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_merge_private_bfd_data
  49 #define bfd_elf32_bfd_merge_private_bfd_data \
  50   ((boolean (*) PARAMS ((bfd *, bfd *))) bfd_true)
  51 #endif
  52 #ifndef bfd_elf32_bfd_set_private_flags
  53 #define bfd_elf32_bfd_set_private_flags \
  54   ((boolean (*) PARAMS ((bfd *, flagword))) bfd_true)
  55 #endif
  56 #ifndef bfd_elf32_bfd_is_local_label
  57 #define bfd_elf32_bfd_is_local_label bfd_generic_is_local_label
  58 #endif
  59
  60 #ifndef bfd_elf32_get_dynamic_reloc_upper_bound
  61 #define bfd_elf32_get_dynamic_reloc_upper_bound \
  62   _bfd_nodynamic_get_dynamic_reloc_upper_bound
  63 #endif
  64 #ifndef bfd_elf32_canonicalize_dynamic_reloc
  65 #define bfd_elf32_canonicalize_dynamic_reloc \
  66   _bfd_nodynamic_canonicalize_dynamic_reloc
  67 #endif
  68
  69 #ifdef elf_backend_relocate_section
  70 #ifndef bfd_elf32_bfd_link_hash_table_create
  71 #define bfd_elf32_bfd_link_hash_table_create _bfd_elf_link_hash_table_create
  72 #endif
  73 #else /* ! defined (elf_backend_relocate_section) */
  74 /* If no backend relocate_section routine, use the generic linker.  */
  75 #ifndef bfd_elf32_bfd_link_hash_table_create
  76 #define bfd_elf32_bfd_link_hash_table_create \
  77   _bfd_generic_link_hash_table_create
  78 #endif
  79 #ifndef bfd_elf32_bfd_link_add_symbols
  80 #define bfd_elf32_bfd_link_add_symbols  _bfd_generic_link_add_symbols
  81 #endif
  82 #ifndef bfd_elf32_bfd_final_link
  83 #define bfd_elf32_bfd_final_link        _bfd_generic_final_link
  84 #endif
  85 #endif /* ! defined (elf_backend_relocate_section) */
  86
  87 #ifndef elf_info_to_howto_rel
  88 #define elf_info_to_howto_rel 0
  89 #endif
  90
  91 #ifndef ELF_MAXPAGESIZE
  92 #define ELF_MAXPAGESIZE 1
  93 #endif
  94
  95 #ifndef elf_backend_collect
  96 #define elf_backend_collect false
  97 #endif
  98
  99 #ifndef elf_backend_sym_is_global
 100 #define elf_backend_sym_is_global       0
 101 #endif
 102 #ifndef elf_backend_object_p
 103 #define elf_backend_object_p            0
 104 #endif
 105 #ifndef elf_backend_symbol_processing
 106 #define elf_backend_symbol_processing   0
 107 #endif
 108 #ifndef elf_backend_symbol_table_processing
 109 #define elf_backend_symbol_table_processing     0
 110 #endif
 111 #ifndef elf_backend_section_processing
 112 #define elf_backend_section_processing  0
 113 #endif
 114 #ifndef elf_backend_section_from_shdr
 115 #define elf_backend_section_from_shdr   0
 116 #endif
 117 #ifndef elf_backend_fake_sections
 118 #define elf_backend_fake_sections       0
 119 #endif
 120 #ifndef elf_backend_section_from_bfd_section
 121 #define elf_backend_section_from_bfd_section    0
 122 #endif
 123 #ifndef elf_backend_add_symbol_hook
 124 #define elf_backend_add_symbol_hook     0
 125 #endif
 126 #ifndef elf_backend_link_output_symbol_hook
 127 #define elf_backend_link_output_symbol_hook 0
 128 #endif
 129 #ifndef elf_backend_create_dynamic_sections
 130 #define elf_backend_create_dynamic_sections 0
 131 #endif
 132 #ifndef elf_backend_check_relocs
 133 #define elf_backend_check_relocs        0
 134 #endif
 135 #ifndef elf_backend_adjust_dynamic_symbol
 136 #define elf_backend_adjust_dynamic_symbol 0
 137 #endif
 138 #ifndef elf_backend_size_dynamic_sections
 139 #define elf_backend_size_dynamic_sections 0
 140 #endif
 141 #ifndef elf_backend_relocate_section
 142 #define elf_backend_relocate_section    0
 143 #endif
 144 #ifndef elf_backend_finish_dynamic_symbol
 145 #define elf_backend_finish_dynamic_symbol       0
 146 #endif
 147 #ifndef elf_backend_finish_dynamic_sections
 148 #define elf_backend_finish_dynamic_sections     0
 149 #endif
 150 #ifndef elf_backend_begin_write_processing
 151 #define elf_backend_begin_write_processing      0
 152 #endif
 153 #ifndef elf_backend_final_write_processing
 154 #define elf_backend_final_write_processing      0
 155 #endif
 156 #ifndef elf_backend_ecoff_debug_swap
 157 #define elf_backend_ecoff_debug_swap    0
 158 #endif
 159
 160 #ifndef ELF_MACHINE_ALT1
 161 #define ELF_MACHINE_ALT1 0
 162 #endif
 163
 164 #ifndef ELF_MACHINE_ALT2
 165 #define ELF_MACHINE_ALT2 0
 166 #endif
 167
 168 static CONST struct elf_backend_data elf32_bed =
 169 {
 170 #ifdef USE_REL
 171   0,                            /* use_rela_p */
 172 #else
 173   1,                            /* use_rela_p */
 174 #endif
 175   0,                            /* elf_64_p */
 176   ELF_ARCH,                     /* arch */
 177   ELF_MACHINE_CODE,             /* elf_machine_code */
 178   ELF_MAXPAGESIZE,              /* maxpagesize */
 179   elf_backend_collect,
 180   elf_info_to_howto,
 181   elf_info_to_howto_rel,
 182   elf_backend_sym_is_global,
 183   elf_backend_object_p,
 184   elf_backend_symbol_processing,
 185   elf_backend_symbol_table_processing,
 186   elf_backend_section_processing,
 187   elf_backend_section_from_shdr,
 188   elf_backend_fake_sections,
 189   elf_backend_section_from_bfd_section,
 190   elf_backend_add_symbol_hook,
 191   elf_backend_link_output_symbol_hook,
 192   elf_backend_create_dynamic_sections,
 193   elf_backend_check_relocs,
 194   elf_backend_adjust_dynamic_symbol,
 195   elf_backend_size_dynamic_sections,
 196   elf_backend_relocate_section,
 197   elf_backend_finish_dynamic_symbol,
 198   elf_backend_finish_dynamic_sections,
 199   elf_backend_begin_write_processing,
 200   elf_backend_final_write_processing,
 201   elf_backend_ecoff_debug_swap,
 202   ELF_MACHINE_ALT1,
 203   ELF_MACHINE_ALT2
 204 };
 205
 206 #ifdef TARGET_BIG_SYM
 207 const bfd_target TARGET_BIG_SYM =
 208 {
 209   /* name: identify kind of target */
 210   TARGET_BIG_NAME,
 211
 212   /* flavour: general indication about file */
 213   bfd_target_elf_flavour,
 214
 215   /* byteorder_big_p: data is big endian */
 216   true,
 217
 218   /* header_byteorder_big_p: header is also big endian */
 219   true,
 220
 221   /* object_flags: mask of all file flags */
 222   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 223    DYNAMIC | WP_TEXT | D_PAGED),
 224
 225   /* section_flags: mask of all section flags */
 226   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 227    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 228
 229    /* leading_symbol_char: is the first char of a user symbol
 230       predictable, and if so what is it */
 231    0,
 232
 233   /* ar_pad_char: pad character for filenames within an archive header
 234      FIXME:  this really has nothing to do with ELF, this is a characteristic
 235      of the archiver and/or os and should be independently tunable */
 236   '/',
 237
 238   /* ar_max_namelen: maximum number of characters in an archive header
 239      FIXME:  this really has nothing to do with ELF, this is a characteristic
 240      of the archiver and should be independently tunable.  This value is
 241      a WAG (wild a** guess) */
 242   14,
 243
 244   /* align_power_min: minimum alignment restriction for any section
 245      FIXME:  this value may be target machine dependent */
 246   3,
 247
 248   /* Routines to byte-swap various sized integers from the data sections */
 249   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 250     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 251     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 252
 253   /* Routines to byte-swap various sized integers from the file headers */
 254   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 255     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 256     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 257
 258   /* bfd_check_format: check the format of a file being read */
 259   { _bfd_dummy_target,          /* unknown format */
 260     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 261     bfd_generic_archive_p,      /* an archive */
 262     bfd_elf32_core_file_p       /* a core file */
 263   },
 264
 265   /* bfd_set_format: set the format of a file being written */
 266   { bfd_false,
 267     bfd_elf_mkobject,
 268     _bfd_generic_mkarchive,
 269     bfd_false
 270   },
 271
 272   /* bfd_write_contents: write cached information into a file being written */
 273   { bfd_false,
 274     bfd_elf32_write_object_contents,
 275     _bfd_write_archive_contents,
 276     bfd_false
 277   },
 278
 279       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 280       BFD_JUMP_TABLE_COPY (bfd_elf32),
 281       BFD_JUMP_TABLE_CORE (bfd_elf32),
 282       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 283       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 284       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 285       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 286       BFD_JUMP_TABLE_LINK (bfd_elf32),
 287       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 288
 289   /* backend_data: */
 290   (PTR) &elf32_bed,
 291 };
 292 #endif
 293
 294 #ifdef TARGET_LITTLE_SYM
 295 const bfd_target TARGET_LITTLE_SYM =
 296 {
 297   /* name: identify kind of target */
 298   TARGET_LITTLE_NAME,
 299
 300   /* flavour: general indication about file */
 301   bfd_target_elf_flavour,
 302
 303   /* byteorder_big_p: data is big endian */
 304   false,                /* Nope -- this one's little endian */
 305
 306   /* header_byteorder_big_p: header is also big endian */
 307   false,                /* Nope -- this one's little endian */
 308
 309   /* object_flags: mask of all file flags */
 310   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 311    DYNAMIC | WP_TEXT | D_PAGED),
 312
 313   /* section_flags: mask of all section flags */
 314   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 315    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 316
 317    /* leading_symbol_char: is the first char of a user symbol
 318       predictable, and if so what is it */
 319    0,
 320
 321   /* ar_pad_char: pad character for filenames within an archive header
 322      FIXME:  this really has nothing to do with ELF, this is a characteristic
 323      of the archiver and/or os and should be independently tunable */
 324   '/',
 325
 326   /* ar_max_namelen: maximum number of characters in an archive header
 327      FIXME:  this really has nothing to do with ELF, this is a characteristic
 328      of the archiver and should be independently tunable.  This value is
 329      a WAG (wild a** guess) */
 330   14,
 331
 332   /* align_power_min: minimum alignment restriction for any section
 333      FIXME:  this value may be target machine dependent */
 334   3,
 335
 336   /* Routines to byte-swap various sized integers from the data sections */
 337   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 338     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 339     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 340
 341   /* Routines to byte-swap various sized integers from the file headers */
 342   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 343     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 344     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 345
 346   /* bfd_check_format: check the format of a file being read */
 347   { _bfd_dummy_target,          /* unknown format */
 348     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 349     bfd_generic_archive_p,      /* an archive */
 350     bfd_elf32_core_file_p       /* a core file */
 351   },
 352
 353   /* bfd_set_format: set the format of a file being written */
 354   { bfd_false,
 355     bfd_elf_mkobject,
 356     _bfd_generic_mkarchive,
 357     bfd_false
 358   },
 359
 360   /* bfd_write_contents: write cached information into a file being written */
 361   { bfd_false,
 362     bfd_elf32_write_object_contents,
 363     _bfd_write_archive_contents,
 364     bfd_false
 365   },
 366
 367       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 368       BFD_JUMP_TABLE_COPY (bfd_elf32),
 369       BFD_JUMP_TABLE_CORE (bfd_elf32),
 370       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 371       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 372       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 373       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 374       BFD_JUMP_TABLE_LINK (bfd_elf32),
 375       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 376
 377   /* backend_data: */
 378   (PTR) &elf32_bed,
 379 };
 380 #endif