250 lines
8.8 KiB
C
250 lines
8.8 KiB
C
/* BFD back-end data structures for ELF files.
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Copyright (C) 1992, 1993 Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifndef _LIBELF_H_
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#define _LIBELF_H_ 1
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#include "elf/common.h"
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#include "elf/internal.h"
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#include "elf/external.h"
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/* This CAT4 hack is to avoid a problem with some strict ANSI C preprocessors.
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The problem is, "32_" is not a valid preprocessing token, and we don't
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want extra underscores (e.g., "elf_32_"). The XCAT2 macro will cause the
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inner CAT macros to be evaluated first, producing still-valid pp-tokens.
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Then the final concatenation can be done. (Sigh.) */
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#ifdef SABER
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#define CAT4(a,b,c,d) a##b##c##d
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#else
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#ifdef __STDC__
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#define XCAT2(a,b) CAT(a,b)
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#define CAT4(a,b,c,d) XCAT2(CAT(a,b),CAT(c,d))
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#else
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#define CAT4(a,b,c,d) a/**/b/**/c/**/d
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#endif
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#endif
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/* If size isn't specified as 64 or 32, NAME macro should fail. */
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#ifndef NAME
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#if ARCH_SIZE==64
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#define NAME(x,y) CAT4(x,64,_,y)
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#endif
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#if ARCH_SIZE==32
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#define NAME(x,y) CAT4(x,32,_,y)
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#endif
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#endif
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#define ElfNAME(X) NAME(Elf,X)
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#define elfNAME(X) NAME(elf,X)
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typedef struct
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{
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asymbol symbol;
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Elf_Internal_Sym internal_elf_sym;
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/* these are used for the generation of .stabX symbols (?) */
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short desc;
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unsigned char type;
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char other;
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union
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{
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unsigned int hppa_arg_reloc;
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PTR any;
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}
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tc_data;
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Elf32_External_Sym native_elf_sym;
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} elf32_symbol_type;
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typedef struct
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{
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asymbol symbol;
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Elf_Internal_Sym internal_elf_sym;
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/* these are used for the generation of .stabX symbols (?) */
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short desc;
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unsigned char type;
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char other;
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union
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{
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unsigned int hppa_arg_reloc;
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PTR any;
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}
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tc_data;
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Elf64_External_Sym native_elf_sym;
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} elf64_symbol_type;
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/* Lacking nested functions and nested types, set up for mapping over
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BFD sections to produce ELF sections. */
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typedef struct
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{
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Elf_Internal_Ehdr * i_ehdr;
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Elf_Internal_Shdr * i_shdrp;
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struct strtab *shstrtab;
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int symtab_section;
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}
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elf_sect_thunk;
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struct elf_backend_data
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{
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int use_rela_p;
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int elf_64_p;
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enum bfd_architecture arch;
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void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
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Elf_Internal_Rela *));
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void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *,
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Elf_Internal_Rel *));
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/* @@ I really don't think this should be here. I don't know what
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global_sym is supposed to be used for, but I doubt it's something
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that would be considered global, e.g., if you've got a program
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reading and writing many BFDs. My hunch is that it's specific to
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the output BFD. If not, put a comment here explaining why. */
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/* @@ Was pointer to elfNAME(symbol_type). This makes it size-
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independent. */
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PTR global_sym;
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};
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extern boolean elf_get_sect_thunk PARAMS ((bfd *, elf_sect_thunk *));
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extern unsigned long elf_hash PARAMS ((CONST unsigned char *));
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extern bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
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extern bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
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extern boolean bfd_elf_mkobject PARAMS ((bfd *));
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extern boolean bfd_elf32_write_object_contents PARAMS ((bfd *));
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extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
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extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
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extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
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bfd *));
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extern boolean bfd_elf32_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
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file_ptr,
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bfd_size_type));
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extern unsigned int bfd_elf32_get_symtab_upper_bound PARAMS ((bfd *));
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extern unsigned int bfd_elf32_get_symtab PARAMS ((bfd *, asymbol **));
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extern unsigned int bfd_elf32_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
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extern unsigned int bfd_elf32_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
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arelent **,
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asymbol **));
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extern asymbol *bfd_elf32_make_empty_symbol PARAMS ((bfd *));
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extern void bfd_elf32_print_symbol PARAMS ((bfd *, PTR, asymbol *,
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bfd_print_symbol_type));
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extern void bfd_elf32_get_symbol_info PARAMS ((bfd *, asymbol *,
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symbol_info *));
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extern alent *bfd_elf32_get_lineno PARAMS ((bfd *, asymbol *));
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extern boolean bfd_elf32_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
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unsigned long));
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extern boolean bfd_elf32_find_nearest_line PARAMS ((bfd *, asection *,
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asymbol **,
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bfd_vma, CONST char **,
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CONST char **,
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unsigned int *));
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extern int bfd_elf32_sizeof_headers PARAMS ((bfd *, boolean));
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extern boolean bfd_elf32_new_section_hook PARAMS ((bfd *, asection *));
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/* If the target doesn't have reloc handling written yet: */
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extern void bfd_elf32_no_info_to_howto PARAMS ((bfd *, arelent *,
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Elf32_Internal_Rela *));
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extern bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
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extern bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
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extern boolean bfd_elf64_write_object_contents PARAMS ((bfd *));
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extern char *bfd_elf64_core_file_failing_command PARAMS ((bfd *));
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extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *));
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extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *,
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bfd *));
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extern boolean bfd_elf64_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
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file_ptr,
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bfd_size_type));
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extern unsigned int bfd_elf64_get_symtab_upper_bound PARAMS ((bfd *));
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extern unsigned int bfd_elf64_get_symtab PARAMS ((bfd *, asymbol **));
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extern unsigned int bfd_elf64_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
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extern unsigned int bfd_elf64_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
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arelent **,
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asymbol **));
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extern asymbol *bfd_elf64_make_empty_symbol PARAMS ((bfd *));
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extern void bfd_elf64_print_symbol PARAMS ((bfd *, PTR, asymbol *,
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bfd_print_symbol_type));
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extern void bfd_elf64_get_symbol_info PARAMS ((bfd *, asymbol *,
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symbol_info *));
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extern alent *bfd_elf64_get_lineno PARAMS ((bfd *, asymbol *));
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extern boolean bfd_elf64_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
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unsigned long));
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extern boolean bfd_elf64_find_nearest_line PARAMS ((bfd *, asection *,
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asymbol **,
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bfd_vma, CONST char **,
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CONST char **,
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unsigned int *));
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extern int bfd_elf64_sizeof_headers PARAMS ((bfd *, boolean));
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extern boolean bfd_elf64_new_section_hook PARAMS ((bfd *, asection *));
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/* If the target doesn't have reloc handling written yet: */
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extern void bfd_elf64_no_info_to_howto PARAMS ((bfd *, arelent *,
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Elf64_Internal_Rela *));
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#define get_elf_backend_data(abfd) \
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((struct elf_backend_data *) (abfd)->xvec->backend_data)
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struct strtab
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{
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char *tab;
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int nentries;
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int length;
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};
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/* Some private data is stashed away for future use using the tdata pointer
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in the bfd structure. */
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struct elf_obj_tdata
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{
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Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
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Elf_Internal_Shdr *elf_sect_ptr;
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struct strtab *strtab_ptr;
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int symtab_section;
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int num_locals;
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int num_globals;
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int *symtab_map;
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void *prstatus; /* The raw /proc prstatus structure */
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void *prpsinfo; /* The raw /proc prpsinfo structure */
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PTR raw_syms; /* Elf_External_Sym* */
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Elf_Internal_Sym *internal_syms;
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PTR symbols; /* elf_symbol_type */
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};
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#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
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#define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
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#define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
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#define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
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#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
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#define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
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#define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
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#define elf_symtab_map(bfd) (elf_tdata(bfd) -> symtab_map)
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#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
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#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
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#define obj_symbols(bfd) ((elf_symbol_type*)(elf_tdata(bfd) -> symbols))
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#define obj_raw_syms(bfd) ((Elf_External_Sym*)(elf_tdata(bfd) -> raw_syms))
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#define obj_internal_syms(bfd) (elf_tdata(bfd) -> internal_syms)
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extern char * elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned));
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extern char * elf_get_str_section PARAMS ((bfd *, unsigned));
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#define bfd_elf32_mkobject bfd_elf_mkobject
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#define bfd_elf64_mkobject bfd_elf_mkobject
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#define elf_mkobject bfd_elf_mkobject
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#endif /* _LIBELF_H_ */
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