bfd/elf32-target.h

   1 /* Target definitions for 32-bit ELF
   2    Copyright 1993 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 /* Archives are generic or unimplemented.  */
  29 #ifndef bfd_elf32_slurp_armap
  30 #define bfd_elf32_slurp_armap           bfd_slurp_coff_armap
  31 #endif
  32 #define bfd_elf32_slurp_extended_name_table     _bfd_slurp_extended_name_table
  33 #define bfd_elf32_truncate_arname               bfd_dont_truncate_arname
  34 #define bfd_elf32_openr_next_archived_file      bfd_generic_openr_next_archived_file
  35 #define bfd_elf32_generic_stat_arch_elt bfd_generic_stat_arch_elt
  36 #ifndef bfd_elf32_write_armap
  37 #define bfd_elf32_write_armap           coff_write_armap
  38 #endif
  39
  40 /* Ordinary section reading and writing */
  41 #define bfd_elf32_get_section_contents  bfd_generic_get_section_contents
  42 #define bfd_elf32_close_and_cleanup             bfd_generic_close_and_cleanup
  43
  44 #define bfd_elf32_bfd_debug_info_start  bfd_void
  45 #define bfd_elf32_bfd_debug_info_end    bfd_void
  46 #define bfd_elf32_bfd_debug_info_accumulate     (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
  47 #define bfd_elf32_bfd_get_relocated_section_contents \
  48  bfd_generic_get_relocated_section_contents
  49 #define bfd_elf32_bfd_relax_section bfd_generic_relax_section
  50 #define bfd_elf32_bfd_make_debug_symbol \
  51   ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
  52 #ifndef bfd_elf32_bfd_link_hash_table_create
  53 #define bfd_elf32_bfd_link_hash_table_create \
  54   _bfd_generic_link_hash_table_create
  55 #endif
  56 #ifndef bfd_elf32_bfd_link_add_symbols
  57 #define bfd_elf32_bfd_link_add_symbols  _bfd_generic_link_add_symbols
  58 #endif
  59 #ifndef bfd_elf32_bfd_final_link
  60 #define bfd_elf32_bfd_final_link        _bfd_generic_final_link
  61 #endif
  62
  63 #ifndef bfd_elf32_bfd_copy_private_section_data
  64 #define bfd_elf32_bfd_copy_private_section_data \
  65   ((boolean (*) PARAMS ((bfd *, asection *, bfd *, asection *))) bfd_true)
  66 #endif
  67 #ifndef bfd_elf32_bfd_copy_private_bfd_data
  68 #define bfd_elf32_bfd_copy_private_bfd_data \
  69   ((boolean (*) PARAMS ((bfd *, bfd *))) bfd_true)
  70 #endif
  71 #ifndef bfd_elf32_bfd_is_local_label
  72 #define bfd_elf32_bfd_is_local_label bfd_generic_is_local_label
  73 #endif
  74
  75 #ifndef elf_info_to_howto_rel
  76 #define elf_info_to_howto_rel 0
  77 #endif
  78
  79 #ifndef ELF_MAXPAGESIZE
  80 #define ELF_MAXPAGESIZE 1
  81 #endif
  82
  83 #ifndef elf_backend_sym_is_global
  84 #define elf_backend_sym_is_global       0
  85 #endif
  86 #ifndef elf_backend_object_p
  87 #define elf_backend_object_p            0
  88 #endif
  89 #ifndef elf_backend_symbol_processing
  90 #define elf_backend_symbol_processing   0
  91 #endif
  92 #ifndef elf_backend_symbol_table_processing
  93 #define elf_backend_symbol_table_processing     0
  94 #endif
  95 #ifndef elf_backend_section_processing
  96 #define elf_backend_section_processing  0
  97 #endif
  98 #ifndef elf_backend_section_from_shdr
  99 #define elf_backend_section_from_shdr   0
 100 #endif
 101 #ifndef elf_backend_fake_sections
 102 #define elf_backend_fake_sections       0
 103 #endif
 104 #ifndef elf_backend_section_from_bfd_section
 105 #define elf_backend_section_from_bfd_section    0
 106 #endif
 107 #ifndef elf_backend_final_write_processing
 108 #define elf_backend_final_write_processing      0
 109 #endif
 110 #ifndef elf_backend_ecoff_debug_swap
 111 #define elf_backend_ecoff_debug_swap    0
 112 #endif
 113
 114 static CONST struct elf_backend_data elf32_bed =
 115 {
 116 #ifdef USE_REL
 117   0,                            /* use_rela_p */
 118 #else
 119   1,                            /* use_rela_p */
 120 #endif
 121   0,                            /* elf_64_p */
 122   ELF_ARCH,                     /* arch */
 123   ELF_MACHINE_CODE,             /* elf_machine_code */
 124   ELF_MAXPAGESIZE,              /* maxpagesize */
 125   elf_info_to_howto,
 126   elf_info_to_howto_rel,
 127   elf_backend_sym_is_global,
 128   elf_backend_object_p,
 129   elf_backend_symbol_processing,
 130   elf_backend_symbol_table_processing,
 131   elf_backend_section_processing,
 132   elf_backend_section_from_shdr,
 133   elf_backend_fake_sections,
 134   elf_backend_section_from_bfd_section,
 135   elf_backend_final_write_processing,
 136   elf_backend_ecoff_debug_swap
 137 };
 138
 139 #ifdef TARGET_BIG_SYM
 140 bfd_target TARGET_BIG_SYM =
 141 {
 142   /* name: identify kind of target */
 143   TARGET_BIG_NAME,
 144
 145   /* flavour: general indication about file */
 146   bfd_target_elf_flavour,
 147
 148   /* byteorder_big_p: data is big endian */
 149   true,
 150
 151   /* header_byteorder_big_p: header is also big endian */
 152   true,
 153
 154   /* object_flags: mask of all file flags */
 155   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 156    DYNAMIC | WP_TEXT),
 157
 158   /* section_flags: mask of all section flags */
 159   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 160    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 161
 162    /* leading_symbol_char: is the first char of a user symbol
 163       predictable, and if so what is it */
 164    0,
 165
 166   /* ar_pad_char: pad character for filenames within an archive header
 167      FIXME:  this really has nothing to do with ELF, this is a characteristic
 168      of the archiver and/or os and should be independently tunable */
 169   '/',
 170
 171   /* ar_max_namelen: maximum number of characters in an archive header
 172      FIXME:  this really has nothing to do with ELF, this is a characteristic
 173      of the archiver and should be independently tunable.  This value is
 174      a WAG (wild a** guess) */
 175   15,
 176
 177   /* align_power_min: minimum alignment restriction for any section
 178      FIXME:  this value may be target machine dependent */
 179   3,
 180
 181   /* Routines to byte-swap various sized integers from the data sections */
 182   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 183     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 184     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 185
 186   /* Routines to byte-swap various sized integers from the file headers */
 187   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 188     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 189     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 190
 191   /* bfd_check_format: check the format of a file being read */
 192   { _bfd_dummy_target,          /* unknown format */
 193     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 194     bfd_generic_archive_p,      /* an archive */
 195     bfd_elf32_core_file_p       /* a core file */
 196   },
 197
 198   /* bfd_set_format: set the format of a file being written */
 199   { bfd_false,
 200     bfd_elf_mkobject,
 201     _bfd_generic_mkarchive,
 202     bfd_false
 203   },
 204
 205   /* bfd_write_contents: write cached information into a file being written */
 206   { bfd_false,
 207     bfd_elf32_write_object_contents,
 208     _bfd_write_archive_contents,
 209     bfd_false
 210   },
 211
 212   /* Initialize a jump table with the standard macro.  All names start with
 213      "elf" */
 214   JUMP_TABLE(bfd_elf32),
 215
 216   /* backend_data: */
 217   (PTR) &elf32_bed,
 218 };
 219 #endif
 220
 221 #ifdef TARGET_LITTLE_SYM
 222 bfd_target TARGET_LITTLE_SYM =
 223 {
 224   /* name: identify kind of target */
 225   TARGET_LITTLE_NAME,
 226
 227   /* flavour: general indication about file */
 228   bfd_target_elf_flavour,
 229
 230   /* byteorder_big_p: data is big endian */
 231   false,                /* Nope -- this one's little endian */
 232
 233   /* header_byteorder_big_p: header is also big endian */
 234   false,                /* Nope -- this one's little endian */
 235
 236   /* object_flags: mask of all file flags */
 237   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 238    DYNAMIC | WP_TEXT),
 239
 240   /* section_flags: mask of all section flags */
 241   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 242    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 243
 244    /* leading_symbol_char: is the first char of a user symbol
 245       predictable, and if so what is it */
 246    0,
 247
 248   /* ar_pad_char: pad character for filenames within an archive header
 249      FIXME:  this really has nothing to do with ELF, this is a characteristic
 250      of the archiver and/or os and should be independently tunable */
 251   '/',
 252
 253   /* ar_max_namelen: maximum number of characters in an archive header
 254      FIXME:  this really has nothing to do with ELF, this is a characteristic
 255      of the archiver and should be independently tunable.  This value is
 256      a WAG (wild a** guess) */
 257   15,
 258
 259   /* align_power_min: minimum alignment restriction for any section
 260      FIXME:  this value may be target machine dependent */
 261   3,
 262
 263   /* Routines to byte-swap various sized integers from the data sections */
 264   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 265     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 266     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 267
 268   /* Routines to byte-swap various sized integers from the file headers */
 269   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 270     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 271     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 272
 273   /* bfd_check_format: check the format of a file being read */
 274   { _bfd_dummy_target,          /* unknown format */
 275     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 276     bfd_generic_archive_p,      /* an archive */
 277     bfd_elf32_core_file_p       /* a core file */
 278   },
 279
 280   /* bfd_set_format: set the format of a file being written */
 281   { bfd_false,
 282     bfd_elf_mkobject,
 283     _bfd_generic_mkarchive,
 284     bfd_false
 285   },
 286
 287   /* bfd_write_contents: write cached information into a file being written */
 288   { bfd_false,
 289     bfd_elf32_write_object_contents,
 290     _bfd_write_archive_contents,
 291     bfd_false
 292   },
 293
 294   /* Initialize a jump table with the standard macro.  All names start with
 295      "elf" */
 296   JUMP_TABLE(bfd_elf32),
 297
 298   /* backend_data: */
 299   (PTR) &elf32_bed,
 300 };
 301 #endif