.
- void
- set_abiversion(int ver);
- // The contents of the .gnu.attributes section if there is one.
- const Attributes_section_data*
- attributes_section_data() const
- { return this->attributes_section_data_; }
- private:
- // Used to specify extent of executable sections.
- struct Sec_info
- {
- Sec_info(Address start_, Address len_, unsigned int shndx_)
- : start(start_), len(len_), shndx(shndx_)
- { }
- bool
- operator<(const Sec_info& that) const
- { return this->start < that.start; }
- Address start;
- Address len;
- unsigned int shndx;
- };
- struct Opd_ent
- {
- unsigned int shndx;
- Address off;
- };
- // Return index into opd_ent_ array for .opd entry at OFF.
- size_t
- opd_ent_ndx(size_t off) const
- { return off >> 4;}
- // For 64-bit the .opd section shndx and address.
- unsigned int opd_shndx_;
- Address opd_address_;
- // Header e_flags
- elfcpp::Elf_Word e_flags_;
- // The first 8-byte word of an OPD entry gives the address of the
- // entry point of the function. Records the section and offset
- // corresponding to the address. Note that in dynamic objects,
- // offset is *not* relative to the section.
- std::vector<Opd_ent> opd_ent_;
- // Object attributes if there is a .gnu.attributes section.
- Attributes_section_data* attributes_section_data_;
- };
- // Powerpc_copy_relocs class. Needed to peek at dynamic relocs the
- // base class will emit.
- template<int sh_type, int size, bool big_endian>
- class Powerpc_copy_relocs : public Copy_relocs<sh_type, size, big_endian>
- {
- public:
- Powerpc_copy_relocs()
- : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_POWERPC_COPY)
- { }
- // Emit any saved relocations which turn out to be needed. This is
- // called after all the relocs have been scanned.
- void
- emit(Output_data_reloc<sh_type, true, size, big_endian>*);
- };
- // The types of GOT entries needed for this platform.
- // These values are exposed to the ABI in an incremental link, but
- // powerpc does not support incremental linking as yet.
- enum Got_type
- {
- GOT_TYPE_STANDARD = 0,
- GOT_TYPE_TLSGD = 1, // double entry for @got@tlsgd
- GOT_TYPE_DTPREL = 2, // entry for @got@dtprel
- GOT_TYPE_TPREL = 3, // entry for @got@tprel
- GOT_TYPE_SMALL = 4,
- GOT_TYPE_SMALL_TLSGD = 5,
- GOT_TYPE_SMALL_DTPREL = 6,
- GOT_TYPE_SMALL_TPREL = 7
- };
- template<int size, bool big_endian>
- class Target_powerpc : public Sized_target<size, big_endian>
- {
- public:
- typedef
- Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- typedef typename elfcpp::Elf_types<size>::Elf_Swxword Signed_address;
- typedef Unordered_set<Symbol_location, Symbol_location_hash> Tocsave_loc;
- static const Address invalid_address = static_cast<Address>(0) - 1;
- // Offset of tp and dtp pointers from start of TLS block.
- static const Address tp_offset = 0x7000;
- static const Address dtp_offset = 0x8000;
- Target_powerpc()
- : Sized_target<size, big_endian>(&powerpc_info),
- got_(NULL), biggot_(NULL), plt_(NULL), iplt_(NULL), lplt_(NULL),
- brlt_section_(NULL), glink_(NULL), rela_dyn_(NULL), copy_relocs_(),
- tlsld_got_offset_(-1U),
- stub_tables_(), branch_lookup_table_(), branch_info_(), tocsave_loc_(),
- power10_relocs_(false), plt_thread_safe_(false), plt_localentry0_(false),
- plt_localentry0_init_(false), has_localentry0_(false),
- has_tls_get_addr_opt_(false), no_tprel_opt_(false),
- relax_failed_(false), relax_fail_count_(0),
- stub_group_size_(0), savres_section_(0),
- tls_get_addr_(NULL), tls_get_addr_opt_(NULL),
- attributes_section_data_(NULL),
- last_fp_(NULL), last_ld_(NULL), last_vec_(NULL), last_struct_(NULL)
- {
- }
- // 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);
- // Map input .toc section to output .got section.
- const char*
- do_output_section_name(const Relobj*, const char* name, size_t* plen) const
- {
- if (size == 64 && strcmp(name, ".toc") == 0)
- {
- *plen = 4;
- return ".got";
- }
- return NULL;
- }
- // Provide linker defined save/restore functions.
- void
- define_save_restore_funcs(Layout*, Symbol_table*);
- // No stubs unless a final link.
- bool
- do_may_relax() const
- { return !parameters->options().relocatable(); }
- bool
- do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*);
- void
- do_plt_fde_location(const Output_data*, unsigned char*,
- uint64_t*, off_t*) const;
- // Stash info about branches, for stub generation.
- void
- push_branch(Powerpc_relobj<size, big_endian>* ppc_object,
- unsigned int data_shndx, Address r_offset,
- unsigned int r_type, unsigned int r_sym, Address addend)
- {
- Branch_info info(ppc_object, data_shndx, r_offset, r_type, r_sym, addend);
- this->branch_info_.push_back(info);
- if (r_type == elfcpp::R_POWERPC_REL14
- || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
- || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
- ppc_object->set_has_14bit_branch(data_shndx);
- }
- // Return whether the last branch is a plt call, and if so, mark the
- // branch as having an R_PPC64_TOCSAVE.
- bool
- mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object,
- unsigned int data_shndx, Address r_offset, Symbol_table* symtab)
- {
- return (size == 64
- && !this->branch_info_.empty()
- && this->branch_info_.back().mark_pltcall(ppc_object, data_shndx,
- r_offset, this, symtab));
- }
- // Say the given location, that of a nop in a function prologue with
- // an R_PPC64_TOCSAVE reloc, will be used to save r2.
- // R_PPC64_TOCSAVE relocs on nops following calls point at this nop.
- void
- add_tocsave(Powerpc_relobj<size, big_endian>* ppc_object,
- unsigned int shndx, Address offset)
- {
- Symbol_location loc;
- loc.object = ppc_object;
- loc.shndx = shndx;
- loc.offset = offset;
- this->tocsave_loc_.insert(loc);
- }
- // Accessor
- const Tocsave_loc*
- tocsave_loc() const
- {
- return &this->tocsave_loc_;
- }
- void
- do_define_standard_symbols(Symbol_table*, Layout*);
- // Finalize the sections.
- void
- do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
- // Return the value to use for a dynamic which requires special
- // treatment.
- uint64_t
- do_dynsym_value(const Symbol*) const;
- // Return the PLT address to use for a local symbol.
- uint64_t
- do_plt_address_for_local(const Relobj*, unsigned int) const;
- // Return the PLT address to use for a global symbol.
- uint64_t
- do_plt_address_for_global(const Symbol*) const;
- // Return the offset to use for the GOT_INDX'th got entry which is
- // for a local tls symbol specified by OBJECT, SYMNDX.
- int64_t
- do_tls_offset_for_local(const Relobj* object,
- unsigned int symndx,
- Output_data_got_base* got,
- unsigned int got_indx,
- uint64_t addend) const;
- // Return the offset to use for the GOT_INDX'th got entry which is
- // for global tls symbol GSYM.
- int64_t
- do_tls_offset_for_global(Symbol* gsym,
- Output_data_got_base* got, unsigned int got_indx,
- uint64_t addend) const;
- void
- do_function_location(Symbol_location*) const;
- bool
- do_can_check_for_function_pointers() const
- { return true; }
- // Adjust -fsplit-stack code which calls non-split-stack code.
- void
- do_calls_non_split(Relobj* object, unsigned int shndx,
- section_offset_type fnoffset, section_size_type fnsize,
- const unsigned char* prelocs, size_t reloc_count,
- unsigned char* view, section_size_type view_size,
- std::string* from, std::string* to) const;
- // 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,
- 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*,
- Address view_address,
- section_size_type,
- unsigned char* reloc_view,
- section_size_type reloc_view_size);
- // Return whether SYM is defined by the ABI.
- bool
- do_is_defined_by_abi(const Symbol* sym) const
- {
- return strcmp(sym->name(), "__tls_get_addr") == 0;
- }
- // Return the size of the GOT section, for incremental linking
- section_size_type
- got_size() const
- {
- gold_assert(this->got_ != NULL);
- return this->got_->data_size() + (this->biggot_
- ? this->biggot_->data_size() : 0);
- }
- // Get the PLT section.
- const Output_data_plt_powerpc<size, big_endian>*
- plt_section() const
- {
- gold_assert(this->plt_ != NULL);
- return this->plt_;
- }
- // Get the IPLT section.
- const Output_data_plt_powerpc<size, big_endian>*
- iplt_section() const
- {
- gold_assert(this->iplt_ != NULL);
- return this->iplt_;
- }
- // Get the LPLT section.
- const Output_data_plt_powerpc<size, big_endian>*
- lplt_section() const
- {
- return this->lplt_;
- }
- // Return the plt offset and section for the given global sym.
- Address
- plt_off(const Symbol* gsym,
- const Output_data_plt_powerpc<size, big_endian>** sec) const
- {
- if (gsym->type() == elfcpp::STT_GNU_IFUNC
- && gsym->can_use_relative_reloc(false))
- *sec = this->iplt_section();
- else if (!parameters->doing_static_link())
- *sec = this->plt_section();
- else
- *sec = this->lplt_section();
- return gsym->plt_offset();
- }
- // Return the plt offset and section for the given local sym.
- Address
- plt_off(const Sized_relobj_file<size, big_endian>* relobj,
- unsigned int local_sym_index,
- const Output_data_plt_powerpc<size, big_endian>** sec) const
- {
- const Symbol_value<size>* lsym = relobj->local_symbol(local_sym_index);
- if (lsym->is_ifunc_symbol())
- *sec = this->iplt_section();
- else
- *sec = this->lplt_section();
- return relobj->local_plt_offset(local_sym_index);
- }
- // Get the .glink section.
- const Output_data_glink<size, big_endian>*
- glink_section() const
- {
- gold_assert(this->glink_ != NULL);
- return this->glink_;
- }
- Output_data_glink<size, big_endian>*
- glink_section()
- {
- gold_assert(this->glink_ != NULL);
- return this->glink_;
- }
- bool has_glink() const
- { return this->glink_ != NULL; }
- // Get the GOT section.
- const Output_data_got_powerpc<size, big_endian>*
- got_section(Got_type got_type) const
- {
- gold_assert(this->got_ != NULL);
- if (size == 32 || (got_type & GOT_TYPE_SMALL))
- return this->got_;
- gold_assert(this->biggot_ != NULL);
- return this->biggot_;
- }
- // Get the GOT section, creating it if necessary.
- Output_data_got_powerpc<size, big_endian>*
- got_section(Symbol_table*, Layout*, Got_type);
- // The toc/got pointer reg will be set to this value.
- Address
- toc_pointer() const
- {
- return this->got_->address() + this->got_->g_o_t();
- }
- // Offset of base used to access the GOT/TOC relative to the GOT section.
- Address
- got_base_offset(Got_type got_type) const
- {
- if (size == 32 || (got_type & GOT_TYPE_SMALL))
- return this->got_->g_o_t();
- return this->toc_pointer() - this->biggot_->address();
- }
- Object*
- do_make_elf_object(const std::string&, Input_file*, off_t,
- const elfcpp::Ehdr<size, big_endian>&);
- // Return the number of entries in the GOT.
- unsigned int
- got_entry_count() const
- {
- if (this->got_ == NULL)
- return 0;
- return this->got_size() / (size / 8);
- }
- // Return the number of entries in the PLT.
- unsigned int
- plt_entry_count() const;
- // Return the offset of the first non-reserved PLT entry.
- unsigned int
- first_plt_entry_offset() const
- {
- if (size == 32)
- return 0;
- if (this->abiversion() >= 2)
- return 16;
- return 24;
- }
- // Return the size of each PLT entry.
- unsigned int
- plt_entry_size() const
- {
- if (size == 32)
- return 4;
- if (this->abiversion() >= 2)
- return 8;
- return 24;
- }
- Output_data_save_res<size, big_endian>*
- savres_section() const
- {
- return this->savres_section_;
- }
- // Add any special sections for this symbol to the gc work list.
- // For powerpc64, this adds the code section of a function
- // descriptor.
- void
- do_gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const;
- // Handle target specific gc actions when adding a gc reference from
- // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
- // and DST_OFF. For powerpc64, this adds a referenc to the code
- // section of a function descriptor.
- void
- do_gc_add_reference(Symbol_table* symtab,
- Relobj* src_obj,
- unsigned int src_shndx,
- Relobj* dst_obj,
- unsigned int dst_shndx,
- Address dst_off) const;
- typedef std::vector<Stub_table<size, big_endian>*> Stub_tables;
- const Stub_tables&
- stub_tables() const
- { return this->stub_tables_; }
- const Output_data_brlt_powerpc<size, big_endian>*
- brlt_section() const
- { return this->brlt_section_; }
- void
- add_branch_lookup_table(Address to)
- {
- unsigned int off = this->branch_lookup_table_.size() * (size / 8);
- this->branch_lookup_table_.insert(std::make_pair(to, off));
- }
- Address
- find_branch_lookup_table(Address to)
- {
- typename Branch_lookup_table::const_iterator p
- = this->branch_lookup_table_.find(to);
- return p == this->branch_lookup_table_.end() ? invalid_address : p->second;
- }
- void
- write_branch_lookup_table(unsigned char *oview)
- {
- for (typename Branch_lookup_table::const_iterator p
- = this->branch_lookup_table_.begin();
- p != this->branch_lookup_table_.end();
- ++p)
- {
- elfcpp::Swap<size, big_endian>::writeval(oview + p->second, p->first);
- }
- }
- // Wrapper used after relax to define a local symbol in output data,
- // from the end if value < 0.
- void
- define_local(Symbol_table* symtab, const char* name,
- Output_data* od, Address value, unsigned int symsize)
- {
- Symbol* sym
- = symtab->define_in_output_data(name, NULL, Symbol_table::PREDEFINED,
- od, value, symsize, elfcpp::STT_NOTYPE,
- elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, 0,
- static_cast<Signed_address>(value) < 0,
- false);
- // We are creating this symbol late, so need to fix up things
- // done early in Layout::finalize.
- sym->set_dynsym_index(-1U);
- }
- void
- set_power10_relocs()
- {
- this->power10_relocs_ = true;
- }
- bool
- power10_stubs() const
- {
- return (this->power10_relocs_
- && (parameters->options().power10_stubs_enum()
- != General_options::POWER10_STUBS_NO));
- }
- bool
- power10_stubs_auto() const
- {
- return (parameters->options().power10_stubs_enum()
- == General_options::POWER10_STUBS_AUTO);
- }
- bool
- plt_thread_safe() const
- { return this->plt_thread_safe_; }
- bool
- plt_localentry0() const
- { return this->plt_localentry0_; }
- bool
- has_localentry0() const
- { return this->has_localentry0_; }
- void
- set_has_localentry0()
- {
- this->has_localentry0_ = true;
- }
- bool
- is_elfv2_localentry0(const Symbol* gsym) const
- {
- return (size == 64
- && this->abiversion() >= 2
- && this->plt_localentry0()
- && gsym->type() == elfcpp::STT_FUNC
- && gsym->is_defined()
- && gsym->nonvis() >> 3 == 0
- && !gsym->non_zero_localentry());
- }
- bool
- is_elfv2_localentry0(const Sized_relobj_file<size, big_endian>* object,
- unsigned int r_sym) const
- {
- const Powerpc_relobj<size, big_endian>* ppc_object
- = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
- if (size == 64
- && this->abiversion() >= 2
- && this->plt_localentry0()
- && ppc_object->st_other(r_sym) >> 5 == 0)
- {
- const Symbol_value<size>* psymval = object->local_symbol(r_sym);
- bool is_ordinary;
- if (!psymval->is_ifunc_symbol()
- && psymval->input_shndx(&is_ordinary) != elfcpp::SHN_UNDEF
- && is_ordinary)
- return true;
- }
- return false;
- }
- bool
- tprel_opt() const
- { return !this->no_tprel_opt_ && parameters->options().tls_optimize(); }
- void
- set_no_tprel_opt()
- { this->no_tprel_opt_ = true; }
- // Remember any symbols seen with non-zero localentry, even those
- // not providing a definition
- bool
- resolve(Symbol* to, const elfcpp::Sym<size, big_endian>& sym, Object*,
- const char*)
- {
- if (size == 64)
- {
- unsigned char st_other = sym.get_st_other();
- if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0)
- to->set_non_zero_localentry();
- }
- // We haven't resolved anything, continue normal processing.
- return false;
- }
- int
- abiversion() const
- { return this->processor_specific_flags() & elfcpp::EF_PPC64_ABI; }
- void
- set_abiversion(int ver)
- {
- elfcpp::Elf_Word flags = this->processor_specific_flags();
- flags &= ~elfcpp::EF_PPC64_ABI;
- flags |= ver & elfcpp::EF_PPC64_ABI;
- this->set_processor_specific_flags(flags);
- }
- Symbol*
- tls_get_addr_opt() const
- { return this->tls_get_addr_opt_; }
- Symbol*
- tls_get_addr() const
- { return this->tls_get_addr_; }
- // If optimizing __tls_get_addr calls, whether this is the
- // "__tls_get_addr" symbol.
- bool
- is_tls_get_addr_opt(const Symbol* gsym) const
- {
- return this->tls_get_addr_opt_ && (gsym == this->tls_get_addr_
- || gsym == this->tls_get_addr_opt_);
- }
- bool
- replace_tls_get_addr(const Symbol* gsym) const
- { return this->tls_get_addr_opt_ && gsym == this->tls_get_addr_; }
- void
- set_has_tls_get_addr_opt()
- { this->has_tls_get_addr_opt_ = true; }
- // Offset to toc save stack slot
- int
- stk_toc() const
- { return this->abiversion() < 2 ? 40 : 24; }
- // Offset to linker save stack slot. ELFv2 doesn't have a linker word,
- // so use the CR save slot. Used only by __tls_get_addr call stub,
- // relying on __tls_get_addr not saving CR itself.
- int
- stk_linker() const
- { return this->abiversion() < 2 ? 32 : 8; }
- // Merge object attributes from input object with those in the output.
- void
- merge_object_attributes(const Object*, const Attributes_section_data*);
- bool
- symval_for_branch(const Symbol_table* symtab,
- const Sized_symbol<size>* gsym,
- Powerpc_relobj<size, big_endian>* object,
- Address *value, unsigned int *dest_shndx);
- private:
- class Track_tls
- {
- public:
- enum Tls_get_addr
- {
- NOT_EXPECTED = 0,
- EXPECTED = 1,
- SKIP = 2,
- NORMAL = 3
- };
- Track_tls()
- : tls_get_addr_state_(NOT_EXPECTED),
- relinfo_(NULL), relnum_(0), r_offset_(0)
- { }
- ~Track_tls()
- {
- if (this->tls_get_addr_state_ != NOT_EXPECTED)
- this->missing();
- }
- void
- missing(void)
- {
- if (this->relinfo_ != NULL)
- gold_error_at_location(this->relinfo_, this->relnum_, this->r_offset_,
- _("missing expected __tls_get_addr call"));
- }
- void
- expect_tls_get_addr_call(
- const Relocate_info<size, big_endian>* relinfo,
- size_t relnum,
- Address r_offset)
- {
- this->tls_get_addr_state_ = EXPECTED;
- this->relinfo_ = relinfo;
- this->relnum_ = relnum;
- this->r_offset_ = r_offset;
- }
- void
- expect_tls_get_addr_call()
- { this->tls_get_addr_state_ = EXPECTED; }
- void
- skip_next_tls_get_addr_call()
- {this->tls_get_addr_state_ = SKIP; }
- Tls_get_addr
- maybe_skip_tls_get_addr_call(Target_powerpc<size, big_endian>* target,
- unsigned int r_type, const Symbol* gsym)
- {
- bool is_tls_call
- = ((r_type == elfcpp::R_POWERPC_REL24
- || (size == 64 && r_type == elfcpp::R_PPC64_REL24_NOTOC)
- || r_type == elfcpp::R_PPC64_REL24_P9NOTOC
- || r_type == elfcpp::R_PPC_PLTREL24
- || is_plt16_reloc<size>(r_type)
- || r_type == elfcpp::R_PPC64_PLT_PCREL34
- || r_type == elfcpp::R_PPC64_PLT_PCREL34_NOTOC
- || r_type == elfcpp::R_POWERPC_PLTSEQ
- || r_type == elfcpp::R_POWERPC_PLTCALL
- || r_type == elfcpp::R_PPC64_PLTSEQ_NOTOC
- || r_type == elfcpp::R_PPC64_PLTCALL_NOTOC)
- && gsym != NULL
- && (gsym == target->tls_get_addr()
- || gsym == target->tls_get_addr_opt()));
- Tls_get_addr last_tls = this->tls_get_addr_state_;
- this->tls_get_addr_state_ = NOT_EXPECTED;
- if (is_tls_call && last_tls != EXPECTED)
- return last_tls;
- else if (!is_tls_call && last_tls != NOT_EXPECTED)
- {
- this->missing();
- return EXPECTED;
- }
- return NORMAL;
- }
- private:
- // What we're up to regarding calls to __tls_get_addr.
- // On powerpc, the branch and link insn making a call to
- // __tls_get_addr is marked with a relocation, R_PPC64_TLSGD,
- // R_PPC64_TLSLD, R_PPC_TLSGD or R_PPC_TLSLD, in addition to the
- // usual R_POWERPC_REL24 or R_PPC_PLTREL24 relocation on a call.
- // The marker relocation always comes first, and has the same
- // symbol as the reloc on the insn setting up the __tls_get_addr
- // argument. This ties the arg setup insn with the call insn,
- // allowing ld to safely optimize away the call. We check that
- // every call to __tls_get_addr has a marker relocation, and that
- // every marker relocation is on a call to __tls_get_addr.
- Tls_get_addr tls_get_addr_state_;
- // Info about the last reloc for error message.
- const Relocate_info<size, big_endian>* relinfo_;
- size_t relnum_;
- Address r_offset_;
- };
- // The class which scans relocations.
- class Scan : protected Track_tls
- {
- public:
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- Scan()
- : Track_tls(), issued_non_pic_error_(false)
- { }
- static inline int
- get_reference_flags(unsigned int r_type, const Target_powerpc* target);
- inline void
- local(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym,
- bool is_discarded);
- inline void
- global(Symbol_table* symtab, Layout* layout, Target_powerpc* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
- Symbol* gsym);
- inline bool
- local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
- Target_powerpc* ,
- Sized_relobj_file<size, big_endian>* relobj,
- unsigned int ,
- Output_section* ,
- const elfcpp::Rela<size, big_endian>& ,
- unsigned int r_type,
- const elfcpp::Sym<size, big_endian>&)
- {
- // PowerPC64 .opd is not folded, so any identical function text
- // may be folded and we'll still keep function addresses distinct.
- // That means no reloc is of concern here.
- if (size == 64)
- {
- Powerpc_relobj<size, big_endian>* ppcobj = static_cast
- <Powerpc_relobj<size, big_endian>*>(relobj);
- if (ppcobj->abiversion() == 1)
- return false;
- }
- // For 32-bit and ELFv2, conservatively assume anything but calls to
- // function code might be taking the address of the function.
- return !is_branch_reloc<size>(r_type);
- }
- inline bool
- global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
- Target_powerpc* ,
- Sized_relobj_file<size, big_endian>* relobj,
- unsigned int ,
- Output_section* ,
- const elfcpp::Rela<size, big_endian>& ,
- unsigned int r_type,
- Symbol*)
- {
- // As above.
- if (size == 64)
- {
- Powerpc_relobj<size, big_endian>* ppcobj = static_cast
- <Powerpc_relobj<size, big_endian>*>(relobj);
- if (ppcobj->abiversion() == 1)
- return false;
- }
- return !is_branch_reloc<size>(r_type);
- }
- static bool
- reloc_needs_plt_for_ifunc(Target_powerpc<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int r_type, bool report_err);
- 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*);
- static void
- generate_tls_call(Symbol_table* symtab, Layout* layout,
- Target_powerpc* target);
- void
- check_non_pic(Relobj*, unsigned int r_type);
- // Whether we have issued an error about a non-PIC compilation.
- bool issued_non_pic_error_;
- };
- // The class which implements relocation.
- class Relocate : protected Track_tls
- {
- public:
- // Use 'at' branch hints when true, 'y' when false.
- // FIXME maybe: set this with an option.
- static const bool is_isa_v2 = true;
- Relocate()
- : Track_tls()
- { }
- // 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_powerpc*, Output_section*, size_t, const unsigned char*,
- const Sized_symbol<size>*, const Symbol_value<size>*,
- unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr,
- section_size_type);
- };
- class Relocate_comdat_behavior
- {
- public:
- // Decide what the linker should do for relocations that refer to
- // discarded comdat sections.
- inline Comdat_behavior
- get(const char* name)
- {
- gold::Default_comdat_behavior default_behavior;
- Comdat_behavior ret = default_behavior.get(name);
- if (ret == CB_ERROR)
- {
- if (size == 32
- && (strcmp(name, ".fixup") == 0
- || strcmp(name, ".got2") == 0))
- ret = CB_IGNORE;
- if (size == 64
- && (strcmp(name, ".opd") == 0
- || strcmp(name, ".toc") == 0
- || strcmp(name, ".toc1") == 0))
- ret = CB_IGNORE;
- }
- return ret;
- }
- };
- // 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.
- tls::Tls_optimization
- optimize_tls_gd(bool is_final)
- {
- // If we are generating a shared library, then we can't do anything
- // in the linker.
- if (parameters->options().shared()
- || !parameters->options().tls_optimize())
- return tls::TLSOPT_NONE;
- if (!is_final)
- return tls::TLSOPT_TO_IE;
- return tls::TLSOPT_TO_LE;
- }
- tls::Tls_optimization
- optimize_tls_ld()
- {
- if (parameters->options().shared()
- || !parameters->options().tls_optimize())
- return tls::TLSOPT_NONE;
- return tls::TLSOPT_TO_LE;
- }
- tls::Tls_optimization
- optimize_tls_ie(bool is_final)
- {
- if (!is_final
- || parameters->options().shared()
- || !parameters->options().tls_optimize())
- return tls::TLSOPT_NONE;
- return tls::TLSOPT_TO_LE;
- }
- // Create glink.
- void
- make_glink_section(Layout*);
- // Create the PLT section.
- void
- make_plt_section(Symbol_table*, Layout*);
- void
- make_iplt_section(Symbol_table*, Layout*);
- void
- make_lplt_section(Symbol_table*, Layout*);
- void
- make_brlt_section(Layout*);
- // Create a PLT entry for a global symbol.
- void
- make_plt_entry(Symbol_table*, Layout*, Symbol*);
- // Create a PLT entry for a local IFUNC symbol.
- void
- make_local_ifunc_plt_entry(Symbol_table*, Layout*,
- Sized_relobj_file<size, big_endian>*,
- unsigned int);
- // Create a PLT entry for a local non-IFUNC symbol.
- void
- make_local_plt_entry(Symbol_table*, Layout*,
- Sized_relobj_file<size, big_endian>*,
- unsigned int);
- void
- make_local_plt_entry(Symbol_table*, Layout*, Symbol*);
- // Create a GOT entry for local dynamic __tls_get_addr.
- unsigned int
- tlsld_got_offset(Symbol_table* symtab, Layout* layout,
- Sized_relobj_file<size, big_endian>* object);
- unsigned int
- tlsld_got_offset() const
- {
- return this->tlsld_got_offset_;
- }
- // Get the dynamic reloc section, creating it if necessary.
- Reloc_section*
- rela_dyn_section(Layout*);
- // Similarly, but for ifunc symbols get the one for ifunc.
- Reloc_section*
- rela_dyn_section(Symbol_table*, Layout*, bool for_ifunc);
- // 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, const elfcpp::Rela<size, big_endian>& reloc)
- {
- unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info());
- this->copy_relocs_.copy_reloc(symtab, layout,
- symtab->get_sized_symbol<size>(sym),
- object, shndx, output_section,
- r_type, reloc.get_r_offset(),
- reloc.get_r_addend(),
- this->rela_dyn_section(layout));
- }
- // Look over all the input sections, deciding where to place stubs.
- void
- group_sections(Layout*, const Task*, bool);
- // Sort output sections by address.
- struct Sort_sections
- {
- bool
- operator()(const Output_section* sec1, const Output_section* sec2)
- { return sec1->address() < sec2->address(); }
- };
- class Branch_info
- {
- public:
- Branch_info(Powerpc_relobj<size, big_endian>* ppc_object,
- unsigned int data_shndx,
- Address r_offset,
- unsigned int r_type,
- unsigned int r_sym,
- Address addend)
- : object_(ppc_object), shndx_(data_shndx), offset_(r_offset),
- r_type_(r_type), tocsave_ (0), r_sym_(r_sym), addend_(addend)
- { }
- ~Branch_info()
- { }
- // Return whether this branch is going via a plt call stub, and if
- // so, mark it as having an R_PPC64_TOCSAVE.
- bool
- mark_pltcall(Powerpc_relobj<size, big_endian>* ppc_object,
- unsigned int shndx, Address offset,
- Target_powerpc* target, Symbol_table* symtab);
- // If this branch needs a plt call stub, or a long branch stub, make one.
- bool
- make_stub(Stub_table<size, big_endian>*,
- Stub_table<size, big_endian>*,
- Symbol_table*) const;
- private:
- // The branch location..
- Powerpc_relobj<size, big_endian>* object_;
- unsigned int shndx_;
- Address offset_;
- // ..and the branch type and destination.
- unsigned int r_type_ : 31;
- unsigned int tocsave_ : 1;
- unsigned int r_sym_;
- Address addend_;
- };
- // Information about this specific target which we pass to the
- // general Target structure.
- static Target::Target_info powerpc_info;
- // The small GOT section used by ppc32, and by ppc64 for entries that
- // must be addresseed +/-32k from the got pointer.
- Output_data_got_powerpc<size, big_endian>* got_;
- // Another GOT section used for entries that can be addressed +/- 2G
- // from the got pointer.
- Output_data_got_powerpc<size, big_endian>* biggot_;
- // The PLT section. This is a container for a table of addresses,
- // and their relocations. Each address in the PLT has a dynamic
- // relocation (R_*_JMP_SLOT) and each address will have a
- // corresponding entry in .glink for lazy resolution of the PLT.
- // ppc32 initialises the PLT to point at the .glink entry, while
- // ppc64 leaves this to ld.so. To make a call via the PLT, the
- // linker adds a stub that loads the PLT entry into ctr then
- // branches to ctr. There may be more than one stub for each PLT
- // entry. DT_JMPREL points at the first PLT dynamic relocation and
- // DT_PLTRELSZ gives the total size of PLT dynamic relocations.
- Output_data_plt_powerpc<size, big_endian>* plt_;
- // The IPLT section. Like plt_, this is a container for a table of
- // addresses and their relocations, specifically for STT_GNU_IFUNC
- // functions that resolve locally (STT_GNU_IFUNC functions that
- // don't resolve locally go in PLT). Unlike plt_, these have no
- // entry in .glink for lazy resolution, and the relocation section
- // does not have a 1-1 correspondence with IPLT addresses. In fact,
- // the relocation section may contain relocations against
- // STT_GNU_IFUNC symbols at locations outside of IPLT. The
- // relocation section will appear at the end of other dynamic
- // relocations, so that ld.so applies these relocations after other
- // dynamic relocations. In a static executable, the relocation
- // section is emitted and marked with __rela_iplt_start and
- // __rela_iplt_end symbols.
- Output_data_plt_powerpc<size, big_endian>* iplt_;
- // A PLT style section for local, non-ifunc symbols
- Output_data_plt_powerpc<size, big_endian>* lplt_;
- // Section holding long branch destinations.
- Output_data_brlt_powerpc<size, big_endian>* brlt_section_;
- // The .glink section.
- Output_data_glink<size, big_endian>* glink_;
- // The dynamic reloc section.
- Reloc_section* rela_dyn_;
- // Relocs saved to avoid a COPY reloc.
- Powerpc_copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
- // Offset of the GOT entry for local dynamic __tls_get_addr calls.
- unsigned int tlsld_got_offset_;
- Stub_tables stub_tables_;
- typedef Unordered_map<Address, unsigned int> Branch_lookup_table;
- Branch_lookup_table branch_lookup_table_;
- typedef std::vector<Branch_info> Branches;
- Branches branch_info_;
- Tocsave_loc tocsave_loc_;
- bool power10_relocs_;
- bool plt_thread_safe_;
- bool plt_localentry0_;
- bool plt_localentry0_init_;
- bool has_localentry0_;
- bool has_tls_get_addr_opt_;
- bool no_tprel_opt_;
- bool relax_failed_;
- int relax_fail_count_;
- int32_t stub_group_size_;
- Output_data_save_res<size, big_endian> *savres_section_;
- // The "__tls_get_addr" symbol, if present
- Symbol* tls_get_addr_;
- // If optimizing __tls_get_addr calls, the "__tls_get_addr_opt" symbol.
- Symbol* tls_get_addr_opt_;
- // Attributes in output.
- Attributes_section_data* attributes_section_data_;
- // Last input file to change various attribute tags
- const char* last_fp_;
- const char* last_ld_;
- const char* last_vec_;
- const char* last_struct_;
- };
- template<>
- Target::Target_info Target_powerpc<32, true>::powerpc_info =
- {
- 32, // size
- true, // is_big_endian
- elfcpp::EM_PPC, // machine_code
- false, // has_make_symbol
- false, // has_resolve
- false, // has_code_fill
- true, // is_default_stack_executable
- false, // can_icf_inline_merge_sections
- '\0', // wrap_char
- "/usr/lib/ld.so.1", // dynamic_linker
- 0x10000000, // 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<>
- Target::Target_info Target_powerpc<32, false>::powerpc_info =
- {
- 32, // size
- false, // is_big_endian
- elfcpp::EM_PPC, // machine_code
- false, // has_make_symbol
- false, // has_resolve
- false, // has_code_fill
- true, // is_default_stack_executable
- false, // can_icf_inline_merge_sections
- '\0', // wrap_char
- "/usr/lib/ld.so.1", // dynamic_linker
- 0x10000000, // 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<>
- Target::Target_info Target_powerpc<64, true>::powerpc_info =
- {
- 64, // size
- true, // is_big_endian
- elfcpp::EM_PPC64, // machine_code
- false, // has_make_symbol
- true, // has_resolve
- false, // has_code_fill
- false, // is_default_stack_executable
- false, // can_icf_inline_merge_sections
- '\0', // wrap_char
- "/usr/lib/ld.so.1", // dynamic_linker
- 0x10000000, // 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<>
- Target::Target_info Target_powerpc<64, false>::powerpc_info =
- {
- 64, // size
- false, // is_big_endian
- elfcpp::EM_PPC64, // machine_code
- false, // has_make_symbol
- true, // has_resolve
- false, // has_code_fill
- false, // is_default_stack_executable
- false, // can_icf_inline_merge_sections
- '\0', // wrap_char
- "/usr/lib/ld.so.1", // dynamic_linker
- 0x10000000, // 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>
- inline bool
- is_branch_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_POWERPC_REL24
- || (size == 64 && r_type == elfcpp::R_PPC64_REL24_NOTOC)
- || r_type == elfcpp::R_PPC64_REL24_P9NOTOC
- || r_type == elfcpp::R_PPC_PLTREL24
- || r_type == elfcpp::R_PPC_LOCAL24PC
- || r_type == elfcpp::R_POWERPC_REL14
- || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
- || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN
- || r_type == elfcpp::R_POWERPC_ADDR24
- || r_type == elfcpp::R_POWERPC_ADDR14
- || r_type == elfcpp::R_POWERPC_ADDR14_BRTAKEN
- || r_type == elfcpp::R_POWERPC_ADDR14_BRNTAKEN);
- }
- // Reloc resolves to plt entry.
- template<int size>
- inline bool
- is_plt16_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_POWERPC_PLT16_LO
- || r_type == elfcpp::R_POWERPC_PLT16_HI
- || r_type == elfcpp::R_POWERPC_PLT16_HA
- || (size == 64 && r_type == elfcpp::R_PPC64_PLT16_LO_DS));
- }
- // GOT_TYPE_STANDARD or GOT_TYPE_SMALL (ie. not TLS) GOT relocs
- inline bool
- is_got_reloc(unsigned int r_type)
- {
- return (r_type == elfcpp::R_POWERPC_GOT16
- || r_type == elfcpp::R_POWERPC_GOT16_LO
- || r_type == elfcpp::R_POWERPC_GOT16_HI
- || r_type == elfcpp::R_POWERPC_GOT16_HA
- || r_type == elfcpp::R_PPC64_GOT16_DS
- || r_type == elfcpp::R_PPC64_GOT16_LO_DS
- || r_type == elfcpp::R_PPC64_GOT_PCREL34);
- }
- // If INSN is an opcode that may be used with an @tls operand, return
- // the transformed insn for TLS optimisation, otherwise return 0. If
- // REG is non-zero only match an insn with RB or RA equal to REG.
- uint32_t
- at_tls_transform(uint32_t insn, unsigned int reg)
- {
- if ((insn & (0x3f << 26)) != 31 << 26)
- return 0;
- unsigned int rtra;
- if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
- rtra = insn & ((1 << 26) - (1 << 16));
- else if (((insn >> 16) & 0x1f) == reg)
- rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
- else
- return 0;
- if ((insn & (0x3ff << 1)) == 266 << 1)
- // add -> addi
- insn = 14 << 26;
- else if ((insn & (0x1f << 1)) == 23 << 1
- && ((insn & (0x1f << 6)) < 14 << 6
- || ((insn & (0x1f << 6)) >= 16 << 6
- && (insn & (0x1f << 6)) < 24 << 6)))
- // load and store indexed -> dform
- insn = (32 | ((insn >> 6) & 0x1f)) << 26;
- else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
- // ldx, ldux, stdx, stdux -> ld, ldu, std, stdu
- insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
- else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
- // lwax -> lwa
- insn = (58 << 26) | 2;
- else
- return 0;
- insn |= rtra;
- return insn;
- }
- template<int size, bool big_endian>
- class Powerpc_relocate_functions
- {
- public:
- enum Overflow_check
- {
- CHECK_NONE,
- CHECK_SIGNED,
- CHECK_UNSIGNED,
- CHECK_BITFIELD,
- CHECK_LOW_INSN,
- CHECK_HIGH_INSN
- };
- enum Status
- {
- STATUS_OK,
- STATUS_OVERFLOW
- };
- private:
- typedef Powerpc_relocate_functions<size, big_endian> This;
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedAddress;
- template<int valsize>
- static inline bool
- has_overflow_signed(Address value)
- {
- // limit = 1 << (valsize - 1) without shift count exceeding size of type
- Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
- limit <<= ((valsize - 1) >> 1);
- limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
- return value + limit > (limit << 1) - 1;
- }
- template<int valsize>
- static inline bool
- has_overflow_unsigned(Address value)
- {
- Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
- limit <<= ((valsize - 1) >> 1);
- limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
- return value > (limit << 1) - 1;
- }
- template<int valsize>
- static inline bool
- has_overflow_bitfield(Address value)
- {
- return (has_overflow_unsigned<valsize>(value)
- && has_overflow_signed<valsize>(value));
- }
- template<int valsize>
- static inline Status
- overflowed(Address value, Overflow_check overflow)
- {
- if (overflow == CHECK_SIGNED)
- {
- if (has_overflow_signed<valsize>(value))
- return STATUS_OVERFLOW;
- }
- else if (overflow == CHECK_UNSIGNED)
- {
- if (has_overflow_unsigned<valsize>(value))
- return STATUS_OVERFLOW;
- }
- else if (overflow == CHECK_BITFIELD)
- {
- if (has_overflow_bitfield<valsize>(value))
- return STATUS_OVERFLOW;
- }
- return STATUS_OK;
- }
- // Do a simple RELA relocation
- template<int fieldsize, int valsize>
- static inline Status
- rela(unsigned char* view, Address value, Overflow_check overflow)
- {
- typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
- Valtype* wv = reinterpret_cast<Valtype*>(view);
- elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value);
- return overflowed<valsize>(value, overflow);
- }
- template<int fieldsize, int valsize>
- static inline Status
- rela(unsigned char* view,
- unsigned int right_shift,
- typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
- Address value,
- Overflow_check overflow)
- {
- typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
- Valtype* wv = reinterpret_cast<Valtype*>(view);
- Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv);
- if (overflow == CHECK_SIGNED)
- value = static_cast<SignedAddress>(value) >> right_shift;
- else
- value = value >> right_shift;
- Valtype reloc = value;
- val &= ~dst_mask;
- reloc &= dst_mask;
- elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc);
- return overflowed<valsize>(value, overflow);
- }
- // Do a simple RELA relocation, unaligned.
- template<int fieldsize, int valsize>
- static inline Status
- rela_ua(unsigned char* view, Address value, Overflow_check overflow)
- {
- elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value);
- return overflowed<valsize>(value, overflow);
- }
- template<int fieldsize, int valsize>
- static inline Status
- rela_ua(unsigned char* view,
- unsigned int right_shift,
- typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
- Address value,
- Overflow_check overflow)
- {
- typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype
- Valtype;
- Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view);
- if (overflow == CHECK_SIGNED)
- value = static_cast<SignedAddress>(value) >> right_shift;
- else
- value = value >> right_shift;
- Valtype reloc = value;
- val &= ~dst_mask;
- reloc &= dst_mask;
- elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc);
- return overflowed<valsize>(value, overflow);
- }
- public:
- // R_PPC64_ADDR64: (Symbol + Addend)
- static inline void
- addr64(unsigned char* view, Address value)
- { This::template rela<64,64>(view, value, CHECK_NONE); }
- // R_PPC64_UADDR64: (Symbol + Addend) unaligned
- static inline void
- addr64_u(unsigned char* view, Address value)
- { This::template rela_ua<64,64>(view, value, CHECK_NONE); }
- // R_POWERPC_ADDR32: (Symbol + Addend)
- static inline Status
- addr32(unsigned char* view, Address value, Overflow_check overflow)
- { return This::template rela<32,32>(view, value, overflow); }
- // R_POWERPC_UADDR32: (Symbol + Addend) unaligned
- static inline Status
- addr32_u(unsigned char* view, Address value, Overflow_check overflow)
- { return This::template rela_ua<32,32>(view, value, overflow); }
- // R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
- static inline Status
- addr24(unsigned char* view, Address value, Overflow_check overflow)
- {
- Status stat = This::template rela<32,26>(view, 0, 0x03fffffc,
- value, overflow);
- if (overflow != CHECK_NONE && (value & 3) != 0)
- stat = STATUS_OVERFLOW;
- return stat;
- }
- // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
- static inline Status
- addr16(unsigned char* view, Address value, Overflow_check overflow)
- { return This::template rela<16,16>(view, value, overflow); }
- // R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
- static inline Status
- addr16_u(unsigned char* view, Address value, Overflow_check overflow)
- { return This::template rela_ua<16,16>(view, value, overflow); }
- // R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
- static inline Status
- addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
- {
- Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow);
- if ((value & 3) != 0)
- stat = STATUS_OVERFLOW;
- return stat;
- }
- // R_POWERPC_ADDR16_DQ: (Symbol + Addend) & 0xfff0
- static inline Status
- addr16_dq(unsigned char* view, Address value, Overflow_check overflow)
- {
- Status stat = This::template rela<16,16>(view, 0, 0xfff0, value, overflow);
- if ((value & 15) != 0)
- stat = STATUS_OVERFLOW;
- return stat;
- }
- // R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
- static inline void
- addr16_hi(unsigned char* view, Address value)
- { This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); }
- // R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
- static inline void
- addr16_ha(unsigned char* view, Address value)
- { This::addr16_hi(view, value + 0x8000); }
- // R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
- static inline void
- addr16_hi2(unsigned char* view, Address value)
- { This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); }
- // R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
- static inline void
- addr16_ha2(unsigned char* view, Address value)
- { This::addr16_hi2(view, value + 0x8000); }
- // R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
- static inline void
- addr16_hi3(unsigned char* view, Address value)
- { This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); }
- // R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
- static inline void
- addr16_ha3(unsigned char* view, Address value)
- { This::addr16_hi3(view, value + 0x8000); }
- // R_POWERPC_ADDR14: (Symbol + Addend) & 0xfffc
- static inline Status
- addr14(unsigned char* view, Address value, Overflow_check overflow)
- {
- Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow);
- if (overflow != CHECK_NONE && (value & 3) != 0)
- stat = STATUS_OVERFLOW;
- return stat;
- }
- // R_POWERPC_REL16DX_HA
- static inline Status
- addr16dx_ha(unsigned char *view, Address value, Overflow_check overflow)
- {
- typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
- Valtype* wv = reinterpret_cast<Valtype*>(view);
- Valtype val = elfcpp::Swap<32, big_endian>::readval(wv);
- value += 0x8000;
- value = static_cast<SignedAddress>(value) >> 16;
- val |= (value & 0xffc1) | ((value & 0x3e) << 15);
- elfcpp::Swap<32, big_endian>::writeval(wv, val);
- return overflowed<16>(value, overflow);
- }
- // R_PPC64_D34
- static inline Status
- addr34(unsigned char *view, uint64_t value, Overflow_check overflow)
- {
- Status stat = This::template rela<32,18>(view, 16, 0x3ffff,
- value, overflow);
- This::rela<32,16>(view + 4, 0, 0xffff, value, CHECK_NONE);
- return stat;
- }
- // R_PPC64_D34_HI30
- static inline void
- addr34_hi(unsigned char *view, uint64_t value)
- { This::addr34(view, value >> 34, CHECK_NONE);}
- // R_PPC64_D34_HA30
- static inline void
- addr34_ha(unsigned char *view, uint64_t value)
- { This::addr34_hi(view, value + (1ULL << 33));}
- // R_PPC64_D28
- static inline Status
- addr28(unsigned char *view, uint64_t value, Overflow_check overflow)
- {
- Status stat = This::template rela<32,12>(view, 16, 0xfff,
- value, overflow);
- This::rela<32,16>(view + 4, 0, 0xffff, value, CHECK_NONE);
- return stat;
- }
- // R_PPC64_ADDR16_HIGHER34
- static inline void
- addr16_higher34(unsigned char* view, uint64_t value)
- { This::addr16(view, value >> 34, CHECK_NONE); }
- // R_PPC64_ADDR16_HIGHERA34
- static inline void
- addr16_highera34(unsigned char* view, uint64_t value)
- { This::addr16_higher34(view, value + (1ULL << 33)); }
- // R_PPC64_ADDR16_HIGHEST34
- static inline void
- addr16_highest34(unsigned char* view, uint64_t value)
- { This::addr16(view, value >> 50, CHECK_NONE); }
- // R_PPC64_ADDR16_HIGHESTA34
- static inline void
- addr16_highesta34(unsigned char* view, uint64_t value)
- { This::addr16_highest34(view, value + (1ULL << 33)); }
- };
- // Set ABI version for input and output.
- template<int size, bool big_endian>
- void
- Powerpc_relobj<size, big_endian>::set_abiversion(int ver)
- {
- this->e_flags_ |= ver;
- if (this->abiversion() != 0)
- {
- Target_powerpc<size, big_endian>* target =
- static_cast<Target_powerpc<size, big_endian>*>(
- parameters->sized_target<size, big_endian>());
- if (target->abiversion() == 0)
- target->set_abiversion(this->abiversion());
- else if (target->abiversion() != this->abiversion())
- gold_error(_("%s: ABI version %d is not compatible "
- "with ABI version %d output"),
- this->name().c_str(),
- this->abiversion(), target->abiversion());
- }
- }
- // Stash away the index of .got2, .opd, .rela.toc, and .toc in a
- // relocatable object, if such sections exists.
- template<int size, bool big_endian>
- bool
- Powerpc_relobj<size, big_endian>::do_find_special_sections(
- Read_symbols_data* sd)
- {
- const unsigned char* const pshdrs = sd->section_headers->data();
- const unsigned char* namesu = sd->section_names->data();
- const char* names = reinterpret_cast<const char*>(namesu);
- section_size_type names_size = sd->section_names_size;
- const unsigned char* s;
- s = this->template find_shdr<size, big_endian>(pshdrs,
- size == 32 ? ".got2" : ".opd",
- names, names_size, NULL);
- if (s != NULL)
- {
- unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
- this->special_ = ndx;
- if (size == 64)
- {
- if (this->abiversion() == 0)
- this->set_abiversion(1);
- else if (this->abiversion() > 1)
- gold_error(_("%s: .opd invalid in abiv%d"),
- this->name().c_str(), this->abiversion());
- }
- }
- if (size == 64)
- {
- s = this->template find_shdr<size, big_endian>(pshdrs, ".rela.toc",
- names, names_size, NULL);
- if (s != NULL)
- {
- unsigned int ndx = (s - pshdrs) / elfcpp::Elf_sizes<size>::shdr_size;
- this->relatoc_ = ndx;
- typename elfcpp::Shdr<size, big_endian> shdr(s);
- this->toc_ = this->adjust_shndx(shdr.get_sh_info());
- }
- }
- return Sized_relobj_file<size, big_endian>::do_find_special_sections(sd);
- }
- // Examine .rela.opd to build info about function entry points.
- template<int size, bool big_endian>
- void
- Powerpc_relobj<size, big_endian>::scan_opd_relocs(
- size_t reloc_count,
- const unsigned char* prelocs,
- const unsigned char* plocal_syms)
- {
- if (size == 64)
- {
- typedef typename elfcpp::Rela<size, big_endian> Reltype;
- const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
- Address expected_off = 0;
- bool regular = true;
- unsigned int opd_ent_size = 0;
- for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
- {
- Reltype reloc(prelocs);
- typename elfcpp::Elf_types<size>::Elf_WXword r_info
- = reloc.get_r_info();
- unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
- if (r_type == elfcpp::R_PPC64_ADDR64)
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
- typename elfcpp::Elf_types<size>::Elf_Addr value;
- bool is_ordinary;
- unsigned int shndx;
- if (r_sym < this->local_symbol_count())
- {
- typename elfcpp::Sym<size, big_endian>
- lsym(plocal_syms + r_sym * sym_size);
- shndx = lsym.get_st_shndx();
- shndx = this->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
- value = lsym.get_st_value();
- }
- else
- shndx = this->symbol_section_and_value(r_sym, &value,
- &is_ordinary);
- this->set_opd_ent(reloc.get_r_offset(), shndx,
- value + reloc.get_r_addend());
- if (i == 2)
- {
- expected_off = reloc.get_r_offset();
- opd_ent_size = expected_off;
- }
- else if (expected_off != reloc.get_r_offset())
- regular = false;
- expected_off += opd_ent_size;
- }
- else if (r_type == elfcpp::R_PPC64_TOC)
- {
- if (expected_off - opd_ent_size + 8 != reloc.get_r_offset())
- regular = false;
- }
- else
- {
- gold_warning(_("%s: unexpected reloc type %u in .opd section"),
- this->name().c_str(), r_type);
- regular = false;
- }
- }
- if (reloc_count <= 2)
- opd_ent_size = this->section_size(this->opd_shndx());
- if (opd_ent_size != 24 && opd_ent_size != 16)
- regular = false;
- if (!regular)
- {
- gold_warning(_("%s: .opd is not a regular array of opd entries"),
- this->name().c_str());
- opd_ent_size = 0;
- }
- }
- }
- // Returns true if a code sequence loading the TOC entry at VALUE
- // relative to the TOC pointer can be converted into code calculating
- // a TOC pointer relative offset.
- // If so, the TOC pointer relative offset is stored to VALUE.
- template<int size, bool big_endian>
- bool
- Powerpc_relobj<size, big_endian>::make_toc_relative(
- Target_powerpc<size, big_endian>* target,
- Address* value)
- {
- if (size != 64)
- return false;
- // With -mcmodel=medium code it is quite possible to have
- // toc-relative relocs referring to objects outside the TOC.
- // Don't try to look at a non-existent TOC.
- if (this->toc_shndx() == 0
- || this->output_section(this->toc_shndx()) == 0)
- return false;
- // Convert VALUE back to an address by adding got_base (see below),
- // then to an offset in the TOC by subtracting the TOC output
- // section address and the TOC output offset.
- Address off = (*value + target->toc_pointer()
- - this->output_section(this->toc_shndx())->address()
- - this->output_section_offset(this->toc_shndx()));
- // Is this offset in the TOC? -mcmodel=medium code may be using
- // TOC relative access to variables outside the TOC. Those of
- // course can't be optimized. We also don't try to optimize code
- // that is using a different object's TOC.
- if (off >= this->section_size(this->toc_shndx()))
- return false;
- if (this->no_toc_opt(off))
- return false;
- section_size_type vlen;
- unsigned char* view = this->get_output_view(this->toc_shndx(), &vlen);
- Address addr = elfcpp::Swap<size, big_endian>::readval(view + off);
- // The TOC pointer
- Address got_base = target->toc_pointer();
- addr -= got_base;
- if (addr + (uint64_t) 0x80008000 >= (uint64_t) 1 << 32)
- return false;
- *value = addr;
- return true;
- }
- template<int size, bool big_endian>
- bool
- Powerpc_relobj<size, big_endian>::make_got_relative(
- Target_powerpc<size, big_endian>* target,
- const Symbol_value<size>* psymval,
- Address addend,
- Address* value)
- {
- Address addr = psymval->value(this, addend);
- Address got_base = target->toc_pointer();
- addr -= got_base;
- if (addr + 0x80008000 > 0xffffffff)
- return false;
- *value = addr;
- return true;
- }
- // Perform the Sized_relobj_file method, then set up opd info from
- // .opd relocs.
- template<int size, bool big_endian>
- void
- Powerpc_relobj<size, big_endian>::do_read_relocs(Read_relocs_data* rd)
- {
- Sized_relobj_file<size, big_endian>::do_read_relocs(rd);
- if (size == 64)
- {
- for (Read_relocs_data::Relocs_list::iterator p = rd->relocs.begin();
- p != rd->relocs.end();
- ++p)
- {
- if (p->data_shndx == this->opd_shndx())
- {
- uint64_t opd_size = this->section_size(this->opd_shndx());
- gold_assert(opd_size == static_cast<size_t>(opd_size));
- if (opd_size != 0)
- {
- this->init_opd(opd_size);
- this->scan_opd_relocs(p->reloc_count, p->contents->data(),
- rd->local_symbols->data());
- }
- break;
- }
- }
- }
- }
- // Read the symbols then set up st_other vector.
- template<int size, bool big_endian>
- void
- Powerpc_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
- {
- this->base_read_symbols(sd);
- if (this->input_file()->format() != Input_file::FORMAT_ELF)
- return;
- if (size == 64)
- {
- const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
- const unsigned char* const pshdrs = sd->section_headers->data();
- const unsigned int loccount = this->do_local_symbol_count();
- if (loccount != 0)
- {
- this->st_other_.resize(loccount);
- const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
- off_t locsize = loccount * sym_size;
- const unsigned int symtab_shndx = this->symtab_shndx();
- const unsigned char *psymtab = pshdrs + symtab_shndx * shdr_size;
- typename elfcpp::Shdr<size, big_endian> shdr(psymtab);
- const unsigned char* psyms = this->get_view(shdr.get_sh_offset(),
- locsize, true, false);
- 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->st_other_[i] = st_other;
- if ((st_other & elfcpp::STO_PPC64_LOCAL_MASK) != 0)
- {
- if (this->abiversion() == 0)
- this->set_abiversion(2);
- else if (this->abiversion() < 2)
- gold_error(_("%s: local symbol %d has invalid st_other"
- " for ABI version 1"),
- this->name().c_str(), i);
- }
- }
- }
- }
- const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
- const unsigned char* ps = sd->section_headers->data() + shdr_size;
- bool merge_attributes = false;
- for (unsigned int i = 1; i < this->shnum(); ++i, ps += shdr_size)
- {
- elfcpp::Shdr<size, big_endian> shdr(ps);
- switch (shdr.get_sh_type())
- {
- case 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);
- }
- break;
- case elfcpp::SHT_SYMTAB:
- {
- // 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 flags from such an object.
- const typename elfcpp::Elf_types<size>::Elf_WXword sym_size =
- elfcpp::Elf_sizes<size>::sym_size;
- if (shdr.get_sh_size() > sym_size)
- merge_attributes = true;
- }
- break;
- case elfcpp::SHT_STRTAB:
- break;
- default:
- merge_attributes = true;
- break;
- }
- }
- if (!merge_attributes)
- {
- // Should rarely happen.
- delete this->attributes_section_data_;
- this->attributes_section_data_ = NULL;
- }
- }
- template<int size, bool big_endian>
- void
- Powerpc_dynobj<size, big_endian>::set_abiversion(int ver)
- {
- this->e_flags_ |= ver;
- if (this->abiversion() != 0)
- {
- Target_powerpc<size, big_endian>* target =
- static_cast<Target_powerpc<size, big_endian>*>(
- parameters->sized_target<size, big_endian>());
- if (target->abiversion() == 0)
- target->set_abiversion(this->abiversion());
- else if (target->abiversion() != this->abiversion())
- gold_error(_("%s: ABI version %d is not compatible "
- "with ABI version %d output"),
- this->name().c_str(),
- this->abiversion(), target->abiversion());
- }
- }
- // Call Sized_dynobj::base_read_symbols to read the symbols then
- // read .opd from a dynamic object, filling in opd_ent_ vector,
- template<int size, bool big_endian>
- void
- Powerpc_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
- {
- this->base_read_symbols(sd);
- const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
- const unsigned char* ps =
- sd->section_headers->data() + shdr_size * (this->shnum() - 1);
- for (unsigned int i = this->shnum(); i > 0; --i, ps -= shdr_size)
- {
- elfcpp::Shdr<size, big_endian> shdr(ps);
- if (shdr.get_sh_type() == elfcpp::SHT_GNU_ATTRIBUTES)
- {
- 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);
- break;
- }
- }
- if (size == 64)
- {
- const unsigned char* const pshdrs = sd->section_headers->data();
- const unsigned char* namesu = sd->section_names->data();
- const char* names = reinterpret_cast<const char*>(namesu);
- const unsigned char* s = NULL;
- const unsigned char* opd;
- section_size_type opd_size;
- // Find and read .opd section.
- while (1)
- {
- s = this->template find_shdr<size, big_endian>(pshdrs, ".opd", names,
- sd->section_names_size,
- s);
- if (s == NULL)
- return;
- typename elfcpp::Shdr<size, big_endian> shdr(s);
- if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
- && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0)
- {
- if (this->abiversion() == 0)
- this->set_abiversion(1);
- else if (this->abiversion() > 1)
- gold_error(_("%s: .opd invalid in abiv%d"),
- this->name().c_str(), this->abiversion());
- this->opd_shndx_ = (s - pshdrs) / shdr_size;
- this->opd_address_ = shdr.get_sh_addr();
- opd_size = convert_to_section_size_type(shdr.get_sh_size());
- opd = this->get_view(shdr.get_sh_offset(), opd_size,
- true, false);
- break;
- }
- }
- // Build set of executable sections.
- // Using a set is probably overkill. There is likely to be only
- // a few executable sections, typically .init, .text and .fini,
- // and they are generally grouped together.
- typedef std::set<Sec_info> Exec_sections;
- Exec_sections exec_sections;
- s = pshdrs;
- for (unsigned int i = 1; i < this->shnum(); ++i, s += shdr_size)
- {
- typename elfcpp::Shdr<size, big_endian> shdr(s);
- if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
- && ((shdr.get_sh_flags()
- & (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
- == (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR))
- && shdr.get_sh_size() != 0)
- {
- exec_sections.insert(Sec_info(shdr.get_sh_addr(),
- shdr.get_sh_size(), i));
- }
- }
- if (exec_sections.empty())
- return;
- // Look over the OPD entries. This is complicated by the fact
- // that some binaries will use two-word entries while others
- // will use the standard three-word entries. In most cases
- // the third word (the environment pointer for languages like
- // Pascal) is unused and will be zero. If the third word is
- // used it should not be pointing into executable sections,
- // I think.
- this->init_opd(opd_size);
- for (const unsigned char* p = opd; p < opd + opd_size; p += 8)
- {
- typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype;
- const Valtype* valp = reinterpret_cast<const Valtype*>(p);
- Valtype val = elfcpp::Swap<64, big_endian>::readval(valp);
- if (val == 0)
- // Chances are that this is the third word of an OPD entry.
- continue;
- typename Exec_sections::const_iterator e
- = exec_sections.upper_bound(Sec_info(val, 0, 0));
- if (e != exec_sections.begin())
- {
- --e;
- if (e->start <= val && val < e->start + e->len)
- {
- // We have an address in an executable section.
- // VAL ought to be the function entry, set it up.
- this->set_opd_ent(p - opd, e->shndx, val);
- // Skip second word of OPD entry, the TOC pointer.
- p += 8;
- }
- }
- // If we didn't match any executable sections, we likely
- // have a non-zero third word in the OPD entry.
- }
- }
- }
- // Relocate sections.
- template<int size, bool big_endian>
- void
- Powerpc_relobj<size, big_endian>::do_relocate_sections(
- const Symbol_table* symtab, const Layout* layout,
- const unsigned char* pshdrs, Output_file* of,
- typename Sized_relobj_file<size, big_endian>::Views* pviews)
- {
- unsigned int start = 1;
- if (size == 64
- && this->relatoc_ != 0
- && !parameters->options().relocatable())
- {
- // Relocate .toc first.
- this->relocate_section_range(symtab, layout, pshdrs, of, pviews,
- this->relatoc_, this->relatoc_);
- this->relocate_section_range(symtab, layout, pshdrs, of, pviews,
- 1, this->relatoc_ - 1);
- start = this->relatoc_ + 1;
- }
- this->relocate_section_range(symtab, layout, pshdrs, of, pviews,
- start, this->shnum() - 1);
- }
- // Set up some symbols.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::do_define_standard_symbols(
- Symbol_table* symtab,
- Layout* layout)
- {
- if (size == 32)
- {
- // Define _GLOBAL_OFFSET_TABLE_ to ensure it isn't seen as
- // undefined when scanning relocs (and thus requires
- // non-relative dynamic relocs). The proper value will be
- // updated later.
- Symbol *gotsym = symtab->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
- if (gotsym != NULL && gotsym->is_undefined())
- {
- Target_powerpc<size, big_endian>* target =
- static_cast<Target_powerpc<size, big_endian>*>(
- parameters->sized_target<size, big_endian>());
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, GOT_TYPE_SMALL);
- symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
- Symbol_table::PREDEFINED,
- got, 0, 0,
- elfcpp::STT_OBJECT,
- elfcpp::STB_LOCAL,
- elfcpp::STV_HIDDEN, 0,
- false, false);
- }
- // Define _SDA_BASE_ at the start of the .sdata section + 32768.
- Symbol *sdasym = symtab->lookup("_SDA_BASE_", NULL);
- if (sdasym != NULL && sdasym->is_undefined())
- {
- Output_data_space* sdata = new Output_data_space(4, "** sdata");
- Output_section* os
- = layout->add_output_section_data(".sdata", 0,
- elfcpp::SHF_ALLOC
- | elfcpp::SHF_WRITE,
- sdata, ORDER_SMALL_DATA, false);
- symtab->define_in_output_data("_SDA_BASE_", NULL,
- Symbol_table::PREDEFINED,
- os, 32768, 0, elfcpp::STT_OBJECT,
- elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN,
- 0, false, false);
- }
- }
- else
- {
- // Define .TOC. as for 32-bit _GLOBAL_OFFSET_TABLE_
- Symbol *gotsym = symtab->lookup(".TOC.", NULL);
- if (gotsym != NULL && gotsym->is_undefined())
- {
- Target_powerpc<size, big_endian>* target =
- static_cast<Target_powerpc<size, big_endian>*>(
- parameters->sized_target<size, big_endian>());
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, GOT_TYPE_SMALL);
- symtab->define_in_output_data(".TOC.", NULL,
- Symbol_table::PREDEFINED,
- got, 0x8000, 0,
- elfcpp::STT_OBJECT,
- elfcpp::STB_LOCAL,
- elfcpp::STV_HIDDEN, 0,
- false, false);
- }
- }
- this->tls_get_addr_ = symtab->lookup("__tls_get_addr");
- if (parameters->options().tls_get_addr_optimize()
- && this->tls_get_addr_ != NULL
- && this->tls_get_addr_->in_reg())
- this->tls_get_addr_opt_ = symtab->lookup("__tls_get_addr_opt");
- if (this->tls_get_addr_opt_ != NULL)
- {
- if (this->tls_get_addr_->is_undefined()
- || this->tls_get_addr_->is_from_dynobj())
- {
- // Make it seem as if references to __tls_get_addr are
- // really to __tls_get_addr_opt, so the latter symbol is
- // made dynamic, not the former.
- this->tls_get_addr_->clear_in_reg();
- this->tls_get_addr_opt_->set_in_reg();
- }
- // We have a non-dynamic definition for __tls_get_addr.
- // Make __tls_get_addr_opt the same, if it does not already have
- // a non-dynamic definition.
- else if (this->tls_get_addr_opt_->is_undefined()
- || this->tls_get_addr_opt_->is_from_dynobj())
- {
- Sized_symbol<size>* from
- = static_cast<Sized_symbol<size>*>(this->tls_get_addr_);
- Sized_symbol<size>* to
- = static_cast<Sized_symbol<size>*>(this->tls_get_addr_opt_);
- symtab->clone<size>(to, from);
- }
- }
- }
- // Set up PowerPC target specific relobj.
- template<int size, bool big_endian>
- Object*
- Target_powerpc<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()))
- {
- Powerpc_relobj<size, big_endian>* obj =
- new Powerpc_relobj<size, big_endian>(name, input_file, offset, ehdr);
- obj->setup();
- return obj;
- }
- else if (et == elfcpp::ET_DYN)
- {
- Powerpc_dynobj<size, big_endian>* obj =
- new Powerpc_dynobj<size, big_endian>(name, input_file, offset, ehdr);
- obj->setup();
- return obj;
- }
- else
- {
- gold_error(_("%s: unsupported ELF file type %d"), name.c_str(), et);
- return NULL;
- }
- }
- template<int size, bool big_endian>
- class Output_data_got_powerpc : public Output_data_got<size, big_endian>
- {
- public:
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
- typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Rela_dyn;
- Output_data_got_powerpc(Symbol_table* symtab, Layout* layout,
- Got_type got_type)
- : Output_data_got<size, big_endian>(),
- symtab_(symtab), layout_(layout),
- header_ent_cnt_(size == 32 ? 3 : 1),
- header_index_(size == 32 ? 0x2000 : -1u)
- {
- if (size == 64)
- this->set_addralign(256);
- if (size == 64 && (got_type & GOT_TYPE_SMALL))
- this->make_header();
- }
- // Override all the Output_data_got methods we use so as to first call
- // reserve_ent().
- bool
- add_global(Symbol* gsym, unsigned int got_type, uint64_t addend)
- {
- this->reserve_ent();
- return Output_data_got<size, big_endian>::add_global(gsym, got_type,
- addend);
- }
- bool
- add_global_plt(Symbol* gsym, unsigned int got_type, uint64_t addend)
- {
- this->reserve_ent();
- return Output_data_got<size, big_endian>::add_global_plt(gsym, got_type,
- addend);
- }
- bool
- add_global_tls(Symbol* gsym, unsigned int got_type, uint64_t addend)
- { return this->add_global_plt(gsym, got_type, addend); }
- void
- add_global_with_rel(Symbol* gsym, unsigned int got_type,
- Output_data_reloc_generic* rel_dyn,
- unsigned int r_type, uint64_t addend)
- {
- this->reserve_ent();
- Output_data_got<size, big_endian>::
- add_global_with_rel(gsym, got_type, rel_dyn, r_type, addend);
- }
- void
- add_global_pair_with_rel(Symbol* gsym, unsigned int got_type,
- Output_data_reloc_generic* rel_dyn,
- unsigned int r_type_1, unsigned int r_type_2,
- uint64_t addend)
- {
- if (gsym->has_got_offset(got_type))
- return;
- this->reserve_ent(2);
- Output_data_got<size, big_endian>::
- add_global_pair_with_rel(gsym, got_type, rel_dyn, r_type_1, r_type_2,
- addend);
- }
- bool
- add_local(Relobj* object, unsigned int sym_index, unsigned int got_type,
- uint64_t addend)
- {
- this->reserve_ent();
- return Output_data_got<size, big_endian>::add_local(object, sym_index,
- got_type, addend);
- }
- bool
- add_local_plt(Relobj* object, unsigned int sym_index,
- unsigned int got_type, uint64_t addend)
- {
- this->reserve_ent();
- return Output_data_got<size, big_endian>::add_local_plt(object, sym_index,
- got_type, addend);
- }
- bool
- add_local_tls(Relobj* object, unsigned int sym_index,
- unsigned int got_type, uint64_t addend)
- { return this->add_local_plt(object, sym_index, got_type, addend); }
- void
- add_local_tls_pair(Relobj* object, unsigned int sym_index,
- unsigned int got_type,
- Output_data_reloc_generic* rel_dyn,
- unsigned int r_type, uint64_t addend)
- {
- if (object->local_has_got_offset(sym_index, got_type, addend))
- return;
- this->reserve_ent(2);
- Output_data_got<size, big_endian>::
- add_local_tls_pair(object, sym_index, got_type, rel_dyn, r_type, addend);
- }
- unsigned int
- add_constant(Valtype constant)
- {
- this->reserve_ent();
- return Output_data_got<size, big_endian>::add_constant(constant);
- }
- unsigned int
- add_constant_pair(Valtype c1, Valtype c2)
- {
- this->reserve_ent(2);
- return Output_data_got<size, big_endian>::add_constant_pair(c1, c2);
- }
- // Offset of _GLOBAL_OFFSET_TABLE_ and .TOC. in this section.
- unsigned int
- g_o_t() const
- {
- if (size == 32)
- return this->got_offset(this->header_index_);
- else if (this->header_index_ != -1u)
- return this->got_offset(this->header_index_) + 0x8000;
- else
- gold_unreachable();
- }
- // Ensure our GOT has a header.
- void
- set_final_data_size()
- {
- if (size == 32 && this->header_ent_cnt_ != 0)
- this->make_header();
- Output_data_got<size, big_endian>::set_final_data_size();
- }
- // First word of GOT header needs some values that are not
- // handled by Output_data_got so poke them in here.
- // For 32-bit, address of .dynamic, for 64-bit, address of TOCbase.
- void
- do_write(Output_file* of)
- {
- if (this->header_index_ != -1u)
- {
- Valtype val = 0;
- if (size == 32 && this->layout_->dynamic_data() != NULL)
- val = this->layout_->dynamic_section()->address();
- if (size == 64)
- val = this->address() + this->g_o_t();
- this->replace_constant(this->header_index_, val);
- }
- Output_data_got<size, big_endian>::do_write(of);
- }
- private:
- void
- reserve_ent(unsigned int cnt = 1)
- {
- if (size != 32 || this->header_ent_cnt_ == 0)
- return;
- if (this->num_entries() + cnt > this->header_index_)
- this->make_header();
- }
- void
- make_header()
- {
- this->header_ent_cnt_ = 0;
- this->header_index_ = this->num_entries();
- if (size == 32)
- {
- Output_data_got<size, big_endian>::add_constant(0);
- Output_data_got<size, big_endian>::add_constant(0);
- Output_data_got<size, big_endian>::add_constant(0);
- // Define _GLOBAL_OFFSET_TABLE_ at the header
- Symbol *gotsym = this->symtab_->lookup("_GLOBAL_OFFSET_TABLE_", NULL);
- if (gotsym != NULL)
- {
- Sized_symbol<size>* sym = static_cast<Sized_symbol<size>*>(gotsym);
- sym->set_value(this->g_o_t());
- }
- else
- this->symtab_->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
- Symbol_table::PREDEFINED,
- this, this->g_o_t(), 0,
- elfcpp::STT_OBJECT,
- elfcpp::STB_LOCAL,
- elfcpp::STV_HIDDEN, 0,
- false, false);
- }
- else
- Output_data_got<size, big_endian>::add_constant(0);
- }
- // Stashed pointers.
- Symbol_table* symtab_;
- Layout* layout_;
- // GOT header size.
- unsigned int header_ent_cnt_;
- // GOT header index.
- unsigned int header_index_;
- };
- // Get the GOT section, creating it if necessary.
- template<int size, bool big_endian>
- Output_data_got_powerpc<size, big_endian>*
- Target_powerpc<size, big_endian>::got_section(Symbol_table* symtab,
- Layout* layout,
- Got_type got_type)
- {
- if (this->got_ == NULL)
- {
- gold_assert(symtab != NULL && layout != NULL);
- this->got_
- = new Output_data_got_powerpc<size, big_endian>(symtab, layout,
- GOT_TYPE_SMALL);
- layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
- elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
- this->got_, ORDER_DATA, false);
- }
- if (size == 32 || (got_type & GOT_TYPE_SMALL))
- return this->got_;
- if (this->biggot_ == NULL)
- {
- this->biggot_
- = new Output_data_got_powerpc<size, big_endian>(symtab, layout,
- GOT_TYPE_STANDARD);
- layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
- elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
- this->biggot_, ORDER_DATA, false);
- }
- return this->biggot_;
- }
- // Get the dynamic reloc section, creating it if necessary.
- template<int size, bool big_endian>
- typename Target_powerpc<size, big_endian>::Reloc_section*
- Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
- {
- if (this->rela_dyn_ == NULL)
- {
- gold_assert(layout != NULL);
- this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
- layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
- elfcpp::SHF_ALLOC, this->rela_dyn_,
- ORDER_DYNAMIC_RELOCS, false);
- }
- return this->rela_dyn_;
- }
- // Similarly, but for ifunc symbols get the one for ifunc.
- template<int size, bool big_endian>
- typename Target_powerpc<size, big_endian>::Reloc_section*
- Target_powerpc<size, big_endian>::rela_dyn_section(Symbol_table* symtab,
- Layout* layout,
- bool for_ifunc)
- {
- if (!for_ifunc)
- return this->rela_dyn_section(layout);
- if (this->iplt_ == NULL)
- this->make_iplt_section(symtab, layout);
- return this->iplt_->rel_plt();
- }
- class Stub_control
- {
- public:
- // Determine the stub group size. The group size is the absolute
- // value of the parameter --stub-group-size. If --stub-group-size
- // is passed a negative value, we restrict stubs to be always after
- // the stubbed branches.
- Stub_control(int32_t size, bool no_size_errors, bool multi_os)
- : stub_group_size_(abs(size)), stubs_always_after_branch_(size < 0),
- suppress_size_errors_(no_size_errors), multi_os_(multi_os),
- state_(NO_GROUP), group_size_(0), group_start_addr_(0),
- owner_(NULL), output_section_(NULL)
- {
- }
- // Return true iff input section can be handled by current stub
- // group.
- bool
- can_add_to_stub_group(Output_section* o,
- const Output_section::Input_section* i,
- bool has14);
- const Output_section::Input_section*
- owner()
- { return owner_; }
- Output_section*
- output_section()
- { return output_section_; }
- void
- set_output_and_owner(Output_section* o,
- const Output_section::Input_section* i)
- {
- this->output_section_ = o;
- this->owner_ = i;
- }
- private:
- typedef enum
- {
- // Initial state.
- NO_GROUP,
- // Adding group sections before the stubs.
- FINDING_STUB_SECTION,
- // Adding group sections after the stubs.
- HAS_STUB_SECTION
- } State;
- uint32_t stub_group_size_;
- bool stubs_always_after_branch_;
- bool suppress_size_errors_;
- // True if a stub group can serve multiple output sections.
- bool multi_os_;
- State state_;
- // Current max size of group. Starts at stub_group_size_ but is
- // reduced to stub_group_size_/1024 on seeing a section with
- // external conditional branches.
- uint32_t group_size_;
- uint64_t group_start_addr_;
- // owner_ and output_section_ specify the section to which stubs are
- // attached. The stubs are placed at the end of this section.
- const Output_section::Input_section* owner_;
- Output_section* output_section_;
- };
- // Return true iff input section can be handled by current stub
- // group. Sections are presented to this function in order,
- // so the first section is the head of the group.
- bool
- Stub_control::can_add_to_stub_group(Output_section* o,
- const Output_section::Input_section* i,
- bool has14)
- {
- bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
- uint64_t this_size;
- uint64_t start_addr = o->address();
- if (whole_sec)
- // .init and .fini sections are pasted together to form a single
- // function. We can't be adding stubs in the middle of the function.
- this_size = o->data_size();
- else
- {
- start_addr += i->relobj()->output_section_offset(i->shndx());
- this_size = i->data_size();
- }
- uint64_t end_addr = start_addr + this_size;
- uint32_t group_size = this->stub_group_size_;
- if (has14)
- this->group_size_ = group_size = group_size >> 10;
- if (this_size > group_size && !this->suppress_size_errors_)
- gold_warning(_("%s:%s exceeds group size"),
- i->relobj()->name().c_str(),
- i->relobj()->section_name(i->shndx()).c_str());
- gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx",
- has14 ? " 14bit" : "",
- i->relobj()->name().c_str(),
- i->relobj()->section_name(i->shndx()).c_str(),
- (long long) this_size,
- (this->state_ == NO_GROUP
- ? this_size
- : (long long) end_addr - this->group_start_addr_));
- if (this->state_ == NO_GROUP)
- {
- // Only here on very first use of Stub_control
- this->owner_ = i;
- this->output_section_ = o;
- this->state_ = FINDING_STUB_SECTION;
- this->group_size_ = group_size;
- this->group_start_addr_ = start_addr;
- return true;
- }
- else if (!this->multi_os_ && this->output_section_ != o)
- ;
- else if (this->state_ == HAS_STUB_SECTION)
- {
- // Can we add this section, which is after the stubs, to the
- // group?
- if (end_addr - this->group_start_addr_ <= this->group_size_)
- return true;
- }
- else if (this->state_ == FINDING_STUB_SECTION)
- {
- if ((whole_sec && this->output_section_ == o)
- || end_addr - this->group_start_addr_ <= this->group_size_)
- {
- // Stubs are added at the end of "owner_".
- this->owner_ = i;
- this->output_section_ = o;
- return true;
- }
- // The group before the stubs has reached maximum size.
- // Now see about adding sections after the stubs to the
- // group. If the current section has a 14-bit branch and
- // the group before the stubs exceeds group_size_ (because
- // they didn't have 14-bit branches), don't add sections
- // after the stubs: The size of stubs for such a large
- // group may exceed the reach of a 14-bit branch.
- if (!this->stubs_always_after_branch_
- && this_size <= this->group_size_
- && start_addr - this->group_start_addr_ <= this->group_size_)
- {
- gold_debug(DEBUG_TARGET, "adding after stubs");
- this->state_ = HAS_STUB_SECTION;
- this->group_start_addr_ = start_addr;
- return true;
- }
- }
- else
- gold_unreachable();
- gold_debug(DEBUG_TARGET,
- !this->multi_os_ && this->output_section_ != o
- ? "nope, new output section\n"
- : "nope, didn't fit\n");
- // The section fails to fit in the current group. Set up a few
- // things for the next group. owner_ and output_section_ will be
- // set later after we've retrieved those values for the current
- // group.
- this->state_ = FINDING_STUB_SECTION;
- this->group_size_ = group_size;
- this->group_start_addr_ = start_addr;
- return false;
- }
- // Look over all the input sections, deciding where to place stubs.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::group_sections(Layout* layout,
- const Task*,
- bool no_size_errors)
- {
- Stub_control stub_control(this->stub_group_size_, no_size_errors,
- parameters->options().stub_group_multi());
- // Group input sections and insert stub table
- Stub_table_owner* table_owner = NULL;
- std::vector<Stub_table_owner*> tables;
- Layout::Section_list section_list;
- layout->get_executable_sections(§ion_list);
- std::stable_sort(section_list.begin(), section_list.end(), Sort_sections());
- for (Layout::Section_list::iterator o = section_list.begin();
- o != section_list.end();
- ++o)
- {
- typedef Output_section::Input_section_list Input_section_list;
- for (Input_section_list::const_iterator i
- = (*o)->input_sections().begin();
- i != (*o)->input_sections().end();
- ++i)
- {
- if (i->is_input_section()
- || i->is_relaxed_input_section())
- {
- Powerpc_relobj<size, big_endian>* ppcobj = static_cast
- <Powerpc_relobj<size, big_endian>*>(i->relobj());
- bool has14 = ppcobj->has_14bit_branch(i->shndx());
- if (!stub_control.can_add_to_stub_group(*o, &*i, has14))
- {
- table_owner->output_section = stub_control.output_section();
- table_owner->owner = stub_control.owner();
- stub_control.set_output_and_owner(*o, &*i);
- table_owner = NULL;
- }
- if (table_owner == NULL)
- {
- table_owner = new Stub_table_owner;
- tables.push_back(table_owner);
- }
- ppcobj->set_stub_table(i->shndx(), tables.size() - 1);
- }
- }
- }
- if (table_owner != NULL)
- {
- table_owner->output_section = stub_control.output_section();
- table_owner->owner = stub_control.owner();;
- }
- for (typename std::vector<Stub_table_owner*>::iterator t = tables.begin();
- t != tables.end();
- ++t)
- {
- Stub_table<size, big_endian>* stub_table;
- if ((*t)->owner->is_input_section())
- stub_table = new Stub_table<size, big_endian>(this,
- (*t)->output_section,
- (*t)->owner,
- this->stub_tables_.size());
- else if ((*t)->owner->is_relaxed_input_section())
- stub_table = static_cast<Stub_table<size, big_endian>*>(
- (*t)->owner->relaxed_input_section());
- else
- gold_unreachable();
- this->stub_tables_.push_back(stub_table);
- delete *t;
- }
- }
- template<int size>
- static unsigned long
- max_branch_delta (unsigned int r_type)
- {
- if (r_type == elfcpp::R_POWERPC_REL14
- || r_type == elfcpp::R_POWERPC_REL14_BRTAKEN
- || r_type == elfcpp::R_POWERPC_REL14_BRNTAKEN)
- return 1L << 15;
- if (r_type == elfcpp::R_POWERPC_REL24
- || (size == 64 && r_type == elfcpp::R_PPC64_REL24_NOTOC)
- || r_type == elfcpp::R_PPC64_REL24_P9NOTOC
- || r_type == elfcpp::R_PPC_PLTREL24
- || r_type == elfcpp::R_PPC_LOCAL24PC)
- return 1L << 25;
- return 0;
- }
- // Return whether this branch is going via a plt call stub.
- template<int size, bool big_endian>
- bool
- Target_powerpc<size, big_endian>::Branch_info::mark_pltcall(
- Powerpc_relobj<size, big_endian>* ppc_object,
- unsigned int shndx,
- Address offset,
- Target_powerpc* target,
- Symbol_table* symtab)
- {
- if (this->object_ != ppc_object
- || this->shndx_ != shndx
- || this->offset_ != offset)
- return false;
- Symbol* sym = this->object_->global_symbol(this->r_sym_);
- if (sym != NULL && sym->is_forwarder())
- sym = symtab->resolve_forwards(sym);
- if (target->replace_tls_get_addr(sym))
- sym = target->tls_get_addr_opt();
- const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
- if (gsym != NULL
- ? (gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target))
- && !target->is_elfv2_localentry0(gsym))
- : (this->object_->local_has_plt_offset(this->r_sym_)
- && !target->is_elfv2_localentry0(this->object_, this->r_sym_)))
- {
- this->tocsave_ = 1;
- return true;
- }
- return false;
- }
- // If this branch needs a plt call stub, or a long branch stub, make one.
- template<int size, bool big_endian>
- bool
- Target_powerpc<size, big_endian>::Branch_info::make_stub(
- Stub_table<size, big_endian>* stub_table,
- Stub_table<size, big_endian>* ifunc_stub_table,
- Symbol_table* symtab) const
- {
- Symbol* sym = this->object_->global_symbol(this->r_sym_);
- Target_powerpc<size, big_endian>* target =
- static_cast<Target_powerpc<size, big_endian>*>(
- parameters->sized_target<size, big_endian>());
- if (sym != NULL && sym->is_forwarder())
- sym = symtab->resolve_forwards(sym);
- if (target->replace_tls_get_addr(sym))
- sym = target->tls_get_addr_opt();
- const Sized_symbol<size>* gsym = static_cast<const Sized_symbol<size>*>(sym);
- bool ok = true;
- if (gsym != NULL
- ? gsym->use_plt_offset(Scan::get_reference_flags(this->r_type_, target))
- : this->object_->local_has_plt_offset(this->r_sym_))
- {
- if (size == 64
- && gsym != NULL
- && target->abiversion() >= 2
- && !parameters->options().output_is_position_independent()
- && !is_branch_reloc<size>(this->r_type_))
- target->glink_section()->add_global_entry(gsym);
- else
- {
- if (stub_table == NULL
- && !(size == 32
- && gsym != NULL
- && !parameters->options().output_is_position_independent()
- && !is_branch_reloc<size>(this->r_type_)))
- stub_table = this->object_->stub_table(this->shndx_);
- if (stub_table == NULL)
- {
- // This is a ref from a data section to an ifunc symbol,
- // or a non-branch reloc for which we always want to use
- // one set of stubs for resolving function addresses.
- stub_table = ifunc_stub_table;
- }
- gold_assert(stub_table != NULL);
- Address from = this->object_->get_output_section_offset(this->shndx_);
- if (from != invalid_address)
- from += (this->object_->output_section(this->shndx_)->address()
- + this->offset_);
- if (gsym != NULL)
- ok = stub_table->add_plt_call_entry(from,
- this->object_, gsym,
- this->r_type_, this->addend_,
- this->tocsave_);
- else
- ok = stub_table->add_plt_call_entry(from,
- this->object_, this->r_sym_,
- this->r_type_, this->addend_,
- this->tocsave_);
- }
- }
- else
- {
- Address max_branch_offset = max_branch_delta<size>(this->r_type_);
- if (max_branch_offset == 0)
- return true;
- Address from = this->object_->get_output_section_offset(this->shndx_);
- gold_assert(from != invalid_address);
- from += (this->object_->output_section(this->shndx_)->address()
- + this->offset_);
- Address to;
- unsigned int other = 0;
- if (gsym != NULL)
- {
- switch (gsym->source())
- {
- case Symbol::FROM_OBJECT:
- {
- Object* symobj = gsym->object();
- if (symobj->is_dynamic()
- || symobj->pluginobj() != NULL)
- return true;
- bool is_ordinary;
- unsigned int shndx = gsym->shndx(&is_ordinary);
- if (shndx == elfcpp::SHN_UNDEF)
- return true;
- }
- break;
- case Symbol::IS_UNDEFINED:
- return true;
- default:
- break;
- }
- Symbol_table::Compute_final_value_status status;
- to = symtab->compute_final_value<size>(gsym, &status);
- if (status != Symbol_table::CFVS_OK)
- return true;
- if (size == 64)
- other = gsym->nonvis() >> 3;
- }
- else
- {
- const Symbol_value<size>* psymval
- = this->object_->local_symbol(this->r_sym_);
- Symbol_value<size> symval;
- if (psymval->is_section_symbol())
- symval.set_is_section_symbol();
- typedef Sized_relobj_file<size, big_endian> ObjType;
- typename ObjType::Compute_final_local_value_status status
- = this->object_->compute_final_local_value(this->r_sym_, psymval,
- &symval, symtab);
- if (status != ObjType::CFLV_OK
- || !symval.has_output_value())
- return true;
- to = symval.value(this->object_, 0);
- if (size == 64)
- other = this->object_->st_other(this->r_sym_) >> 5;
- }
- if (!(size == 32 && this->r_type_ == elfcpp::R_PPC_PLTREL24))
- to += this->addend_;
- if (stub_table == NULL)
- stub_table = this->object_->stub_table(this->shndx_);
- if (size == 64 && target->abiversion() < 2)
- {
- unsigned int dest_shndx;
- if (!target->symval_for_branch(symtab, gsym, this->object_,
- &to, &dest_shndx))
- return true;
- }
- unsigned int local_ent = 0;
- if (size == 64
- && this->r_type_ != elfcpp::R_PPC64_REL24_NOTOC
- && this->r_type_ != elfcpp::R_PPC64_REL24_P9NOTOC)
- local_ent = elfcpp::ppc64_decode_local_entry(other);
- Address delta = to + local_ent - from;
- if (delta + max_branch_offset >= 2 * max_branch_offset
- || (size == 64
- && (this->r_type_ == elfcpp::R_PPC64_REL24_NOTOC
- || this->r_type_ == elfcpp::R_PPC64_REL24_P9NOTOC)
- && (gsym != NULL
- ? this->object_->ppc64_needs_toc(gsym)
- : this->object_->ppc64_needs_toc(this->r_sym_))))
- {
- if (stub_table == NULL)
- {
- gold_warning(_("%s:%s: branch in non-executable section,"
- " no long branch stub for you"),
- this->object_->name().c_str(),
- this->object_->section_name(this->shndx_).c_str());
- return true;
- }
- bool save_res = (size == 64
- && gsym != NULL
- && gsym->source() == Symbol::IN_OUTPUT_DATA
- && gsym->output_data() == target->savres_section());
- ok = stub_table->add_long_branch_entry(this->r_type_,
- from, to, other, save_res);
- }
- }
- if (!ok)
- gold_debug(DEBUG_TARGET,
- "branch at %s:%s+%#lx\n"
- "can't reach stub attached to %s:%s",
- this->object_->name().c_str(),
- this->object_->section_name(this->shndx_).c_str(),
- (unsigned long) this->offset_,
- stub_table->relobj()->name().c_str(),
- stub_table->relobj()->section_name(stub_table->shndx()).c_str());
- return ok;
- }
- // Relaxation hook. This is where we do stub generation.
- template<int size, bool big_endian>
- bool
- Target_powerpc<size, big_endian>::do_relax(int pass,
- const Input_objects*,
- Symbol_table* symtab,
- Layout* layout,
- const Task* task)
- {
- unsigned int prev_brlt_size = 0;
- if (pass == 1)
- {
- bool thread_safe
- = this->abiversion() < 2 && parameters->options().plt_thread_safe();
- if (size == 64
- && this->abiversion() < 2
- && !thread_safe
- && !parameters->options().user_set_plt_thread_safe())
- {
- static const char* const thread_starter[] =
- {
- "pthread_create",
- /* libstdc++ */
- "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE",
- /* librt */
- "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio",
- "mq_notify", "create_timer",
- /* libanl */
- "getaddrinfo_a",
- /* libgomp */
- "GOMP_parallel",
- "GOMP_parallel_start",
- "GOMP_parallel_loop_static",
- "GOMP_parallel_loop_static_start",
- "GOMP_parallel_loop_dynamic",
- "GOMP_parallel_loop_dynamic_start",
- "GOMP_parallel_loop_guided",
- "GOMP_parallel_loop_guided_start",
- "GOMP_parallel_loop_runtime",
- "GOMP_parallel_loop_runtime_start",
- "GOMP_parallel_sections",
- "GOMP_parallel_sections_start",
- /* libgo */
- "__go_go",
- };
- if (parameters->options().shared())
- thread_safe = true;
- else
- {
- for (unsigned int i = 0;
- i < sizeof(thread_starter) / sizeof(thread_starter[0]);
- i++)
- {
- Symbol* sym = symtab->lookup(thread_starter[i], NULL);
- thread_safe = (sym != NULL
- && sym->in_reg()
- && sym->in_real_elf());
- if (thread_safe)
- break;
- }
- }
- }
- this->plt_thread_safe_ = thread_safe;
- }
- if (pass == 1)
- {
- this->stub_group_size_ = parameters->options().stub_group_size();
- bool no_size_errors = true;
- if (this->stub_group_size_ == 1)
- this->stub_group_size_ = 0x1c00000;
- else if (this->stub_group_size_ == -1)
- this->stub_group_size_ = -0x1e00000;
- else
- no_size_errors = false;
- this->group_sections(layout, task, no_size_errors);
- }
- else if (this->relax_failed_ && this->relax_fail_count_ < 3)
- {
- this->branch_lookup_table_.clear();
- for (typename Stub_tables::iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- {
- (*p)->clear_stubs(true);
- }
- this->stub_tables_.clear();
- this->stub_group_size_ = this->stub_group_size_ / 4 * 3;
- gold_info(_("%s: stub group size is too large; retrying with %#x"),
- program_name, this->stub_group_size_);
- this->group_sections(layout, task, true);
- }
- // We need address of stub tables valid for make_stub.
- for (typename Stub_tables::iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- {
- const Powerpc_relobj<size, big_endian>* object
- = static_cast<const Powerpc_relobj<size, big_endian>*>((*p)->relobj());
- Address off = object->get_output_section_offset((*p)->shndx());
- gold_assert(off != invalid_address);
- Output_section* os = (*p)->output_section();
- (*p)->set_address_and_size(os, off);
- }
- if (pass != 1)
- {
- // Clear plt call stubs, long branch stubs and branch lookup table.
- prev_brlt_size = this->branch_lookup_table_.size();
- this->branch_lookup_table_.clear();
- for (typename Stub_tables::iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- {
- (*p)->clear_stubs(false);
- }
- }
- // Build all the stubs.
- this->relax_failed_ = false;
- Stub_table<size, big_endian>* ifunc_stub_table
- = this->stub_tables_.size() == 0 ? NULL : this->stub_tables_[0];
- Stub_table<size, big_endian>* one_stub_table
- = this->stub_tables_.size() != 1 ? NULL : ifunc_stub_table;
- for (typename Branches::const_iterator b = this->branch_info_.begin();
- b != this->branch_info_.end();
- b++)
- {
- if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab)
- && !this->relax_failed_)
- {
- this->relax_failed_ = true;
- this->relax_fail_count_++;
- if (this->relax_fail_count_ < 3)
- return true;
- }
- }
- bool do_resize = false;
- for (typename Stub_tables::iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- if ((*p)->need_resize())
- {
- do_resize = true;
- break;
- }
- if (do_resize)
- {
- this->branch_lookup_table_.clear();
- for (typename Stub_tables::iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- (*p)->set_resizing(true);
- for (typename Branches::const_iterator b = this->branch_info_.begin();
- b != this->branch_info_.end();
- b++)
- {
- if (!b->make_stub(one_stub_table, ifunc_stub_table, symtab)
- && !this->relax_failed_)
- {
- this->relax_failed_ = true;
- this->relax_fail_count_++;
- if (this->relax_fail_count_ < 3)
- return true;
- }
- }
- for (typename Stub_tables::iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- (*p)->set_resizing(false);
- }
- // Did anything change size?
- unsigned int num_huge_branches = this->branch_lookup_table_.size();
- bool again = num_huge_branches != prev_brlt_size;
- if (size == 64 && num_huge_branches != 0)
- this->make_brlt_section(layout);
- if (size == 64 && again)
- this->brlt_section_->set_current_size(num_huge_branches);
- for (typename Stub_tables::reverse_iterator p = this->stub_tables_.rbegin();
- p != this->stub_tables_.rend();
- ++p)
- (*p)->remove_eh_frame(layout);
- for (typename Stub_tables::iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- (*p)->add_eh_frame(layout);
- typedef Unordered_set<Output_section*> Output_sections;
- Output_sections os_need_update;
- for (typename Stub_tables::iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- {
- if ((*p)->size_update())
- {
- again = true;
- os_need_update.insert((*p)->output_section());
- }
- }
- // Set output section offsets for all input sections in an output
- // section that just changed size. Anything past the stubs will
- // need updating.
- for (typename Output_sections::iterator p = os_need_update.begin();
- p != os_need_update.end();
- p++)
- {
- Output_section* os = *p;
- Address off = 0;
- typedef Output_section::Input_section_list Input_section_list;
- for (Input_section_list::const_iterator i = os->input_sections().begin();
- i != os->input_sections().end();
- ++i)
- {
- off = align_address(off, i->addralign());
- if (i->is_input_section() || i->is_relaxed_input_section())
- i->relobj()->set_section_offset(i->shndx(), off);
- if (i->is_relaxed_input_section())
- {
- Stub_table<size, big_endian>* stub_table
- = static_cast<Stub_table<size, big_endian>*>(
- i->relaxed_input_section());
- Address stub_table_size = stub_table->set_address_and_size(os, off);
- off += stub_table_size;
- // After a few iterations, set current stub table size
- // as min size threshold, so later stub tables can only
- // grow in size.
- if (pass >= 4)
- stub_table->set_min_size_threshold(stub_table_size);
- }
- else
- off += i->data_size();
- }
- // If .branch_lt is part of this output section, then we have
- // just done the offset adjustment.
- os->clear_section_offsets_need_adjustment();
- }
- if (size == 64
- && !again
- && num_huge_branches != 0
- && parameters->options().output_is_position_independent())
- {
- // Fill in the BRLT relocs.
- this->brlt_section_->reset_brlt_sizes();
- for (typename Branch_lookup_table::const_iterator p
- = this->branch_lookup_table_.begin();
- p != this->branch_lookup_table_.end();
- ++p)
- {
- this->brlt_section_->add_reloc(p->first, p->second);
- }
- this->brlt_section_->finalize_brlt_sizes();
- }
- if (!again
- && (parameters->options().user_set_emit_stub_syms()
- ? parameters->options().emit_stub_syms()
- : (size == 64
- || parameters->options().output_is_position_independent()
- || parameters->options().emit_relocs())))
- {
- for (typename Stub_tables::iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- (*p)->define_stub_syms(symtab);
- if (this->glink_ != NULL)
- {
- int stub_size = this->glink_->pltresolve_size();
- Address value = -stub_size;
- if (size == 64)
- {
- value = 8;
- stub_size -= 8;
- }
- this->define_local(symtab, "__glink_PLTresolve",
- this->glink_, value, stub_size);
- if (size != 64)
- this->define_local(symtab, "__glink", this->glink_, 0, 0);
- }
- }
- return again;
- }
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::do_plt_fde_location(const Output_data* plt,
- unsigned char* oview,
- uint64_t* paddress,
- off_t* plen) const
- {
- uint64_t address = plt->address();
- off_t len = plt->data_size();
- if (plt == this->glink_)
- {
- // See Output_data_glink::do_write() for glink contents.
- if (len == 0)
- {
- // Static linking may need stubs, to support ifunc and long
- // branches. We need to create an output section for
- // .eh_frame early in the link process, to have a place to
- // attach stub .eh_frame info. We also need to have
- // registered a CIE that matches the stub CIE. Both of
- // these requirements are satisfied by creating an FDE and
- // CIE for .glink, even though static linking will leave
- // .glink zero length.
- // ??? Hopefully generating an FDE with a zero address range
- // won't confuse anything that consumes .eh_frame info.
- }
- else if (size == 64)
- {
- // There is one word before __glink_PLTresolve
- address += 8;
- len -= 8;
- }
- else if (parameters->options().output_is_position_independent())
- {
- // There are two FDEs for a position independent glink.
- // The first covers the branch table, the second
- // __glink_PLTresolve at the end of glink.
- off_t resolve_size = this->glink_->pltresolve_size();
- if (oview[9] == elfcpp::DW_CFA_nop)
- len -= resolve_size;
- else
- {
- address += len - resolve_size;
- len = resolve_size;
- }
- }
- }
- else
- {
- // Must be a stub table.
- const Stub_table<size, big_endian>* stub_table
- = static_cast<const Stub_table<size, big_endian>*>(plt);
- uint64_t stub_address = stub_table->stub_address();
- len -= stub_address - address;
- address = stub_address;
- }
- *paddress = address;
- *plen = len;
- }
- // A class to handle the PLT data.
- template<int size, bool big_endian>
- class Output_data_plt_powerpc : public Output_section_data_build
- {
- public:
- typedef Output_data_reloc<elfcpp::SHT_RELA, true,
- size, big_endian> Reloc_section;
- Output_data_plt_powerpc(Target_powerpc<size, big_endian>* targ,
- Symbol_table* symtab,
- Reloc_section* plt_rel,
- const char* name)
- : Output_section_data_build(size == 32 ? 4 : 8),
- rel_(plt_rel), targ_(targ), symtab_(symtab), name_(name), sym_ents_()
- { }
- // Add an entry to the PLT.
- void
- add_entry(Symbol*, bool = false);
- void
- add_ifunc_entry(Symbol*);
- void
- add_local_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
- void
- add_local_ifunc_entry(Sized_relobj_file<size, big_endian>*, unsigned int);
- // Return the .rela.plt section data.
- Reloc_section*
- rel_plt() const
- {
- return this->rel_;
- }
- // Return the number of PLT entries.
- unsigned int
- entry_count() const
- {
- if (this->current_data_size() == 0)
- return 0;
- return ((this->current_data_size() - this->first_plt_entry_offset())
- / this->plt_entry_size());
- }
- 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, this->name_); }
- private:
- struct Local_plt_ent
- {
- Local_plt_ent(Sized_relobj_file<size, big_endian>* obj, unsigned int rsym)
- { rsym_ = rsym; u.obj_ = obj; }
- Local_plt_ent(Symbol* sym)
- { rsym_ = -1u; u.gsym_ = sym; }
- ~Local_plt_ent()
- { }
- unsigned int rsym_;
- union
- {
- Sized_relobj_file<size, big_endian>* obj_;
- Symbol* gsym_;
- } u;
- };
- // Return the offset of the first non-reserved PLT entry.
- unsigned int
- first_plt_entry_offset() const
- {
- // IPLT and LPLT have no reserved entry.
- if (this->name_[3] == 'I' || this->name_[3] == 'L')
- return 0;
- return this->targ_->first_plt_entry_offset();
- }
- // Return the size of each PLT entry.
- unsigned int
- plt_entry_size() const
- {
- return this->targ_->plt_entry_size();
- }
- // Write out the PLT data.
- void
- do_write(Output_file*);
- // The reloc section.
- Reloc_section* rel_;
- // Allows access to .glink for do_write.
- Target_powerpc<size, big_endian>* targ_;
- Symbol_table* symtab_;
- // What to report in map file.
- const char *name_;
- std::vector<Local_plt_ent> sym_ents_;
- };
- // Add an entry to the PLT.
- template<int size, bool big_endian>
- void
- Output_data_plt_powerpc<size, big_endian>::add_entry(Symbol* gsym,
- bool stash)
- {
- if (!gsym->has_plt_offset())
- {
- section_size_type off = this->current_data_size();
- if (off == 0)
- off += this->first_plt_entry_offset();
- gsym->set_plt_offset(off);
- if (this->rel_)
- {
- gsym->set_needs_dynsym_entry();
- unsigned int dynrel = elfcpp::R_POWERPC_JMP_SLOT;
- this->rel_->add_global(gsym, dynrel, this, off, 0);
- }
- off += this->plt_entry_size();
- this->set_current_data_size(off);
- if (stash)
- {
- Local_plt_ent sym(gsym);
- this->sym_ents_.push_back(sym);
- }
- }
- }
- // Add an entry for a global ifunc symbol that resolves locally, to the IPLT.
- template<int size, bool big_endian>
- void
- Output_data_plt_powerpc<size, big_endian>::add_ifunc_entry(Symbol* gsym)
- {
- if (!gsym->has_plt_offset())
- {
- section_size_type off = this->current_data_size();
- gsym->set_plt_offset(off);
- unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
- if (size == 64 && this->targ_->abiversion() < 2)
- dynrel = elfcpp::R_PPC64_JMP_IREL;
- this->rel_->add_symbolless_global_addend(gsym, dynrel, this, off, 0);
- off += this->plt_entry_size();
- this->set_current_data_size(off);
- }
- }
- // Add an entry for a local symbol to the PLT.
- template<int size, bool big_endian>
- void
- Output_data_plt_powerpc<size, big_endian>::add_local_entry(
- Sized_relobj_file<size, big_endian>* relobj,
- unsigned int local_sym_index)
- {
- if (!relobj->local_has_plt_offset(local_sym_index))
- {
- section_size_type off = this->current_data_size();
- relobj->set_local_plt_offset(local_sym_index, off);
- if (this->rel_)
- {
- unsigned int dynrel = elfcpp::R_POWERPC_RELATIVE;
- if (size == 64 && this->targ_->abiversion() < 2)
- dynrel = elfcpp::R_POWERPC_JMP_SLOT;
- this->rel_->add_symbolless_local_addend(relobj, local_sym_index,
- dynrel, this, off, 0);
- }
- off += this->plt_entry_size();
- this->set_current_data_size(off);
- Local_plt_ent sym(relobj, local_sym_index);
- this->sym_ents_.push_back(sym);
- }
- }
- // Add an entry for a local ifunc symbol to the IPLT.
- template<int size, bool big_endian>
- void
- Output_data_plt_powerpc<size, big_endian>::add_local_ifunc_entry(
- Sized_relobj_file<size, big_endian>* relobj,
- unsigned int local_sym_index)
- {
- if (!relobj->local_has_plt_offset(local_sym_index))
- {
- section_size_type off = this->current_data_size();
- relobj->set_local_plt_offset(local_sym_index, off);
- unsigned int dynrel = elfcpp::R_POWERPC_IRELATIVE;
- if (size == 64 && this->targ_->abiversion() < 2)
- dynrel = elfcpp::R_PPC64_JMP_IREL;
- this->rel_->add_symbolless_local_addend(relobj, local_sym_index, dynrel,
- this, off, 0);
- off += this->plt_entry_size();
- this->set_current_data_size(off);
- }
- }
- static const uint32_t add_0_11_11 = 0x7c0b5a14;
- static const uint32_t add_2_2_11 = 0x7c425a14;
- static const uint32_t add_2_2_12 = 0x7c426214;
- static const uint32_t add_3_3_2 = 0x7c631214;
- static const uint32_t add_3_3_13 = 0x7c636a14;
- static const uint32_t add_3_12_2 = 0x7c6c1214;
- static const uint32_t add_3_12_13 = 0x7c6c6a14;
- static const uint32_t add_11_0_11 = 0x7d605a14;
- static const uint32_t add_11_2_11 = 0x7d625a14;
- static const uint32_t add_11_11_2 = 0x7d6b1214;
- static const uint32_t add_12_11_12 = 0x7d8b6214;
- static const uint32_t addi_0_12 = 0x380c0000;
- static const uint32_t addi_2_2 = 0x38420000;
- static const uint32_t addi_3_3 = 0x38630000;
- static const uint32_t addi_11_11 = 0x396b0000;
- static const uint32_t addi_12_1 = 0x39810000;
- static const uint32_t addi_12_11 = 0x398b0000;
- static const uint32_t addi_12_12 = 0x398c0000;
- static const uint32_t addis_0_2 = 0x3c020000;
- static const uint32_t addis_0_13 = 0x3c0d0000;
- static const uint32_t addis_2_12 = 0x3c4c0000;
- static const uint32_t addis_11_2 = 0x3d620000;
- static const uint32_t addis_11_11 = 0x3d6b0000;
- static const uint32_t addis_11_30 = 0x3d7e0000;
- static const uint32_t addis_12_1 = 0x3d810000;
- static const uint32_t addis_12_2 = 0x3d820000;
- static const uint32_t addis_12_11 = 0x3d8b0000;
- static const uint32_t addis_12_12 = 0x3d8c0000;
- static const uint32_t b = 0x48000000;
- static const uint32_t bcl_20_31 = 0x429f0005;
- static const uint32_t bctr = 0x4e800420;
- static const uint32_t bctrl = 0x4e800421;
- static const uint32_t beqlr = 0x4d820020;
- static const uint32_t blr = 0x4e800020;
- static const uint32_t bnectr_p4 = 0x4ce20420;
- static const uint32_t cmpld_7_12_0 = 0x7fac0040;
- static const uint32_t cmpldi_2_0 = 0x28220000;
- static const uint32_t cmpdi_11_0 = 0x2c2b0000;
- static const uint32_t cmpwi_11_0 = 0x2c0b0000;
- static const uint32_t cror_15_15_15 = 0x4def7b82;
- static const uint32_t cror_31_31_31 = 0x4ffffb82;
- static const uint32_t ld_0_1 = 0xe8010000;
- static const uint32_t ld_0_11 = 0xe80b0000;
- static const uint32_t ld_0_12 = 0xe80c0000;
- static const uint32_t ld_2_1 = 0xe8410000;
- static const uint32_t ld_2_2 = 0xe8420000;
- static const uint32_t ld_2_11 = 0xe84b0000;
- static const uint32_t ld_2_12 = 0xe84c0000;
- static const uint32_t ld_11_1 = 0xe9610000;
- static const uint32_t ld_11_2 = 0xe9620000;
- static const uint32_t ld_11_3 = 0xe9630000;
- static const uint32_t ld_11_11 = 0xe96b0000;
- static const uint32_t ld_12_2 = 0xe9820000;
- static const uint32_t ld_12_3 = 0xe9830000;
- static const uint32_t ld_12_11 = 0xe98b0000;
- static const uint32_t ld_12_12 = 0xe98c0000;
- static const uint32_t ldx_12_11_12 = 0x7d8b602a;
- static const uint32_t lfd_0_1 = 0xc8010000;
- static const uint32_t li_0_0 = 0x38000000;
- static const uint32_t li_11_0 = 0x39600000;
- static const uint32_t li_12_0 = 0x39800000;
- static const uint32_t lis_0 = 0x3c000000;
- static const uint32_t lis_2 = 0x3c400000;
- static const uint32_t lis_11 = 0x3d600000;
- static const uint32_t lis_12 = 0x3d800000;
- static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
- static const uint32_t lwz_0_12 = 0x800c0000;
- static const uint32_t lwz_11_3 = 0x81630000;
- static const uint32_t lwz_11_11 = 0x816b0000;
- static const uint32_t lwz_11_30 = 0x817e0000;
- static const uint32_t lwz_12_3 = 0x81830000;
- static const uint32_t lwz_12_12 = 0x818c0000;
- static const uint32_t lwzu_0_12 = 0x840c0000;
- static const uint32_t mflr_0 = 0x7c0802a6;
- static const uint32_t mflr_11 = 0x7d6802a6;
- static const uint32_t mflr_12 = 0x7d8802a6;
- static const uint32_t mr_0_3 = 0x7c601b78;
- static const uint32_t mr_3_0 = 0x7c030378;
- static const uint32_t mtctr_0 = 0x7c0903a6;
- static const uint32_t mtctr_11 = 0x7d6903a6;
- static const uint32_t mtctr_12 = 0x7d8903a6;
- static const uint32_t mtlr_0 = 0x7c0803a6;
- static const uint32_t mtlr_11 = 0x7d6803a6;
- static const uint32_t mtlr_12 = 0x7d8803a6;
- static const uint32_t nop = 0x60000000;
- static const uint32_t ori_0_0_0 = 0x60000000;
- static const uint32_t ori_11_11_0 = 0x616b0000;
- static const uint32_t ori_12_12_0 = 0x618c0000;
- static const uint32_t oris_12_12_0 = 0x658c0000;
- static const uint32_t sldi_11_11_34 = 0x796b1746;
- static const uint32_t sldi_12_12_32 = 0x799c07c6;
- static const uint32_t srdi_0_0_2 = 0x7800f082;
- static const uint32_t std_0_1 = 0xf8010000;
- static const uint32_t std_0_12 = 0xf80c0000;
- static const uint32_t std_2_1 = 0xf8410000;
- static const uint32_t std_11_1 = 0xf9610000;
- static const uint32_t stfd_0_1 = 0xd8010000;
- static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
- static const uint32_t sub_11_11_12 = 0x7d6c5850;
- static const uint32_t sub_12_12_11 = 0x7d8b6050;
- static const uint32_t xor_2_12_12 = 0x7d826278;
- static const uint32_t xor_11_12_12 = 0x7d8b6278;
- static const uint64_t paddi_12_pc = 0x0610000039800000ULL;
- static const uint64_t pld_12_pc = 0x04100000e5800000ULL;
- static const uint64_t pnop = 0x0700000000000000ULL;
- // Write out the PLT.
- template<int size, bool big_endian>
- void
- Output_data_plt_powerpc<size, big_endian>::do_write(Output_file* of)
- {
- if (!this->sym_ents_.empty())
- {
- const section_size_type 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);
- unsigned char* pov = oview;
- unsigned char* endpov = oview + oview_size;
- for (typename std::vector<Local_plt_ent>::iterator e
- = this->sym_ents_.begin();
- e != this->sym_ents_.end();
- e++)
- {
- typename elfcpp::Elf_types<size>::Elf_Addr val;
- Sized_symbol<size>* gsym = NULL;
- Powerpc_relobj<size, big_endian>* obj = NULL;
- if (e->rsym_ == -1u)
- {
- gsym = static_cast<Sized_symbol<size>*>(e->u.gsym_);
- val = gsym->value();
- }
- else
- {
- obj = static_cast<Powerpc_relobj<size, big_endian>*>(e->u.obj_);
- val = obj->local_symbol(e->rsym_)->value(obj, 0);
- }
- if (this->targ_->abiversion() >= 2)
- {
- elfcpp::Swap<size, big_endian>::writeval(pov, val);
- pov += size / 8;
- }
- else
- {
- unsigned int shndx;
- this->targ_->symval_for_branch(this->symtab_, gsym, obj,
- &val, &shndx);
- elfcpp::Swap<size, big_endian>::writeval(pov, val);
- pov += size / 8;
- val = this->targ_->toc_pointer();
- elfcpp::Swap<size, big_endian>::writeval(pov, val);
- pov += size / 8;
- if (this->plt_entry_size() > 16)
- {
- elfcpp::Swap<size, big_endian>::writeval(pov, 0);
- pov += size / 8;
- }
- }
- }
- gold_assert(pov == endpov);
- }
- if (size == 32 && (this->name_[3] != 'I' && this->name_[3] != 'L'))
- {
- const section_size_type 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);
- unsigned char* pov = oview;
- unsigned char* endpov = oview + oview_size;
- // The address of the .glink branch table
- const Output_data_glink<size, big_endian>* glink
- = this->targ_->glink_section();
- elfcpp::Elf_types<32>::Elf_Addr branch_tab = glink->address();
- while (pov < endpov)
- {
- elfcpp::Swap<32, big_endian>::writeval(pov, branch_tab);
- pov += 4;
- branch_tab += 4;
- }
- of->write_output_view(offset, oview_size, oview);
- }
- }
- // Create the PLT section.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::make_plt_section(Symbol_table* symtab,
- Layout* layout)
- {
- if (this->plt_ == NULL)
- {
- if (this->got_ == NULL)
- this->got_section(symtab, layout, GOT_TYPE_SMALL);
- if (this->glink_ == NULL)
- make_glink_section(layout);
- // Ensure that .rela.dyn always appears before .rela.plt This is
- // necessary due to how, on PowerPC and some other targets, .rela.dyn
- // needs to include .rela.plt in its range.
- this->rela_dyn_section(layout);
- Reloc_section* plt_rel = new Reloc_section(false);
- layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
- elfcpp::SHF_ALLOC, plt_rel,
- ORDER_DYNAMIC_PLT_RELOCS, false);
- this->plt_
- = new Output_data_plt_powerpc<size, big_endian>(this, symtab, plt_rel,
- "** PLT");
- layout->add_output_section_data(".plt",
- (size == 32
- ? elfcpp::SHT_PROGBITS
- : elfcpp::SHT_NOBITS),
- elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
- this->plt_,
- (size == 32
- ? ORDER_SMALL_DATA
- : ORDER_SMALL_BSS),
- false);
- Output_section* rela_plt_os = plt_rel->output_section();
- rela_plt_os->set_info_section(this->plt_->output_section());
- }
- }
- // Create the IPLT section.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::make_iplt_section(Symbol_table* symtab,
- Layout* layout)
- {
- if (this->iplt_ == NULL)
- {
- this->make_plt_section(symtab, layout);
- this->make_lplt_section(symtab, layout);
- Reloc_section* iplt_rel = new Reloc_section(false);
- if (this->rela_dyn_->output_section())
- this->rela_dyn_->output_section()->add_output_section_data(iplt_rel);
- this->iplt_
- = new Output_data_plt_powerpc<size, big_endian>(this, symtab, iplt_rel,
- "** IPLT");
- if (this->plt_->output_section())
- this->plt_->output_section()->add_output_section_data(this->iplt_);
- }
- }
- // Create the LPLT section.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::make_lplt_section(Symbol_table* symtab,
- Layout* layout)
- {
- if (this->lplt_ == NULL)
- {
- Reloc_section* lplt_rel = NULL;
- if (parameters->options().output_is_position_independent())
- {
- lplt_rel = new Reloc_section(false);
- this->rela_dyn_section(layout);
- if (this->rela_dyn_->output_section())
- this->rela_dyn_->output_section()
- ->add_output_section_data(lplt_rel);
- }
- this->lplt_
- = new Output_data_plt_powerpc<size, big_endian>(this, symtab, lplt_rel,
- "** LPLT");
- this->make_brlt_section(layout);
- if (this->brlt_section_ && this->brlt_section_->output_section())
- this->brlt_section_->output_section()
- ->add_output_section_data(this->lplt_);
- else
- layout->add_output_section_data(".branch_lt",
- elfcpp::SHT_PROGBITS,
- elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
- this->lplt_,
- ORDER_RELRO,
- true);
- }
- }
- // A section for huge long branch addresses, similar to plt section.
- template<int size, bool big_endian>
- class Output_data_brlt_powerpc : public Output_section_data_build
- {
- public:
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- typedef Output_data_reloc<elfcpp::SHT_RELA, true,
- size, big_endian> Reloc_section;
- Output_data_brlt_powerpc(Target_powerpc<size, big_endian>* targ,
- Reloc_section* brlt_rel)
- : Output_section_data_build(size == 32 ? 4 : 8),
- rel_(brlt_rel),
- targ_(targ)
- { }
- void
- reset_brlt_sizes()
- {
- this->reset_data_size();
- this->rel_->reset_data_size();
- }
- void
- finalize_brlt_sizes()
- {
- this->finalize_data_size();
- this->rel_->finalize_data_size();
- }
- // Add a reloc for an entry in the BRLT.
- void
- add_reloc(Address to, unsigned int off)
- { this->rel_->add_relative(elfcpp::R_POWERPC_RELATIVE, this, off, to); }
- // Update section and reloc section size.
- void
- set_current_size(unsigned int num_branches)
- {
- this->reset_address_and_file_offset();
- this->set_current_data_size(num_branches * 16);
- this->finalize_data_size();
- Output_section* os = this->output_section();
- os->set_section_offsets_need_adjustment();
- if (this->rel_ != NULL)
- {
- const unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- this->rel_->reset_address_and_file_offset();
- this->rel_->set_current_data_size(num_branches * reloc_size);
- this->rel_->finalize_data_size();
- Output_section* os = this->rel_->output_section();
- os->set_section_offsets_need_adjustment();
- }
- }
- 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, "** BRLT"); }
- private:
- // Write out the BRLT data.
- void
- do_write(Output_file*);
- // The reloc section.
- Reloc_section* rel_;
- Target_powerpc<size, big_endian>* targ_;
- };
- // Make the branch lookup table section.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::make_brlt_section(Layout* layout)
- {
- if (size == 64 && this->brlt_section_ == NULL)
- {
- Reloc_section* brlt_rel = NULL;
- bool is_pic = parameters->options().output_is_position_independent();
- if (is_pic)
- {
- // When PIC we can't fill in .branch_lt but must initialise at
- // runtime via dynamic relocations.
- this->rela_dyn_section(layout);
- brlt_rel = new Reloc_section(false);
- if (this->rela_dyn_->output_section())
- this->rela_dyn_->output_section()
- ->add_output_section_data(brlt_rel);
- }
- this->brlt_section_
- = new Output_data_brlt_powerpc<size, big_endian>(this, brlt_rel);
- if (this->plt_ && is_pic && this->plt_->output_section())
- this->plt_->output_section()
- ->add_output_section_data(this->brlt_section_);
- else
- layout->add_output_section_data(".branch_lt",
- elfcpp::SHT_PROGBITS,
- elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
- this->brlt_section_,
- ORDER_RELRO,
- true);
- }
- }
- // Write out .branch_lt when non-PIC.
- template<int size, bool big_endian>
- void
- Output_data_brlt_powerpc<size, big_endian>::do_write(Output_file* of)
- {
- if (size == 64 && !parameters->options().output_is_position_independent())
- {
- const section_size_type 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);
- this->targ_->write_branch_lookup_table(oview);
- of->write_output_view(offset, oview_size, oview);
- }
- }
- static inline uint32_t
- l(uint32_t a)
- {
- return a & 0xffff;
- }
- static inline uint32_t
- hi(uint32_t a)
- {
- return l(a >> 16);
- }
- static inline uint32_t
- ha(uint32_t a)
- {
- return hi(a + 0x8000);
- }
- static inline uint64_t
- d34(uint64_t v)
- {
- return ((v & 0x3ffff0000ULL) << 16) | (v & 0xffff);
- }
- static inline uint64_t
- ha34(uint64_t v)
- {
- return (v + (1ULL << 33)) >> 34;
- }
- template<int size>
- struct Eh_cie
- {
- static const unsigned char eh_frame_cie[12];
- };
- template<int size>
- const unsigned char Eh_cie<size>::eh_frame_cie[] =
- {
- 1, // CIE version.
- 'z', 'R', 0, // Augmentation string.
- 4, // Code alignment.
- 0x80 - size / 8 , // Data alignment.
- 65, // RA reg.
- 1, // Augmentation size.
- (elfcpp::DW_EH_PE_pcrel
- | elfcpp::DW_EH_PE_sdata4), // FDE encoding.
- elfcpp::DW_CFA_def_cfa, 1, 0 // def_cfa: r1 offset 0.
- };
- // Describe __glink_PLTresolve use of LR, 64-bit version ABIv1.
- static const unsigned char glink_eh_frame_fde_64v1[] =
- {
- 0, 0, 0, 0, // Replaced with offset to .glink.
- 0, 0, 0, 0, // Replaced with size of .glink.
- 0, // Augmentation size.
- elfcpp::DW_CFA_advance_loc + 2,
- elfcpp::DW_CFA_register, 65, 12,
- elfcpp::DW_CFA_advance_loc + 4,
- elfcpp::DW_CFA_restore_extended, 65
- };
- // Describe __glink_PLTresolve use of LR, 64-bit version ABIv2.
- static const unsigned char glink_eh_frame_fde_64v2[] =
- {
- 0, 0, 0, 0, // Replaced with offset to .glink.
- 0, 0, 0, 0, // Replaced with size of .glink.
- 0, // Augmentation size.
- elfcpp::DW_CFA_advance_loc + 2,
- elfcpp::DW_CFA_register, 65, 0,
- elfcpp::DW_CFA_advance_loc + 2,
- elfcpp::DW_CFA_restore_extended, 65
- };
- static const unsigned char glink_eh_frame_fde_64v2_localentry0[] =
- {
- 0, 0, 0, 0, // Replaced with offset to .glink.
- 0, 0, 0, 0, // Replaced with size of .glink.
- 0, // Augmentation size.
- elfcpp::DW_CFA_advance_loc + 3,
- elfcpp::DW_CFA_register, 65, 0,
- elfcpp::DW_CFA_advance_loc + 2,
- elfcpp::DW_CFA_restore_extended, 65
- };
- // Describe __glink_PLTresolve use of LR, 32-bit version.
- static const unsigned char glink_eh_frame_fde_32[] =
- {
- 0, 0, 0, 0, // Replaced with offset to .glink.
- 0, 0, 0, 0, // Replaced with size of .glink.
- 0, // Augmentation size.
- elfcpp::DW_CFA_advance_loc + 2,
- elfcpp::DW_CFA_register, 65, 0,
- elfcpp::DW_CFA_advance_loc + 4,
- elfcpp::DW_CFA_restore_extended, 65
- };
- static const unsigned char default_fde[] =
- {
- 0, 0, 0, 0, // Replaced with offset to stubs.
- 0, 0, 0, 0, // Replaced with size of stubs.
- 0, // Augmentation size.
- elfcpp::DW_CFA_nop, // Pad.
- elfcpp::DW_CFA_nop,
- elfcpp::DW_CFA_nop
- };
- template<bool big_endian>
- static inline void
- write_insn(unsigned char* p, uint32_t v)
- {
- elfcpp::Swap<32, big_endian>::writeval(p, v);
- }
- template<int size>
- static inline unsigned int
- param_plt_align()
- {
- if (!parameters->options().user_set_plt_align())
- return size == 64 ? 32 : 8;
- return 1 << parameters->options().plt_align();
- }
- // Stub_table holds information about plt and long branch stubs.
- // Stubs are built in an area following some input section determined
- // by group_sections(). This input section is converted to a relaxed
- // input section allowing it to be resized to accommodate the stubs
- template<int size, bool big_endian>
- class Stub_table : public Output_relaxed_input_section
- {
- public:
- struct Plt_stub_ent
- {
- Plt_stub_ent(unsigned int off, unsigned int indx)
- : off_(off), indx_(indx), tocoff_(0), p9off_(0), tsize_ (0), iter_(0),
- toc_(0), notoc_(0), p9notoc_(0), r2save_(0), localentry0_(0)
- { }
- unsigned int off_;
- unsigned int indx_;
- // off_ points at p10 notoc stub, tocoff_ is offset from there to
- // toc stub, p9off_ is offset to p9notoc stub
- unsigned int tocoff_ : 8;
- unsigned int p9off_ : 8;
- // The size of the toc stub, used to locate blr on tls_get_addr stub.
- unsigned int tsize_ : 8;
- // Stub revision management
- unsigned int iter_ : 1;
- // The three types of stubs.
- unsigned int toc_ : 1;
- unsigned int notoc_ : 1;
- unsigned int p9notoc_ : 1;
- // Each with a possible variant saving r2 first
- unsigned int r2save_ : 1;
- // Handy cached info from symbol
- unsigned int localentry0_ : 1;
- };
- struct Branch_stub_ent
- {
- Branch_stub_ent(unsigned int off)
- : off_(off), tocoff_(0), p9off_(0), iter_(0), toc_(0), notoc_(0),
- p9notoc_(0), save_res_(0), other_(0)
- { }
- unsigned int off_;
- // off_ points at p10 notoc stub, tocoff_ is offset from there to
- // toc stub, p9off_ is offset to p9notoc stub
- unsigned int tocoff_ : 8;
- unsigned int p9off_ : 8;
- // Stub revision management
- unsigned int iter_ : 1;
- // Four types of stubs.
- unsigned int toc_ : 1;
- unsigned int notoc_ : 1;
- unsigned int p9notoc_ : 1;
- unsigned int save_res_ : 1;
- // Handy cached info from symbol
- unsigned int other_ : 3;
- };
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- static const Address invalid_address = static_cast<Address>(0) - 1;
- Stub_table(Target_powerpc<size, big_endian>* targ,
- Output_section* output_section,
- const Output_section::Input_section* owner,
- uint32_t id)
- : Output_relaxed_input_section(owner->relobj(), owner->shndx(),
- owner->relobj()
- ->section_addralign(owner->shndx())),
- targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
- orig_data_size_(owner->current_data_size()),
- plt_size_(0), last_plt_size_(0),
- branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
- need_save_res_(false), need_resize_(false), resizing_(false),
- uniq_(id)
- {
- this->set_output_section(output_section);
- std::vector<Output_relaxed_input_section*> new_relaxed;
- new_relaxed.push_back(this);
- output_section->convert_input_sections_to_relaxed_sections(new_relaxed);
- }
- // Add a plt call stub.
- bool
- add_plt_call_entry(Address,
- const Sized_relobj_file<size, big_endian>*,
- const Symbol*,
- unsigned int,
- Address,
- bool);
- bool
- add_plt_call_entry(Address,
- const Sized_relobj_file<size, big_endian>*,
- unsigned int,
- unsigned int,
- Address,
- bool);
- // Find a given plt call stub.
- const Plt_stub_ent*
- find_plt_call_entry(const Symbol*) const;
- const Plt_stub_ent*
- find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
- unsigned int) const;
- const Plt_stub_ent*
- find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
- const Symbol*,
- unsigned int,
- Address) const;
- const Plt_stub_ent*
- find_plt_call_entry(const Sized_relobj_file<size, big_endian>*,
- unsigned int,
- unsigned int,
- Address) const;
- // Add a long branch stub.
- bool
- add_long_branch_entry(unsigned int, Address, Address, unsigned int, bool);
- const Branch_stub_ent*
- find_long_branch_entry(Address) const;
- bool
- can_reach_stub(Address from, unsigned int off, unsigned int r_type)
- {
- Address max_branch_offset = max_branch_delta<size>(r_type);
- if (max_branch_offset == 0)
- return true;
- gold_assert(from != invalid_address);
- Address loc = off + this->stub_address();
- return loc - from + max_branch_offset < 2 * max_branch_offset;
- }
- void
- clear_stubs(bool all)
- {
- this->plt_call_stubs_.clear();
- this->plt_size_ = 0;
- this->long_branch_stubs_.clear();
- this->branch_size_ = 0;
- this->need_save_res_ = false;
- if (all)
- {
- this->last_plt_size_ = 0;
- this->last_branch_size_ = 0;
- }
- }
- bool
- need_resize() const
- { return need_resize_; }
- void
- set_resizing(bool val)
- {
- this->resizing_ = val;
- if (val)
- {
- this->need_resize_ = false;
- this->plt_size_ = 0;
- this->branch_size_ = 0;
- this->need_save_res_ = false;
- }
- }
- Address
- set_address_and_size(const Output_section* os, Address off)
- {
- Address start_off = off;
- off += this->orig_data_size_;
- Address my_size = this->plt_size_ + this->branch_size_;
- if (this->need_save_res_)
- my_size += this->targ_->savres_section()->data_size();
- if (my_size != 0)
- off = align_address(off, this->stub_align());
- // Include original section size and alignment padding in size
- my_size += off - start_off;
- // Ensure new size is always larger than min size
- // threshold. Alignment requirement is included in "my_size", so
- // increase "my_size" does not invalidate alignment.
- if (my_size < this->min_size_threshold_)
- my_size = this->min_size_threshold_;
- this->reset_address_and_file_offset();
- this->set_current_data_size(my_size);
- this->set_address_and_file_offset(os->address() + start_off,
- os->offset() + start_off);
- return my_size;
- }
- Address
- stub_address() const
- {
- return align_address(this->address() + this->orig_data_size_,
- this->stub_align());
- }
- Address
- stub_offset() const
- {
- return align_address(this->offset() + this->orig_data_size_,
- this->stub_align());
- }
- section_size_type
- plt_size() const
- { return this->plt_size_; }
- section_size_type
- branch_size() const
- { return this->branch_size_; }
- void
- set_min_size_threshold(Address min_size)
- { this->min_size_threshold_ = min_size; }
- void
- define_stub_syms(Symbol_table*);
- bool
- size_update()
- {
- Output_section* os = this->output_section();
- if (os->addralign() < this->stub_align())
- {
- os->set_addralign(this->stub_align());
- // FIXME: get rid of the insane checkpointing.
- // We can't increase alignment of the input section to which
- // stubs are attached; The input section may be .init which
- // is pasted together with other .init sections to form a
- // function. Aligning might insert zero padding resulting in
- // sigill. However we do need to increase alignment of the
- // output section so that the align_address() on offset in
- // set_address_and_size() adds the same padding as the
- // align_address() on address in stub_address().
- // What's more, we need this alignment for the layout done in
- // relaxation_loop_body() so that the output section starts at
- // a suitably aligned address.
- os->checkpoint_set_addralign(this->stub_align());
- }
- if (this->last_plt_size_ != this->plt_size_
- || this->last_branch_size_ != this->branch_size_)
- {
- this->last_plt_size_ = this->plt_size_;
- this->last_branch_size_ = this->branch_size_;
- return true;
- }
- return false;
- }
- // Add .eh_frame info for this stub section.
- void
- add_eh_frame(Layout* layout);
- // Remove .eh_frame info for this stub section.
- void
- remove_eh_frame(Layout* layout);
- Target_powerpc<size, big_endian>*
- targ() const
- { return targ_; }
- private:
- class Plt_stub_key;
- class Plt_stub_key_hash;
- typedef Unordered_map<Plt_stub_key, Plt_stub_ent,
- Plt_stub_key_hash> Plt_stub_entries;
- class Branch_stub_key;
- class Branch_stub_key_hash;
- typedef Unordered_map<Branch_stub_key, Branch_stub_ent,
- Branch_stub_key_hash> Branch_stub_entries;
- // Alignment of stub section.
- unsigned int
- stub_align() const
- {
- unsigned int min_align = size == 64 ? 32 : 16;
- unsigned int user_align = 1 << parameters->options().plt_align();
- return std::max(user_align, min_align);
- }
- // Return the plt offset for the given call stub.
- Address
- plt_off(typename Plt_stub_entries::const_iterator p,
- const Output_data_plt_powerpc<size, big_endian>** sec) const
- {
- const Symbol* gsym = p->first.sym_;
- if (gsym != NULL)
- return this->targ_->plt_off(gsym, sec);
- else
- {
- const Sized_relobj_file<size, big_endian>* relobj = p->first.object_;
- unsigned int local_sym_index = p->first.locsym_;
- return this->targ_->plt_off(relobj, local_sym_index, sec);
- }
- }
- // Size of a given plt call stub.
- unsigned int
- plt_call_size(typename Plt_stub_entries::iterator p) const;
- unsigned int
- plt_call_align(unsigned int bytes) const
- {
- unsigned int align = param_plt_align<size>();
- return (bytes + align - 1) & -align;
- }
- // Return long branch stub size.
- unsigned int
- branch_stub_size(typename Branch_stub_entries::iterator p,
- bool* need_lt);
- void
- build_tls_opt_head(unsigned char** pp, bool save_lr);
- void
- build_tls_opt_tail(unsigned char* p);
- void
- plt_error(const Plt_stub_key& p);
- // Write out stubs.
- void
- do_write(Output_file*);
- // Plt call stub keys.
- class Plt_stub_key
- {
- public:
- Plt_stub_key(const Symbol* sym)
- : sym_(sym), object_(0), addend_(0), locsym_(0)
- { }
- Plt_stub_key(const Sized_relobj_file<size, big_endian>* object,
- unsigned int locsym_index)
- : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
- { }
- Plt_stub_key(const Sized_relobj_file<size, big_endian>* object,
- const Symbol* sym,
- unsigned int r_type,
- Address addend)
- : sym_(sym), object_(0), addend_(0), locsym_(0)
- {
- if (size != 32)
- this->addend_ = addend;
- else if (parameters->options().output_is_position_independent()
- && (r_type == elfcpp::R_PPC_PLTREL24
- || r_type == elfcpp::R_POWERPC_PLTCALL))
- {
- this->addend_ = addend;
- if (this->addend_ >= 32768)
- this->object_ = object;
- }
- }
- Plt_stub_key(const Sized_relobj_file<size, big_endian>* object,
- unsigned int locsym_index,
- unsigned int r_type,
- Address addend)
- : sym_(NULL), object_(object), addend_(0), locsym_(locsym_index)
- {
- if (size != 32)
- this->addend_ = addend;
- else if (parameters->options().output_is_position_independent()
- && (r_type == elfcpp::R_PPC_PLTREL24
- || r_type == elfcpp::R_POWERPC_PLTCALL))
- this->addend_ = addend;
- }
- bool operator==(const Plt_stub_key& that) const
- {
- return (this->sym_ == that.sym_
- && this->object_ == that.object_
- && this->addend_ == that.addend_
- && this->locsym_ == that.locsym_);
- }
- const Symbol* sym_;
- const Sized_relobj_file<size, big_endian>* object_;
- typename elfcpp::Elf_types<size>::Elf_Addr addend_;
- unsigned int locsym_;
- };
- class Plt_stub_key_hash
- {
- public:
- size_t operator()(const Plt_stub_key& ent) const
- {
- return (reinterpret_cast<uintptr_t>(ent.sym_)
- ^ reinterpret_cast<uintptr_t>(ent.object_)
- ^ ent.addend_
- ^ ent.locsym_);
- }
- };
- // Long branch stub keys.
- class Branch_stub_key
- {
- public:
- Branch_stub_key(Address to)
- : dest_(to)
- { }
- bool operator==(const Branch_stub_key& that) const
- {
- return this->dest_ == that.dest_;
- }
- Address dest_;
- };
- class Branch_stub_key_hash
- {
- public:
- size_t operator()(const Branch_stub_key& key) const
- { return key.dest_; }
- };
- // In a sane world this would be a global.
- Target_powerpc<size, big_endian>* targ_;
- // Map sym/object/addend to stub offset.
- Plt_stub_entries plt_call_stubs_;
- // Map destination address to stub offset.
- Branch_stub_entries long_branch_stubs_;
- // size of input section
- section_size_type orig_data_size_;
- // size of stubs
- section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
- // Some rare cases cause (PR/20529) fluctuation in stub table
- // size, which leads to an endless relax loop. This is to be fixed
- // by, after the first few iterations, allowing only increase of
- // stub table size. This variable sets the minimal possible size of
- // a stub table, it is zero for the first few iterations, then
- // increases monotonically.
- Address min_size_threshold_;
- // Set if this stub group needs a copy of out-of-line register
- // save/restore functions.
- bool need_save_res_;
- // Set when notoc_/r2save_ changes after sizing a stub
- bool need_resize_;
- // Set when resizing stubs
- bool resizing_;
- // Per stub table unique identifier.
- uint32_t uniq_;
- };
- // Add a plt call stub, if we do not already have one for this
- // sym/object/addend combo.
- template<int size, bool big_endian>
- bool
- Stub_table<size, big_endian>::add_plt_call_entry(
- Address from,
- const Sized_relobj_file<size, big_endian>* object,
- const Symbol* gsym,
- unsigned int r_type,
- Address addend,
- bool tocsave)
- {
- Plt_stub_key key(object, gsym, r_type, addend);
- Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size());
- std::pair<typename Plt_stub_entries::iterator, bool> p
- = this->plt_call_stubs_.insert(std::make_pair(key, ent));
- if (size == 64)
- {
- if (p.second
- && this->targ_->is_elfv2_localentry0(gsym))
- {
- p.first->second.localentry0_ = 1;
- this->targ_->set_has_localentry0();
- }
- if (r_type == elfcpp::R_PPC64_REL24_NOTOC
- || r_type == elfcpp::R_PPC64_REL24_P9NOTOC)
- {
- if (this->targ_->power10_stubs()
- && (!this->targ_->power10_stubs_auto()
- || r_type == elfcpp::R_PPC64_REL24_NOTOC))
- {
- if (!p.second && !p.first->second.notoc_)
- this->need_resize_ = true;
- p.first->second.notoc_ = 1;
- }
- else
- {
- if (!p.second && !p.first->second.p9notoc_)
- this->need_resize_ = true;
- p.first->second.p9notoc_ = 1;
- }
- }
- else
- {
- if (!p.second && !p.first->second.toc_)
- this->need_resize_ = true;
- p.first->second.toc_ = 1;
- if (!tocsave && !p.first->second.localentry0_)
- {
- if (!p.second && !p.first->second.r2save_)
- this->need_resize_ = true;
- p.first->second.r2save_ = 1;
- }
- }
- }
- if (p.second || (this->resizing_ && !p.first->second.iter_))
- {
- if (this->resizing_)
- {
- p.first->second.iter_ = 1;
- p.first->second.off_ = this->plt_size_;
- }
- this->plt_size_ += this->plt_call_size(p.first);
- if (this->targ_->is_tls_get_addr_opt(gsym))
- this->targ_->set_has_tls_get_addr_opt();
- }
- return this->can_reach_stub(from, p.first->second.off_, r_type);
- }
- template<int size, bool big_endian>
- bool
- Stub_table<size, big_endian>::add_plt_call_entry(
- Address from,
- const Sized_relobj_file<size, big_endian>* object,
- unsigned int locsym_index,
- unsigned int r_type,
- Address addend,
- bool tocsave)
- {
- Plt_stub_key key(object, locsym_index, r_type, addend);
- Plt_stub_ent ent(this->plt_size_, this->plt_call_stubs_.size());
- std::pair<typename Plt_stub_entries::iterator, bool> p
- = this->plt_call_stubs_.insert(std::make_pair(key, ent));
- if (size == 64)
- {
- if (p.second
- && this->targ_->is_elfv2_localentry0(object, locsym_index))
- {
- p.first->second.localentry0_ = 1;
- this->targ_->set_has_localentry0();
- }
- if (r_type == elfcpp::R_PPC64_REL24_NOTOC
- || r_type == elfcpp::R_PPC64_REL24_P9NOTOC)
- {
- if (this->targ_->power10_stubs()
- && (!this->targ_->power10_stubs_auto()
- || r_type == elfcpp::R_PPC64_REL24_NOTOC))
- {
- if (!p.second && !p.first->second.notoc_)
- this->need_resize_ = true;
- p.first->second.notoc_ = 1;
- }
- else
- {
- if (!p.second && !p.first->second.p9notoc_)
- this->need_resize_ = true;
- p.first->second.p9notoc_ = 1;
- }
- }
- else
- {
- if (!p.second && !p.first->second.toc_)
- this->need_resize_ = true;
- p.first->second.toc_ = 1;
- if (!tocsave && !p.first->second.localentry0_)
- {
- if (!p.second && !p.first->second.r2save_)
- this->need_resize_ = true;
- p.first->second.r2save_ = 1;
- }
- }
- }
- if (p.second || (this->resizing_ && !p.first->second.iter_))
- {
- if (this->resizing_)
- {
- p.first->second.iter_ = 1;
- p.first->second.off_ = this->plt_size_;
- }
- this->plt_size_ += this->plt_call_size(p.first);
- }
- return this->can_reach_stub(from, p.first->second.off_, r_type);
- }
- // Find a plt call stub.
- template<int size, bool big_endian>
- const typename Stub_table<size, big_endian>::Plt_stub_ent*
- Stub_table<size, big_endian>::find_plt_call_entry(
- const Sized_relobj_file<size, big_endian>* object,
- const Symbol* gsym,
- unsigned int r_type,
- Address addend) const
- {
- Plt_stub_key key(object, gsym, r_type, addend);
- typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key);
- if (p == this->plt_call_stubs_.end())
- return NULL;
- return &p->second;
- }
- template<int size, bool big_endian>
- const typename Stub_table<size, big_endian>::Plt_stub_ent*
- Stub_table<size, big_endian>::find_plt_call_entry(const Symbol* gsym) const
- {
- Plt_stub_key key(gsym);
- typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key);
- if (p == this->plt_call_stubs_.end())
- return NULL;
- return &p->second;
- }
- template<int size, bool big_endian>
- const typename Stub_table<size, big_endian>::Plt_stub_ent*
- Stub_table<size, big_endian>::find_plt_call_entry(
- const Sized_relobj_file<size, big_endian>* object,
- unsigned int locsym_index,
- unsigned int r_type,
- Address addend) const
- {
- Plt_stub_key key(object, locsym_index, r_type, addend);
- typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key);
- if (p == this->plt_call_stubs_.end())
- return NULL;
- return &p->second;
- }
- template<int size, bool big_endian>
- const typename Stub_table<size, big_endian>::Plt_stub_ent*
- Stub_table<size, big_endian>::find_plt_call_entry(
- const Sized_relobj_file<size, big_endian>* object,
- unsigned int locsym_index) const
- {
- Plt_stub_key key(object, locsym_index);
- typename Plt_stub_entries::const_iterator p = this->plt_call_stubs_.find(key);
- if (p == this->plt_call_stubs_.end())
- return NULL;
- return &p->second;
- }
- // Add a long branch stub if we don't already have one to given
- // destination.
- template<int size, bool big_endian>
- bool
- Stub_table<size, big_endian>::add_long_branch_entry(
- unsigned int r_type,
- Address from,
- Address to,
- unsigned int other,
- bool save_res)
- {
- Branch_stub_key key(to);
- Branch_stub_ent ent(this->branch_size_);
- std::pair<typename Branch_stub_entries::iterator, bool> p
- = this->long_branch_stubs_.insert(std::make_pair(key, ent));
- if (save_res)
- {
- if (!p.second && !p.first->second.save_res_)
- this->need_resize_ = true;
- p.first->second.save_res_ = true;
- }
- else if (size == 64
- && (r_type == elfcpp::R_PPC64_REL24_NOTOC
- || r_type == elfcpp::R_PPC64_REL24_P9NOTOC))
- {
- if (this->targ_->power10_stubs()
- && (!this->targ_->power10_stubs_auto()
- || r_type == elfcpp::R_PPC64_REL24_NOTOC))
- {
- if (!p.second && !p.first->second.notoc_)
- this->need_resize_ = true;
- p.first->second.notoc_ = true;
- }
- else
- {
- if (!p.second && !p.first->second.p9notoc_)
- this->need_resize_ = true;
- p.first->second.p9notoc_ = true;
- }
- }
- else
- {
- if (!p.second && !p.first->second.toc_)
- this->need_resize_ = true;
- p.first->second.toc_ = true;
- }
- if (size == 64 && p.first->second.other_ == 0)
- p.first->second.other_ = other;
- if (p.second || (this->resizing_ && !p.first->second.iter_))
- {
- if (this->resizing_)
- {
- p.first->second.iter_ = 1;
- p.first->second.off_ = this->branch_size_;
- }
- if (save_res)
- this->need_save_res_ = true;
- else
- {
- bool need_lt = false;
- unsigned int stub_size = this->branch_stub_size(p.first, &need_lt);
- this->branch_size_ += stub_size;
- if (size == 64 && need_lt)
- this->targ_->add_branch_lookup_table(to);
- }
- }
- return this->can_reach_stub(from, p.first->second.off_, r_type);
- }
- // Find long branch stub offset.
- template<int size, bool big_endian>
- const typename Stub_table<size, big_endian>::Branch_stub_ent*
- Stub_table<size, big_endian>::find_long_branch_entry(Address to) const
- {
- Branch_stub_key key(to);
- typename Branch_stub_entries::const_iterator p
- = this->long_branch_stubs_.find(key);
- if (p == this->long_branch_stubs_.end())
- return NULL;
- return &p->second;
- }
- template<bool big_endian>
- static void
- eh_advance (std::vector<unsigned char>& fde, unsigned int delta)
- {
- delta /= 4;
- if (delta < 64)
- fde.push_back(elfcpp::DW_CFA_advance_loc + delta);
- else if (delta < 256)
- {
- fde.push_back(elfcpp::DW_CFA_advance_loc1);
- fde.push_back(delta);
- }
- else if (delta < 65536)
- {
- fde.resize(fde.size() + 3);
- unsigned char *p = &*fde.end() - 3;
- *p++ = elfcpp::DW_CFA_advance_loc2;
- elfcpp::Swap<16, big_endian>::writeval(p, delta);
- }
- else
- {
- fde.resize(fde.size() + 5);
- unsigned char *p = &*fde.end() - 5;
- *p++ = elfcpp::DW_CFA_advance_loc4;
- elfcpp::Swap<32, big_endian>::writeval(p, delta);
- }
- }
- template<typename T>
- static bool
- stub_sort(T s1, T s2)
- {
- return s1->second.off_ < s2->second.off_;
- }
- // Add .eh_frame info for this stub section. Unlike other linker
- // generated .eh_frame this is added late in the link, because we
- // only want the .eh_frame info if this particular stub section is
- // non-empty.
- template<int size, bool big_endian>
- void
- Stub_table<size, big_endian>::add_eh_frame(Layout* layout)
- {
- if (size != 64
- || !parameters->options().ld_generated_unwind_info())
- return;
- // Since we add stub .eh_frame info late, it must be placed
- // after all other linker generated .eh_frame info so that
- // merge mapping need not be updated for input sections.
- // There is no provision to use a different CIE to that used
- // by .glink.
- if (!this->targ_->has_glink())
- return;
- typedef typename Plt_stub_entries::iterator plt_iter;
- std::vector<plt_iter> calls;
- if (!this->plt_call_stubs_.empty())
- for (plt_iter cs = this->plt_call_stubs_.begin();
- cs != this->plt_call_stubs_.end();
- ++cs)
- if (cs->second.p9notoc_
- || (cs->second.toc_
- && cs->second.r2save_
- && !cs->second.localentry0_
- && this->targ_->is_tls_get_addr_opt(cs->first.sym_)))
- calls.push_back(cs);
- if (calls.size() > 1)
- std::stable_sort(calls.begin(), calls.end(),
- stub_sort<plt_iter>);
- typedef typename Branch_stub_entries::const_iterator branch_iter;
- std::vector<branch_iter> branches;
- if (!this->long_branch_stubs_.empty()
- && !this->targ_->power10_stubs())
- for (branch_iter bs = this->long_branch_stubs_.begin();
- bs != this->long_branch_stubs_.end();
- ++bs)
- if (bs->second.notoc_)
- branches.push_back(bs);
- if (branches.size() > 1)
- std::stable_sort(branches.begin(), branches.end(),
- stub_sort<branch_iter>);
- if (calls.empty() && branches.empty())
- return;
- unsigned int last_eh_loc = 0;
- // offset pcrel sdata4, size udata4, and augmentation size byte.
- std::vector<unsigned char> fde(9, 0);
- for (unsigned int i = 0; i < calls.size(); i++)
- {
- plt_iter cs = calls[i];
- unsigned int off = cs->second.off_;
- // The __tls_get_addr_opt call stub needs to describe where
- // it saves LR, to support exceptions that might be thrown
- // from __tls_get_addr, and to support asynchronous exceptions.
- if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- {
- off += 7 * 4;
- if (cs->second.toc_
- && cs->second.r2save_
- && !cs->second.localentry0_)
- {
- off += cs->second.tocoff_ + 2 * 4;
- eh_advance<big_endian>(fde, off - last_eh_loc);
- fde.resize(fde.size() + 6);
- unsigned char* p = &*fde.end() - 6;
- *p++ = elfcpp::DW_CFA_offset_extended_sf;
- *p++ = 65;
- *p++ = -(this->targ_->stk_linker() / 8) & 0x7f;
- unsigned int delta = cs->second.tsize_ - 9 * 4 - 4;
- *p++ = elfcpp::DW_CFA_advance_loc + delta / 4;
- *p++ = elfcpp::DW_CFA_restore_extended;
- *p++ = 65;
- last_eh_loc = off + delta;
- off = cs->second.off_ + 7 * 4;
- }
- }
- // notoc stubs also should describe LR changes, to support
- // asynchronous exceptions.
- if (cs->second.p9notoc_)
- {
- off += cs->second.p9off_;
- off += (cs->second.r2save_ ? 4 : 0) + 8;
- eh_advance<big_endian>(fde, off - last_eh_loc);
- fde.resize(fde.size() + 6);
- unsigned char* p = &*fde.end() - 6;
- *p++ = elfcpp::DW_CFA_register;
- *p++ = 65;
- *p++ = 12;
- *p++ = elfcpp::DW_CFA_advance_loc + 8 / 4;
- *p++ = elfcpp::DW_CFA_restore_extended;
- *p++ = 65;
- last_eh_loc = off + 8;
- }
- }
- for (unsigned int i = 0; i < branches.size(); i++)
- {
- branch_iter bs = branches[i];
- unsigned int off = bs->second.off_ + 8;
- eh_advance<big_endian>(fde, off - last_eh_loc);
- fde.resize(fde.size() + 6);
- unsigned char* p = &*fde.end() - 6;
- *p++ = elfcpp::DW_CFA_register;
- *p++ = 65;
- *p++ = 12;
- *p++ = elfcpp::DW_CFA_advance_loc + 8 / 4;
- *p++ = elfcpp::DW_CFA_restore_extended;
- *p++ = 65;
- last_eh_loc = off + 8;
- }
- layout->add_eh_frame_for_plt(this,
- Eh_cie<size>::eh_frame_cie,
- sizeof (Eh_cie<size>::eh_frame_cie),
- &*fde.begin(), fde.size());
- }
- template<int size, bool big_endian>
- void
- Stub_table<size, big_endian>::remove_eh_frame(Layout* layout)
- {
- if (size == 64
- && parameters->options().ld_generated_unwind_info()
- && this->targ_->has_glink())
- layout->remove_eh_frame_for_plt(this,
- Eh_cie<size>::eh_frame_cie,
- sizeof (Eh_cie<size>::eh_frame_cie));
- }
- // A class to handle .glink.
- template<int size, bool big_endian>
- class Output_data_glink : public Output_section_data
- {
- public:
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- static const Address invalid_address = static_cast<Address>(0) - 1;
- Output_data_glink(Target_powerpc<size, big_endian>* targ)
- : Output_section_data(16), targ_(targ), global_entry_stubs_(),
- end_branch_table_(), ge_size_(0)
- { }
- void
- add_eh_frame(Layout* layout);
- void
- add_global_entry(const Symbol*);
- Address
- find_global_entry(const Symbol*) const;
- unsigned int
- global_entry_align(unsigned int off) const
- {
- unsigned int align = param_plt_align<size>();
- return (off + align - 1) & -align;
- }
- unsigned int
- global_entry_off() const
- {
- return this->global_entry_align(this->end_branch_table_);
- }
- Address
- global_entry_address() const
- {
- gold_assert(this->is_data_size_valid());
- return this->address() + this->global_entry_off();
- }
- int
- pltresolve_size() const
- {
- if (size == 64)
- return (8
- + (this->targ_->abiversion() < 2 ? 11 * 4
- : this->targ_->has_localentry0() ? 14 * 4 : 13 * 4));
- return 16 * 4;
- }
- protected:
- // Write to a map file.
- void
- do_print_to_mapfile(Mapfile* mapfile) const
- { mapfile->print_output_data(this, _("** glink")); }
- private:
- void
- set_final_data_size();
- // Write out .glink
- void
- do_write(Output_file*);
- // Allows access to .got and .plt for do_write.
- Target_powerpc<size, big_endian>* targ_;
- // Map sym to stub offset.
- typedef Unordered_map<const Symbol*, unsigned int> Global_entry_stub_entries;
- Global_entry_stub_entries global_entry_stubs_;
- unsigned int end_branch_table_, ge_size_;
- };
- template<int size, bool big_endian>
- void
- Output_data_glink<size, big_endian>::add_eh_frame(Layout* layout)
- {
- if (!parameters->options().ld_generated_unwind_info())
- return;
- if (size == 64)
- {
- if (this->targ_->abiversion() < 2)
- layout->add_eh_frame_for_plt(this,
- Eh_cie<64>::eh_frame_cie,
- sizeof (Eh_cie<64>::eh_frame_cie),
- glink_eh_frame_fde_64v1,
- sizeof (glink_eh_frame_fde_64v1));
- else if (this->targ_->has_localentry0())
- layout->add_eh_frame_for_plt(this,
- Eh_cie<64>::eh_frame_cie,
- sizeof (Eh_cie<64>::eh_frame_cie),
- glink_eh_frame_fde_64v2_localentry0,
- sizeof (glink_eh_frame_fde_64v2));
- else
- layout->add_eh_frame_for_plt(this,
- Eh_cie<64>::eh_frame_cie,
- sizeof (Eh_cie<64>::eh_frame_cie),
- glink_eh_frame_fde_64v2,
- sizeof (glink_eh_frame_fde_64v2));
- }
- else
- {
- // 32-bit .glink can use the default since the CIE return
- // address reg, LR, is valid.
- layout->add_eh_frame_for_plt(this,
- Eh_cie<32>::eh_frame_cie,
- sizeof (Eh_cie<32>::eh_frame_cie),
- default_fde,
- sizeof (default_fde));
- // Except where LR is used in a PIC __glink_PLTresolve.
- if (parameters->options().output_is_position_independent())
- layout->add_eh_frame_for_plt(this,
- Eh_cie<32>::eh_frame_cie,
- sizeof (Eh_cie<32>::eh_frame_cie),
- glink_eh_frame_fde_32,
- sizeof (glink_eh_frame_fde_32));
- }
- }
- template<int size, bool big_endian>
- void
- Output_data_glink<size, big_endian>::add_global_entry(const Symbol* gsym)
- {
- unsigned int off = this->global_entry_align(this->ge_size_);
- std::pair<typename Global_entry_stub_entries::iterator, bool> p
- = this->global_entry_stubs_.insert(std::make_pair(gsym, off));
- if (p.second)
- this->ge_size_ = off + 16;
- }
- template<int size, bool big_endian>
- typename Output_data_glink<size, big_endian>::Address
- Output_data_glink<size, big_endian>::find_global_entry(const Symbol* gsym) const
- {
- typename Global_entry_stub_entries::const_iterator p
- = this->global_entry_stubs_.find(gsym);
- return p == this->global_entry_stubs_.end() ? invalid_address : p->second;
- }
- template<int size, bool big_endian>
- void
- Output_data_glink<size, big_endian>::set_final_data_size()
- {
- unsigned int count = this->targ_->plt_entry_count();
- section_size_type total = 0;
- if (count != 0)
- {
- if (size == 32)
- {
- // space for branch table
- total += 4 * (count - 1);
- total += -total & 15;
- total += this->pltresolve_size();
- }
- else
- {
- total += this->pltresolve_size();
- // space for branch table
- total += 4 * count;
- if (this->targ_->abiversion() < 2)
- {
- total += 4 * count;
- if (count > 0x8000)
- total += 4 * (count - 0x8000);
- }
- }
- }
- this->end_branch_table_ = total;
- total = this->global_entry_align(total);
- total += this->ge_size_;
- this->set_data_size(total);
- }
- // Define symbols on stubs, identifying the stub.
- template<int size, bool big_endian>
- void
- Stub_table<size, big_endian>::define_stub_syms(Symbol_table* symtab)
- {
- if (!this->plt_call_stubs_.empty())
- {
- // The key for the plt call stub hash table includes addresses,
- // therefore traversal order depends on those addresses, which
- // can change between runs if gold is a PIE. Unfortunately the
- // output .symtab ordering depends on the order in which symbols
- // are added to the linker symtab. We want reproducible output
- // so must sort the call stub symbols.
- typedef typename Plt_stub_entries::iterator plt_iter;
- std::vector<plt_iter> sorted;
- sorted.resize(this->plt_call_stubs_.size());
- for (plt_iter cs = this->plt_call_stubs_.begin();
- cs != this->plt_call_stubs_.end();
- ++cs)
- sorted[cs->second.indx_] = cs;
- for (unsigned int i = 0; i < this->plt_call_stubs_.size(); ++i)
- {
- plt_iter cs = sorted[i];
- char add[10];
- add[0] = 0;
- if (cs->first.addend_ != 0)
- sprintf(add, "+%x", static_cast<uint32_t>(cs->first.addend_));
- char obj[10];
- obj[0] = 0;
- if (cs->first.object_)
- {
- const Powerpc_relobj<size, big_endian>* ppcobj = static_cast
- <const Powerpc_relobj<size, big_endian>*>(cs->first.object_);
- sprintf(obj, "%x:", ppcobj->uniq());
- }
- char localname[9];
- const char *symname;
- if (cs->first.sym_ == NULL)
- {
- sprintf(localname, "%x", cs->first.locsym_);
- symname = localname;
- }
- else if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- symname = this->targ_->tls_get_addr_opt()->name();
- else
- symname = cs->first.sym_->name();
- char* name = new char[8 + 10 + strlen(obj) + strlen(symname) + strlen(add) + 1];
- sprintf(name, "%08x.plt_call.%s%s%s", this->uniq_, obj, symname, add);
- Address value
- = this->stub_address() - this->address() + cs->second.off_;
- unsigned int stub_size = this->plt_call_size(cs);
- this->targ_->define_local(symtab, name, this, value, stub_size);
- }
- }
- typedef typename Branch_stub_entries::iterator branch_iter;
- for (branch_iter bs = this->long_branch_stubs_.begin();
- bs != this->long_branch_stubs_.end();
- ++bs)
- {
- if (bs->second.save_res_)
- continue;
- char* name = new char[8 + 13 + 16 + 1];
- sprintf(name, "%08x.long_branch.%llx", this->uniq_,
- static_cast<unsigned long long>(bs->first.dest_));
- Address value = (this->stub_address() - this->address()
- + this->plt_size_ + bs->second.off_);
- bool need_lt = false;
- unsigned int stub_size = this->branch_stub_size(bs, &need_lt);
- this->targ_->define_local(symtab, name, this, value, stub_size);
- }
- }
- // Emit the start of a __tls_get_addr_opt plt call stub.
- template<int size, bool big_endian>
- void
- Stub_table<size, big_endian>::build_tls_opt_head(unsigned char** pp,
- bool save_lr)
- {
- unsigned char* p = *pp;
- if (size == 64)
- {
- write_insn<big_endian>(p, ld_11_3 + 0);
- p += 4;
- write_insn<big_endian>(p, ld_12_3 + 8);
- p += 4;
- write_insn<big_endian>(p, mr_0_3);
- p += 4;
- write_insn<big_endian>(p, cmpdi_11_0);
- p += 4;
- write_insn<big_endian>(p, add_3_12_13);
- p += 4;
- write_insn<big_endian>(p, beqlr);
- p += 4;
- write_insn<big_endian>(p, mr_3_0);
- p += 4;
- if (save_lr)
- {
- write_insn<big_endian>(p, mflr_11);
- p += 4;
- write_insn<big_endian>(p, (std_11_1 + this->targ_->stk_linker()));
- p += 4;
- }
- }
- else
- {
- write_insn<big_endian>(p, lwz_11_3 + 0);
- p += 4;
- write_insn<big_endian>(p, lwz_12_3 + 4);
- p += 4;
- write_insn<big_endian>(p, mr_0_3);
- p += 4;
- write_insn<big_endian>(p, cmpwi_11_0);
- p += 4;
- write_insn<big_endian>(p, add_3_12_2);
- p += 4;
- write_insn<big_endian>(p, beqlr);
- p += 4;
- write_insn<big_endian>(p, mr_3_0);
- p += 4;
- write_insn<big_endian>(p, nop);
- p += 4;
- }
- *pp = p;
- }
- // Emit the tail of a __tls_get_addr_opt plt call stub.
- template<int size, bool big_endian>
- void
- Stub_table<size, big_endian>::build_tls_opt_tail(unsigned char* p)
- {
- write_insn<big_endian>(p, bctrl);
- p += 4;
- write_insn<big_endian>(p, ld_2_1 + this->targ_->stk_toc());
- p += 4;
- write_insn<big_endian>(p, ld_11_1 + this->targ_->stk_linker());
- p += 4;
- write_insn<big_endian>(p, mtlr_11);
- p += 4;
- write_insn<big_endian>(p, blr);
- }
- // Emit pc-relative plt call stub code.
- template<bool big_endian>
- static unsigned char*
- build_power10_offset(unsigned char* p, uint64_t off, uint64_t odd, bool load)
- {
- uint64_t insn;
- if (off - odd + (1ULL << 33) < 1ULL << 34)
- {
- off -= odd;
- if (odd)
- {
- write_insn<big_endian>(p, nop);
- p += 4;
- }
- if (load)
- insn = pld_12_pc;
- else
- insn = paddi_12_pc;
- insn |= d34(off);
- write_insn<big_endian>(p, insn >> 32);
- p += 4;
- write_insn<big_endian>(p, insn & 0xffffffff);
- }
- else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32)
- {
- off -= 8 - odd;
- write_insn<big_endian>(p, li_11_0 | (ha34(off) & 0xffff));
- p += 4;
- if (!odd)
- {
- write_insn<big_endian>(p, sldi_11_11_34);
- p += 4;
- }
- insn = paddi_12_pc | d34(off);
- write_insn<big_endian>(p, insn >> 32);
- p += 4;
- write_insn<big_endian>(p, insn & 0xffffffff);
- p += 4;
- if (odd)
- {
- write_insn<big_endian>(p, sldi_11_11_34);
- p += 4;
- }
- if (load)
- write_insn<big_endian>(p, ldx_12_11_12);
- else
- write_insn<big_endian>(p, add_12_11_12);
- }
- else
- {
- off -= odd + 8;
- write_insn<big_endian>(p, lis_11 | ((ha34(off) >> 16) & 0x3fff));
- p += 4;
- write_insn<big_endian>(p, ori_11_11_0 | (ha34(off) & 0xffff));
- p += 4;
- if (odd)
- {
- write_insn<big_endian>(p, sldi_11_11_34);
- p += 4;
- }
- insn = paddi_12_pc | d34(off);
- write_insn<big_endian>(p, insn >> 32);
- p += 4;
- write_insn<big_endian>(p, insn & 0xffffffff);
- p += 4;
- if (!odd)
- {
- write_insn<big_endian>(p, sldi_11_11_34);
- p += 4;
- }
- if (load)
- write_insn<big_endian>(p, ldx_12_11_12);
- else
- write_insn<big_endian>(p, add_12_11_12);
- }
- p += 4;
- return p;
- }
- // Gets the address of a label (1:) in r11 and builds an offset in r12,
- // then adds it to r11 (LOAD false) or loads r12 from r11+r12 (LOAD true).
- // mflr %r12
- // bcl 20,31,1f
- // 1: mflr %r11
- // mtlr %r12
- // lis %r12,xxx-1b@highest
- // ori %r12,%r12,xxx-1b@higher
- // sldi %r12,%r12,32
- // oris %r12,%r12,xxx-1b@high
- // ori %r12,%r12,xxx-1b@l
- // add/ldx %r12,%r11,%r12
- template<bool big_endian>
- static unsigned char*
- build_notoc_offset(unsigned char* p, uint64_t off, bool load)
- {
- write_insn<big_endian>(p, mflr_12);
- p += 4;
- write_insn<big_endian>(p, bcl_20_31);
- p += 4;
- write_insn<big_endian>(p, mflr_11);
- p += 4;
- write_insn<big_endian>(p, mtlr_12);
- p += 4;
- if (off + 0x8000 < 0x10000)
- {
- if (load)
- write_insn<big_endian>(p, ld_12_11 + l(off));
- else
- write_insn<big_endian>(p, addi_12_11 + l(off));
- }
- else if (off + 0x80008000ULL < 0x100000000ULL)
- {
- write_insn<big_endian>(p, addis_12_11 + ha(off));
- p += 4;
- if (load)
- write_insn<big_endian>(p, ld_12_12 + l(off));
- else
- write_insn<big_endian>(p, addi_12_12 + l(off));
- }
- else
- {
- if (off + 0x800000000000ULL < 0x1000000000000ULL)
- {
- write_insn<big_endian>(p, li_12_0 + ((off >> 32) & 0xffff));
- p += 4;
- }
- else
- {
- write_insn<big_endian>(p, lis_12 + ((off >> 48) & 0xffff));
- p += 4;
- if (((off >> 32) & 0xffff) != 0)
- {
- write_insn<big_endian>(p, ori_12_12_0 + ((off >> 32) & 0xffff));
- p += 4;
- }
- }
- if (((off >> 32) & 0xffffffffULL) != 0)
- {
- write_insn<big_endian>(p, sldi_12_12_32);
- p += 4;
- }
- if (hi(off) != 0)
- {
- write_insn<big_endian>(p, oris_12_12_0 + hi(off));
- p += 4;
- }
- if (l(off) != 0)
- {
- write_insn<big_endian>(p, ori_12_12_0 + l(off));
- p += 4;
- }
- if (load)
- write_insn<big_endian>(p, ldx_12_11_12);
- else
- write_insn<big_endian>(p, add_12_11_12);
- }
- p += 4;
- return p;
- }
- // Size of a given plt call stub.
- template<int size, bool big_endian>
- unsigned int
- Stub_table<size, big_endian>::plt_call_size(
- typename Plt_stub_entries::iterator p) const
- {
- if (size == 32)
- {
- unsigned int bytes = 4 * 4;
- if (this->targ_->is_tls_get_addr_opt(p->first.sym_))
- bytes = 12 * 4;
- return this->plt_call_align(bytes);
- }
- const Output_data_plt_powerpc<size, big_endian>* plt;
- uint64_t plt_addr = this->plt_off(p, &plt);
- plt_addr += plt->address();
- if (this->targ_->power10_stubs()
- && this->targ_->power10_stubs_auto())
- {
- unsigned int bytes = 0;
- if (p->second.notoc_)
- {
- if (this->targ_->is_tls_get_addr_opt(p->first.sym_))
- bytes = 7 * 4;
- uint64_t from = this->stub_address() + p->second.off_ + bytes;
- uint64_t odd = from & 4;
- uint64_t off = plt_addr - from;
- if (off - odd + (1ULL << 33) < 1ULL << 34)
- bytes += odd + 4 * 4;
- else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32)
- bytes += 7 * 4;
- else
- bytes += 8 * 4;
- bytes = this->plt_call_align(bytes);
- }
- if (p->second.toc_)
- {
- p->second.tocoff_ = bytes;
- if (this->targ_->is_tls_get_addr_opt(p->first.sym_))
- {
- bytes += 7 * 4;
- if (p->second.r2save_ && !p->second.localentry0_)
- bytes += 2 * 4 + 4 * 4;
- }
- if (p->second.r2save_)
- bytes += 4;
- uint64_t got_addr = this->targ_->toc_pointer();
- uint64_t off = plt_addr - got_addr;
- bytes += 3 * 4 + 4 * (ha(off) != 0);
- p->second.tsize_ = bytes - p->second.tocoff_;
- bytes = this->plt_call_align(bytes);
- }
- if (p->second.p9notoc_)
- {
- p->second.p9off_ = bytes;
- if (this->targ_->is_tls_get_addr_opt(p->first.sym_))
- bytes += 7 * 4;
- uint64_t from = this->stub_address() + p->second.off_ + bytes + 2 * 4;
- uint64_t off = plt_addr - from;
- if (off + 0x8000 < 0x10000)
- bytes += 7 * 4;
- else if (off + 0x80008000ULL < 0x100000000ULL)
- bytes += 8 * 4;
- else
- {
- bytes += 8 * 4;
- if (off + 0x800000000000ULL >= 0x1000000000000ULL
- && ((off >> 32) & 0xffff) != 0)
- bytes += 4;
- if (((off >> 32) & 0xffffffffULL) != 0)
- bytes += 4;
- if (hi(off) != 0)
- bytes += 4;
- if (l(off) != 0)
- bytes += 4;
- }
- bytes = this->plt_call_align(bytes);
- }
- return bytes;
- }
- else
- {
- unsigned int bytes = 0;
- unsigned int tail = 0;
- if (this->targ_->is_tls_get_addr_opt(p->first.sym_))
- {
- bytes = 7 * 4;
- if (p->second.r2save_ && !p->second.localentry0_)
- {
- bytes = 9 * 4;
- tail = 4 * 4;
- }
- }
- if (p->second.r2save_)
- bytes += 4;
- if (this->targ_->power10_stubs())
- {
- uint64_t from = this->stub_address() + p->second.off_ + bytes;
- uint64_t odd = from & 4;
- uint64_t off = plt_addr - from;
- if (off - odd + (1ULL << 33) < 1ULL << 34)
- bytes += odd + 4 * 4;
- else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32)
- bytes += 7 * 4;
- else
- bytes += 8 * 4;
- return this->plt_call_align(bytes + tail);
- }
- if (p->second.p9notoc_)
- {
- uint64_t from = this->stub_address() + p->second.off_ + bytes + 2 * 4;
- uint64_t off = plt_addr - from;
- if (off + 0x8000 < 0x10000)
- bytes += 7 * 4;
- else if (off + 0x80008000ULL < 0x100000000ULL)
- bytes += 8 * 4;
- else
- {
- bytes += 8 * 4;
- if (off + 0x800000000000ULL >= 0x1000000000000ULL
- && ((off >> 32) & 0xffff) != 0)
- bytes += 4;
- if (((off >> 32) & 0xffffffffULL) != 0)
- bytes += 4;
- if (hi(off) != 0)
- bytes += 4;
- if (l(off) != 0)
- bytes += 4;
- }
- return this->plt_call_align(bytes + tail);
- }
- uint64_t got_addr = this->targ_->toc_pointer();
- uint64_t off = plt_addr - got_addr;
- bytes += 3 * 4 + 4 * (ha(off) != 0);
- if (this->targ_->abiversion() < 2)
- {
- bool static_chain = parameters->options().plt_static_chain();
- bool thread_safe = this->targ_->plt_thread_safe();
- bytes += (4
- + 4 * static_chain
- + 8 * thread_safe
- + 4 * (ha(off + 8 + 8 * static_chain) != ha(off)));
- }
- return this->plt_call_align(bytes + tail);
- }
- }
- // Return long branch stub size.
- template<int size, bool big_endian>
- unsigned int
- Stub_table<size, big_endian>::branch_stub_size(
- typename Branch_stub_entries::iterator p,
- bool* need_lt)
- {
- Address loc = this->stub_address() + this->last_plt_size_ + p->second.off_;
- if (size == 32)
- {
- if (p->first.dest_ - loc + (1 << 25) < 2 << 25)
- return 4;
- if (parameters->options().output_is_position_independent())
- return 32;
- return 16;
- }
- uint64_t off = p->first.dest_ - loc;
- unsigned int bytes = 0;
- if (p->second.notoc_)
- {
- if (this->targ_->power10_stubs())
- {
- Address odd = loc & 4;
- if (off + (1 << 25) < 2 << 25)
- bytes = odd + 12;
- else if (off - odd + (1ULL << 33) < 1ULL << 34)
- bytes = odd + 16;
- else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32)
- bytes = 28;
- else
- bytes = 32;
- if (!(p->second.toc_ && this->targ_->power10_stubs_auto()))
- return bytes;
- p->second.tocoff_ = bytes;
- }
- else
- {
- off -= 8;
- if (off + 0x8000 < 0x10000)
- return 24;
- if (off + 0x80008000ULL < 0x100000000ULL)
- {
- if (off + 24 + (1 << 25) < 2 << 25)
- return 28;
- return 32;
- }
- bytes = 32;
- if (off + 0x800000000000ULL >= 0x1000000000000ULL
- && ((off >> 32) & 0xffff) != 0)
- bytes += 4;
- if (((off >> 32) & 0xffffffffULL) != 0)
- bytes += 4;
- if (hi(off) != 0)
- bytes += 4;
- if (l(off) != 0)
- bytes += 4;
- return bytes;
- }
- }
- off += elfcpp::ppc64_decode_local_entry(p->second.other_);
- if (off + (1 << 25) < 2 << 25)
- return bytes + 4;
- if (!this->targ_->power10_stubs()
- || (p->second.toc_ && this->targ_->power10_stubs_auto()))
- *need_lt = true;
- return bytes + 16;
- }
- template<int size, bool big_endian>
- void
- Stub_table<size, big_endian>::plt_error(const Plt_stub_key& p)
- {
- if (p.sym_)
- gold_error(_("linkage table error against `%s'"),
- p.sym_->demangled_name().c_str());
- else
- gold_error(_("linkage table error against `%s:[local %u]'"),
- p.object_->name().c_str(),
- p.locsym_);
- }
- // Write out plt and long branch stub code.
- template<int size, bool big_endian>
- void
- Stub_table<size, big_endian>::do_write(Output_file* of)
- {
- if (this->plt_call_stubs_.empty()
- && this->long_branch_stubs_.empty())
- return;
- const section_size_type start_off = this->offset();
- const section_size_type off = this->stub_offset();
- const section_size_type oview_size =
- convert_to_section_size_type(this->data_size() - (off - start_off));
- unsigned char* const oview = of->get_output_view(off, oview_size);
- unsigned char* p;
- if (size == 64
- && this->targ_->power10_stubs())
- {
- if (!this->plt_call_stubs_.empty())
- {
- // Write out plt call stubs.
- typename Plt_stub_entries::const_iterator cs;
- for (cs = this->plt_call_stubs_.begin();
- cs != this->plt_call_stubs_.end();
- ++cs)
- {
- p = oview + cs->second.off_;
- const Output_data_plt_powerpc<size, big_endian>* plt;
- Address pltoff = this->plt_off(cs, &plt);
- Address plt_addr = pltoff + plt->address();
- if (this->targ_->power10_stubs_auto())
- {
- if (cs->second.notoc_)
- {
- if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- this->build_tls_opt_head(&p, false);
- Address from = this->stub_address() + (p - oview);
- Address delta = plt_addr - from;
- p = build_power10_offset<big_endian>(p, delta, from & 4,
- true);
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- write_insn<big_endian>(p, bctr);
- p += 4;
- p = oview + this->plt_call_align(p - oview);
- }
- if (cs->second.toc_)
- {
- if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- {
- bool save_lr
- = cs->second.r2save_ && !cs->second.localentry0_;
- this->build_tls_opt_head(&p, save_lr);
- }
- Address got_addr = this->targ_->toc_pointer();
- Address off = plt_addr - got_addr;
- if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
- this->plt_error(cs->first);
- if (cs->second.r2save_)
- {
- write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
- p += 4;
- }
- if (ha(off) != 0)
- {
- write_insn<big_endian>(p, addis_12_2 + ha(off));
- p += 4;
- write_insn<big_endian>(p, ld_12_12 + l(off));
- p += 4;
- }
- else
- {
- write_insn<big_endian>(p, ld_12_2 + l(off));
- p += 4;
- }
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- if (cs->second.r2save_
- && !cs->second.localentry0_
- && this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- this->build_tls_opt_tail(p);
- else
- write_insn<big_endian>(p, bctr);
- }
- if (cs->second.p9notoc_)
- {
- if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- this->build_tls_opt_head(&p, false);
- Address from = this->stub_address() + (p - oview);
- Address delta = plt_addr - from;
- p = build_notoc_offset<big_endian>(p, delta, true);
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- write_insn<big_endian>(p, bctr);
- p += 4;
- p = oview + this->plt_call_align(p - oview);
- }
- }
- else
- {
- if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- {
- bool save_lr
- = cs->second.r2save_ && !cs->second.localentry0_;
- this->build_tls_opt_head(&p, save_lr);
- }
- if (cs->second.r2save_)
- {
- write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
- p += 4;
- }
- Address from = this->stub_address() + (p - oview);
- Address delta = plt_addr - from;
- p = build_power10_offset<big_endian>(p, delta, from & 4, true);
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- if (cs->second.r2save_
- && !cs->second.localentry0_
- && this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- this->build_tls_opt_tail(p);
- else
- write_insn<big_endian>(p, bctr);
- }
- }
- }
- // Write out long branch stubs.
- typename Branch_stub_entries::const_iterator bs;
- for (bs = this->long_branch_stubs_.begin();
- bs != this->long_branch_stubs_.end();
- ++bs)
- {
- if (bs->second.save_res_)
- continue;
- Address off = this->plt_size_ + bs->second.off_;
- p = oview + off;
- Address loc = this->stub_address() + off;
- Address delta = bs->first.dest_ - loc;
- if (this->targ_->power10_stubs_auto())
- {
- if (bs->second.notoc_)
- {
- unsigned char* startp = p;
- p = build_power10_offset<big_endian>(p, delta,
- loc & 4, false);
- delta -= p - startp;
- startp = p;
- if (delta + (1 << 25) < 2 << 25)
- write_insn<big_endian>(p, b | (delta & 0x3fffffc));
- else
- {
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- write_insn<big_endian>(p, bctr);
- }
- p += 4;
- delta -= p - startp;
- }
- if (bs->second.toc_)
- {
- delta += elfcpp::ppc64_decode_local_entry(bs->second.other_);
- if (delta + (1 << 25) >= 2 << 25)
- {
- Address brlt_addr
- = this->targ_->find_branch_lookup_table(bs->first.dest_);
- gold_assert(brlt_addr != invalid_address);
- brlt_addr += this->targ_->brlt_section()->address();
- Address got_addr = this->targ_->toc_pointer();
- Address brltoff = brlt_addr - got_addr;
- if (ha(brltoff) == 0)
- {
- write_insn<big_endian>(p, ld_12_2 + l(brltoff));
- p += 4;
- }
- else
- {
- write_insn<big_endian>(p, addis_12_2 + ha(brltoff));
- p += 4;
- write_insn<big_endian>(p, ld_12_12 + l(brltoff));
- p += 4;
- }
- }
- if (delta + (1 << 25) < 2 << 25)
- write_insn<big_endian>(p, b | (delta & 0x3fffffc));
- else
- {
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- write_insn<big_endian>(p, bctr);
- }
- }
- if (bs->second.p9notoc_)
- {
- unsigned char* startp = p;
- p = build_notoc_offset<big_endian>(p, delta, false);
- delta -= p - startp;
- startp = p;
- if (delta + (1 << 25) < 2 << 25)
- write_insn<big_endian>(p, b | (delta & 0x3fffffc));
- else
- {
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- write_insn<big_endian>(p, bctr);
- }
- p += 4;
- delta -= p - startp;
- }
- }
- else
- {
- if (!bs->second.notoc_)
- delta += elfcpp::ppc64_decode_local_entry(bs->second.other_);
- if (bs->second.notoc_ || delta + (1 << 25) >= 2 << 25)
- {
- unsigned char* startp = p;
- p = build_power10_offset<big_endian>(p, delta,
- loc & 4, false);
- delta -= p - startp;
- }
- if (delta + (1 << 25) < 2 << 25)
- write_insn<big_endian>(p, b | (delta & 0x3fffffc));
- else
- {
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- write_insn<big_endian>(p, bctr);
- }
- }
- }
- }
- else if (size == 64)
- {
- if (!this->plt_call_stubs_.empty()
- && this->targ_->abiversion() >= 2)
- {
- // Write out plt call stubs for ELFv2.
- typename Plt_stub_entries::const_iterator cs;
- for (cs = this->plt_call_stubs_.begin();
- cs != this->plt_call_stubs_.end();
- ++cs)
- {
- const Output_data_plt_powerpc<size, big_endian>* plt;
- Address pltoff = this->plt_off(cs, &plt);
- Address plt_addr = pltoff + plt->address();
- p = oview + cs->second.off_;
- if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- {
- bool save_lr = cs->second.r2save_ && !cs->second.localentry0_;
- this->build_tls_opt_head(&p, save_lr);
- }
- if (cs->second.r2save_)
- {
- write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
- p += 4;
- }
- if (cs->second.p9notoc_)
- {
- Address from = this->stub_address() + (p - oview) + 8;
- Address off = plt_addr - from;
- p = build_notoc_offset<big_endian>(p, off, true);
- }
- else
- {
- Address got_addr = this->targ_->toc_pointer();
- Address off = plt_addr - got_addr;
- if (off + 0x80008000 > 0xffffffff || (off & 7) != 0)
- this->plt_error(cs->first);
- if (ha(off) != 0)
- {
- write_insn<big_endian>(p, addis_12_2 + ha(off));
- p += 4;
- write_insn<big_endian>(p, ld_12_12 + l(off));
- p += 4;
- }
- else
- {
- write_insn<big_endian>(p, ld_12_2 + l(off));
- p += 4;
- }
- }
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- if (cs->second.r2save_
- && !cs->second.localentry0_
- && this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- this->build_tls_opt_tail(p);
- else
- write_insn<big_endian>(p, bctr);
- }
- }
- else if (!this->plt_call_stubs_.empty())
- {
- // Write out plt call stubs for ELFv1.
- typename Plt_stub_entries::const_iterator cs;
- for (cs = this->plt_call_stubs_.begin();
- cs != this->plt_call_stubs_.end();
- ++cs)
- {
- const Output_data_plt_powerpc<size, big_endian>* plt;
- Address pltoff = this->plt_off(cs, &plt);
- Address plt_addr = pltoff + plt->address();
- Address got_addr = this->targ_->toc_pointer();
- Address off = plt_addr - got_addr;
- if (off + 0x80008000 > 0xffffffff || (off & 7) != 0
- || cs->second.notoc_)
- this->plt_error(cs->first);
- bool static_chain = parameters->options().plt_static_chain();
- bool thread_safe = this->targ_->plt_thread_safe();
- bool use_fake_dep = false;
- Address cmp_branch_off = 0;
- if (thread_safe)
- {
- unsigned int pltindex
- = ((pltoff - this->targ_->first_plt_entry_offset())
- / this->targ_->plt_entry_size());
- Address glinkoff
- = (this->targ_->glink_section()->pltresolve_size()
- + pltindex * 8);
- if (pltindex > 32768)
- glinkoff += (pltindex - 32768) * 4;
- Address to
- = this->targ_->glink_section()->address() + glinkoff;
- Address from
- = (this->stub_address() + cs->second.off_ + 20
- + 4 * cs->second.r2save_
- + 4 * (ha(off) != 0)
- + 4 * (ha(off + 8 + 8 * static_chain) != ha(off))
- + 4 * static_chain);
- cmp_branch_off = to - from;
- use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26);
- }
- p = oview + cs->second.off_;
- if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- {
- bool save_lr = cs->second.r2save_ && !cs->second.localentry0_;
- this->build_tls_opt_head(&p, save_lr);
- use_fake_dep = thread_safe;
- }
- if (cs->second.r2save_)
- {
- write_insn<big_endian>(p, std_2_1 + this->targ_->stk_toc());
- p += 4;
- }
- if (ha(off) != 0)
- {
- write_insn<big_endian>(p, addis_11_2 + ha(off));
- p += 4;
- write_insn<big_endian>(p, ld_12_11 + l(off));
- p += 4;
- if (ha(off + 8 + 8 * static_chain) != ha(off))
- {
- write_insn<big_endian>(p, addi_11_11 + l(off));
- p += 4;
- off = 0;
- }
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- if (use_fake_dep)
- {
- write_insn<big_endian>(p, xor_2_12_12);
- p += 4;
- write_insn<big_endian>(p, add_11_11_2);
- p += 4;
- }
- write_insn<big_endian>(p, ld_2_11 + l(off + 8));
- p += 4;
- if (static_chain)
- {
- write_insn<big_endian>(p, ld_11_11 + l(off + 16));
- p += 4;
- }
- }
- else
- {
- write_insn<big_endian>(p, ld_12_2 + l(off));
- p += 4;
- if (ha(off + 8 + 8 * static_chain) != ha(off))
- {
- write_insn<big_endian>(p, addi_2_2 + l(off));
- p += 4;
- off = 0;
- }
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- if (use_fake_dep)
- {
- write_insn<big_endian>(p, xor_11_12_12);
- p += 4;
- write_insn<big_endian>(p, add_2_2_11);
- p += 4;
- }
- if (static_chain)
- {
- write_insn<big_endian>(p, ld_11_2 + l(off + 16));
- p += 4;
- }
- write_insn<big_endian>(p, ld_2_2 + l(off + 8));
- p += 4;
- }
- if (cs->second.r2save_
- && !cs->second.localentry0_
- && this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- this->build_tls_opt_tail(p);
- else if (thread_safe && !use_fake_dep)
- {
- write_insn<big_endian>(p, cmpldi_2_0);
- p += 4;
- write_insn<big_endian>(p, bnectr_p4);
- p += 4;
- write_insn<big_endian>(p, b | (cmp_branch_off & 0x3fffffc));
- }
- else
- write_insn<big_endian>(p, bctr);
- }
- }
- // Write out long branch stubs.
- typename Branch_stub_entries::const_iterator bs;
- for (bs = this->long_branch_stubs_.begin();
- bs != this->long_branch_stubs_.end();
- ++bs)
- {
- if (bs->second.save_res_)
- continue;
- Address off = this->plt_size_ + bs->second.off_;
- p = oview + off;
- Address loc = this->stub_address() + off;
- Address delta = bs->first.dest_ - loc;
- if (!bs->second.p9notoc_)
- delta += elfcpp::ppc64_decode_local_entry(bs->second.other_);
- if (bs->second.p9notoc_)
- {
- unsigned char* startp = p;
- p = build_notoc_offset<big_endian>(p, off, false);
- delta -= p - startp;
- }
- else if (delta + (1 << 25) >= 2 << 25)
- {
- Address brlt_addr
- = this->targ_->find_branch_lookup_table(bs->first.dest_);
- gold_assert(brlt_addr != invalid_address);
- brlt_addr += this->targ_->brlt_section()->address();
- Address got_addr = this->targ_->toc_pointer();
- Address brltoff = brlt_addr - got_addr;
- if (ha(brltoff) == 0)
- {
- write_insn<big_endian>(p, ld_12_2 + l(brltoff));
- p += 4;
- }
- else
- {
- write_insn<big_endian>(p, addis_12_2 + ha(brltoff));
- p += 4;
- write_insn<big_endian>(p, ld_12_12 + l(brltoff));
- p += 4;
- }
- }
- if (delta + (1 << 25) < 2 << 25)
- write_insn<big_endian>(p, b | (delta & 0x3fffffc));
- else
- {
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- write_insn<big_endian>(p, bctr);
- }
- }
- }
- else // size == 32
- {
- if (!this->plt_call_stubs_.empty())
- {
- // The address of _GLOBAL_OFFSET_TABLE_.
- Address g_o_t = invalid_address;
- // Write out plt call stubs.
- typename Plt_stub_entries::const_iterator cs;
- for (cs = this->plt_call_stubs_.begin();
- cs != this->plt_call_stubs_.end();
- ++cs)
- {
- const Output_data_plt_powerpc<size, big_endian>* plt;
- Address plt_addr = this->plt_off(cs, &plt);
- plt_addr += plt->address();
- p = oview + cs->second.off_;
- if (this->targ_->is_tls_get_addr_opt(cs->first.sym_))
- this->build_tls_opt_head(&p, false);
- if (parameters->options().output_is_position_independent())
- {
- Address got_addr;
- const Powerpc_relobj<size, big_endian>* ppcobj
- = (static_cast<const Powerpc_relobj<size, big_endian>*>
- (cs->first.object_));
- if (ppcobj != NULL && cs->first.addend_ >= 32768)
- {
- unsigned int got2 = ppcobj->got2_shndx();
- got_addr = ppcobj->get_output_section_offset(got2);
- gold_assert(got_addr != invalid_address);
- got_addr += (ppcobj->output_section(got2)->address()
- + cs->first.addend_);
- }
- else
- {
- if (g_o_t == invalid_address)
- g_o_t = this->targ_->toc_pointer();
- got_addr = g_o_t;
- }
- Address off = plt_addr - got_addr;
- if (ha(off) == 0)
- write_insn<big_endian>(p, lwz_11_30 + l(off));
- else
- {
- write_insn<big_endian>(p, addis_11_30 + ha(off));
- p += 4;
- write_insn<big_endian>(p, lwz_11_11 + l(off));
- }
- }
- else
- {
- write_insn<big_endian>(p, lis_11 + ha(plt_addr));
- p += 4;
- write_insn<big_endian>(p, lwz_11_11 + l(plt_addr));
- }
- p += 4;
- write_insn<big_endian>(p, mtctr_11);
- p += 4;
- write_insn<big_endian>(p, bctr);
- }
- }
- // Write out long branch stubs.
- typename Branch_stub_entries::const_iterator bs;
- for (bs = this->long_branch_stubs_.begin();
- bs != this->long_branch_stubs_.end();
- ++bs)
- {
- if (bs->second.save_res_)
- continue;
- Address off = this->plt_size_ + bs->second.off_;
- p = oview + off;
- Address loc = this->stub_address() + off;
- Address delta = bs->first.dest_ - loc;
- if (delta + (1 << 25) < 2 << 25)
- write_insn<big_endian>(p, b | (delta & 0x3fffffc));
- else if (!parameters->options().output_is_position_independent())
- {
- write_insn<big_endian>(p, lis_12 + ha(bs->first.dest_));
- p += 4;
- write_insn<big_endian>(p, addi_12_12 + l(bs->first.dest_));
- }
- else
- {
- delta -= 8;
- write_insn<big_endian>(p, mflr_0);
- p += 4;
- write_insn<big_endian>(p, bcl_20_31);
- p += 4;
- write_insn<big_endian>(p, mflr_12);
- p += 4;
- write_insn<big_endian>(p, addis_12_12 + ha(delta));
- p += 4;
- write_insn<big_endian>(p, addi_12_12 + l(delta));
- p += 4;
- write_insn<big_endian>(p, mtlr_0);
- }
- p += 4;
- write_insn<big_endian>(p, mtctr_12);
- p += 4;
- write_insn<big_endian>(p, bctr);
- }
- }
- if (this->need_save_res_)
- {
- p = oview + this->plt_size_ + this->branch_size_;
- memcpy (p, this->targ_->savres_section()->contents(),
- this->targ_->savres_section()->data_size());
- }
- }
- // Write out .glink.
- template<int size, bool big_endian>
- void
- Output_data_glink<size, big_endian>::do_write(Output_file* of)
- {
- const section_size_type off = this->offset();
- const section_size_type oview_size =
- convert_to_section_size_type(this->data_size());
- unsigned char* const oview = of->get_output_view(off, oview_size);
- unsigned char* p;
- // The base address of the .plt section.
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- Address plt_base = this->targ_->plt_section()->address();
- if (size == 64)
- {
- if (this->end_branch_table_ != 0)
- {
- // Write pltresolve stub.
- p = oview;
- Address after_bcl = this->address() + 16;
- Address pltoff = plt_base - after_bcl;
- elfcpp::Swap<64, big_endian>::writeval(p, pltoff), p += 8;
- if (this->targ_->abiversion() < 2)
- {
- write_insn<big_endian>(p, mflr_12), p += 4;
- write_insn<big_endian>(p, bcl_20_31), p += 4;
- write_insn<big_endian>(p, mflr_11), p += 4;
- write_insn<big_endian>(p, ld_2_11 + l(-16)), p += 4;
- write_insn<big_endian>(p, mtlr_12), p += 4;
- write_insn<big_endian>(p, add_11_2_11), p += 4;
- write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
- write_insn<big_endian>(p, ld_2_11 + 8), p += 4;
- write_insn<big_endian>(p, mtctr_12), p += 4;
- write_insn<big_endian>(p, ld_11_11 + 16), p += 4;
- }
- else
- {
- if (this->targ_->has_localentry0())
- {
- write_insn<big_endian>(p, std_2_1 + 24), p += 4;
- }
- write_insn<big_endian>(p, mflr_0), p += 4;
- write_insn<big_endian>(p, bcl_20_31), p += 4;
- write_insn<big_endian>(p, mflr_11), p += 4;
- write_insn<big_endian>(p, mtlr_0), p += 4;
- if (this->targ_->has_localentry0())
- {
- write_insn<big_endian>(p, ld_0_11 + l(-20)), p += 4;
- }
- else
- {
- write_insn<big_endian>(p, ld_0_11 + l(-16)), p += 4;
- }
- write_insn<big_endian>(p, sub_12_12_11), p += 4;
- write_insn<big_endian>(p, add_11_0_11), p += 4;
- write_insn<big_endian>(p, addi_0_12 + l(-44)), p += 4;
- write_insn<big_endian>(p, ld_12_11 + 0), p += 4;
- write_insn<big_endian>(p, srdi_0_0_2), p += 4;
- write_insn<big_endian>(p, mtctr_12), p += 4;
- write_insn<big_endian>(p, ld_11_11 + 8), p += 4;
- }
- write_insn<big_endian>(p, bctr), p += 4;
- gold_assert(p == oview + this->pltresolve_size());
- // Write lazy link call stubs.
- uint32_t indx = 0;
- while (p < oview + this->end_branch_table_)
- {
- if (this->targ_->abiversion() < 2)
- {
- if (indx < 0x8000)
- {
- write_insn<big_endian>(p, li_0_0 + indx), p += 4;
- }
- else
- {
- write_insn<big_endian>(p, lis_0 + hi(indx)), p += 4;
- write_insn<big_endian>(p, ori_0_0_0 + l(indx)), p += 4;
- }
- }
- uint32_t branch_off = 8 - (p - oview);
- write_insn<big_endian>(p, b + (branch_off & 0x3fffffc)), p += 4;
- indx++;
- }
- }
- Address plt_base = this->targ_->plt_section()->address();
- Address iplt_base = invalid_address;
- unsigned int global_entry_off = this->global_entry_off();
- Address global_entry_base = this->address() + global_entry_off;
- typename Global_entry_stub_entries::const_iterator ge;
- for (ge = this->global_entry_stubs_.begin();
- ge != this->global_entry_stubs_.end();
- ++ge)
- {
- p = oview + global_entry_off + ge->second;
- Address plt_addr = ge->first->plt_offset();
- if (ge->first->type() == elfcpp::STT_GNU_IFUNC
- && ge->first->can_use_relative_reloc(false))
- {
- if (iplt_base == invalid_address)
- iplt_base = this->targ_->iplt_section()->address();
- plt_addr += iplt_base;
- }
- else
- plt_addr += plt_base;
- Address my_addr = global_entry_base + ge->second;
- Address off = plt_addr - my_addr;
- if (off + 0x80008000 > 0xffffffff || (off & 3) != 0)
- gold_error(_("linkage table error against `%s'"),
- ge->first->demangled_name().c_str());
- write_insn<big_endian>(p, addis_12_12 + ha(off)), p += 4;
- write_insn<big_endian>(p, ld_12_12 + l(off)), p += 4;
- write_insn<big_endian>(p, mtctr_12), p += 4;
- write_insn<big_endian>(p, bctr);
- }
- }
- else
- {
- // The address of _GLOBAL_OFFSET_TABLE_.
- Address g_o_t = this->targ_->toc_pointer();
- // Write out pltresolve branch table.
- p = oview;
- unsigned int the_end = oview_size - this->pltresolve_size();
- unsigned char* end_p = oview + the_end;
- while (p < end_p - 8 * 4)
- write_insn<big_endian>(p, b + end_p - p), p += 4;
- while (p < end_p)
- write_insn<big_endian>(p, nop), p += 4;
- // Write out pltresolve call stub.
- end_p = oview + oview_size;
- if (parameters->options().output_is_position_independent())
- {
- Address res0_off = 0;
- Address after_bcl_off = the_end + 12;
- Address bcl_res0 = after_bcl_off - res0_off;
- write_insn<big_endian>(p, addis_11_11 + ha(bcl_res0));
- p += 4;
- write_insn<big_endian>(p, mflr_0);
- p += 4;
- write_insn<big_endian>(p, bcl_20_31);
- p += 4;
- write_insn<big_endian>(p, addi_11_11 + l(bcl_res0));
- p += 4;
- write_insn<big_endian>(p, mflr_12);
- p += 4;
- write_insn<big_endian>(p, mtlr_0);
- p += 4;
- write_insn<big_endian>(p, sub_11_11_12);
- p += 4;
- Address got_bcl = g_o_t + 4 - (after_bcl_off + this->address());
- write_insn<big_endian>(p, addis_12_12 + ha(got_bcl));
- p += 4;
- if (ha(got_bcl) == ha(got_bcl + 4))
- {
- write_insn<big_endian>(p, lwz_0_12 + l(got_bcl));
- p += 4;
- write_insn<big_endian>(p, lwz_12_12 + l(got_bcl + 4));
- }
- else
- {
- write_insn<big_endian>(p, lwzu_0_12 + l(got_bcl));
- p += 4;
- write_insn<big_endian>(p, lwz_12_12 + 4);
- }
- p += 4;
- write_insn<big_endian>(p, mtctr_0);
- p += 4;
- write_insn<big_endian>(p, add_0_11_11);
- p += 4;
- write_insn<big_endian>(p, add_11_0_11);
- }
- else
- {
- Address res0 = this->address();
- write_insn<big_endian>(p, lis_12 + ha(g_o_t + 4));
- p += 4;
- write_insn<big_endian>(p, addis_11_11 + ha(-res0));
- p += 4;
- if (ha(g_o_t + 4) == ha(g_o_t + 8))
- write_insn<big_endian>(p, lwz_0_12 + l(g_o_t + 4));
- else
- write_insn<big_endian>(p, lwzu_0_12 + l(g_o_t + 4));
- p += 4;
- write_insn<big_endian>(p, addi_11_11 + l(-res0));
- p += 4;
- write_insn<big_endian>(p, mtctr_0);
- p += 4;
- write_insn<big_endian>(p, add_0_11_11);
- p += 4;
- if (ha(g_o_t + 4) == ha(g_o_t + 8))
- write_insn<big_endian>(p, lwz_12_12 + l(g_o_t + 8));
- else
- write_insn<big_endian>(p, lwz_12_12 + 4);
- p += 4;
- write_insn<big_endian>(p, add_11_0_11);
- }
- p += 4;
- write_insn<big_endian>(p, bctr);
- p += 4;
- while (p < end_p)
- {
- write_insn<big_endian>(p, nop);
- p += 4;
- }
- }
- of->write_output_view(off, oview_size, oview);
- }
- // A class to handle linker generated save/restore functions.
- template<int size, bool big_endian>
- class Output_data_save_res : public Output_section_data_build
- {
- public:
- Output_data_save_res(Symbol_table* symtab);
- const unsigned char*
- contents() const
- {
- return contents_;
- }
- protected:
- // Write to a map file.
- void
- do_print_to_mapfile(Mapfile* mapfile) const
- { mapfile->print_output_data(this, _("** save/restore")); }
- void
- do_write(Output_file*);
- private:
- // The maximum size of save/restore contents.
- static const unsigned int savres_max = 218*4;
- void
- savres_define(Symbol_table* symtab,
- const char *name,
- unsigned int lo, unsigned int hi,
- unsigned char* write_ent(unsigned char*, int),
- unsigned char* write_tail(unsigned char*, int));
- unsigned char *contents_;
- };
- template<bool big_endian>
- static unsigned char*
- savegpr0(unsigned char* p, int r)
- {
- uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
- write_insn<big_endian>(p, insn);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- savegpr0_tail(unsigned char* p, int r)
- {
- p = savegpr0<big_endian>(p, r);
- uint32_t insn = std_0_1 + 16;
- write_insn<big_endian>(p, insn);
- p = p + 4;
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- restgpr0(unsigned char* p, int r)
- {
- uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
- write_insn<big_endian>(p, insn);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- restgpr0_tail(unsigned char* p, int r)
- {
- uint32_t insn = ld_0_1 + 16;
- write_insn<big_endian>(p, insn);
- p = p + 4;
- p = restgpr0<big_endian>(p, r);
- write_insn<big_endian>(p, mtlr_0);
- p = p + 4;
- if (r == 29)
- {
- p = restgpr0<big_endian>(p, 30);
- p = restgpr0<big_endian>(p, 31);
- }
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- savegpr1(unsigned char* p, int r)
- {
- uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
- write_insn<big_endian>(p, insn);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- savegpr1_tail(unsigned char* p, int r)
- {
- p = savegpr1<big_endian>(p, r);
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- restgpr1(unsigned char* p, int r)
- {
- uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
- write_insn<big_endian>(p, insn);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- restgpr1_tail(unsigned char* p, int r)
- {
- p = restgpr1<big_endian>(p, r);
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- savefpr(unsigned char* p, int r)
- {
- uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
- write_insn<big_endian>(p, insn);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- savefpr0_tail(unsigned char* p, int r)
- {
- p = savefpr<big_endian>(p, r);
- write_insn<big_endian>(p, std_0_1 + 16);
- p = p + 4;
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- restfpr(unsigned char* p, int r)
- {
- uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
- write_insn<big_endian>(p, insn);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- restfpr0_tail(unsigned char* p, int r)
- {
- write_insn<big_endian>(p, ld_0_1 + 16);
- p = p + 4;
- p = restfpr<big_endian>(p, r);
- write_insn<big_endian>(p, mtlr_0);
- p = p + 4;
- if (r == 29)
- {
- p = restfpr<big_endian>(p, 30);
- p = restfpr<big_endian>(p, 31);
- }
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- savefpr1_tail(unsigned char* p, int r)
- {
- p = savefpr<big_endian>(p, r);
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- restfpr1_tail(unsigned char* p, int r)
- {
- p = restfpr<big_endian>(p, r);
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- savevr(unsigned char* p, int r)
- {
- uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
- write_insn<big_endian>(p, insn);
- p = p + 4;
- insn = stvx_0_12_0 + (r << 21);
- write_insn<big_endian>(p, insn);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- savevr_tail(unsigned char* p, int r)
- {
- p = savevr<big_endian>(p, r);
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- restvr(unsigned char* p, int r)
- {
- uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
- write_insn<big_endian>(p, insn);
- p = p + 4;
- insn = lvx_0_12_0 + (r << 21);
- write_insn<big_endian>(p, insn);
- return p + 4;
- }
- template<bool big_endian>
- static unsigned char*
- restvr_tail(unsigned char* p, int r)
- {
- p = restvr<big_endian>(p, r);
- write_insn<big_endian>(p, blr);
- return p + 4;
- }
- template<int size, bool big_endian>
- Output_data_save_res<size, big_endian>::Output_data_save_res(
- Symbol_table* symtab)
- : Output_section_data_build(4),
- contents_(NULL)
- {
- this->savres_define(symtab,
- "_savegpr0_", 14, 31,
- savegpr0<big_endian>, savegpr0_tail<big_endian>);
- this->savres_define(symtab,
- "_restgpr0_", 14, 29,
- restgpr0<big_endian>, restgpr0_tail<big_endian>);
- this->savres_define(symtab,
- "_restgpr0_", 30, 31,
- restgpr0<big_endian>, restgpr0_tail<big_endian>);
- this->savres_define(symtab,
- "_savegpr1_", 14, 31,
- savegpr1<big_endian>, savegpr1_tail<big_endian>);
- this->savres_define(symtab,
- "_restgpr1_", 14, 31,
- restgpr1<big_endian>, restgpr1_tail<big_endian>);
- this->savres_define(symtab,
- "_savefpr_", 14, 31,
- savefpr<big_endian>, savefpr0_tail<big_endian>);
- this->savres_define(symtab,
- "_restfpr_", 14, 29,
- restfpr<big_endian>, restfpr0_tail<big_endian>);
- this->savres_define(symtab,
- "_restfpr_", 30, 31,
- restfpr<big_endian>, restfpr0_tail<big_endian>);
- this->savres_define(symtab,
- "._savef", 14, 31,
- savefpr<big_endian>, savefpr1_tail<big_endian>);
- this->savres_define(symtab,
- "._restf", 14, 31,
- restfpr<big_endian>, restfpr1_tail<big_endian>);
- this->savres_define(symtab,
- "_savevr_", 20, 31,
- savevr<big_endian>, savevr_tail<big_endian>);
- this->savres_define(symtab,
- "_restvr_", 20, 31,
- restvr<big_endian>, restvr_tail<big_endian>);
- }
- template<int size, bool big_endian>
- void
- Output_data_save_res<size, big_endian>::savres_define(
- Symbol_table* symtab,
- const char *name,
- unsigned int lo, unsigned int hi,
- unsigned char* write_ent(unsigned char*, int),
- unsigned char* write_tail(unsigned char*, int))
- {
- size_t len = strlen(name);
- bool writing = false;
- char sym[16];
- memcpy(sym, name, len);
- sym[len + 2] = 0;
- for (unsigned int i = lo; i <= hi; i++)
- {
- sym[len + 0] = i / 10 + '0';
- sym[len + 1] = i % 10 + '0';
- Symbol* gsym = symtab->lookup(sym);
- bool refd = gsym != NULL && gsym->is_undefined();
- writing = writing || refd;
- if (writing)
- {
- if (this->contents_ == NULL)
- this->contents_ = new unsigned char[this->savres_max];
- section_size_type value = this->current_data_size();
- unsigned char* p = this->contents_ + value;
- if (i != hi)
- p = write_ent(p, i);
- else
- p = write_tail(p, i);
- section_size_type cur_size = p - this->contents_;
- this->set_current_data_size(cur_size);
- if (refd)
- symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
- this, value, cur_size - value,
- elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
- elfcpp::STV_HIDDEN, 0, false, false);
- }
- }
- }
- // Write out save/restore.
- template<int size, bool big_endian>
- void
- Output_data_save_res<size, big_endian>::do_write(Output_file* of)
- {
- const section_size_type off = this->offset();
- const section_size_type oview_size =
- convert_to_section_size_type(this->data_size());
- unsigned char* const oview = of->get_output_view(off, oview_size);
- memcpy(oview, this->contents_, oview_size);
- of->write_output_view(off, oview_size, oview);
- }
- // Create the glink section.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::make_glink_section(Layout* layout)
- {
- if (this->glink_ == NULL)
- {
- this->glink_ = new Output_data_glink<size, big_endian>(this);
- this->glink_->add_eh_frame(layout);
- layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
- elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
- this->glink_, ORDER_TEXT, false);
- }
- }
- // Create a PLT entry for a global symbol.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
- Layout* layout,
- Symbol* gsym)
- {
- if (gsym->type() == elfcpp::STT_GNU_IFUNC
- && gsym->can_use_relative_reloc(false))
- {
- if (this->iplt_ == NULL)
- this->make_iplt_section(symtab, layout);
- this->iplt_->add_ifunc_entry(gsym);
- }
- else
- {
- if (this->plt_ == NULL)
- this->make_plt_section(symtab, layout);
- this->plt_->add_entry(gsym);
- }
- }
- // Make a PLT entry for a local symbol.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::make_local_plt_entry(
- Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* relobj,
- unsigned int r_sym)
- {
- if (this->lplt_ == NULL)
- this->make_lplt_section(symtab, layout);
- this->lplt_->add_local_entry(relobj, r_sym);
- }
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::make_local_plt_entry(Symbol_table* symtab,
- Layout* layout,
- Symbol* gsym)
- {
- if (this->lplt_ == NULL)
- this->make_lplt_section(symtab, layout);
- this->lplt_->add_entry(gsym, true);
- }
- // Make a PLT entry for a local STT_GNU_IFUNC symbol.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::make_local_ifunc_plt_entry(
- Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* relobj,
- unsigned int r_sym)
- {
- if (this->iplt_ == NULL)
- this->make_iplt_section(symtab, layout);
- this->iplt_->add_local_ifunc_entry(relobj, r_sym);
- }
- // Return the number of entries in the PLT.
- template<int size, bool big_endian>
- unsigned int
- Target_powerpc<size, big_endian>::plt_entry_count() const
- {
- if (this->plt_ == NULL)
- return 0;
- return this->plt_->entry_count();
- }
- // Create a GOT entry for local dynamic __tls_get_addr calls.
- template<int size, bool big_endian>
- unsigned int
- Target_powerpc<size, big_endian>::tlsld_got_offset(
- Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object)
- {
- if (this->tlsld_got_offset_ == -1U)
- {
- gold_assert(symtab != NULL && layout != NULL && object != NULL);
- Reloc_section* rela_dyn = this->rela_dyn_section(layout);
- Output_data_got_powerpc<size, big_endian>* got
- = this->got_section(symtab, layout, GOT_TYPE_SMALL);
- unsigned int got_offset = got->add_constant_pair(0, 0);
- rela_dyn->add_local(object, 0, elfcpp::R_POWERPC_DTPMOD, got,
- got_offset, 0);
- this->tlsld_got_offset_ = got_offset;
- }
- return this->tlsld_got_offset_;
- }
- // Get the Reference_flags for a particular relocation.
- template<int size, bool big_endian>
- int
- Target_powerpc<size, big_endian>::Scan::get_reference_flags(
- unsigned int r_type,
- const Target_powerpc* target)
- {
- int ref = 0;
- switch (r_type)
- {
- case elfcpp::R_POWERPC_NONE:
- case elfcpp::R_POWERPC_GNU_VTINHERIT:
- case elfcpp::R_POWERPC_GNU_VTENTRY:
- case elfcpp::R_PPC64_TOC:
- // No symbol reference.
- break;
- case elfcpp::R_PPC64_ADDR64:
- case elfcpp::R_PPC64_UADDR64:
- case elfcpp::R_POWERPC_ADDR32:
- case elfcpp::R_POWERPC_UADDR32:
- case elfcpp::R_POWERPC_ADDR16:
- case elfcpp::R_POWERPC_UADDR16:
- case elfcpp::R_POWERPC_ADDR16_LO:
- case elfcpp::R_POWERPC_ADDR16_HI:
- case elfcpp::R_POWERPC_ADDR16_HA:
- case elfcpp::R_PPC64_ADDR16_HIGHER34:
- case elfcpp::R_PPC64_ADDR16_HIGHERA34:
- case elfcpp::R_PPC64_ADDR16_HIGHEST34:
- case elfcpp::R_PPC64_ADDR16_HIGHESTA34:
- case elfcpp::R_PPC64_D34:
- case elfcpp::R_PPC64_D34_LO:
- case elfcpp::R_PPC64_D34_HI30:
- case elfcpp::R_PPC64_D34_HA30:
- case elfcpp::R_PPC64_D28:
- ref = Symbol::ABSOLUTE_REF;
- break;
- case elfcpp::R_POWERPC_ADDR24:
- case elfcpp::R_POWERPC_ADDR14:
- case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
- case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
- ref = Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
- break;
- case elfcpp::R_PPC64_REL64:
- case elfcpp::R_POWERPC_REL32:
- case elfcpp::R_PPC_LOCAL24PC:
- case elfcpp::R_POWERPC_REL16:
- case elfcpp::R_POWERPC_REL16_LO:
- case elfcpp::R_POWERPC_REL16_HI:
- case elfcpp::R_POWERPC_REL16_HA:
- case elfcpp::R_PPC64_REL16_HIGH:
- case elfcpp::R_PPC64_REL16_HIGHA:
- case elfcpp::R_PPC64_REL16_HIGHER:
- case elfcpp::R_PPC64_REL16_HIGHERA:
- case elfcpp::R_PPC64_REL16_HIGHEST:
- case elfcpp::R_PPC64_REL16_HIGHESTA:
- case elfcpp::R_PPC64_PCREL34:
- case elfcpp::R_PPC64_REL16_HIGHER34:
- case elfcpp::R_PPC64_REL16_HIGHERA34:
- case elfcpp::R_PPC64_REL16_HIGHEST34:
- case elfcpp::R_PPC64_REL16_HIGHESTA34:
- case elfcpp::R_PPC64_PCREL28:
- ref = Symbol::RELATIVE_REF;
- break;
- case elfcpp::R_PPC64_REL24_NOTOC:
- if (size == 32)
- break;
- // Fall through.
- case elfcpp::R_PPC64_REL24_P9NOTOC:
- case elfcpp::R_POWERPC_REL24:
- case elfcpp::R_PPC_PLTREL24:
- case elfcpp::R_POWERPC_REL14:
- case elfcpp::R_POWERPC_REL14_BRTAKEN:
- case elfcpp::R_POWERPC_REL14_BRNTAKEN:
- case elfcpp::R_POWERPC_PLT16_LO:
- case elfcpp::R_POWERPC_PLT16_HI:
- case elfcpp::R_POWERPC_PLT16_HA:
- case elfcpp::R_PPC64_PLT16_LO_DS:
- case elfcpp::R_POWERPC_PLTSEQ:
- case elfcpp::R_PPC64_PLTSEQ_NOTOC:
- case elfcpp::R_POWERPC_PLTCALL:
- case elfcpp::R_PPC64_PLTCALL_NOTOC:
- case elfcpp::R_PPC64_PLT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34_NOTOC:
- ref = Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
- break;
- case elfcpp::R_POWERPC_GOT16:
- case elfcpp::R_POWERPC_GOT16_LO:
- case elfcpp::R_POWERPC_GOT16_HI:
- case elfcpp::R_POWERPC_GOT16_HA:
- case elfcpp::R_PPC64_GOT16_DS:
- case elfcpp::R_PPC64_GOT16_LO_DS:
- case elfcpp::R_PPC64_GOT_PCREL34:
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_PPC64_TOC16_HI:
- case elfcpp::R_PPC64_TOC16_HA:
- case elfcpp::R_PPC64_TOC16_DS:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- ref = Symbol::RELATIVE_REF;
- break;
- case elfcpp::R_POWERPC_GOT_TPREL16:
- case elfcpp::R_POWERPC_TLS:
- case elfcpp::R_PPC64_TLSGD:
- case elfcpp::R_PPC64_TLSLD:
- case elfcpp::R_PPC64_TPREL34:
- case elfcpp::R_PPC64_DTPREL34:
- case elfcpp::R_PPC64_GOT_TLSGD_PCREL34:
- case elfcpp::R_PPC64_GOT_TLSLD_PCREL34:
- case elfcpp::R_PPC64_GOT_TPREL_PCREL34:
- case elfcpp::R_PPC64_GOT_DTPREL_PCREL34:
- ref = Symbol::TLS_REF;
- break;
- case elfcpp::R_POWERPC_COPY:
- case elfcpp::R_POWERPC_GLOB_DAT:
- case elfcpp::R_POWERPC_JMP_SLOT:
- case elfcpp::R_POWERPC_RELATIVE:
- case elfcpp::R_POWERPC_DTPMOD:
- default:
- // Not expected. We will give an error later.
- break;
- }
- if (size == 64 && target->abiversion() < 2)
- ref |= Symbol::FUNC_DESC_ABI;
- return ref;
- }
- // Report an unsupported relocation against a local symbol.
- template<int size, bool big_endian>
- void
- Target_powerpc<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);
- }
- // We are about to emit a dynamic relocation of type R_TYPE. If the
- // dynamic linker does not support it, issue an error.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
- unsigned int r_type)
- {
- gold_assert(r_type != elfcpp::R_POWERPC_NONE);
- // These are the relocation types supported by glibc for both 32-bit
- // and 64-bit powerpc.
- switch (r_type)
- {
- case elfcpp::R_POWERPC_NONE:
- case elfcpp::R_POWERPC_RELATIVE:
- case elfcpp::R_POWERPC_GLOB_DAT:
- case elfcpp::R_POWERPC_DTPMOD:
- case elfcpp::R_POWERPC_DTPREL:
- case elfcpp::R_POWERPC_TPREL:
- case elfcpp::R_POWERPC_JMP_SLOT:
- case elfcpp::R_POWERPC_COPY:
- case elfcpp::R_POWERPC_IRELATIVE:
- case elfcpp::R_POWERPC_ADDR32:
- case elfcpp::R_POWERPC_UADDR32:
- case elfcpp::R_POWERPC_ADDR24:
- case elfcpp::R_POWERPC_ADDR16:
- case elfcpp::R_POWERPC_UADDR16:
- case elfcpp::R_POWERPC_ADDR16_LO:
- case elfcpp::R_POWERPC_ADDR16_HI:
- case elfcpp::R_POWERPC_ADDR16_HA:
- case elfcpp::R_POWERPC_ADDR14:
- case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
- case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
- case elfcpp::R_POWERPC_REL32:
- case elfcpp::R_POWERPC_TPREL16:
- case elfcpp::R_POWERPC_TPREL16_LO:
- case elfcpp::R_POWERPC_TPREL16_HI:
- case elfcpp::R_POWERPC_TPREL16_HA:
- return;
- default:
- break;
- }
- if (size == 64)
- {
- switch (r_type)
- {
- // These are the relocation types supported only on 64-bit.
- case elfcpp::R_PPC64_ADDR64:
- case elfcpp::R_PPC64_UADDR64:
- case elfcpp::R_PPC64_JMP_IREL:
- case elfcpp::R_PPC64_ADDR16_DS:
- case elfcpp::R_PPC64_ADDR16_LO_DS:
- case elfcpp::R_PPC64_ADDR16_HIGH:
- case elfcpp::R_PPC64_ADDR16_HIGHA:
- case elfcpp::R_PPC64_ADDR16_HIGHER:
- case elfcpp::R_PPC64_ADDR16_HIGHEST:
- case elfcpp::R_PPC64_ADDR16_HIGHERA:
- case elfcpp::R_PPC64_ADDR16_HIGHESTA:
- case elfcpp::R_PPC64_REL64:
- case elfcpp::R_POWERPC_ADDR30:
- case elfcpp::R_PPC64_TPREL16_DS:
- case elfcpp::R_PPC64_TPREL16_LO_DS:
- case elfcpp::R_PPC64_TPREL16_HIGH:
- case elfcpp::R_PPC64_TPREL16_HIGHA:
- case elfcpp::R_PPC64_TPREL16_HIGHER:
- case elfcpp::R_PPC64_TPREL16_HIGHEST:
- case elfcpp::R_PPC64_TPREL16_HIGHERA:
- case elfcpp::R_PPC64_TPREL16_HIGHESTA:
- return;
- default:
- break;
- }
- }
- else
- {
- switch (r_type)
- {
- // These are the relocation types supported only on 32-bit.
- // ??? glibc ld.so doesn't need to support these.
- case elfcpp::R_POWERPC_REL24:
- case elfcpp::R_POWERPC_DTPREL16:
- case elfcpp::R_POWERPC_DTPREL16_LO:
- case elfcpp::R_POWERPC_DTPREL16_HI:
- case elfcpp::R_POWERPC_DTPREL16_HA:
- return;
- default:
- break;
- }
- }
- // This prevents us from issuing more than one error per reloc
- // section. But we can still wind up issuing more than one
- // error per object file.
- if (this->issued_non_pic_error_)
- return;
- gold_assert(parameters->options().output_is_position_independent());
- object->error(_("requires unsupported dynamic reloc; "
- "recompile with -fPIC"));
- this->issued_non_pic_error_ = true;
- return;
- }
- // Return whether we need to make a PLT entry for a relocation of the
- // given type against a STT_GNU_IFUNC symbol.
- template<int size, bool big_endian>
- bool
- Target_powerpc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
- Target_powerpc<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int r_type,
- bool report_err)
- {
- // In non-pic code any reference will resolve to the plt call stub
- // for the ifunc symbol.
- if ((size == 32 || target->abiversion() >= 2)
- && !parameters->options().output_is_position_independent())
- return true;
- switch (r_type)
- {
- // Word size refs from data sections are OK, but don't need a PLT entry.
- case elfcpp::R_POWERPC_ADDR32:
- case elfcpp::R_POWERPC_UADDR32:
- if (size == 32)
- return false;
- break;
- case elfcpp::R_PPC64_ADDR64:
- case elfcpp::R_PPC64_UADDR64:
- if (size == 64)
- return false;
- break;
- // GOT refs are good, but also don't need a PLT entry.
- case elfcpp::R_POWERPC_GOT16:
- case elfcpp::R_POWERPC_GOT16_LO:
- case elfcpp::R_POWERPC_GOT16_HI:
- case elfcpp::R_POWERPC_GOT16_HA:
- case elfcpp::R_PPC64_GOT16_DS:
- case elfcpp::R_PPC64_GOT16_LO_DS:
- case elfcpp::R_PPC64_GOT_PCREL34:
- return false;
- // PLT relocs are OK and need a PLT entry.
- case elfcpp::R_POWERPC_PLT16_LO:
- case elfcpp::R_POWERPC_PLT16_HI:
- case elfcpp::R_POWERPC_PLT16_HA:
- case elfcpp::R_PPC64_PLT16_LO_DS:
- case elfcpp::R_POWERPC_PLTSEQ:
- case elfcpp::R_POWERPC_PLTCALL:
- case elfcpp::R_PPC64_PLTSEQ_NOTOC:
- case elfcpp::R_PPC64_PLTCALL_NOTOC:
- case elfcpp::R_PPC64_PLT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34_NOTOC:
- return true;
- break;
- // Function calls are good, and these do need a PLT entry.
- case elfcpp::R_PPC64_REL24_NOTOC:
- if (size == 32)
- break;
- // Fall through.
- case elfcpp::R_PPC64_REL24_P9NOTOC:
- case elfcpp::R_POWERPC_ADDR24:
- case elfcpp::R_POWERPC_ADDR14:
- case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
- case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
- case elfcpp::R_POWERPC_REL24:
- case elfcpp::R_PPC_PLTREL24:
- case elfcpp::R_POWERPC_REL14:
- case elfcpp::R_POWERPC_REL14_BRTAKEN:
- case elfcpp::R_POWERPC_REL14_BRNTAKEN:
- return true;
- default:
- break;
- }
- // Anything else is a problem.
- // If we are building a static executable, the libc startup function
- // responsible for applying indirect function relocations is going
- // to complain about the reloc type.
- // If we are building a dynamic executable, we will have a text
- // relocation. The dynamic loader will set the text segment
- // writable and non-executable to apply text relocations. So we'll
- // segfault when trying to run the indirection function to resolve
- // the reloc.
- if (report_err)
- gold_error(_("%s: unsupported reloc %u for IFUNC symbol"),
- object->name().c_str(), r_type);
- return false;
- }
- // Return TRUE iff INSN is one we expect on a _LO variety toc/got
- // reloc.
- static bool
- ok_lo_toc_insn(uint32_t insn, unsigned int r_type)
- {
- return ((insn & (0x3f << 26)) == 12u << 26 /* addic */
- || (insn & (0x3f << 26)) == 14u << 26 /* addi */
- || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
- || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
- || (insn & (0x3f << 26)) == 36u << 26 /* stw */
- || (insn & (0x3f << 26)) == 38u << 26 /* stb */
- || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
- || (insn & (0x3f << 26)) == 42u << 26 /* lha */
- || (insn & (0x3f << 26)) == 44u << 26 /* sth */
- || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
- || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
- || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
- || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
- || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
- || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
- || (insn & (0x3f << 26)) == 56u << 26 /* lq,lfq */
- || ((insn & (0x3f << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */
- /* Exclude lfqu by testing reloc. If relocs are ever
- defined for the reduced D field in psq_lu then those
- will need testing too. */
- && r_type != elfcpp::R_PPC64_TOC16_LO
- && r_type != elfcpp::R_POWERPC_GOT16_LO)
- || ((insn & (0x3f << 26)) == 58u << 26 /* ld,lwa */
- && (insn & 1) == 0)
- || (insn & (0x3f << 26)) == 60u << 26 /* stfq */
- || ((insn & (0x3f << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */
- /* Exclude stfqu. psq_stu as above for psq_lu. */
- && r_type != elfcpp::R_PPC64_TOC16_LO
- && r_type != elfcpp::R_POWERPC_GOT16_LO)
- || ((insn & (0x3f << 26)) == 62u << 26 /* std,stq */
- && (insn & 1) == 0));
- }
- // Scan a relocation for a local symbol.
- template<int size, bool big_endian>
- inline void
- Target_powerpc<size, big_endian>::Scan::local(
- Symbol_table* symtab,
- Layout* layout,
- Target_powerpc<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const elfcpp::Rela<size, big_endian>& reloc,
- unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym,
- bool is_discarded)
- {
- Powerpc_relobj<size, big_endian>* ppc_object
- = static_cast<Powerpc_relobj<size, big_endian>*>(object);
- this->maybe_skip_tls_get_addr_call(target, r_type, NULL);
- if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
- || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
- {
- this->expect_tls_get_addr_call();
- tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
- if (tls_type != tls::TLSOPT_NONE)
- this->skip_next_tls_get_addr_call();
- }
- else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
- || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
- {
- this->expect_tls_get_addr_call();
- tls::Tls_optimization tls_type = target->optimize_tls_ld();
- if (tls_type != tls::TLSOPT_NONE)
- this->skip_next_tls_get_addr_call();
- }
- if (is_discarded)
- {
- if (size == 64
- && data_shndx == ppc_object->opd_shndx()
- && r_type == elfcpp::R_PPC64_ADDR64)
- ppc_object->set_opd_discard(reloc.get_r_offset());
- return;
- }
- // A local STT_GNU_IFUNC symbol may require a PLT entry.
- bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
- if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
- r_type, r_sym, reloc.get_r_addend());
- target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
- }
- switch (r_type)
- {
- case elfcpp::R_POWERPC_NONE:
- case elfcpp::R_POWERPC_GNU_VTINHERIT:
- case elfcpp::R_POWERPC_GNU_VTENTRY:
- case elfcpp::R_POWERPC_TLS:
- case elfcpp::R_PPC64_ENTRY:
- case elfcpp::R_POWERPC_PLTSEQ:
- case elfcpp::R_POWERPC_PLTCALL:
- case elfcpp::R_PPC64_PLTSEQ_NOTOC:
- case elfcpp::R_PPC64_PLTCALL_NOTOC:
- case elfcpp::R_PPC64_PCREL_OPT:
- case elfcpp::R_PPC64_ADDR16_HIGHER34:
- case elfcpp::R_PPC64_ADDR16_HIGHERA34:
- case elfcpp::R_PPC64_ADDR16_HIGHEST34:
- case elfcpp::R_PPC64_ADDR16_HIGHESTA34:
- case elfcpp::R_PPC64_REL16_HIGHER34:
- case elfcpp::R_PPC64_REL16_HIGHERA34:
- case elfcpp::R_PPC64_REL16_HIGHEST34:
- case elfcpp::R_PPC64_REL16_HIGHESTA34:
- case elfcpp::R_PPC64_D34:
- case elfcpp::R_PPC64_D34_LO:
- case elfcpp::R_PPC64_D34_HI30:
- case elfcpp::R_PPC64_D34_HA30:
- case elfcpp::R_PPC64_D28:
- case elfcpp::R_PPC64_PCREL34:
- case elfcpp::R_PPC64_PCREL28:
- case elfcpp::R_PPC64_TPREL34:
- case elfcpp::R_PPC64_DTPREL34:
- break;
- case elfcpp::R_PPC64_TOC:
- {
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, GOT_TYPE_SMALL);
- if (parameters->options().output_is_position_independent())
- {
- Address off = reloc.get_r_offset();
- if (size == 64
- && target->abiversion() < 2
- && data_shndx == ppc_object->opd_shndx()
- && ppc_object->get_opd_discard(off - 8))
- break;
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- Address got_off = got->g_o_t();
- rela_dyn->add_output_section_relative(got->output_section(),
- elfcpp::R_POWERPC_RELATIVE,
- output_section,
- object, data_shndx, off,
- got_off);
- }
- }
- break;
- case elfcpp::R_PPC64_ADDR64:
- case elfcpp::R_PPC64_UADDR64:
- case elfcpp::R_POWERPC_ADDR32:
- case elfcpp::R_POWERPC_UADDR32:
- case elfcpp::R_POWERPC_ADDR24:
- case elfcpp::R_POWERPC_ADDR16:
- case elfcpp::R_POWERPC_ADDR16_LO:
- case elfcpp::R_POWERPC_ADDR16_HI:
- case elfcpp::R_POWERPC_ADDR16_HA:
- case elfcpp::R_POWERPC_UADDR16:
- case elfcpp::R_PPC64_ADDR16_HIGH:
- case elfcpp::R_PPC64_ADDR16_HIGHA:
- case elfcpp::R_PPC64_ADDR16_HIGHER:
- case elfcpp::R_PPC64_ADDR16_HIGHERA:
- case elfcpp::R_PPC64_ADDR16_HIGHEST:
- case elfcpp::R_PPC64_ADDR16_HIGHESTA:
- case elfcpp::R_PPC64_ADDR16_DS:
- case elfcpp::R_PPC64_ADDR16_LO_DS:
- case elfcpp::R_POWERPC_ADDR14:
- case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
- case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
- // If building a shared library (or a position-independent
- // executable), we need to create a dynamic relocation for
- // this location.
- if (parameters->options().output_is_position_independent()
- || (size == 64 && is_ifunc && target->abiversion() < 2))
- {
- Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
- is_ifunc);
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- if ((size == 32 && r_type == elfcpp::R_POWERPC_ADDR32)
- || (size == 64 && r_type == elfcpp::R_PPC64_ADDR64))
- {
- unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
- : elfcpp::R_POWERPC_RELATIVE);
- rela_dyn->add_local_relative(object, r_sym, dynrel,
- output_section, data_shndx,
- reloc.get_r_offset(),
- reloc.get_r_addend(), false);
- }
- else if (lsym.get_st_type() != elfcpp::STT_SECTION)
- {
- check_non_pic(object, r_type);
- rela_dyn->add_local(object, r_sym, r_type, output_section,
- data_shndx, reloc.get_r_offset(),
- reloc.get_r_addend());
- }
- else
- {
- gold_assert(lsym.get_st_value() == 0);
- 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(_("section symbol %u has bad shndx %u"),
- r_sym, shndx);
- else
- rela_dyn->add_local_section(object, shndx, r_type,
- output_section, data_shndx,
- reloc.get_r_offset());
- }
- }
- break;
- case elfcpp::R_PPC64_PLT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34_NOTOC:
- case elfcpp::R_POWERPC_PLT16_LO:
- case elfcpp::R_POWERPC_PLT16_HI:
- case elfcpp::R_POWERPC_PLT16_HA:
- case elfcpp::R_PPC64_PLT16_LO_DS:
- if (!is_ifunc)
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- target->make_local_plt_entry(symtab, layout, object, r_sym);
- }
- break;
- case elfcpp::R_PPC64_REL24_NOTOC:
- if (size == 32)
- break;
- // Fall through.
- case elfcpp::R_PPC64_REL24_P9NOTOC:
- case elfcpp::R_POWERPC_REL24:
- case elfcpp::R_PPC_PLTREL24:
- case elfcpp::R_PPC_LOCAL24PC:
- case elfcpp::R_POWERPC_REL14:
- case elfcpp::R_POWERPC_REL14_BRTAKEN:
- case elfcpp::R_POWERPC_REL14_BRNTAKEN:
- if (!is_ifunc)
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
- r_type, r_sym, reloc.get_r_addend());
- }
- break;
- case elfcpp::R_PPC64_TOCSAVE:
- // R_PPC64_TOCSAVE follows a call instruction to indicate the
- // caller has already saved r2 and thus a plt call stub need not
- // save r2.
- if (size == 64
- && target->mark_pltcall(ppc_object, data_shndx,
- reloc.get_r_offset() - 4, symtab))
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- 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(_("tocsave symbol %u has bad shndx %u"),
- r_sym, shndx);
- else
- target->add_tocsave(ppc_object, shndx,
- lsym.get_st_value() + reloc.get_r_addend());
- }
- break;
- case elfcpp::R_PPC64_REL64:
- case elfcpp::R_POWERPC_REL32:
- case elfcpp::R_POWERPC_REL16:
- case elfcpp::R_POWERPC_REL16_LO:
- case elfcpp::R_POWERPC_REL16_HI:
- case elfcpp::R_POWERPC_REL16_HA:
- case elfcpp::R_POWERPC_REL16DX_HA:
- case elfcpp::R_PPC64_REL16_HIGH:
- case elfcpp::R_PPC64_REL16_HIGHA:
- case elfcpp::R_PPC64_REL16_HIGHER:
- case elfcpp::R_PPC64_REL16_HIGHERA:
- case elfcpp::R_PPC64_REL16_HIGHEST:
- case elfcpp::R_PPC64_REL16_HIGHESTA:
- case elfcpp::R_POWERPC_SECTOFF:
- case elfcpp::R_POWERPC_SECTOFF_LO:
- case elfcpp::R_POWERPC_SECTOFF_HI:
- case elfcpp::R_POWERPC_SECTOFF_HA:
- case elfcpp::R_PPC64_SECTOFF_DS:
- case elfcpp::R_PPC64_SECTOFF_LO_DS:
- case elfcpp::R_POWERPC_TPREL16:
- case elfcpp::R_POWERPC_TPREL16_LO:
- case elfcpp::R_POWERPC_TPREL16_HI:
- case elfcpp::R_POWERPC_TPREL16_HA:
- case elfcpp::R_PPC64_TPREL16_DS:
- case elfcpp::R_PPC64_TPREL16_LO_DS:
- case elfcpp::R_PPC64_TPREL16_HIGH:
- case elfcpp::R_PPC64_TPREL16_HIGHA:
- case elfcpp::R_PPC64_TPREL16_HIGHER:
- case elfcpp::R_PPC64_TPREL16_HIGHERA:
- case elfcpp::R_PPC64_TPREL16_HIGHEST:
- case elfcpp::R_PPC64_TPREL16_HIGHESTA:
- case elfcpp::R_POWERPC_DTPREL16:
- case elfcpp::R_POWERPC_DTPREL16_LO:
- case elfcpp::R_POWERPC_DTPREL16_HI:
- case elfcpp::R_POWERPC_DTPREL16_HA:
- case elfcpp::R_PPC64_DTPREL16_DS:
- case elfcpp::R_PPC64_DTPREL16_LO_DS:
- case elfcpp::R_PPC64_DTPREL16_HIGH:
- case elfcpp::R_PPC64_DTPREL16_HIGHA:
- case elfcpp::R_PPC64_DTPREL16_HIGHER:
- case elfcpp::R_PPC64_DTPREL16_HIGHERA:
- case elfcpp::R_PPC64_DTPREL16_HIGHEST:
- case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
- case elfcpp::R_PPC64_TLSGD:
- case elfcpp::R_PPC64_TLSLD:
- case elfcpp::R_PPC64_ADDR64_LOCAL:
- break;
- case elfcpp::R_PPC64_GOT_PCREL34:
- case elfcpp::R_POWERPC_GOT16:
- case elfcpp::R_POWERPC_GOT16_LO:
- case elfcpp::R_POWERPC_GOT16_HI:
- case elfcpp::R_POWERPC_GOT16_HA:
- case elfcpp::R_PPC64_GOT16_DS:
- case elfcpp::R_PPC64_GOT16_LO_DS:
- {
- // The symbol requires a GOT entry.
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT16
- || r_type == elfcpp::R_PPC64_GOT16_DS)
- ? GOT_TYPE_SMALL : GOT_TYPE_STANDARD);
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, got_type);
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- uint64_t addend = size == 32 ? 0 : reloc.get_r_addend();
- if (!parameters->options().output_is_position_independent())
- {
- if (is_ifunc
- && (size == 32 || target->abiversion() >= 2))
- got->add_local_plt(object, r_sym, got_type, addend);
- else
- got->add_local(object, r_sym, got_type, addend);
- }
- else if (!object->local_has_got_offset(r_sym, got_type, addend))
- {
- // If we are generating a shared object or a pie, this
- // symbol's GOT entry will be set by a dynamic relocation.
- unsigned int off;
- off = got->add_constant(0);
- object->set_local_got_offset(r_sym, got_type, off, addend);
- Reloc_section* rela_dyn = target->rela_dyn_section(symtab, layout,
- is_ifunc);
- unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
- : elfcpp::R_POWERPC_RELATIVE);
- rela_dyn->add_local_relative(object, r_sym, dynrel,
- got, off, addend, false);
- }
- }
- break;
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_PPC64_TOC16_HI:
- case elfcpp::R_PPC64_TOC16_HA:
- case elfcpp::R_PPC64_TOC16_DS:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- // We need a GOT section.
- target->got_section(symtab, layout, GOT_TYPE_SMALL);
- break;
- case elfcpp::R_PPC64_GOT_TLSGD_PCREL34:
- case elfcpp::R_POWERPC_GOT_TLSGD16:
- case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
- {
- tls::Tls_optimization tls_type = target->optimize_tls_gd(true);
- if (tls_type == tls::TLSOPT_NONE)
- {
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16)
- ? GOT_TYPE_SMALL_TLSGD : GOT_TYPE_TLSGD);
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, got_type);
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- uint64_t addend = size == 32 ? 0 : reloc.get_r_addend();
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- got->add_local_tls_pair(object, r_sym, got_type,
- rela_dyn, elfcpp::R_POWERPC_DTPMOD,
- addend);
- }
- else if (tls_type == tls::TLSOPT_TO_LE)
- {
- // no GOT relocs needed for Local Exec.
- }
- else
- gold_unreachable();
- }
- break;
- case elfcpp::R_PPC64_GOT_TLSLD_PCREL34:
- case elfcpp::R_POWERPC_GOT_TLSLD16:
- case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
- case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
- case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
- {
- tls::Tls_optimization tls_type = target->optimize_tls_ld();
- if (tls_type == tls::TLSOPT_NONE)
- target->tlsld_got_offset(symtab, layout, object);
- else if (tls_type == tls::TLSOPT_TO_LE)
- {
- // no GOT relocs needed for Local Exec.
- if (parameters->options().emit_relocs())
- {
- Output_section* os = layout->tls_segment()->first_section();
- gold_assert(os != NULL);
- os->set_needs_symtab_index();
- }
- }
- else
- gold_unreachable();
- }
- break;
- case elfcpp::R_PPC64_GOT_DTPREL_PCREL34:
- case elfcpp::R_POWERPC_GOT_DTPREL16:
- case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
- {
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_DTPREL16)
- ? GOT_TYPE_SMALL_DTPREL : GOT_TYPE_DTPREL);
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, got_type);
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- uint64_t addend = size == 32 ? 0 : reloc.get_r_addend();
- got->add_local_tls(object, r_sym, got_type, addend);
- }
- break;
- case elfcpp::R_PPC64_GOT_TPREL_PCREL34:
- case elfcpp::R_POWERPC_GOT_TPREL16:
- case elfcpp::R_POWERPC_GOT_TPREL16_LO:
- case elfcpp::R_POWERPC_GOT_TPREL16_HI:
- case elfcpp::R_POWERPC_GOT_TPREL16_HA:
- {
- tls::Tls_optimization tls_type = target->optimize_tls_ie(true);
- if (tls_type == tls::TLSOPT_NONE)
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- uint64_t addend = size == 32 ? 0 : reloc.get_r_addend();
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16)
- ? GOT_TYPE_SMALL_TPREL : GOT_TYPE_TPREL);
- if (!object->local_has_got_offset(r_sym, got_type, addend))
- {
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, got_type);
- unsigned int off = got->add_constant(0);
- object->set_local_got_offset(r_sym, got_type, off, addend);
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- rela_dyn->add_symbolless_local_addend(object, r_sym,
- elfcpp::R_POWERPC_TPREL,
- got, off, addend);
- }
- }
- else if (tls_type == tls::TLSOPT_TO_LE)
- {
- // no GOT relocs needed for Local Exec.
- }
- else
- gold_unreachable();
- }
- break;
- default:
- unsupported_reloc_local(object, r_type);
- break;
- }
- if (size == 64
- && parameters->options().toc_optimize())
- {
- if (data_shndx == ppc_object->toc_shndx())
- {
- bool ok = true;
- if (r_type != elfcpp::R_PPC64_ADDR64
- || (is_ifunc && target->abiversion() < 2))
- ok = false;
- else if (parameters->options().output_is_position_independent())
- {
- if (is_ifunc)
- ok = false;
- else
- {
- unsigned int shndx = lsym.get_st_shndx();
- if (shndx >= elfcpp::SHN_LORESERVE
- && shndx != elfcpp::SHN_XINDEX)
- ok = false;
- }
- }
- if (!ok)
- ppc_object->set_no_toc_opt(reloc.get_r_offset());
- }
- enum {no_check, check_lo, check_ha} insn_check;
- switch (r_type)
- {
- default:
- insn_check = no_check;
- break;
- case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
- case elfcpp::R_POWERPC_GOT_TPREL16_HA:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
- case elfcpp::R_POWERPC_GOT16_HA:
- case elfcpp::R_PPC64_TOC16_HA:
- insn_check = check_ha;
- break;
- case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
- case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
- case elfcpp::R_POWERPC_GOT_TPREL16_LO:
- case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
- case elfcpp::R_POWERPC_GOT16_LO:
- case elfcpp::R_PPC64_GOT16_LO_DS:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- insn_check = check_lo;
- break;
- }
- section_size_type slen;
- const unsigned char* view = NULL;
- if (insn_check != no_check)
- {
- view = ppc_object->section_contents(data_shndx, &slen, false);
- section_size_type off =
- convert_to_section_size_type(reloc.get_r_offset()) & -4;
- if (off < slen)
- {
- uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off);
- if (insn_check == check_lo
- ? !ok_lo_toc_insn(insn, r_type)
- : ((insn & ((0x3f << 26) | 0x1f << 16))
- != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
- {
- ppc_object->set_no_toc_opt();
- gold_warning(_("%s: toc optimization is not supported "
- "for %#08x instruction"),
- ppc_object->name().c_str(), insn);
- }
- }
- }
- switch (r_type)
- {
- default:
- break;
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_PPC64_TOC16_HI:
- case elfcpp::R_PPC64_TOC16_HA:
- case elfcpp::R_PPC64_TOC16_DS:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- unsigned int shndx = lsym.get_st_shndx();
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- bool is_ordinary;
- shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
- if (is_ordinary && shndx == ppc_object->toc_shndx())
- {
- Address dst_off = lsym.get_st_value() + reloc.get_r_addend();
- if (dst_off < ppc_object->section_size(shndx))
- {
- bool ok = false;
- if (r_type == elfcpp::R_PPC64_TOC16_HA)
- ok = true;
- else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS)
- {
- // Need to check that the insn is a ld
- if (!view)
- view = ppc_object->section_contents(data_shndx,
- &slen,
- false);
- section_size_type off =
- (convert_to_section_size_type(reloc.get_r_offset())
- + (big_endian ? -2 : 3));
- if (off < slen
- && (view[off] & (0x3f << 2)) == 58u << 2)
- ok = true;
- }
- if (!ok)
- ppc_object->set_no_toc_opt(dst_off);
- }
- }
- break;
- }
- }
- if (size == 32)
- {
- switch (r_type)
- {
- case elfcpp::R_POWERPC_REL32:
- if (ppc_object->got2_shndx() != 0
- && parameters->options().output_is_position_independent())
- {
- unsigned int shndx = lsym.get_st_shndx();
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- bool is_ordinary;
- shndx = ppc_object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
- if (is_ordinary && shndx == ppc_object->got2_shndx()
- && (ppc_object->section_flags(data_shndx)
- & elfcpp::SHF_EXECINSTR) != 0)
- gold_error(_("%s: unsupported -mbss-plt code"),
- ppc_object->name().c_str());
- }
- break;
- default:
- break;
- }
- }
- switch (r_type)
- {
- case elfcpp::R_POWERPC_GOT_TLSLD16:
- case elfcpp::R_POWERPC_GOT_TLSGD16:
- case elfcpp::R_POWERPC_GOT_TPREL16:
- case elfcpp::R_POWERPC_GOT_DTPREL16:
- case elfcpp::R_POWERPC_GOT16:
- case elfcpp::R_PPC64_GOT16_DS:
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_PPC64_TOC16_DS:
- ppc_object->set_has_small_toc_reloc();
- break;
- default:
- break;
- }
- switch (r_type)
- {
- case elfcpp::R_PPC64_TPREL16_DS:
- case elfcpp::R_PPC64_TPREL16_LO_DS:
- case elfcpp::R_PPC64_TPREL16_HIGH:
- case elfcpp::R_PPC64_TPREL16_HIGHA:
- case elfcpp::R_PPC64_TPREL16_HIGHER:
- case elfcpp::R_PPC64_TPREL16_HIGHERA:
- case elfcpp::R_PPC64_TPREL16_HIGHEST:
- case elfcpp::R_PPC64_TPREL16_HIGHESTA:
- case elfcpp::R_PPC64_TPREL34:
- if (size != 64)
- break;
- // Fall through.
- case elfcpp::R_POWERPC_TPREL16:
- case elfcpp::R_POWERPC_TPREL16_LO:
- case elfcpp::R_POWERPC_TPREL16_HI:
- case elfcpp::R_POWERPC_TPREL16_HA:
- layout->set_has_static_tls();
- break;
- default:
- break;
- }
- switch (r_type)
- {
- case elfcpp::R_POWERPC_TPREL16_HA:
- if (target->tprel_opt())
- {
- section_size_type slen;
- const unsigned char* view = NULL;
- view = ppc_object->section_contents(data_shndx, &slen, false);
- section_size_type off
- = convert_to_section_size_type(reloc.get_r_offset()) & -4;
- if (off < slen)
- {
- uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off);
- if ((insn & ((0x3fu << 26) | 0x1f << 16))
- != ((15u << 26) | ((size == 32 ? 2 : 13) << 16)))
- target->set_no_tprel_opt();
- }
- }
- break;
- case elfcpp::R_PPC64_TPREL16_HIGH:
- case elfcpp::R_PPC64_TPREL16_HIGHA:
- case elfcpp::R_PPC64_TPREL16_HIGHER:
- case elfcpp::R_PPC64_TPREL16_HIGHERA:
- case elfcpp::R_PPC64_TPREL16_HIGHEST:
- case elfcpp::R_PPC64_TPREL16_HIGHESTA:
- if (size != 64)
- break;
- // Fall through.
- case elfcpp::R_POWERPC_TPREL16_HI:
- target->set_no_tprel_opt();
- break;
- default:
- break;
- }
- switch (r_type)
- {
- case elfcpp::R_PPC64_D34:
- case elfcpp::R_PPC64_D34_LO:
- case elfcpp::R_PPC64_D34_HI30:
- case elfcpp::R_PPC64_D34_HA30:
- case elfcpp::R_PPC64_D28:
- case elfcpp::R_PPC64_PCREL34:
- case elfcpp::R_PPC64_PCREL28:
- case elfcpp::R_PPC64_TPREL34:
- case elfcpp::R_PPC64_DTPREL34:
- case elfcpp::R_PPC64_PLT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34_NOTOC:
- case elfcpp::R_PPC64_GOT_PCREL34:
- case elfcpp::R_PPC64_GOT_TLSGD_PCREL34:
- case elfcpp::R_PPC64_GOT_TLSLD_PCREL34:
- case elfcpp::R_PPC64_GOT_DTPREL_PCREL34:
- case elfcpp::R_PPC64_GOT_TPREL_PCREL34:
- target->set_power10_relocs();
- break;
- default:
- break;
- }
- }
- // Report an unsupported relocation against a global symbol.
- template<int size, bool big_endian>
- void
- Target_powerpc<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());
- }
- // Scan a relocation for a global symbol.
- template<int size, bool big_endian>
- inline void
- Target_powerpc<size, big_endian>::Scan::global(
- Symbol_table* symtab,
- Layout* layout,
- Target_powerpc<size, big_endian>* target,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- Output_section* output_section,
- const elfcpp::Rela<size, big_endian>& reloc,
- unsigned int r_type,
- Symbol* gsym)
- {
- Powerpc_relobj<size, big_endian>* ppc_object
- = static_cast<Powerpc_relobj<size, big_endian>*>(object);
- switch (this->maybe_skip_tls_get_addr_call(target, r_type, gsym))
- {
- case Track_tls::SKIP:
- return;
- default:
- break;
- }
- if (target->replace_tls_get_addr(gsym))
- // Change a __tls_get_addr reference to __tls_get_addr_opt
- // so dynamic relocs are emitted against the latter symbol.
- gsym = target->tls_get_addr_opt();
- if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
- || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
- {
- this->expect_tls_get_addr_call();
- bool final = gsym->final_value_is_known();
- tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
- if (tls_type != tls::TLSOPT_NONE)
- this->skip_next_tls_get_addr_call();
- }
- else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
- || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
- {
- this->expect_tls_get_addr_call();
- tls::Tls_optimization tls_type = target->optimize_tls_ld();
- if (tls_type != tls::TLSOPT_NONE)
- this->skip_next_tls_get_addr_call();
- }
- // A STT_GNU_IFUNC symbol may require a PLT entry.
- bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
- bool pushed_ifunc = false;
- if (is_ifunc && this->reloc_needs_plt_for_ifunc(target, object, r_type, true))
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
- r_type, r_sym, reloc.get_r_addend());
- target->make_plt_entry(symtab, layout, gsym);
- pushed_ifunc = true;
- }
- switch (r_type)
- {
- case elfcpp::R_POWERPC_NONE:
- case elfcpp::R_POWERPC_GNU_VTINHERIT:
- case elfcpp::R_POWERPC_GNU_VTENTRY:
- case elfcpp::R_PPC_LOCAL24PC:
- case elfcpp::R_POWERPC_TLS:
- case elfcpp::R_PPC64_ENTRY:
- case elfcpp::R_POWERPC_PLTSEQ:
- case elfcpp::R_POWERPC_PLTCALL:
- case elfcpp::R_PPC64_PLTSEQ_NOTOC:
- case elfcpp::R_PPC64_PLTCALL_NOTOC:
- case elfcpp::R_PPC64_PCREL_OPT:
- case elfcpp::R_PPC64_ADDR16_HIGHER34:
- case elfcpp::R_PPC64_ADDR16_HIGHERA34:
- case elfcpp::R_PPC64_ADDR16_HIGHEST34:
- case elfcpp::R_PPC64_ADDR16_HIGHESTA34:
- case elfcpp::R_PPC64_REL16_HIGHER34:
- case elfcpp::R_PPC64_REL16_HIGHERA34:
- case elfcpp::R_PPC64_REL16_HIGHEST34:
- case elfcpp::R_PPC64_REL16_HIGHESTA34:
- case elfcpp::R_PPC64_D34:
- case elfcpp::R_PPC64_D34_LO:
- case elfcpp::R_PPC64_D34_HI30:
- case elfcpp::R_PPC64_D34_HA30:
- case elfcpp::R_PPC64_D28:
- case elfcpp::R_PPC64_PCREL34:
- case elfcpp::R_PPC64_PCREL28:
- case elfcpp::R_PPC64_TPREL34:
- case elfcpp::R_PPC64_DTPREL34:
- break;
- case elfcpp::R_PPC64_TOC:
- {
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, GOT_TYPE_SMALL);
- if (parameters->options().output_is_position_independent())
- {
- Address off = reloc.get_r_offset();
- if (size == 64
- && data_shndx == ppc_object->opd_shndx()
- && ppc_object->get_opd_discard(off - 8))
- break;
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- Address got_off = got->g_o_t();
- rela_dyn->add_output_section_relative(got->output_section(),
- elfcpp::R_POWERPC_RELATIVE,
- output_section,
- object, data_shndx, off,
- got_off);
- }
- }
- break;
- case elfcpp::R_PPC64_ADDR64:
- if (size == 64
- && target->abiversion() < 2
- && data_shndx == ppc_object->opd_shndx()
- && (gsym->is_defined_in_discarded_section()
- || gsym->object() != object))
- {
- ppc_object->set_opd_discard(reloc.get_r_offset());
- break;
- }
- // Fall through.
- case elfcpp::R_PPC64_UADDR64:
- case elfcpp::R_POWERPC_ADDR32:
- case elfcpp::R_POWERPC_UADDR32:
- case elfcpp::R_POWERPC_ADDR24:
- case elfcpp::R_POWERPC_ADDR16:
- case elfcpp::R_POWERPC_ADDR16_LO:
- case elfcpp::R_POWERPC_ADDR16_HI:
- case elfcpp::R_POWERPC_ADDR16_HA:
- case elfcpp::R_POWERPC_UADDR16:
- case elfcpp::R_PPC64_ADDR16_HIGH:
- case elfcpp::R_PPC64_ADDR16_HIGHA:
- case elfcpp::R_PPC64_ADDR16_HIGHER:
- case elfcpp::R_PPC64_ADDR16_HIGHERA:
- case elfcpp::R_PPC64_ADDR16_HIGHEST:
- case elfcpp::R_PPC64_ADDR16_HIGHESTA:
- case elfcpp::R_PPC64_ADDR16_DS:
- case elfcpp::R_PPC64_ADDR16_LO_DS:
- case elfcpp::R_POWERPC_ADDR14:
- case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
- case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
- {
- // Make a PLT entry if necessary.
- if (gsym->needs_plt_entry())
- {
- // 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 call stub.
- bool need_ifunc_plt = false;
- if ((size == 32 || target->abiversion() >= 2)
- && gsym->is_from_dynobj()
- && !parameters->options().output_is_position_independent())
- {
- gsym->set_needs_dynsym_value();
- need_ifunc_plt = true;
- }
- if (!is_ifunc || (!pushed_ifunc && need_ifunc_plt))
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- target->push_branch(ppc_object, data_shndx,
- reloc.get_r_offset(), r_type, r_sym,
- reloc.get_r_addend());
- target->make_plt_entry(symtab, layout, gsym);
- }
- }
- // Make a dynamic relocation if necessary.
- if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target))
- || (size == 64 && is_ifunc && target->abiversion() < 2))
- {
- if (!parameters->options().output_is_position_independent()
- && gsym->may_need_copy_reloc())
- {
- target->copy_reloc(symtab, layout, object,
- data_shndx, output_section, gsym, reloc);
- }
- else if ((((size == 32
- && r_type == elfcpp::R_POWERPC_ADDR32)
- || (size == 64
- && r_type == elfcpp::R_PPC64_ADDR64
- && target->abiversion() >= 2))
- && gsym->can_use_relative_reloc(false)
- && !(gsym->visibility() == elfcpp::STV_PROTECTED
- && parameters->options().shared()))
- || (size == 64
- && r_type == elfcpp::R_PPC64_ADDR64
- && target->abiversion() < 2
- && (gsym->can_use_relative_reloc(false)
- || data_shndx == ppc_object->opd_shndx())))
- {
- Reloc_section* rela_dyn
- = target->rela_dyn_section(symtab, layout, is_ifunc);
- unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
- : elfcpp::R_POWERPC_RELATIVE);
- rela_dyn->add_symbolless_global_addend(
- gsym, dynrel, output_section, object, data_shndx,
- reloc.get_r_offset(), reloc.get_r_addend());
- }
- else
- {
- Reloc_section* rela_dyn
- = target->rela_dyn_section(symtab, layout, is_ifunc);
- check_non_pic(object, r_type);
- rela_dyn->add_global(gsym, r_type, output_section,
- object, data_shndx,
- reloc.get_r_offset(),
- reloc.get_r_addend());
- if (size == 64
- && parameters->options().toc_optimize()
- && data_shndx == ppc_object->toc_shndx())
- ppc_object->set_no_toc_opt(reloc.get_r_offset());
- }
- }
- }
- break;
- case elfcpp::R_PPC64_PLT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34_NOTOC:
- case elfcpp::R_POWERPC_PLT16_LO:
- case elfcpp::R_POWERPC_PLT16_HI:
- case elfcpp::R_POWERPC_PLT16_HA:
- case elfcpp::R_PPC64_PLT16_LO_DS:
- if (!pushed_ifunc)
- {
- if (!parameters->doing_static_link())
- target->make_plt_entry(symtab, layout, gsym);
- else
- target->make_local_plt_entry(symtab, layout, gsym);
- }
- break;
- case elfcpp::R_PPC64_REL24_NOTOC:
- if (size == 32)
- break;
- // Fall through.
- case elfcpp::R_PPC64_REL24_P9NOTOC:
- case elfcpp::R_PPC_PLTREL24:
- case elfcpp::R_POWERPC_REL24:
- if (!is_ifunc)
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
- r_type, r_sym, reloc.get_r_addend());
- if (gsym->needs_plt_entry()
- || (!gsym->final_value_is_known()
- && (gsym->is_undefined()
- || gsym->is_from_dynobj()
- || gsym->is_preemptible())))
- target->make_plt_entry(symtab, layout, gsym);
- }
- // Fall through.
- case elfcpp::R_PPC64_REL64:
- case elfcpp::R_POWERPC_REL32:
- // Make a dynamic relocation if necessary.
- if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type, target)))
- {
- if (!parameters->options().output_is_position_independent()
- && gsym->may_need_copy_reloc())
- {
- target->copy_reloc(symtab, layout, object,
- data_shndx, output_section, gsym,
- reloc);
- }
- else
- {
- Reloc_section* rela_dyn
- = target->rela_dyn_section(symtab, layout, is_ifunc);
- check_non_pic(object, r_type);
- rela_dyn->add_global(gsym, r_type, output_section, object,
- data_shndx, reloc.get_r_offset(),
- reloc.get_r_addend());
- }
- }
- break;
- case elfcpp::R_POWERPC_REL14:
- case elfcpp::R_POWERPC_REL14_BRTAKEN:
- case elfcpp::R_POWERPC_REL14_BRNTAKEN:
- if (!is_ifunc)
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- target->push_branch(ppc_object, data_shndx, reloc.get_r_offset(),
- r_type, r_sym, reloc.get_r_addend());
- }
- break;
- case elfcpp::R_PPC64_TOCSAVE:
- // R_PPC64_TOCSAVE follows a call instruction to indicate the
- // caller has already saved r2 and thus a plt call stub need not
- // save r2.
- if (size == 64
- && target->mark_pltcall(ppc_object, data_shndx,
- reloc.get_r_offset() - 4, symtab))
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- bool is_ordinary;
- unsigned int shndx = gsym->shndx(&is_ordinary);
- if (!is_ordinary)
- object->error(_("tocsave symbol %u has bad shndx %u"),
- r_sym, shndx);
- else
- {
- Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym);
- target->add_tocsave(ppc_object, shndx,
- sym->value() + reloc.get_r_addend());
- }
- }
- break;
- case elfcpp::R_POWERPC_REL16:
- case elfcpp::R_POWERPC_REL16_LO:
- case elfcpp::R_POWERPC_REL16_HI:
- case elfcpp::R_POWERPC_REL16_HA:
- case elfcpp::R_POWERPC_REL16DX_HA:
- case elfcpp::R_PPC64_REL16_HIGH:
- case elfcpp::R_PPC64_REL16_HIGHA:
- case elfcpp::R_PPC64_REL16_HIGHER:
- case elfcpp::R_PPC64_REL16_HIGHERA:
- case elfcpp::R_PPC64_REL16_HIGHEST:
- case elfcpp::R_PPC64_REL16_HIGHESTA:
- case elfcpp::R_POWERPC_SECTOFF:
- case elfcpp::R_POWERPC_SECTOFF_LO:
- case elfcpp::R_POWERPC_SECTOFF_HI:
- case elfcpp::R_POWERPC_SECTOFF_HA:
- case elfcpp::R_PPC64_SECTOFF_DS:
- case elfcpp::R_PPC64_SECTOFF_LO_DS:
- case elfcpp::R_POWERPC_TPREL16:
- case elfcpp::R_POWERPC_TPREL16_LO:
- case elfcpp::R_POWERPC_TPREL16_HI:
- case elfcpp::R_POWERPC_TPREL16_HA:
- case elfcpp::R_PPC64_TPREL16_DS:
- case elfcpp::R_PPC64_TPREL16_LO_DS:
- case elfcpp::R_PPC64_TPREL16_HIGH:
- case elfcpp::R_PPC64_TPREL16_HIGHA:
- case elfcpp::R_PPC64_TPREL16_HIGHER:
- case elfcpp::R_PPC64_TPREL16_HIGHERA:
- case elfcpp::R_PPC64_TPREL16_HIGHEST:
- case elfcpp::R_PPC64_TPREL16_HIGHESTA:
- case elfcpp::R_POWERPC_DTPREL16:
- case elfcpp::R_POWERPC_DTPREL16_LO:
- case elfcpp::R_POWERPC_DTPREL16_HI:
- case elfcpp::R_POWERPC_DTPREL16_HA:
- case elfcpp::R_PPC64_DTPREL16_DS:
- case elfcpp::R_PPC64_DTPREL16_LO_DS:
- case elfcpp::R_PPC64_DTPREL16_HIGH:
- case elfcpp::R_PPC64_DTPREL16_HIGHA:
- case elfcpp::R_PPC64_DTPREL16_HIGHER:
- case elfcpp::R_PPC64_DTPREL16_HIGHERA:
- case elfcpp::R_PPC64_DTPREL16_HIGHEST:
- case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
- case elfcpp::R_PPC64_TLSGD:
- case elfcpp::R_PPC64_TLSLD:
- case elfcpp::R_PPC64_ADDR64_LOCAL:
- break;
- case elfcpp::R_PPC64_GOT_PCREL34:
- case elfcpp::R_POWERPC_GOT16:
- case elfcpp::R_POWERPC_GOT16_LO:
- case elfcpp::R_POWERPC_GOT16_HI:
- case elfcpp::R_POWERPC_GOT16_HA:
- case elfcpp::R_PPC64_GOT16_DS:
- case elfcpp::R_PPC64_GOT16_LO_DS:
- {
- // The symbol requires a GOT entry.
- Output_data_got_powerpc<size, big_endian>* got;
- uint64_t addend = size == 32 ? 0 : reloc.get_r_addend();
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT16
- || r_type == elfcpp::R_PPC64_GOT16_DS)
- ? GOT_TYPE_SMALL : GOT_TYPE_STANDARD);
- got = target->got_section(symtab, layout, got_type);
- if (gsym->final_value_is_known())
- {
- if (is_ifunc
- && (size == 32 || target->abiversion() >= 2))
- got->add_global_plt(gsym, got_type, addend);
- else
- got->add_global(gsym, got_type, addend);
- }
- else if (!gsym->has_got_offset(got_type, addend))
- {
- // If we are generating a shared object or a pie, this
- // symbol's GOT entry will be set by a dynamic relocation.
- unsigned int off = got->add_constant(0);
- gsym->set_got_offset(got_type, off, addend);
- Reloc_section* rela_dyn
- = target->rela_dyn_section(symtab, layout, is_ifunc);
- if (gsym->can_use_relative_reloc(false)
- && !((size == 32
- || target->abiversion() >= 2)
- && gsym->visibility() == elfcpp::STV_PROTECTED
- && parameters->options().shared()))
- {
- unsigned int dynrel = (is_ifunc ? elfcpp::R_POWERPC_IRELATIVE
- : elfcpp::R_POWERPC_RELATIVE);
- rela_dyn->add_global_relative(gsym, dynrel, got, off,
- addend, false);
- }
- else
- {
- unsigned int dynrel = elfcpp::R_POWERPC_GLOB_DAT;
- rela_dyn->add_global(gsym, dynrel, got, off, addend);
- }
- }
- }
- break;
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_PPC64_TOC16_HI:
- case elfcpp::R_PPC64_TOC16_HA:
- case elfcpp::R_PPC64_TOC16_DS:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- // We need a GOT section.
- target->got_section(symtab, layout, GOT_TYPE_SMALL);
- break;
- case elfcpp::R_PPC64_GOT_TLSGD_PCREL34:
- case elfcpp::R_POWERPC_GOT_TLSGD16:
- case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
- {
- bool final = gsym->final_value_is_known();
- tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
- if (tls_type == tls::TLSOPT_NONE)
- {
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16)
- ? GOT_TYPE_SMALL_TLSGD : GOT_TYPE_TLSGD);
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, got_type);
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- uint64_t addend = size == 32 ? 0 : reloc.get_r_addend();
- got->add_global_pair_with_rel(gsym, got_type, rela_dyn,
- elfcpp::R_POWERPC_DTPMOD,
- elfcpp::R_POWERPC_DTPREL,
- addend);
- }
- else if (tls_type == tls::TLSOPT_TO_IE)
- {
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16)
- ? GOT_TYPE_SMALL_TPREL : GOT_TYPE_TPREL);
- if (!gsym->has_got_offset(got_type))
- {
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, got_type);
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- uint64_t addend = size == 32 ? 0 : reloc.get_r_addend();
- if (gsym->is_undefined()
- || gsym->is_from_dynobj())
- {
- got->add_global_with_rel(gsym, got_type, rela_dyn,
- elfcpp::R_POWERPC_TPREL, addend);
- }
- else
- {
- unsigned int off = got->add_constant(0);
- gsym->set_got_offset(got_type, off);
- unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
- rela_dyn->add_symbolless_global_addend(gsym, dynrel,
- got, off, addend);
- }
- }
- }
- else if (tls_type == tls::TLSOPT_TO_LE)
- {
- // no GOT relocs needed for Local Exec.
- }
- else
- gold_unreachable();
- }
- break;
- case elfcpp::R_PPC64_GOT_TLSLD_PCREL34:
- case elfcpp::R_POWERPC_GOT_TLSLD16:
- case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
- case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
- case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
- {
- tls::Tls_optimization tls_type = target->optimize_tls_ld();
- if (tls_type == tls::TLSOPT_NONE)
- target->tlsld_got_offset(symtab, layout, object);
- else if (tls_type == tls::TLSOPT_TO_LE)
- {
- // no GOT relocs needed for Local Exec.
- if (parameters->options().emit_relocs())
- {
- Output_section* os = layout->tls_segment()->first_section();
- gold_assert(os != NULL);
- os->set_needs_symtab_index();
- }
- }
- else
- gold_unreachable();
- }
- break;
- case elfcpp::R_PPC64_GOT_DTPREL_PCREL34:
- case elfcpp::R_POWERPC_GOT_DTPREL16:
- case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
- {
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_DTPREL16)
- ? GOT_TYPE_SMALL_DTPREL : GOT_TYPE_DTPREL);
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, got_type);
- uint64_t addend = size == 32 ? 0 : reloc.get_r_addend();
- if (!gsym->final_value_is_known()
- && (gsym->is_from_dynobj()
- || gsym->is_undefined()
- || gsym->is_preemptible()))
- got->add_global_with_rel(gsym, got_type,
- target->rela_dyn_section(layout),
- elfcpp::R_POWERPC_DTPREL, addend);
- else
- got->add_global_tls(gsym, got_type, addend);
- }
- break;
- case elfcpp::R_PPC64_GOT_TPREL_PCREL34:
- case elfcpp::R_POWERPC_GOT_TPREL16:
- case elfcpp::R_POWERPC_GOT_TPREL16_LO:
- case elfcpp::R_POWERPC_GOT_TPREL16_HI:
- case elfcpp::R_POWERPC_GOT_TPREL16_HA:
- {
- bool final = gsym->final_value_is_known();
- tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
- if (tls_type == tls::TLSOPT_NONE)
- {
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16)
- ? GOT_TYPE_SMALL_TPREL : GOT_TYPE_TPREL);
- if (!gsym->has_got_offset(got_type))
- {
- Output_data_got_powerpc<size, big_endian>* got
- = target->got_section(symtab, layout, got_type);
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- uint64_t addend = size == 32 ? 0 : reloc.get_r_addend();
- if (gsym->is_undefined()
- || gsym->is_from_dynobj())
- {
- got->add_global_with_rel(gsym, got_type, rela_dyn,
- elfcpp::R_POWERPC_TPREL, addend);
- }
- else
- {
- unsigned int off = got->add_constant(0);
- gsym->set_got_offset(got_type, off);
- unsigned int dynrel = elfcpp::R_POWERPC_TPREL;
- rela_dyn->add_symbolless_global_addend(gsym, dynrel,
- got, off, addend);
- }
- }
- }
- else if (tls_type == tls::TLSOPT_TO_LE)
- {
- // no GOT relocs needed for Local Exec.
- }
- else
- gold_unreachable();
- }
- break;
- default:
- unsupported_reloc_global(object, r_type, gsym);
- break;
- }
- if (size == 64
- && parameters->options().toc_optimize())
- {
- if (data_shndx == ppc_object->toc_shndx())
- {
- bool ok = true;
- if (r_type != elfcpp::R_PPC64_ADDR64
- || (is_ifunc && target->abiversion() < 2))
- ok = false;
- else if (parameters->options().output_is_position_independent()
- && (is_ifunc || gsym->is_absolute() || gsym->is_undefined()))
- ok = false;
- if (!ok)
- ppc_object->set_no_toc_opt(reloc.get_r_offset());
- }
- enum {no_check, check_lo, check_ha} insn_check;
- switch (r_type)
- {
- default:
- insn_check = no_check;
- break;
- case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
- case elfcpp::R_POWERPC_GOT_TPREL16_HA:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
- case elfcpp::R_POWERPC_GOT16_HA:
- case elfcpp::R_PPC64_TOC16_HA:
- insn_check = check_ha;
- break;
- case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
- case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
- case elfcpp::R_POWERPC_GOT_TPREL16_LO:
- case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
- case elfcpp::R_POWERPC_GOT16_LO:
- case elfcpp::R_PPC64_GOT16_LO_DS:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- insn_check = check_lo;
- break;
- }
- section_size_type slen;
- const unsigned char* view = NULL;
- if (insn_check != no_check)
- {
- view = ppc_object->section_contents(data_shndx, &slen, false);
- section_size_type off =
- convert_to_section_size_type(reloc.get_r_offset()) & -4;
- if (off < slen)
- {
- uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off);
- if (insn_check == check_lo
- ? !ok_lo_toc_insn(insn, r_type)
- : ((insn & ((0x3f << 26) | 0x1f << 16))
- != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */))
- {
- ppc_object->set_no_toc_opt();
- gold_warning(_("%s: toc optimization is not supported "
- "for %#08x instruction"),
- ppc_object->name().c_str(), insn);
- }
- }
- }
- switch (r_type)
- {
- default:
- break;
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_PPC64_TOC16_HI:
- case elfcpp::R_PPC64_TOC16_HA:
- case elfcpp::R_PPC64_TOC16_DS:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- if (gsym->source() == Symbol::FROM_OBJECT
- && !gsym->object()->is_dynamic())
- {
- Powerpc_relobj<size, big_endian>* sym_object
- = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
- bool is_ordinary;
- unsigned int shndx = gsym->shndx(&is_ordinary);
- if (shndx == sym_object->toc_shndx())
- {
- Sized_symbol<size>* sym = symtab->get_sized_symbol<size>(gsym);
- Address dst_off = sym->value() + reloc.get_r_addend();
- if (dst_off < sym_object->section_size(shndx))
- {
- bool ok = false;
- if (r_type == elfcpp::R_PPC64_TOC16_HA)
- ok = true;
- else if (r_type == elfcpp::R_PPC64_TOC16_LO_DS)
- {
- // Need to check that the insn is a ld
- if (!view)
- view = ppc_object->section_contents(data_shndx,
- &slen,
- false);
- section_size_type off =
- (convert_to_section_size_type(reloc.get_r_offset())
- + (big_endian ? -2 : 3));
- if (off < slen
- && (view[off] & (0x3f << 2)) == (58u << 2))
- ok = true;
- }
- if (!ok)
- sym_object->set_no_toc_opt(dst_off);
- }
- }
- }
- break;
- }
- }
- if (size == 32)
- {
- switch (r_type)
- {
- case elfcpp::R_PPC_LOCAL24PC:
- if (strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
- gold_error(_("%s: unsupported -mbss-plt code"),
- ppc_object->name().c_str());
- break;
- default:
- break;
- }
- }
- switch (r_type)
- {
- case elfcpp::R_POWERPC_GOT_TLSLD16:
- case elfcpp::R_POWERPC_GOT_TLSGD16:
- case elfcpp::R_POWERPC_GOT_TPREL16:
- case elfcpp::R_POWERPC_GOT_DTPREL16:
- case elfcpp::R_POWERPC_GOT16:
- case elfcpp::R_PPC64_GOT16_DS:
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_PPC64_TOC16_DS:
- ppc_object->set_has_small_toc_reloc();
- break;
- default:
- break;
- }
- switch (r_type)
- {
- case elfcpp::R_PPC64_TPREL16_DS:
- case elfcpp::R_PPC64_TPREL16_LO_DS:
- case elfcpp::R_PPC64_TPREL16_HIGH:
- case elfcpp::R_PPC64_TPREL16_HIGHA:
- case elfcpp::R_PPC64_TPREL16_HIGHER:
- case elfcpp::R_PPC64_TPREL16_HIGHERA:
- case elfcpp::R_PPC64_TPREL16_HIGHEST:
- case elfcpp::R_PPC64_TPREL16_HIGHESTA:
- case elfcpp::R_PPC64_TPREL34:
- if (size != 64)
- break;
- // Fall through.
- case elfcpp::R_POWERPC_TPREL16:
- case elfcpp::R_POWERPC_TPREL16_LO:
- case elfcpp::R_POWERPC_TPREL16_HI:
- case elfcpp::R_POWERPC_TPREL16_HA:
- layout->set_has_static_tls();
- break;
- default:
- break;
- }
- switch (r_type)
- {
- case elfcpp::R_POWERPC_TPREL16_HA:
- if (target->tprel_opt())
- {
- section_size_type slen;
- const unsigned char* view = NULL;
- view = ppc_object->section_contents(data_shndx, &slen, false);
- section_size_type off
- = convert_to_section_size_type(reloc.get_r_offset()) & -4;
- if (off < slen)
- {
- uint32_t insn = elfcpp::Swap<32, big_endian>::readval(view + off);
- if ((insn & ((0x3fu << 26) | 0x1f << 16))
- != ((15u << 26) | ((size == 32 ? 2 : 13) << 16)))
- target->set_no_tprel_opt();
- }
- }
- break;
- case elfcpp::R_PPC64_TPREL16_HIGH:
- case elfcpp::R_PPC64_TPREL16_HIGHA:
- case elfcpp::R_PPC64_TPREL16_HIGHER:
- case elfcpp::R_PPC64_TPREL16_HIGHERA:
- case elfcpp::R_PPC64_TPREL16_HIGHEST:
- case elfcpp::R_PPC64_TPREL16_HIGHESTA:
- if (size != 64)
- break;
- // Fall through.
- case elfcpp::R_POWERPC_TPREL16_HI:
- target->set_no_tprel_opt();
- break;
- default:
- break;
- }
- switch (r_type)
- {
- case elfcpp::R_PPC64_D34:
- case elfcpp::R_PPC64_D34_LO:
- case elfcpp::R_PPC64_D34_HI30:
- case elfcpp::R_PPC64_D34_HA30:
- case elfcpp::R_PPC64_D28:
- case elfcpp::R_PPC64_PCREL34:
- case elfcpp::R_PPC64_PCREL28:
- case elfcpp::R_PPC64_TPREL34:
- case elfcpp::R_PPC64_DTPREL34:
- case elfcpp::R_PPC64_PLT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34_NOTOC:
- case elfcpp::R_PPC64_GOT_PCREL34:
- case elfcpp::R_PPC64_GOT_TLSGD_PCREL34:
- case elfcpp::R_PPC64_GOT_TLSLD_PCREL34:
- case elfcpp::R_PPC64_GOT_DTPREL_PCREL34:
- case elfcpp::R_PPC64_GOT_TPREL_PCREL34:
- target->set_power10_relocs();
- break;
- default:
- break;
- }
- }
- // Process relocations for gc.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::gc_process_relocs(
- Symbol_table* symtab,
- Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
- unsigned int data_shndx,
- unsigned int,
- 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_powerpc<size, big_endian> Powerpc;
- typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- Powerpc_relobj<size, big_endian>* ppc_object
- = static_cast<Powerpc_relobj<size, big_endian>*>(object);
- if (size == 64)
- ppc_object->set_opd_valid();
- if (size == 64 && data_shndx == ppc_object->opd_shndx())
- {
- typename Powerpc_relobj<size, big_endian>::Access_from::iterator p;
- for (p = ppc_object->access_from_map()->begin();
- p != ppc_object->access_from_map()->end();
- ++p)
- {
- Address dst_off = p->first;
- unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
- typename Powerpc_relobj<size, big_endian>::Section_refs::iterator s;
- for (s = p->second.begin(); s != p->second.end(); ++s)
- {
- Relobj* src_obj = s->first;
- unsigned int src_indx = s->second;
- symtab->gc()->add_reference(src_obj, src_indx,
- ppc_object, dst_indx);
- }
- p->second.clear();
- }
- ppc_object->access_from_map()->clear();
- ppc_object->process_gc_mark(symtab);
- // Don't look at .opd relocs as .opd will reference everything.
- return;
- }
- gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>(
- symtab,
- layout,
- this,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_symbols);
- }
- // Handle target specific gc actions when adding a gc reference from
- // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX
- // and DST_OFF. For powerpc64, this adds a referenc to the code
- // section of a function descriptor.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::do_gc_add_reference(
- Symbol_table* symtab,
- Relobj* src_obj,
- unsigned int src_shndx,
- Relobj* dst_obj,
- unsigned int dst_shndx,
- Address dst_off) const
- {
- if (size != 64 || dst_obj->is_dynamic())
- return;
- Powerpc_relobj<size, big_endian>* ppc_object
- = static_cast<Powerpc_relobj<size, big_endian>*>(dst_obj);
- if (dst_shndx != 0 && dst_shndx == ppc_object->opd_shndx())
- {
- if (ppc_object->opd_valid())
- {
- dst_shndx = ppc_object->get_opd_ent(dst_off);
- symtab->gc()->add_reference(src_obj, src_shndx, dst_obj, dst_shndx);
- }
- else
- {
- // If we haven't run scan_opd_relocs, we must delay
- // processing this function descriptor reference.
- ppc_object->add_reference(src_obj, src_shndx, dst_off);
- }
- }
- }
- // Add any special sections for this symbol to the gc work list.
- // For powerpc64, this adds the code section of a function
- // descriptor.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::do_gc_mark_symbol(
- Symbol_table* symtab,
- Symbol* sym) const
- {
- if (size == 64 && sym->object()->pluginobj() == NULL)
- {
- Powerpc_relobj<size, big_endian>* ppc_object
- = static_cast<Powerpc_relobj<size, big_endian>*>(sym->object());
- bool is_ordinary;
- unsigned int shndx = sym->shndx(&is_ordinary);
- if (is_ordinary && shndx != 0 && shndx == ppc_object->opd_shndx())
- {
- Sized_symbol<size>* gsym = symtab->get_sized_symbol<size>(sym);
- Address dst_off = gsym->value();
- if (ppc_object->opd_valid())
- {
- unsigned int dst_indx = ppc_object->get_opd_ent(dst_off);
- symtab->gc()->worklist().push_back(Section_id(ppc_object,
- dst_indx));
- }
- else
- ppc_object->add_gc_mark(dst_off);
- }
- }
- }
- // For a symbol location in .opd, set LOC to the location of the
- // function entry.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::do_function_location(
- Symbol_location* loc) const
- {
- if (size == 64 && loc->shndx != 0)
- {
- if (loc->object->is_dynamic())
- {
- Powerpc_dynobj<size, big_endian>* ppc_object
- = static_cast<Powerpc_dynobj<size, big_endian>*>(loc->object);
- if (loc->shndx == ppc_object->opd_shndx())
- {
- Address dest_off;
- Address off = loc->offset - ppc_object->opd_address();
- loc->shndx = ppc_object->get_opd_ent(off, &dest_off);
- loc->offset = dest_off;
- }
- }
- else
- {
- const Powerpc_relobj<size, big_endian>* ppc_object
- = static_cast<const Powerpc_relobj<size, big_endian>*>(loc->object);
- if (loc->shndx == ppc_object->opd_shndx())
- {
- Address dest_off;
- loc->shndx = ppc_object->get_opd_ent(loc->offset, &dest_off);
- loc->offset = dest_off;
- }
- }
- }
- }
- // FNOFFSET in section SHNDX in OBJECT is the start of a function
- // compiled with -fsplit-stack. The function calls non-split-stack
- // code. Change the function to ensure it has enough stack space to
- // call some random function.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::do_calls_non_split(
- Relobj* object,
- unsigned int shndx,
- section_offset_type fnoffset,
- section_size_type fnsize,
- const unsigned char* prelocs,
- size_t reloc_count,
- unsigned char* view,
- section_size_type view_size,
- std::string* from,
- std::string* to) const
- {
- // 32-bit not supported.
- if (size == 32)
- {
- // warn
- Target::do_calls_non_split(object, shndx, fnoffset, fnsize,
- prelocs, reloc_count, view, view_size,
- from, to);
- return;
- }
- // The function always starts with
- // ld %r0,-0x7000-64(%r13) # tcbhead_t.__private_ss
- // addis %r12,%r1,-allocate@ha
- // addi %r12,%r12,-allocate@l
- // cmpld %r12,%r0
- // but note that the addis or addi may be replaced with a nop
- unsigned char *entry = view + fnoffset;
- uint32_t insn = elfcpp::Swap<32, big_endian>::readval(entry);
- if ((insn & 0xffff0000) == addis_2_12)
- {
- /* Skip ELFv2 global entry code. */
- entry += 8;
- insn = elfcpp::Swap<32, big_endian>::readval(entry);
- }
- unsigned char *pinsn = entry;
- bool ok = false;
- const uint32_t ld_private_ss = 0xe80d8fc0;
- if (insn == ld_private_ss)
- {
- int32_t allocate = 0;
- while (1)
- {
- pinsn += 4;
- insn = elfcpp::Swap<32, big_endian>::readval(pinsn);
- if ((insn & 0xffff0000) == addis_12_1)
- allocate += (insn & 0xffff) << 16;
- else if ((insn & 0xffff0000) == addi_12_1
- || (insn & 0xffff0000) == addi_12_12)
- allocate += ((insn & 0xffff) ^ 0x8000) - 0x8000;
- else if (insn != nop)
- break;
- }
- if (insn == cmpld_7_12_0 && pinsn == entry + 12)
- {
- int extra = parameters->options().split_stack_adjust_size();
- allocate -= extra;
- if (allocate >= 0 || extra < 0)
- {
- object->error(_("split-stack stack size overflow at "
- "section %u offset %0zx"),
- shndx, static_cast<size_t>(fnoffset));
- return;
- }
- pinsn = entry + 4;
- insn = addis_12_1 | (((allocate + 0x8000) >> 16) & 0xffff);
- if (insn != addis_12_1)
- {
- elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
- pinsn += 4;
- insn = addi_12_12 | (allocate & 0xffff);
- if (insn != addi_12_12)
- {
- elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
- pinsn += 4;
- }
- }
- else
- {
- insn = addi_12_1 | (allocate & 0xffff);
- elfcpp::Swap<32, big_endian>::writeval(pinsn, insn);
- pinsn += 4;
- }
- if (pinsn != entry + 12)
- elfcpp::Swap<32, big_endian>::writeval(pinsn, nop);
- ok = true;
- }
- }
- if (!ok)
- {
- if (!object->has_no_split_stack())
- object->error(_("failed to match split-stack sequence at "
- "section %u offset %0zx"),
- shndx, static_cast<size_t>(fnoffset));
- }
- }
- // Scan relocations for a section.
- template<int size, bool big_endian>
- void
- Target_powerpc<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_powerpc<size, big_endian> Powerpc;
- typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- if (!this->plt_localentry0_init_)
- {
- bool plt_localentry0 = false;
- if (size == 64
- && this->abiversion() >= 2)
- {
- if (parameters->options().user_set_plt_localentry())
- plt_localentry0 = parameters->options().plt_localentry();
- if (plt_localentry0
- && symtab->lookup("GLIBC_2.26", NULL) == NULL)
- gold_warning(_("--plt-localentry is especially dangerous without "
- "ld.so support to detect ABI violations"));
- }
- this->plt_localentry0_ = plt_localentry0;
- this->plt_localentry0_init_ = true;
- }
- if (sh_type == elfcpp::SHT_REL)
- {
- gold_error(_("%s: unsupported REL reloc section"),
- object->name().c_str());
- return;
- }
- gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>(
- symtab,
- layout,
- this,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_symbols);
- if (this->plt_localentry0_ && this->power10_relocs_)
- {
- gold_warning(_("--plt-localentry is incompatible with "
- "power10 pc-relative code"));
- this->plt_localentry0_ = false;
- }
- }
- // Functor class for processing the global symbol table.
- // Removes symbols defined on discarded opd entries.
- template<bool big_endian>
- class Global_symbol_visitor_opd
- {
- public:
- Global_symbol_visitor_opd()
- { }
- void
- operator()(Sized_symbol<64>* sym)
- {
- if (sym->has_symtab_index()
- || sym->source() != Symbol::FROM_OBJECT
- || !sym->in_real_elf())
- return;
- if (sym->object()->is_dynamic())
- return;
- Powerpc_relobj<64, big_endian>* symobj
- = static_cast<Powerpc_relobj<64, big_endian>*>(sym->object());
- if (symobj->opd_shndx() == 0)
- return;
- bool is_ordinary;
- unsigned int shndx = sym->shndx(&is_ordinary);
- if (shndx == symobj->opd_shndx()
- && symobj->get_opd_discard(sym->value()))
- {
- sym->set_undefined();
- sym->set_visibility(elfcpp::STV_DEFAULT);
- sym->set_is_defined_in_discarded_section();
- sym->set_symtab_index(-1U);
- }
- }
- };
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::define_save_restore_funcs(
- Layout* layout,
- Symbol_table* symtab)
- {
- if (size == 64)
- {
- Output_data_save_res<size, big_endian>* savres
- = new Output_data_save_res<size, big_endian>(symtab);
- this->savres_section_ = savres;
- layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
- elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
- savres, ORDER_TEXT, false);
- }
- }
- // Sort linker created .got section first (for the header), then input
- // sections belonging to files using small model code.
- template<bool big_endian>
- class Sort_toc_sections
- {
- const Output_section_data*
- small_got_section() const
- {
- return (static_cast<Target_powerpc<64, big_endian>*>(
- parameters->sized_target<64, big_endian>())
- ->got_section(GOT_TYPE_SMALL));
- }
- int
- rank(const Output_section::Input_section& isec) const
- {
- if (!isec.is_input_section())
- {
- if (isec.output_section_data() == this->small_got_section())
- return 0;
- return 2;
- }
- if (static_cast<const Powerpc_relobj<64, big_endian>*>(isec.relobj())
- ->has_small_toc_reloc())
- return 1;
- return 3;
- }
- public:
- bool
- operator()(const Output_section::Input_section& is1,
- const Output_section::Input_section& is2) const
- {
- return rank(is1) < rank(is2);
- }
- };
- // Finalize the sections.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::do_finalize_sections(
- Layout* layout,
- const Input_objects* input_objects,
- Symbol_table* symtab)
- {
- if (parameters->doing_static_link())
- {
- // At least some versions of glibc elf-init.o have a strong
- // reference to __rela_iplt marker syms. A weak ref would be
- // better..
- if (this->iplt_ != NULL)
- {
- Reloc_section* rel = this->iplt_->rel_plt();
- symtab->define_in_output_data("__rela_iplt_start", NULL,
- Symbol_table::PREDEFINED, rel, 0, 0,
- elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
- elfcpp::STV_HIDDEN, 0, false, true);
- symtab->define_in_output_data("__rela_iplt_end", NULL,
- Symbol_table::PREDEFINED, rel, 0, 0,
- elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
- elfcpp::STV_HIDDEN, 0, true, true);
- }
- else
- {
- symtab->define_as_constant("__rela_iplt_start", NULL,
- Symbol_table::PREDEFINED, 0, 0,
- elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
- elfcpp::STV_HIDDEN, 0, true, false);
- symtab->define_as_constant("__rela_iplt_end", NULL,
- Symbol_table::PREDEFINED, 0, 0,
- elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
- elfcpp::STV_HIDDEN, 0, true, false);
- }
- }
- if (size == 64)
- {
- typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
- symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
- if (!parameters->options().relocatable())
- {
- this->define_save_restore_funcs(layout, symtab);
- // Annoyingly, we need to make these sections now whether or
- // not we need them. If we delay until do_relax then we
- // need to mess with the relaxation machinery checkpointing.
- this->got_section(symtab, layout, GOT_TYPE_STANDARD);
- this->make_brlt_section(layout);
- // FIXME, maybe. Here we could run through all the got
- // entries in the small got section, removing any duplicates
- // found in the big got section and renumbering offsets.
- if (parameters->options().toc_sort())
- {
- Output_section* os = this->got_->output_section();
- if (os != NULL && os->input_sections().size() > 1)
- std::stable_sort(os->input_sections().begin(),
- os->input_sections().end(),
- Sort_toc_sections<big_endian>());
- }
- }
- }
- // Fill in some more dynamic tags.
- Output_data_dynamic* odyn = layout->dynamic_data();
- if (odyn != NULL)
- {
- const Reloc_section* rel_plt = (this->plt_ == NULL
- ? NULL
- : this->plt_->rel_plt());
- layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
- this->rela_dyn_, true, size == 32);
- if (size == 32)
- {
- if (this->got_ != NULL)
- {
- this->got_->finalize_data_size();
- odyn->add_section_plus_offset(elfcpp::DT_PPC_GOT,
- this->got_, this->got_->g_o_t());
- }
- if (this->has_tls_get_addr_opt_)
- odyn->add_constant(elfcpp::DT_PPC_OPT, elfcpp::PPC_OPT_TLS);
- }
- else
- {
- if (this->glink_ != NULL)
- {
- this->glink_->finalize_data_size();
- odyn->add_section_plus_offset(elfcpp::DT_PPC64_GLINK,
- this->glink_,
- (this->glink_->pltresolve_size()
- - 32));
- }
- if (this->has_localentry0_ || this->has_tls_get_addr_opt_)
- odyn->add_constant(elfcpp::DT_PPC64_OPT,
- ((this->has_localentry0_
- ? elfcpp::PPC64_OPT_LOCALENTRY : 0)
- | (this->has_tls_get_addr_opt_
- ? elfcpp::PPC64_OPT_TLS : 0)));
- }
- }
- // Emit any relocs we saved in an attempt to avoid generating COPY
- // relocs.
- if (this->copy_relocs_.any_saved_relocs())
- this->copy_relocs_.emit(this->rela_dyn_section(layout));
- for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
- p != input_objects->relobj_end();
- ++p)
- {
- Powerpc_relobj<size, big_endian>* ppc_relobj
- = static_cast<Powerpc_relobj<size, big_endian>*>(*p);
- if (ppc_relobj->attributes_section_data())
- this->merge_object_attributes(ppc_relobj,
- ppc_relobj->attributes_section_data());
- }
- for (Input_objects::Dynobj_iterator p = input_objects->dynobj_begin();
- p != input_objects->dynobj_end();
- ++p)
- {
- Powerpc_dynobj<size, big_endian>* ppc_dynobj
- = static_cast<Powerpc_dynobj<size, big_endian>*>(*p);
- if (ppc_dynobj->attributes_section_data())
- this->merge_object_attributes(ppc_dynobj,
- ppc_dynobj->attributes_section_data());
- }
- // Create a .gnu.attributes section if we have merged any attributes
- // from inputs.
- if (this->attributes_section_data_ != NULL
- && this->attributes_section_data_->size() != 0)
- {
- 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);
- }
- }
- // Merge object attributes from input file called NAME with those of the
- // output. The input object attributes are in the object pointed by PASD.
- template<int size, bool big_endian>
- void
- Target_powerpc<size, big_endian>::merge_object_attributes(
- const Object* obj,
- const Attributes_section_data* pasd)
- {
- // Return if there is no attributes section data.
- if (pasd == NULL)
- return;
- // Create output object attributes.
- if (this->attributes_section_data_ == NULL)
- this->attributes_section_data_ = new Attributes_section_data(NULL, 0);
- const int vendor = Object_attribute::OBJ_ATTR_GNU;
- const Object_attribute* in_attr = pasd->known_attributes(vendor);
- Object_attribute* out_attr
- = this->attributes_section_data_->known_attributes(vendor);
- const char* name = obj->name().c_str();
- const char* err;
- const char* first;
- const char* second;
- int tag = elfcpp::Tag_GNU_Power_ABI_FP;
- int in_fp = in_attr[tag].int_value() & 0xf;
- int out_fp = out_attr[tag].int_value() & 0xf;
- bool warn_only = obj->is_dynamic();
- if (in_fp != out_fp)
- {
- err = NULL;
- if ((in_fp & 3) == 0)
- ;
- else if ((out_fp & 3) == 0)
- {
- if (!warn_only)
- {
- out_fp |= in_fp & 3;
- out_attr[tag].set_int_value(out_fp);
- out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL);
- this->last_fp_ = name;
- }
- }
- else if ((out_fp & 3) != 2 && (in_fp & 3) == 2)
- {
- err = N_("%s uses hard float, %s uses soft float");
- first = this->last_fp_;
- second = name;
- }
- else if ((out_fp & 3) == 2 && (in_fp & 3) != 2)
- {
- err = N_("%s uses hard float, %s uses soft float");
- first = name;
- second = this->last_fp_;
- }
- else if ((out_fp & 3) == 1 && (in_fp & 3) == 3)
- {
- err = N_("%s uses double-precision hard float, "
- "%s uses single-precision hard float");
- first = this->last_fp_;
- second = name;
- }
- else if ((out_fp & 3) == 3 && (in_fp & 3) == 1)
- {
- err = N_("%s uses double-precision hard float, "
- "%s uses single-precision hard float");
- first = name;
- second = this->last_fp_;
- }
- if (err || (in_fp & 0xc) == 0)
- ;
- else if ((out_fp & 0xc) == 0)
- {
- if (!warn_only)
- {
- out_fp |= in_fp & 0xc;
- out_attr[tag].set_int_value(out_fp);
- out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL);
- this->last_ld_ = name;
- }
- }
- else if ((out_fp & 0xc) != 2 * 4 && (in_fp & 0xc) == 2 * 4)
- {
- err = N_("%s uses 64-bit long double, %s uses 128-bit long double");
- first = name;
- second = this->last_ld_;
- }
- else if ((in_fp & 0xc) != 2 * 4 && (out_fp & 0xc) == 2 * 4)
- {
- err = N_("%s uses 64-bit long double, %s uses 128-bit long double");
- first = this->last_ld_;
- second = name;
- }
- else if ((out_fp & 0xc) == 1 * 4 && (in_fp & 0xc) == 3 * 4)
- {
- err = N_("%s uses IBM long double, %s uses IEEE long double");
- first = this->last_ld_;
- second = name;
- }
- else if ((out_fp & 0xc) == 3 * 4 && (in_fp & 0xc) == 1 * 4)
- {
- err = N_("%s uses IBM long double, %s uses IEEE long double");
- first = name;
- second = this->last_ld_;
- }
- if (err)
- {
- if (parameters->options().warn_mismatch())
- {
- if (warn_only)
- gold_warning(_(err), first, second);
- else
- gold_error(_(err), first, second);
- }
- // Arrange for this attribute to be deleted. It's better to
- // say "don't know" about a file than to wrongly claim compliance.
- if (!warn_only)
- out_attr[tag].set_type(0);
- }
- }
- if (size == 32)
- {
- tag = elfcpp::Tag_GNU_Power_ABI_Vector;
- int in_vec = in_attr[tag].int_value() & 3;
- int out_vec = out_attr[tag].int_value() & 3;
- if (in_vec != out_vec)
- {
- err = NULL;
- if (in_vec == 0)
- ;
- else if (out_vec == 0)
- {
- out_vec = in_vec;
- out_attr[tag].set_int_value(out_vec);
- out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL);
- this->last_vec_ = name;
- }
- // For now, allow generic to transition to AltiVec or SPE
- // without a warning. If GCC marked files with their stack
- // alignment and used don't-care markings for files which are
- // not affected by the vector ABI, we could warn about this
- // case too. */
- else if (in_vec == 1)
- ;
- else if (out_vec == 1)
- {
- out_vec = in_vec;
- out_attr[tag].set_int_value(out_vec);
- out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL);
- this->last_vec_ = name;
- }
- else if (out_vec < in_vec)
- {
- err = N_("%s uses AltiVec vector ABI, %s uses SPE vector ABI");
- first = this->last_vec_;
- second = name;
- }
- else if (out_vec > in_vec)
- {
- err = N_("%s uses AltiVec vector ABI, %s uses SPE vector ABI");
- first = name;
- second = this->last_vec_;
- }
- if (err)
- {
- if (parameters->options().warn_mismatch())
- gold_error(_(err), first, second);
- out_attr[tag].set_type(0);
- }
- }
- tag = elfcpp::Tag_GNU_Power_ABI_Struct_Return;
- int in_struct = in_attr[tag].int_value() & 3;
- int out_struct = out_attr[tag].int_value() & 3;
- if (in_struct != out_struct)
- {
- err = NULL;
- if (in_struct == 0 || in_struct == 3)
- ;
- else if (out_struct == 0)
- {
- out_struct = in_struct;
- out_attr[tag].set_int_value(out_struct);
- out_attr[tag].set_type(Object_attribute::ATTR_TYPE_FLAG_INT_VAL);
- this->last_struct_ = name;
- }
- else if (out_struct < in_struct)
- {
- err = N_("%s uses r3/r4 for small structure returns, "
- "%s uses memory");
- first = this->last_struct_;
- second = name;
- }
- else if (out_struct > in_struct)
- {
- err = N_("%s uses r3/r4 for small structure returns, "
- "%s uses memory");
- first = name;
- second = this->last_struct_;
- }
- if (err)
- {
- if (parameters->options().warn_mismatch())
- gold_error(_(err), first, second);
- out_attr[tag].set_type(0);
- }
- }
- }
- // Merge Tag_compatibility attributes and any common GNU ones.
- this->attributes_section_data_->merge(name, pasd);
- }
- // Emit any saved relocs, and mark toc entries using any of these
- // relocs as not optimizable.
- template<int sh_type, int size, bool big_endian>
- void
- Powerpc_copy_relocs<sh_type, size, big_endian>::emit(
- Output_data_reloc<sh_type, true, size, big_endian>* reloc_section)
- {
- if (size == 64
- && parameters->options().toc_optimize())
- {
- for (typename Copy_relocs<sh_type, size, big_endian>::
- Copy_reloc_entries::iterator p = this->entries_.begin();
- p != this->entries_.end();
- ++p)
- {
- typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry&
- entry = *p;
- // If the symbol is no longer defined in a dynamic object,
- // then we emitted a COPY relocation. If it is still
- // dynamic then we'll need dynamic relocations and thus
- // can't optimize toc entries.
- if (entry.sym_->is_from_dynobj())
- {
- Powerpc_relobj<size, big_endian>* ppc_object
- = static_cast<Powerpc_relobj<size, big_endian>*>(entry.relobj_);
- if (entry.shndx_ == ppc_object->toc_shndx())
- ppc_object->set_no_toc_opt(entry.address_);
- }
- }
- }
- Copy_relocs<sh_type, size, big_endian>::emit(reloc_section);
- }
- // Return the value to use for a branch relocation.
- template<int size, bool big_endian>
- bool
- Target_powerpc<size, big_endian>::symval_for_branch(
- const Symbol_table* symtab,
- const Sized_symbol<size>* gsym,
- Powerpc_relobj<size, big_endian>* object,
- Address *value,
- unsigned int *dest_shndx)
- {
- if (size == 32 || this->abiversion() >= 2)
- gold_unreachable();
- *dest_shndx = 0;
- // If the symbol is defined in an opd section, ie. is a function
- // descriptor, use the function descriptor code entry address
- Powerpc_relobj<size, big_endian>* symobj = object;
- if (gsym != NULL
- && (gsym->source() != Symbol::FROM_OBJECT
- || gsym->object()->is_dynamic()))
- return true;
- if (gsym != NULL)
- symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
- unsigned int shndx = symobj->opd_shndx();
- if (shndx == 0)
- return true;
- Address opd_addr = symobj->get_output_section_offset(shndx);
- if (opd_addr == invalid_address)
- return true;
- opd_addr += symobj->output_section_address(shndx);
- if (*value >= opd_addr && *value < opd_addr + symobj->section_size(shndx))
- {
- Address sec_off;
- *dest_shndx = symobj->get_opd_ent(*value - opd_addr, &sec_off);
- if (symtab->is_section_folded(symobj, *dest_shndx))
- {
- Section_id folded
- = symtab->icf()->get_folded_section(symobj, *dest_shndx);
- symobj = static_cast<Powerpc_relobj<size, big_endian>*>(folded.first);
- *dest_shndx = folded.second;
- }
- Address sec_addr = symobj->get_output_section_offset(*dest_shndx);
- if (sec_addr == invalid_address)
- return false;
- sec_addr += symobj->output_section(*dest_shndx)->address();
- *value = sec_addr + sec_off;
- }
- return true;
- }
- template<int size>
- static bool
- relative_value_is_known(const Sized_symbol<size>* gsym)
- {
- if (gsym->type() == elfcpp::STT_GNU_IFUNC)
- return false;
- if (gsym->is_from_dynobj()
- || gsym->is_undefined()
- || gsym->is_preemptible())
- return false;
- if (gsym->is_absolute())
- return !parameters->options().output_is_position_independent();
- return true;
- }
- template<int size>
- static bool
- relative_value_is_known(const Symbol_value<size>* psymval)
- {
- if (psymval->is_ifunc_symbol())
- return false;
- bool is_ordinary;
- unsigned int shndx = psymval->input_shndx(&is_ordinary);
- return is_ordinary && shndx != elfcpp::SHN_UNDEF;
- }
- // PCREL_OPT in one instance flags to the linker that a pair of insns:
- // pld ra,symbol@got@pcrel
- // load/store rt,0(ra)
- // or
- // pla ra,symbol@pcrel
- // load/store rt,0(ra)
- // may be translated to
- // pload/pstore rt,symbol@pcrel
- // nop.
- // This function returns true if the optimization is possible, placing
- // the prefix insn in *PINSN1 and a NOP in *PINSN2.
- //
- // On entry to this function, the linker has already determined that
- // the pld can be replaced with pla: *PINSN1 is that pla insn,
- // while *PINSN2 is the second instruction.
- inline bool
- xlate_pcrel_opt(uint64_t *pinsn1, uint64_t *pinsn2)
- {
- uint32_t insn2 = *pinsn2 >> 32;
- uint64_t i1new;
- // Check that regs match.
- if (((insn2 >> 16) & 31) != ((*pinsn1 >> 21) & 31))
- return false;
- switch ((insn2 >> 26) & 63)
- {
- default:
- return false;
- case 32: // lwz
- case 34: // lbz
- case 36: // stw
- case 38: // stb
- case 40: // lhz
- case 42: // lha
- case 44: // sth
- case 48: // lfs
- case 50: // lfd
- case 52: // stfs
- case 54: // stfd
- // These are the PMLS cases, where we just need to tack a prefix
- // on the insn. Check that the D field is zero.
- if ((insn2 & 0xffff) != 0)
- return false;
- i1new = ((1ULL << 58) | (2ULL << 56) | (1ULL << 52)
- | (insn2 & ((63ULL << 26) | (31ULL << 21))));
- break;
- case 58: // lwa, ld
- if ((insn2 & 0xfffd) != 0)
- return false;
- i1new = ((1ULL << 58) | (1ULL << 52)
- | (insn2 & 2 ? 41ULL << 26 : 57ULL << 26)
- | (insn2 & (31ULL << 21)));
- break;
- case 57: // lxsd, lxssp
- if ((insn2 & 0xfffc) != 0 || (insn2 & 3) < 2)
- return false;
- i1new = ((1ULL << 58) | (1ULL << 52)
- | ((40ULL | (insn2 & 3)) << 26)
- | (insn2 & (31ULL << 21)));
- break;
- case 61: // stxsd, stxssp, lxv, stxv
- if ((insn2 & 3) == 0)
- return false;
- else if ((insn2 & 3) >= 2)
- {
- if ((insn2 & 0xfffc) != 0)
- return false;
- i1new = ((1ULL << 58) | (1ULL << 52)
- | ((44ULL | (insn2 & 3)) << 26)
- | (insn2 & (31ULL << 21)));
- }
- else
- {
- if ((insn2 & 0xfff0) != 0)
- return false;
- i1new = ((1ULL << 58) | (1ULL << 52)
- | ((50ULL | (insn2 & 4) | ((insn2 & 8) >> 3)) << 26)
- | (insn2 & (31ULL << 21)));
- }
- break;
- case 56: // lq
- if ((insn2 & 0xffff) != 0)
- return false;
- i1new = ((1ULL << 58) | (1ULL << 52)
- | (insn2 & ((63ULL << 26) | (31ULL << 21))));
- break;
- case 62: // std, stq
- if ((insn2 & 0xfffd) != 0)
- return false;
- i1new = ((1ULL << 58) | (1ULL << 52)
- | ((insn2 & 2) == 0 ? 61ULL << 26 : 60ULL << 26)
- | (insn2 & (31ULL << 21)));
- break;
- }
- *pinsn1 = i1new;
- *pinsn2 = (uint64_t) nop << 32;
- return true;
- }
- // Perform a relocation.
- template<int size, bool big_endian>
- inline bool
- Target_powerpc<size, big_endian>::Relocate::relocate(
- const Relocate_info<size, big_endian>* relinfo,
- unsigned int,
- Target_powerpc* target,
- Output_section* os,
- size_t relnum,
- const unsigned char* preloc,
- const Sized_symbol<size>* gsym,
- const Symbol_value<size>* psymval,
- unsigned char* view,
- Address address,
- section_size_type view_size)
- {
- typedef Powerpc_relocate_functions<size, big_endian> Reloc;
- typedef typename elfcpp::Swap<32, big_endian>::Valtype Insn;
- typedef typename elfcpp::Rela<size, big_endian> Reltype;
- if (view == NULL)
- return true;
- if (target->replace_tls_get_addr(gsym))
- gsym = static_cast<const Sized_symbol<size>*>(target->tls_get_addr_opt());
- const elfcpp::Rela<size, big_endian> rela(preloc);
- unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info());
- Powerpc_relobj<size, big_endian>* const object
- = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
- switch (this->maybe_skip_tls_get_addr_call(target, r_type, gsym))
- {
- case Track_tls::NOT_EXPECTED:
- // No warning. This will result in really old code without tls
- // marker relocs being mis-optimised, but there shouldn't be too
- // much of that code around. The problem with warning is that
- // glibc and libphobos both construct direct calls to
- // __tls_get_addr in a way that is harmless.
- break;
- case Track_tls::EXPECTED:
- // We have already complained.
- break;
- case Track_tls::SKIP:
- if (is_plt16_reloc<size>(r_type)
- || r_type == elfcpp::R_POWERPC_PLTSEQ
- || r_type == elfcpp::R_PPC64_PLTSEQ_NOTOC)
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- elfcpp::Swap<32, big_endian>::writeval(iview, nop);
- }
- else if (size == 64 && r_type == elfcpp::R_POWERPC_PLTCALL)
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1, nop);
- }
- else if (size == 64 && (r_type == elfcpp::R_PPC64_PLT_PCREL34
- || r_type == elfcpp::R_PPC64_PLT_PCREL34_NOTOC))
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- elfcpp::Swap<32, big_endian>::writeval(iview, pnop >> 32);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1, pnop & 0xffffffff);
- }
- return true;
- case Track_tls::NORMAL:
- break;
- }
- // Offset from start of insn to d-field reloc.
- const int d_offset = big_endian ? 2 : 0;
- Address value = 0;
- bool has_stub_value = false;
- bool localentry0 = false;
- unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
- bool use_plt_offset
- = (gsym != NULL
- ? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target))
- : object->local_has_plt_offset(r_sym));
- if (is_plt16_reloc<size>(r_type)
- || r_type == elfcpp::R_PPC64_PLT_PCREL34
- || r_type == elfcpp::R_PPC64_PLT_PCREL34_NOTOC
- || r_type == elfcpp::R_POWERPC_PLTSEQ
- || r_type == elfcpp::R_PPC64_PLTSEQ_NOTOC
- || r_type == elfcpp::R_POWERPC_PLTCALL
- || r_type == elfcpp::R_PPC64_PLTCALL_NOTOC)
- {
- // It would be possible to replace inline plt calls with direct
- // calls if the PLTCALL is in range. The only difficulty is
- // that the decision depends on the PLTCALL reloc, and we don't
- // know the address of that instruction when processing others
- // in the sequence. So the decision needs to be made in
- // do_relax(). For now, don't optimise inline plt calls.
- if (gsym)
- use_plt_offset = gsym->has_plt_offset();
- }
- if (use_plt_offset
- && !is_got_reloc(r_type)
- && !is_plt16_reloc<size>(r_type)
- && r_type != elfcpp::R_PPC64_PLT_PCREL34
- && r_type != elfcpp::R_PPC64_PLT_PCREL34_NOTOC
- && r_type != elfcpp::R_POWERPC_PLTSEQ
- && r_type != elfcpp::R_POWERPC_PLTCALL
- && r_type != elfcpp::R_PPC64_PLTSEQ_NOTOC
- && r_type != elfcpp::R_PPC64_PLTCALL_NOTOC
- && (!psymval->is_ifunc_symbol()
- || Scan::reloc_needs_plt_for_ifunc(target, object, r_type, false)))
- {
- if (size == 64
- && gsym != NULL
- && target->abiversion() >= 2
- && !parameters->options().output_is_position_independent()
- && !is_branch_reloc<size>(r_type))
- {
- Address off = target->glink_section()->find_global_entry(gsym);
- if (off != invalid_address)
- {
- value = target->glink_section()->global_entry_address() + off;
- has_stub_value = true;
- }
- }
- else
- {
- Stub_table<size, big_endian>* stub_table = NULL;
- if (target->stub_tables().size() == 1)
- stub_table = target->stub_tables()[0];
- if (stub_table == NULL
- && !(size == 32
- && gsym != NULL
- && !parameters->options().output_is_position_independent()
- && !is_branch_reloc<size>(r_type)))
- stub_table = object->stub_table(relinfo->data_shndx);
- if (stub_table == NULL)
- {
- // This is a ref from a data section to an ifunc symbol,
- // or a non-branch reloc for which we always want to use
- // one set of stubs for resolving function addresses.
- if (target->stub_tables().size() != 0)
- stub_table = target->stub_tables()[0];
- }
- if (stub_table != NULL)
- {
- const typename Stub_table<size, big_endian>::Plt_stub_ent* ent;
- if (gsym != NULL)
- ent = stub_table->find_plt_call_entry(object, gsym, r_type,
- rela.get_r_addend());
- else
- ent = stub_table->find_plt_call_entry(object, r_sym, r_type,
- rela.get_r_addend());
- if (ent != NULL)
- {
- value = stub_table->stub_address() + ent->off_;
- const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr);
- size_t reloc_count = shdr.get_sh_size() / reloc_size;
- if (size == 64)
- {
- if (r_type == elfcpp::R_PPC64_REL24_NOTOC)
- {
- if (!ent->notoc_)
- value += ent->p9off_;
- }
- else if (r_type == elfcpp::R_PPC64_REL24_P9NOTOC)
- value += ent->p9off_;
- else
- value += ent->tocoff_;
- }
- if (size == 64
- && ent->r2save_
- && !(gsym != NULL
- && target->is_tls_get_addr_opt(gsym)))
- {
- if (r_type == elfcpp::R_PPC64_REL24_NOTOC
- || r_type == elfcpp::R_PPC64_REL24_P9NOTOC)
- {
- if (!(target->power10_stubs()
- && target->power10_stubs_auto()))
- value += 4;
- }
- else if (relnum < reloc_count - 1)
- {
- Reltype next_rela(preloc + reloc_size);
- if (elfcpp::elf_r_type<size>(next_rela.get_r_info())
- == elfcpp::R_PPC64_TOCSAVE
- && (next_rela.get_r_offset()
- == rela.get_r_offset() + 4))
- value += 4;
- }
- }
- localentry0 = ent->localentry0_;
- has_stub_value = true;
- }
- }
- }
- // We don't care too much about bogus debug references to
- // non-local functions, but otherwise there had better be a plt
- // call stub or global entry stub as appropriate.
- gold_assert(has_stub_value || !(os->flags() & elfcpp::SHF_ALLOC));
- }
- if (use_plt_offset && (is_plt16_reloc<size>(r_type)
- || r_type == elfcpp::R_PPC64_PLT_PCREL34
- || r_type == elfcpp::R_PPC64_PLT_PCREL34_NOTOC))
- {
- const Output_data_plt_powerpc<size, big_endian>* plt;
- if (gsym)
- value = target->plt_off(gsym, &plt);
- else
- value = target->plt_off(object, r_sym, &plt);
- value += plt->address();
- if (size == 64)
- {
- if (r_type != elfcpp::R_PPC64_PLT_PCREL34
- && r_type != elfcpp::R_PPC64_PLT_PCREL34_NOTOC)
- value -= target->toc_pointer();
- }
- else if (parameters->options().output_is_position_independent())
- {
- if (rela.get_r_addend() >= 32768)
- {
- unsigned int got2 = object->got2_shndx();
- value -= (object->get_output_section_offset(got2)
- + object->output_section(got2)->address()
- + rela.get_r_addend());
- }
- else
- value -= target->toc_pointer();
- }
- }
- else if (!use_plt_offset
- && (is_plt16_reloc<size>(r_type)
- || r_type == elfcpp::R_POWERPC_PLTSEQ
- || r_type == elfcpp::R_PPC64_PLTSEQ_NOTOC))
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- elfcpp::Swap<32, big_endian>::writeval(iview, nop);
- r_type = elfcpp::R_POWERPC_NONE;
- }
- else if (!use_plt_offset
- && (r_type == elfcpp::R_PPC64_PLT_PCREL34
- || r_type == elfcpp::R_PPC64_PLT_PCREL34_NOTOC))
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- elfcpp::Swap<32, big_endian>::writeval(iview, pnop >> 32);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1, pnop & 0xffffffff);
- r_type = elfcpp::R_POWERPC_NONE;
- }
- else if (is_got_reloc(r_type))
- {
- uint64_t addend = size == 32 ? 0 : rela.get_r_addend();
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT16
- || r_type == elfcpp::R_PPC64_GOT16_DS)
- ? GOT_TYPE_SMALL : GOT_TYPE_STANDARD);
- if (gsym != NULL)
- value = gsym->got_offset(got_type, addend);
- else
- value = object->local_got_offset(r_sym, got_type, addend);
- if (r_type == elfcpp::R_PPC64_GOT_PCREL34)
- value += target->got_section(got_type)->address();
- else
- value -= target->got_base_offset(got_type);
- }
- else if (r_type == elfcpp::R_PPC64_TOC)
- {
- value = target->toc_pointer();
- }
- else if (gsym != NULL
- && (r_type == elfcpp::R_POWERPC_REL24
- || r_type == elfcpp::R_PPC_PLTREL24)
- && has_stub_value)
- {
- if (size == 64)
- {
- typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype;
- Valtype* wv = reinterpret_cast<Valtype*>(view);
- bool can_plt_call = localentry0 || target->is_tls_get_addr_opt(gsym);
- if (!can_plt_call && rela.get_r_offset() + 8 <= view_size)
- {
- Valtype insn = elfcpp::Swap<32, big_endian>::readval(wv);
- Valtype insn2 = elfcpp::Swap<32, big_endian>::readval(wv + 1);
- if ((insn & 1) != 0
- && (insn2 == nop
- || insn2 == cror_15_15_15 || insn2 == cror_31_31_31))
- {
- elfcpp::Swap<32, big_endian>::
- writeval(wv + 1, ld_2_1 + target->stk_toc());
- can_plt_call = true;
- }
- }
- if (!can_plt_call)
- {
- // If we don't have a branch and link followed by a nop,
- // we can't go via the plt because there is no place to
- // put a toc restoring instruction.
- // Unless we know we won't be returning.
- if (strcmp(gsym->name(), "__libc_start_main") == 0)
- can_plt_call = true;
- }
- if (!can_plt_call)
- {
- // g++ as of 20130507 emits self-calls without a
- // following nop. This is arguably wrong since we have
- // conflicting information. On the one hand a global
- // symbol and on the other a local call sequence, but
- // don't error for this special case.
- // It isn't possible to cheaply verify we have exactly
- // such a call. Allow all calls to the same section.
- bool ok = false;
- Address code = value;
- if (gsym->source() == Symbol::FROM_OBJECT
- && gsym->object() == object)
- {
- unsigned int dest_shndx = 0;
- if (target->abiversion() < 2)
- {
- Address addend = rela.get_r_addend();
- code = psymval->value(object, addend);
- target->symval_for_branch(relinfo->symtab, gsym, object,
- &code, &dest_shndx);
- }
- bool is_ordinary;
- if (dest_shndx == 0)
- dest_shndx = gsym->shndx(&is_ordinary);
- ok = dest_shndx == relinfo->data_shndx;
- }
- if (!ok)
- {
- gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
- _("call lacks nop, can't restore toc; "
- "recompile with -fPIC"));
- value = code;
- }
- }
- }
- }
- else if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA
- || r_type == elfcpp::R_PPC64_GOT_TLSGD_PCREL34)
- {
- // First instruction of a global dynamic sequence, arg setup insn.
- bool final = gsym == NULL || gsym->final_value_is_known();
- tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16)
- ? GOT_TYPE_SMALL : GOT_TYPE_STANDARD);
- if (tls_type == tls::TLSOPT_NONE)
- got_type = Got_type(got_type | GOT_TYPE_TLSGD);
- else if (tls_type == tls::TLSOPT_TO_IE)
- got_type = Got_type(got_type | GOT_TYPE_TPREL);
- if ((got_type & ~GOT_TYPE_SMALL) != GOT_TYPE_STANDARD)
- {
- uint64_t addend = size == 32 ? 0 : rela.get_r_addend();
- if (gsym != NULL)
- value = gsym->got_offset(got_type, addend);
- else
- value = object->local_got_offset(r_sym, got_type, addend);
- if (r_type == elfcpp::R_PPC64_GOT_TLSGD_PCREL34)
- value += target->got_section(got_type)->address();
- else
- value -= target->got_base_offset(got_type);
- }
- if (tls_type == tls::TLSOPT_TO_IE)
- {
- if (r_type == elfcpp::R_PPC64_GOT_TLSGD_PCREL34)
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- uint64_t pinsn = elfcpp::Swap<32, big_endian>::readval(iview);
- pinsn <<= 32;
- pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1);
- // pla -> pld
- pinsn += (-2ULL << 56) + (57ULL << 26) - (14ULL << 26);
- elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1,
- pinsn & 0xffffffff);
- r_type = elfcpp::R_PPC64_GOT_TPREL_PCREL34;
- }
- else
- {
- if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
- insn &= (1 << 26) - (1 << 16); // extract rt,ra from addi
- if (size == 32)
- insn |= 32 << 26; // lwz
- else
- insn |= 58 << 26; // ld
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- }
- r_type += (elfcpp::R_POWERPC_GOT_TPREL16
- - elfcpp::R_POWERPC_GOT_TLSGD16);
- }
- }
- else if (tls_type == tls::TLSOPT_TO_LE)
- {
- if (r_type == elfcpp::R_PPC64_GOT_TLSGD_PCREL34)
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- uint64_t pinsn = elfcpp::Swap<32, big_endian>::readval(iview);
- pinsn <<= 32;
- pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1);
- // pla pcrel -> paddi r13
- pinsn += (-1ULL << 52) + (13ULL << 16);
- elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1,
- pinsn & 0xffffffff);
- r_type = elfcpp::R_PPC64_TPREL34;
- value = psymval->value(object, rela.get_r_addend());
- }
- else
- {
- if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
- insn &= (1 << 26) - (1 << 21); // extract rt
- if (size == 32)
- insn |= addis_0_2;
- else
- insn |= addis_0_13;
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- r_type = elfcpp::R_POWERPC_TPREL16_HA;
- value = psymval->value(object, rela.get_r_addend());
- }
- else
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = nop;
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- r_type = elfcpp::R_POWERPC_NONE;
- }
- }
- }
- }
- else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
- || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
- || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
- || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA
- || r_type == elfcpp::R_PPC64_GOT_TLSLD_PCREL34)
- {
- // First instruction of a local dynamic sequence, arg setup insn.
- tls::Tls_optimization tls_type = target->optimize_tls_ld();
- if (tls_type == tls::TLSOPT_NONE)
- {
- value = target->tlsld_got_offset();
- if (r_type == elfcpp::R_PPC64_GOT_TLSLD_PCREL34)
- value += target->got_section(GOT_TYPE_SMALL)->address();
- else
- value -= target->got_base_offset(GOT_TYPE_SMALL);
- }
- else
- {
- gold_assert(tls_type == tls::TLSOPT_TO_LE);
- if (r_type == elfcpp::R_PPC64_GOT_TLSLD_PCREL34)
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- uint64_t pinsn = elfcpp::Swap<32, big_endian>::readval(iview);
- pinsn <<= 32;
- pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1);
- // pla pcrel -> paddi r13
- pinsn += (-1ULL << 52) + (13ULL << 16);
- elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1,
- pinsn & 0xffffffff);
- r_type = elfcpp::R_PPC64_TPREL34;
- value = dtp_offset;
- }
- else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
- || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
- insn &= (1 << 26) - (1 << 21); // extract rt
- if (size == 32)
- insn |= addis_0_2;
- else
- insn |= addis_0_13;
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- r_type = elfcpp::R_POWERPC_TPREL16_HA;
- value = dtp_offset;
- }
- else
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = nop;
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- r_type = elfcpp::R_POWERPC_NONE;
- }
- }
- }
- else if (r_type == elfcpp::R_POWERPC_GOT_DTPREL16
- || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_LO
- || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HI
- || r_type == elfcpp::R_POWERPC_GOT_DTPREL16_HA
- || r_type == elfcpp::R_PPC64_GOT_DTPREL_PCREL34)
- {
- // Accesses relative to a local dynamic sequence address,
- // no optimisation here.
- uint64_t addend = size == 32 ? 0 : rela.get_r_addend();
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_DTPREL16)
- ? GOT_TYPE_SMALL_DTPREL : GOT_TYPE_DTPREL);
- if (gsym != NULL)
- value = gsym->got_offset(got_type, addend);
- else
- value = object->local_got_offset(r_sym, got_type, addend);
- if (r_type == elfcpp::R_PPC64_GOT_DTPREL_PCREL34)
- value += target->got_section(got_type)->address();
- else
- value -= target->got_base_offset(got_type);
- }
- else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA
- || r_type == elfcpp::R_PPC64_GOT_TPREL_PCREL34)
- {
- // First instruction of initial exec sequence.
- bool final = gsym == NULL || gsym->final_value_is_known();
- tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
- if (tls_type == tls::TLSOPT_NONE)
- {
- uint64_t addend = size == 32 ? 0 : rela.get_r_addend();
- Got_type got_type = ((size == 32
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16)
- ? GOT_TYPE_SMALL_TPREL : GOT_TYPE_TPREL);
- if (gsym != NULL)
- value = gsym->got_offset(got_type, addend);
- else
- value = object->local_got_offset(r_sym, got_type, addend);
- if (r_type == elfcpp::R_PPC64_GOT_TPREL_PCREL34)
- value += target->got_section(got_type)->address();
- else
- value -= target->got_base_offset(got_type);
- }
- else
- {
- gold_assert(tls_type == tls::TLSOPT_TO_LE);
- if (r_type == elfcpp::R_PPC64_GOT_TPREL_PCREL34)
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- uint64_t pinsn = elfcpp::Swap<32, big_endian>::readval(iview);
- pinsn <<= 32;
- pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1);
- // pld ra,sym@got@tprel@pcrel -> paddi ra,r13,sym@tprel
- pinsn += ((2ULL << 56) + (-1ULL << 52)
- + (14ULL << 26) - (57ULL << 26) + (13ULL << 16));
- elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1,
- pinsn & 0xffffffff);
- r_type = elfcpp::R_PPC64_TPREL34;
- value = psymval->value(object, rela.get_r_addend());
- }
- else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
- insn &= (1 << 26) - (1 << 21); // extract rt from ld
- if (size == 32)
- insn |= addis_0_2;
- else
- insn |= addis_0_13;
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- r_type = elfcpp::R_POWERPC_TPREL16_HA;
- value = psymval->value(object, rela.get_r_addend());
- }
- else
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = nop;
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- r_type = elfcpp::R_POWERPC_NONE;
- }
- }
- }
- else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
- || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
- {
- // Second instruction of a global dynamic sequence,
- // the __tls_get_addr call
- this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
- bool final = gsym == NULL || gsym->final_value_is_known();
- tls::Tls_optimization tls_type = target->optimize_tls_gd(final);
- if (tls_type != tls::TLSOPT_NONE)
- {
- if (tls_type == tls::TLSOPT_TO_IE)
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- Insn insn = add_3_3_13;
- if (size == 32)
- insn = add_3_3_2;
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- r_type = elfcpp::R_POWERPC_NONE;
- }
- else
- {
- bool is_pcrel = false;
- const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr);
- size_t reloc_count = shdr.get_sh_size() / reloc_size;
- if (relnum < reloc_count - 1)
- {
- Reltype next_rela(preloc + reloc_size);
- unsigned int r_type2
- = elfcpp::elf_r_type<size>(next_rela.get_r_info());
- if ((r_type2 == elfcpp::R_PPC64_REL24_NOTOC
- || r_type2 == elfcpp::R_PPC64_REL24_P9NOTOC
- || r_type2 == elfcpp::R_PPC64_PLTCALL_NOTOC)
- && next_rela.get_r_offset() == rela.get_r_offset())
- is_pcrel = true;
- }
- Insn* iview = reinterpret_cast<Insn*>(view);
- if (is_pcrel)
- {
- elfcpp::Swap<32, big_endian>::writeval(iview, nop);
- r_type = elfcpp::R_POWERPC_NONE;
- }
- else
- {
- elfcpp::Swap<32, big_endian>::writeval(iview, addi_3_3);
- r_type = elfcpp::R_POWERPC_TPREL16_LO;
- view += d_offset;
- value = psymval->value(object, rela.get_r_addend());
- }
- }
- this->skip_next_tls_get_addr_call();
- }
- }
- else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
- || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
- {
- // Second instruction of a local dynamic sequence,
- // the __tls_get_addr call
- this->expect_tls_get_addr_call(relinfo, relnum, rela.get_r_offset());
- tls::Tls_optimization tls_type = target->optimize_tls_ld();
- if (tls_type == tls::TLSOPT_TO_LE)
- {
- bool is_pcrel = false;
- const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr);
- size_t reloc_count = shdr.get_sh_size() / reloc_size;
- if (relnum < reloc_count - 1)
- {
- Reltype next_rela(preloc + reloc_size);
- unsigned int r_type2
- = elfcpp::elf_r_type<size>(next_rela.get_r_info());
- if ((r_type2 == elfcpp::R_PPC64_REL24_NOTOC
- || r_type2 == elfcpp::R_PPC64_REL24_P9NOTOC
- || r_type2 == elfcpp::R_PPC64_PLTCALL_NOTOC)
- && next_rela.get_r_offset() == rela.get_r_offset())
- is_pcrel = true;
- }
- Insn* iview = reinterpret_cast<Insn*>(view);
- if (is_pcrel)
- {
- elfcpp::Swap<32, big_endian>::writeval(iview, nop);
- r_type = elfcpp::R_POWERPC_NONE;
- }
- else
- {
- elfcpp::Swap<32, big_endian>::writeval(iview, addi_3_3);
- r_type = elfcpp::R_POWERPC_TPREL16_LO;
- view += d_offset;
- value = dtp_offset;
- }
- this->skip_next_tls_get_addr_call();
- }
- }
- else if (r_type == elfcpp::R_POWERPC_TLS)
- {
- // Second instruction of an initial exec sequence
- bool final = gsym == NULL || gsym->final_value_is_known();
- tls::Tls_optimization tls_type = target->optimize_tls_ie(final);
- if (tls_type == tls::TLSOPT_TO_LE)
- {
- Address roff = rela.get_r_offset() & 3;
- Insn* iview = reinterpret_cast<Insn*>(view - roff);
- Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
- unsigned int reg = size == 32 ? 2 : 13;
- insn = at_tls_transform(insn, reg);
- gold_assert(insn != 0);
- if (roff == 0)
- {
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- r_type = elfcpp::R_POWERPC_TPREL16_LO;
- view += d_offset;
- value = psymval->value(object, rela.get_r_addend());
- }
- else if (roff == 1)
- {
- // For pcrel IE to LE we already have the full offset
- // and thus don't need an addi here. A nop or mr will do.
- if ((insn & (0x3f << 26)) == 14 << 26)
- {
- // Extract regs from addi rt,ra,si.
- unsigned int rt = (insn >> 21) & 0x1f;
- unsigned int ra = (insn >> 16) & 0x1f;
- if (rt == ra)
- insn = nop;
- else
- {
- // Build or ra,rs,rb with rb==rs, ie. mr ra,rs.
- insn = (rt << 16) | (ra << 21) | (ra << 11);
- insn |= (31u << 26) | (444u << 1);
- }
- }
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- r_type = elfcpp::R_POWERPC_NONE;
- }
- }
- }
- else if (!has_stub_value)
- {
- if (!use_plt_offset && (r_type == elfcpp::R_POWERPC_PLTCALL
- || r_type == elfcpp::R_PPC64_PLTCALL_NOTOC))
- {
- // PLTCALL without plt entry => convert to direct call
- Insn* iview = reinterpret_cast<Insn*>(view);
- Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
- insn = (insn & 1) | b;
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- if (size == 32)
- r_type = elfcpp::R_PPC_PLTREL24;
- else if (r_type == elfcpp::R_PPC64_PLTCALL_NOTOC)
- r_type = elfcpp::R_PPC64_REL24_NOTOC;
- else
- r_type = elfcpp::R_POWERPC_REL24;
- }
- Address addend = 0;
- if (!(size == 32
- && (r_type == elfcpp::R_PPC_PLTREL24
- || r_type == elfcpp::R_POWERPC_PLT16_LO
- || r_type == elfcpp::R_POWERPC_PLT16_HI
- || r_type == elfcpp::R_POWERPC_PLT16_HA)))
- addend = rela.get_r_addend();
- value = psymval->value(object, addend);
- unsigned int local_ent = 0;
- if (size == 64 && is_branch_reloc<size>(r_type))
- {
- if (target->abiversion() >= 2)
- {
- if (gsym != NULL)
- local_ent = object->ppc64_local_entry_offset(gsym);
- else
- local_ent = object->ppc64_local_entry_offset(r_sym);
- }
- else
- {
- unsigned int dest_shndx;
- target->symval_for_branch(relinfo->symtab, gsym, object,
- &value, &dest_shndx);
- }
- }
- Address max_branch = max_branch_delta<size>(r_type);
- if (max_branch != 0
- && (value + local_ent - address + max_branch >= 2 * max_branch
- || (size == 64
- && (r_type == elfcpp::R_PPC64_REL24_NOTOC
- || r_type == elfcpp::R_PPC64_REL24_NOTOC)
- && (gsym != NULL
- ? object->ppc64_needs_toc(gsym)
- : object->ppc64_needs_toc(r_sym)))))
- {
- Stub_table<size, big_endian>* stub_table
- = object->stub_table(relinfo->data_shndx);
- if (stub_table != NULL)
- {
- const typename Stub_table<size, big_endian>::Branch_stub_ent* ent
- = stub_table->find_long_branch_entry(value);
- if (ent != NULL)
- {
- if (ent->save_res_)
- value = (value - target->savres_section()->address()
- + stub_table->stub_address()
- + stub_table->plt_size()
- + stub_table->branch_size());
- else
- {
- value = (stub_table->stub_address()
- + stub_table->plt_size()
- + ent->off_);
- if (size == 64)
- {
- if (r_type == elfcpp::R_PPC64_REL24_NOTOC)
- {
- if (!ent->notoc_)
- value += ent->p9off_;
- }
- else if (r_type == elfcpp::R_PPC64_REL24_P9NOTOC)
- value += ent->p9off_;
- else
- value += ent->tocoff_;
- }
- }
- has_stub_value = true;
- }
- }
- }
- if (!has_stub_value)
- value += local_ent;
- }
- switch (r_type)
- {
- case elfcpp::R_PPC64_REL24_NOTOC:
- if (size == 32)
- break;
- // Fall through.
- case elfcpp::R_PPC64_REL24_P9NOTOC:
- case elfcpp::R_PPC64_REL64:
- case elfcpp::R_POWERPC_REL32:
- case elfcpp::R_POWERPC_REL24:
- case elfcpp::R_PPC_PLTREL24:
- case elfcpp::R_PPC_LOCAL24PC:
- case elfcpp::R_POWERPC_REL16:
- case elfcpp::R_POWERPC_REL16_LO:
- case elfcpp::R_POWERPC_REL16_HI:
- case elfcpp::R_POWERPC_REL16_HA:
- case elfcpp::R_POWERPC_REL16DX_HA:
- case elfcpp::R_PPC64_REL16_HIGH:
- case elfcpp::R_PPC64_REL16_HIGHA:
- case elfcpp::R_PPC64_REL16_HIGHER:
- case elfcpp::R_PPC64_REL16_HIGHERA:
- case elfcpp::R_PPC64_REL16_HIGHEST:
- case elfcpp::R_PPC64_REL16_HIGHESTA:
- case elfcpp::R_POWERPC_REL14:
- case elfcpp::R_POWERPC_REL14_BRTAKEN:
- case elfcpp::R_POWERPC_REL14_BRNTAKEN:
- case elfcpp::R_PPC64_PCREL34:
- case elfcpp::R_PPC64_GOT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34_NOTOC:
- case elfcpp::R_PPC64_PCREL28:
- case elfcpp::R_PPC64_GOT_TLSGD_PCREL34:
- case elfcpp::R_PPC64_GOT_TLSLD_PCREL34:
- case elfcpp::R_PPC64_GOT_TPREL_PCREL34:
- case elfcpp::R_PPC64_GOT_DTPREL_PCREL34:
- case elfcpp::R_PPC64_REL16_HIGHER34:
- case elfcpp::R_PPC64_REL16_HIGHERA34:
- case elfcpp::R_PPC64_REL16_HIGHEST34:
- case elfcpp::R_PPC64_REL16_HIGHESTA34:
- value -= address;
- break;
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_PPC64_TOC16_HI:
- case elfcpp::R_PPC64_TOC16_HA:
- case elfcpp::R_PPC64_TOC16_DS:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- // Subtract the TOC base address.
- value -= target->toc_pointer();
- break;
- case elfcpp::R_POWERPC_SECTOFF:
- case elfcpp::R_POWERPC_SECTOFF_LO:
- case elfcpp::R_POWERPC_SECTOFF_HI:
- case elfcpp::R_POWERPC_SECTOFF_HA:
- case elfcpp::R_PPC64_SECTOFF_DS:
- case elfcpp::R_PPC64_SECTOFF_LO_DS:
- if (os != NULL)
- value -= os->address();
- break;
- case elfcpp::R_PPC64_TPREL16_DS:
- case elfcpp::R_PPC64_TPREL16_LO_DS:
- case elfcpp::R_PPC64_TPREL16_HIGH:
- case elfcpp::R_PPC64_TPREL16_HIGHA:
- if (size != 64)
- // R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
- break;
- // Fall through.
- case elfcpp::R_POWERPC_TPREL16:
- case elfcpp::R_POWERPC_TPREL16_LO:
- case elfcpp::R_POWERPC_TPREL16_HI:
- case elfcpp::R_POWERPC_TPREL16_HA:
- case elfcpp::R_POWERPC_TPREL:
- case elfcpp::R_PPC64_TPREL16_HIGHER:
- case elfcpp::R_PPC64_TPREL16_HIGHERA:
- case elfcpp::R_PPC64_TPREL16_HIGHEST:
- case elfcpp::R_PPC64_TPREL16_HIGHESTA:
- case elfcpp::R_PPC64_TPREL34:
- // tls symbol values are relative to tls_segment()->vaddr()
- value -= tp_offset;
- break;
- case elfcpp::R_PPC64_DTPREL16_DS:
- case elfcpp::R_PPC64_DTPREL16_LO_DS:
- case elfcpp::R_PPC64_DTPREL16_HIGHER:
- case elfcpp::R_PPC64_DTPREL16_HIGHERA:
- case elfcpp::R_PPC64_DTPREL16_HIGHEST:
- case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
- if (size != 64)
- // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
- // R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
- break;
- // Fall through.
- case elfcpp::R_POWERPC_DTPREL16:
- case elfcpp::R_POWERPC_DTPREL16_LO:
- case elfcpp::R_POWERPC_DTPREL16_HI:
- case elfcpp::R_POWERPC_DTPREL16_HA:
- case elfcpp::R_POWERPC_DTPREL:
- case elfcpp::R_PPC64_DTPREL16_HIGH:
- case elfcpp::R_PPC64_DTPREL16_HIGHA:
- case elfcpp::R_PPC64_DTPREL34:
- // tls symbol values are relative to tls_segment()->vaddr()
- value -= dtp_offset;
- break;
- case elfcpp::R_PPC64_ADDR64_LOCAL:
- if (gsym != NULL)
- value += object->ppc64_local_entry_offset(gsym);
- else
- value += object->ppc64_local_entry_offset(r_sym);
- break;
- default:
- break;
- }
- Insn branch_bit = 0;
- switch (r_type)
- {
- case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
- case elfcpp::R_POWERPC_REL14_BRTAKEN:
- branch_bit = 1 << 21;
- // Fall through.
- case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
- case elfcpp::R_POWERPC_REL14_BRNTAKEN:
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
- insn &= ~(1 << 21);
- insn |= branch_bit;
- if (this->is_isa_v2)
- {
- // Set 'a' bit. This is 0b00010 in BO field for branch
- // on CR(BI) insns (BO == 001at or 011at), and 0b01000
- // for branch on CTR insns (BO == 1a00t or 1a01t).
- if ((insn & (0x14 << 21)) == (0x04 << 21))
- insn |= 0x02 << 21;
- else if ((insn & (0x14 << 21)) == (0x10 << 21))
- insn |= 0x08 << 21;
- else
- break;
- }
- else
- {
- // Invert 'y' bit if not the default.
- if (static_cast<Signed_address>(value) < 0)
- insn ^= 1 << 21;
- }
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- }
- break;
- case elfcpp::R_POWERPC_PLT16_HA:
- if (size == 32
- && !parameters->options().output_is_position_independent())
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
- // Convert addis to lis.
- if ((insn & (0x3f << 26)) == 15u << 26
- && (insn & (0x1f << 16)) != 0)
- {
- insn &= ~(0x1f << 16);
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- }
- }
- break;
- default:
- break;
- }
- if (gsym
- ? relative_value_is_known(gsym)
- : relative_value_is_known(psymval))
- {
- Insn* iview;
- Insn* iview2;
- Insn insn;
- uint64_t pinsn, pinsn2;
- switch (r_type)
- {
- default:
- break;
- // Multi-instruction sequences that access the GOT/TOC can
- // be optimized, eg.
- // addis ra,r2,x@got@ha; ld rb,x@got@l(ra);
- // to addis ra,r2,x@toc@ha; addi rb,ra,x@toc@l;
- // and
- // addis ra,r2,0; addi rb,ra,x@toc@l;
- // to nop; addi rb,r2,x@toc;
- case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
- case elfcpp::R_POWERPC_GOT_TPREL16_HA:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
- case elfcpp::R_POWERPC_GOT16_HA:
- case elfcpp::R_PPC64_TOC16_HA:
- if (size == 64 && parameters->options().toc_optimize())
- {
- iview = reinterpret_cast<Insn*>(view - d_offset);
- insn = elfcpp::Swap<32, big_endian>::readval(iview);
- if ((r_type == elfcpp::R_PPC64_TOC16_HA
- && object->make_toc_relative(target, &value))
- || (r_type == elfcpp::R_POWERPC_GOT16_HA
- && object->make_got_relative(target, psymval,
- rela.get_r_addend(),
- &value)))
- {
- gold_assert((insn & ((0x3f << 26) | 0x1f << 16))
- == ((15u << 26) | (2 << 16)));
- }
- if (((insn & ((0x3f << 26) | 0x1f << 16))
- == ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
- && value + 0x8000 < 0x10000)
- {
- elfcpp::Swap<32, big_endian>::writeval(iview, nop);
- return true;
- }
- }
- break;
- case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
- case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
- case elfcpp::R_POWERPC_GOT_TPREL16_LO:
- case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
- case elfcpp::R_POWERPC_GOT16_LO:
- case elfcpp::R_PPC64_GOT16_LO_DS:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- if (size == 64 && parameters->options().toc_optimize())
- {
- iview = reinterpret_cast<Insn*>(view - d_offset);
- insn = elfcpp::Swap<32, big_endian>::readval(iview);
- bool changed = false;
- if ((r_type == elfcpp::R_PPC64_TOC16_LO_DS
- && object->make_toc_relative(target, &value))
- || (r_type == elfcpp::R_PPC64_GOT16_LO_DS
- && object->make_got_relative(target, psymval,
- rela.get_r_addend(),
- &value)))
- {
- gold_assert ((insn & (0x3f << 26)) == 58u << 26 /* ld */);
- insn ^= (14u << 26) ^ (58u << 26);
- r_type = elfcpp::R_PPC64_TOC16_LO;
- changed = true;
- }
- if (ok_lo_toc_insn(insn, r_type)
- && value + 0x8000 < 0x10000)
- {
- if ((insn & (0x3f << 26)) == 12u << 26 /* addic */)
- {
- // Transform addic to addi when we change reg.
- insn &= ~((0x3f << 26) | (0x1f << 16));
- insn |= (14u << 26) | (2 << 16);
- }
- else
- {
- insn &= ~(0x1f << 16);
- insn |= 2 << 16;
- }
- changed = true;
- }
- if (changed)
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- }
- break;
- case elfcpp::R_PPC64_GOT_PCREL34:
- if (size == 64 && parameters->options().toc_optimize())
- {
- iview = reinterpret_cast<Insn*>(view);
- pinsn = elfcpp::Swap<32, big_endian>::readval(iview);
- pinsn <<= 32;
- pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1);
- if ((pinsn & ((-1ULL << 50) | (63ULL << 26)))
- != ((1ULL << 58) | (1ULL << 52) | (57ULL << 26) /* pld */))
- break;
- Address relval = psymval->value(object, rela.get_r_addend());
- relval -= address;
- if (relval + (1ULL << 33) < 1ULL << 34)
- {
- value = relval;
- // Replace with paddi
- pinsn += (2ULL << 56) + (14ULL << 26) - (57ULL << 26);
- elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1,
- pinsn & 0xffffffff);
- goto pcrelopt;
- }
- }
- break;
- case elfcpp::R_PPC64_PCREL34:
- if (size == 64)
- {
- iview = reinterpret_cast<Insn*>(view);
- pinsn = elfcpp::Swap<32, big_endian>::readval(iview);
- pinsn <<= 32;
- pinsn |= elfcpp::Swap<32, big_endian>::readval(iview + 1);
- if ((pinsn & ((-1ULL << 50) | (63ULL << 26)))
- != ((1ULL << 58) | (2ULL << 56) | (1ULL << 52)
- | (14ULL << 26) /* paddi */))
- break;
- pcrelopt:
- const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr);
- size_t reloc_count = shdr.get_sh_size() / reloc_size;
- if (relnum >= reloc_count - 1)
- break;
- Reltype next_rela(preloc + reloc_size);
- if ((elfcpp::elf_r_type<size>(next_rela.get_r_info())
- != elfcpp::R_PPC64_PCREL_OPT)
- || next_rela.get_r_offset() != rela.get_r_offset())
- break;
- Address off = next_rela.get_r_addend();
- if (off == 0)
- off = 8; // zero means next insn.
- if (off + rela.get_r_offset() + 4 > view_size)
- break;
- iview2 = reinterpret_cast<Insn*>(view + off);
- pinsn2 = elfcpp::Swap<32, big_endian>::readval(iview2);
- pinsn2 <<= 32;
- if ((pinsn2 & (63ULL << 58)) == 1ULL << 58)
- break;
- if (xlate_pcrel_opt(&pinsn, &pinsn2))
- {
- elfcpp::Swap<32, big_endian>::writeval(iview, pinsn >> 32);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1,
- pinsn & 0xffffffff);
- elfcpp::Swap<32, big_endian>::writeval(iview2, pinsn2 >> 32);
- }
- }
- break;
- case elfcpp::R_POWERPC_TPREL16_HA:
- if (target->tprel_opt() && value + 0x8000 < 0x10000)
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- elfcpp::Swap<32, big_endian>::writeval(iview, nop);
- return true;
- }
- break;
- case elfcpp::R_PPC64_TPREL16_LO_DS:
- if (size == 32)
- // R_PPC_TLSGD, R_PPC_TLSLD
- break;
- // Fall through.
- case elfcpp::R_POWERPC_TPREL16_LO:
- if (target->tprel_opt() && value + 0x8000 < 0x10000)
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = elfcpp::Swap<32, big_endian>::readval(iview);
- insn &= ~(0x1f << 16);
- insn |= (size == 32 ? 2 : 13) << 16;
- elfcpp::Swap<32, big_endian>::writeval(iview, insn);
- }
- break;
- case elfcpp::R_PPC64_ENTRY:
- if (size == 64)
- {
- value = target->toc_pointer();
- if (value + 0x80008000 <= 0xffffffff
- && !parameters->options().output_is_position_independent())
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview);
- Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1);
- if ((insn1 & ~0xfffc) == ld_2_12
- && insn2 == add_2_2_12)
- {
- insn1 = lis_2 + ha(value);
- elfcpp::Swap<32, big_endian>::writeval(iview, insn1);
- insn2 = addi_2_2 + l(value);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2);
- return true;
- }
- }
- else
- {
- value -= address;
- if (value + 0x80008000 <= 0xffffffff)
- {
- Insn* iview = reinterpret_cast<Insn*>(view);
- Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview);
- Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview + 1);
- if ((insn1 & ~0xfffc) == ld_2_12
- && insn2 == add_2_2_12)
- {
- insn1 = addis_2_12 + ha(value);
- elfcpp::Swap<32, big_endian>::writeval(iview, insn1);
- insn2 = addi_2_2 + l(value);
- elfcpp::Swap<32, big_endian>::writeval(iview + 1, insn2);
- return true;
- }
- }
- }
- }
- break;
- case elfcpp::R_POWERPC_REL16_LO:
- // If we are generating a non-PIC executable, edit
- // 0: addis 2,12,.TOC.-0b@ha
- // addi 2,2,.TOC.-0b@l
- // used by ELFv2 global entry points to set up r2, to
- // lis 2,.TOC.@ha
- // addi 2,2,.TOC.@l
- // if .TOC. is in range. */
- if (size == 64
- && value + address - 4 + 0x80008000 <= 0xffffffff
- && relnum + 1 > 1
- && preloc != NULL
- && target->abiversion() >= 2
- && !parameters->options().output_is_position_independent()
- && rela.get_r_addend() == d_offset + 4
- && gsym != NULL
- && strcmp(gsym->name(), ".TOC.") == 0)
- {
- const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- Reltype prev_rela(preloc - reloc_size);
- if ((prev_rela.get_r_info()
- == elfcpp::elf_r_info<size>(r_sym,
- elfcpp::R_POWERPC_REL16_HA))
- && prev_rela.get_r_offset() + 4 == rela.get_r_offset()
- && prev_rela.get_r_addend() + 4 == rela.get_r_addend())
- {
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn1 = elfcpp::Swap<32, big_endian>::readval(iview - 1);
- Insn insn2 = elfcpp::Swap<32, big_endian>::readval(iview);
- if ((insn1 & 0xffff0000) == addis_2_12
- && (insn2 & 0xffff0000) == addi_2_2)
- {
- insn1 = lis_2 + ha(value + address - 4);
- elfcpp::Swap<32, big_endian>::writeval(iview - 1, insn1);
- insn2 = addi_2_2 + l(value + address - 4);
- elfcpp::Swap<32, big_endian>::writeval(iview, insn2);
- if (relinfo->rr)
- {
- relinfo->rr->set_strategy(relnum - 1,
- Relocatable_relocs::RELOC_SPECIAL);
- relinfo->rr->set_strategy(relnum,
- Relocatable_relocs::RELOC_SPECIAL);
- }
- return true;
- }
- }
- }
- break;
- }
- }
- typename Reloc::Overflow_check overflow = Reloc::CHECK_NONE;
- elfcpp::Shdr<size, big_endian> shdr(relinfo->data_shdr);
- switch (r_type)
- {
- case elfcpp::R_POWERPC_ADDR32:
- case elfcpp::R_POWERPC_UADDR32:
- if (size == 64)
- overflow = Reloc::CHECK_BITFIELD;
- break;
- case elfcpp::R_POWERPC_REL32:
- case elfcpp::R_POWERPC_REL16DX_HA:
- if (size == 64)
- overflow = Reloc::CHECK_SIGNED;
- break;
- case elfcpp::R_POWERPC_UADDR16:
- overflow = Reloc::CHECK_BITFIELD;
- break;
- case elfcpp::R_POWERPC_ADDR16:
- // We really should have three separate relocations,
- // one for 16-bit data, one for insns with 16-bit signed fields,
- // and one for insns with 16-bit unsigned fields.
- overflow = Reloc::CHECK_BITFIELD;
- if ((shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0)
- overflow = Reloc::CHECK_LOW_INSN;
- break;
- case elfcpp::R_POWERPC_ADDR16_HI:
- case elfcpp::R_POWERPC_ADDR16_HA:
- case elfcpp::R_POWERPC_GOT16_HI:
- case elfcpp::R_POWERPC_GOT16_HA:
- case elfcpp::R_POWERPC_PLT16_HI:
- case elfcpp::R_POWERPC_PLT16_HA:
- case elfcpp::R_POWERPC_SECTOFF_HI:
- case elfcpp::R_POWERPC_SECTOFF_HA:
- case elfcpp::R_PPC64_TOC16_HI:
- case elfcpp::R_PPC64_TOC16_HA:
- case elfcpp::R_PPC64_PLTGOT16_HI:
- case elfcpp::R_PPC64_PLTGOT16_HA:
- case elfcpp::R_POWERPC_TPREL16_HI:
- case elfcpp::R_POWERPC_TPREL16_HA:
- case elfcpp::R_POWERPC_DTPREL16_HI:
- case elfcpp::R_POWERPC_DTPREL16_HA:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
- case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
- case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
- case elfcpp::R_POWERPC_GOT_TPREL16_HI:
- case elfcpp::R_POWERPC_GOT_TPREL16_HA:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
- case elfcpp::R_POWERPC_REL16_HI:
- case elfcpp::R_POWERPC_REL16_HA:
- if (size != 32)
- overflow = Reloc::CHECK_HIGH_INSN;
- break;
- case elfcpp::R_POWERPC_REL16:
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_POWERPC_GOT16:
- case elfcpp::R_POWERPC_SECTOFF:
- case elfcpp::R_POWERPC_TPREL16:
- case elfcpp::R_POWERPC_DTPREL16:
- case elfcpp::R_POWERPC_GOT_TLSGD16:
- case elfcpp::R_POWERPC_GOT_TLSLD16:
- case elfcpp::R_POWERPC_GOT_TPREL16:
- case elfcpp::R_POWERPC_GOT_DTPREL16:
- overflow = Reloc::CHECK_LOW_INSN;
- break;
- case elfcpp::R_PPC64_REL24_NOTOC:
- if (size == 32)
- break;
- // Fall through.
- case elfcpp::R_PPC64_REL24_P9NOTOC:
- case elfcpp::R_POWERPC_ADDR24:
- case elfcpp::R_POWERPC_ADDR14:
- case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
- case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
- case elfcpp::R_PPC64_ADDR16_DS:
- case elfcpp::R_POWERPC_REL24:
- case elfcpp::R_PPC_PLTREL24:
- case elfcpp::R_PPC_LOCAL24PC:
- case elfcpp::R_PPC64_TPREL16_DS:
- case elfcpp::R_PPC64_DTPREL16_DS:
- case elfcpp::R_PPC64_TOC16_DS:
- case elfcpp::R_PPC64_GOT16_DS:
- case elfcpp::R_PPC64_SECTOFF_DS:
- case elfcpp::R_POWERPC_REL14:
- case elfcpp::R_POWERPC_REL14_BRTAKEN:
- case elfcpp::R_POWERPC_REL14_BRNTAKEN:
- case elfcpp::R_PPC64_D34:
- case elfcpp::R_PPC64_PCREL34:
- case elfcpp::R_PPC64_GOT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34_NOTOC:
- case elfcpp::R_PPC64_D28:
- case elfcpp::R_PPC64_PCREL28:
- case elfcpp::R_PPC64_TPREL34:
- case elfcpp::R_PPC64_DTPREL34:
- case elfcpp::R_PPC64_GOT_TLSGD_PCREL34:
- case elfcpp::R_PPC64_GOT_TLSLD_PCREL34:
- case elfcpp::R_PPC64_GOT_TPREL_PCREL34:
- case elfcpp::R_PPC64_GOT_DTPREL_PCREL34:
- overflow = Reloc::CHECK_SIGNED;
- break;
- }
- Insn* iview = reinterpret_cast<Insn*>(view - d_offset);
- Insn insn = 0;
- if (overflow == Reloc::CHECK_LOW_INSN
- || overflow == Reloc::CHECK_HIGH_INSN)
- {
- insn = elfcpp::Swap<32, big_endian>::readval(iview);
- if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
- overflow = Reloc::CHECK_BITFIELD;
- else if (overflow == Reloc::CHECK_LOW_INSN
- ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */
- || (insn & (0x3f << 26)) == 24u << 26 /* ori */
- || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
- : ((insn & (0x3f << 26)) == 29u << 26 /* andis */
- || (insn & (0x3f << 26)) == 25u << 26 /* oris */
- || (insn & (0x3f << 26)) == 27u << 26 /* xoris */))
- overflow = Reloc::CHECK_UNSIGNED;
- else
- overflow = Reloc::CHECK_SIGNED;
- }
- bool maybe_dq_reloc = false;
- typename Powerpc_relocate_functions<size, big_endian>::Status status
- = Powerpc_relocate_functions<size, big_endian>::STATUS_OK;
- switch (r_type)
- {
- case elfcpp::R_POWERPC_NONE:
- case elfcpp::R_POWERPC_TLS:
- case elfcpp::R_POWERPC_GNU_VTINHERIT:
- case elfcpp::R_POWERPC_GNU_VTENTRY:
- case elfcpp::R_POWERPC_PLTSEQ:
- case elfcpp::R_POWERPC_PLTCALL:
- case elfcpp::R_PPC64_PLTSEQ_NOTOC:
- case elfcpp::R_PPC64_PLTCALL_NOTOC:
- case elfcpp::R_PPC64_PCREL_OPT:
- break;
- case elfcpp::R_PPC64_ADDR64:
- case elfcpp::R_PPC64_REL64:
- case elfcpp::R_PPC64_TOC:
- case elfcpp::R_PPC64_ADDR64_LOCAL:
- Reloc::addr64(view, value);
- break;
- case elfcpp::R_POWERPC_TPREL:
- case elfcpp::R_POWERPC_DTPREL:
- if (size == 64)
- Reloc::addr64(view, value);
- else
- status = Reloc::addr32(view, value, overflow);
- break;
- case elfcpp::R_PPC64_UADDR64:
- Reloc::addr64_u(view, value);
- break;
- case elfcpp::R_POWERPC_ADDR32:
- status = Reloc::addr32(view, value, overflow);
- break;
- case elfcpp::R_POWERPC_REL32:
- case elfcpp::R_POWERPC_UADDR32:
- status = Reloc::addr32_u(view, value, overflow);
- break;
- case elfcpp::R_PPC64_REL24_NOTOC:
- if (size == 32)
- goto unsupp; // R_PPC_EMB_RELSDA
- // Fall through.
- case elfcpp::R_PPC64_REL24_P9NOTOC:
- case elfcpp::R_POWERPC_ADDR24:
- case elfcpp::R_POWERPC_REL24:
- case elfcpp::R_PPC_PLTREL24:
- case elfcpp::R_PPC_LOCAL24PC:
- status = Reloc::addr24(view, value, overflow);
- break;
- case elfcpp::R_POWERPC_GOT_DTPREL16:
- case elfcpp::R_POWERPC_GOT_DTPREL16_LO:
- case elfcpp::R_POWERPC_GOT_TPREL16:
- case elfcpp::R_POWERPC_GOT_TPREL16_LO:
- if (size == 64)
- {
- // On ppc64 these are all ds form
- maybe_dq_reloc = true;
- break;
- }
- // Fall through.
- case elfcpp::R_POWERPC_ADDR16:
- case elfcpp::R_POWERPC_REL16:
- case elfcpp::R_PPC64_TOC16:
- case elfcpp::R_POWERPC_GOT16:
- case elfcpp::R_POWERPC_SECTOFF:
- case elfcpp::R_POWERPC_TPREL16:
- case elfcpp::R_POWERPC_DTPREL16:
- case elfcpp::R_POWERPC_GOT_TLSGD16:
- case elfcpp::R_POWERPC_GOT_TLSLD16:
- case elfcpp::R_POWERPC_ADDR16_LO:
- case elfcpp::R_POWERPC_REL16_LO:
- case elfcpp::R_PPC64_TOC16_LO:
- case elfcpp::R_POWERPC_GOT16_LO:
- case elfcpp::R_POWERPC_PLT16_LO:
- case elfcpp::R_POWERPC_SECTOFF_LO:
- case elfcpp::R_POWERPC_TPREL16_LO:
- case elfcpp::R_POWERPC_DTPREL16_LO:
- case elfcpp::R_POWERPC_GOT_TLSGD16_LO:
- case elfcpp::R_POWERPC_GOT_TLSLD16_LO:
- if (size == 64)
- status = Reloc::addr16(view, value, overflow);
- else
- maybe_dq_reloc = true;
- break;
- case elfcpp::R_POWERPC_UADDR16:
- status = Reloc::addr16_u(view, value, overflow);
- break;
- case elfcpp::R_PPC64_ADDR16_HIGH:
- case elfcpp::R_PPC64_TPREL16_HIGH:
- case elfcpp::R_PPC64_DTPREL16_HIGH:
- if (size == 32)
- // R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
- goto unsupp;
- // Fall through.
- case elfcpp::R_POWERPC_ADDR16_HI:
- case elfcpp::R_POWERPC_REL16_HI:
- case elfcpp::R_PPC64_REL16_HIGH:
- case elfcpp::R_PPC64_TOC16_HI:
- case elfcpp::R_POWERPC_GOT16_HI:
- case elfcpp::R_POWERPC_PLT16_HI:
- case elfcpp::R_POWERPC_SECTOFF_HI:
- case elfcpp::R_POWERPC_TPREL16_HI:
- case elfcpp::R_POWERPC_DTPREL16_HI:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HI:
- case elfcpp::R_POWERPC_GOT_TLSLD16_HI:
- case elfcpp::R_POWERPC_GOT_TPREL16_HI:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HI:
- Reloc::addr16_hi(view, value);
- break;
- case elfcpp::R_PPC64_ADDR16_HIGHA:
- case elfcpp::R_PPC64_TPREL16_HIGHA:
- case elfcpp::R_PPC64_DTPREL16_HIGHA:
- if (size == 32)
- // R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
- goto unsupp;
- // Fall through.
- case elfcpp::R_POWERPC_ADDR16_HA:
- case elfcpp::R_POWERPC_REL16_HA:
- case elfcpp::R_PPC64_REL16_HIGHA:
- case elfcpp::R_PPC64_TOC16_HA:
- case elfcpp::R_POWERPC_GOT16_HA:
- case elfcpp::R_POWERPC_PLT16_HA:
- case elfcpp::R_POWERPC_SECTOFF_HA:
- case elfcpp::R_POWERPC_TPREL16_HA:
- case elfcpp::R_POWERPC_DTPREL16_HA:
- case elfcpp::R_POWERPC_GOT_TLSGD16_HA:
- case elfcpp::R_POWERPC_GOT_TLSLD16_HA:
- case elfcpp::R_POWERPC_GOT_TPREL16_HA:
- case elfcpp::R_POWERPC_GOT_DTPREL16_HA:
- Reloc::addr16_ha(view, value);
- break;
- case elfcpp::R_POWERPC_REL16DX_HA:
- status = Reloc::addr16dx_ha(view, value, overflow);
- break;
- case elfcpp::R_PPC64_DTPREL16_HIGHER:
- if (size == 32)
- // R_PPC_EMB_NADDR16_LO
- goto unsupp;
- // Fall through.
- case elfcpp::R_PPC64_ADDR16_HIGHER:
- case elfcpp::R_PPC64_REL16_HIGHER:
- case elfcpp::R_PPC64_TPREL16_HIGHER:
- Reloc::addr16_hi2(view, value);
- break;
- case elfcpp::R_PPC64_DTPREL16_HIGHERA:
- if (size == 32)
- // R_PPC_EMB_NADDR16_HI
- goto unsupp;
- // Fall through.
- case elfcpp::R_PPC64_ADDR16_HIGHERA:
- case elfcpp::R_PPC64_REL16_HIGHERA:
- case elfcpp::R_PPC64_TPREL16_HIGHERA:
- Reloc::addr16_ha2(view, value);
- break;
- case elfcpp::R_PPC64_DTPREL16_HIGHEST:
- if (size == 32)
- // R_PPC_EMB_NADDR16_HA
- goto unsupp;
- // Fall through.
- case elfcpp::R_PPC64_ADDR16_HIGHEST:
- case elfcpp::R_PPC64_REL16_HIGHEST:
- case elfcpp::R_PPC64_TPREL16_HIGHEST:
- Reloc::addr16_hi3(view, value);
- break;
- case elfcpp::R_PPC64_DTPREL16_HIGHESTA:
- if (size == 32)
- // R_PPC_EMB_SDAI16
- goto unsupp;
- // Fall through.
- case elfcpp::R_PPC64_ADDR16_HIGHESTA:
- case elfcpp::R_PPC64_REL16_HIGHESTA:
- case elfcpp::R_PPC64_TPREL16_HIGHESTA:
- Reloc::addr16_ha3(view, value);
- break;
- case elfcpp::R_PPC64_DTPREL16_DS:
- case elfcpp::R_PPC64_DTPREL16_LO_DS:
- if (size == 32)
- // R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
- goto unsupp;
- // Fall through.
- case elfcpp::R_PPC64_TPREL16_DS:
- case elfcpp::R_PPC64_TPREL16_LO_DS:
- if (size == 32)
- // R_PPC_TLSGD, R_PPC_TLSLD
- break;
- // Fall through.
- case elfcpp::R_PPC64_ADDR16_DS:
- case elfcpp::R_PPC64_ADDR16_LO_DS:
- case elfcpp::R_PPC64_TOC16_DS:
- case elfcpp::R_PPC64_TOC16_LO_DS:
- case elfcpp::R_PPC64_GOT16_DS:
- case elfcpp::R_PPC64_GOT16_LO_DS:
- case elfcpp::R_PPC64_PLT16_LO_DS:
- case elfcpp::R_PPC64_SECTOFF_DS:
- case elfcpp::R_PPC64_SECTOFF_LO_DS:
- maybe_dq_reloc = true;
- break;
- case elfcpp::R_POWERPC_ADDR14:
- case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
- case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
- case elfcpp::R_POWERPC_REL14:
- case elfcpp::R_POWERPC_REL14_BRTAKEN:
- case elfcpp::R_POWERPC_REL14_BRNTAKEN:
- status = Reloc::addr14(view, value, overflow);
- break;
- case elfcpp::R_POWERPC_COPY:
- case elfcpp::R_POWERPC_GLOB_DAT:
- case elfcpp::R_POWERPC_JMP_SLOT:
- case elfcpp::R_POWERPC_RELATIVE:
- case elfcpp::R_POWERPC_DTPMOD:
- case elfcpp::R_PPC64_JMP_IREL:
- case elfcpp::R_POWERPC_IRELATIVE:
- gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
- _("unexpected reloc %u in object file"),
- r_type);
- break;
- case elfcpp::R_PPC64_TOCSAVE:
- if (size == 32)
- // R_PPC_EMB_SDA21
- goto unsupp;
- else
- {
- Symbol_location loc;
- loc.object = relinfo->object;
- loc.shndx = relinfo->data_shndx;
- loc.offset = rela.get_r_offset();
- const Tocsave_loc *tocsave = target->tocsave_loc();
- if (tocsave->find(loc) != tocsave->end())
- {
- // If we've generated plt calls using this tocsave, then
- // the nop needs to be changed to save r2.
- Insn* iview = reinterpret_cast<Insn*>(view);
- if (elfcpp::Swap<32, big_endian>::readval(iview) == nop)
- elfcpp::Swap<32, big_endian>::
- writeval(iview, std_2_1 + target->stk_toc());
- }
- }
- break;
- case elfcpp::R_PPC_EMB_SDA2I16:
- case elfcpp::R_PPC_EMB_SDA2REL:
- if (size == 32)
- goto unsupp;
- // R_PPC64_TLSGD, R_PPC64_TLSLD
- break;
- case elfcpp::R_PPC64_D34:
- case elfcpp::R_PPC64_D34_LO:
- case elfcpp::R_PPC64_PCREL34:
- case elfcpp::R_PPC64_GOT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34:
- case elfcpp::R_PPC64_PLT_PCREL34_NOTOC:
- case elfcpp::R_PPC64_TPREL34:
- case elfcpp::R_PPC64_DTPREL34:
- case elfcpp::R_PPC64_GOT_TLSGD_PCREL34:
- case elfcpp::R_PPC64_GOT_TLSLD_PCREL34:
- case elfcpp::R_PPC64_GOT_TPREL_PCREL34:
- case elfcpp::R_PPC64_GOT_DTPREL_PCREL34:
- if (size == 32)
- goto unsupp;
- status = Reloc::addr34(view, value, overflow);
- break;
- case elfcpp::R_PPC64_D34_HI30:
- if (size == 32)
- goto unsupp;
- Reloc::addr34_hi(view, value);
- break;
- case elfcpp::R_PPC64_D34_HA30:
- if (size == 32)
- goto unsupp;
- Reloc::addr34_ha(view, value);
- break;
- case elfcpp::R_PPC64_D28:
- case elfcpp::R_PPC64_PCREL28:
- if (size == 32)
- goto unsupp;
- status = Reloc::addr28(view, value, overflow);
- break;
- case elfcpp::R_PPC64_ADDR16_HIGHER34:
- case elfcpp::R_PPC64_REL16_HIGHER34:
- if (size == 32)
- goto unsupp;
- Reloc::addr16_higher34(view, value);
- break;
- case elfcpp::R_PPC64_ADDR16_HIGHERA34:
- case elfcpp::R_PPC64_REL16_HIGHERA34:
- if (size == 32)
- goto unsupp;
- Reloc::addr16_highera34(view, value);
- break;
- case elfcpp::R_PPC64_ADDR16_HIGHEST34:
- case elfcpp::R_PPC64_REL16_HIGHEST34:
- if (size == 32)
- goto unsupp;
- Reloc::addr16_highest34(view, value);
- break;
- case elfcpp::R_PPC64_ADDR16_HIGHESTA34:
- case elfcpp::R_PPC64_REL16_HIGHESTA34:
- if (size == 32)
- goto unsupp;
- Reloc::addr16_highesta34(view, value);
- break;
- case elfcpp::R_POWERPC_PLT32:
- case elfcpp::R_POWERPC_PLTREL32:
- case elfcpp::R_PPC_SDAREL16:
- case elfcpp::R_POWERPC_ADDR30:
- case elfcpp::R_PPC64_PLT64:
- case elfcpp::R_PPC64_PLTREL64:
- case elfcpp::R_PPC64_PLTGOT16:
- case elfcpp::R_PPC64_PLTGOT16_LO:
- case elfcpp::R_PPC64_PLTGOT16_HI:
- case elfcpp::R_PPC64_PLTGOT16_HA:
- case elfcpp::R_PPC64_PLTGOT16_DS:
- case elfcpp::R_PPC64_PLTGOT16_LO_DS:
- case elfcpp::R_PPC_TOC16:
- default:
- unsupp:
- gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
- _("unsupported reloc %u"),
- r_type);
- break;
- }
- if (maybe_dq_reloc)
- {
- if (insn == 0)
- insn = elfcpp::Swap<32, big_endian>::readval(iview);
- if ((insn & (0x3f << 26)) == 56u << 26 /* lq */
- || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
- && (insn & 3) == 1))
- status = Reloc::addr16_dq(view, value, overflow);
- else if (size == 64
- || (insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
- || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
- || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
- || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */)
- status = Reloc::addr16_ds(view, value, overflow);
- else
- status = Reloc::addr16(view, value, overflow);
- }
- if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK
- && (has_stub_value
- || !(gsym != NULL
- && gsym->is_undefined()
- && is_branch_reloc<size>(r_type))))
- {
- gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
- _("relocation overflow"));
- if (has_stub_value)
- gold_info(_("try relinking with a smaller --stub-group-size"));
- }
- return true;
- }
- // Relocate section data.
- template<int size, bool big_endian>
- void
- Target_powerpc<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,
- Address address,
- section_size_type view_size,
- const Reloc_symbol_changes* reloc_symbol_changes)
- {
- typedef Target_powerpc<size, big_endian> Powerpc;
- typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
- typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
- Powerpc_comdat_behavior;
- typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- gold_assert(sh_type == elfcpp::SHT_RELA);
- gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate,
- Powerpc_comdat_behavior, Classify_reloc>(
- relinfo,
- this,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- view,
- address,
- view_size,
- reloc_symbol_changes);
- }
- template<int size, bool big_endian>
- class Powerpc_scan_relocatable_reloc
- {
- public:
- typedef typename elfcpp::Rela<size, big_endian> Reltype;
- static const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- static const int sh_type = elfcpp::SHT_RELA;
- // Return the symbol referred to by the relocation.
- static inline unsigned int
- get_r_sym(const Reltype* reloc)
- { return elfcpp::elf_r_sym<size>(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<size>(reloc->get_r_info()); }
- // Return the strategy to use for a local symbol which is not a
- // section symbol, given the relocation type.
- inline Relocatable_relocs::Reloc_strategy
- local_non_section_strategy(unsigned int r_type, Relobj*, unsigned int r_sym)
- {
- if (r_type == 0 && r_sym == 0)
- return Relocatable_relocs::RELOC_DISCARD;
- return Relocatable_relocs::RELOC_COPY;
- }
- // 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, Relobj*)
- {
- return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
- }
- // Return the strategy to use for a global symbol, given the
- // relocation type, the object, and the symbol index.
- inline Relocatable_relocs::Reloc_strategy
- global_strategy(unsigned int r_type, Relobj*, unsigned int)
- {
- if (size == 32
- && (r_type == elfcpp::R_PPC_PLTREL24
- || r_type == elfcpp::R_POWERPC_PLT16_LO
- || r_type == elfcpp::R_POWERPC_PLT16_HI
- || r_type == elfcpp::R_POWERPC_PLT16_HA))
- return Relocatable_relocs::RELOC_SPECIAL;
- return Relocatable_relocs::RELOC_COPY;
- }
- };
- // Scan the relocs during a relocatable link.
- template<int size, bool big_endian>
- void
- Target_powerpc<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)
- {
- typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy;
- gold_assert(sh_type == elfcpp::SHT_RELA);
- gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>(
- symtab,
- layout,
- object,
- data_shndx,
- prelocs,
- reloc_count,
- output_section,
- needs_special_offset_handling,
- local_symbol_count,
- plocal_symbols,
- rr);
- }
- // Scan the relocs for --emit-relocs.
- template<int size, bool big_endian>
- void
- Target_powerpc<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)
- {
- typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
- Classify_reloc;
- typedef gold::Default_emit_relocs_strategy<Classify_reloc>
- Emit_relocs_strategy;
- gold_assert(sh_type == elfcpp::SHT_RELA);
- 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);
- }
- // Emit relocations for a section.
- // This is a modified version of the function by the same name in
- // target-reloc.h. Using relocate_special_relocatable for
- // R_PPC_PLTREL24 would require duplication of the entire body of the
- // loop, so we may as well duplicate the whole thing.
- template<int size, bool big_endian>
- void
- Target_powerpc<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*,
- Address view_address,
- section_size_type,
- unsigned char* reloc_view,
- section_size_type reloc_view_size)
- {
- gold_assert(sh_type == elfcpp::SHT_RELA);
- typedef typename elfcpp::Rela<size, big_endian> Reltype;
- typedef typename elfcpp::Rela_write<size, big_endian> Reltype_write;
- const int reloc_size = elfcpp::Elf_sizes<size>::rela_size;
- // Offset from start of insn to d-field reloc.
- const int d_offset = big_endian ? 2 : 0;
- Powerpc_relobj<size, big_endian>* const object
- = static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
- const unsigned int local_count = object->local_symbol_count();
- unsigned int got2_shndx = object->got2_shndx();
- Address got2_addend = 0;
- if (got2_shndx != 0)
- {
- got2_addend = object->get_output_section_offset(got2_shndx);
- gold_assert(got2_addend != invalid_address);
- }
- const bool relocatable = parameters->options().relocatable();
- unsigned char* pwrite = reloc_view;
- bool zap_next = false;
- for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size)
- {
- Relocatable_relocs::Reloc_strategy strategy = relinfo->rr->strategy(i);
- if (strategy == Relocatable_relocs::RELOC_DISCARD)
- continue;
- Reltype reloc(prelocs);
- Reltype_write reloc_write(pwrite);
- Address offset = reloc.get_r_offset();
- typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info();
- unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
- unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
- const unsigned int orig_r_sym = r_sym;
- typename elfcpp::Elf_types<size>::Elf_Swxword addend
- = reloc.get_r_addend();
- const Symbol* gsym = NULL;
- if (zap_next)
- {
- // We could arrange to discard these and other relocs for
- // tls optimised sequences in the strategy methods, but for
- // now do as BFD ld does.
- r_type = elfcpp::R_POWERPC_NONE;
- zap_next = false;
- }
- // Get the new symbol index.
- Output_section* os = NULL;
- if (r_sym < local_count)
- {
- switch (strategy)
- {
- case Relocatable_relocs::RELOC_COPY:
- case Relocatable_relocs::RELOC_SPECIAL:
- if (r_sym != 0)
- {
- r_sym = object->symtab_index(r_sym);
- gold_assert(r_sym != -1U);
- }
- break;
- case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA:
- {
- // 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.
- gold_assert(r_sym < local_count);
- bool is_ordinary;
- unsigned int shndx =
- object->local_symbol_input_shndx(r_sym, &is_ordinary);
- gold_assert(is_ordinary);
- os = object->output_section(shndx);
- gold_assert(os != NULL);
- gold_assert(os->needs_symtab_index());
- r_sym = os->symtab_index();
- }
- break;
- default:
- gold_unreachable();
- }
- }
- else
- {
- gsym = object->global_symbol(r_sym);
- gold_assert(gsym != NULL);
- if (gsym->is_forwarder())
- gsym = relinfo->symtab->resolve_forwards(gsym);
- gold_assert(gsym->has_symtab_index());
- r_sym = gsym->symtab_index();
- }
- // Get the new offset--the location in the output section where
- // this relocation should be applied.
- if (static_cast<Address>(offset_in_output_section) != invalid_address)
- offset += offset_in_output_section;
- else
- {
- section_offset_type sot_offset =
- convert_types<section_offset_type, Address>(offset);
- section_offset_type new_sot_offset =
- output_section->output_offset(object, relinfo->data_shndx,
- sot_offset);
- gold_assert(new_sot_offset != -1);
- 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 (!relocatable)
- {
- offset += view_address;
- if (static_cast<Address>(offset_in_output_section) != invalid_address)
- offset -= offset_in_output_section;
- }
- // Handle the reloc addend based on the strategy.
- if (strategy == Relocatable_relocs::RELOC_COPY)
- ;
- else if (strategy == Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA)
- {
- const Symbol_value<size>* psymval = object->local_symbol(orig_r_sym);
- addend = psymval->value(object, addend);
- // In a relocatable link, the symbol value is relative to
- // the start of the output section. For a non-relocatable
- // link, we need to adjust the addend.
- if (!relocatable)
- {
- gold_assert(os != NULL);
- addend -= os->address();
- }
- }
- else if (strategy == Relocatable_relocs::RELOC_SPECIAL)
- {
- if (size == 32)
- {
- if (addend >= 32768)
- addend += got2_addend;
- }
- else if (r_type == elfcpp::R_POWERPC_REL16_HA)
- {
- r_type = elfcpp::R_POWERPC_ADDR16_HA;
- addend -= d_offset;
- }
- else if (r_type == elfcpp::R_POWERPC_REL16_LO)
- {
- r_type = elfcpp::R_POWERPC_ADDR16_LO;
- addend -= d_offset + 4;
- }
- }
- else
- gold_unreachable();
- if (!relocatable)
- {
- if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HI
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_HA)
- {
- // First instruction of a global dynamic sequence,
- // arg setup insn.
- bool final = gsym == NULL || gsym->final_value_is_known();
- tls::Tls_optimization tls_type = this->optimize_tls_gd(final);
- switch (tls_type)
- {
- case tls::TLSOPT_TO_IE:
- r_type += (elfcpp::R_POWERPC_GOT_TPREL16
- - elfcpp::R_POWERPC_GOT_TLSGD16);
- break;
- case tls::TLSOPT_TO_LE:
- if (r_type == elfcpp::R_POWERPC_GOT_TLSGD16
- || r_type == elfcpp::R_POWERPC_GOT_TLSGD16_LO)
- r_type = elfcpp::R_POWERPC_TPREL16_HA;
- else
- {
- r_type = elfcpp::R_POWERPC_NONE;
- offset -= d_offset;
- }
- break;
- default:
- break;
- }
- }
- else if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
- || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO
- || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HI
- || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_HA)
- {
- // First instruction of a local dynamic sequence,
- // arg setup insn.
- tls::Tls_optimization tls_type = this->optimize_tls_ld();
- if (tls_type == tls::TLSOPT_TO_LE)
- {
- if (r_type == elfcpp::R_POWERPC_GOT_TLSLD16
- || r_type == elfcpp::R_POWERPC_GOT_TLSLD16_LO)
- {
- r_type = elfcpp::R_POWERPC_TPREL16_HA;
- const Output_section* os = relinfo->layout->tls_segment()
- ->first_section();
- gold_assert(os != NULL);
- gold_assert(os->needs_symtab_index());
- r_sym = os->symtab_index();
- addend = dtp_offset;
- }
- else
- {
- r_type = elfcpp::R_POWERPC_NONE;
- offset -= d_offset;
- }
- }
- }
- else if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HI
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16_HA)
- {
- // First instruction of initial exec sequence.
- bool final = gsym == NULL || gsym->final_value_is_known();
- if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
- {
- if (r_type == elfcpp::R_POWERPC_GOT_TPREL16
- || r_type == elfcpp::R_POWERPC_GOT_TPREL16_LO)
- r_type = elfcpp::R_POWERPC_TPREL16_HA;
- else
- {
- r_type = elfcpp::R_POWERPC_NONE;
- offset -= d_offset;
- }
- }
- }
- else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSGD)
- || (size == 32 && r_type == elfcpp::R_PPC_TLSGD))
- {
- // Second instruction of a global dynamic sequence,
- // the __tls_get_addr call
- bool final = gsym == NULL || gsym->final_value_is_known();
- tls::Tls_optimization tls_type = this->optimize_tls_gd(final);
- switch (tls_type)
- {
- case tls::TLSOPT_TO_IE:
- r_type = elfcpp::R_POWERPC_NONE;
- zap_next = true;
- break;
- case tls::TLSOPT_TO_LE:
- r_type = elfcpp::R_POWERPC_TPREL16_LO;
- offset += d_offset;
- zap_next = true;
- break;
- default:
- break;
- }
- }
- else if ((size == 64 && r_type == elfcpp::R_PPC64_TLSLD)
- || (size == 32 && r_type == elfcpp::R_PPC_TLSLD))
- {
- // Second instruction of a local dynamic sequence,
- // the __tls_get_addr call
- tls::Tls_optimization tls_type = this->optimize_tls_ld();
- if (tls_type == tls::TLSOPT_TO_LE)
- {
- const Output_section* os = relinfo->layout->tls_segment()
- ->first_section();
- gold_assert(os != NULL);
- gold_assert(os->needs_symtab_index());
- r_sym = os->symtab_index();
- addend = dtp_offset;
- r_type = elfcpp::R_POWERPC_TPREL16_LO;
- offset += d_offset;
- zap_next = true;
- }
- }
- else if (r_type == elfcpp::R_POWERPC_TLS)
- {
- // Second instruction of an initial exec sequence
- bool final = gsym == NULL || gsym->final_value_is_known();
- if (this->optimize_tls_ie(final) == tls::TLSOPT_TO_LE)
- {
- r_type = elfcpp::R_POWERPC_TPREL16_LO;
- offset += d_offset;
- }
- }
- }
- reloc_write.put_r_offset(offset);
- reloc_write.put_r_info(elfcpp::elf_r_info<size>(r_sym, r_type));
- reloc_write.put_r_addend(addend);
- pwrite += reloc_size;
- }
- gold_assert(static_cast<section_size_type>(pwrite - reloc_view)
- == reloc_view_size);
- }
- // 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_powerpc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
- {
- if (size == 32)
- {
- gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
- for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- {
- const typename Stub_table<size, big_endian>::Plt_stub_ent* ent
- = (*p)->find_plt_call_entry(gsym);
- if (ent != NULL)
- return (*p)->stub_address() + ent->off_;
- }
- }
- else if (this->abiversion() >= 2)
- {
- Address off = this->glink_section()->find_global_entry(gsym);
- if (off != invalid_address)
- return this->glink_section()->global_entry_address() + off;
- }
- gold_unreachable();
- }
- // Return the PLT address to use for a local symbol.
- template<int size, bool big_endian>
- uint64_t
- Target_powerpc<size, big_endian>::do_plt_address_for_local(
- const Relobj* object,
- unsigned int symndx) const
- {
- if (size == 32)
- {
- const Sized_relobj<size, big_endian>* relobj
- = static_cast<const Sized_relobj<size, big_endian>*>(object);
- for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- {
- const typename Stub_table<size, big_endian>::Plt_stub_ent* ent
- = (*p)->find_plt_call_entry(relobj->sized_relobj(), symndx);
- if (ent != NULL)
- return (*p)->stub_address() + ent->off_;
- }
- }
- gold_unreachable();
- }
- // Return the PLT address to use for a global symbol.
- template<int size, bool big_endian>
- uint64_t
- Target_powerpc<size, big_endian>::do_plt_address_for_global(
- const Symbol* gsym) const
- {
- if (size == 32)
- {
- for (typename Stub_tables::const_iterator p = this->stub_tables_.begin();
- p != this->stub_tables_.end();
- ++p)
- {
- const typename Stub_table<size, big_endian>::Plt_stub_ent* ent
- = (*p)->find_plt_call_entry(gsym);
- if (ent != NULL)
- return (*p)->stub_address() + ent->off_;
- }
- }
- else if (this->abiversion() >= 2)
- {
- Address off = this->glink_section()->find_global_entry(gsym);
- if (off != invalid_address)
- return this->glink_section()->global_entry_address() + off;
- }
- gold_unreachable();
- }
- // Return the offset to use for the GOT_INDX'th got entry which is
- // for a local tls symbol specified by OBJECT, SYMNDX.
- template<int size, bool big_endian>
- int64_t
- Target_powerpc<size, big_endian>::do_tls_offset_for_local(
- const Relobj* object,
- unsigned int symndx,
- Output_data_got_base* got,
- unsigned int got_indx,
- uint64_t addend) const
- {
- const Powerpc_relobj<size, big_endian>* ppc_object
- = static_cast<const Powerpc_relobj<size, big_endian>*>(object);
- if (ppc_object->local_symbol(symndx)->is_tls_symbol())
- {
- for (Got_type got_type = (size == 32
- ? GOT_TYPE_SMALL_TLSGD : GOT_TYPE_TLSGD);
- got_type <= GOT_TYPE_SMALL_TPREL;
- got_type = Got_type(got_type + 1))
- if (got_type != GOT_TYPE_SMALL
- && ppc_object->local_has_got_offset(symndx, got_type, addend))
- {
- unsigned int off
- = ppc_object->local_got_offset(symndx, got_type, addend);
- if ((got_type & ~GOT_TYPE_SMALL) == GOT_TYPE_TLSGD)
- off += size / 8;
- if (off == got_indx * (size / 8)
- && (size == 32 || got == this->got_section(got_type)))
- {
- if ((got_type & ~GOT_TYPE_SMALL) == GOT_TYPE_TPREL)
- return -tp_offset;
- else
- return -dtp_offset;
- }
- }
- }
- gold_unreachable();
- }
- // Return the offset to use for the GOT_INDX'th got entry which is
- // for global tls symbol GSYM.
- template<int size, bool big_endian>
- int64_t
- Target_powerpc<size, big_endian>::do_tls_offset_for_global(
- Symbol* gsym,
- Output_data_got_base* got,
- unsigned int got_indx,
- uint64_t addend) const
- {
- if (gsym->type() == elfcpp::STT_TLS)
- {
- for (Got_type got_type = (size == 32
- ? GOT_TYPE_SMALL_TLSGD : GOT_TYPE_TLSGD);
- got_type <= GOT_TYPE_SMALL_TPREL;
- got_type = Got_type(got_type + 1))
- if (got_type != GOT_TYPE_SMALL
- && gsym->has_got_offset(got_type, addend))
- {
- unsigned int off = gsym->got_offset(got_type, addend);
- if ((got_type & ~GOT_TYPE_SMALL) == GOT_TYPE_TLSGD)
- off += size / 8;
- if (off == got_indx * (size / 8)
- && (size == 32 || got == this->got_section(got_type)))
- {
- if ((got_type & ~GOT_TYPE_SMALL) == GOT_TYPE_TPREL)
- return -tp_offset;
- else
- return -dtp_offset;
- }
- }
- }
- gold_unreachable();
- }
- // The selector for powerpc object files.
- template<int size, bool big_endian>
- class Target_selector_powerpc : public Target_selector
- {
- public:
- Target_selector_powerpc()
- : Target_selector(size == 64 ? elfcpp::EM_PPC64 : elfcpp::EM_PPC,
- size, big_endian,
- (size == 64
- ? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
- : (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
- (size == 64
- ? (big_endian ? "elf64ppc" : "elf64lppc")
- : (big_endian ? "elf32ppc" : "elf32lppc")))
- { }
- virtual Target*
- do_instantiate_target()
- { return new Target_powerpc<size, big_endian>(); }
- };
- Target_selector_powerpc<32, true> target_selector_ppc32;
- Target_selector_powerpc<32, false> target_selector_ppc32le;
- Target_selector_powerpc<64, true> target_selector_ppc64;
- Target_selector_powerpc<64, false> target_selector_ppc64le;
- // Instantiate these constants for -O0
- template<int size, bool big_endian>
- const typename Output_data_glink<size, big_endian>::Address
- Output_data_glink<size, big_endian>::invalid_address;
- template<int size, bool big_endian>
- const typename Stub_table<size, big_endian>::Address
- Stub_table<size, big_endian>::invalid_address;
- template<int size, bool big_endian>
- const typename Target_powerpc<size, big_endian>::Address
- Target_powerpc<size, big_endian>::invalid_address;
- } // End anonymous namespace.
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