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   struct aout_backend_data *abdp;
  33
  34   /* Calculate the file positions of the parts of a newly read aout header */
  35   obj_textsec (abfd)->_raw_size = N_TXTSIZE(*execp);
  36
  37   /* The virtual memory addresses of the sections */
  38   obj_textsec (abfd)->vma = N_TXTADDR(*execp);
  39   obj_datasec (abfd)->vma = N_DATADDR(*execp);
  40   obj_bsssec  (abfd)->vma = N_BSSADDR(*execp);
  41
  42   /* The file offsets of the sections */
  43   obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
  44   obj_datasec (abfd)->filepos = N_DATOFF (*execp);
  45
  46   /* The file offsets of the relocation info */
  47   obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
  48   obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
  49
  50   /* The file offsets of the string table and symbol table.  */
  51   obj_sym_filepos (abfd) = N_SYMOFF (*execp);
  52   obj_str_filepos (abfd) = N_STROFF (*execp);
  53
  54   /* Determine the architecture and machine type of the object file.  */
  55 #ifdef SET_ARCH_MACH
  56   SET_ARCH_MACH(abfd, *execp);
  57 #else
  58   bfd_default_set_arch_mach(abfd, DEFAULT_ARCH, 0);
  59 #endif
  60
  61   /* Don't set sizes now -- can't be sure until we know arch & mach.
  62      Sizes get set in set_sizes callback, later.  */
  63 #if 0
  64   adata(abfd).page_size = PAGE_SIZE;
  65 #ifdef SEGMENT_SIZE
  66   adata(abfd).segment_size = SEGMENT_SIZE;
  67 #else
  68   adata(abfd).segment_size = PAGE_SIZE;
  69 #endif
  70   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
  71 #endif
  72
  73   return abfd->xvec;
  74 }
  75
  76 #ifndef MY_object_p
  77 /* Finish up the reading of an a.out file header */
  78
  79 static bfd_target *
  80 DEFUN(MY(object_p),(abfd),
  81      bfd *abfd)
  82 {
  83   struct external_exec exec_bytes;      /* Raw exec header from file */
  84   struct internal_exec exec;            /* Cleaned-up exec header */
  85   bfd_target *target;
  86
  87   if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
  88       != EXEC_BYTES_SIZE) {
  89     bfd_error = wrong_format;
  90     return 0;
  91   }
  92
  93   exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
  94
  95   if (N_BADMAG (exec)) return 0;
  96
  97   NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
  98   target = NAME(aout,some_aout_object_p) (abfd, &exec, MY(callback));
  99
 100 #ifdef ENTRY_CAN_BE_ZERO
 101   /* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
 102    * means that it isn't obvious if EXEC_P should be set.
 103    * All of the following must be true for an executable:
 104    * There must be no relocations, the bfd can be neither an
 105    * archive nor an archive element, and the file must be executable. */
 106
 107   if (exec.a_trsize + exec.a_drsize == 0
 108       && bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
 109     {
 110       struct stat buf;
 111 #ifndef S_IXUSR
 112 #define S_IXUSR 0100    /* Execute by owner.  */
 113 #endif
 114       if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
 115         abfd->flags |= EXEC_P;
 116     }
 117 #endif /* ENTRY_CAN_BE_ZERO */
 118
 119   return target;
 120 }
 121 #define MY_object_p MY(object_p)
 122 #endif
 123
 124
 125 #ifndef MY_mkobject
 126 static boolean
 127 DEFUN(MY(mkobject),(abfd),
 128       bfd *abfd)
 129 {
 130   if (NAME(aout,mkobject)(abfd) == false)
 131     return false;
 132 #if 0 /* Sizes get set in set_sizes callback, later, after we know
 133          the architecture and machine.  */
 134   adata(abfd).page_size = PAGE_SIZE;
 135 #ifdef SEGMENT_SIZE
 136   adata(abfd).segment_size = SEGMENT_SIZE;
 137 #else
 138   adata(abfd).segment_size = PAGE_SIZE;
 139 #endif
 140   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 141 #endif
 142   return true;
 143 }
 144 #define MY_mkobject MY(mkobject)
 145 #endif
 146
 147 /* Write an object file.
 148    Section contents have already been written.  We write the
 149    file header, symbols, and relocation.  */
 150
 151 #ifndef MY_write_object_contents
 152 static boolean
 153 DEFUN(MY(write_object_contents),(abfd),
 154       bfd *abfd)
 155 {
 156   bfd_size_type data_pad = 0;
 157   struct external_exec exec_bytes;
 158   struct internal_exec *execp = exec_hdr (abfd);
 159
 160 #if CHOOSE_RELOC_SIZE
 161   CHOOSE_RELOC_SIZE(abfd);
 162 #else
 163   obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
 164 #endif
 165
 166   WRITE_HEADERS(abfd, execp);
 167
 168   return true;
 169 }
 170 #define MY_write_object_contents MY(write_object_contents)
 171 #endif
 172
 173 #ifndef MY_set_sizes
 174 static boolean
 175 DEFUN(MY(set_sizes),(abfd), bfd *abfd)
 176 {
 177   adata(abfd).page_size = PAGE_SIZE;
 178 #ifdef SEGMENT_SIZE
 179   adata(abfd).segment_size = SEGMENT_SIZE;
 180 #else
 181   adata(abfd).segment_size = PAGE_SIZE;
 182 #endif
 183   adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
 184   return true;
 185 }
 186 #define MY_set_sizes MY(set_sizes)
 187 #endif
 188
 189 #ifndef MY_backend_data
 190 static CONST struct aout_backend_data MY(backend_data) = {
 191   0,                            /* zmagic contiguous */
 192   0,                            /* text incl header */
 193   0,                            /* text vma? */
 194   MY_set_sizes,
 195 };
 196 #define MY_backend_data &MY(backend_data)
 197 #endif
 198
 199 /* We assume BFD generic archive files.  */
 200 #ifndef MY_openr_next_archived_file
 201 #define MY_openr_next_archived_file     bfd_generic_openr_next_archived_file
 202 #endif
 203 #ifndef MY_generic_stat_arch_elt
 204 #define MY_generic_stat_arch_elt        bfd_generic_stat_arch_elt
 205 #endif
 206 #ifndef MY_slurp_armap
 207 #define MY_slurp_armap                  bfd_slurp_bsd_armap
 208 #endif
 209 #ifndef MY_slurp_extended_name_table
 210 #define MY_slurp_extended_name_table    _bfd_slurp_extended_name_table
 211 #endif
 212 #ifndef MY_write_armap
 213 #define MY_write_armap          bsd_write_armap
 214 #endif
 215 #ifndef MY_truncate_arname
 216 #define MY_truncate_arname              bfd_bsd_truncate_arname
 217 #endif
 218
 219 /* No core file defined here -- configure in trad-core.c separately.  */
 220 #ifndef MY_core_file_failing_command
 221 #define MY_core_file_failing_command _bfd_dummy_core_file_failing_command
 222 #endif
 223 #ifndef MY_core_file_failing_signal
 224 #define MY_core_file_failing_signal     _bfd_dummy_core_file_failing_signal
 225 #endif
 226 #ifndef MY_core_file_matches_executable_p
 227 #define MY_core_file_matches_executable_p       \
 228                                 _bfd_dummy_core_file_matches_executable_p
 229 #endif
 230 #ifndef MY_core_file_p
 231 #define MY_core_file_p          _bfd_dummy_target
 232 #endif
 233
 234 #ifndef MY_bfd_debug_info_start
 235 #define MY_bfd_debug_info_start         bfd_void
 236 #endif
 237 #ifndef MY_bfd_debug_info_end
 238 #define MY_bfd_debug_info_end           bfd_void
 239 #endif
 240 #ifndef MY_bfd_debug_info_accumulate
 241 #define MY_bfd_debug_info_accumulate    (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
 242 #endif
 243
 244 #ifndef MY_core_file_failing_command
 245 #define MY_core_file_failing_command NAME(aout,core_file_failing_command)
 246 #endif
 247 #ifndef MY_core_file_failing_signal
 248 #define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
 249 #endif
 250 #ifndef MY_core_file_matches_executable_p
 251 #define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
 252 #endif
 253 #ifndef MY_slurp_armap
 254 #define MY_slurp_armap NAME(aout,slurp_armap)
 255 #endif
 256 #ifndef MY_slurp_extended_name_table
 257 #define MY_slurp_extended_name_table NAME(aout,slurp_extended_name_table)
 258 #endif
 259 #ifndef MY_truncate_arname
 260 #define MY_truncate_arname NAME(aout,truncate_arname)
 261 #endif
 262 #ifndef MY_write_armap
 263 #define MY_write_armap NAME(aout,write_armap)
 264 #endif
 265 #ifndef MY_close_and_cleanup
 266 #define MY_close_and_cleanup NAME(aout,close_and_cleanup)
 267 #endif
 268 #ifndef MY_set_section_contents
 269 #define MY_set_section_contents NAME(aout,set_section_contents)
 270 #endif
 271 #ifndef MY_get_section_contents
 272 #define MY_get_section_contents NAME(aout,get_section_contents)
 273 #endif
 274 #ifndef MY_new_section_hook
 275 #define MY_new_section_hook NAME(aout,new_section_hook)
 276 #endif
 277 #ifndef MY_get_symtab_upper_bound
 278 #define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
 279 #endif
 280 #ifndef MY_get_symtab
 281 #define MY_get_symtab NAME(aout,get_symtab)
 282 #endif
 283 #ifndef MY_get_reloc_upper_bound
 284 #define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
 285 #endif
 286 #ifndef MY_canonicalize_reloc
 287 #define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
 288 #endif
 289 #ifndef MY_make_empty_symbol
 290 #define MY_make_empty_symbol NAME(aout,make_empty_symbol)
 291 #endif
 292 #ifndef MY_print_symbol
 293 #define MY_print_symbol NAME(aout,print_symbol)
 294 #endif
 295 #ifndef MY_get_lineno
 296 #define MY_get_lineno NAME(aout,get_lineno)
 297 #endif
 298 #ifndef MY_set_arch_mach
 299 #define MY_set_arch_mach NAME(aout,set_arch_mach)
 300 #endif
 301 #ifndef MY_openr_next_archived_file
 302 #define MY_openr_next_archived_file NAME(aout,openr_next_archived_file)
 303 #endif
 304 #ifndef MY_find_nearest_line
 305 #define MY_find_nearest_line NAME(aout,find_nearest_line)
 306 #endif
 307 #ifndef MY_generic_stat_arch_elt
 308 #define MY_generic_stat_arch_elt NAME(aout,generic_stat_arch_elt)
 309 #endif
 310 #ifndef MY_sizeof_headers
 311 #define MY_sizeof_headers NAME(aout,sizeof_headers)
 312 #endif
 313 #ifndef MY_bfd_debug_info_start
 314 #define MY_bfd_debug_info_start NAME(aout,bfd_debug_info_start)
 315 #endif
 316 #ifndef MY_bfd_debug_info_end
 317 #define MY_bfd_debug_info_end NAME(aout,bfd_debug_info_end)
 318 #endif
 319 #ifndef MY_bfd_debug_info_accumulat
 320 #define MY_bfd_debug_info_accumulat NAME(aout,bfd_debug_info_accumulat)
 321 #endif
 322 #ifndef MY_reloc_howto_type_lookup
 323 #define MY_reloc_howto_type_lookup 0
 324 #endif
 325 #ifndef MY_make_debug_symbol
 326 #define MY_make_debug_symbol 0
 327 #endif
 328
 329 /* Aout symbols normally have leading underscores */
 330 #ifndef MY_symbol_leading_char
 331 #define MY_symbol_leading_char '_'
 332 #endif
 333
 334 bfd_target MY(vec) =
 335 {
 336   TARGETNAME,           /* name */
 337   bfd_target_aout_flavour,
 338 #ifdef TARGET_IS_BIG_ENDIAN_P
 339   true,                         /* target byte order (big) */
 340   true,                         /* target headers byte order (big) */
 341 #else
 342   false,                        /* target byte order (little) */
 343   false,                        /* target headers byte order (little) */
 344 #endif
 345   (HAS_RELOC | EXEC_P |         /* object flags */
 346    HAS_LINENO | HAS_DEBUG |
 347    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
 348   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 349   MY_symbol_leading_char,
 350   ' ',                          /* ar_pad_char */
 351   15,                           /* ar_max_namelen */
 352   1,                            /* minimum alignment */
 353 #ifdef TARGET_IS_BIG_ENDIAN_P
 354   _do_getb64, _do_putb64,       _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
 355   _do_getb64, _do_putb64,       _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
 356 #else
 357   _do_getl64, _do_putl64,       _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
 358   _do_getl64, _do_putl64,       _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* hdrs */
 359 #endif
 360     {_bfd_dummy_target, MY_object_p, /* bfd_check_format */
 361        bfd_generic_archive_p, MY_core_file_p},
 362     {bfd_false, MY_mkobject,    /* bfd_set_format */
 363        _bfd_generic_mkarchive, bfd_false},
 364     {bfd_false, MY_write_object_contents, /* bfd_write_contents */
 365        _bfd_write_archive_contents, bfd_false},
 366
 367   MY_core_file_failing_command,
 368   MY_core_file_failing_signal,
 369   MY_core_file_matches_executable_p,
 370   MY_slurp_armap,
 371   MY_slurp_extended_name_table,
 372   MY_truncate_arname,
 373   MY_write_armap,
 374   MY_close_and_cleanup,
 375   MY_set_section_contents,
 376   MY_get_section_contents,
 377   MY_new_section_hook,
 378   MY_get_symtab_upper_bound,
 379   MY_get_symtab,
 380   MY_get_reloc_upper_bound,
 381   MY_canonicalize_reloc,
 382   MY_make_empty_symbol,
 383   MY_print_symbol,
 384   MY_get_lineno,
 385   MY_set_arch_mach,
 386   MY_openr_next_archived_file,
 387   MY_find_nearest_line,
 388   MY_generic_stat_arch_elt,
 389   MY_sizeof_headers,
 390   MY_bfd_debug_info_start,
 391   MY_bfd_debug_info_end,
 392   MY_bfd_debug_info_accumulate,
 393   bfd_generic_get_relocated_section_contents,
 394   bfd_generic_relax_section,
 395   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* COFF stuff?! */
 396   MY_reloc_howto_type_lookup,
 397   MY_make_debug_symbol,
 398   (PTR) MY_backend_data,
 399 };