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_relocate_section
 119 #define elf_backend_relocate_section    0
 120 #endif
 121 #ifndef elf_backend_begin_write_processing
 122 #define elf_backend_begin_write_processing      0
 123 #endif
 124 #ifndef elf_backend_final_write_processing
 125 #define elf_backend_final_write_processing      0
 126 #endif
 127 #ifndef elf_backend_ecoff_debug_swap
 128 #define elf_backend_ecoff_debug_swap    0
 129 #endif
 130
 131 static CONST struct elf_backend_data elf32_bed =
 132 {
 133 #ifdef USE_REL
 134   0,                            /* use_rela_p */
 135 #else
 136   1,                            /* use_rela_p */
 137 #endif
 138   0,                            /* elf_64_p */
 139   ELF_ARCH,                     /* arch */
 140   ELF_MACHINE_CODE,             /* elf_machine_code */
 141   ELF_MAXPAGESIZE,              /* maxpagesize */
 142   elf_backend_collect,
 143   elf_info_to_howto,
 144   elf_info_to_howto_rel,
 145   elf_backend_sym_is_global,
 146   elf_backend_object_p,
 147   elf_backend_symbol_processing,
 148   elf_backend_symbol_table_processing,
 149   elf_backend_section_processing,
 150   elf_backend_section_from_shdr,
 151   elf_backend_fake_sections,
 152   elf_backend_section_from_bfd_section,
 153   elf_backend_add_symbol_hook,
 154   elf_backend_relocate_section,
 155   elf_backend_begin_write_processing,
 156   elf_backend_final_write_processing,
 157   elf_backend_ecoff_debug_swap
 158 };
 159
 160 #ifdef TARGET_BIG_SYM
 161 bfd_target TARGET_BIG_SYM =
 162 {
 163   /* name: identify kind of target */
 164   TARGET_BIG_NAME,
 165
 166   /* flavour: general indication about file */
 167   bfd_target_elf_flavour,
 168
 169   /* byteorder_big_p: data is big endian */
 170   true,
 171
 172   /* header_byteorder_big_p: header is also big endian */
 173   true,
 174
 175   /* object_flags: mask of all file flags */
 176   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 177    DYNAMIC | WP_TEXT),
 178
 179   /* section_flags: mask of all section flags */
 180   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 181    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 182
 183    /* leading_symbol_char: is the first char of a user symbol
 184       predictable, and if so what is it */
 185    0,
 186
 187   /* ar_pad_char: pad character for filenames within an archive header
 188      FIXME:  this really has nothing to do with ELF, this is a characteristic
 189      of the archiver and/or os and should be independently tunable */
 190   '/',
 191
 192   /* ar_max_namelen: maximum number of characters in an archive header
 193      FIXME:  this really has nothing to do with ELF, this is a characteristic
 194      of the archiver and should be independently tunable.  This value is
 195      a WAG (wild a** guess) */
 196   15,
 197
 198   /* align_power_min: minimum alignment restriction for any section
 199      FIXME:  this value may be target machine dependent */
 200   3,
 201
 202   /* Routines to byte-swap various sized integers from the data sections */
 203   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 204     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 205     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 206
 207   /* Routines to byte-swap various sized integers from the file headers */
 208   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 209     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 210     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 211
 212   /* bfd_check_format: check the format of a file being read */
 213   { _bfd_dummy_target,          /* unknown format */
 214     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 215     bfd_generic_archive_p,      /* an archive */
 216     bfd_elf32_core_file_p       /* a core file */
 217   },
 218
 219   /* bfd_set_format: set the format of a file being written */
 220   { bfd_false,
 221     bfd_elf_mkobject,
 222     _bfd_generic_mkarchive,
 223     bfd_false
 224   },
 225
 226   /* bfd_write_contents: write cached information into a file being written */
 227   { bfd_false,
 228     bfd_elf32_write_object_contents,
 229     _bfd_write_archive_contents,
 230     bfd_false
 231   },
 232
 233       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 234       BFD_JUMP_TABLE_COPY (bfd_elf32),
 235       BFD_JUMP_TABLE_CORE (bfd_elf32),
 236       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 237       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 238       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 239       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 240       BFD_JUMP_TABLE_LINK (bfd_elf32),
 241       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 242
 243   /* backend_data: */
 244   (PTR) &elf32_bed,
 245 };
 246 #endif
 247
 248 #ifdef TARGET_LITTLE_SYM
 249 bfd_target TARGET_LITTLE_SYM =
 250 {
 251   /* name: identify kind of target */
 252   TARGET_LITTLE_NAME,
 253
 254   /* flavour: general indication about file */
 255   bfd_target_elf_flavour,
 256
 257   /* byteorder_big_p: data is big endian */
 258   false,                /* Nope -- this one's little endian */
 259
 260   /* header_byteorder_big_p: header is also big endian */
 261   false,                /* Nope -- this one's little endian */
 262
 263   /* object_flags: mask of all file flags */
 264   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 265    DYNAMIC | WP_TEXT),
 266
 267   /* section_flags: mask of all section flags */
 268   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 269    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 270
 271    /* leading_symbol_char: is the first char of a user symbol
 272       predictable, and if so what is it */
 273    0,
 274
 275   /* ar_pad_char: pad character for filenames within an archive header
 276      FIXME:  this really has nothing to do with ELF, this is a characteristic
 277      of the archiver and/or os and should be independently tunable */
 278   '/',
 279
 280   /* ar_max_namelen: maximum number of characters in an archive header
 281      FIXME:  this really has nothing to do with ELF, this is a characteristic
 282      of the archiver and should be independently tunable.  This value is
 283      a WAG (wild a** guess) */
 284   15,
 285
 286   /* align_power_min: minimum alignment restriction for any section
 287      FIXME:  this value may be target machine dependent */
 288   3,
 289
 290   /* Routines to byte-swap various sized integers from the data sections */
 291   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 292     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 293     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 294
 295   /* Routines to byte-swap various sized integers from the file headers */
 296   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 297     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 298     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 299
 300   /* bfd_check_format: check the format of a file being read */
 301   { _bfd_dummy_target,          /* unknown format */
 302     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 303     bfd_generic_archive_p,      /* an archive */
 304     bfd_elf32_core_file_p       /* a core file */
 305   },
 306
 307   /* bfd_set_format: set the format of a file being written */
 308   { bfd_false,
 309     bfd_elf_mkobject,
 310     _bfd_generic_mkarchive,
 311     bfd_false
 312   },
 313
 314   /* bfd_write_contents: write cached information into a file being written */
 315   { bfd_false,
 316     bfd_elf32_write_object_contents,
 317     _bfd_write_archive_contents,
 318     bfd_false
 319   },
 320
 321       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 322       BFD_JUMP_TABLE_COPY (bfd_elf32),
 323       BFD_JUMP_TABLE_CORE (bfd_elf32),
 324       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 325       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 326       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 327       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 328       BFD_JUMP_TABLE_LINK (bfd_elf32),
 329       BFD_JUMP_TABLE_DYNAMIC (bfd_elf32),
 330
 331   /* backend_data: */
 332   (PTR) &elf32_bed,
 333 };
 334 #endif