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- /* BFD back-end data structures for ELF files.
- Copyright (C) 1992-2022 Free Software Foundation, Inc.
- Written by Cygnus Support.
- This file is part of BFD, the Binary File Descriptor library.
- 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. */
- #ifndef _LIBELF_H_
- #define _LIBELF_H_ 1
- #include <stdlib.h>
- #include "elf/common.h"
- #include "elf/external.h"
- #include "elf/internal.h"
- #include "bfdlink.h"
- #ifndef ENABLE_CHECKING
- #define ENABLE_CHECKING 0
- #endif
- #ifdef __cplusplus
- extern "C" {
- #endif
- /* The number of entries in a section is its size divided by the size
- of a single entry. This is normally only applicable to reloc and
- symbol table sections.
- PR 9934: It is possible to have relocations that do not refer to
- symbols, thus it is also possible to have a relocation section in
- an object file, but no symbol table. */
- #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
- /* If size isn't specified as 64 or 32, NAME macro should fail. */
- #ifndef NAME
- #if ARCH_SIZE == 64
- #define NAME(x, y) x ## 64 ## _ ## y
- #endif
- #if ARCH_SIZE == 32
- #define NAME(x, y) x ## 32 ## _ ## y
- #endif
- #endif
- #ifndef NAME
- #define NAME(x, y) x ## NOSIZE ## _ ## y
- #endif
- #define ElfNAME(X) NAME(Elf,X)
- #define elfNAME(X) NAME(elf,X)
- /* Information held for an ELF symbol. The first field is the
- corresponding asymbol. Every symbol is an ELF file is actually a
- pointer to this structure, although it is often handled as a
- pointer to an asymbol. */
- typedef struct
- {
- /* The BFD symbol. */
- asymbol symbol;
- /* ELF symbol information. */
- Elf_Internal_Sym internal_elf_sym;
- /* Backend specific information. */
- union
- {
- unsigned int hppa_arg_reloc;
- void *mips_extr;
- void *any;
- }
- tc_data;
- /* Version information. This is from an Elf_Internal_Versym
- structure in a SHT_GNU_versym section. It is zero if there is no
- version information. */
- unsigned short version;
- } elf_symbol_type;
- struct elf_strtab_hash;
- struct got_entry;
- struct plt_entry;
- union gotplt_union
- {
- bfd_signed_vma refcount;
- bfd_vma offset;
- struct got_entry *glist;
- struct plt_entry *plist;
- };
- struct elf_link_virtual_table_entry
- {
- /* Virtual table entry use information. This array is nominally of size
- size/sizeof(target_void_pointer), though we have to be able to assume
- and track a size while the symbol is still undefined. It is indexed
- via offset/sizeof(target_void_pointer). */
- size_t size;
- bool *used;
- /* Virtual table derivation info. */
- struct elf_link_hash_entry *parent;
- };
- /* ELF symbol version. */
- enum elf_symbol_version
- {
- unknown = 0,
- unversioned,
- versioned,
- versioned_hidden
- };
- /* ELF linker hash table entries. */
- struct elf_link_hash_entry
- {
- struct bfd_link_hash_entry root;
- /* Symbol index in output file. This is initialized to -1. It is
- set to -2 if the symbol is used by a reloc. It is set to -3 if
- this symbol is defined in a discarded section. */
- long indx;
- /* Symbol index as a dynamic symbol. Initialized to -1, and remains
- -1 if this is not a dynamic symbol. */
- /* ??? Note that this is consistently used as a synonym for tests
- against whether we can perform various simplifying transformations
- to the code. (E.g. changing a pc-relative jump to a PLT entry
- into a pc-relative jump to the target function.) That test, which
- is often relatively complex, and someplaces wrong or incomplete,
- should really be replaced by a predicate in elflink.c.
- End result: this field -1 does not indicate that the symbol is
- not in the dynamic symbol table, but rather that the symbol is
- not visible outside this DSO. */
- long dynindx;
- /* If this symbol requires an entry in the global offset table, the
- processor specific backend uses this field to track usage and
- final offset. Two schemes are supported: The first assumes that
- a symbol may only have one GOT entry, and uses REFCOUNT until
- size_dynamic_sections, at which point the contents of the .got is
- fixed. Afterward, if OFFSET is -1, then the symbol does not
- require a global offset table entry. The second scheme allows
- multiple GOT entries per symbol, managed via a linked list
- pointed to by GLIST. */
- union gotplt_union got;
- /* Same, but tracks a procedure linkage table entry. */
- union gotplt_union plt;
- /* Symbol size. NB: All fields starting from here are cleared by
- _bfd_elf_link_hash_newfunc. */
- bfd_size_type size;
- /* Track dynamic relocs copied for this symbol. */
- struct elf_dyn_relocs *dyn_relocs;
- /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
- unsigned int type : 8;
- /* Symbol st_other value, symbol visibility. */
- unsigned int other : 8;
- /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
- unsigned int target_internal : 8;
- /* Symbol is referenced by a non-shared object (other than the object
- in which it is defined). */
- unsigned int ref_regular : 1;
- /* Symbol is defined by a non-shared object. */
- unsigned int def_regular : 1;
- /* Symbol is referenced by a shared object. */
- unsigned int ref_dynamic : 1;
- /* Symbol is defined by a shared object. */
- unsigned int def_dynamic : 1;
- /* Symbol has a non-weak reference from a non-shared object (other than
- the object in which it is defined). */
- unsigned int ref_regular_nonweak : 1;
- /* Symbol has a non-weak reference from a LTO IR object file. */
- unsigned int ref_ir_nonweak : 1;
- /* Dynamic symbol has been adjustd. */
- unsigned int dynamic_adjusted : 1;
- /* Symbol needs a copy reloc. */
- unsigned int needs_copy : 1;
- /* Symbol needs a procedure linkage table entry. */
- unsigned int needs_plt : 1;
- /* Symbol appears in a non-ELF input file. */
- unsigned int non_elf : 1;
- /* Symbol version information. */
- ENUM_BITFIELD (elf_symbol_version) versioned : 2;
- /* Symbol was forced to local scope due to a version script file. */
- unsigned int forced_local : 1;
- /* Symbol was forced to be dynamic due to a version script file. */
- unsigned int dynamic : 1;
- /* Symbol was marked during garbage collection. */
- unsigned int mark : 1;
- /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
- not currently set by all the backends. */
- unsigned int non_got_ref : 1;
- /* Symbol has a definition in a shared object.
- FIXME: There is no real need for this field if def_dynamic is never
- cleared and all places that test def_dynamic also test def_regular. */
- unsigned int dynamic_def : 1;
- /* Symbol has a non-weak reference from a shared object. */
- unsigned int ref_dynamic_nonweak : 1;
- /* Symbol is referenced with a relocation where C/C++ pointer equality
- matters. */
- unsigned int pointer_equality_needed : 1;
- /* Symbol is a unique global symbol. */
- unsigned int unique_global : 1;
- /* Symbol is defined by a shared library with non-default visibility
- in a read/write section. */
- unsigned int protected_def : 1;
- /* Symbol is __start_SECNAME or __stop_SECNAME to mark section
- SECNAME. */
- unsigned int start_stop : 1;
- /* Symbol is or was a weak defined symbol from a dynamic object with
- a strong defined symbol alias. U.ALIAS points to a list of aliases,
- the definition having is_weakalias clear. */
- unsigned int is_weakalias : 1;
- /* String table index in .dynstr if this is a dynamic symbol. */
- unsigned long dynstr_index;
- union
- {
- /* Points to a circular list of non-function symbol aliases. */
- struct elf_link_hash_entry *alias;
- /* Hash value of the name computed using the ELF hash function.
- Used part way through size_dynamic_sections, after we've finished
- with aliases. */
- unsigned long elf_hash_value;
- } u;
- /* Version information. */
- union
- {
- /* This field is used for a symbol which is not defined in a
- regular object. It points to the version information read in
- from the dynamic object. */
- Elf_Internal_Verdef *verdef;
- /* This field is used for a symbol which is defined in a regular
- object. It is set up in size_dynamic_sections. It points to
- the version information we should write out for this symbol. */
- struct bfd_elf_version_tree *vertree;
- } verinfo;
- union
- {
- /* For __start_SECNAME and __stop_SECNAME symbols, record the first
- input section whose section name is SECNAME. */
- asection *start_stop_section;
- /* Vtable information. */
- struct elf_link_virtual_table_entry *vtable;
- } u2;
- };
- /* Return the strong definition for a weak symbol with aliases. */
- static inline struct elf_link_hash_entry *
- weakdef (struct elf_link_hash_entry *h)
- {
- while (h->is_weakalias)
- h = h->u.alias;
- return h;
- }
- /* Will references to this symbol always reference the symbol
- in this object? */
- #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
- _bfd_elf_symbol_refs_local_p (H, INFO, 0)
- /* Will _calls_ to this symbol always call the version in this object? */
- #define SYMBOL_CALLS_LOCAL(INFO, H) \
- _bfd_elf_symbol_refs_local_p (H, INFO, 1)
- /* Whether an undefined weak symbol should resolve to its link-time
- value, even in PIC or PIE objects. The linker_def test is to
- handle symbols like __ehdr_start that may be undefweak in early
- stages of linking but are guaranteed to be defined later. */
- #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
- ((H)->root.type == bfd_link_hash_undefweak \
- && !(H)->root.linker_def \
- && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
- || (INFO)->dynamic_undefined_weak == 0))
- /* Common symbols that are turned into definitions don't have the
- DEF_REGULAR flag set, so they might appear to be undefined.
- Symbols defined in linker scripts also don't have DEF_REGULAR set. */
- #define ELF_COMMON_DEF_P(H) \
- (!(H)->def_regular \
- && !(H)->def_dynamic \
- && (H)->root.type == bfd_link_hash_defined)
- /* Records local symbols to be emitted in the dynamic symbol table. */
- struct elf_link_local_dynamic_entry
- {
- struct elf_link_local_dynamic_entry *next;
- /* The input bfd this symbol came from. */
- bfd *input_bfd;
- /* The index of the local symbol being copied. */
- long input_indx;
- /* The index in the outgoing dynamic symbol table. */
- long dynindx;
- /* A copy of the input symbol. */
- Elf_Internal_Sym isym;
- };
- struct elf_link_loaded_list
- {
- struct elf_link_loaded_list *next;
- bfd *abfd;
- };
- /* Structures used by the eh_frame optimization code. */
- struct eh_cie_fde
- {
- union {
- struct {
- /* If REMOVED == 1, this is the CIE that the FDE originally used.
- The CIE belongs to the same .eh_frame input section as the FDE.
- If REMOVED == 0, this is the CIE that we have chosen to use for
- the output FDE. The CIE's REMOVED field is also 0, but the CIE
- might belong to a different .eh_frame input section from the FDE.
- May be NULL to signify that the FDE should be discarded. */
- struct eh_cie_fde *cie_inf;
- struct eh_cie_fde *next_for_section;
- } fde;
- struct {
- /* CIEs have three states:
- - REMOVED && !MERGED: Slated for removal because we haven't yet
- proven that an FDE needs it. FULL_CIE, if nonnull, points to
- more detailed information about the CIE.
- - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
- which may not belong to the same input section.
- - !REMOVED: We have decided to keep this CIE. SEC is the
- .eh_frame input section that contains the CIE. */
- union {
- struct cie *full_cie;
- struct eh_cie_fde *merged_with;
- asection *sec;
- } u;
- /* The offset of the personality data from the start of the CIE,
- or 0 if the CIE doesn't have any. */
- unsigned int personality_offset : 8;
- /* Length of augmentation. aug_str_len is the length of the
- string including null terminator. aug_data_len is the length
- of the rest up to the initial insns. */
- unsigned int aug_str_len : 3;
- unsigned int aug_data_len : 5;
- /* True if we have marked relocations associated with this CIE. */
- unsigned int gc_mark : 1;
- /* True if we have decided to turn an absolute LSDA encoding into
- a PC-relative one. */
- unsigned int make_lsda_relative : 1;
- /* True if we have decided to turn an absolute personality
- encoding into a PC-relative one. */
- unsigned int make_per_encoding_relative : 1;
- /* True if the CIE contains personality data and if that
- data uses a PC-relative encoding. Always true when
- make_per_encoding_relative is. */
- unsigned int per_encoding_relative : 1;
- /* True if the CIE contains personality data aligned to a
- multiple of eight bytes. */
- unsigned int per_encoding_aligned8 : 1;
- /* True if we need to add an 'R' (FDE encoding) entry to the
- CIE's augmentation data. */
- unsigned int add_fde_encoding : 1;
- /* True if we have merged this CIE with another. */
- unsigned int merged : 1;
- /* Unused bits. */
- unsigned int pad1 : 9;
- } cie;
- } u;
- unsigned int reloc_index;
- unsigned int size;
- unsigned int offset;
- unsigned int new_offset;
- unsigned int fde_encoding : 8;
- unsigned int lsda_encoding : 8;
- unsigned int lsda_offset : 8;
- /* True if this entry represents a CIE, false if it represents an FDE. */
- unsigned int cie : 1;
- /* True if this entry is currently marked for removal. */
- unsigned int removed : 1;
- /* True if we need to add a 'z' (augmentation size) entry to the CIE's
- augmentation data, and an associated byte to each of the CIE's FDEs. */
- unsigned int add_augmentation_size : 1;
- /* True if we have decided to convert absolute FDE relocations into
- relative ones. This applies to the first relocation in the FDE,
- which is against the code that the FDE describes. */
- unsigned int make_relative : 1;
- /* Unused bits. */
- unsigned int pad1 : 4;
- unsigned int *set_loc;
- };
- struct eh_frame_sec_info
- {
- unsigned int count;
- struct cie *cies;
- struct eh_cie_fde entry[1];
- };
- struct eh_frame_array_ent
- {
- bfd_vma initial_loc;
- bfd_size_type range;
- bfd_vma fde;
- };
- struct htab;
- #define DWARF2_EH_HDR 1
- #define COMPACT_EH_HDR 2
- /* Endian-neutral code indicating that a function cannot be unwound. */
- #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
- struct dwarf_eh_frame_hdr_info
- {
- struct htab *cies;
- unsigned int fde_count;
- /* TRUE if .eh_frame_hdr should contain the sorted search table.
- We build it if we successfully read all .eh_frame input sections
- and recognize them. */
- bool table;
- struct eh_frame_array_ent *array;
- };
- struct compact_eh_frame_hdr_info
- {
- unsigned int allocated_entries;
- /* eh_frame_entry fragments. */
- asection **entries;
- };
- struct eh_frame_hdr_info
- {
- asection *hdr_sec;
- unsigned int array_count;
- bool frame_hdr_is_compact;
- union
- {
- struct dwarf_eh_frame_hdr_info dwarf;
- struct compact_eh_frame_hdr_info compact;
- }
- u;
- };
- /* Enum used to identify target specific extensions to the elf_obj_tdata
- and elf_link_hash_table structures. Note the enums deliberately start
- from 1 so that we can detect an uninitialized field. The generic value
- is last so that additions to this enum do not need to modify more than
- one line. */
- enum elf_target_id
- {
- AARCH64_ELF_DATA = 1,
- ALPHA_ELF_DATA,
- AMDGCN_ELF_DATA,
- ARC_ELF_DATA,
- ARM_ELF_DATA,
- AVR_ELF_DATA,
- BFIN_ELF_DATA,
- CRIS_ELF_DATA,
- CSKY_ELF_DATA,
- FRV_ELF_DATA,
- HPPA32_ELF_DATA,
- HPPA64_ELF_DATA,
- I386_ELF_DATA,
- IA64_ELF_DATA,
- LM32_ELF_DATA,
- LARCH_ELF_DATA,
- M32R_ELF_DATA,
- M68HC11_ELF_DATA,
- M68K_ELF_DATA,
- METAG_ELF_DATA,
- MICROBLAZE_ELF_DATA,
- MIPS_ELF_DATA,
- MN10300_ELF_DATA,
- NDS32_ELF_DATA,
- NIOS2_ELF_DATA,
- OR1K_ELF_DATA,
- PPC32_ELF_DATA,
- PPC64_ELF_DATA,
- PRU_ELF_DATA,
- S390_ELF_DATA,
- SH_ELF_DATA,
- SPARC_ELF_DATA,
- SPU_ELF_DATA,
- TIC6X_ELF_DATA,
- X86_64_ELF_DATA,
- XTENSA_ELF_DATA,
- TILEGX_ELF_DATA,
- TILEPRO_ELF_DATA,
- RISCV_ELF_DATA,
- GENERIC_ELF_DATA
- };
- struct elf_sym_strtab
- {
- Elf_Internal_Sym sym;
- unsigned long dest_index;
- };
- struct bfd_link_needed_list
- {
- struct bfd_link_needed_list *next;
- bfd *by;
- const char *name;
- };
- enum elf_target_os
- {
- is_normal,
- is_solaris, /* Solaris. */
- is_vxworks, /* VxWorks. */
- is_nacl /* Native Client. */
- };
- /* Used by bfd_sym_from_r_symndx to cache a small number of local
- symbols. */
- #define LOCAL_SYM_CACHE_SIZE 32
- struct sym_cache
- {
- bfd *abfd;
- unsigned long indx[LOCAL_SYM_CACHE_SIZE];
- Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE];
- };
- /* ELF linker hash table. */
- struct elf_link_hash_table
- {
- struct bfd_link_hash_table root;
- /* An identifier used to distinguish different target
- specific extensions to this structure. */
- enum elf_target_id hash_table_id;
- /* Whether we have created the special dynamic sections required
- when linking against or generating a shared object. */
- bool dynamic_sections_created;
- /* Whether dynamic relocations are present. */
- bool dynamic_relocs;
- /* True if this target has relocatable executables, so needs dynamic
- section symbols. */
- bool is_relocatable_executable;
- /* TRUE if there are IFUNC resolvers. */
- bool ifunc_resolvers;
- /* TRUE if DT_PLTGOT is a required dynamic tag. */
- bool dt_pltgot_required;
- /* TRUE if DT_JMPREL is a required dynamic tag. */
- bool dt_jmprel_required;
- /* TRUE when we are handling DT_NEEDED entries. */
- bool handling_dt_needed;
- /* The BFD used to hold special sections created by the linker.
- This will be the first BFD found which requires these sections to
- be created. */
- bfd *dynobj;
- /* The value to use when initialising got.refcount/offset and
- plt.refcount/offset in an elf_link_hash_entry. Set to zero when
- the values are refcounts. Set to init_got_offset/init_plt_offset
- in size_dynamic_sections when the values may be offsets. */
- union gotplt_union init_got_refcount;
- union gotplt_union init_plt_refcount;
- /* The value to use for got.refcount/offset and plt.refcount/offset
- when the values may be offsets. Normally (bfd_vma) -1. */
- union gotplt_union init_got_offset;
- union gotplt_union init_plt_offset;
- /* The number of symbols found in the link which is intended for the
- mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
- bfd_size_type dynsymcount;
- bfd_size_type local_dynsymcount;
- /* The string table of dynamic symbols, which becomes the .dynstr
- section. */
- struct elf_strtab_hash *dynstr;
- /* The array size of the symbol string table, which becomes the
- .strtab section. */
- bfd_size_type strtabsize;
- /* The array of strings, which becomes the .strtab section. */
- struct elf_sym_strtab *strtab;
- /* The number of buckets in the hash table in the .hash section.
- This is based on the number of dynamic symbols. */
- bfd_size_type bucketcount;
- /* A linked list of DT_NEEDED names found in dynamic objects
- included in the link. */
- struct bfd_link_needed_list *needed;
- /* Sections in the output bfd that provides a section symbol
- to be used by relocations emitted against local symbols.
- Most targets will not use data_index_section. */
- asection *text_index_section;
- asection *data_index_section;
- /* The _GLOBAL_OFFSET_TABLE_ symbol. */
- struct elf_link_hash_entry *hgot;
- /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
- struct elf_link_hash_entry *hplt;
- /* The _DYNAMIC symbol. */
- struct elf_link_hash_entry *hdynamic;
- /* A pointer to information used to merge SEC_MERGE sections. */
- void *merge_info;
- /* Used to link stabs in sections. */
- struct stab_info stab_info;
- /* Used by eh_frame code when editing .eh_frame. */
- struct eh_frame_hdr_info eh_info;
- /* A linked list of local symbols to be added to .dynsym. */
- struct elf_link_local_dynamic_entry *dynlocal;
- /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
- objects included in the link. */
- struct bfd_link_needed_list *runpath;
- /* Cached first output tls section and size of PT_TLS segment. */
- asection *tls_sec;
- bfd_size_type tls_size; /* Bytes. */
- /* The offset into splt of the PLT entry for the TLS descriptor
- resolver. Special values are 0, if not necessary (or not found
- to be necessary yet), and -1 if needed but not determined
- yet. */
- bfd_vma tlsdesc_plt;
- /* The GOT offset for the lazy trampoline. Communicated to the
- loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
- indicates an offset is not allocated. */
- bfd_vma tlsdesc_got;
- /* Target OS for linker output. */
- enum elf_target_os target_os;
- /* A linked list of dynamic BFD's loaded in the link. */
- struct elf_link_loaded_list *dyn_loaded;
- /* Small local sym cache. */
- struct sym_cache sym_cache;
- /* Short-cuts to get to dynamic linker sections. */
- asection *sgot;
- asection *sgotplt;
- asection *srelgot;
- asection *splt;
- asection *srelplt;
- asection *sdynbss;
- asection *srelbss;
- asection *sdynrelro;
- asection *sreldynrelro;
- asection *igotplt;
- asection *iplt;
- asection *irelplt;
- asection *irelifunc;
- asection *dynsym;
- asection *srelrdyn;
- };
- /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
- static inline bool
- is_elf_hash_table (const struct bfd_link_hash_table *htab)
- {
- return htab->type == bfd_link_elf_hash_table;
- }
- /* Look up an entry in an ELF linker hash table. */
- static inline struct elf_link_hash_entry *
- elf_link_hash_lookup (struct elf_link_hash_table *table, const char *string,
- bool create, bool copy, bool follow)
- {
- if (ENABLE_CHECKING && !is_elf_hash_table (&table->root))
- abort ();
- return (struct elf_link_hash_entry *)
- bfd_link_hash_lookup (&table->root, string, create, copy, follow);
- }
- /* Traverse an ELF linker hash table. */
- static inline void
- elf_link_hash_traverse (struct elf_link_hash_table *table,
- bool (*f) (struct elf_link_hash_entry *, void *),
- void *info)
- {
- if (ENABLE_CHECKING && !is_elf_hash_table (&table->root))
- abort ();
- bfd_link_hash_traverse (&table->root,
- (bool (*) (struct bfd_link_hash_entry *, void *)) f,
- info);
- }
- /* Get the ELF linker hash table from a link_info structure. */
- static inline struct elf_link_hash_table *
- elf_hash_table (const struct bfd_link_info *info)
- {
- return (struct elf_link_hash_table *) info->hash;
- }
- static inline enum elf_target_id
- elf_hash_table_id (const struct elf_link_hash_table *table)
- {
- return table->hash_table_id;
- }
- /* Constant information held for an ELF backend. */
- struct elf_size_info {
- unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
- unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
- /* The size of entries in the .hash section. */
- unsigned char sizeof_hash_entry;
- /* The number of internal relocations to allocate per external
- relocation entry. */
- unsigned char int_rels_per_ext_rel;
- /* We use some fixed size arrays. This should be large enough to
- handle all back-ends. */
- #define MAX_INT_RELS_PER_EXT_REL 3
- unsigned char arch_size, log_file_align;
- unsigned char elfclass, ev_current;
- int (*write_out_phdrs)
- (bfd *, const Elf_Internal_Phdr *, unsigned int);
- bool (*write_shdrs_and_ehdr) (bfd *);
- bool (*checksum_contents)
- (bfd * , void (*) (const void *, size_t, void *), void *);
- void (*write_relocs)
- (bfd *, asection *, void *);
- bool (*swap_symbol_in)
- (bfd *, const void *, const void *, Elf_Internal_Sym *);
- void (*swap_symbol_out)
- (bfd *, const Elf_Internal_Sym *, void *, void *);
- bool (*slurp_reloc_table)
- (bfd *, asection *, asymbol **, bool);
- long (*slurp_symbol_table)
- (bfd *, asymbol **, bool);
- void (*swap_dyn_in)
- (bfd *, const void *, Elf_Internal_Dyn *);
- void (*swap_dyn_out)
- (bfd *, const Elf_Internal_Dyn *, void *);
- /* This function is called to swap in a REL relocation. If an
- external relocation corresponds to more than one internal
- relocation, then all relocations are swapped in at once. */
- void (*swap_reloc_in)
- (bfd *, const bfd_byte *, Elf_Internal_Rela *);
- /* This function is called to swap out a REL relocation. */
- void (*swap_reloc_out)
- (bfd *, const Elf_Internal_Rela *, bfd_byte *);
- /* This function is called to swap in a RELA relocation. If an
- external relocation corresponds to more than one internal
- relocation, then all relocations are swapped in at once. */
- void (*swap_reloca_in)
- (bfd *, const bfd_byte *, Elf_Internal_Rela *);
- /* This function is called to swap out a RELA relocation. */
- void (*swap_reloca_out)
- (bfd *, const Elf_Internal_Rela *, bfd_byte *);
- };
- #define elf_symbol_from(S) \
- ((((S)->flags & BSF_SYNTHETIC) == 0 \
- && (S)->the_bfd != NULL \
- && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
- && (S)->the_bfd->tdata.elf_obj_data != 0) \
- ? (elf_symbol_type *) (S) \
- : 0)
- enum elf_reloc_type_class {
- reloc_class_normal,
- reloc_class_relative,
- reloc_class_copy,
- reloc_class_ifunc,
- reloc_class_plt
- };
- struct elf_reloc_cookie
- {
- Elf_Internal_Rela *rels, *rel, *relend;
- Elf_Internal_Sym *locsyms;
- bfd *abfd;
- size_t locsymcount;
- size_t extsymoff;
- struct elf_link_hash_entry **sym_hashes;
- int r_sym_shift;
- bool bad_symtab;
- };
- /* The level of IRIX compatibility we're striving for. */
- typedef enum {
- ict_none,
- ict_irix5,
- ict_irix6
- } irix_compat_t;
- /* Mapping of ELF section names and types. */
- struct bfd_elf_special_section
- {
- const char *prefix;
- unsigned int prefix_length;
- /* 0 means name must match PREFIX exactly.
- -1 means name must start with PREFIX followed by an arbitrary string.
- -2 means name must match PREFIX exactly or consist of PREFIX followed
- by a dot then anything.
- > 0 means name must start with the first PREFIX_LENGTH chars of
- PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
- signed int suffix_length;
- unsigned int type;
- bfd_vma attr;
- };
- enum action_discarded
- {
- COMPLAIN = 1,
- PRETEND = 2
- };
- typedef asection * (*elf_gc_mark_hook_fn)
- (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *);
- enum elf_property_kind
- {
- /* A new property. */
- property_unknown = 0,
- /* A property ignored by backend. */
- property_ignored,
- /* A corrupt property reported by backend. */
- property_corrupt,
- /* A property should be removed due to property merge. */
- property_remove,
- /* A property which is a number. */
- property_number
- };
- typedef struct elf_property
- {
- unsigned int pr_type;
- unsigned int pr_datasz;
- union
- {
- /* For property_number, this is a number. */
- bfd_vma number;
- /* Add a new one if elf_property_kind is updated. */
- } u;
- enum elf_property_kind pr_kind;
- } elf_property;
- typedef struct elf_property_list
- {
- struct elf_property_list *next;
- struct elf_property property;
- } elf_property_list;
- struct bfd_elf_section_reloc_data;
- struct elf_backend_data
- {
- /* The architecture for this backend. */
- enum bfd_architecture arch;
- /* An identifier used to distinguish different target specific
- extensions to elf_obj_tdata and elf_link_hash_table structures. */
- enum elf_target_id target_id;
- /* Target OS. */
- enum elf_target_os target_os;
- /* The ELF machine code (EM_xxxx) for this backend. */
- int elf_machine_code;
- /* EI_OSABI. */
- int elf_osabi;
- /* The maximum page size for this backend. */
- bfd_vma maxpagesize;
- /* The minimum page size for this backend. An input object will not be
- considered page aligned unless its sections are correctly aligned for
- pages at least this large. May be smaller than maxpagesize. */
- bfd_vma minpagesize;
- /* The common page size for this backend. */
- bfd_vma commonpagesize;
- /* The p_align value for this backend. If it is set, p_align of
- PT_LOAD alignment will be to p_align by default. */
- bfd_vma p_align;
- /* The BFD flags applied to sections created for dynamic linking. */
- flagword dynamic_sec_flags;
- /* Architecture-specific data for this backend.
- This is actually a pointer to some type like struct elf_ARCH_data. */
- const void *arch_data;
- /* A function to translate an ELF RELA relocation to a BFD arelent
- structure. Returns TRUE upon success, FALSE otherwise. */
- bool (*elf_info_to_howto)
- (bfd *, arelent *, Elf_Internal_Rela *);
- /* A function to translate an ELF REL relocation to a BFD arelent
- structure. Returns TRUE upon success, FALSE otherwise. */
- bool (*elf_info_to_howto_rel)
- (bfd *, arelent *, Elf_Internal_Rela *);
- /* A function to determine whether a symbol is global when
- partitioning the symbol table into local and global symbols.
- This should be NULL for most targets, in which case the correct
- thing will be done. MIPS ELF, at least on the Irix 5, has
- special requirements. */
- bool (*elf_backend_sym_is_global)
- (bfd *, asymbol *);
- /* The remaining functions are hooks which are called only if they
- are not NULL. */
- /* A function to permit a backend specific check on whether a
- particular BFD format is relevant for an object file, and to
- permit the backend to set any global information it wishes. When
- this is called elf_elfheader is set, but anything else should be
- used with caution. If this returns FALSE, the check_format
- routine will return a bfd_error_wrong_format error. */
- bool (*elf_backend_object_p)
- (bfd *);
- /* A function to do additional symbol processing when reading the
- ELF symbol table. This is where any processor-specific special
- section indices are handled. */
- void (*elf_backend_symbol_processing)
- (bfd *, asymbol *);
- /* A function to do additional symbol processing after reading the
- entire ELF symbol table. */
- bool (*elf_backend_symbol_table_processing)
- (bfd *, elf_symbol_type *, unsigned int);
- /* A function to set the type of the info field. Processor-specific
- types should be handled here. */
- int (*elf_backend_get_symbol_type)
- (Elf_Internal_Sym *, int);
- /* A function to return the linker hash table entry of a symbol that
- might be satisfied by an archive symbol. */
- struct bfd_link_hash_entry * (*elf_backend_archive_symbol_lookup)
- (bfd *, struct bfd_link_info *, const char *);
- /* Return true if local section symbols should have a non-null st_name.
- NULL implies false. */
- bool (*elf_backend_name_local_section_symbols)
- (bfd *);
- /* A function to do additional processing on the ELF section header
- just before writing it out. This is used to set the flags and
- type fields for some sections, or to actually write out data for
- unusual sections. */
- bool (*elf_backend_section_processing)
- (bfd *, Elf_Internal_Shdr *);
- /* A function to handle unusual section types when creating BFD
- sections from ELF sections. */
- bool (*elf_backend_section_from_shdr)
- (bfd *, Elf_Internal_Shdr *, const char *, int);
- /* A function to convert machine dependent ELF section header flags to
- BFD internal section header flags. */
- bool (*elf_backend_section_flags)
- (const Elf_Internal_Shdr *);
- /* A function that returns a struct containing ELF section flags and
- type for the given BFD section. */
- const struct bfd_elf_special_section * (*get_sec_type_attr)
- (bfd *, asection *);
- /* A function to handle unusual program segment types when creating BFD
- sections from ELF program segments. */
- bool (*elf_backend_section_from_phdr)
- (bfd *, Elf_Internal_Phdr *, int, const char *);
- /* A function to set up the ELF section header for a BFD section in
- preparation for writing it out. This is where the flags and type
- fields are set for unusual sections. */
- bool (*elf_backend_fake_sections)
- (bfd *, Elf_Internal_Shdr *, asection *);
- /* A function to get the ELF section index for a BFD section. If
- this returns TRUE, the section was found. If it is a normal ELF
- section, *RETVAL should be left unchanged. If it is not a normal
- ELF section *RETVAL should be set to the SHN_xxxx index. */
- bool (*elf_backend_section_from_bfd_section)
- (bfd *, asection *, int *retval);
- /* If this field is not NULL, it is called by the add_symbols phase
- of a link just before adding a symbol to the global linker hash
- table. It may modify any of the fields as it wishes. If *NAME
- is set to NULL, the symbol will be skipped rather than being
- added to the hash table. This function is responsible for
- handling all processor dependent symbol bindings and section
- indices, and must set at least *FLAGS and *SEC for each processor
- dependent case; failure to do so will cause a link error. */
- bool (*elf_add_symbol_hook)
- (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
- const char **name, flagword *flags, asection **sec, bfd_vma *value);
- /* If this field is not NULL, it is called by the elf_link_output_sym
- phase of a link for each symbol which will appear in the object file.
- On error, this function returns 0. 1 is returned when the symbol
- should be output, 2 is returned when the symbol should be discarded. */
- int (*elf_backend_link_output_symbol_hook)
- (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
- asection *, struct elf_link_hash_entry *);
- /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
- linker the first time it encounters a dynamic object in the link.
- This function must create any sections required for dynamic
- linking. The ABFD argument is a dynamic object. The .interp,
- .dynamic, .dynsym, .dynstr, and .hash functions have already been
- created, and this function may modify the section flags if
- desired. This function will normally create the .got and .plt
- sections, but different backends have different requirements. */
- bool (*elf_backend_create_dynamic_sections)
- (bfd *abfd, struct bfd_link_info *info);
- /* When creating a shared library, determine whether to omit the
- dynamic symbol for the section. */
- bool (*elf_backend_omit_section_dynsym)
- (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
- /* Return TRUE if relocations of targets are compatible to the extent
- that CHECK_RELOCS will properly process them. PR 4424. */
- bool (*relocs_compatible) (const bfd_target *, const bfd_target *);
- /* The CHECK_RELOCS function is called after all input files have been
- opened. It is called once for each section with relocs of an object
- file. The function must look through the relocs and do any special
- handling required. This generally means allocating space in the
- global offset table, and perhaps allocating space for a reloc. The
- relocs are always passed as Rela structures; if the section
- actually uses Rel structures, the r_addend field will always be
- zero. */
- bool (*check_relocs)
- (bfd *abfd, struct bfd_link_info *info, asection *o,
- const Elf_Internal_Rela *relocs);
- /* The SIZE_RELATIVE_RELOCS function is called to size relative
- relocations when mappig sections to segments. */
- bool (*size_relative_relocs)
- (struct bfd_link_info *info, bool *need_layout);
- /* The FINISH_RELATIVE_RELOCS function is called to finish relative
- relocations in bfd_elf_final_link. */
- bool (*finish_relative_relocs)
- (struct bfd_link_info *info);
- /* The CHECK_DIRECTIVES function is called once per input file by
- the add_symbols phase of the ELF backend linker. The function
- must inspect the bfd and create any additional symbols according
- to any custom directives in the bfd. */
- bool (*check_directives)
- (bfd *abfd, struct bfd_link_info *info);
- /* The NOTICE_AS_NEEDED function is called as the linker is about to
- handle an as-needed lib (ACT = notice_as_needed), and after the
- linker has decided to keep the lib (ACT = notice_needed) or when
- the lib is not needed (ACT = notice_not_needed). */
- bool (*notice_as_needed)
- (bfd *abfd, struct bfd_link_info *info, enum notice_asneeded_action act);
- /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
- linker for every symbol which is defined by a dynamic object and
- referenced by a regular object. This is called after all the
- input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
- function has been called. The hash table entry should be
- bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
- defined in a section from a dynamic object. Dynamic object
- sections are not included in the final link, and this function is
- responsible for changing the value to something which the rest of
- the link can deal with. This will normally involve adding an
- entry to the .plt or .got or some such section, and setting the
- symbol to point to that. */
- bool (*elf_backend_adjust_dynamic_symbol)
- (struct bfd_link_info *info, struct elf_link_hash_entry *h);
- /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
- after all the linker input files have been seen but before the
- section sizes have been set. This is called after
- ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
- bool (*elf_backend_always_size_sections)
- (bfd *output_bfd, struct bfd_link_info *info);
- /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
- linker after all the linker input files have been seen but before
- the sections sizes have been set. This is called after
- ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
- It is only called when linking against a dynamic object. It must
- set the sizes of the dynamic sections, and may fill in their
- contents as well. The generic ELF linker can handle the .dynsym,
- .dynstr and .hash sections. This function must handle the
- .interp section and any sections created by the
- CREATE_DYNAMIC_SECTIONS entry point. */
- bool (*elf_backend_size_dynamic_sections)
- (bfd *output_bfd, struct bfd_link_info *info);
- /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
- ELF backend linker to strip zero-sized dynamic sections after
- the section sizes have been set. */
- bool (*elf_backend_strip_zero_sized_dynamic_sections)
- (struct bfd_link_info *info);
- /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
- we keep to use as a base for relocs and symbols. */
- void (*elf_backend_init_index_section)
- (bfd *output_bfd, struct bfd_link_info *info);
- /* The RELOCATE_SECTION function is called by the ELF backend linker
- to handle the relocations for a section.
- The relocs are always passed as Rela structures; if the section
- actually uses Rel structures, the r_addend field will always be
- zero.
- This function is responsible for adjust the section contents as
- necessary, and (if using Rela relocs and generating a
- relocatable output file) adjusting the reloc addend as
- necessary.
- This function does not have to worry about setting the reloc
- address or the reloc symbol index.
- LOCAL_SYMS is a pointer to the swapped in local symbols.
- LOCAL_SECTIONS is an array giving the section in the input file
- corresponding to the st_shndx field of each local symbol.
- The global hash table entry for the global symbols can be found
- via elf_sym_hashes (input_bfd).
- When generating relocatable output, this function must handle
- STB_LOCAL/STT_SECTION symbols specially. The output symbol is
- going to be the section symbol corresponding to the output
- section, which means that the addend must be adjusted
- accordingly.
- Returns FALSE on error, TRUE on success, 2 if successful and
- relocations should be written for this section. */
- int (*elf_backend_relocate_section)
- (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
- asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
- Elf_Internal_Sym *local_syms, asection **local_sections);
- /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
- linker just before it writes a symbol out to the .dynsym section.
- The processor backend may make any required adjustment to the
- symbol. It may also take the opportunity to set contents of the
- dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
- all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
- on those symbols which are defined by a dynamic object. */
- bool (*elf_backend_finish_dynamic_symbol)
- (bfd *output_bfd, struct bfd_link_info *info,
- struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
- /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
- linker just before it writes all the dynamic sections out to the
- output file. The FINISH_DYNAMIC_SYMBOL will have been called on
- all dynamic symbols. */
- bool (*elf_backend_finish_dynamic_sections)
- (bfd *output_bfd, struct bfd_link_info *info);
- /* A function to do any beginning processing needed for the ELF file
- before building the ELF headers and computing file positions. */
- void (*elf_backend_begin_write_processing)
- (bfd *, struct bfd_link_info *);
- /* A function to do any final processing needed for the ELF file
- before writing it out. */
- bool (*elf_backend_final_write_processing)
- (bfd *);
- /* This function is called by get_program_header_size. It should
- return the number of additional program segments which this BFD
- will need. It should return -1 on error. */
- int (*elf_backend_additional_program_headers)
- (bfd *, struct bfd_link_info *);
- /* This function is called to modify an existing segment map in a
- backend specific fashion. */
- bool (*elf_backend_modify_segment_map)
- (bfd *, struct bfd_link_info *);
- /* This function is called to modify program headers just before
- they are written. */
- bool (*elf_backend_modify_headers)
- (bfd *, struct bfd_link_info *);
- /* This function is called to see if the PHDR header should be
- checked for validity. */
- bool (*elf_backend_allow_non_load_phdr)
- (bfd *, const Elf_Internal_Phdr *, unsigned);
- /* This function is called before section garbage collection to
- mark entry symbol sections. */
- void (*gc_keep)
- (struct bfd_link_info *);
- /* This function is called during section garbage collection to
- mark sections that define global symbols. */
- bool (*gc_mark_dynamic_ref)
- (struct elf_link_hash_entry *, void *);
- /* This function is called during section gc to discover the section a
- particular relocation refers to. */
- elf_gc_mark_hook_fn gc_mark_hook;
- /* This function, if defined, is called after the first gc marking pass
- to allow the backend to mark additional sections. */
- bool (*gc_mark_extra_sections)
- (struct bfd_link_info *, elf_gc_mark_hook_fn);
- /* This function is called to initialise ELF file header info.
- Customised versions can modify things like the OS and ABI version. */
- bool (*elf_backend_init_file_header)
- (bfd *, struct bfd_link_info *);
- /* This function, if defined, prints a symbol to file and returns the
- name of the symbol to be printed. It should return NULL to fall
- back to default symbol printing. */
- const char *(*elf_backend_print_symbol_all)
- (bfd *, void *, asymbol *);
- /* This function, if defined, is called after all local symbols and
- global symbols converted to locals are emitted into the symtab
- section. It allows the backend to emit special local symbols
- not handled in the hash table. */
- bool (*elf_backend_output_arch_local_syms)
- (bfd *, struct bfd_link_info *, void *,
- int (*) (void *, const char *, Elf_Internal_Sym *, asection *,
- struct elf_link_hash_entry *));
- /* This function, if defined, is called after all symbols are emitted
- into the symtab section. It allows the backend to emit special
- global symbols not handled in the hash table. */
- bool (*elf_backend_output_arch_syms)
- (bfd *, struct bfd_link_info *, void *,
- int (*) (void *, const char *, Elf_Internal_Sym *, asection *,
- struct elf_link_hash_entry *));
- /* Filter what symbols of the output file to include in the import
- library if one is created. */
- unsigned int (*elf_backend_filter_implib_symbols)
- (bfd *, struct bfd_link_info *, asymbol **, long);
- /* Copy any information related to dynamic linking from a pre-existing
- symbol to a newly created symbol. Also called to copy flags and
- other back-end info to a weakdef, in which case the symbol is not
- newly created and plt/got refcounts and dynamic indices should not
- be copied. */
- void (*elf_backend_copy_indirect_symbol)
- (struct bfd_link_info *, struct elf_link_hash_entry *,
- struct elf_link_hash_entry *);
- /* Modify any information related to dynamic linking such that the
- symbol is not exported. */
- void (*elf_backend_hide_symbol)
- (struct bfd_link_info *, struct elf_link_hash_entry *, bool);
- /* A function to do additional symbol fixup, called by
- _bfd_elf_fix_symbol_flags. */
- bool (*elf_backend_fixup_symbol)
- (struct bfd_link_info *, struct elf_link_hash_entry *);
- /* Merge the backend specific symbol attribute. */
- void (*elf_backend_merge_symbol_attribute)
- (struct elf_link_hash_entry *, unsigned int, bool, bool);
- /* This function, if defined, will return a string containing the
- name of a target-specific dynamic tag. */
- char *(*elf_backend_get_target_dtag)
- (bfd_vma);
- /* Decide whether an undefined symbol is special and can be ignored.
- This is the case for OPTIONAL symbols on IRIX. */
- bool (*elf_backend_ignore_undef_symbol)
- (struct elf_link_hash_entry *);
- /* Emit relocations. Overrides default routine for emitting relocs,
- except during a relocatable link, or if all relocs are being emitted. */
- bool (*elf_backend_emit_relocs)
- (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
- struct elf_link_hash_entry **);
- /* Update relocations. It is allowed to change the number and the order.
- In such a case hashes should be invalidated. */
- void (*elf_backend_update_relocs)
- (asection *, struct bfd_elf_section_reloc_data *);
- /* Count relocations. Not called for relocatable links
- or if all relocs are being preserved in the output. */
- unsigned int (*elf_backend_count_relocs)
- (struct bfd_link_info *, asection *);
- /* Count additionals relocations. Called for relocatable links if
- additional relocations needs to be created. */
- unsigned int (*elf_backend_count_additional_relocs)
- (asection *);
- /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
- by r_offset. If NULL, default to true. */
- bool (*sort_relocs_p)
- (asection *);
- /* This function, if defined, is called when an NT_PRSTATUS note is found
- in a core file. */
- bool (*elf_backend_grok_prstatus)
- (bfd *, Elf_Internal_Note *);
- /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
- note is found in a core file. */
- bool (*elf_backend_grok_psinfo)
- (bfd *, Elf_Internal_Note *);
- /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
- note is found in a core file. */
- bool (*elf_backend_grok_freebsd_prstatus)
- (bfd *, Elf_Internal_Note *);
- /* This function, if defined, is called to write a note to a corefile. */
- char *(*elf_backend_write_core_note)
- (bfd *abfd, char *buf, int *bufsiz, int note_type, ...);
- /* This function, if defined, is called to convert target-specific
- section flag names into hex values. */
- flagword (*elf_backend_lookup_section_flags_hook)
- (char *);
- /* This function returns class of a reloc type. */
- enum elf_reloc_type_class (*elf_backend_reloc_type_class)
- (const struct bfd_link_info *, const asection *, const Elf_Internal_Rela *);
- /* This function, if defined, removes information about discarded functions
- from other sections which mention them. */
- bool (*elf_backend_discard_info)
- (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
- /* This function, if defined, signals that the function above has removed
- the discarded relocations for this section. */
- bool (*elf_backend_ignore_discarded_relocs)
- (asection *);
- /* What to do when ld finds relocations against symbols defined in
- discarded sections. */
- unsigned int (*action_discarded)
- (asection *);
- /* This function returns the width of FDE pointers in bytes, or 0 if
- that can't be determined for some reason. The default definition
- goes by the bfd's EI_CLASS. */
- unsigned int (*elf_backend_eh_frame_address_size)
- (bfd *, const asection *);
- /* These functions tell elf-eh-frame whether to attempt to turn
- absolute or lsda encodings into pc-relative ones. The default
- definition enables these transformations. */
- bool (*elf_backend_can_make_relative_eh_frame)
- (bfd *, struct bfd_link_info *, asection *);
- bool (*elf_backend_can_make_lsda_relative_eh_frame)
- (bfd *, struct bfd_link_info *, asection *);
- /* This function returns an encoding after computing the encoded
- value (and storing it in ENCODED) for the given OFFSET into OSEC,
- to be stored in at LOC_OFFSET into the LOC_SEC input section.
- The default definition chooses a 32-bit PC-relative encoding. */
- bfd_byte (*elf_backend_encode_eh_address)
- (bfd *abfd, struct bfd_link_info *info,
- asection *osec, bfd_vma offset,
- asection *loc_sec, bfd_vma loc_offset,
- bfd_vma *encoded);
- /* This function, if defined, may write out the given section.
- Returns TRUE if it did so and FALSE if the caller should. */
- bool (*elf_backend_write_section)
- (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
- /* This function, if defined, returns TRUE if it is section symbols
- only that are considered local for the purpose of partitioning the
- symbol table into local and global symbols. This should be NULL
- for most targets, in which case the correct thing will be done.
- MIPS ELF, at least on the Irix 5, has special requirements. */
- bool (*elf_backend_elfsym_local_is_section)
- (bfd *);
- /* The level of IRIX compatibility we're striving for.
- MIPS ELF specific function. */
- irix_compat_t (*elf_backend_mips_irix_compat)
- (bfd *);
- reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
- (bfd *, unsigned int, bool);
- /* The swapping table to use when dealing with ECOFF information.
- Used for the MIPS ELF .mdebug section. */
- const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
- /* This function implements `bfd_elf_bfd_from_remote_memory';
- see elf.c, elfcode.h. */
- bfd *(*elf_backend_bfd_from_remote_memory)
- (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep,
- int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr,
- bfd_size_type len));
- bool (*elf_backend_core_find_build_id) (bfd *, bfd_vma);
- /* This function is used by `_bfd_elf_get_synthetic_symtab';
- see elf.c. */
- bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
- /* Is symbol defined in common section? */
- bool (*common_definition) (Elf_Internal_Sym *);
- /* Return a common section index for section. */
- unsigned int (*common_section_index) (asection *);
- /* Return a common section for section. */
- asection *(*common_section) (asection *);
- /* Return TRUE if we can merge 2 definitions. */
- bool (*merge_symbol) (struct elf_link_hash_entry *,
- const Elf_Internal_Sym *, asection **,
- bool, bool,
- bfd *, const asection *);
- /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
- bool (*elf_hash_symbol) (struct elf_link_hash_entry *);
- /* If non-NULL, called to register the location of XLAT_LOC within
- .MIPS.xhash at which real final dynindx for H will be written.
- If XLAT_LOC is zero, the symbol is not included in
- .MIPS.xhash and no dynindx will be written. */
- void (*record_xhash_symbol)
- (struct elf_link_hash_entry *h, bfd_vma xlat_loc);
- /* Return TRUE if type is a function symbol type. */
- bool (*is_function_type) (unsigned int type);
- /* If the ELF symbol SYM might be a function in SEC, return the
- function size and set *CODE_OFF to the function's entry point,
- otherwise return zero. */
- bfd_size_type (*maybe_function_sym) (const asymbol *sym, asection *sec,
- bfd_vma *code_off);
- /* Given NAME, the name of a relocation section stripped of its
- .rel/.rela prefix, return the section in ABFD to which the
- relocations apply. */
- asection *(*get_reloc_section) (bfd *abfd, const char *name);
- /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
- has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
- FALSE otherwise. Can be called multiple times for a given section,
- until it returns TRUE. Most of the times it is called ISECTION will be
- set to an input section that might be associated with the output section.
- The last time that it is called, ISECTION will be set to NULL. */
- bool (*elf_backend_copy_special_section_fields)
- (const bfd *ibfd, bfd *obfd, const Elf_Internal_Shdr *isection,
- Elf_Internal_Shdr *osection);
- /* Used to handle bad SHF_LINK_ORDER input. */
- void (*link_order_error_handler) (const char *, ...);
- /* Name of the PLT relocation section. */
- const char *relplt_name;
- /* Alternate EM_xxxx machine codes for this backend. */
- int elf_machine_alt1;
- int elf_machine_alt2;
- const struct elf_size_info *s;
- /* An array of target specific special sections. */
- const struct bfd_elf_special_section *special_sections;
- /* The size in bytes of the header for the GOT. This includes the
- so-called reserved entries on some systems. */
- bfd_vma got_header_size;
- /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
- otherwise by the local symbol with index SYMNDX in IBFD. */
- bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *,
- struct elf_link_hash_entry *h,
- bfd *ibfd, unsigned long symndx);
- /* The vendor name to use for a processor-standard attributes section. */
- const char *obj_attrs_vendor;
- /* The section name to use for a processor-standard attributes section. */
- const char *obj_attrs_section;
- /* Return 1, 2 or 3 to indicate what type of arguments a
- processor-specific tag takes. */
- int (*obj_attrs_arg_type) (int);
- /* The section type to use for an attributes section. */
- unsigned int obj_attrs_section_type;
- /* This function determines the order in which any attributes are
- written. It must be defined for input in the range
- LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
- is used in order to make unity easy). The returned value is the
- actual tag number to place in the input position. */
- int (*obj_attrs_order) (int);
- /* Handle merging unknown attributes; either warn and return TRUE,
- or give an error and return FALSE. */
- bool (*obj_attrs_handle_unknown) (bfd *, int);
- /* Parse GNU properties. Return the property kind. If the property
- is corrupt, issue an error message and return property_corrupt. */
- enum elf_property_kind (*parse_gnu_properties) (bfd *, unsigned int,
- bfd_byte *,
- unsigned int);
- /* Merge GNU properties. Return TRUE if property is updated. */
- bool (*merge_gnu_properties) (struct bfd_link_info *, bfd *, bfd *,
- elf_property *, elf_property *);
- /* Set up GNU properties. */
- bfd *(*setup_gnu_properties) (struct bfd_link_info *);
- /* Fix up GNU properties. */
- void (*fixup_gnu_properties) (struct bfd_link_info *,
- elf_property_list **);
- /* Encoding used for compact EH tables. */
- int (*compact_eh_encoding) (struct bfd_link_info *);
- /* Opcode representing no unwind. */
- int (*cant_unwind_opcode) (struct bfd_link_info *);
- /* Called when emitting an ELF symbol whoes input version had an
- ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
- Returns the value to be installed in the ST_SHNDX field of the
- emitted symbol. If not defined, the value is left unchanged. */
- unsigned int (*symbol_section_index) (bfd *, elf_symbol_type *);
-
- /* Called when a section has extra reloc sections. */
- bool (*init_secondary_reloc_section) (bfd *, Elf_Internal_Shdr *,
- const char *, unsigned int);
- /* Called when after loading the normal relocs for a section. */
- bool (*slurp_secondary_relocs) (bfd *, asection *, asymbol **, bool);
- /* Called after writing the normal relocs for a section. */
- bool (*write_secondary_relocs) (bfd *, asection *);
- /* This is non-zero if static TLS segments require a special alignment. */
- unsigned static_tls_alignment;
- /* Alignment for the PT_GNU_STACK segment. */
- unsigned stack_align;
- /* Flag bits to assign to a section of type SHT_STRTAB. */
- unsigned long elf_strtab_flags;
- /* This is TRUE if the linker should act like collect and gather
- global constructors and destructors by name. This is TRUE for
- MIPS ELF because the Irix 5 tools can not handle the .init
- section. */
- unsigned collect : 1;
- /* This is TRUE if the linker should ignore changes to the type of a
- symbol. This is TRUE for MIPS ELF because some Irix 5 objects
- record undefined functions as STT_OBJECT although the definitions
- are STT_FUNC. */
- unsigned type_change_ok : 1;
- /* Whether the backend may use REL relocations. (Some backends use
- both REL and RELA relocations, and this flag is set for those
- backends.) */
- unsigned may_use_rel_p : 1;
- /* Whether the backend may use RELA relocations. (Some backends use
- both REL and RELA relocations, and this flag is set for those
- backends.) */
- unsigned may_use_rela_p : 1;
- /* Whether the default relocation type is RELA. If a backend with
- this flag set wants REL relocations for a particular section,
- it must note that explicitly. Similarly, if this flag is clear,
- and the backend wants RELA relocations for a particular
- section. */
- unsigned default_use_rela_p : 1;
- /* True if PLT and copy relocations should be RELA by default. */
- unsigned rela_plts_and_copies_p : 1;
- /* Set if RELA relocations for a relocatable link can be handled by
- generic code. Backends that set this flag need do nothing in the
- backend relocate_section routine for relocatable linking. */
- unsigned rela_normal : 1;
- /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
- relocations. */
- unsigned dtrel_excludes_plt : 1;
- /* TRUE if addresses "naturally" sign extend. This is used when
- swapping in from Elf32 when BFD64. */
- unsigned sign_extend_vma : 1;
- unsigned want_got_plt : 1;
- unsigned plt_readonly : 1;
- unsigned want_plt_sym : 1;
- unsigned plt_not_loaded : 1;
- unsigned plt_alignment : 4;
- unsigned can_gc_sections : 1;
- unsigned can_refcount : 1;
- unsigned want_got_sym : 1;
- unsigned want_dynbss : 1;
- unsigned want_dynrelro : 1;
- /* Targets which do not support physical addressing often require
- that the p_paddr field in the section header to be set to zero.
- This field indicates whether this behavior is required. */
- unsigned want_p_paddr_set_to_zero : 1;
- /* Target has broken hardware and/or kernel that requires pages not
- to be mapped twice with different permissions. */
- unsigned no_page_alias : 1;
- /* True if an object file lacking a .note.GNU-stack section
- should be assumed to be requesting exec stack. At least one
- other file in the link needs to have a .note.GNU-stack section
- for a PT_GNU_STACK segment to be created. */
- unsigned default_execstack : 1;
- /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
- in length rather than sec->size in length, if sec->rawsize is
- non-zero and smaller than sec->size. */
- unsigned caches_rawsize : 1;
- /* Address of protected data defined in the shared library may be
- external, i.e., due to copy relocation. */
- unsigned extern_protected_data : 1;
- /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
- static binaries. */
- unsigned always_renumber_dynsyms : 1;
- /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
- members use a 16-bit data type. */
- unsigned linux_prpsinfo32_ugid16 : 1;
- /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
- members use a 16-bit data type. */
- unsigned linux_prpsinfo64_ugid16 : 1;
- };
- /* Information about reloc sections associated with a bfd_elf_section_data
- structure. */
- struct bfd_elf_section_reloc_data
- {
- /* The ELF header for the reloc section associated with this
- section, if any. */
- Elf_Internal_Shdr *hdr;
- /* The number of relocations currently assigned to HDR. */
- unsigned int count;
- /* The ELF section number of the reloc section. Only used for an
- output file. */
- int idx;
- /* Used by the backend linker to store the symbol hash table entries
- associated with relocs against global symbols. */
- struct elf_link_hash_entry **hashes;
- };
- /* Information stored for each BFD section in an ELF file. This
- structure is allocated by elf_new_section_hook. */
- struct bfd_elf_section_data
- {
- /* The ELF header for this section. */
- Elf_Internal_Shdr this_hdr;
- /* INPUT_SECTION_FLAGS if specified in the linker script. */
- struct flag_info *section_flag_info;
- /* Information about the REL and RELA reloc sections associated
- with this section, if any. */
- struct bfd_elf_section_reloc_data rel, rela;
- /* The ELF section number of this section. */
- int this_idx;
- /* Used by the backend linker when generating a shared library to
- record the dynamic symbol index for a section symbol
- corresponding to this section. A value of 0 means that there is
- no dynamic symbol for this section. */
- int dynindx;
- /* A pointer to the linked-to section for SHF_LINK_ORDER. */
- asection *linked_to;
- /* A pointer to the swapped relocs. If the section uses REL relocs,
- rather than RELA, all the r_addend fields will be zero. This
- pointer may be NULL. It is used by the backend linker. */
- Elf_Internal_Rela *relocs;
- /* A pointer to a linked list tracking dynamic relocs copied for
- local symbols. */
- void *local_dynrel;
- /* A pointer to the bfd section used for dynamic relocs. */
- asection *sreloc;
- union {
- /* Group name, if this section is a member of a group. */
- const char *name;
- /* Group signature sym, if this is the SHT_GROUP section. */
- struct bfd_symbol *id;
- } group;
- /* For a member of a group, points to the SHT_GROUP section.
- NULL for the SHT_GROUP section itself and non-group sections. */
- asection *sec_group;
- /* A linked list of member sections in the group. Circular when used by
- the linker. For the SHT_GROUP section, points at first member. */
- asection *next_in_group;
- /* The FDEs associated with this section. The u.fde.next_in_section
- field acts as a chain pointer. */
- struct eh_cie_fde *fde_list;
- /* Link from a text section to its .eh_frame_entry section. */
- asection *eh_frame_entry;
- /* TRUE if the section has secondary reloc sections associated with it.
- FIXME: In the future it might be better to change this into a list
- of secondary reloc sections, making lookup easier and faster. */
- bool has_secondary_relocs;
- /* A pointer used for various section optimizations. */
- void *sec_info;
- };
- #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
- #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
- #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
- #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
- #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
- #define elf_group_name(sec) (elf_section_data(sec)->group.name)
- #define elf_group_id(sec) (elf_section_data(sec)->group.id)
- #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
- #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
- #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
- #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
- #define xvec_get_elf_backend_data(xvec) \
- ((const struct elf_backend_data *) (xvec)->backend_data)
- #define get_elf_backend_data(abfd) \
- xvec_get_elf_backend_data ((abfd)->xvec)
- /* The least object attributes (within an attributes subsection) known
- for any target. Some code assumes that the value 0 is not used and
- the field for that attribute can instead be used as a marker to
- indicate that attributes have been initialized. */
- #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
- /* The maximum number of known object attributes for any target. */
- #define NUM_KNOWN_OBJ_ATTRIBUTES 77
- /* The value of an object attribute. The type indicates whether the attribute
- holds and integer, a string, or both. It can also indicate that there can
- be no default (i.e. all values must be written to file, even zero), or
- that the value is in error and should not be written to file. */
- typedef struct obj_attribute
- {
- #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
- #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
- #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
- #define ATTR_TYPE_FLAG_ERROR (1 << 3)
- #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
- #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
- #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
- #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
- int type;
- unsigned int i;
- char *s;
- } obj_attribute;
- typedef struct obj_attribute_list
- {
- struct obj_attribute_list *next;
- unsigned int tag;
- obj_attribute attr;
- } obj_attribute_list;
- /* Object attributes may either be defined by the processor ABI, index
- OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
- (and possibly also processor-specific), index OBJ_ATTR_GNU. */
- #define OBJ_ATTR_PROC 0
- #define OBJ_ATTR_GNU 1
- #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
- #define OBJ_ATTR_LAST OBJ_ATTR_GNU
- /* The following object attribute tags are taken as generic, for all
- targets and for "gnu" where there is no target standard. */
- enum
- {
- Tag_NULL = 0,
- Tag_File = 1,
- Tag_Section = 2,
- Tag_Symbol = 3,
- Tag_compatibility = 32
- };
- /* The following struct stores information about every SystemTap section
- found in the object file. */
- struct sdt_note
- {
- struct sdt_note *next;
- bfd_size_type size;
- bfd_byte data[1];
- };
- /* tdata information grabbed from an elf core file. */
- struct core_elf_obj_tdata
- {
- int signal;
- int pid;
- int lwpid;
- char* program;
- char* command;
- };
- /* Extra tdata information held for output ELF BFDs. */
- struct output_elf_obj_tdata
- {
- struct elf_segment_map *seg_map;
- struct elf_strtab_hash *strtab_ptr;
- /* STT_SECTION symbols for each section */
- asymbol **section_syms;
- /* NT_GNU_BUILD_ID note type info. */
- struct
- {
- bool (*after_write_object_contents) (bfd *);
- const char *style;
- asection *sec;
- } build_id;
- /* Records the result of `get_program_header_size'. */
- bfd_size_type program_header_size;
- /* Used when laying out sections. */
- file_ptr next_file_pos;
- /* Linker information. */
- struct bfd_link_info *link_info;
- unsigned int num_section_syms;
- unsigned int shstrtab_section, strtab_section;
- /* Segment flags for the PT_GNU_STACK segment. */
- unsigned int stack_flags;
- /* Used to determine if the e_flags field has been initialized */
- bool flags_init;
- };
- /* Indicate if the bfd contains SHF_GNU_MBIND/SHF_GNU_RETAIN sections or
- symbols that have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE
- binding. Used to set the osabi field in the ELF header structure. */
- enum elf_gnu_osabi
- {
- elf_gnu_osabi_mbind = 1 << 0,
- elf_gnu_osabi_ifunc = 1 << 1,
- elf_gnu_osabi_unique = 1 << 2,
- elf_gnu_osabi_retain = 1 << 3,
- };
- typedef struct elf_section_list
- {
- Elf_Internal_Shdr hdr;
- unsigned int ndx;
- struct elf_section_list * next;
- } elf_section_list;
- enum dynamic_lib_link_class {
- DYN_NORMAL = 0,
- DYN_AS_NEEDED = 1,
- DYN_DT_NEEDED = 2,
- DYN_NO_ADD_NEEDED = 4,
- DYN_NO_NEEDED = 8
- };
- /* Some private data is stashed away for future use using the tdata pointer
- in the bfd structure. */
- struct elf_obj_tdata
- {
- Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
- Elf_Internal_Shdr **elf_sect_ptr;
- Elf_Internal_Phdr *phdr;
- Elf_Internal_Shdr symtab_hdr;
- Elf_Internal_Shdr shstrtab_hdr;
- Elf_Internal_Shdr strtab_hdr;
- Elf_Internal_Shdr dynsymtab_hdr;
- Elf_Internal_Shdr dynstrtab_hdr;
- Elf_Internal_Shdr dynversym_hdr;
- Elf_Internal_Shdr dynverref_hdr;
- Elf_Internal_Shdr dynverdef_hdr;
- elf_section_list * symtab_shndx_list;
- bfd_vma gp; /* The gp value */
- unsigned int gp_size; /* The gp size */
- unsigned int num_elf_sections; /* elf_sect_ptr size */
- unsigned char *being_created;
- /* A mapping from external symbols to entries in the linker hash
- table, used when linking. This is indexed by the symbol index
- minus the sh_info field of the symbol table header. */
- struct elf_link_hash_entry **sym_hashes;
- /* Track usage and final offsets of GOT entries for local symbols.
- This array is indexed by symbol index. Elements are used
- identically to "got" in struct elf_link_hash_entry. */
- union
- {
- bfd_signed_vma *refcounts;
- bfd_vma *offsets;
- struct got_entry **ents;
- } local_got;
- /* The linker ELF emulation code needs to let the backend ELF linker
- know what filename should be used for a dynamic object if the
- dynamic object is found using a search. The emulation code then
- sometimes needs to know what name was actually used. Until the
- file has been added to the linker symbol table, this field holds
- the name the linker wants. After it has been added, it holds the
- name actually used, which will be the DT_SONAME entry if there is
- one. */
- const char *dt_name;
- /* The linker emulation needs to know what audit libs
- are used by a dynamic object. */
- const char *dt_audit;
- /* Used by find_nearest_line entry point. */
- void *line_info;
- /* A place to stash dwarf1 info for this bfd. */
- struct dwarf1_debug *dwarf1_find_line_info;
- /* A place to stash dwarf2 info for this bfd. */
- void *dwarf2_find_line_info;
- /* Stash away info for yet another find line/function variant. */
- void *elf_find_function_cache;
- /* Number of symbol version definitions we are about to emit. */
- unsigned int cverdefs;
- /* Number of symbol version references we are about to emit. */
- unsigned int cverrefs;
- /* Symbol version definitions in external objects. */
- Elf_Internal_Verdef *verdef;
- /* Symbol version references to external objects. */
- Elf_Internal_Verneed *verref;
- /* A pointer to the .eh_frame section. */
- asection *eh_frame_section;
- /* Symbol buffer. */
- void *symbuf;
- /* List of GNU properties. Will be updated by setup_gnu_properties
- after all input GNU properties are merged for output. */
- elf_property_list *properties;
- obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES];
- obj_attribute_list *other_obj_attributes[2];
- /* Linked-list containing information about every Systemtap section
- found in the object file. Each section corresponds to one entry
- in the list. */
- struct sdt_note *sdt_note_head;
- Elf_Internal_Shdr **group_sect_ptr;
- unsigned int num_group;
- /* Index into group_sect_ptr, updated by setup_group when finding a
- section's group. Used to optimize subsequent group searches. */
- unsigned int group_search_offset;
- unsigned int symtab_section, dynsymtab_section;
- unsigned int dynversym_section, dynverdef_section, dynverref_section;
- /* An identifier used to distinguish different target
- specific extensions to this structure. */
- ENUM_BITFIELD (elf_target_id) object_id : 6;
- /* Whether a dyanmic object was specified normally on the linker
- command line, or was specified when --as-needed was in effect,
- or was found via a DT_NEEDED entry. */
- ENUM_BITFIELD (dynamic_lib_link_class) dyn_lib_class : 4;
- /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
- ENUM_BITFIELD (elf_gnu_osabi) has_gnu_osabi : 4;
- /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
- property. */
- unsigned int has_no_copy_on_protected : 1;
- /* Whether if the bfd contains the
- GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS property. */
- unsigned int has_indirect_extern_access : 1;
- /* Irix 5 often screws up the symbol table, sorting local symbols
- after global symbols. This flag is set if the symbol table in
- this BFD appears to be screwed up. If it is, we ignore the
- sh_info field in the symbol table header, and always read all the
- symbols. */
- unsigned int bad_symtab : 1;
- /* Set if DT_FLAGS_1 has DF_1_PIE set. */
- unsigned int is_pie : 1;
- /* Information grabbed from an elf core file. */
- struct core_elf_obj_tdata *core;
- /* More information held for output ELF BFDs. */
- struct output_elf_obj_tdata *o;
- };
- #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
- #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
- #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
- #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
- #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
- #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
- #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
- #define elf_link_info(bfd) (elf_tdata(bfd) -> o->link_info)
- #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
- #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
- #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
- #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
- #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
- #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
- #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
- #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
- #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
- #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
- #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
- #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
- #define elf_eh_frame_section(bfd) \
- (elf_tdata(bfd) -> eh_frame_section)
- #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
- #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
- #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
- #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
- #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
- #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
- #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
- #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
- #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
- #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
- #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
- #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
- #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
- #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
- #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
- #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
- #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
- #define elf_known_obj_attributes_proc(bfd) \
- (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
- #define elf_other_obj_attributes_proc(bfd) \
- (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
- #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
- #define elf_has_no_copy_on_protected(bfd) \
- (elf_tdata(bfd) -> has_no_copy_on_protected)
- #define elf_has_indirect_extern_access(bfd) \
- (elf_tdata(bfd) -> has_indirect_extern_access)
- extern void _bfd_elf_swap_verdef_in
- (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
- extern void _bfd_elf_swap_verdef_out
- (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
- extern void _bfd_elf_swap_verdaux_in
- (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
- extern void _bfd_elf_swap_verdaux_out
- (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
- extern void _bfd_elf_swap_verneed_in
- (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
- extern void _bfd_elf_swap_verneed_out
- (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
- extern void _bfd_elf_swap_vernaux_in
- (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
- extern void _bfd_elf_swap_vernaux_out
- (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
- extern void _bfd_elf_swap_versym_in
- (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
- extern void _bfd_elf_swap_versym_out
- (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
- extern unsigned int _bfd_elf_section_from_bfd_section
- (bfd *, asection *);
- extern char *bfd_elf_string_from_elf_section
- (bfd *, unsigned, unsigned);
- extern Elf_Internal_Sym *bfd_elf_get_elf_syms
- (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
- Elf_External_Sym_Shndx *);
- extern char * bfd_elf_get_str_section (bfd *, unsigned int);
- extern const char *bfd_elf_sym_name
- (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *);
- extern bool _bfd_elf_copy_private_bfd_data
- (bfd *, bfd *);
- extern bool _bfd_elf_print_private_bfd_data
- (bfd *, void *);
- const char * _bfd_elf_get_symbol_version_string
- (bfd *, asymbol *, bool, bool *);
- extern void bfd_elf_print_symbol
- (bfd *, void *, asymbol *, bfd_print_symbol_type);
- extern unsigned int _bfd_elf_eh_frame_address_size
- (bfd *, const asection *);
- extern bfd_byte _bfd_elf_encode_eh_address
- (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
- asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
- extern bool _bfd_elf_can_make_relative
- (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
- extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
- (const struct bfd_link_info *, const asection *,
- const Elf_Internal_Rela *);
- extern bfd_vma _bfd_elf_rela_local_sym
- (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
- extern bfd_vma _bfd_elf_rel_local_sym
- (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
- extern bfd_vma _bfd_elf_section_offset
- (bfd *, struct bfd_link_info *, asection *, bfd_vma);
- extern unsigned long bfd_elf_hash
- (const char *);
- extern unsigned long bfd_elf_gnu_hash
- (const char *);
- extern bfd_reloc_status_type bfd_elf_generic_reloc
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- extern bool bfd_elf_allocate_object
- (bfd *, size_t, enum elf_target_id);
- extern bool bfd_elf_make_object
- (bfd *);
- extern bool bfd_elf_mkcorefile
- (bfd *);
- extern bool _bfd_elf_make_section_from_shdr
- (bfd *, Elf_Internal_Shdr *, const char *, int);
- extern bool _bfd_elf_make_section_from_phdr
- (bfd *, Elf_Internal_Phdr *, int, const char *);
- extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
- (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
- extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
- (bfd *);
- extern void _bfd_elf_link_hash_table_free
- (bfd *);
- extern void _bfd_elf_link_hash_copy_indirect
- (struct bfd_link_info *, struct elf_link_hash_entry *,
- struct elf_link_hash_entry *);
- extern void _bfd_elf_link_hash_hide_symbol
- (struct bfd_link_info *, struct elf_link_hash_entry *, bool);
- extern void _bfd_elf_link_hide_symbol
- (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *);
- extern bool _bfd_elf_link_hash_fixup_symbol
- (struct bfd_link_info *, struct elf_link_hash_entry *);
- extern bool _bfd_elf_link_hash_table_init
- (struct elf_link_hash_table *, bfd *,
- struct bfd_hash_entry *(*)
- (struct bfd_hash_entry *, struct bfd_hash_table *, const char *),
- unsigned int, enum elf_target_id);
- extern bool _bfd_elf_slurp_version_tables
- (bfd *, bool);
- extern bool _bfd_elf_merge_sections
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_match_sections_by_type
- (bfd *, const asection *, bfd *, const asection *);
- extern bool bfd_elf_is_group_section
- (bfd *, const struct bfd_section *);
- extern const char *bfd_elf_group_name
- (bfd *, const struct bfd_section *);
- extern bool _bfd_elf_section_already_linked
- (bfd *, asection *, struct bfd_link_info *);
- extern void bfd_elf_set_group_contents
- (bfd *, asection *, void *);
- extern unsigned int _bfd_elf_filter_global_symbols
- (bfd *, struct bfd_link_info *, asymbol **, long);
- extern asection *_bfd_elf_check_kept_section
- (asection *, struct bfd_link_info *);
- #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
- extern void _bfd_elf_copy_link_hash_symbol_type
- (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *);
- extern bool _bfd_elf_size_group_sections
- (struct bfd_link_info *);
- extern bool _bfd_elf_fixup_group_sections
- (bfd *, asection *);
- extern bool _bfd_elf_copy_private_header_data
- (bfd *, bfd *);
- extern bool _bfd_elf_copy_private_symbol_data
- (bfd *, asymbol *, bfd *, asymbol *);
- #define _bfd_generic_init_private_section_data \
- _bfd_elf_init_private_section_data
- extern bool _bfd_elf_init_private_section_data
- (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
- extern bool _bfd_elf_copy_private_section_data
- (bfd *, asection *, bfd *, asection *);
- extern bool _bfd_elf_write_object_contents
- (bfd *);
- extern bool _bfd_elf_write_corefile_contents
- (bfd *);
- extern bool _bfd_elf_set_section_contents
- (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
- extern long _bfd_elf_get_symtab_upper_bound
- (bfd *);
- extern long _bfd_elf_canonicalize_symtab
- (bfd *, asymbol **);
- extern long _bfd_elf_get_dynamic_symtab_upper_bound
- (bfd *);
- extern long _bfd_elf_canonicalize_dynamic_symtab
- (bfd *, asymbol **);
- extern long _bfd_elf_get_synthetic_symtab
- (bfd *, long, asymbol **, long, asymbol **, asymbol **);
- extern long _bfd_elf_get_reloc_upper_bound
- (bfd *, sec_ptr);
- extern long _bfd_elf_canonicalize_reloc
- (bfd *, sec_ptr, arelent **, asymbol **);
- extern asection * _bfd_elf_get_dynamic_reloc_section
- (bfd *, asection *, bool);
- extern asection * _bfd_elf_make_dynamic_reloc_section
- (asection *, bfd *, unsigned int, bfd *, bool);
- extern long _bfd_elf_get_dynamic_reloc_upper_bound
- (bfd *);
- extern long _bfd_elf_canonicalize_dynamic_reloc
- (bfd *, arelent **, asymbol **);
- extern asymbol *_bfd_elf_make_empty_symbol
- (bfd *);
- extern void _bfd_elf_get_symbol_info
- (bfd *, asymbol *, symbol_info *);
- extern bool _bfd_elf_is_local_label_name
- (bfd *, const char *);
- extern alent *_bfd_elf_get_lineno
- (bfd *, asymbol *);
- extern bool _bfd_elf_set_arch_mach
- (bfd *, enum bfd_architecture, unsigned long);
- extern bool _bfd_elf_find_nearest_line
- (bfd *, asymbol **, asection *, bfd_vma,
- const char **, const char **, unsigned int *, unsigned int *);
- extern bool _bfd_elf_find_line
- (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
- extern bool _bfd_elf_find_inliner_info
- (bfd *, const char **, const char **, unsigned int *);
- extern asymbol *_bfd_elf_find_function
- (bfd *, asymbol **, asection *, bfd_vma, const char **, const char **);
- #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
- #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
- extern int _bfd_elf_sizeof_headers
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_new_section_hook
- (bfd *, asection *);
- extern const struct bfd_elf_special_section *_bfd_elf_get_special_section
- (const char *, const struct bfd_elf_special_section *, unsigned int);
- extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
- (bfd *, asection *);
- extern bool _bfd_elf_link_hide_sym_by_version
- (struct bfd_link_info *, struct elf_link_hash_entry *);
- /* If the target doesn't have reloc handling written yet: */
- extern bool _bfd_elf_no_info_to_howto
- (bfd *, arelent *, Elf_Internal_Rela *);
- extern bool bfd_section_from_shdr
- (bfd *, unsigned int shindex);
- extern bool bfd_section_from_phdr
- (bfd *, Elf_Internal_Phdr *, int);
- extern int _bfd_elf_symbol_from_bfd_symbol
- (bfd *, asymbol **);
- extern Elf_Internal_Sym *bfd_sym_from_r_symndx
- (struct sym_cache *, bfd *, unsigned long);
- extern asection *bfd_section_from_elf_index
- (bfd *, unsigned int);
- extern struct elf_strtab_hash * _bfd_elf_strtab_init
- (void);
- extern void _bfd_elf_strtab_free
- (struct elf_strtab_hash *);
- extern size_t _bfd_elf_strtab_add
- (struct elf_strtab_hash *, const char *, bool);
- extern void _bfd_elf_strtab_addref
- (struct elf_strtab_hash *, size_t);
- extern void _bfd_elf_strtab_delref
- (struct elf_strtab_hash *, size_t);
- extern unsigned int _bfd_elf_strtab_refcount
- (struct elf_strtab_hash *, size_t);
- extern void _bfd_elf_strtab_clear_all_refs
- (struct elf_strtab_hash *);
- extern void *_bfd_elf_strtab_save
- (struct elf_strtab_hash *);
- extern void _bfd_elf_strtab_restore
- (struct elf_strtab_hash *, void *);
- extern bfd_size_type _bfd_elf_strtab_size
- (struct elf_strtab_hash *);
- extern bfd_size_type _bfd_elf_strtab_len
- (struct elf_strtab_hash *);
- extern bfd_size_type _bfd_elf_strtab_offset
- (struct elf_strtab_hash *, size_t);
- extern const char * _bfd_elf_strtab_str
- (struct elf_strtab_hash *, size_t idx, bfd_size_type *offset);
- extern bool _bfd_elf_strtab_emit
- (bfd *, struct elf_strtab_hash *);
- extern void _bfd_elf_strtab_finalize
- (struct elf_strtab_hash *);
- extern bool bfd_elf_parse_eh_frame_entries
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_parse_eh_frame_entry
- (struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
- extern void _bfd_elf_parse_eh_frame
- (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
- extern bool _bfd_elf_end_eh_frame_parsing
- (struct bfd_link_info *info);
- extern bool _bfd_elf_discard_section_eh_frame
- (bfd *, struct bfd_link_info *, asection *,
- bool (*) (bfd_vma, void *), struct elf_reloc_cookie *);
- extern bool _bfd_elf_adjust_eh_frame_global_symbol
- (struct elf_link_hash_entry *, void *);
- extern bool _bfd_elf_discard_section_eh_frame_hdr
- (struct bfd_link_info *);
- extern bfd_vma _bfd_elf_eh_frame_section_offset
- (bfd *, struct bfd_link_info *, asection *, bfd_vma);
- extern bool _bfd_elf_write_section_eh_frame
- (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
- bool _bfd_elf_write_section_eh_frame_entry
- (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
- extern bool _bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info *);
- extern bool _bfd_elf_write_section_eh_frame_hdr
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_eh_frame_present
- (struct bfd_link_info *);
- extern bool _bfd_elf_eh_frame_entry_present
- (struct bfd_link_info *);
- extern bool _bfd_elf_maybe_strip_eh_frame_hdr
- (struct bfd_link_info *);
- extern bool _bfd_elf_hash_symbol (struct elf_link_hash_entry *);
- extern long _bfd_elf_link_lookup_local_dynindx
- (struct bfd_link_info *, bfd *, long);
- extern bool _bfd_elf_compute_section_file_positions
- (bfd *, struct bfd_link_info *);
- extern file_ptr _bfd_elf_assign_file_position_for_section
- (Elf_Internal_Shdr *, file_ptr, bool);
- extern bool _bfd_elf_modify_headers
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_validate_reloc
- (bfd *, arelent *);
- extern bool bfd_elf_record_link_assignment
- (bfd *, struct bfd_link_info *, const char *, bool,
- bool);
- extern bool bfd_elf_stack_segment_size (bfd *, struct bfd_link_info *,
- const char *, bfd_vma);
- extern bool bfd_elf_size_dynamic_sections
- (bfd *, const char *, const char *, const char *, const char *, const char *,
- const char * const *, struct bfd_link_info *, struct bfd_section **);
- extern bool bfd_elf_size_dynsym_hash_dynstr
- (bfd *, struct bfd_link_info *);
- extern bool bfd_elf_get_bfd_needed_list
- (bfd *, struct bfd_link_needed_list **);
- extern struct bfd_link_needed_list *bfd_elf_get_needed_list
- (bfd *, struct bfd_link_info *);
- extern void bfd_elf_set_dt_needed_name
- (bfd *, const char *);
- extern const char *bfd_elf_get_dt_soname
- (bfd *);
- extern void bfd_elf_set_dyn_lib_class
- (bfd *, enum dynamic_lib_link_class);
- extern int bfd_elf_get_dyn_lib_class
- (bfd *);
- extern struct bfd_link_needed_list *bfd_elf_get_runpath_list
- (bfd *, struct bfd_link_info *);
- extern int bfd_elf_discard_info
- (bfd *, struct bfd_link_info *);
- extern unsigned int _bfd_elf_default_action_discarded
- (struct bfd_section *);
- extern struct bfd_section *_bfd_elf_tls_setup
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_link_create_dynamic_sections
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_omit_section_dynsym_default
- (bfd *, struct bfd_link_info *, asection *);
- extern bool _bfd_elf_omit_section_dynsym_all
- (bfd *, struct bfd_link_info *, asection *);
- extern bool _bfd_elf_create_dynamic_sections
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_create_got_section
- (bfd *, struct bfd_link_info *);
- extern asection *_bfd_elf_section_for_symbol
- (struct elf_reloc_cookie *, unsigned long, bool);
- extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
- (bfd *, struct bfd_link_info *, asection *, const char *);
- extern void _bfd_elf_init_1_index_section
- (bfd *, struct bfd_link_info *);
- extern void _bfd_elf_init_2_index_sections
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elfcore_make_pseudosection
- (bfd *, char *, size_t, ufile_ptr);
- extern char *_bfd_elfcore_strndup
- (bfd *, char *, size_t);
- extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
- (bfd *, asection *, void *, Elf_Internal_Rela *, bool);
- extern Elf_Internal_Rela *_bfd_elf_link_info_read_relocs
- (bfd *, struct bfd_link_info *, asection *, void *, Elf_Internal_Rela *,
- bool);
- extern bool _bfd_elf_link_output_relocs
- (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
- struct elf_link_hash_entry **);
- extern bool _bfd_elf_adjust_dynamic_copy
- (struct bfd_link_info *, struct elf_link_hash_entry *, asection *);
- extern bool _bfd_elf_dynamic_symbol_p
- (struct elf_link_hash_entry *, struct bfd_link_info *, bool);
- extern bool _bfd_elf_symbol_refs_local_p
- (struct elf_link_hash_entry *, struct bfd_link_info *, bool);
- extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
- (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma);
- extern bool _bfd_elf_setup_sections
- (bfd *);
- extern struct bfd_link_hash_entry *bfd_elf_define_start_stop
- (struct bfd_link_info *, const char *, asection *);
- extern bool _bfd_elf_init_file_header (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_final_write_processing (bfd *);
- extern bfd_cleanup bfd_elf32_object_p
- (bfd *);
- extern bfd_cleanup bfd_elf32_core_file_p
- (bfd *);
- extern char *bfd_elf32_core_file_failing_command
- (bfd *);
- extern int bfd_elf32_core_file_failing_signal
- (bfd *);
- extern bool bfd_elf32_core_file_matches_executable_p
- (bfd *, bfd *);
- extern int bfd_elf32_core_file_pid
- (bfd *);
- extern bool _bfd_elf32_core_find_build_id
- (bfd *, bfd_vma);
- extern bool bfd_elf32_swap_symbol_in
- (bfd *, const void *, const void *, Elf_Internal_Sym *);
- extern void bfd_elf32_swap_symbol_out
- (bfd *, const Elf_Internal_Sym *, void *, void *);
- extern void bfd_elf32_swap_reloc_in
- (bfd *, const bfd_byte *, Elf_Internal_Rela *);
- extern void bfd_elf32_swap_reloc_out
- (bfd *, const Elf_Internal_Rela *, bfd_byte *);
- extern void bfd_elf32_swap_reloca_in
- (bfd *, const bfd_byte *, Elf_Internal_Rela *);
- extern void bfd_elf32_swap_reloca_out
- (bfd *, const Elf_Internal_Rela *, bfd_byte *);
- extern void bfd_elf32_swap_phdr_in
- (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
- extern void bfd_elf32_swap_phdr_out
- (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
- extern void bfd_elf32_swap_dyn_in
- (bfd *, const void *, Elf_Internal_Dyn *);
- extern void bfd_elf32_swap_dyn_out
- (bfd *, const Elf_Internal_Dyn *, void *);
- extern long bfd_elf32_slurp_symbol_table
- (bfd *, asymbol **, bool);
- extern bool bfd_elf32_write_shdrs_and_ehdr
- (bfd *);
- extern int bfd_elf32_write_out_phdrs
- (bfd *, const Elf_Internal_Phdr *, unsigned int);
- extern bool bfd_elf32_checksum_contents
- (bfd * , void (*) (const void *, size_t, void *), void *);
- extern void bfd_elf32_write_relocs
- (bfd *, asection *, void *);
- extern bool bfd_elf32_slurp_reloc_table
- (bfd *, asection *, asymbol **, bool);
- extern bfd_cleanup bfd_elf64_object_p
- (bfd *);
- extern bfd_cleanup bfd_elf64_core_file_p
- (bfd *);
- extern char *bfd_elf64_core_file_failing_command
- (bfd *);
- extern int bfd_elf64_core_file_failing_signal
- (bfd *);
- extern bool bfd_elf64_core_file_matches_executable_p
- (bfd *, bfd *);
- extern int bfd_elf64_core_file_pid
- (bfd *);
- extern bool _bfd_elf64_core_find_build_id
- (bfd *, bfd_vma);
- extern bool bfd_elf64_swap_symbol_in
- (bfd *, const void *, const void *, Elf_Internal_Sym *);
- extern void bfd_elf64_swap_symbol_out
- (bfd *, const Elf_Internal_Sym *, void *, void *);
- extern void bfd_elf64_swap_reloc_in
- (bfd *, const bfd_byte *, Elf_Internal_Rela *);
- extern void bfd_elf64_swap_reloc_out
- (bfd *, const Elf_Internal_Rela *, bfd_byte *);
- extern void bfd_elf64_swap_reloca_in
- (bfd *, const bfd_byte *, Elf_Internal_Rela *);
- extern void bfd_elf64_swap_reloca_out
- (bfd *, const Elf_Internal_Rela *, bfd_byte *);
- extern void bfd_elf64_swap_phdr_in
- (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
- extern void bfd_elf64_swap_phdr_out
- (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
- extern void bfd_elf64_swap_dyn_in
- (bfd *, const void *, Elf_Internal_Dyn *);
- extern void bfd_elf64_swap_dyn_out
- (bfd *, const Elf_Internal_Dyn *, void *);
- extern long bfd_elf64_slurp_symbol_table
- (bfd *, asymbol **, bool);
- extern bool bfd_elf64_write_shdrs_and_ehdr
- (bfd *);
- extern int bfd_elf64_write_out_phdrs
- (bfd *, const Elf_Internal_Phdr *, unsigned int);
- extern bool bfd_elf64_checksum_contents
- (bfd * , void (*) (const void *, size_t, void *), void *);
- extern void bfd_elf64_write_relocs
- (bfd *, asection *, void *);
- extern bool bfd_elf64_slurp_reloc_table
- (bfd *, asection *, asymbol **, bool);
- extern bool _bfd_elf_default_relocs_compatible
- (const bfd_target *, const bfd_target *);
- extern bool _bfd_elf_relocs_compatible
- (const bfd_target *, const bfd_target *);
- extern bool _bfd_elf_notice_as_needed
- (bfd *, struct bfd_link_info *, enum notice_asneeded_action);
- extern struct bfd_link_hash_entry *_bfd_elf_archive_symbol_lookup
- (bfd *, struct bfd_link_info *, const char *);
- extern bool bfd_elf_link_add_symbols
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_add_dynamic_entry
- (struct bfd_link_info *, bfd_vma, bfd_vma);
- extern bool _bfd_elf_strip_zero_sized_dynamic_sections
- (struct bfd_link_info *);
- extern int bfd_elf_add_dt_needed_tag
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_link_check_relocs
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_link_iterate_on_relocs
- (bfd *, struct bfd_link_info *,
- bool (*) (bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
- extern bool bfd_elf_link_record_dynamic_symbol
- (struct bfd_link_info *, struct elf_link_hash_entry *);
- extern int bfd_elf_link_record_local_dynamic_symbol
- (struct bfd_link_info *, bfd *, long);
- extern bool _bfd_elf_close_and_cleanup
- (bfd *);
- extern bool _bfd_elf_common_definition
- (Elf_Internal_Sym *);
- extern unsigned int _bfd_elf_common_section_index
- (asection *);
- extern asection *_bfd_elf_common_section
- (asection *);
- extern bfd_vma _bfd_elf_default_got_elt_size
- (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *,
- unsigned long);
- extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
- (bfd *, arelent *, struct bfd_symbol *, void *,
- asection *, bfd *, char **);
- extern bool bfd_elf_final_link
- (bfd *, struct bfd_link_info *);
- extern void _bfd_elf_gc_keep
- (struct bfd_link_info *info);
- extern bool bfd_elf_gc_mark_dynamic_ref_symbol
- (struct elf_link_hash_entry *h, void *inf);
- extern bool bfd_elf_gc_sections
- (bfd *, struct bfd_link_info *);
- extern bool bfd_elf_gc_record_vtinherit
- (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
- extern bool bfd_elf_gc_record_vtentry
- (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
- extern asection *_bfd_elf_gc_mark_hook
- (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *);
- extern asection *_bfd_elf_gc_mark_rsec
- (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
- struct elf_reloc_cookie *, bool *);
- extern bool _bfd_elf_gc_mark_reloc
- (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
- struct elf_reloc_cookie *);
- extern bool _bfd_elf_gc_mark_fdes
- (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn,
- struct elf_reloc_cookie *);
- extern bool _bfd_elf_gc_mark
- (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn);
- extern bool _bfd_elf_gc_mark_extra_sections
- (struct bfd_link_info *, elf_gc_mark_hook_fn);
- extern bool bfd_elf_gc_common_finalize_got_offsets
- (bfd *, struct bfd_link_info *);
- extern bool bfd_elf_gc_common_final_link
- (bfd *, struct bfd_link_info *);
- extern bool bfd_elf_reloc_symbol_deleted_p
- (bfd_vma, void *);
- extern struct elf_segment_map * _bfd_elf_make_dynamic_segment
- (bfd *, asection *);
- extern bool _bfd_elf_map_sections_to_segments
- (bfd *, struct bfd_link_info *, bool *);
- extern bool _bfd_elf_is_function_type (unsigned int);
- extern bfd_size_type _bfd_elf_maybe_function_sym (const asymbol *, asection *,
- bfd_vma *);
- extern asection *_bfd_elf_plt_get_reloc_section (bfd *, const char *);
- extern int bfd_elf_get_default_section_type (flagword);
- extern bool bfd_elf_lookup_section_flags
- (struct bfd_link_info *, struct flag_info *, asection *);
- extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section
- (bfd * abfd, asection * section);
- /* PowerPC @tls opcode transform/validate. */
- extern unsigned int _bfd_elf_ppc_at_tls_transform
- (unsigned int, unsigned int);
- /* PowerPC @tprel opcode transform/validate. */
- extern unsigned int _bfd_elf_ppc_at_tprel_transform
- (unsigned int, unsigned int);
- /* PowerPC elf_object_p tweak. */
- extern bool _bfd_elf_ppc_set_arch (bfd *);
- /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
- extern bool _bfd_elf_ppc_merge_fp_attributes
- (bfd *, struct bfd_link_info *);
- /* Return an upper bound on the number of bytes required to store a
- copy of ABFD's program header table entries. Return -1 if an error
- occurs; bfd_get_error will return an appropriate code. */
- extern long bfd_get_elf_phdr_upper_bound
- (bfd *abfd);
- /* Copy ABFD's program header table entries to *PHDRS. The entries
- will be stored as an array of Elf_Internal_Phdr structures, as
- defined in include/elf/internal.h. To find out how large the
- buffer needs to be, call bfd_get_elf_phdr_upper_bound.
- Return the number of program header table entries read, or -1 if an
- error occurs; bfd_get_error will return an appropriate code. */
- extern int bfd_get_elf_phdrs
- (bfd *abfd, void *phdrs);
- /* Exported interface for writing elf corefile notes. */
- extern char *elfcore_write_note
- (bfd *, char *, int *, const char *, int, const void *, int);
- extern char *elfcore_write_prpsinfo
- (bfd *, char *, int *, const char *, const char *);
- extern char *elfcore_write_prstatus
- (bfd *, char *, int *, long, int, const void *);
- extern char * elfcore_write_pstatus
- (bfd *, char *, int *, long, int, const void *);
- extern char *elfcore_write_prfpreg
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_prxfpreg
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_xstatereg
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_x86_segbases
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_vmx
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_vsx
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_tar
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_ppr
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_dscr
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_ebb
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_pmu
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_tm_cgpr
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_tm_cfpr
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_tm_cvmx
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_tm_cvsx
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_tm_spr
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_tm_ctar
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_tm_cppr
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_ppc_tm_cdscr
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_timer
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_todcmp
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_todpreg
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_ctrs
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_prefix
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_last_break
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_system_call
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_tdb
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_vxrs_low
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_vxrs_high
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_gs_cb
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_s390_gs_bc
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_arm_vfp
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_aarch_tls
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_aarch_hw_break
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_aarch_hw_watch
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_aarch_sve
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_aarch_pauth
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_aarch_mte
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_arc_v2
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_riscv_csr
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_gdb_tdesc
- (bfd *, char *, int *, const void *, int);
- extern char *elfcore_write_lwpstatus
- (bfd *, char *, int *, long, int, const void *);
- extern char *elfcore_write_register_note
- (bfd *, char *, int *, const char *, const void *, int);
- extern char *elfcore_write_file_note
- (bfd *, char *, int *, const void*, int);
- extern char *elfcore_write_loongarch_cpucfg
- (bfd *, char *, int *, const void*, int);
- extern char *elfcore_write_loongarch_lbt
- (bfd *, char *, int *, const void*, int);
- extern char *elfcore_write_loongarch_lsx
- (bfd *, char *, int *, const void*, int);
- extern char *elfcore_write_loongarch_lasx
- (bfd *, char *, int *, const void*, int);
- /* Internal structure which holds information to be included in the
- PRPSINFO section of Linux core files.
- This is an "internal" structure in the sense that it should be used
- to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
- function), so things like endianess shouldn't be an issue. This
- structure will eventually be converted in one of the
- `elf_external_linux_*' structures and written out to an output bfd
- by one of the functions declared below. */
- struct elf_internal_linux_prpsinfo
- {
- char pr_state; /* Numeric process state. */
- char pr_sname; /* Char for pr_state. */
- char pr_zomb; /* Zombie. */
- char pr_nice; /* Nice val. */
- unsigned long pr_flag; /* Flags. */
- unsigned int pr_uid;
- unsigned int pr_gid;
- int pr_pid, pr_ppid, pr_pgrp, pr_sid;
- char pr_fname[16 + 1]; /* Filename of executable. */
- char pr_psargs[80 + 1]; /* Initial part of arg list. */
- };
- /* Linux/most 32-bit archs. */
- extern char *elfcore_write_linux_prpsinfo32
- (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
- /* Linux/most 64-bit archs. */
- extern char *elfcore_write_linux_prpsinfo64
- (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
- extern bfd *_bfd_elf32_bfd_from_remote_memory
- (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep,
- int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type));
- extern bfd *_bfd_elf64_bfd_from_remote_memory
- (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep,
- int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type));
- extern bfd_vma bfd_elf_obj_attr_size (bfd *);
- extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma);
- extern int bfd_elf_get_obj_attr_int (bfd *, int, unsigned int);
- extern void bfd_elf_add_obj_attr_int (bfd *, int, unsigned int, unsigned int);
- #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
- bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
- extern void bfd_elf_add_obj_attr_string (bfd *, int, unsigned int, const char *);
- #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
- bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
- extern void bfd_elf_add_obj_attr_int_string (bfd *, int, unsigned int,
- unsigned int, const char *);
- #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
- bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
- (INTVAL), (STRVAL))
- extern char *_bfd_elf_attr_strdup (bfd *, const char *);
- extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
- extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, unsigned int);
- extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
- extern bool _bfd_elf_merge_object_attributes
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int);
- extern bool _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *);
- extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec);
- extern bool elf_read_notes (bfd *, file_ptr, bfd_size_type, size_t);
- extern bool _bfd_elf_parse_gnu_properties
- (bfd *, Elf_Internal_Note *);
- extern elf_property * _bfd_elf_get_property
- (bfd *, unsigned int, unsigned int);
- extern bfd *_bfd_elf_link_setup_gnu_properties
- (struct bfd_link_info *);
- extern bfd_size_type _bfd_elf_convert_gnu_property_size
- (bfd *, bfd *);
- extern bool _bfd_elf_convert_gnu_properties
- (bfd *, asection *, bfd *, bfd_byte **, bfd_size_type *);
- /* The linker may need to keep track of the number of relocs that it
- decides to copy as dynamic relocs in check_relocs for each symbol.
- This is so that it can later discard them if they are found to be
- unnecessary. We can store the information in a field extending the
- regular ELF linker hash table. */
- struct elf_dyn_relocs
- {
- struct elf_dyn_relocs *next;
- /* The input section of the reloc. */
- asection *sec;
- /* Total number of relocs copied for the input section. */
- bfd_size_type count;
- /* Number of pc-relative relocs copied for the input section. */
- bfd_size_type pc_count;
- };
- extern bool _bfd_elf_create_ifunc_sections
- (bfd *, struct bfd_link_info *);
- extern bool _bfd_elf_allocate_ifunc_dyn_relocs
- (struct bfd_link_info *, struct elf_link_hash_entry *,
- struct elf_dyn_relocs **, unsigned int, unsigned int,
- unsigned int, bool);
- extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *);
- extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *);
- extern bfd_vma elf64_r_info (bfd_vma, bfd_vma);
- extern bfd_vma elf64_r_sym (bfd_vma);
- extern bfd_vma elf32_r_info (bfd_vma, bfd_vma);
- extern bfd_vma elf32_r_sym (bfd_vma);
- extern bool is_debuginfo_file (bfd *);
- extern bool _bfd_elf_init_secondary_reloc_section
- (bfd *, Elf_Internal_Shdr *, const char *, unsigned int);
- extern bool _bfd_elf_slurp_secondary_reloc_section
- (bfd *, asection *, asymbol **, bool);
- extern bool _bfd_elf_copy_special_section_fields
- (const bfd *, bfd *, const Elf_Internal_Shdr *, Elf_Internal_Shdr *);
- extern bool _bfd_elf_write_secondary_reloc_section
- (bfd *, asection *);
- extern unsigned int _bfd_elf_symbol_section_index
- (bfd *, elf_symbol_type *);
- extern asection *_bfd_elf_readonly_dynrelocs
- (struct elf_link_hash_entry *);
- extern bool _bfd_elf_maybe_set_textrel
- (struct elf_link_hash_entry *, void *);
- extern bool _bfd_elf_add_dynamic_tags
- (bfd *, struct bfd_link_info *, bool);
- /* Large common section. */
- extern asection _bfd_elf_large_com_section;
- /* Hash for local symbol with the first section id, ID, in the input
- file and the local symbol index, SYM. */
- #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
- (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
- ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
- /* This is the condition under which finish_dynamic_symbol will be called.
- If our finish_dynamic_symbol isn't called, we'll need to do something
- about initializing any .plt and .got entries in relocate_section. */
- #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
- ((DYN) \
- && ((SHARED) || !(H)->forced_local) \
- && ((H)->dynindx != -1 || (H)->forced_local))
- /* This macro is to avoid lots of duplicated code in the body
- of xxx_relocate_section() in the various elfxx-xxxx.c files. */
- #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
- r_symndx, symtab_hdr, sym_hashes, \
- h, sec, relocation, \
- unresolved_reloc, warned, ignored) \
- do \
- { \
- /* It seems this can happen with erroneous or unsupported \
- input (mixing a.out and elf in an archive, for example.) */ \
- if (sym_hashes == NULL) \
- return false; \
- \
- h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
- \
- if (info->wrap_hash != NULL \
- && (input_section->flags & SEC_DEBUGGING) != 0) \
- h = ((struct elf_link_hash_entry *) \
- unwrap_hash_lookup (info, input_bfd, &h->root)); \
- \
- while (h->root.type == bfd_link_hash_indirect \
- || h->root.type == bfd_link_hash_warning) \
- h = (struct elf_link_hash_entry *) h->root.u.i.link; \
- \
- warned = false; \
- ignored = false; \
- unresolved_reloc = false; \
- relocation = 0; \
- if (h->root.type == bfd_link_hash_defined \
- || h->root.type == bfd_link_hash_defweak) \
- { \
- sec = h->root.u.def.section; \
- if (sec == NULL \
- || sec->output_section == NULL) \
- /* Set a flag that will be cleared later if we find a \
- relocation value for this symbol. output_section \
- is typically NULL for symbols satisfied by a shared \
- library. */ \
- unresolved_reloc = true; \
- else \
- relocation = (h->root.u.def.value \
- + sec->output_section->vma \
- + sec->output_offset); \
- } \
- else if (h->root.type == bfd_link_hash_undefweak) \
- ; \
- else if (info->unresolved_syms_in_objects == RM_IGNORE \
- && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
- ignored = true; \
- else if (!bfd_link_relocatable (info)) \
- { \
- bool err = ((info->unresolved_syms_in_objects == RM_DIAGNOSE \
- && !info->warn_unresolved_syms) \
- || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
- (*info->callbacks->undefined_symbol) (info, \
- h->root.root.string, \
- input_bfd, \
- input_section, \
- rel->r_offset, err); \
- warned = true; \
- } \
- (void) unresolved_reloc; \
- (void) warned; \
- (void) ignored; \
- } \
- while (0)
- /* This macro is to avoid lots of duplicated code in the body of the
- loop over relocations in xxx_relocate_section() in the various
- elfxx-xxxx.c files.
- Handle relocations against symbols from removed linkonce sections,
- or sections discarded by a linker script. When doing a relocatable
- link, we remove such relocations. Otherwise, we just want the
- section contents zeroed and avoid any special processing. */
- #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
- rel, count, relend, \
- howto, index, contents) \
- { \
- int i_; \
- _bfd_clear_contents (howto, input_bfd, input_section, \
- contents, rel[index].r_offset); \
- \
- if (bfd_link_relocatable (info) \
- && (input_section->flags & SEC_DEBUGGING)) \
- { \
- /* Only remove relocations in debug sections since other \
- sections may require relocations. */ \
- Elf_Internal_Shdr *rel_hdr; \
- \
- rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
- \
- /* Avoid empty output section. */ \
- if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
- { \
- rel_hdr->sh_size -= rel_hdr->sh_entsize; \
- rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
- rel_hdr->sh_size -= rel_hdr->sh_entsize; \
- \
- memmove (rel, rel + count, \
- (relend - rel - count) * sizeof (*rel)); \
- \
- input_section->reloc_count -= count; \
- relend -= count; \
- rel--; \
- continue; \
- } \
- } \
- \
- for (i_ = 0; i_ < count; i_++) \
- { \
- rel[i_].r_info = 0; \
- rel[i_].r_addend = 0; \
- } \
- rel += count - 1; \
- continue; \
- }
- /* Will a symbol be bound to the definition within the shared
- library, if any. A unique symbol can never be bound locally. */
- #define SYMBOLIC_BIND(INFO, H) \
- (!(H)->unique_global \
- && ((INFO)->symbolic \
- || (H)->start_stop \
- || ((INFO)->dynamic && !(H)->dynamic)))
- /* Determine if a section contains CTF data, using its name. */
- static inline bool
- bfd_section_is_ctf (const asection *sec)
- {
- const char *name = bfd_section_name (sec);
- return startswith (name, ".ctf") && (name[4] == 0 || name[4] == '.');
- }
- #ifdef __cplusplus
- }
- #endif
- #endif /* _LIBELF_H_ */
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