bfd/aout-target.h

   1 /* Define a target vector and some small routines for a variant of a.out.
   2    Copyright (C) 1990, 1991, 1992, 1993, 1994 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 extern CONST struct reloc_howto_struct * NAME(aout,reloc_type_lookup) ();
  26
  27 /* Set parameters about this a.out file that are machine-dependent.
  28    This routine is called from some_aout_object_p just before it returns.  */
  29 #ifndef MY_callback
  30 static bfd_target *
  31 MY(callback) (abfd)
  32      bfd *abfd;
  33 {
  34   struct internal_exec *execp = exec_hdr (abfd);
  35
  36   /* Calculate the file positions of the parts of a newly read aout header */
  37   obj_textsec (abfd)->_raw_size = N_TXTSIZE(*execp);
  38
  39   /* The virtual memory addresses of the sections */
  40   obj_textsec (abfd)->vma = N_TXTADDR(*execp);
  41   obj_datasec (abfd)->vma = N_DATADDR(*execp);
  42   obj_bsssec  (abfd)->vma = N_BSSADDR(*execp);
  43
  44   /* The file offsets of the sections */
  45   obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
  46   obj_datasec (abfd)->filepos = N_DATOFF (*execp);
  47
  48   /* The file offsets of the relocation info */
  49   obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
  50   obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
  51
  52   /* The file offsets of the string table and symbol table.  */
  53   obj_sym_filepos (abfd) = N_SYMOFF (*execp);
  54   obj_str_filepos (abfd) = N_STROFF (*execp);
  55
  56   /* Determine the architecture and machine type of the object file.  */
  57 #ifdef SET_ARCH_MACH
  58   SET_ARCH_MACH(abfd, *execp);
  59 #else
  60   bfd_default_set_arch_mach(abfd, DEFAULT_ARCH, 0);
  61 #endif
  62
  63   /* Don't set sizes now -- can't be sure until we know arch & mach.
  64      Sizes get set in set_sizes callback, later.  */
  65 #if 0
  66   adata(abfd).page_size = PAGE_SIZE;
  67 #ifdef SEGMENT_SIZE
  68   adata(abfd).segment_size = SEGMENT_SIZE;
  69 #else
  70   adata(abfd).segment_size = PAGE_SIZE;
  71 #endif
  72   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
  73 #endif
  74
  75   return abfd->xvec;
  76 }
  77 #endif
  78
  79 #ifndef MY_object_p
  80 /* Finish up the reading of an a.out file header */
  81
  82 static bfd_target *
  83 MY(object_p) (abfd)
  84      bfd *abfd;
  85 {
  86   struct external_exec exec_bytes;      /* Raw exec header from file */
  87   struct internal_exec exec;            /* Cleaned-up exec header */
  88   bfd_target *target;
  89
  90   if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
  91       != EXEC_BYTES_SIZE) {
  92     if (bfd_get_error () != bfd_error_system_call)
  93       bfd_set_error (bfd_error_wrong_format);
  94     return 0;
  95   }
  96
  97 #ifdef SWAP_MAGIC
  98   exec.a_info = SWAP_MAGIC (exec_bytes.e_info);
  99 #else
 100   exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
 101 #endif /* SWAP_MAGIC */
 102
 103   if (N_BADMAG (exec)) return 0;
 104 #ifdef MACHTYPE_OK
 105   if (!(MACHTYPE_OK (N_MACHTYPE (exec)))) return 0;
 106 #endif
 107
 108   NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
 109   target = NAME(aout,some_aout_object_p) (abfd, &exec, MY(callback));
 110
 111 #ifdef ENTRY_CAN_BE_ZERO
 112   /* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
 113    * means that it isn't obvious if EXEC_P should be set.
 114    * All of the following must be true for an executable:
 115    * There must be no relocations, the bfd can be neither an
 116    * archive nor an archive element, and the file must be executable. */
 117
 118   if (exec.a_trsize + exec.a_drsize == 0
 119       && bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
 120     {
 121       struct stat buf;
 122 #ifndef S_IXUSR
 123 #define S_IXUSR 0100    /* Execute by owner.  */
 124 #endif
 125       if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
 126         abfd->flags |= EXEC_P;
 127     }
 128 #endif /* ENTRY_CAN_BE_ZERO */
 129
 130   return target;
 131 }
 132 #define MY_object_p MY(object_p)
 133 #endif
 134
 135
 136 #ifndef MY_mkobject
 137 static boolean
 138 MY(mkobject) (abfd)
 139      bfd *abfd;
 140 {
 141   if (NAME(aout,mkobject)(abfd) == false)
 142     return false;
 143 #if 0 /* Sizes get set in set_sizes callback, later, after we know
 144          the architecture and machine.  */
 145   adata(abfd).page_size = PAGE_SIZE;
 146 #ifdef SEGMENT_SIZE
 147   adata(abfd).segment_size = SEGMENT_SIZE;
 148 #else
 149   adata(abfd).segment_size = PAGE_SIZE;
 150 #endif
 151   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 152 #endif
 153   return true;
 154 }
 155 #define MY_mkobject MY(mkobject)
 156 #endif
 157
 158 #ifndef MY_bfd_copy_private_section_data
 159
 160 /* Copy private section data.  This actually does nothing with the
 161    sections.  It copies the subformat field.  We copy it here, because
 162    we know whether this is a QMAGIC file before we set the section
 163    contents, and copy_private_bfd_data is not called until after the
 164    section contents have been set.  */
 165
 166 /*ARGSUSED*/
 167 static boolean
 168 MY_bfd_copy_private_section_data (ibfd, isec, obfd, osec)
 169      bfd *ibfd;
 170      asection *isec;
 171      bfd *obfd;
 172      asection *osec;
 173 {
 174   obj_aout_subformat (obfd) = obj_aout_subformat (ibfd);
 175   return true;
 176 }
 177
 178 #endif
 179
 180 /* Write an object file.
 181    Section contents have already been written.  We write the
 182    file header, symbols, and relocation.  */
 183
 184 #ifndef MY_write_object_contents
 185 static boolean
 186 MY(write_object_contents) (abfd)
 187      bfd *abfd;
 188 {
 189   struct external_exec exec_bytes;
 190   struct internal_exec *execp = exec_hdr (abfd);
 191
 192 #if CHOOSE_RELOC_SIZE
 193   CHOOSE_RELOC_SIZE(abfd);
 194 #else
 195   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
 196 #endif
 197
 198   WRITE_HEADERS(abfd, execp);
 199
 200   return true;
 201 }
 202 #define MY_write_object_contents MY(write_object_contents)
 203 #endif
 204
 205 #ifndef MY_set_sizes
 206 static boolean
 207 MY(set_sizes) (abfd)
 208      bfd *abfd;
 209 {
 210   adata(abfd).page_size = PAGE_SIZE;
 211 #ifdef SEGMENT_SIZE
 212   adata(abfd).segment_size = SEGMENT_SIZE;
 213 #else
 214   adata(abfd).segment_size = PAGE_SIZE;
 215 #endif
 216   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 217   return true;
 218 }
 219 #define MY_set_sizes MY(set_sizes)
 220 #endif
 221
 222 #ifndef MY_exec_hdr_flags
 223 #define MY_exec_hdr_flags 0
 224 #endif
 225
 226 #ifndef MY_backend_data
 227
 228 #ifndef MY_text_includes_header
 229 #define MY_text_includes_header 0
 230 #endif
 231 #ifndef MY_add_dynamic_symbols
 232 #define MY_add_dynamic_symbols 0
 233 #endif
 234 #ifndef MY_add_one_symbol
 235 #define MY_add_one_symbol 0
 236 #endif
 237 #ifndef MY_link_dynamic_object
 238 #define MY_link_dynamic_object 0
 239 #endif
 240 #ifndef MY_write_dynamic_symbol
 241 #define MY_write_dynamic_symbol 0
 242 #endif
 243 #ifndef MY_check_dynamic_reloc
 244 #define MY_check_dynamic_reloc 0
 245 #endif
 246 #ifndef MY_finish_dynamic_link
 247 #define MY_finish_dynamic_link 0
 248 #endif
 249
 250 static CONST struct aout_backend_data MY(backend_data) = {
 251   0,                            /* zmagic contiguous */
 252   MY_text_includes_header,
 253   MY_exec_hdr_flags,
 254   0,                            /* text vma? */
 255   MY_set_sizes,
 256   0,                            /* exec header is counted */
 257   MY_add_dynamic_symbols,
 258   MY_add_one_symbol,
 259   MY_link_dynamic_object,
 260   MY_write_dynamic_symbol,
 261   MY_check_dynamic_reloc,
 262   MY_finish_dynamic_link
 263 };
 264 #define MY_backend_data &MY(backend_data)
 265 #endif
 266
 267 #ifndef MY_final_link_callback
 268
 269 /* Callback for the final_link routine to set the section offsets.  */
 270
 271 static void MY_final_link_callback
 272   PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
 273
 274 static void
 275 MY_final_link_callback (abfd, ptreloff, pdreloff, psymoff)
 276      bfd *abfd;
 277      file_ptr *ptreloff;
 278      file_ptr *pdreloff;
 279      file_ptr *psymoff;
 280 {
 281   struct internal_exec *execp = exec_hdr (abfd);
 282
 283   *ptreloff = N_TRELOFF (*execp);
 284   *pdreloff = N_DRELOFF (*execp);
 285   *psymoff = N_SYMOFF (*execp);
 286 }
 287
 288 #endif
 289
 290 #ifndef MY_bfd_final_link
 291
 292 /* Final link routine.  We need to use a call back to get the correct
 293    offsets in the output file.  */
 294
 295 static boolean
 296 MY_bfd_final_link (abfd, info)
 297      bfd *abfd;
 298      struct bfd_link_info *info;
 299 {
 300   return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
 301 }
 302
 303 #endif
 304
 305 /* We assume BFD generic archive files.  */
 306 #ifndef MY_openr_next_archived_file
 307 #define MY_openr_next_archived_file     bfd_generic_openr_next_archived_file
 308 #endif
 309 #ifndef MY_generic_stat_arch_elt
 310 #define MY_generic_stat_arch_elt        bfd_generic_stat_arch_elt
 311 #endif
 312 #ifndef MY_slurp_armap
 313 #define MY_slurp_armap                  bfd_slurp_bsd_armap
 314 #endif
 315 #ifndef MY_slurp_extended_name_table
 316 #define MY_slurp_extended_name_table    _bfd_slurp_extended_name_table
 317 #endif
 318 #ifndef MY_write_armap
 319 #define MY_write_armap          bsd_write_armap
 320 #endif
 321 #ifndef MY_truncate_arname
 322 #define MY_truncate_arname              bfd_bsd_truncate_arname
 323 #endif
 324
 325 /* No core file defined here -- configure in trad-core.c separately.  */
 326 #ifndef MY_core_file_failing_command
 327 #define MY_core_file_failing_command _bfd_nocore_core_file_failing_command
 328 #endif
 329 #ifndef MY_core_file_failing_signal
 330 #define MY_core_file_failing_signal     _bfd_nocore_core_file_failing_signal
 331 #endif
 332 #ifndef MY_core_file_matches_executable_p
 333 #define MY_core_file_matches_executable_p       \
 334                                 _bfd_nocore_core_file_matches_executable_p
 335 #endif
 336 #ifndef MY_core_file_p
 337 #define MY_core_file_p          _bfd_dummy_target
 338 #endif
 339
 340 #ifndef MY_bfd_debug_info_start
 341 #define MY_bfd_debug_info_start         bfd_void
 342 #endif
 343 #ifndef MY_bfd_debug_info_end
 344 #define MY_bfd_debug_info_end           bfd_void
 345 #endif
 346 #ifndef MY_bfd_debug_info_accumulate
 347 #define MY_bfd_debug_info_accumulate    \
 348                         (void (*) PARAMS ((bfd*, struct sec *))) bfd_void
 349 #endif
 350
 351 #ifndef MY_core_file_failing_command
 352 #define MY_core_file_failing_command NAME(aout,core_file_failing_command)
 353 #endif
 354 #ifndef MY_core_file_failing_signal
 355 #define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
 356 #endif
 357 #ifndef MY_core_file_matches_executable_p
 358 #define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
 359 #endif
 360 #ifndef MY_set_section_contents
 361 #define MY_set_section_contents NAME(aout,set_section_contents)
 362 #endif
 363 #ifndef MY_get_section_contents
 364 #define MY_get_section_contents NAME(aout,get_section_contents)
 365 #endif
 366 #ifndef MY_new_section_hook
 367 #define MY_new_section_hook NAME(aout,new_section_hook)
 368 #endif
 369 #ifndef MY_get_symtab_upper_bound
 370 #define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
 371 #endif
 372 #ifndef MY_get_symtab
 373 #define MY_get_symtab NAME(aout,get_symtab)
 374 #endif
 375 #ifndef MY_get_reloc_upper_bound
 376 #define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
 377 #endif
 378 #ifndef MY_canonicalize_reloc
 379 #define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
 380 #endif
 381 #ifndef MY_make_empty_symbol
 382 #define MY_make_empty_symbol NAME(aout,make_empty_symbol)
 383 #endif
 384 #ifndef MY_print_symbol
 385 #define MY_print_symbol NAME(aout,print_symbol)
 386 #endif
 387 #ifndef MY_get_symbol_info
 388 #define MY_get_symbol_info NAME(aout,get_symbol_info)
 389 #endif
 390 #ifndef MY_get_lineno
 391 #define MY_get_lineno NAME(aout,get_lineno)
 392 #endif
 393 #ifndef MY_set_arch_mach
 394 #define MY_set_arch_mach NAME(aout,set_arch_mach)
 395 #endif
 396 #ifndef MY_find_nearest_line
 397 #define MY_find_nearest_line NAME(aout,find_nearest_line)
 398 #endif
 399 #ifndef MY_sizeof_headers
 400 #define MY_sizeof_headers NAME(aout,sizeof_headers)
 401 #endif
 402 #ifndef MY_bfd_get_relocated_section_contents
 403 #define MY_bfd_get_relocated_section_contents \
 404                         bfd_generic_get_relocated_section_contents
 405 #endif
 406 #ifndef MY_bfd_relax_section
 407 #define MY_bfd_relax_section bfd_generic_relax_section
 408 #endif
 409 #ifndef MY_bfd_reloc_type_lookup
 410 #define MY_bfd_reloc_type_lookup NAME(aout,reloc_type_lookup)
 411 #endif
 412 #ifndef MY_bfd_make_debug_symbol
 413 #define MY_bfd_make_debug_symbol 0
 414 #endif
 415 #ifndef MY_bfd_link_hash_table_create
 416 #define MY_bfd_link_hash_table_create NAME(aout,link_hash_table_create)
 417 #endif
 418 #ifndef MY_bfd_link_add_symbols
 419 #define MY_bfd_link_add_symbols NAME(aout,link_add_symbols)
 420 #endif
 421
 422 #ifndef MY_bfd_copy_private_bfd_data
 423 #define MY_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
 424 #endif
 425
 426 #ifndef MY_bfd_is_local_label
 427 #define MY_bfd_is_local_label bfd_generic_is_local_label
 428 #endif
 429
 430 #ifndef MY_bfd_free_cached_info
 431 #define MY_bfd_free_cached_info NAME(aout,bfd_free_cached_info)
 432 #endif
 433
 434 #ifndef MY_close_and_cleanup
 435 #define MY_close_and_cleanup MY_bfd_free_cached_info
 436 #endif
 437
 438 #ifndef MY_get_dynamic_symtab_upper_bound
 439 #define MY_get_dynamic_symtab_upper_bound \
 440   _bfd_nodynamic_get_dynamic_symtab_upper_bound
 441 #endif
 442 #ifndef MY_canonicalize_dynamic_symtab
 443 #define MY_canonicalize_dynamic_symtab \
 444   _bfd_nodynamic_canonicalize_dynamic_symtab
 445 #endif
 446 #ifndef MY_get_dynamic_reloc_upper_bound
 447 #define MY_get_dynamic_reloc_upper_bound \
 448   _bfd_nodynamic_get_dynamic_reloc_upper_bound
 449 #endif
 450 #ifndef MY_canonicalize_dynamic_reloc
 451 #define MY_canonicalize_dynamic_reloc \
 452   _bfd_nodynamic_canonicalize_dynamic_reloc
 453 #endif
 454
 455 /* Aout symbols normally have leading underscores */
 456 #ifndef MY_symbol_leading_char
 457 #define MY_symbol_leading_char '_'
 458 #endif
 459
 460 /* Aout archives normally use spaces for padding */
 461 #ifndef AR_PAD_CHAR
 462 #define AR_PAD_CHAR ' '
 463 #endif
 464
 465 #ifndef MY_BFD_TARGET
 466 bfd_target MY(vec) =
 467 {
 468   TARGETNAME,           /* name */
 469   bfd_target_aout_flavour,
 470 #ifdef TARGET_IS_BIG_ENDIAN_P
 471   true,                         /* target byte order (big) */
 472   true,                         /* target headers byte order (big) */
 473 #else
 474   false,                        /* target byte order (little) */
 475   false,                        /* target headers byte order (little) */
 476 #endif
 477   (HAS_RELOC | EXEC_P |         /* object flags */
 478    HAS_LINENO | HAS_DEBUG |
 479    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
 480   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 481   MY_symbol_leading_char,
 482   AR_PAD_CHAR,                  /* ar_pad_char */
 483   15,                           /* ar_max_namelen */
 484   3,                            /* minimum alignment */
 485 #ifdef TARGET_IS_BIG_ENDIAN_P
 486   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 487      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 488      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
 489   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 490      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 491      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
 492 #else
 493   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 494      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 495      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
 496   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 497      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 498      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
 499 #endif
 500     {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
 501        bfd_generic_archive_p, MY_core_file_p},
 502     {bfd_false, MY_mkobject,    /* bfd_set_format */
 503        _bfd_generic_mkarchive, bfd_false},
 504     {bfd_false, MY_write_object_contents, /* bfd_write_contents */
 505        _bfd_write_archive_contents, bfd_false},
 506
 507      BFD_JUMP_TABLE_GENERIC (MY),
 508      BFD_JUMP_TABLE_COPY (MY),
 509      BFD_JUMP_TABLE_CORE (MY),
 510      BFD_JUMP_TABLE_ARCHIVE (MY),
 511      BFD_JUMP_TABLE_SYMBOLS (MY),
 512      BFD_JUMP_TABLE_RELOCS (MY),
 513      BFD_JUMP_TABLE_WRITE (MY),
 514      BFD_JUMP_TABLE_LINK (MY),
 515      BFD_JUMP_TABLE_DYNAMIC (MY),
 516
 517   (PTR) MY_backend_data,
 518 };
 519 #endif /* MY_BFD_TARGET */