bfd/libelf.h

   1 /* BFD back-end data structures for ELF files.
   2    Copyright (C) 1992, 1993 Free Software Foundation, Inc.
   3    Written by Cygnus Support.
   4
   5 This file is part of BFD, the Binary File Descriptor library.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 #ifndef _LIBELF_H_
  22 #define _LIBELF_H_ 1
  23
  24 #include "elf/common.h"
  25 #include "elf/internal.h"
  26 #include "elf/external.h"
  27
  28 #ifndef NAME
  29 #if ARCH_SIZE==64
  30 #define NAME(x,y) CAT3(x,64_,y)
  31 #else /* ARCH_SIZE==32 */
  32 #define NAME(x,y) CAT3(x,32_,y)
  33 #endif
  34 #endif
  35
  36 #define ElfNAME(X)      NAME(Elf,X)
  37 #define elfNAME(X)      NAME(elf,X)
  38
  39 typedef struct
  40 {
  41   asymbol symbol;
  42   ElfNAME (Internal_Sym) internal_elf_sym;
  43   ElfNAME (External_Sym) native_elf_sym;
  44   /* these are used for the generation of .stabX symbols (?) */
  45   short desc;
  46   unsigned char type;
  47   char other;
  48   union
  49     {
  50       unsigned int hppa_arg_reloc;
  51       PTR any;
  52     }
  53   tc_data;
  54 }
  55
  56 elfNAME (symbol_type);
  57
  58 /* Lacking nested functions and nested types, set up for mapping over
  59    BFD sections to produce ELF sections.  */
  60 typedef struct
  61 {
  62   ElfNAME (Internal_Ehdr) * i_ehdr;
  63   ElfNAME (Internal_Shdr) * i_shdrp;
  64   struct strtab *shstrtab;
  65   int symtab_section;
  66 }
  67
  68 elf_sect_thunk;
  69
  70 struct elfNAME(backend_data)
  71 {
  72   int use_rela_p;
  73   int elf_64_p;
  74   enum bfd_architecture arch;
  75   void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
  76                                      ElfNAME (Internal_Rela) *));
  77   void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *,
  78                                          ElfNAME (Internal_Rel) *));
  79
  80   /* @@ I really don't think this should be here.  I don't know what
  81      global_sym is supposed to be used for, but I doubt it's something
  82      that would be considered global, e.g., if you've got a program
  83      reading and writing many BFDs.  My hunch is that it's specific to
  84      the output BFD.  If not, put a comment here explaining why.  */
  85   elfNAME (symbol_type) * global_sym;
  86 };
  87
  88 extern bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
  89 extern bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
  90 extern boolean bfd_elf32_mkobject PARAMS ((bfd *));
  91 extern boolean bfd_elf32_write_object_contents PARAMS ((bfd *));
  92 extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
  93 extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
  94 extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
  95                                                                  bfd *));
  96 extern boolean bfd_elf32_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
  97                                                        file_ptr,
  98                                                        bfd_size_type));
  99
 100 extern boolean elf_get_sect_thunk PARAMS ((bfd *, elf_sect_thunk *));
 101 extern unsigned int bfd_elf32_get_symtab_upper_bound PARAMS ((bfd *));
 102 extern unsigned int bfd_elf32_get_symtab PARAMS ((bfd *, asymbol **));
 103 extern unsigned int bfd_elf32_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
 104 extern unsigned int bfd_elf32_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
 105                                                           arelent **,
 106                                                           asymbol **));
 107 extern asymbol *bfd_elf32_make_empty_symbol PARAMS ((bfd *));
 108 extern void bfd_elf32_print_symbol PARAMS ((bfd *, PTR, asymbol *,
 109                                             bfd_print_symbol_type));
 110 extern void bfd_elf32_get_symbol_info PARAMS ((bfd *, asymbol *,
 111                                                symbol_info *));
 112 extern alent *bfd_elf32_get_lineno PARAMS ((bfd *, asymbol *));
 113 extern boolean bfd_elf32_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
 114                                                 unsigned long));
 115 extern boolean bfd_elf32_find_nearest_line PARAMS ((bfd *, asection *,
 116                                                     asymbol **,
 117                                                     bfd_vma, CONST char **,
 118                                                     CONST char **,
 119                                                     unsigned int *));
 120 extern int bfd_elf32_sizeof_headers PARAMS ((bfd *, boolean));
 121 extern unsigned long elf_hash PARAMS ((CONST unsigned char *));
 122
 123 /* If the target doesn't have reloc handling written yet:  */
 124 extern void bfd_elf32_no_info_to_howto PARAMS ((bfd *, arelent *,
 125                                                 Elf32_Internal_Rela *));
 126
 127 #define get_elf_backend_data(abfd) \
 128   ((struct elfNAME (backend_data) *) (abfd)->xvec->backend_data)
 129
 130 struct strtab
 131 {
 132   char *tab;
 133   int nentries;
 134   int length;
 135 };
 136
 137 extern struct elf32_internal_shdr *
 138 bfd_elf_locate_sh PARAMS ((bfd *, struct strtab *,
 139                            struct elf32_internal_shdr *, CONST char *));
 140
 141 #endif /* _LIBELF_H_ */