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_create_dynamic_sections
 119 #define elf_backend_create_dynamic_sections 0
 120 #endif
 121 #ifndef elf_backend_adjust_dynamic_symbol
 122 #define elf_backend_adjust_dynamic_symbol 0
 123 #endif
 124 #ifndef elf_backend_size_dynamic_sections
 125 #define elf_backend_size_dynamic_sections 0
 126 #endif
 127 #ifndef elf_backend_relocate_section
 128 #define elf_backend_relocate_section    0
 129 #endif
 130 #ifndef elf_backend_finish_dynamic_symbol
 131 #define elf_backend_finish_dynamic_symbol       0
 132 #endif
 133 #ifndef elf_backend_finish_dynamic_sections
 134 #define elf_backend_finish_dynamic_sections     0
 135 #endif
 136 #ifndef elf_backend_begin_write_processing
 137 #define elf_backend_begin_write_processing      0
 138 #endif
 139 #ifndef elf_backend_final_write_processing
 140 #define elf_backend_final_write_processing      0
 141 #endif
 142 #ifndef elf_backend_ecoff_debug_swap
 143 #define elf_backend_ecoff_debug_swap    0
 144 #endif
 145
 146 static CONST struct elf_backend_data elf32_bed =
 147 {
 148 #ifdef USE_REL
 149   0,                            /* use_rela_p */
 150 #else
 151   1,                            /* use_rela_p */
 152 #endif
 153   0,                            /* elf_64_p */
 154   ELF_ARCH,                     /* arch */
 155   ELF_MACHINE_CODE,             /* elf_machine_code */
 156   ELF_MAXPAGESIZE,              /* maxpagesize */
 157   elf_backend_collect,
 158   elf_info_to_howto,
 159   elf_info_to_howto_rel,
 160   elf_backend_sym_is_global,
 161   elf_backend_object_p,
 162   elf_backend_symbol_processing,
 163   elf_backend_symbol_table_processing,
 164   elf_backend_section_processing,
 165   elf_backend_section_from_shdr,
 166   elf_backend_fake_sections,
 167   elf_backend_section_from_bfd_section,
 168   elf_backend_add_symbol_hook,
 169   elf_backend_create_dynamic_sections,
 170   elf_backend_adjust_dynamic_symbol,
 171   elf_backend_size_dynamic_sections,
 172   elf_backend_relocate_section,
 173   elf_backend_finish_dynamic_symbol,
 174   elf_backend_finish_dynamic_sections,
 175   elf_backend_begin_write_processing,
 176   elf_backend_final_write_processing,
 177   elf_backend_ecoff_debug_swap
 178 };
 179
 180 #ifdef TARGET_BIG_SYM
 181 const bfd_target TARGET_BIG_SYM =
 182 {
 183   /* name: identify kind of target */
 184   TARGET_BIG_NAME,
 185
 186   /* flavour: general indication about file */
 187   bfd_target_elf_flavour,
 188
 189   /* byteorder_big_p: data is big endian */
 190   true,
 191
 192   /* header_byteorder_big_p: header is also big endian */
 193   true,
 194
 195   /* object_flags: mask of all file flags */
 196   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 197    DYNAMIC | WP_TEXT | D_PAGED),
 198
 199   /* section_flags: mask of all section flags */
 200   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 201    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 202
 203    /* leading_symbol_char: is the first char of a user symbol
 204       predictable, and if so what is it */
 205    0,
 206
 207   /* ar_pad_char: pad character for filenames within an archive header
 208      FIXME:  this really has nothing to do with ELF, this is a characteristic
 209      of the archiver and/or os and should be independently tunable */
 210   '/',
 211
 212   /* ar_max_namelen: maximum number of characters in an archive header
 213      FIXME:  this really has nothing to do with ELF, this is a characteristic
 214      of the archiver and should be independently tunable.  This value is
 215      a WAG (wild a** guess) */
 216   14,
 217
 218   /* align_power_min: minimum alignment restriction for any section
 219      FIXME:  this value may be target machine dependent */
 220   3,
 221
 222   /* Routines to byte-swap various sized integers from the data sections */
 223   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 224     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 225     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 226
 227   /* Routines to byte-swap various sized integers from the file headers */
 228   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 229     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 230     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 231
 232   /* bfd_check_format: check the format of a file being read */
 233   { _bfd_dummy_target,          /* unknown format */
 234     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 235     bfd_generic_archive_p,      /* an archive */
 236     bfd_elf32_core_file_p       /* a core file */
 237   },
 238
 239   /* bfd_set_format: set the format of a file being written */
 240   { bfd_false,
 241     bfd_elf_mkobject,
 242     _bfd_generic_mkarchive,
 243     bfd_false
 244   },
 245
 246   /* bfd_write_contents: write cached information into a file being written */
 247   { bfd_false,
 248     bfd_elf32_write_object_contents,
 249     _bfd_write_archive_contents,
 250     bfd_false
 251   },
 252
 253       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 254       BFD_JUMP_TABLE_COPY (bfd_elf32),
 255       BFD_JUMP_TABLE_CORE (bfd_elf32),
 256       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 257       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 258       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 259       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 260       BFD_JUMP_TABLE_LINK (bfd_elf32),
 261       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 262
 263   /* backend_data: */
 264   (PTR) &elf32_bed,
 265 };
 266 #endif
 267
 268 #ifdef TARGET_LITTLE_SYM
 269 const bfd_target TARGET_LITTLE_SYM =
 270 {
 271   /* name: identify kind of target */
 272   TARGET_LITTLE_NAME,
 273
 274   /* flavour: general indication about file */
 275   bfd_target_elf_flavour,
 276
 277   /* byteorder_big_p: data is big endian */
 278   false,                /* Nope -- this one's little endian */
 279
 280   /* header_byteorder_big_p: header is also big endian */
 281   false,                /* Nope -- this one's little endian */
 282
 283   /* object_flags: mask of all file flags */
 284   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 285    DYNAMIC | WP_TEXT | D_PAGED),
 286
 287   /* section_flags: mask of all section flags */
 288   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 289    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 290
 291    /* leading_symbol_char: is the first char of a user symbol
 292       predictable, and if so what is it */
 293    0,
 294
 295   /* ar_pad_char: pad character for filenames within an archive header
 296      FIXME:  this really has nothing to do with ELF, this is a characteristic
 297      of the archiver and/or os and should be independently tunable */
 298   '/',
 299
 300   /* ar_max_namelen: maximum number of characters in an archive header
 301      FIXME:  this really has nothing to do with ELF, this is a characteristic
 302      of the archiver and should be independently tunable.  This value is
 303      a WAG (wild a** guess) */
 304   14,
 305
 306   /* align_power_min: minimum alignment restriction for any section
 307      FIXME:  this value may be target machine dependent */
 308   3,
 309
 310   /* Routines to byte-swap various sized integers from the data sections */
 311   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 312     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 313     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 314
 315   /* Routines to byte-swap various sized integers from the file headers */
 316   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 317     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 318     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 319
 320   /* bfd_check_format: check the format of a file being read */
 321   { _bfd_dummy_target,          /* unknown format */
 322     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 323     bfd_generic_archive_p,      /* an archive */
 324     bfd_elf32_core_file_p       /* a core file */
 325   },
 326
 327   /* bfd_set_format: set the format of a file being written */
 328   { bfd_false,
 329     bfd_elf_mkobject,
 330     _bfd_generic_mkarchive,
 331     bfd_false
 332   },
 333
 334   /* bfd_write_contents: write cached information into a file being written */
 335   { bfd_false,
 336     bfd_elf32_write_object_contents,
 337     _bfd_write_archive_contents,
 338     bfd_false
 339   },
 340
 341       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 342       BFD_JUMP_TABLE_COPY (bfd_elf32),
 343       BFD_JUMP_TABLE_CORE (bfd_elf32),
 344       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 345       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 346       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 347       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 348       BFD_JUMP_TABLE_LINK (bfd_elf32),
 349       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 350
 351   /* backend_data: */
 352   (PTR) &elf32_bed,
 353 };
 354 #endif