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 #ifndef ELF_MACHINE_ALT1
 153 #define ELF_MACHINE_ALT1 0
 154 #endif
 155
 156 #ifndef ELF_MACHINE_ALT2
 157 #define ELF_MACHINE_ALT2 0
 158 #endif
 159
 160 static CONST struct elf_backend_data elf32_bed =
 161 {
 162 #ifdef USE_REL
 163   0,                            /* use_rela_p */
 164 #else
 165   1,                            /* use_rela_p */
 166 #endif
 167   0,                            /* elf_64_p */
 168   ELF_ARCH,                     /* arch */
 169   ELF_MACHINE_CODE,             /* elf_machine_code */
 170   ELF_MAXPAGESIZE,              /* maxpagesize */
 171   elf_backend_collect,
 172   elf_info_to_howto,
 173   elf_info_to_howto_rel,
 174   elf_backend_sym_is_global,
 175   elf_backend_object_p,
 176   elf_backend_symbol_processing,
 177   elf_backend_symbol_table_processing,
 178   elf_backend_section_processing,
 179   elf_backend_section_from_shdr,
 180   elf_backend_fake_sections,
 181   elf_backend_section_from_bfd_section,
 182   elf_backend_add_symbol_hook,
 183   elf_backend_link_output_symbol_hook,
 184   elf_backend_create_dynamic_sections,
 185   elf_backend_check_relocs,
 186   elf_backend_adjust_dynamic_symbol,
 187   elf_backend_size_dynamic_sections,
 188   elf_backend_relocate_section,
 189   elf_backend_finish_dynamic_symbol,
 190   elf_backend_finish_dynamic_sections,
 191   elf_backend_begin_write_processing,
 192   elf_backend_final_write_processing,
 193   elf_backend_ecoff_debug_swap,
 194   ELF_MACHINE_ALT1,
 195   ELF_MACHINE_ALT2
 196 };
 197
 198 #ifdef TARGET_BIG_SYM
 199 const bfd_target TARGET_BIG_SYM =
 200 {
 201   /* name: identify kind of target */
 202   TARGET_BIG_NAME,
 203
 204   /* flavour: general indication about file */
 205   bfd_target_elf_flavour,
 206
 207   /* byteorder_big_p: data is big endian */
 208   true,
 209
 210   /* header_byteorder_big_p: header is also big endian */
 211   true,
 212
 213   /* object_flags: mask of all file flags */
 214   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 215    DYNAMIC | WP_TEXT | D_PAGED),
 216
 217   /* section_flags: mask of all section flags */
 218   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 219    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 220
 221    /* leading_symbol_char: is the first char of a user symbol
 222       predictable, and if so what is it */
 223    0,
 224
 225   /* ar_pad_char: pad character for filenames within an archive header
 226      FIXME:  this really has nothing to do with ELF, this is a characteristic
 227      of the archiver and/or os and should be independently tunable */
 228   '/',
 229
 230   /* ar_max_namelen: maximum number of characters in an archive header
 231      FIXME:  this really has nothing to do with ELF, this is a characteristic
 232      of the archiver and should be independently tunable.  This value is
 233      a WAG (wild a** guess) */
 234   14,
 235
 236   /* align_power_min: minimum alignment restriction for any section
 237      FIXME:  this value may be target machine dependent */
 238   3,
 239
 240   /* Routines to byte-swap various sized integers from the data sections */
 241   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 242     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 243     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 244
 245   /* Routines to byte-swap various sized integers from the file headers */
 246   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 247     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 248     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 249
 250   /* bfd_check_format: check the format of a file being read */
 251   { _bfd_dummy_target,          /* unknown format */
 252     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 253     bfd_generic_archive_p,      /* an archive */
 254     bfd_elf32_core_file_p       /* a core file */
 255   },
 256
 257   /* bfd_set_format: set the format of a file being written */
 258   { bfd_false,
 259     bfd_elf_mkobject,
 260     _bfd_generic_mkarchive,
 261     bfd_false
 262   },
 263
 264   /* bfd_write_contents: write cached information into a file being written */
 265   { bfd_false,
 266     bfd_elf32_write_object_contents,
 267     _bfd_write_archive_contents,
 268     bfd_false
 269   },
 270
 271       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 272       BFD_JUMP_TABLE_COPY (bfd_elf32),
 273       BFD_JUMP_TABLE_CORE (bfd_elf32),
 274       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 275       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 276       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 277       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 278       BFD_JUMP_TABLE_LINK (bfd_elf32),
 279       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 280
 281   /* backend_data: */
 282   (PTR) &elf32_bed,
 283 };
 284 #endif
 285
 286 #ifdef TARGET_LITTLE_SYM
 287 const bfd_target TARGET_LITTLE_SYM =
 288 {
 289   /* name: identify kind of target */
 290   TARGET_LITTLE_NAME,
 291
 292   /* flavour: general indication about file */
 293   bfd_target_elf_flavour,
 294
 295   /* byteorder_big_p: data is big endian */
 296   false,                /* Nope -- this one's little endian */
 297
 298   /* header_byteorder_big_p: header is also big endian */
 299   false,                /* Nope -- this one's little endian */
 300
 301   /* object_flags: mask of all file flags */
 302   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 303    DYNAMIC | WP_TEXT | D_PAGED),
 304
 305   /* section_flags: mask of all section flags */
 306   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 307    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 308
 309    /* leading_symbol_char: is the first char of a user symbol
 310       predictable, and if so what is it */
 311    0,
 312
 313   /* ar_pad_char: pad character for filenames within an archive header
 314      FIXME:  this really has nothing to do with ELF, this is a characteristic
 315      of the archiver and/or os and should be independently tunable */
 316   '/',
 317
 318   /* ar_max_namelen: maximum number of characters in an archive header
 319      FIXME:  this really has nothing to do with ELF, this is a characteristic
 320      of the archiver and should be independently tunable.  This value is
 321      a WAG (wild a** guess) */
 322   14,
 323
 324   /* align_power_min: minimum alignment restriction for any section
 325      FIXME:  this value may be target machine dependent */
 326   3,
 327
 328   /* Routines to byte-swap various sized integers from the data sections */
 329   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 330     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 331     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 332
 333   /* Routines to byte-swap various sized integers from the file headers */
 334   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 335     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 336     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 337
 338   /* bfd_check_format: check the format of a file being read */
 339   { _bfd_dummy_target,          /* unknown format */
 340     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 341     bfd_generic_archive_p,      /* an archive */
 342     bfd_elf32_core_file_p       /* a core file */
 343   },
 344
 345   /* bfd_set_format: set the format of a file being written */
 346   { bfd_false,
 347     bfd_elf_mkobject,
 348     _bfd_generic_mkarchive,
 349     bfd_false
 350   },
 351
 352   /* bfd_write_contents: write cached information into a file being written */
 353   { bfd_false,
 354     bfd_elf32_write_object_contents,
 355     _bfd_write_archive_contents,
 356     bfd_false
 357   },
 358
 359       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 360       BFD_JUMP_TABLE_COPY (bfd_elf32),
 361       BFD_JUMP_TABLE_CORE (bfd_elf32),
 362       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 363       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 364       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 365       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 366       BFD_JUMP_TABLE_LINK (bfd_elf32),
 367       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 368
 369   /* backend_data: */
 370   (PTR) &elf32_bed,
 371 };
 372 #endif