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 #ifndef bfd_elf32_bfd_link_hash_table_create
  40 #define bfd_elf32_bfd_link_hash_table_create \
  41   _bfd_generic_link_hash_table_create
  42 #endif
  43 #ifndef bfd_elf32_bfd_link_add_symbols
  44 #define bfd_elf32_bfd_link_add_symbols  _bfd_generic_link_add_symbols
  45 #endif
  46 #ifndef bfd_elf32_bfd_final_link
  47 #define bfd_elf32_bfd_final_link        _bfd_generic_final_link
  48 #endif
  49
  50 #ifndef bfd_elf32_bfd_copy_private_section_data
  51 #define bfd_elf32_bfd_copy_private_section_data \
  52   ((boolean (*) PARAMS ((bfd *, asection *, bfd *, asection *))) bfd_true)
  53 #endif
  54 #ifndef bfd_elf32_bfd_copy_private_bfd_data
  55 #define bfd_elf32_bfd_copy_private_bfd_data \
  56   ((boolean (*) PARAMS ((bfd *, bfd *))) bfd_true)
  57 #endif
  58 #ifndef bfd_elf32_bfd_is_local_label
  59 #define bfd_elf32_bfd_is_local_label bfd_generic_is_local_label
  60 #endif
  61
  62 #ifndef elf_info_to_howto_rel
  63 #define elf_info_to_howto_rel 0
  64 #endif
  65
  66 #ifndef ELF_MAXPAGESIZE
  67 #define ELF_MAXPAGESIZE 1
  68 #endif
  69
  70 #ifndef elf_backend_sym_is_global
  71 #define elf_backend_sym_is_global       0
  72 #endif
  73 #ifndef elf_backend_object_p
  74 #define elf_backend_object_p            0
  75 #endif
  76 #ifndef elf_backend_symbol_processing
  77 #define elf_backend_symbol_processing   0
  78 #endif
  79 #ifndef elf_backend_symbol_table_processing
  80 #define elf_backend_symbol_table_processing     0
  81 #endif
  82 #ifndef elf_backend_section_processing
  83 #define elf_backend_section_processing  0
  84 #endif
  85 #ifndef elf_backend_section_from_shdr
  86 #define elf_backend_section_from_shdr   0
  87 #endif
  88 #ifndef elf_backend_fake_sections
  89 #define elf_backend_fake_sections       0
  90 #endif
  91 #ifndef elf_backend_section_from_bfd_section
  92 #define elf_backend_section_from_bfd_section    0
  93 #endif
  94 #ifndef elf_backend_final_write_processing
  95 #define elf_backend_final_write_processing      0
  96 #endif
  97 #ifndef elf_backend_ecoff_debug_swap
  98 #define elf_backend_ecoff_debug_swap    0
  99 #endif
 100
 101 static CONST struct elf_backend_data elf32_bed =
 102 {
 103 #ifdef USE_REL
 104   0,                            /* use_rela_p */
 105 #else
 106   1,                            /* use_rela_p */
 107 #endif
 108   0,                            /* elf_64_p */
 109   ELF_ARCH,                     /* arch */
 110   ELF_MACHINE_CODE,             /* elf_machine_code */
 111   ELF_MAXPAGESIZE,              /* maxpagesize */
 112   elf_info_to_howto,
 113   elf_info_to_howto_rel,
 114   elf_backend_sym_is_global,
 115   elf_backend_object_p,
 116   elf_backend_symbol_processing,
 117   elf_backend_symbol_table_processing,
 118   elf_backend_section_processing,
 119   elf_backend_section_from_shdr,
 120   elf_backend_fake_sections,
 121   elf_backend_section_from_bfd_section,
 122   elf_backend_final_write_processing,
 123   elf_backend_ecoff_debug_swap
 124 };
 125
 126 #ifdef TARGET_BIG_SYM
 127 bfd_target TARGET_BIG_SYM =
 128 {
 129   /* name: identify kind of target */
 130   TARGET_BIG_NAME,
 131
 132   /* flavour: general indication about file */
 133   bfd_target_elf_flavour,
 134
 135   /* byteorder_big_p: data is big endian */
 136   true,
 137
 138   /* header_byteorder_big_p: header is also big endian */
 139   true,
 140
 141   /* object_flags: mask of all file flags */
 142   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 143    DYNAMIC | WP_TEXT),
 144
 145   /* section_flags: mask of all section flags */
 146   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 147    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 148
 149    /* leading_symbol_char: is the first char of a user symbol
 150       predictable, and if so what is it */
 151    0,
 152
 153   /* ar_pad_char: pad character for filenames within an archive header
 154      FIXME:  this really has nothing to do with ELF, this is a characteristic
 155      of the archiver and/or os and should be independently tunable */
 156   '/',
 157
 158   /* ar_max_namelen: maximum number of characters in an archive header
 159      FIXME:  this really has nothing to do with ELF, this is a characteristic
 160      of the archiver and should be independently tunable.  This value is
 161      a WAG (wild a** guess) */
 162   15,
 163
 164   /* align_power_min: minimum alignment restriction for any section
 165      FIXME:  this value may be target machine dependent */
 166   3,
 167
 168   /* Routines to byte-swap various sized integers from the data sections */
 169   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 170     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 171     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 172
 173   /* Routines to byte-swap various sized integers from the file headers */
 174   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 175     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 176     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 177
 178   /* bfd_check_format: check the format of a file being read */
 179   { _bfd_dummy_target,          /* unknown format */
 180     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 181     bfd_generic_archive_p,      /* an archive */
 182     bfd_elf32_core_file_p       /* a core file */
 183   },
 184
 185   /* bfd_set_format: set the format of a file being written */
 186   { bfd_false,
 187     bfd_elf_mkobject,
 188     _bfd_generic_mkarchive,
 189     bfd_false
 190   },
 191
 192   /* bfd_write_contents: write cached information into a file being written */
 193   { bfd_false,
 194     bfd_elf32_write_object_contents,
 195     _bfd_write_archive_contents,
 196     bfd_false
 197   },
 198
 199       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 200       BFD_JUMP_TABLE_COPY (bfd_elf32),
 201       BFD_JUMP_TABLE_CORE (bfd_elf32),
 202       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 203       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 204       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 205       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 206       BFD_JUMP_TABLE_LINK (bfd_elf32),
 207       BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 208
 209   /* backend_data: */
 210   (PTR) &elf32_bed,
 211 };
 212 #endif
 213
 214 #ifdef TARGET_LITTLE_SYM
 215 bfd_target TARGET_LITTLE_SYM =
 216 {
 217   /* name: identify kind of target */
 218   TARGET_LITTLE_NAME,
 219
 220   /* flavour: general indication about file */
 221   bfd_target_elf_flavour,
 222
 223   /* byteorder_big_p: data is big endian */
 224   false,                /* Nope -- this one's little endian */
 225
 226   /* header_byteorder_big_p: header is also big endian */
 227   false,                /* Nope -- this one's little endian */
 228
 229   /* object_flags: mask of all file flags */
 230   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 231    DYNAMIC | WP_TEXT),
 232
 233   /* section_flags: mask of all section flags */
 234   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 235    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 236
 237    /* leading_symbol_char: is the first char of a user symbol
 238       predictable, and if so what is it */
 239    0,
 240
 241   /* ar_pad_char: pad character for filenames within an archive header
 242      FIXME:  this really has nothing to do with ELF, this is a characteristic
 243      of the archiver and/or os and should be independently tunable */
 244   '/',
 245
 246   /* ar_max_namelen: maximum number of characters in an archive header
 247      FIXME:  this really has nothing to do with ELF, this is a characteristic
 248      of the archiver and should be independently tunable.  This value is
 249      a WAG (wild a** guess) */
 250   15,
 251
 252   /* align_power_min: minimum alignment restriction for any section
 253      FIXME:  this value may be target machine dependent */
 254   3,
 255
 256   /* Routines to byte-swap various sized integers from the data sections */
 257   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 258     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 259     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 260
 261   /* Routines to byte-swap various sized integers from the file headers */
 262   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 263     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 264     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 265
 266   /* bfd_check_format: check the format of a file being read */
 267   { _bfd_dummy_target,          /* unknown format */
 268     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 269     bfd_generic_archive_p,      /* an archive */
 270     bfd_elf32_core_file_p       /* a core file */
 271   },
 272
 273   /* bfd_set_format: set the format of a file being written */
 274   { bfd_false,
 275     bfd_elf_mkobject,
 276     _bfd_generic_mkarchive,
 277     bfd_false
 278   },
 279
 280   /* bfd_write_contents: write cached information into a file being written */
 281   { bfd_false,
 282     bfd_elf32_write_object_contents,
 283     _bfd_write_archive_contents,
 284     bfd_false
 285   },
 286
 287       BFD_JUMP_TABLE_GENERIC (bfd_elf32),
 288       BFD_JUMP_TABLE_COPY (bfd_elf32),
 289       BFD_JUMP_TABLE_CORE (bfd_elf32),
 290       BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
 291       BFD_JUMP_TABLE_SYMBOLS (bfd_elf32),
 292       BFD_JUMP_TABLE_RELOCS (bfd_elf32),
 293       BFD_JUMP_TABLE_WRITE (bfd_elf32),
 294       BFD_JUMP_TABLE_LINK (bfd_elf32),
 295       BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 296
 297   /* backend_data: */
 298   (PTR) &elf32_bed,
 299 };
 300 #endif