| /* BFD back-end data structures for ELF files. |
| Copyright (C) 1992-2016 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 "elf/common.h" |
| #include "elf/external.h" |
| #include "elf/internal.h" |
| #include "bfdlink.h" |
| |
| #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; |
| bfd_boolean *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. */ |
| bfd_size_type size; |
| |
| /* 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; |
| /* 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; |
| |
| /* String table index in .dynstr if this is a dynamic symbol. */ |
| unsigned long dynstr_index; |
| |
| union |
| { |
| /* If this is a weak defined symbol from a dynamic object, this |
| field points to a defined symbol with the same value, if there is |
| one. Otherwise it is NULL. */ |
| struct elf_link_hash_entry *weakdef; |
| |
| /* Hash value of the name computed using the ELF hash function. |
| Used part way through size_dynamic_sections, after we've finished |
| with weakdefs. */ |
| 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; |
| |
| struct elf_link_virtual_table_entry *vtable; |
| }; |
| |
| /* 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) |
| |
| /* 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; |
| |
| /* 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 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 : 18; |
| } 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. */ |
| bfd_boolean 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; |
| bfd_boolean 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, |
| ARC_ELF_DATA, |
| ARM_ELF_DATA, |
| AVR_ELF_DATA, |
| BFIN_ELF_DATA, |
| CRIS_ELF_DATA, |
| FRV_ELF_DATA, |
| HPPA32_ELF_DATA, |
| HPPA64_ELF_DATA, |
| I386_ELF_DATA, |
| IA64_ELF_DATA, |
| LM32_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, |
| S390_ELF_DATA, |
| SH_ELF_DATA, |
| SPARC_ELF_DATA, |
| SPU_ELF_DATA, |
| TIC6X_ELF_DATA, |
| X86_64_ELF_DATA, |
| XTENSA_ELF_DATA, |
| XGATE_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; |
| unsigned long destshndx_index; |
| }; |
| |
| /* 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. */ |
| bfd_boolean dynamic_sections_created; |
| |
| /* True if this target has relocatable executables, so needs dynamic |
| section symbols. */ |
| bfd_boolean is_relocatable_executable; |
| |
| /* 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 number of symbol strings found in the link which must be put |
| into the .strtab section. */ |
| bfd_size_type strtabcount; |
| |
| /* 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; |
| |
| /* A linked list of BFD's loaded in the link. */ |
| struct elf_link_loaded_list *loaded; |
| |
| /* Short-cuts to get to dynamic linker sections. */ |
| asection *sgot; |
| asection *sgotplt; |
| asection *srelgot; |
| asection *splt; |
| asection *srelplt; |
| asection *igotplt; |
| asection *iplt; |
| asection *irelplt; |
| asection *irelifunc; |
| asection *dynsym; |
| }; |
| |
| /* Look up an entry in an ELF linker hash table. */ |
| |
| #define elf_link_hash_lookup(table, string, create, copy, follow) \ |
| ((struct elf_link_hash_entry *) \ |
| bfd_link_hash_lookup (&(table)->root, (string), (create), \ |
| (copy), (follow))) |
| |
| /* Traverse an ELF linker hash table. */ |
| |
| #define elf_link_hash_traverse(table, func, info) \ |
| (bfd_link_hash_traverse \ |
| (&(table)->root, \ |
| (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ |
| (info))) |
| |
| /* Get the ELF linker hash table from a link_info structure. */ |
| |
| #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash)) |
| |
| #define elf_hash_table_id(table) ((table) -> hash_table_id) |
| |
| /* Returns TRUE if the hash table is a struct elf_link_hash_table. */ |
| #define is_elf_hash_table(htab) \ |
| (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table) |
| |
| /* 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]; |
| }; |
| |
| /* 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); |
| bfd_boolean |
| (*write_shdrs_and_ehdr) (bfd *); |
| bfd_boolean (*checksum_contents) |
| (bfd * , void (*) (const void *, size_t, void *), void *); |
| void (*write_relocs) |
| (bfd *, asection *, void *); |
| bfd_boolean (*swap_symbol_in) |
| (bfd *, const void *, const void *, Elf_Internal_Sym *); |
| void (*swap_symbol_out) |
| (bfd *, const Elf_Internal_Sym *, void *, void *); |
| bfd_boolean (*slurp_reloc_table) |
| (bfd *, asection *, asymbol **, bfd_boolean); |
| long (*slurp_symbol_table) |
| (bfd *, asymbol **, bfd_boolean); |
| 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(ABFD,S) \ |
| (((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; |
| bfd_boolean 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 *); |
| |
| 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; |
| |
| /* 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 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. */ |
| void (*elf_info_to_howto) |
| (bfd *, arelent *, Elf_Internal_Rela *); |
| |
| /* A function to translate an ELF REL relocation to a BFD arelent |
| structure. */ |
| void (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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 elf_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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*elf_backend_section_processing) |
| (bfd *, Elf_Internal_Shdr *); |
| |
| /* A function to handle unusual section types when creating BFD |
| sections from ELF sections. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*elf_backend_section_flags) |
| (flagword *, 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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *); |
| |
| /* The CHECK_RELOCS function is called by the add_symbols phase of |
| the ELF backend linker. It is called once for each section with |
| relocs of an object file, just after the symbols for the object |
| file have been added to the global linker hash table. 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. */ |
| bfd_boolean (*check_relocs) |
| (bfd *abfd, struct bfd_link_info *info, asection *o, |
| const Elf_Internal_Rela *relocs); |
| |
| /* 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. */ |
| bfd_boolean (*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). */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*elf_backend_size_dynamic_sections) |
| (bfd *output_bfd, 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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. The LINKER argument is TRUE if this BFD |
| was created by the ELF backend linker. */ |
| void (*elf_backend_final_write_processing) |
| (bfd *, bfd_boolean linker); |
| |
| /* 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. */ |
| bfd_boolean (*elf_backend_modify_segment_map) |
| (bfd *, struct bfd_link_info *); |
| |
| /* This function is called to modify program headers just before |
| they are written. */ |
| bfd_boolean (*elf_backend_modify_program_headers) |
| (bfd *, struct bfd_link_info *); |
| |
| /* This function is called to see if the PHDR header should be |
| checked for validity. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*gc_mark_extra_sections) |
| (struct bfd_link_info *, elf_gc_mark_hook_fn); |
| |
| /* This function, if defined, is called during the sweep phase of gc |
| in order that a backend might update any data structures it might |
| be maintaining. */ |
| bfd_boolean (*gc_sweep_hook) |
| (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); |
| |
| /* This function, if defined, is called after the ELF headers have |
| been created. This allows for things like the OS and ABI versions |
| to be changed. */ |
| void (*elf_backend_post_process_headers) |
| (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. */ |
| bfd_boolean (*elf_backend_output_arch_local_syms) |
| (bfd *, struct bfd_link_info *, void *, |
| bfd_boolean (*) (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. */ |
| bfd_boolean (*elf_backend_output_arch_syms) |
| (bfd *, struct bfd_link_info *, void *, |
| bfd_boolean (*) (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 *, bfd_boolean); |
| |
| /* A function to do additional symbol fixup, called by |
| _bfd_elf_fix_symbol_flags. */ |
| bfd_boolean (*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 *, const Elf_Internal_Sym *, bfd_boolean, |
| bfd_boolean); |
| |
| /* 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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*sort_relocs_p) |
| (asection *); |
| |
| /* This function, if defined, is called when an NT_PRSTATUS note is found |
| in a core file. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*elf_backend_grok_psinfo) |
| (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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*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 *, 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. */ |
| bfd_boolean (*elf_backend_can_make_relative_eh_frame) |
| (bfd *, struct bfd_link_info *, asection *); |
| bfd_boolean (*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. */ |
| bfd_boolean (*elf_backend_write_section) |
| (bfd *, struct bfd_link_info *, asection *, bfd_byte *); |
| |
| /* 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) |
| (unsigned int, bfd_boolean); |
| |
| /* 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)); |
| |
| /* 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? */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*merge_symbol) (struct elf_link_hash_entry *, |
| const Elf_Internal_Sym *, asection **, |
| bfd_boolean, bfd_boolean, |
| bfd *, const asection *); |
| |
| /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
| bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *); |
| |
| /* Return TRUE if type is a function symbol type. */ |
| bfd_boolean (*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); |
| |
| /* Return the section which RELOC_SEC applies to. */ |
| asection *(*get_reloc_section) (asection *reloc_sec); |
| |
| /* 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. */ |
| bfd_boolean (*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. */ |
| bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int); |
| |
| /* 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 *); |
| |
| /* 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; |
| |
| /* 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; |
| |
| /* 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; |
| }; |
| |
| /* 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; |
| |
| /* 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_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 71 |
| |
| /* 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). */ |
| |
| 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_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) |
| |
| 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; |
| |
| /* Used to determine if PT_GNU_EH_FRAME segment header should be |
| created. */ |
| asection *eh_frame_hdr; |
| |
| /* NT_GNU_BUILD_ID note type info. */ |
| struct |
| { |
| bfd_boolean (*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; |
| |
| int num_section_syms; |
| unsigned int shstrtab_section, strtab_section; |
| |
| /* Segment flags for the PT_GNU_STACK segment. */ |
| unsigned int stack_flags; |
| |
| /* This is set to TRUE if the object was created by the backend |
| linker. */ |
| bfd_boolean linker; |
| |
| /* Used to determine if the e_flags field has been initialized */ |
| bfd_boolean flags_init; |
| }; |
| |
| /* Indicate if the bfd contains 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_symbols |
| { |
| elf_gnu_symbol_none = 0, |
| elf_gnu_symbol_any = 1 << 0, |
| elf_gnu_symbol_ifunc = (elf_gnu_symbol_any | 1 << 1), |
| elf_gnu_symbol_unique = (elf_gnu_symbol_any | 1 << 2), |
| elf_gnu_symbol_all = (elf_gnu_symbol_ifunc | elf_gnu_symbol_unique) |
| }; |
| |
| typedef struct elf_section_list |
| { |
| Elf_Internal_Shdr hdr; |
| unsigned int ndx; |
| struct elf_section_list * next; |
| } elf_section_list; |
| |
| /* 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 */ |
| |
| /* 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; |
| |
| 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; |
| int num_group; |
| |
| 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 elf_target_id object_id; |
| |
| /* 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 dynamic_lib_link_class dyn_lib_class; |
| |
| /* 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. */ |
| bfd_boolean bad_symtab; |
| |
| enum elf_gnu_symbols has_gnu_symbols; |
| |
| /* 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_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos) |
| #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr) |
| #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker) |
| #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]) |
| |
| 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 const char *bfd_elf_sym_name |
| (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *); |
| |
| extern bfd_boolean _bfd_elf_copy_private_bfd_data |
| (bfd *, bfd *); |
| extern bfd_boolean _bfd_elf_print_private_bfd_data |
| (bfd *, void *); |
| const char * _bfd_elf_get_symbol_version_string |
| (bfd *, asymbol *, bfd_boolean *); |
| extern void bfd_elf_print_symbol |
| (bfd *, void *, asymbol *, bfd_print_symbol_type); |
| |
| extern unsigned int _bfd_elf_eh_frame_address_size |
| (bfd *, 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 bfd_boolean _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 bfd_boolean bfd_elf_allocate_object |
| (bfd *, size_t, enum elf_target_id); |
| extern bfd_boolean bfd_elf_make_object |
| (bfd *); |
| extern bfd_boolean bfd_elf_mkcorefile |
| (bfd *); |
| extern bfd_boolean _bfd_elf_make_section_from_shdr |
| (bfd *, Elf_Internal_Shdr *, const char *, int); |
| extern bfd_boolean _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 *, bfd_boolean); |
| extern bfd_boolean _bfd_elf_link_hash_fixup_symbol |
| (struct bfd_link_info *, struct elf_link_hash_entry *); |
| extern bfd_boolean _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 bfd_boolean _bfd_elf_slurp_version_tables |
| (bfd *, bfd_boolean); |
| extern bfd_boolean _bfd_elf_merge_sections |
| (bfd *, struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_match_sections_by_type |
| (bfd *, const asection *, bfd *, const asection *); |
| extern bfd_boolean bfd_elf_is_group_section |
| (bfd *, const struct bfd_section *); |
| extern bfd_boolean _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 bfd_boolean _bfd_elf_size_group_sections |
| (struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_fixup_group_sections |
| (bfd *, asection *); |
| extern bfd_boolean _bfd_elf_copy_private_header_data |
| (bfd *, bfd *); |
| extern bfd_boolean _bfd_elf_copy_private_symbol_data |
| (bfd *, asymbol *, bfd *, asymbol *); |
| #define _bfd_generic_init_private_section_data \ |
| _bfd_elf_init_private_section_data |
| extern bfd_boolean _bfd_elf_init_private_section_data |
| (bfd *, asection *, bfd *, asection *, struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_copy_private_section_data |
| (bfd *, asection *, bfd *, asection *); |
| extern bfd_boolean _bfd_elf_write_object_contents |
| (bfd *); |
| extern bfd_boolean _bfd_elf_write_corefile_contents |
| (bfd *); |
| extern bfd_boolean _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 *, bfd_boolean); |
| extern asection * _bfd_elf_make_dynamic_reloc_section |
| (asection *, bfd *, unsigned int, bfd *, bfd_boolean); |
| 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 bfd_boolean _bfd_elf_is_local_label_name |
| (bfd *, const char *); |
| extern alent *_bfd_elf_get_lineno |
| (bfd *, asymbol *); |
| extern bfd_boolean _bfd_elf_set_arch_mach |
| (bfd *, enum bfd_architecture, unsigned long); |
| extern bfd_boolean _bfd_elf_find_nearest_line |
| (bfd *, asymbol **, asection *, bfd_vma, |
| const char **, const char **, unsigned int *, unsigned int *); |
| extern bfd_boolean _bfd_elf_find_line |
| (bfd *, asymbol **, asymbol *, const char **, unsigned int *); |
| extern bfd_boolean _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 bfd_boolean _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 *); |
| |
| /* If the target doesn't have reloc handling written yet: */ |
| extern void _bfd_elf_no_info_to_howto |
| (bfd *, arelent *, Elf_Internal_Rela *); |
| |
| extern bfd_boolean bfd_section_from_shdr |
| (bfd *, unsigned int shindex); |
| extern bfd_boolean 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 *, bfd_boolean); |
| 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_offset |
| (struct elf_strtab_hash *, size_t); |
| extern bfd_boolean _bfd_elf_strtab_emit |
| (bfd *, struct elf_strtab_hash *); |
| extern void _bfd_elf_strtab_finalize |
| (struct elf_strtab_hash *); |
| |
| extern bfd_boolean bfd_elf_parse_eh_frame_entries |
| (bfd *, struct bfd_link_info *); |
| extern bfd_boolean _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 bfd_boolean _bfd_elf_end_eh_frame_parsing |
| (struct bfd_link_info *info); |
| |
| extern bfd_boolean _bfd_elf_discard_section_eh_frame |
| (bfd *, struct bfd_link_info *, asection *, |
| bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *); |
| extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr |
| (bfd *, struct bfd_link_info *); |
| extern bfd_vma _bfd_elf_eh_frame_section_offset |
| (bfd *, struct bfd_link_info *, asection *, bfd_vma); |
| extern bfd_boolean _bfd_elf_write_section_eh_frame |
| (bfd *, struct bfd_link_info *, asection *, bfd_byte *); |
| bfd_boolean _bfd_elf_write_section_eh_frame_entry |
| (bfd *, struct bfd_link_info *, asection *, bfd_byte *); |
| extern bfd_boolean _bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr |
| (bfd *, struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_eh_frame_present |
| (struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_eh_frame_entry_present |
| (struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr |
| (struct bfd_link_info *); |
| |
| extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *); |
| |
| extern long _bfd_elf_link_lookup_local_dynindx |
| (struct bfd_link_info *, bfd *, long); |
| extern bfd_boolean _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, bfd_boolean); |
| |
| extern bfd_boolean _bfd_elf_validate_reloc |
| (bfd *, arelent *); |
| |
| extern bfd_boolean _bfd_elf_link_create_dynamic_sections |
| (bfd *, struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_link_omit_section_dynsym |
| (bfd *, struct bfd_link_info *, asection *); |
| extern bfd_boolean _bfd_elf_create_dynamic_sections |
| (bfd *, struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_create_got_section |
| (bfd *, struct bfd_link_info *); |
| extern asection *_bfd_elf_section_for_symbol |
| (struct elf_reloc_cookie *, unsigned long, bfd_boolean); |
| 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 bfd_boolean _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 *, bfd_boolean); |
| |
| extern bfd_boolean _bfd_elf_link_output_relocs |
| (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, |
| struct elf_link_hash_entry **); |
| |
| extern bfd_boolean _bfd_elf_adjust_dynamic_copy |
| (struct bfd_link_info *, struct elf_link_hash_entry *, asection *); |
| |
| extern bfd_boolean _bfd_elf_dynamic_symbol_p |
| (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); |
| |
| extern bfd_boolean _bfd_elf_symbol_refs_local_p |
| (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); |
| |
| extern bfd_reloc_status_type bfd_elf_perform_complex_relocation |
| (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma); |
| |
| extern bfd_boolean _bfd_elf_setup_sections |
| (bfd *); |
| |
| extern void _bfd_elf_post_process_headers (bfd * , struct bfd_link_info *); |
| |
| extern const bfd_target *bfd_elf32_object_p |
| (bfd *); |
| extern const bfd_target *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 bfd_boolean bfd_elf32_core_file_matches_executable_p |
| (bfd *, bfd *); |
| extern int bfd_elf32_core_file_pid |
| (bfd *); |
| |
| extern bfd_boolean 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 **, bfd_boolean); |
| extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr |
| (bfd *); |
| extern int bfd_elf32_write_out_phdrs |
| (bfd *, const Elf_Internal_Phdr *, unsigned int); |
| extern bfd_boolean bfd_elf32_checksum_contents |
| (bfd * , void (*) (const void *, size_t, void *), void *); |
| extern void bfd_elf32_write_relocs |
| (bfd *, asection *, void *); |
| extern bfd_boolean bfd_elf32_slurp_reloc_table |
| (bfd *, asection *, asymbol **, bfd_boolean); |
| |
| extern const bfd_target *bfd_elf64_object_p |
| (bfd *); |
| extern const bfd_target *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 bfd_boolean bfd_elf64_core_file_matches_executable_p |
| (bfd *, bfd *); |
| extern int bfd_elf64_core_file_pid |
| (bfd *); |
| |
| extern bfd_boolean 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 **, bfd_boolean); |
| extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr |
| (bfd *); |
| extern int bfd_elf64_write_out_phdrs |
| (bfd *, const Elf_Internal_Phdr *, unsigned int); |
| extern bfd_boolean bfd_elf64_checksum_contents |
| (bfd * , void (*) (const void *, size_t, void *), void *); |
| extern void bfd_elf64_write_relocs |
| (bfd *, asection *, void *); |
| extern bfd_boolean bfd_elf64_slurp_reloc_table |
| (bfd *, asection *, asymbol **, bfd_boolean); |
| |
| extern bfd_boolean _bfd_elf_default_relocs_compatible |
| (const bfd_target *, const bfd_target *); |
| |
| extern bfd_boolean _bfd_elf_relocs_compatible |
| (const bfd_target *, const bfd_target *); |
| extern bfd_boolean _bfd_elf_notice_as_needed |
| (bfd *, struct bfd_link_info *, enum notice_asneeded_action); |
| |
| extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup |
| (bfd *, struct bfd_link_info *, const char *); |
| extern bfd_boolean bfd_elf_link_add_symbols |
| (bfd *, struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_add_dynamic_entry |
| (struct bfd_link_info *, bfd_vma, bfd_vma); |
| extern bfd_boolean _bfd_elf_link_check_relocs |
| (bfd *, struct bfd_link_info *); |
| |
| extern bfd_boolean 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 bfd_boolean _bfd_elf_close_and_cleanup |
| (bfd *); |
| |
| extern bfd_boolean _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 bfd_boolean bfd_elf_final_link |
| (bfd *, struct bfd_link_info *); |
| |
| extern void _bfd_elf_gc_keep |
| (struct bfd_link_info *info); |
| |
| extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol |
| (struct elf_link_hash_entry *h, void *inf); |
| |
| extern bfd_boolean bfd_elf_gc_sections |
| (bfd *, struct bfd_link_info *); |
| |
| extern bfd_boolean bfd_elf_gc_record_vtinherit |
| (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); |
| |
| extern bfd_boolean 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 *, bfd_boolean *); |
| |
| extern bfd_boolean _bfd_elf_gc_mark_reloc |
| (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, |
| struct elf_reloc_cookie *); |
| |
| extern bfd_boolean _bfd_elf_gc_mark_fdes |
| (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn, |
| struct elf_reloc_cookie *); |
| |
| extern bfd_boolean _bfd_elf_gc_mark |
| (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn); |
| |
| extern bfd_boolean _bfd_elf_gc_mark_extra_sections |
| (struct bfd_link_info *, elf_gc_mark_hook_fn); |
| |
| extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets |
| (bfd *, struct bfd_link_info *); |
| |
| extern bfd_boolean bfd_elf_gc_common_final_link |
| (bfd *, struct bfd_link_info *); |
| |
| extern asection *_bfd_elf_is_start_stop |
| (const struct bfd_link_info *, struct elf_link_hash_entry *); |
| |
| extern bfd_boolean bfd_elf_reloc_symbol_deleted_p |
| (bfd_vma, void *); |
| |
| extern struct elf_segment_map * _bfd_elf_make_dynamic_segment |
| (bfd *, asection *); |
| |
| extern bfd_boolean _bfd_elf_map_sections_to_segments |
| (bfd *, struct bfd_link_info *); |
| |
| extern bfd_boolean _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_get_reloc_section (asection *); |
| |
| extern int bfd_elf_get_default_section_type (flagword); |
| |
| extern bfd_boolean 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 bfd_boolean _bfd_elf_ppc_set_arch (bfd *); |
| /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */ |
| extern void _bfd_elf_ppc_merge_fp_attributes (bfd *, struct bfd_link_info *); |
| |
| /* 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_ppc_vmx |
| (bfd *, char *, int *, const void *, int); |
| extern char *elfcore_write_ppc_vsx |
| (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_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_lwpstatus |
| (bfd *, char *, int *, long, int, const void *); |
| extern char *elfcore_write_register_note |
| (bfd *, char *, int *, const char *, 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 *); |
| |
| /* Linux/PPC32 uses different layout compared to most archs. */ |
| extern char *elfcore_write_ppc_linux_prpsinfo32 |
| (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 bfd_boolean _bfd_elf_merge_object_attributes |
| (bfd *, struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int); |
| extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *); |
| extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec); |
| |
| /* 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 bfd_boolean _bfd_elf_create_ifunc_sections |
| (bfd *, struct bfd_link_info *); |
| extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs |
| (struct bfd_link_info *, struct elf_link_hash_entry *, |
| struct elf_dyn_relocs **, bfd_boolean *, unsigned int, |
| unsigned int, unsigned int, bfd_boolean); |
| extern long _bfd_elf_ifunc_get_synthetic_symtab |
| (bfd *, long, asymbol **, long, asymbol **, asymbol **, asection *, |
| bfd_vma *(*) (bfd *, asymbol **, asection *, asection *)); |
| |
| 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); |
| |
| /* 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) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \ |
| ^ (SYM) ^ ((ID) >> 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)) \ |
| { \ |
| bfd_boolean err; \ |
| err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \ |
| || 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--; \ |
| 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 || ((INFO)->dynamic && !(H)->dynamic))) |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| #endif /* _LIBELF_H_ */ |
