diff options
Diffstat (limited to 'bfd/elf-bfd.h')
| -rw-r--r-- | bfd/elf-bfd.h | 177 |
1 files changed, 162 insertions, 15 deletions
diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index 82ffe2a..577823b 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -1,5 +1,6 @@ /* BFD back-end data structures for ELF files. - Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc. + Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 1999 Free Software + Foundation, Inc. Written by Cygnus Support. This file is part of BFD, the Binary File Descriptor library. @@ -85,6 +86,16 @@ struct elf_link_hash_entry /* 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; /* String table index in .dynstr if this is a dynamic symbol. */ @@ -180,6 +191,25 @@ struct elf_link_hash_entry #define ELF_LINK_HASH_MARK 04000 }; +/* 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; +}; + /* ELF linker hash table. */ struct elf_link_hash_table @@ -208,6 +238,8 @@ struct elf_link_hash_table struct elf_link_hash_entry *hgot; /* A pointer to information used to link stabs in sections. */ PTR stab_info; + /* A linked list of local symbols to be added to .dynsym. */ + struct elf_link_local_dynamic_entry *dynlocal; }; /* Look up an entry in an ELF linker hash table. */ @@ -235,6 +267,13 @@ 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; + unsigned char arch_size, file_align; unsigned char elfclass, ev_current; int (*write_out_phdrs) PARAMS ((bfd *, const Elf_Internal_Phdr *, int)); @@ -245,6 +284,32 @@ struct elf_size_info { PARAMS ((bfd *, asection *, asymbol **, boolean)); long (*slurp_symbol_table) PARAMS ((bfd *, asymbol **, boolean)); void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *)); + void (*swap_dyn_out) PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR)); + + /* This function, if defined, 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) + PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rel *)); + + /* This function, if defined, is called to swap out a REL + relocation. */ + void (*swap_reloc_out) + PARAMS ((bfd *, const Elf_Internal_Rel *, bfd_byte *)); + + /* This function, if defined, 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) + PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); + + /* This function, if defined, is called to swap out a RELA + relocation. */ + void (*swap_reloca_out) + PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); + }; #define elf_symbol_from(ABFD,S) \ @@ -255,11 +320,6 @@ struct elf_size_info { struct elf_backend_data { - /* Whether the backend uses REL or RELA relocations. FIXME: some - ELF backends use both. When we need to support one, this whole - approach will need to be changed. */ - int use_rela_p; - /* The architecture for this backend. */ enum bfd_architecture arch; @@ -515,6 +575,12 @@ struct elf_backend_data PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o, const Elf_Internal_Rela *relocs)); + /* 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) + PARAMS ((bfd *, struct bfd_link_info *)); + /* 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; @@ -534,12 +600,30 @@ struct elf_backend_data bfd_vma got_header_size; bfd_vma plt_header_size; + /* 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; + 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 want_dynbss : 1; }; /* Information stored for each BFD section in an ELF file. This @@ -555,12 +639,19 @@ struct bfd_elf_section_data /* If there is a second reloc section associated with this section, as can happen on Irix 6, this field points to the header. */ Elf_Internal_Shdr *rel_hdr2; + /* The number of relocations currently assigned to REL_HDR. */ + unsigned int rel_count; + /* The number of relocations currently assigned to REL_HDR2. */ + unsigned int rel_count2; /* The ELF section number of this section. Only used for an output file. */ int this_idx; - /* The ELF section number of the reloc section associated with this - section, if any. Only used for an output file. */ + /* The ELF section number of the reloc section indicated by + REL_HDR if any. Only used for an output file. */ int rel_idx; + /* The ELF section number of the reloc section indicated by + REL_HDR2 if any. Only used for an output file. */ + int rel_idx2; /* Used by the backend linker to store the symbol hash table entries associated with relocs against global symbols. */ struct elf_link_hash_entry **rel_hashes; @@ -570,12 +661,15 @@ struct bfd_elf_section_data Elf_Internal_Rela *relocs; /* Used by the backend linker when generating a shared library to record the dynamic symbol index for a section symbol - corresponding to this section. */ + corresponding to this section. A value of 0 means that there is + no dynamic symbol for this section. */ long dynindx; /* A pointer used for .stab linking optimizations. */ PTR stab_info; /* A pointer available for the processor specific ELF backend. */ PTR tdata; + /* Nonzero if this section uses RELA relocations, rather than REL. */ + unsigned int use_rela_p:1; }; #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd) @@ -815,7 +909,7 @@ extern void bfd_elf_print_symbol PARAMS ((bfd *, PTR, asymbol *, #define bfd_elf32_print_symbol bfd_elf_print_symbol #define bfd_elf64_print_symbol bfd_elf_print_symbol -extern unsigned long bfd_elf_hash PARAMS ((CONST unsigned char *)); +extern unsigned long bfd_elf_hash PARAMS ((const char *)); extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *, arelent *, @@ -875,6 +969,8 @@ extern boolean _bfd_elf_find_nearest_line PARAMS ((bfd *, asection *, #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol extern int _bfd_elf_sizeof_headers PARAMS ((bfd *, boolean)); extern boolean _bfd_elf_new_section_hook PARAMS ((bfd *, asection *)); +extern boolean _bfd_elf_init_reloc_shdr + PARAMS ((bfd *, Elf_Internal_Shdr *, asection *, boolean)); /* If the target doesn't have reloc handling written yet: */ extern void _bfd_elf_no_info_to_howto PARAMS ((bfd *, arelent *, @@ -892,6 +988,9 @@ struct bfd_strtab_hash *_bfd_elf_stringtab_init PARAMS ((void)); boolean _bfd_elf_link_record_dynamic_symbol PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); +long +_bfd_elf_link_lookup_local_dynindx PARAMS ((struct bfd_link_info *, + bfd *, long)); boolean _bfd_elf_compute_section_file_positions PARAMS ((bfd *, struct bfd_link_info *)); @@ -906,6 +1005,8 @@ boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); boolean _bfd_elf_create_got_section PARAMS ((bfd *, struct bfd_link_info *)); +unsigned long _bfd_elf_link_renumber_dynsyms PARAMS ((bfd *, + struct bfd_link_info *)); elf_linker_section_t *_bfd_elf_create_linker_section PARAMS ((bfd *abfd, @@ -991,7 +1092,7 @@ extern void bfd_elf32_swap_phdr_out extern void bfd_elf32_swap_dyn_in PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *)); extern void bfd_elf32_swap_dyn_out - PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf32_External_Dyn *)); + PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR)); extern long bfd_elf32_slurp_symbol_table PARAMS ((bfd *, asymbol **, boolean)); extern boolean bfd_elf32_write_shdrs_and_ehdr PARAMS ((bfd *)); @@ -1034,7 +1135,7 @@ extern void bfd_elf64_swap_phdr_out extern void bfd_elf64_swap_dyn_in PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *)); extern void bfd_elf64_swap_dyn_out - PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf64_External_Dyn *)); + PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR)); extern long bfd_elf64_slurp_symbol_table PARAMS ((bfd *, asymbol **, boolean)); extern boolean bfd_elf64_write_shdrs_and_ehdr PARAMS ((bfd *)); @@ -1047,8 +1148,15 @@ extern boolean bfd_elf64_link_create_dynamic_sections extern Elf_Internal_Rela *_bfd_elf64_link_read_relocs PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean)); -#define bfd_elf32_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol -#define bfd_elf64_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol +#define bfd_elf32_link_record_dynamic_symbol \ + _bfd_elf_link_record_dynamic_symbol +#define bfd_elf64_link_record_dynamic_symbol \ + _bfd_elf_link_record_dynamic_symbol + +boolean _bfd_elf32_link_record_local_dynamic_symbol + PARAMS ((struct bfd_link_info *, bfd *, long)); +boolean _bfd_elf64_link_record_local_dynamic_symbol + PARAMS ((struct bfd_link_info *, bfd *, long)); extern boolean _bfd_elf_close_and_cleanup PARAMS ((bfd *)); extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn @@ -1081,7 +1189,7 @@ boolean _bfd_elf64_gc_record_vtentry extern boolean _bfd_mips_elf_object_p PARAMS ((bfd *)); extern boolean _bfd_mips_elf_section_from_shdr - PARAMS ((bfd *, Elf_Internal_Shdr *, const char *)); + PARAMS ((bfd *, Elf_Internal_Shdr *, char *)); extern boolean _bfd_mips_elf_fake_sections PARAMS ((bfd *, Elf_Internal_Shdr *, asection *)); extern boolean _bfd_mips_elf_section_from_bfd_section @@ -1110,5 +1218,44 @@ extern boolean _bfd_mips_elf_find_nearest_line const char **, unsigned int *)); extern boolean _bfd_mips_elf_set_section_contents PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type)); +extern boolean _bfd_mips_elf_create_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); +extern boolean _bfd_mips_elf_add_symbol_hook + PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, + const char **, flagword *, asection **, bfd_vma *)); +extern boolean _bfd_mips_elf_adjust_dynamic_symbol + PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); +extern boolean _bfd_mips_elf_finish_dynamic_symbol + PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, + Elf_Internal_Sym *)); +extern boolean _bfd_mips_elf_finish_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); +extern asection * _bfd_mips_elf_gc_mark_hook + PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, + struct elf_link_hash_entry *, Elf_Internal_Sym *)); +extern boolean _bfd_mips_elf_gc_sweep_hook + PARAMS ((bfd *, struct bfd_link_info *, asection *, + const Elf_Internal_Rela *)); +extern boolean _bfd_mips_elf_always_size_sections + PARAMS ((bfd *, struct bfd_link_info *)); +extern boolean _bfd_mips_elf_size_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); +extern boolean _bfd_mips_elf_check_relocs + PARAMS ((bfd *, struct bfd_link_info *, asection *, + const Elf_Internal_Rela *)); +extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create + PARAMS ((bfd *)); +extern boolean _bfd_mips_elf_print_private_bfd_data + PARAMS ((bfd *, PTR)); +extern boolean _bfd_mips_elf_link_output_symbol_hook + PARAMS ((bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, + asection *)); +extern boolean _bfd_mips_elf_final_link + PARAMS ((bfd *, struct bfd_link_info *)); +extern int _bfd_mips_elf_additional_program_headers PARAMS ((bfd *)); +extern boolean _bfd_mips_elf_modify_segment_map PARAMS ((bfd *)); +extern boolean _bfd_mips_elf_relocate_section + PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, + Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); #endif /* _LIBELF_H_ */ |