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 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   exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
  97
  98   if (N_BADMAG (exec)) return 0;
  99
 100   NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
 101   target = NAME(aout,some_aout_object_p) (abfd, &exec, MY(callback));
 102
 103 #ifdef ENTRY_CAN_BE_ZERO
 104   /* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
 105    * means that it isn't obvious if EXEC_P should be set.
 106    * All of the following must be true for an executable:
 107    * There must be no relocations, the bfd can be neither an
 108    * archive nor an archive element, and the file must be executable. */
 109
 110   if (exec.a_trsize + exec.a_drsize == 0
 111       && bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
 112     {
 113       struct stat buf;
 114 #ifndef S_IXUSR
 115 #define S_IXUSR 0100    /* Execute by owner.  */
 116 #endif
 117       if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
 118         abfd->flags |= EXEC_P;
 119     }
 120 #endif /* ENTRY_CAN_BE_ZERO */
 121
 122   return target;
 123 }
 124 #define MY_object_p MY(object_p)
 125 #endif
 126
 127
 128 #ifndef MY_mkobject
 129 static boolean
 130 DEFUN(MY(mkobject),(abfd),
 131       bfd *abfd)
 132 {
 133   if (NAME(aout,mkobject)(abfd) == false)
 134     return false;
 135 #if 0 /* Sizes get set in set_sizes callback, later, after we know
 136          the architecture and machine.  */
 137   adata(abfd).page_size = PAGE_SIZE;
 138 #ifdef SEGMENT_SIZE
 139   adata(abfd).segment_size = SEGMENT_SIZE;
 140 #else
 141   adata(abfd).segment_size = PAGE_SIZE;
 142 #endif
 143   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 144 #endif
 145   return true;
 146 }
 147 #define MY_mkobject MY(mkobject)
 148 #endif
 149
 150 /* Write an object file.
 151    Section contents have already been written.  We write the
 152    file header, symbols, and relocation.  */
 153
 154 #ifndef MY_write_object_contents
 155 static boolean
 156 DEFUN(MY(write_object_contents),(abfd),
 157       bfd *abfd)
 158 {
 159   struct external_exec exec_bytes;
 160   struct internal_exec *execp = exec_hdr (abfd);
 161
 162 #if CHOOSE_RELOC_SIZE
 163   CHOOSE_RELOC_SIZE(abfd);
 164 #else
 165   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
 166 #endif
 167
 168   WRITE_HEADERS(abfd, execp);
 169
 170   return true;
 171 }
 172 #define MY_write_object_contents MY(write_object_contents)
 173 #endif
 174
 175 #ifndef MY_set_sizes
 176 static boolean
 177 DEFUN(MY(set_sizes),(abfd), bfd *abfd)
 178 {
 179   adata(abfd).page_size = PAGE_SIZE;
 180 #ifdef SEGMENT_SIZE
 181   adata(abfd).segment_size = SEGMENT_SIZE;
 182 #else
 183   adata(abfd).segment_size = PAGE_SIZE;
 184 #endif
 185   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 186   return true;
 187 }
 188 #define MY_set_sizes MY(set_sizes)
 189 #endif
 190
 191 #ifndef MY_backend_data
 192 static CONST struct aout_backend_data MY(backend_data) = {
 193   0,                            /* zmagic contiguous */
 194   0,                            /* text incl header */
 195   0,                            /* text vma? */
 196   MY_set_sizes,
 197   0,                            /* exec header is counted */
 198 };
 199 #define MY_backend_data &MY(backend_data)
 200 #endif
 201
 202 /* We assume BFD generic archive files.  */
 203 #ifndef MY_openr_next_archived_file
 204 #define MY_openr_next_archived_file     bfd_generic_openr_next_archived_file
 205 #endif
 206 #ifndef MY_generic_stat_arch_elt
 207 #define MY_generic_stat_arch_elt        bfd_generic_stat_arch_elt
 208 #endif
 209 #ifndef MY_slurp_armap
 210 #define MY_slurp_armap                  bfd_slurp_bsd_armap
 211 #endif
 212 #ifndef MY_slurp_extended_name_table
 213 #define MY_slurp_extended_name_table    _bfd_slurp_extended_name_table
 214 #endif
 215 #ifndef MY_write_armap
 216 #define MY_write_armap          bsd_write_armap
 217 #endif
 218 #ifndef MY_truncate_arname
 219 #define MY_truncate_arname              bfd_bsd_truncate_arname
 220 #endif
 221
 222 /* No core file defined here -- configure in trad-core.c separately.  */
 223 #ifndef MY_core_file_failing_command
 224 #define MY_core_file_failing_command _bfd_dummy_core_file_failing_command
 225 #endif
 226 #ifndef MY_core_file_failing_signal
 227 #define MY_core_file_failing_signal     _bfd_dummy_core_file_failing_signal
 228 #endif
 229 #ifndef MY_core_file_matches_executable_p
 230 #define MY_core_file_matches_executable_p       \
 231                                 _bfd_dummy_core_file_matches_executable_p
 232 #endif
 233 #ifndef MY_core_file_p
 234 #define MY_core_file_p          _bfd_dummy_target
 235 #endif
 236
 237 #ifndef MY_bfd_debug_info_start
 238 #define MY_bfd_debug_info_start         bfd_void
 239 #endif
 240 #ifndef MY_bfd_debug_info_end
 241 #define MY_bfd_debug_info_end           bfd_void
 242 #endif
 243 #ifndef MY_bfd_debug_info_accumulate
 244 #define MY_bfd_debug_info_accumulate    \
 245                         (void (*) PARAMS ((bfd*, struct sec *))) bfd_void
 246 #endif
 247
 248 #ifndef MY_core_file_failing_command
 249 #define MY_core_file_failing_command NAME(aout,core_file_failing_command)
 250 #endif
 251 #ifndef MY_core_file_failing_signal
 252 #define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
 253 #endif
 254 #ifndef MY_core_file_matches_executable_p
 255 #define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
 256 #endif
 257 #ifndef MY_slurp_armap
 258 #define MY_slurp_armap NAME(aout,slurp_armap)
 259 #endif
 260 #ifndef MY_slurp_extended_name_table
 261 #define MY_slurp_extended_name_table NAME(aout,slurp_extended_name_table)
 262 #endif
 263 #ifndef MY_truncate_arname
 264 #define MY_truncate_arname NAME(aout,truncate_arname)
 265 #endif
 266 #ifndef MY_write_armap
 267 #define MY_write_armap NAME(aout,write_armap)
 268 #endif
 269 #ifndef MY_close_and_cleanup
 270 #define MY_close_and_cleanup NAME(aout,close_and_cleanup)
 271 #endif
 272 #ifndef MY_set_section_contents
 273 #define MY_set_section_contents NAME(aout,set_section_contents)
 274 #endif
 275 #ifndef MY_get_section_contents
 276 #define MY_get_section_contents NAME(aout,get_section_contents)
 277 #endif
 278 #ifndef MY_new_section_hook
 279 #define MY_new_section_hook NAME(aout,new_section_hook)
 280 #endif
 281 #ifndef MY_get_symtab_upper_bound
 282 #define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
 283 #endif
 284 #ifndef MY_get_symtab
 285 #define MY_get_symtab NAME(aout,get_symtab)
 286 #endif
 287 #ifndef MY_get_reloc_upper_bound
 288 #define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
 289 #endif
 290 #ifndef MY_canonicalize_reloc
 291 #define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
 292 #endif
 293 #ifndef MY_make_empty_symbol
 294 #define MY_make_empty_symbol NAME(aout,make_empty_symbol)
 295 #endif
 296 #ifndef MY_print_symbol
 297 #define MY_print_symbol NAME(aout,print_symbol)
 298 #endif
 299 #ifndef MY_get_lineno
 300 #define MY_get_lineno NAME(aout,get_lineno)
 301 #endif
 302 #ifndef MY_set_arch_mach
 303 #define MY_set_arch_mach NAME(aout,set_arch_mach)
 304 #endif
 305 #ifndef MY_openr_next_archived_file
 306 #define MY_openr_next_archived_file NAME(aout,openr_next_archived_file)
 307 #endif
 308 #ifndef MY_find_nearest_line
 309 #define MY_find_nearest_line NAME(aout,find_nearest_line)
 310 #endif
 311 #ifndef MY_generic_stat_arch_elt
 312 #define MY_generic_stat_arch_elt NAME(aout,generic_stat_arch_elt)
 313 #endif
 314 #ifndef MY_sizeof_headers
 315 #define MY_sizeof_headers NAME(aout,sizeof_headers)
 316 #endif
 317 #ifndef MY_bfd_debug_info_start
 318 #define MY_bfd_debug_info_start NAME(aout,bfd_debug_info_start)
 319 #endif
 320 #ifndef MY_bfd_debug_info_end
 321 #define MY_bfd_debug_info_end NAME(aout,bfd_debug_info_end)
 322 #endif
 323 #ifndef MY_bfd_debug_info_accumulat
 324 #define MY_bfd_debug_info_accumulat NAME(aout,bfd_debug_info_accumulat)
 325 #endif
 326 #ifndef MY_reloc_howto_type_lookup
 327 #define MY_reloc_howto_type_lookup NAME(aout,reloc_type_lookup)
 328 #endif
 329 #ifndef MY_make_debug_symbol
 330 #define MY_make_debug_symbol 0
 331 #endif
 332
 333 /* Aout symbols normally have leading underscores */
 334 #ifndef MY_symbol_leading_char
 335 #define MY_symbol_leading_char '_'
 336 #endif
 337
 338 bfd_target MY(vec) =
 339 {
 340   TARGETNAME,           /* name */
 341   bfd_target_aout_flavour,
 342 #ifdef TARGET_IS_BIG_ENDIAN_P
 343   true,                         /* target byte order (big) */
 344   true,                         /* target headers byte order (big) */
 345 #else
 346   false,                        /* target byte order (little) */
 347   false,                        /* target headers byte order (little) */
 348 #endif
 349   (HAS_RELOC | EXEC_P |         /* object flags */
 350    HAS_LINENO | HAS_DEBUG |
 351    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
 352   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 353   MY_symbol_leading_char,
 354   ' ',                          /* ar_pad_char */
 355   15,                           /* ar_max_namelen */
 356   1,                            /* minimum alignment */
 357 #ifdef TARGET_IS_BIG_ENDIAN_P
 358   _do_getb64, _do_putb64,       _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
 359   _do_getb64, _do_putb64,       _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
 360 #else
 361   _do_getl64, _do_putl64,       _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
 362   _do_getl64, _do_putl64,       _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* hdrs */
 363 #endif
 364     {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
 365        bfd_generic_archive_p, MY_core_file_p},
 366     {bfd_false, MY_mkobject,    /* bfd_set_format */
 367        _bfd_generic_mkarchive, bfd_false},
 368     {bfd_false, MY_write_object_contents, /* bfd_write_contents */
 369        _bfd_write_archive_contents, bfd_false},
 370
 371   MY_core_file_failing_command,
 372   MY_core_file_failing_signal,
 373   MY_core_file_matches_executable_p,
 374   MY_slurp_armap,
 375   MY_slurp_extended_name_table,
 376   MY_truncate_arname,
 377   MY_write_armap,
 378   MY_close_and_cleanup,
 379   MY_set_section_contents,
 380   MY_get_section_contents,
 381   MY_new_section_hook,
 382   MY_get_symtab_upper_bound,
 383   MY_get_symtab,
 384   MY_get_reloc_upper_bound,
 385   MY_canonicalize_reloc,
 386   MY_make_empty_symbol,
 387   MY_print_symbol,
 388   MY_get_lineno,
 389   MY_set_arch_mach,
 390   MY_openr_next_archived_file,
 391   MY_find_nearest_line,
 392   MY_generic_stat_arch_elt,
 393   MY_sizeof_headers,
 394   MY_bfd_debug_info_start,
 395   MY_bfd_debug_info_end,
 396   MY_bfd_debug_info_accumulate,
 397   bfd_generic_get_relocated_section_contents,
 398   bfd_generic_relax_section,
 399   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* COFF stuff?! */
 400   MY_reloc_howto_type_lookup,
 401   MY_make_debug_symbol,
 402   (PTR) MY_backend_data,
 403 };