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