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