bfd/aout-target.h

   1 /* Define a target vector and some small routines for a variant of a.out.
   2    Copyright (C) 1990-1991 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 #include "aout/aout64.h"
  21 #include "aout/stab_gnu.h"
  22 #include "aout/ar.h"
  23 /*#include "libaout.h"*/
  24
  25 /* Set parameters about this a.out file that are machine-dependent.
  26    This routine is called from some_aout_object_p just before it returns.  */
  27 static bfd_target *
  28 DEFUN(MY(callback),(abfd),
  29       bfd *abfd)
  30 {
  31   struct internal_exec *execp = exec_hdr (abfd);
  32
  33 /* Calculate the file positions of the parts of a newly read aout header */
  34   obj_textsec (abfd)->_raw_size = N_TXTSIZE(*execp);
  35
  36   /* The virtual memory addresses of the sections */
  37   obj_textsec (abfd)->vma = N_TXTADDR(*execp);
  38   obj_datasec (abfd)->vma = N_DATADDR(*execp);
  39   obj_bsssec  (abfd)->vma = N_BSSADDR(*execp);
  40
  41   /* The file offsets of the sections */
  42   obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
  43   obj_datasec (abfd)->filepos = N_DATOFF (*execp);
  44
  45   /* The file offsets of the relocation info */
  46   obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
  47   obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
  48
  49   /* The file offsets of the string table and symbol table.  */
  50   obj_sym_filepos (abfd) = N_SYMOFF (*execp);
  51   obj_str_filepos (abfd) = N_STROFF (*execp);
  52
  53   /* Determine the architecture and machine type of the object file.  */
  54 #ifdef SET_ARCH_MACH
  55   SET_ARCH_MACH(abfd, *execp);
  56 #else
  57   bfd_default_set_arch_mach(abfd, DEFAULT_ARCH, 0);
  58 #endif
  59
  60   adata(abfd).page_size = PAGE_SIZE;
  61 #ifdef SEGMENT_SIZE
  62   adata(abfd).segment_size = SEGMENT_SIZE;
  63 #else
  64   adata(abfd).segment_size = PAGE_SIZE;
  65 #endif
  66   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
  67
  68   return abfd->xvec;
  69 }
  70
  71 #ifndef MY_object_p
  72 /* Finish up the reading of an a.out file header */
  73
  74 static bfd_target *
  75 DEFUN(MY(object_p),(abfd),
  76      bfd *abfd)
  77 {
  78   struct external_exec exec_bytes;      /* Raw exec header from file */
  79   struct internal_exec exec;            /* Cleaned-up exec header */
  80   bfd_target *target;
  81
  82   if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
  83       != EXEC_BYTES_SIZE) {
  84     bfd_error = wrong_format;
  85     return 0;
  86   }
  87
  88   exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
  89
  90   if (N_BADMAG (exec)) return 0;
  91
  92   NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
  93   target = NAME(aout,some_aout_object_p) (abfd, &exec, MY(callback));
  94
  95 #ifdef ENTRY_CAN_BE_ZERO
  96   /* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
  97    * means that it isn't obvious if EXEC_P should be set.
  98    * All of the following must be true for an executable:
  99    * There must be no relocations, the bfd can be neither an
 100    * archive nor an archive element, and the file must be executable. */
 101
 102   if (exec.a_trsize + exec.a_drsize == 0
 103       && bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
 104     {
 105       struct stat buf;
 106 #ifndef S_IXUSR
 107 #define S_IXUSR 0100    /* Execute by owner.  */
 108 #endif
 109       if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
 110         abfd->flags |= EXEC_P;
 111     }
 112 #endif /* ENTRY_CAN_BE_ZERO */
 113
 114   return target;
 115 }
 116 #define MY_object_p MY(object_p)
 117 #endif
 118
 119
 120 #ifndef MY_mkobject
 121 static boolean
 122 DEFUN(MY(mkobject),(abfd),
 123       bfd *abfd)
 124 {
 125   if (NAME(aout,mkobject)(abfd) == false)
 126     return false;
 127   adata(abfd).page_size = PAGE_SIZE;
 128 #ifdef SEGMENT_SIZE
 129   adata(abfd).segment_size = SEGMENT_SIZE;
 130 #else
 131   adata(abfd).segment_size = PAGE_SIZE;
 132 #endif
 133   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 134   return true;
 135 }
 136 #define MY_mkobject MY(mkobject)
 137 #endif
 138
 139 /* Write an object file.
 140    Section contents have already been written.  We write the
 141    file header, symbols, and relocation.  */
 142
 143 #ifndef MY_write_object_contents
 144 static boolean
 145 DEFUN(MY(write_object_contents),(abfd),
 146       bfd *abfd)
 147 {
 148   bfd_size_type data_pad = 0;
 149   struct external_exec exec_bytes;
 150   struct internal_exec *execp = exec_hdr (abfd);
 151
 152 #if CHOOSE_RELOC_SIZE
 153   CHOOSE_RELOC_SIZE(abfd);
 154 #else
 155   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
 156 #endif
 157
 158   WRITE_HEADERS(abfd, execp);
 159
 160   return true;
 161 }
 162 #define MY_write_object_contents MY(write_object_contents)
 163 #endif
 164
 165 /* We assume BFD generic archive files.  */
 166 #ifndef MY_openr_next_archived_file
 167 #define MY_openr_next_archived_file     bfd_generic_openr_next_archived_file
 168 #endif
 169 #ifndef MY_generic_stat_arch_elt
 170 #define MY_generic_stat_arch_elt        bfd_generic_stat_arch_elt
 171 #endif
 172 #ifndef MY_slurp_armap
 173 #define MY_slurp_armap                  bfd_slurp_bsd_armap
 174 #endif
 175 #ifndef MY_slurp_extended_name_table
 176 #define MY_slurp_extended_name_table    _bfd_slurp_extended_name_table
 177 #endif
 178 #ifndef MY_write_armap
 179 #define MY_write_armap          bsd_write_armap
 180 #endif
 181 #ifndef MY_truncate_arname
 182 #define MY_truncate_arname              bfd_bsd_truncate_arname
 183 #endif
 184
 185 /* No core file defined here -- configure in trad-core.c separately.  */
 186 #ifndef MY_core_file_failing_command
 187 #define MY_core_file_failing_command _bfd_dummy_core_file_failing_command
 188 #endif
 189 #ifndef MY_core_file_failing_signal
 190 #define MY_core_file_failing_signal     _bfd_dummy_core_file_failing_signal
 191 #endif
 192 #ifndef MY_core_file_matches_executable_p
 193 #define MY_core_file_matches_executable_p       \
 194                                 _bfd_dummy_core_file_matches_executable_p
 195 #endif
 196 #ifndef MY_core_file_p
 197 #define MY_core_file_p          _bfd_dummy_target
 198 #endif
 199
 200 #ifndef MY_bfd_debug_info_start
 201 #define MY_bfd_debug_info_start         bfd_void
 202 #endif
 203 #ifndef MY_bfd_debug_info_end
 204 #define MY_bfd_debug_info_end           bfd_void
 205 #endif
 206 #ifndef MY_bfd_debug_info_accumulate
 207 #define MY_bfd_debug_info_accumulate    (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
 208 #endif
 209
 210 #ifndef MY_core_file_failing_command
 211 #define MY_core_file_failing_command NAME(aout,core_file_failing_command)
 212 #endif
 213 #ifndef MY_core_file_failing_signal
 214 #define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
 215 #endif
 216 #ifndef MY_core_file_matches_executable_p
 217 #define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
 218 #endif
 219 #ifndef MY_slurp_armap
 220 #define MY_slurp_armap NAME(aout,slurp_armap)
 221 #endif
 222 #ifndef MY_slurp_extended_name_table
 223 #define MY_slurp_extended_name_table NAME(aout,slurp_extended_name_table)
 224 #endif
 225 #ifndef MY_truncate_arname
 226 #define MY_truncate_arname NAME(aout,truncate_arname)
 227 #endif
 228 #ifndef MY_write_armap
 229 #define MY_write_armap NAME(aout,write_armap)
 230 #endif
 231 #ifndef MY_close_and_cleanup
 232 #define MY_close_and_cleanup NAME(aout,close_and_cleanup)
 233 #endif
 234 #ifndef MY_set_section_contents
 235 #define MY_set_section_contents NAME(aout,set_section_contents)
 236 #endif
 237 #ifndef MY_get_section_contents
 238 #define MY_get_section_contents NAME(aout,get_section_contents)
 239 #endif
 240 #ifndef MY_new_section_hook
 241 #define MY_new_section_hook NAME(aout,new_section_hook)
 242 #endif
 243 #ifndef MY_get_symtab_upper_bound
 244 #define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
 245 #endif
 246 #ifndef MY_get_symtab
 247 #define MY_get_symtab NAME(aout,get_symtab)
 248 #endif
 249 #ifndef MY_get_reloc_upper_bound
 250 #define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
 251 #endif
 252 #ifndef MY_canonicalize_reloc
 253 #define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
 254 #endif
 255 #ifndef MY_make_empty_symbol
 256 #define MY_make_empty_symbol NAME(aout,make_empty_symbol)
 257 #endif
 258 #ifndef MY_print_symbol
 259 #define MY_print_symbol NAME(aout,print_symbol)
 260 #endif
 261 #ifndef MY_get_lineno
 262 #define MY_get_lineno NAME(aout,get_lineno)
 263 #endif
 264 #ifndef MY_set_arch_mach
 265 #define MY_set_arch_mach NAME(aout,set_arch_mach)
 266 #endif
 267 #ifndef MY_openr_next_archived_file
 268 #define MY_openr_next_archived_file NAME(aout,openr_next_archived_file)
 269 #endif
 270 #ifndef MY_find_nearest_line
 271 #define MY_find_nearest_line NAME(aout,find_nearest_line)
 272 #endif
 273 #ifndef MY_generic_stat_arch_elt
 274 #define MY_generic_stat_arch_elt NAME(aout,generic_stat_arch_elt)
 275 #endif
 276 #ifndef MY_sizeof_headers
 277 #define MY_sizeof_headers NAME(aout,sizeof_headers)
 278 #endif
 279 #ifndef MY_bfd_debug_info_start
 280 #define MY_bfd_debug_info_start NAME(aout,bfd_debug_info_start)
 281 #endif
 282 #ifndef MY_bfd_debug_info_end
 283 #define MY_bfd_debug_info_end NAME(aout,bfd_debug_info_end)
 284 #endif
 285 #ifndef MY_bfd_debug_info_accumulat
 286 #define MY_bfd_debug_info_accumulat NAME(aout,bfd_debug_info_accumulat)
 287 #endif
 288 #ifndef MY_reloc_howto_type_lookup
 289 #define MY_reloc_howto_type_lookup 0
 290 #endif
 291 #ifndef MY_make_debug_symbol
 292 #define MY_make_debug_symbol 0
 293 #endif
 294 #ifndef MY_backend_data
 295 #define MY_backend_data (PTR) 0
 296 #endif
 297
 298 bfd_target MY(vec) =
 299 {
 300   TARGETNAME,           /* name */
 301   bfd_target_aout_flavour,
 302 #ifdef TARGET_IS_BIG_ENDIAN_P
 303   true,                         /* target byte order (big) */
 304   true,                         /* target headers byte order (big) */
 305 #else
 306   false,                        /* target byte order (little) */
 307   false,                        /* target headers byte order (little) */
 308 #endif
 309   (HAS_RELOC | EXEC_P |         /* object flags */
 310    HAS_LINENO | HAS_DEBUG |
 311    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
 312   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 313   ' ',                          /* ar_pad_char */
 314   15,                           /* ar_max_namelen */
 315   1,                            /* minimum alignment */
 316 #ifdef TARGET_IS_BIG_ENDIAN_P
 317   _do_getb64, _do_putb64,       _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
 318   _do_getb64, _do_putb64,       _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
 319 #else
 320   _do_getl64, _do_putl64,       _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
 321   _do_getl64, _do_putl64,       _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* hdrs */
 322 #endif
 323     {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
 324        bfd_generic_archive_p, MY_core_file_p},
 325     {bfd_false, MY_mkobject,    /* bfd_set_format */
 326        _bfd_generic_mkarchive, bfd_false},
 327     {bfd_false, MY_write_object_contents, /* bfd_write_contents */
 328        _bfd_write_archive_contents, bfd_false},
 329
 330   MY_core_file_failing_command,
 331   MY_core_file_failing_signal,
 332   MY_core_file_matches_executable_p,
 333   MY_slurp_armap,
 334   MY_slurp_extended_name_table,
 335   MY_truncate_arname,
 336   MY_write_armap,
 337   MY_close_and_cleanup,
 338   MY_set_section_contents,
 339   MY_get_section_contents,
 340   MY_new_section_hook,
 341   MY_get_symtab_upper_bound,
 342   MY_get_symtab,
 343   MY_get_reloc_upper_bound,
 344   MY_canonicalize_reloc,
 345   MY_make_empty_symbol,
 346   MY_print_symbol,
 347   MY_get_lineno,
 348   MY_set_arch_mach,
 349   MY_openr_next_archived_file,
 350   MY_find_nearest_line,
 351   MY_generic_stat_arch_elt,
 352   MY_sizeof_headers,
 353   MY_bfd_debug_info_start,
 354   MY_bfd_debug_info_end,
 355   MY_bfd_debug_info_accumulate,
 356   bfd_generic_get_relocated_section_contents,
 357   bfd_generic_relax_section,
 358   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* COFF stuff?! */
 359   MY_reloc_howto_type_lookup,
 360   MY_make_debug_symbol,
 361   (PTR) MY_backend_data,
 362 };