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