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