bfd/elf32-target.h

   1 /* Target definitions for 32-bit ELF
   2    Copyright 1993, 1994 Free Software Foundation, Inc.
   3
   4 This file is part of BFD, the Binary File Descriptor library.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* This structure contains everything that BFD knows about a target.
  21    It includes things like its byte order, name, what routines to call
  22    to do various operations, etc.  Every BFD points to a target structure
  23    with its "xvec" member.
  24
  25    There are two such structures here:  one for big-endian machines and
  26    one for little-endian machines.   */
  27
  28 #define bfd_elf32_close_and_cleanup _bfd_generic_close_and_cleanup
  29 #define bfd_elf32_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
  30 #ifndef bfd_elf32_get_section_contents
  31 #define bfd_elf32_get_section_contents _bfd_generic_get_section_contents
  32 #endif
  33
  34 #define bfd_elf32_bfd_get_relocated_section_contents \
  35  bfd_generic_get_relocated_section_contents
  36 #define bfd_elf32_bfd_relax_section bfd_generic_relax_section
  37 #define bfd_elf32_bfd_make_debug_symbol \
  38   ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
  39
  40 #ifndef bfd_elf32_bfd_copy_private_section_data
  41 #define bfd_elf32_bfd_copy_private_section_data \
  42   ((boolean (*) PARAMS ((bfd *, asection *, bfd *, asection *))) bfd_true)
  43 #endif
  44 #ifndef bfd_elf32_bfd_copy_private_bfd_data
  45 #define bfd_elf32_bfd_copy_private_bfd_data \
  46   ((boolean (*) PARAMS ((bfd *, bfd *))) bfd_true)
  47 #endif
  48 #ifndef bfd_elf32_bfd_is_local_label
  49 #define bfd_elf32_bfd_is_local_label bfd_generic_is_local_label
  50 #endif
  51
  52 #ifndef bfd_elf32_get_dynamic_reloc_upper_bound
  53 #define bfd_elf32_get_dynamic_reloc_upper_bound \
  54   _bfd_nodynamic_get_dynamic_reloc_upper_bound
  55 #endif
  56 #ifndef bfd_elf32_canonicalize_dynamic_reloc
  57 #define bfd_elf32_canonicalize_dynamic_reloc \
  58   _bfd_nodynamic_canonicalize_dynamic_reloc
  59 #endif
  60
  61 #ifdef elf_backend_relocate_section
  62 #ifndef bfd_elf32_bfd_link_hash_table_create
  63 #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create
  64 #endif
  65 #else /* ! defined (elf_backend_relocate_section) */
  66 /* If no backend relocate_section routine, use the generic linker.  */
  67 #ifndef bfd_elf32_bfd_link_hash_table_create
  68 #define bfd_elf32_bfd_link_hash_table_create \
  69   _bfd_generic_link_hash_table_create
  70 #endif
  71 #ifndef bfd_elf32_bfd_link_add_symbols
  72 #define bfd_elf32_bfd_link_add_symbols  _bfd_generic_link_add_symbols
  73 #endif
  74 #ifndef bfd_elf32_bfd_final_link
  75 #define bfd_elf32_bfd_final_link        _bfd_generic_final_link
  76 #endif
  77 #endif /* ! defined (elf_backend_relocate_section) */
  78
  79 #ifndef elf_info_to_howto_rel
  80 #define elf_info_to_howto_rel 0
  81 #endif
  82
  83 #ifndef ELF_MAXPAGESIZE
  84 #define ELF_MAXPAGESIZE 1
  85 #endif
  86
  87 #ifndef elf_backend_collect
  88 #define elf_backend_collect false
  89 #endif
  90
  91 #ifndef elf_backend_sym_is_global
  92 #define elf_backend_sym_is_global       0
  93 #endif
  94 #ifndef elf_backend_object_p
  95 #define elf_backend_object_p            0
  96 #endif
  97 #ifndef elf_backend_symbol_processing
  98 #define elf_backend_symbol_processing   0
  99 #endif
 100 #ifndef elf_backend_symbol_table_processing
 101 #define elf_backend_symbol_table_processing     0
 102 #endif
 103 #ifndef elf_backend_section_processing
 104 #define elf_backend_section_processing  0
 105 #endif
 106 #ifndef elf_backend_section_from_shdr
 107 #define elf_backend_section_from_shdr   0
 108 #endif
 109 #ifndef elf_backend_fake_sections
 110 #define elf_backend_fake_sections       0
 111 #endif
 112 #ifndef elf_backend_section_from_bfd_section
 113 #define elf_backend_section_from_bfd_section    0
 114 #endif
 115 #ifndef elf_backend_add_symbol_hook
 116 #define elf_backend_add_symbol_hook     0
 117 #endif
 118 #ifndef elf_backend_link_output_symbol_hook
 119 #define elf_backend_link_output_symbol_hook 0
 120 #endif
 121 #ifndef elf_backend_create_dynamic_sections
 122 #define elf_backend_create_dynamic_sections 0
 123 #endif
 124 #ifndef elf_backend_check_relocs
 125 #define elf_backend_check_relocs        0
 126 #endif
 127 #ifndef elf_backend_adjust_dynamic_symbol
 128 #define elf_backend_adjust_dynamic_symbol 0
 129 #endif
 130 #ifndef elf_backend_size_dynamic_sections
 131 #define elf_backend_size_dynamic_sections 0
 132 #endif
 133 #ifndef elf_backend_relocate_section
 134 #define elf_backend_relocate_section    0
 135 #endif
 136 #ifndef elf_backend_finish_dynamic_symbol
 137 #define elf_backend_finish_dynamic_symbol       0
 138 #endif
 139 #ifndef elf_backend_finish_dynamic_sections
 140 #define elf_backend_finish_dynamic_sections     0
 141 #endif
 142 #ifndef elf_backend_begin_write_processing
 143 #define elf_backend_begin_write_processing      0
 144 #endif
 145 #ifndef elf_backend_final_write_processing
 146 #define elf_backend_final_write_processing      0
 147 #endif
 148 #ifndef elf_backend_ecoff_debug_swap
 149 #define elf_backend_ecoff_debug_swap    0
 150 #endif
 151
 152 static CONST struct elf_backend_data elf32_bed =
 153 {
 154 #ifdef USE_REL
 155   0,                            /* use_rela_p */
 156 #else
 157   1,                            /* use_rela_p */
 158 #endif
 159   0,                            /* elf_64_p */
 160   ELF_ARCH,                     /* arch */
 161   ELF_MACHINE_CODE,             /* elf_machine_code */
 162   ELF_MAXPAGESIZE,              /* maxpagesize */
 163   elf_backend_collect,
 164   elf_info_to_howto,
 165   elf_info_to_howto_rel,
 166   elf_backend_sym_is_global,
 167   elf_backend_object_p,
 168   elf_backend_symbol_processing,
 169   elf_backend_symbol_table_processing,
 170   elf_backend_section_processing,
 171   elf_backend_section_from_shdr,
 172   elf_backend_fake_sections,
 173   elf_backend_section_from_bfd_section,
 174   elf_backend_add_symbol_hook,
 175   elf_backend_link_output_symbol_hook,
 176   elf_backend_create_dynamic_sections,
 177   elf_backend_check_relocs,
 178   elf_backend_adjust_dynamic_symbol,
 179   elf_backend_size_dynamic_sections,
 180   elf_backend_relocate_section,
 181   elf_backend_finish_dynamic_symbol,
 182   elf_backend_finish_dynamic_sections,
 183   elf_backend_begin_write_processing,
 184   elf_backend_final_write_processing,
 185   elf_backend_ecoff_debug_swap
 186 };
 187
 188 #ifdef TARGET_BIG_SYM
 189 const bfd_target TARGET_BIG_SYM =
 190 {
 191   /* name: identify kind of target */
 192   TARGET_BIG_NAME,
 193
 194   /* flavour: general indication about file */
 195   bfd_target_elf_flavour,
 196
 197   /* byteorder_big_p: data is big endian */
 198   true,
 199
 200   /* header_byteorder_big_p: header is also big endian */
 201   true,
 202
 203   /* object_flags: mask of all file flags */
 204   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 205    DYNAMIC | WP_TEXT | D_PAGED),
 206
 207   /* section_flags: mask of all section flags */
 208   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 209    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 210
 211    /* leading_symbol_char: is the first char of a user symbol
 212       predictable, and if so what is it */
 213    0,
 214
 215   /* ar_pad_char: pad character for filenames within an archive header
 216      FIXME:  this really has nothing to do with ELF, this is a characteristic
 217      of the archiver and/or os and should be independently tunable */
 218   '/',
 219
 220   /* ar_max_namelen: maximum number of characters in an archive header
 221      FIXME:  this really has nothing to do with ELF, this is a characteristic
 222      of the archiver and should be independently tunable.  This value is
 223      a WAG (wild a** guess) */
 224   14,
 225
 226   /* align_power_min: minimum alignment restriction for any section
 227      FIXME:  this value may be target machine dependent */
 228   3,
 229
 230   /* Routines to byte-swap various sized integers from the data sections */
 231   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 232     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 233     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 234
 235   /* Routines to byte-swap various sized integers from the file headers */
 236   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 237     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 238     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 239
 240   /* bfd_check_format: check the format of a file being read */
 241   { _bfd_dummy_target,          /* unknown format */
 242     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 243     bfd_generic_archive_p,      /* an archive */
 244     bfd_elf32_core_file_p       /* a core file */
 245   },
 246
 247   /* bfd_set_format: set the format of a file being written */
 248   { bfd_false,
 249     bfd_elf_mkobject,
 250     _bfd_generic_mkarchive,
 251     bfd_false
 252   },
 253
 254   /* bfd_write_contents: write cached information into a file being written */
 255   { bfd_false,
 256     bfd_elf32_write_object_contents,
 257     _bfd_write_archive_contents,
 258     bfd_false
 259   },
 260
 261       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 262       BFD_JUMP_TABLE_COPY (bfd_elf32),
 263       BFD_JUMP_TABLE_CORE (bfd_elf32),
 264       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 265       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 266       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 267       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 268       BFD_JUMP_TABLE_LINK (bfd_elf32),
 269       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 270
 271   /* backend_data: */
 272   (PTR) &elf32_bed,
 273 };
 274 #endif
 275
 276 #ifdef TARGET_LITTLE_SYM
 277 const bfd_target TARGET_LITTLE_SYM =
 278 {
 279   /* name: identify kind of target */
 280   TARGET_LITTLE_NAME,
 281
 282   /* flavour: general indication about file */
 283   bfd_target_elf_flavour,
 284
 285   /* byteorder_big_p: data is big endian */
 286   false,                /* Nope -- this one's little endian */
 287
 288   /* header_byteorder_big_p: header is also big endian */
 289   false,                /* Nope -- this one's little endian */
 290
 291   /* object_flags: mask of all file flags */
 292   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 293    DYNAMIC | WP_TEXT | D_PAGED),
 294
 295   /* section_flags: mask of all section flags */
 296   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 297    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 298
 299    /* leading_symbol_char: is the first char of a user symbol
 300       predictable, and if so what is it */
 301    0,
 302
 303   /* ar_pad_char: pad character for filenames within an archive header
 304      FIXME:  this really has nothing to do with ELF, this is a characteristic
 305      of the archiver and/or os and should be independently tunable */
 306   '/',
 307
 308   /* ar_max_namelen: maximum number of characters in an archive header
 309      FIXME:  this really has nothing to do with ELF, this is a characteristic
 310      of the archiver and should be independently tunable.  This value is
 311      a WAG (wild a** guess) */
 312   14,
 313
 314   /* align_power_min: minimum alignment restriction for any section
 315      FIXME:  this value may be target machine dependent */
 316   3,
 317
 318   /* Routines to byte-swap various sized integers from the data sections */
 319   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 320     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 321     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 322
 323   /* Routines to byte-swap various sized integers from the file headers */
 324   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 325     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 326     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 327
 328   /* bfd_check_format: check the format of a file being read */
 329   { _bfd_dummy_target,          /* unknown format */
 330     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 331     bfd_generic_archive_p,      /* an archive */
 332     bfd_elf32_core_file_p       /* a core file */
 333   },
 334
 335   /* bfd_set_format: set the format of a file being written */
 336   { bfd_false,
 337     bfd_elf_mkobject,
 338     _bfd_generic_mkarchive,
 339     bfd_false
 340   },
 341
 342   /* bfd_write_contents: write cached information into a file being written */
 343   { bfd_false,
 344     bfd_elf32_write_object_contents,
 345     _bfd_write_archive_contents,
 346     bfd_false
 347   },
 348
 349       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 350       BFD_JUMP_TABLE_COPY (bfd_elf32),
 351       BFD_JUMP_TABLE_CORE (bfd_elf32),
 352       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 353       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 354       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 355       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 356       BFD_JUMP_TABLE_LINK (bfd_elf32),
 357       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 358
 359   /* backend_data: */
 360   (PTR) &elf32_bed,
 361 };
 362 #endif