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 #ifndef bfd_elf32_bfd_seclet_link
  51 #define bfd_elf32_bfd_seclet_link bfd_generic_seclet_link
  52 #endif
  53 #define bfd_elf32_bfd_make_debug_symbol \
  54   ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
  55
  56 #ifndef elf_info_to_howto_rel
  57 #define elf_info_to_howto_rel 0
  58 #endif
  59
  60 #ifndef ELF_MAXPAGESIZE
  61 #define ELF_MAXPAGESIZE 1
  62 #endif
  63
  64 #ifndef elf_backend_symbol_processing
  65 #define elf_backend_symbol_processing   0       /* elf_backend_symbol_processing */
  66 #endif
  67 #ifndef elf_backend_symbol_table_processing
  68 #define elf_backend_symbol_table_processing     0       /* elf_backend_symbol_table_processing */
  69 #endif
  70 #ifndef elf_backend_section_processing
  71 #define elf_backend_section_processing  0       /* elf_backend_section_processing */
  72 #endif
  73 #ifndef elf_backend_section_from_shdr
  74 #define elf_backend_section_from_shdr   0       /* elf_backend_section_from_shdr */
  75 #endif
  76 #ifndef elf_backend_fake_sections
  77 #define elf_backend_fake_sections       0       /* elf_backend_fake_sections */
  78 #endif
  79 #ifndef elf_backend_section_from_bfd_section
  80 #define elf_backend_section_from_bfd_section    0       /* elf_backend_section_from_bfd_section */
  81 #endif
  82
  83 static CONST struct elf_backend_data elf32_bed =
  84 {
  85 #ifdef USE_REL
  86   0,                            /* use_rela_p */
  87 #else
  88   1,                            /* use_rela_p */
  89 #endif
  90   0,                            /* elf_64_p */
  91   ELF_ARCH,                     /* arch */
  92   elf_info_to_howto,            /* elf_info_to_howto */
  93   elf_info_to_howto_rel,        /* elf_info_to_howto_rel */
  94   ELF_MAXPAGESIZE,              /* maxpagesize */
  95   bfd_elf32__write_relocs,      /* write_relocs */
  96   elf_backend_symbol_processing,        /* elf_backend_symbol_processing */
  97   elf_backend_symbol_table_processing,  /* elf_backend_symbol_table_processing */
  98   elf_backend_section_processing,       /* elf_backend_section_processing */
  99   elf_backend_section_from_shdr,        /* elf_backend_section_from_shdr */
 100   elf_backend_fake_sections,            /* elf_backend_fake_sections */
 101   elf_backend_section_from_bfd_section, /* elf_backend_section_from_bfd_section */
 102 };
 103
 104 #ifdef TARGET_BIG_SYM
 105 bfd_target TARGET_BIG_SYM =
 106 {
 107   /* name: identify kind of target */
 108   TARGET_BIG_NAME,
 109
 110   /* flavour: general indication about file */
 111   bfd_target_elf_flavour,
 112
 113   /* byteorder_big_p: data is big endian */
 114   true,
 115
 116   /* header_byteorder_big_p: header is also big endian */
 117   true,
 118
 119   /* object_flags: mask of all file flags */
 120   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 121    DYNAMIC | WP_TEXT),
 122
 123   /* section_flags: mask of all section flags */
 124   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 125    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 126
 127    /* leading_symbol_char: is the first char of a user symbol
 128       predictable, and if so what is it */
 129    0,
 130
 131   /* ar_pad_char: pad character for filenames within an archive header
 132      FIXME:  this really has nothing to do with ELF, this is a characteristic
 133      of the archiver and/or os and should be independently tunable */
 134   '/',
 135
 136   /* ar_max_namelen: maximum number of characters in an archive header
 137      FIXME:  this really has nothing to do with ELF, this is a characteristic
 138      of the archiver and should be independently tunable.  This value is
 139      a WAG (wild a** guess) */
 140   15,
 141
 142   /* align_power_min: minimum alignment restriction for any section
 143      FIXME:  this value may be target machine dependent */
 144   3,
 145
 146   /* Routines to byte-swap various sized integers from the data sections */
 147   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 148     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 149     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 150
 151   /* Routines to byte-swap various sized integers from the file headers */
 152   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 153     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 154     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
 155
 156   /* bfd_check_format: check the format of a file being read */
 157   { _bfd_dummy_target,          /* unknown format */
 158     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 159     bfd_generic_archive_p,      /* an archive */
 160     bfd_elf32_core_file_p       /* a core file */
 161   },
 162
 163   /* bfd_set_format: set the format of a file being written */
 164   { bfd_false,
 165     bfd_elf_mkobject,
 166     _bfd_generic_mkarchive,
 167     bfd_false
 168   },
 169
 170   /* bfd_write_contents: write cached information into a file being written */
 171   { bfd_false,
 172     bfd_elf32_write_object_contents,
 173     _bfd_write_archive_contents,
 174     bfd_false
 175   },
 176
 177   /* Initialize a jump table with the standard macro.  All names start with
 178      "elf" */
 179   JUMP_TABLE(bfd_elf32),
 180
 181   /* backend_data: */
 182   (PTR) &elf32_bed,
 183 };
 184 #endif
 185
 186 #ifdef TARGET_LITTLE_SYM
 187 bfd_target TARGET_LITTLE_SYM =
 188 {
 189   /* name: identify kind of target */
 190   TARGET_LITTLE_NAME,
 191
 192   /* flavour: general indication about file */
 193   bfd_target_elf_flavour,
 194
 195   /* byteorder_big_p: data is big endian */
 196   false,                /* Nope -- this one's little endian */
 197
 198   /* header_byteorder_big_p: header is also big endian */
 199   false,                /* Nope -- this one's little endian */
 200
 201   /* object_flags: mask of all file flags */
 202   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS |
 203    DYNAMIC | WP_TEXT),
 204
 205   /* section_flags: mask of all section flags */
 206   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY |
 207    SEC_CODE | SEC_DATA | SEC_DEBUGGING),
 208
 209    /* leading_symbol_char: is the first char of a user symbol
 210       predictable, and if so what is it */
 211    0,
 212
 213   /* ar_pad_char: pad character for filenames within an archive header
 214      FIXME:  this really has nothing to do with ELF, this is a characteristic
 215      of the archiver and/or os and should be independently tunable */
 216   '/',
 217
 218   /* ar_max_namelen: maximum number of characters in an archive header
 219      FIXME:  this really has nothing to do with ELF, this is a characteristic
 220      of the archiver and should be independently tunable.  This value is
 221      a WAG (wild a** guess) */
 222   15,
 223
 224   /* align_power_min: minimum alignment restriction for any section
 225      FIXME:  this value may be target machine dependent */
 226   3,
 227
 228   /* Routines to byte-swap various sized integers from the data sections */
 229   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 230     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 231     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 232
 233   /* Routines to byte-swap various sized integers from the file headers */
 234   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 235     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 236     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
 237
 238   /* bfd_check_format: check the format of a file being read */
 239   { _bfd_dummy_target,          /* unknown format */
 240     bfd_elf32_object_p,         /* assembler/linker output (object file) */
 241     bfd_generic_archive_p,      /* an archive */
 242     bfd_elf32_core_file_p       /* a core file */
 243   },
 244
 245   /* bfd_set_format: set the format of a file being written */
 246   { bfd_false,
 247     bfd_elf_mkobject,
 248     _bfd_generic_mkarchive,
 249     bfd_false
 250   },
 251
 252   /* bfd_write_contents: write cached information into a file being written */
 253   { bfd_false,
 254     bfd_elf32_write_object_contents,
 255     _bfd_write_archive_contents,
 256     bfd_false
 257   },
 258
 259   /* Initialize a jump table with the standard macro.  All names start with
 260      "elf" */
 261   JUMP_TABLE(bfd_elf32),
 262
 263   /* backend_data: */
 264   (PTR) &elf32_bed,
 265 };
 266 #endif