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 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 DEFUN(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 DEFUN(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     bfd_error = wrong_format;
  93     return 0;
  94   }
  95
  96 #ifdef SWAP_MAGIC
  97   exec.a_info = SWAP_MAGIC (exec_bytes.e_info);
  98 #else
  99   exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
 100 #endif /* SWAP_MAGIC */
 101
 102   if (N_BADMAG (exec)) return 0;
 103 #ifdef MACHTYPE_OK
 104   if (!(MACHTYPE_OK (N_MACHTYPE (exec)))) return 0;
 105 #endif
 106
 107   NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
 108   target = NAME(aout,some_aout_object_p) (abfd, &exec, MY(callback));
 109
 110 #ifdef ENTRY_CAN_BE_ZERO
 111   /* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
 112    * means that it isn't obvious if EXEC_P should be set.
 113    * All of the following must be true for an executable:
 114    * There must be no relocations, the bfd can be neither an
 115    * archive nor an archive element, and the file must be executable. */
 116
 117   if (exec.a_trsize + exec.a_drsize == 0
 118       && bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
 119     {
 120       struct stat buf;
 121 #ifndef S_IXUSR
 122 #define S_IXUSR 0100    /* Execute by owner.  */
 123 #endif
 124       if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
 125         abfd->flags |= EXEC_P;
 126     }
 127 #endif /* ENTRY_CAN_BE_ZERO */
 128
 129   return target;
 130 }
 131 #define MY_object_p MY(object_p)
 132 #endif
 133
 134
 135 #ifndef MY_mkobject
 136 static boolean
 137 DEFUN(MY(mkobject),(abfd),
 138       bfd *abfd)
 139 {
 140   if (NAME(aout,mkobject)(abfd) == false)
 141     return false;
 142 #if 0 /* Sizes get set in set_sizes callback, later, after we know
 143          the architecture and machine.  */
 144   adata(abfd).page_size = PAGE_SIZE;
 145 #ifdef SEGMENT_SIZE
 146   adata(abfd).segment_size = SEGMENT_SIZE;
 147 #else
 148   adata(abfd).segment_size = PAGE_SIZE;
 149 #endif
 150   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 151 #endif
 152   return true;
 153 }
 154 #define MY_mkobject MY(mkobject)
 155 #endif
 156
 157 /* Write an object file.
 158    Section contents have already been written.  We write the
 159    file header, symbols, and relocation.  */
 160
 161 #ifndef MY_write_object_contents
 162 static boolean
 163 DEFUN(MY(write_object_contents),(abfd),
 164       bfd *abfd)
 165 {
 166   struct external_exec exec_bytes;
 167   struct internal_exec *execp = exec_hdr (abfd);
 168
 169 #if CHOOSE_RELOC_SIZE
 170   CHOOSE_RELOC_SIZE(abfd);
 171 #else
 172   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
 173 #endif
 174
 175   WRITE_HEADERS(abfd, execp);
 176
 177   return true;
 178 }
 179 #define MY_write_object_contents MY(write_object_contents)
 180 #endif
 181
 182 #ifndef MY_set_sizes
 183 static boolean
 184 DEFUN(MY(set_sizes),(abfd), bfd *abfd)
 185 {
 186   adata(abfd).page_size = PAGE_SIZE;
 187 #ifdef SEGMENT_SIZE
 188   adata(abfd).segment_size = SEGMENT_SIZE;
 189 #else
 190   adata(abfd).segment_size = PAGE_SIZE;
 191 #endif
 192   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 193   return true;
 194 }
 195 #define MY_set_sizes MY(set_sizes)
 196 #endif
 197
 198 #ifndef MY_backend_data
 199 static CONST struct aout_backend_data MY(backend_data) = {
 200   0,                            /* zmagic contiguous */
 201   0,                            /* text incl header */
 202   0,                            /* text vma? */
 203   MY_set_sizes,
 204   0,                            /* exec header is counted */
 205 };
 206 #define MY_backend_data &MY(backend_data)
 207 #endif
 208
 209 #ifndef MY_bfd_final_link
 210
 211 /* Final link routine.  We need to use a call back to get the correct
 212    offsets in the output file.  */
 213
 214 static void final_link_callback
 215   PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
 216
 217 static void
 218 final_link_callback (abfd, ptreloff, pdreloff, psymoff)
 219      bfd *abfd;
 220      file_ptr *ptreloff;
 221      file_ptr *pdreloff;
 222      file_ptr *psymoff;
 223 {
 224   struct internal_exec *execp = exec_hdr (abfd);
 225
 226   *ptreloff = N_TRELOFF (*execp);
 227   *pdreloff = N_DRELOFF (*execp);
 228   *psymoff = N_SYMOFF (*execp);
 229 }
 230
 231 static boolean
 232 MY_bfd_final_link (abfd, info)
 233      bfd *abfd;
 234      struct bfd_link_info *info;
 235 {
 236   return NAME(aout,final_link) (abfd, info, final_link_callback);
 237 }
 238
 239 #endif
 240
 241 /* We assume BFD generic archive files.  */
 242 #ifndef MY_openr_next_archived_file
 243 #define MY_openr_next_archived_file     bfd_generic_openr_next_archived_file
 244 #endif
 245 #ifndef MY_generic_stat_arch_elt
 246 #define MY_generic_stat_arch_elt        bfd_generic_stat_arch_elt
 247 #endif
 248 #ifndef MY_slurp_armap
 249 #define MY_slurp_armap                  bfd_slurp_bsd_armap
 250 #endif
 251 #ifndef MY_slurp_extended_name_table
 252 #define MY_slurp_extended_name_table    _bfd_slurp_extended_name_table
 253 #endif
 254 #ifndef MY_write_armap
 255 #define MY_write_armap          bsd_write_armap
 256 #endif
 257 #ifndef MY_truncate_arname
 258 #define MY_truncate_arname              bfd_bsd_truncate_arname
 259 #endif
 260
 261 /* No core file defined here -- configure in trad-core.c separately.  */
 262 #ifndef MY_core_file_failing_command
 263 #define MY_core_file_failing_command _bfd_dummy_core_file_failing_command
 264 #endif
 265 #ifndef MY_core_file_failing_signal
 266 #define MY_core_file_failing_signal     _bfd_dummy_core_file_failing_signal
 267 #endif
 268 #ifndef MY_core_file_matches_executable_p
 269 #define MY_core_file_matches_executable_p       \
 270                                 _bfd_dummy_core_file_matches_executable_p
 271 #endif
 272 #ifndef MY_core_file_p
 273 #define MY_core_file_p          _bfd_dummy_target
 274 #endif
 275
 276 #ifndef MY_bfd_debug_info_start
 277 #define MY_bfd_debug_info_start         bfd_void
 278 #endif
 279 #ifndef MY_bfd_debug_info_end
 280 #define MY_bfd_debug_info_end           bfd_void
 281 #endif
 282 #ifndef MY_bfd_debug_info_accumulate
 283 #define MY_bfd_debug_info_accumulate    \
 284                         (void (*) PARAMS ((bfd*, struct sec *))) bfd_void
 285 #endif
 286
 287 #ifndef MY_core_file_failing_command
 288 #define MY_core_file_failing_command NAME(aout,core_file_failing_command)
 289 #endif
 290 #ifndef MY_core_file_failing_signal
 291 #define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
 292 #endif
 293 #ifndef MY_core_file_matches_executable_p
 294 #define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
 295 #endif
 296 #ifndef MY_slurp_armap
 297 #define MY_slurp_armap NAME(aout,slurp_armap)
 298 #endif
 299 #ifndef MY_slurp_extended_name_table
 300 #define MY_slurp_extended_name_table NAME(aout,slurp_extended_name_table)
 301 #endif
 302 #ifndef MY_truncate_arname
 303 #define MY_truncate_arname NAME(aout,truncate_arname)
 304 #endif
 305 #ifndef MY_write_armap
 306 #define MY_write_armap NAME(aout,write_armap)
 307 #endif
 308 #ifndef MY_close_and_cleanup
 309 #define MY_close_and_cleanup NAME(aout,close_and_cleanup)
 310 #endif
 311 #ifndef MY_set_section_contents
 312 #define MY_set_section_contents NAME(aout,set_section_contents)
 313 #endif
 314 #ifndef MY_get_section_contents
 315 #define MY_get_section_contents NAME(aout,get_section_contents)
 316 #endif
 317 #ifndef MY_new_section_hook
 318 #define MY_new_section_hook NAME(aout,new_section_hook)
 319 #endif
 320 #ifndef MY_get_symtab_upper_bound
 321 #define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
 322 #endif
 323 #ifndef MY_get_symtab
 324 #define MY_get_symtab NAME(aout,get_symtab)
 325 #endif
 326 #ifndef MY_get_reloc_upper_bound
 327 #define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
 328 #endif
 329 #ifndef MY_canonicalize_reloc
 330 #define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
 331 #endif
 332 #ifndef MY_make_empty_symbol
 333 #define MY_make_empty_symbol NAME(aout,make_empty_symbol)
 334 #endif
 335 #ifndef MY_print_symbol
 336 #define MY_print_symbol NAME(aout,print_symbol)
 337 #endif
 338 #ifndef MY_get_symbol_info
 339 #define MY_get_symbol_info NAME(aout,get_symbol_info)
 340 #endif
 341 #ifndef MY_get_lineno
 342 #define MY_get_lineno NAME(aout,get_lineno)
 343 #endif
 344 #ifndef MY_set_arch_mach
 345 #define MY_set_arch_mach NAME(aout,set_arch_mach)
 346 #endif
 347 #ifndef MY_openr_next_archived_file
 348 #define MY_openr_next_archived_file NAME(aout,openr_next_archived_file)
 349 #endif
 350 #ifndef MY_find_nearest_line
 351 #define MY_find_nearest_line NAME(aout,find_nearest_line)
 352 #endif
 353 #ifndef MY_generic_stat_arch_elt
 354 #define MY_generic_stat_arch_elt NAME(aout,generic_stat_arch_elt)
 355 #endif
 356 #ifndef MY_sizeof_headers
 357 #define MY_sizeof_headers NAME(aout,sizeof_headers)
 358 #endif
 359 #ifndef MY_bfd_get_relocated_section_contents
 360 #define MY_bfd_get_relocated_section_contents \
 361                         bfd_generic_get_relocated_section_contents
 362 #endif
 363 #ifndef MY_bfd_relax_section
 364 #define MY_bfd_relax_section bfd_generic_relax_section
 365 #endif
 366 #ifndef MY_bfd_reloc_type_lookup
 367 #define MY_bfd_reloc_type_lookup NAME(aout,reloc_type_lookup)
 368 #endif
 369 #ifndef MY_bfd_make_debug_symbol
 370 #define MY_bfd_make_debug_symbol 0
 371 #endif
 372 #ifndef MY_bfd_link_hash_table_create
 373 #define MY_bfd_link_hash_table_create NAME(aout,link_hash_table_create)
 374 #endif
 375 #ifndef MY_bfd_link_add_symbols
 376 #define MY_bfd_link_add_symbols NAME(aout,link_add_symbols)
 377 #endif
 378
 379 /* Aout symbols normally have leading underscores */
 380 #ifndef MY_symbol_leading_char
 381 #define MY_symbol_leading_char '_'
 382 #endif
 383
 384 /* Aout archives normally use spaces for padding */
 385 #ifndef AR_PAD_CHAR
 386 #define AR_PAD_CHAR ' '
 387 #endif
 388
 389 #ifndef MY_BFD_TARGET
 390 bfd_target MY(vec) =
 391 {
 392   TARGETNAME,           /* name */
 393   bfd_target_aout_flavour,
 394 #ifdef TARGET_IS_BIG_ENDIAN_P
 395   true,                         /* target byte order (big) */
 396   true,                         /* target headers byte order (big) */
 397 #else
 398   false,                        /* target byte order (little) */
 399   false,                        /* target headers byte order (little) */
 400 #endif
 401   (HAS_RELOC | EXEC_P |         /* object flags */
 402    HAS_LINENO | HAS_DEBUG |
 403    HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
 404   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 405   MY_symbol_leading_char,
 406   AR_PAD_CHAR,                  /* ar_pad_char */
 407   15,                           /* ar_max_namelen */
 408   3,                            /* minimum alignment */
 409 #ifdef TARGET_IS_BIG_ENDIAN_P
 410   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 411      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 412      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
 413   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
 414      bfd_getb32, bfd_getb_signed_32, bfd_putb32,
 415      bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
 416 #else
 417   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 418      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 419      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
 420   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
 421      bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 422      bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
 423 #endif
 424     {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
 425        bfd_generic_archive_p, MY_core_file_p},
 426     {bfd_false, MY_mkobject,    /* bfd_set_format */
 427        _bfd_generic_mkarchive, bfd_false},
 428     {bfd_false, MY_write_object_contents, /* bfd_write_contents */
 429        _bfd_write_archive_contents, bfd_false},
 430
 431   JUMP_TABLE (MY),
 432   (PTR) MY_backend_data,
 433 };
 434 #endif /* MY_BFD_TARGET */