bfd/pef.c

   1 /* PEF support for BFD.
   2    Copyright (C) 1999-2024 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21 /* PEF (Preferred Executable Format) is the binary file format for late
  22    classic Mac OS versions (before Darwin).  It is supported by both m68k
  23    and PowerPc.  It is also called CFM (Code Fragment Manager).  */
  24
  25 #include "sysdep.h"
  26 #include "safe-ctype.h"
  27 #include "pef.h"
  28 #include "pef-traceback.h"
  29 #include "bfd.h"
  30 #include "libbfd.h"
  31 #include "libiberty.h"
  32
  33 #ifndef BFD_IO_FUNCS
  34 #define BFD_IO_FUNCS 0
  35 #endif
  36
  37 #define bfd_pef_close_and_cleanup                   _bfd_generic_close_and_cleanup
  38 #define bfd_pef_bfd_free_cached_info                _bfd_generic_bfd_free_cached_info
  39 #define bfd_pef_new_section_hook                    _bfd_generic_new_section_hook
  40 #define bfd_pef_bfd_is_local_label_name             bfd_generic_is_local_label_name
  41 #define bfd_pef_bfd_is_target_special_symbol        _bfd_bool_bfd_asymbol_false
  42 #define bfd_pef_get_lineno                          _bfd_nosymbols_get_lineno
  43 #define bfd_pef_find_nearest_line                   _bfd_nosymbols_find_nearest_line
  44 #define bfd_pef_find_nearest_line_with_alt          _bfd_nosymbols_find_nearest_line_with_alt
  45 #define bfd_pef_find_line                           _bfd_nosymbols_find_line
  46 #define bfd_pef_find_inliner_info                   _bfd_nosymbols_find_inliner_info
  47 #define bfd_pef_get_symbol_version_string           _bfd_nosymbols_get_symbol_version_string
  48 #define bfd_pef_bfd_make_debug_symbol               _bfd_nosymbols_bfd_make_debug_symbol
  49 #define bfd_pef_read_minisymbols                    _bfd_generic_read_minisymbols
  50 #define bfd_pef_minisymbol_to_symbol                _bfd_generic_minisymbol_to_symbol
  51 #define bfd_pef_set_arch_mach                       _bfd_generic_set_arch_mach
  52 #define bfd_pef_get_section_contents                _bfd_generic_get_section_contents
  53 #define bfd_pef_set_section_contents                _bfd_generic_set_section_contents
  54 #define bfd_pef_bfd_get_relocated_section_contents  bfd_generic_get_relocated_section_contents
  55 #define bfd_pef_bfd_relax_section                   bfd_generic_relax_section
  56 #define bfd_pef_bfd_gc_sections                     bfd_generic_gc_sections
  57 #define bfd_pef_bfd_lookup_section_flags            bfd_generic_lookup_section_flags
  58 #define bfd_pef_bfd_merge_sections                  bfd_generic_merge_sections
  59 #define bfd_pef_bfd_is_group_section                bfd_generic_is_group_section
  60 #define bfd_pef_bfd_group_name                      bfd_generic_group_name
  61 #define bfd_pef_bfd_discard_group                   bfd_generic_discard_group
  62 #define bfd_pef_section_already_linked              _bfd_generic_section_already_linked
  63 #define bfd_pef_bfd_define_common_symbol            bfd_generic_define_common_symbol
  64 #define bfd_pef_bfd_link_hide_symbol                _bfd_generic_link_hide_symbol
  65 #define bfd_pef_bfd_define_start_stop               bfd_generic_define_start_stop
  66 #define bfd_pef_bfd_link_hash_table_create          _bfd_generic_link_hash_table_create
  67 #define bfd_pef_bfd_link_add_symbols                _bfd_generic_link_add_symbols
  68 #define bfd_pef_bfd_link_just_syms                  _bfd_generic_link_just_syms
  69 #define bfd_pef_bfd_copy_link_hash_symbol_type \
  70   _bfd_generic_copy_link_hash_symbol_type
  71 #define bfd_pef_bfd_final_link                      _bfd_generic_final_link
  72 #define bfd_pef_bfd_link_split_section              _bfd_generic_link_split_section
  73 #define bfd_pef_bfd_link_check_relocs               _bfd_generic_link_check_relocs
  74
  75 static int
  76 bfd_pef_parse_traceback_table (bfd *abfd,
  77                                asection *section,
  78                                unsigned char *buf,
  79                                size_t len,
  80                                size_t pos,
  81                                asymbol *sym,
  82                                FILE *file)
  83 {
  84   struct traceback_table table;
  85   size_t offset;
  86   const char *s;
  87   asymbol tmpsymbol;
  88
  89   if (sym == NULL)
  90     sym = & tmpsymbol;
  91
  92   sym->name = NULL;
  93   sym->value = 0;
  94   sym->the_bfd = abfd;
  95   sym->section = section;
  96   sym->flags = 0;
  97   sym->udata.i = 0;
  98
  99   /* memcpy is fine since all fields are unsigned char.  */
 100   if ((pos + 8) > len)
 101     return -1;
 102   memcpy (&table, buf + pos, 8);
 103
 104   /* Calling code relies on returned symbols having a name and
 105      correct offset.  */
 106   if ((table.lang != TB_C) && (table.lang != TB_CPLUSPLUS))
 107     return -1;
 108
 109   if (! (table.flags2 & TB_NAME_PRESENT))
 110     return -1;
 111
 112   if (! (table.flags1 & TB_HAS_TBOFF))
 113     return -1;
 114
 115   offset = 8;
 116
 117   if ((table.flags5 & TB_FLOATPARAMS) || (table.fixedparams))
 118     offset += 4;
 119
 120   if (table.flags1 & TB_HAS_TBOFF)
 121     {
 122       struct traceback_table_tboff off;
 123
 124       if ((pos + offset + 4) > len)
 125         return -1;
 126       off.tb_offset = bfd_getb32 (buf + pos + offset);
 127       offset += 4;
 128
 129       /* Need to subtract 4 because the offset includes the 0x0L
 130          preceding the table.  */
 131       if (file != NULL)
 132         fprintf (file, " [offset = 0x%lx]", off.tb_offset);
 133
 134       if ((file == NULL) && ((off.tb_offset + 4) > (pos + offset)))
 135         return -1;
 136
 137       sym->value = pos - off.tb_offset - 4;
 138     }
 139
 140   if (table.flags2 & TB_INT_HNDL)
 141     offset += 4;
 142
 143   if (table.flags1 & TB_HAS_CTL)
 144     {
 145       struct traceback_table_anchors anchors;
 146
 147       if ((pos + offset + 4) > len)
 148         return -1;
 149       anchors.ctl_info = bfd_getb32 (buf + pos + offset);
 150       offset += 4;
 151
 152       if (anchors.ctl_info > 1024)
 153         return -1;
 154
 155       offset += anchors.ctl_info * 4;
 156     }
 157
 158   if (table.flags2 & TB_NAME_PRESENT)
 159     {
 160       struct traceback_table_routine name;
 161       char *namebuf;
 162
 163       if ((pos + offset + 2) > len)
 164         return -1;
 165       name.name_len = bfd_getb16 (buf + pos + offset);
 166       offset += 2;
 167
 168       if (name.name_len > 4096)
 169         return -1;
 170
 171       if ((pos + offset + name.name_len) > len)
 172         return -1;
 173
 174       namebuf = bfd_alloc (abfd, name.name_len + 1);
 175       if (namebuf == NULL)
 176         return -1;
 177
 178       memcpy (namebuf, buf + pos + offset, name.name_len);
 179       namebuf[name.name_len] = '\0';
 180
 181       /* Strip leading period inserted by compiler.  */
 182       if (namebuf[0] == '.')
 183         memmove (namebuf, namebuf + 1, name.name_len);
 184
 185       sym->name = namebuf;
 186
 187       for (s = sym->name; (*s != '\0'); s++)
 188         if (! ISPRINT (*s))
 189           return -1;
 190
 191       offset += name.name_len;
 192     }
 193
 194   if (table.flags2 & TB_USES_ALLOCA)
 195     offset += 4;
 196
 197   if (table.flags4 & TB_HAS_VEC_INFO)
 198     offset += 4;
 199
 200   if (file != NULL)
 201     fprintf (file, " [length = 0x%lx]", (unsigned long) offset);
 202
 203   return offset;
 204 }
 205
 206 static void
 207 bfd_pef_print_symbol (bfd *abfd,
 208                       void * afile,
 209                       asymbol *symbol,
 210                       bfd_print_symbol_type how)
 211 {
 212   FILE *file = (FILE *) afile;
 213   const char *symname = (symbol->name != bfd_symbol_error_name
 214                          ? symbol->name : _("<corrupt>"));
 215
 216   switch (how)
 217     {
 218     case bfd_print_symbol_name:
 219       fprintf (file, "%s", symname);
 220       break;
 221     default:
 222       bfd_print_symbol_vandf (abfd, (void *) file, symbol);
 223       fprintf (file, " %-5s %s", symbol->section->name, symname);
 224       if (startswith (symname, "__traceback_"))
 225         {
 226           unsigned char *buf;
 227           size_t offset = symbol->value + 4;
 228           size_t len = symbol->udata.i;
 229
 230           buf = bfd_malloc (len);
 231           if (buf == NULL
 232               || !bfd_get_section_contents (abfd, symbol->section, buf,
 233                                             offset, len)
 234               || bfd_pef_parse_traceback_table (abfd, symbol->section, buf,
 235                                                 len, 0, NULL, file) < 0)
 236             fprintf (file, " [ERROR]");
 237           free (buf);
 238         }
 239     }
 240 }
 241
 242 static void
 243 bfd_pef_convert_architecture (unsigned long architecture,
 244                               enum bfd_architecture *type,
 245                               unsigned long *subtype)
 246 {
 247   const unsigned long ARCH_POWERPC = 0x70777063; /* 'pwpc'.  */
 248   const unsigned long ARCH_M68K = 0x6d36386b; /* 'm68k'.  */
 249
 250   *subtype = bfd_arch_unknown;
 251   *type = bfd_arch_unknown;
 252
 253   if (architecture == ARCH_POWERPC)
 254     *type = bfd_arch_powerpc;
 255   else if (architecture == ARCH_M68K)
 256     *type = bfd_arch_m68k;
 257 }
 258
 259 static bool
 260 bfd_pef_mkobject (bfd *abfd ATTRIBUTE_UNUSED)
 261 {
 262   return true;
 263 }
 264
 265 static const char *bfd_pef_section_name (bfd_pef_section *section)
 266 {
 267   switch (section->section_kind)
 268     {
 269     case BFD_PEF_SECTION_CODE: return "code";
 270     case BFD_PEF_SECTION_UNPACKED_DATA: return "unpacked-data";
 271     case BFD_PEF_SECTION_PACKED_DATA: return "packed-data";
 272     case BFD_PEF_SECTION_CONSTANT: return "constant";
 273     case BFD_PEF_SECTION_LOADER: return "loader";
 274     case BFD_PEF_SECTION_DEBUG: return "debug";
 275     case BFD_PEF_SECTION_EXEC_DATA: return "exec-data";
 276     case BFD_PEF_SECTION_EXCEPTION: return "exception";
 277     case BFD_PEF_SECTION_TRACEBACK: return "traceback";
 278     default: return "unknown";
 279     }
 280 }
 281
 282 static unsigned long bfd_pef_section_flags (bfd_pef_section *section)
 283 {
 284   switch (section->section_kind)
 285     {
 286     case BFD_PEF_SECTION_CODE:
 287       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
 288     case BFD_PEF_SECTION_UNPACKED_DATA:
 289     case BFD_PEF_SECTION_PACKED_DATA:
 290     case BFD_PEF_SECTION_CONSTANT:
 291     case BFD_PEF_SECTION_LOADER:
 292     case BFD_PEF_SECTION_DEBUG:
 293     case BFD_PEF_SECTION_EXEC_DATA:
 294     case BFD_PEF_SECTION_EXCEPTION:
 295     case BFD_PEF_SECTION_TRACEBACK:
 296     default:
 297       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
 298     }
 299 }
 300
 301 static asection *
 302 bfd_pef_make_bfd_section (bfd *abfd, bfd_pef_section *section)
 303 {
 304   asection *bfdsec;
 305   const char *name = bfd_pef_section_name (section);
 306
 307   bfdsec = bfd_make_section_anyway (abfd, name);
 308   if (bfdsec == NULL)
 309     return NULL;
 310
 311   bfdsec->vma = section->default_address + section->container_offset;
 312   bfdsec->lma = section->default_address + section->container_offset;
 313   bfdsec->size = section->container_length;
 314   bfdsec->filepos = section->container_offset;
 315   bfdsec->alignment_power = section->alignment;
 316
 317   bfdsec->flags = bfd_pef_section_flags (section);
 318
 319   return bfdsec;
 320 }
 321
 322 int
 323 bfd_pef_parse_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 324                              unsigned char *buf,
 325                              size_t len,
 326                              bfd_pef_loader_header *header)
 327 {
 328   BFD_ASSERT (len == 56);
 329
 330   header->main_section = bfd_getb32 (buf);
 331   header->main_offset = bfd_getb32 (buf + 4);
 332   header->init_section = bfd_getb32 (buf + 8);
 333   header->init_offset = bfd_getb32 (buf + 12);
 334   header->term_section = bfd_getb32 (buf + 16);
 335   header->term_offset = bfd_getb32 (buf + 20);
 336   header->imported_library_count = bfd_getb32 (buf + 24);
 337   header->total_imported_symbol_count = bfd_getb32 (buf + 28);
 338   header->reloc_section_count = bfd_getb32 (buf + 32);
 339   header->reloc_instr_offset = bfd_getb32 (buf + 36);
 340   header->loader_strings_offset = bfd_getb32 (buf + 40);
 341   header->export_hash_offset = bfd_getb32 (buf + 44);
 342   header->export_hash_table_power = bfd_getb32 (buf + 48);
 343   header->exported_symbol_count = bfd_getb32 (buf + 52);
 344
 345   return 0;
 346 }
 347
 348 int
 349 bfd_pef_parse_imported_library (bfd *abfd ATTRIBUTE_UNUSED,
 350                                 unsigned char *buf,
 351                                 size_t len,
 352                                 bfd_pef_imported_library *header)
 353 {
 354   BFD_ASSERT (len == 24);
 355
 356   header->name_offset = bfd_getb32 (buf);
 357   header->old_implementation_version = bfd_getb32 (buf + 4);
 358   header->current_version = bfd_getb32 (buf + 8);
 359   header->imported_symbol_count = bfd_getb32 (buf + 12);
 360   header->first_imported_symbol = bfd_getb32 (buf + 16);
 361   header->options = buf[20];
 362   header->reserved_a = buf[21];
 363   header->reserved_b = bfd_getb16 (buf + 22);
 364
 365   return 0;
 366 }
 367
 368 int
 369 bfd_pef_parse_imported_symbol (bfd *abfd ATTRIBUTE_UNUSED,
 370                                unsigned char *buf,
 371                                size_t len,
 372                                bfd_pef_imported_symbol *symbol)
 373 {
 374   unsigned long value;
 375
 376   BFD_ASSERT (len == 4);
 377
 378   value = bfd_getb32 (buf);
 379   symbol->symbol_class = value >> 24;
 380   symbol->name = value & 0x00ffffff;
 381
 382   return 0;
 383 }
 384
 385 int
 386 bfd_pef_scan_section (bfd *abfd, bfd_pef_section *section)
 387 {
 388   unsigned char buf[28];
 389
 390   if (bfd_seek (abfd, section->header_offset, SEEK_SET) != 0
 391       || bfd_read (buf, 28, abfd) != 28)
 392     return -1;
 393
 394   section->name_offset = bfd_h_get_32 (abfd, buf);
 395   section->default_address = bfd_h_get_32 (abfd, buf + 4);
 396   section->total_length = bfd_h_get_32 (abfd, buf + 8);
 397   section->unpacked_length = bfd_h_get_32 (abfd, buf + 12);
 398   section->container_length = bfd_h_get_32 (abfd, buf + 16);
 399   section->container_offset = bfd_h_get_32 (abfd, buf + 20);
 400   section->section_kind = buf[24];
 401   section->share_kind = buf[25];
 402   section->alignment = buf[26];
 403   section->reserved = buf[27];
 404
 405   section->bfd_section = bfd_pef_make_bfd_section (abfd, section);
 406   if (section->bfd_section == NULL)
 407     return -1;
 408
 409   return 0;
 410 }
 411
 412 void
 413 bfd_pef_print_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 414                              bfd_pef_loader_header *header,
 415                              FILE *file)
 416 {
 417   fprintf (file, "main_section: %ld\n", header->main_section);
 418   fprintf (file, "main_offset: %lu\n", header->main_offset);
 419   fprintf (file, "init_section: %ld\n", header->init_section);
 420   fprintf (file, "init_offset: %lu\n", header->init_offset);
 421   fprintf (file, "term_section: %ld\n", header->term_section);
 422   fprintf (file, "term_offset: %lu\n", header->term_offset);
 423   fprintf (file, "imported_library_count: %lu\n",
 424            header->imported_library_count);
 425   fprintf (file, "total_imported_symbol_count: %lu\n",
 426            header->total_imported_symbol_count);
 427   fprintf (file, "reloc_section_count: %lu\n", header->reloc_section_count);
 428   fprintf (file, "reloc_instr_offset: %lu\n", header->reloc_instr_offset);
 429   fprintf (file, "loader_strings_offset: %lu\n",
 430            header->loader_strings_offset);
 431   fprintf (file, "export_hash_offset: %lu\n", header->export_hash_offset);
 432   fprintf (file, "export_hash_table_power: %lu\n",
 433            header->export_hash_table_power);
 434   fprintf (file, "exported_symbol_count: %lu\n",
 435            header->exported_symbol_count);
 436 }
 437
 438 int
 439 bfd_pef_print_loader_section (bfd *abfd, FILE *file)
 440 {
 441   bfd_pef_loader_header header;
 442   asection *loadersec = NULL;
 443   unsigned char *loaderbuf = NULL;
 444   size_t loaderlen = 0;
 445
 446   loadersec = bfd_get_section_by_name (abfd, "loader");
 447   if (loadersec == NULL)
 448     return -1;
 449
 450   loaderlen = loadersec->size;
 451   if (loaderlen < 56)
 452     return -1;
 453   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) != 0)
 454     return -1;
 455   loaderbuf = _bfd_malloc_and_read (abfd, loaderlen, loaderlen);
 456   if (loaderbuf == NULL)
 457     return -1;
 458
 459   if (bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header) < 0)
 460     {
 461       free (loaderbuf);
 462       return -1;
 463     }
 464
 465   bfd_pef_print_loader_header (abfd, &header, file);
 466   return 0;
 467 }
 468
 469 int
 470 bfd_pef_scan_start_address (bfd *abfd)
 471 {
 472   bfd_pef_loader_header header;
 473   asection *section;
 474
 475   asection *loadersec = NULL;
 476   unsigned char *loaderbuf = NULL;
 477   size_t loaderlen = 0;
 478   int ret;
 479
 480   loadersec = bfd_get_section_by_name (abfd, "loader");
 481   if (loadersec == NULL)
 482     goto end;
 483
 484   loaderlen = loadersec->size;
 485   if (loaderlen < 56)
 486     goto error;
 487   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) != 0)
 488     goto error;
 489   loaderbuf = _bfd_malloc_and_read (abfd, loaderlen, loaderlen);
 490   if (loaderbuf == NULL)
 491     goto error;
 492
 493   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 494   if (ret < 0)
 495     goto error;
 496
 497   if (header.main_section < 0)
 498     goto end;
 499
 500   for (section = abfd->sections; section != NULL; section = section->next)
 501     if ((long) (section->index + 1) == header.main_section)
 502       break;
 503
 504   if (section == NULL)
 505     goto error;
 506
 507   abfd->start_address = section->vma + header.main_offset;
 508
 509  end:
 510   free (loaderbuf);
 511   return 0;
 512
 513  error:
 514   free (loaderbuf);
 515   return -1;
 516 }
 517
 518 int
 519 bfd_pef_scan (bfd *abfd,
 520               bfd_pef_header *header,
 521               bfd_pef_data_struct *mdata)
 522 {
 523   unsigned int i;
 524   enum bfd_architecture cputype;
 525   unsigned long cpusubtype;
 526
 527   mdata->header = *header;
 528
 529   bfd_pef_convert_architecture (header->architecture, &cputype, &cpusubtype);
 530   if (cputype == bfd_arch_unknown)
 531     {
 532       _bfd_error_handler (_("bfd_pef_scan: unknown architecture 0x%lx"),
 533                           header->architecture);
 534       return -1;
 535     }
 536   bfd_set_arch_mach (abfd, cputype, cpusubtype);
 537
 538   mdata->header = *header;
 539
 540   abfd->flags = (abfd->xvec->object_flags
 541                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
 542
 543   if (header->section_count != 0)
 544     {
 545       mdata->sections = bfd_alloc (abfd, header->section_count * sizeof (bfd_pef_section));
 546
 547       if (mdata->sections == NULL)
 548         return -1;
 549
 550       for (i = 0; i < header->section_count; i++)
 551         {
 552           bfd_pef_section *cur = &mdata->sections[i];
 553           cur->header_offset = 40 + (i * 28);
 554           if (bfd_pef_scan_section (abfd, cur) < 0)
 555             return -1;
 556         }
 557     }
 558
 559   if (bfd_pef_scan_start_address (abfd) < 0)
 560     return -1;
 561
 562   abfd->tdata.pef_data = mdata;
 563
 564   return 0;
 565 }
 566
 567 static int
 568 bfd_pef_read_header (bfd *abfd, bfd_pef_header *header)
 569 {
 570   unsigned char buf[40];
 571
 572   if (bfd_seek (abfd, 0, SEEK_SET) != 0
 573       || bfd_read (buf, 40, abfd) != 40)
 574     return -1;
 575
 576   header->tag1 = bfd_getb32 (buf);
 577   header->tag2 = bfd_getb32 (buf + 4);
 578   header->architecture = bfd_getb32 (buf + 8);
 579   header->format_version = bfd_getb32 (buf + 12);
 580   header->timestamp = bfd_getb32 (buf + 16);
 581   header->old_definition_version = bfd_getb32 (buf + 20);
 582   header->old_implementation_version = bfd_getb32 (buf + 24);
 583   header->current_version = bfd_getb32 (buf + 28);
 584   header->section_count = bfd_getb32 (buf + 32) + 1;
 585   header->instantiated_section_count = bfd_getb32 (buf + 34);
 586   header->reserved = bfd_getb32 (buf + 36);
 587
 588   return 0;
 589 }
 590
 591 static bfd_cleanup
 592 bfd_pef_object_p (bfd *abfd)
 593 {
 594   bfd_pef_header header;
 595   bfd_pef_data_struct *mdata;
 596
 597   if (bfd_pef_read_header (abfd, &header) != 0)
 598     goto wrong;
 599
 600   if (header.tag1 != BFD_PEF_TAG1 || header.tag2 != BFD_PEF_TAG2)
 601     goto wrong;
 602
 603   mdata = (bfd_pef_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
 604   if (mdata == NULL)
 605     goto fail;
 606
 607   if (bfd_pef_scan (abfd, &header, mdata))
 608     goto wrong;
 609
 610   return _bfd_no_cleanup;
 611
 612  wrong:
 613   bfd_set_error (bfd_error_wrong_format);
 614
 615  fail:
 616   return NULL;
 617 }
 618
 619 static int
 620 bfd_pef_parse_traceback_tables (bfd *abfd,
 621                                 asection *sec,
 622                                 unsigned char *buf,
 623                                 size_t len,
 624                                 long *nsym,
 625                                 asymbol **csym)
 626 {
 627   char *name;
 628
 629   asymbol function;
 630   asymbol traceback;
 631
 632   const char *const tbprefix = "__traceback_";
 633   size_t tbnamelen;
 634
 635   size_t pos = 0;
 636   unsigned long count = 0;
 637   int ret;
 638
 639   for (;;)
 640     {
 641       /* We're reading symbols two at a time.  */
 642       if (csym && ((csym[count] == NULL) || (csym[count + 1] == NULL)))
 643         break;
 644
 645       pos += 3;
 646       pos -= (pos % 4);
 647
 648       while ((pos + 4) <= len)
 649         {
 650           if (bfd_getb32 (buf + pos) == 0)
 651             break;
 652           pos += 4;
 653         }
 654
 655       if ((pos + 4) > len)
 656         break;
 657
 658       ret = bfd_pef_parse_traceback_table (abfd, sec, buf, len, pos + 4,
 659                                            &function, 0);
 660       if (ret < 0)
 661         {
 662           /* Skip over 0x0L to advance to next possible traceback table.  */
 663           pos += 4;
 664           continue;
 665         }
 666
 667       BFD_ASSERT (function.name != NULL);
 668
 669       /* Don't bother to compute the name if we are just
 670          counting symbols.  */
 671       if (csym)
 672         {
 673           tbnamelen = strlen (tbprefix) + strlen (function.name);
 674           name = bfd_alloc (abfd, tbnamelen + 1);
 675           if (name == NULL)
 676             {
 677               bfd_release (abfd, (void *) function.name);
 678               function.name = NULL;
 679               break;
 680             }
 681           snprintf (name, tbnamelen + 1, "%s%s", tbprefix, function.name);
 682           traceback.name = name;
 683           traceback.value = pos;
 684           traceback.the_bfd = abfd;
 685           traceback.section = sec;
 686           traceback.flags = 0;
 687           traceback.udata.i = ret;
 688
 689           *(csym[count]) = function;
 690           *(csym[count + 1]) = traceback;
 691         }
 692
 693       pos += ret;
 694       count += 2;
 695     }
 696
 697   *nsym = count;
 698   return 0;
 699 }
 700
 701 static int
 702 bfd_pef_parse_function_stub (bfd *abfd ATTRIBUTE_UNUSED,
 703                              unsigned char *buf,
 704                              size_t len,
 705                              unsigned long *offset)
 706 {
 707   BFD_ASSERT (len == 24);
 708
 709   if ((bfd_getb32 (buf) & 0xffff0000) != 0x81820000)
 710     return -1;
 711   if (bfd_getb32 (buf + 4) != 0x90410014)
 712     return -1;
 713   if (bfd_getb32 (buf + 8) != 0x800c0000)
 714     return -1;
 715   if (bfd_getb32 (buf + 12) != 0x804c0004)
 716     return -1;
 717   if (bfd_getb32 (buf + 16) != 0x7c0903a6)
 718     return -1;
 719   if (bfd_getb32 (buf + 20) != 0x4e800420)
 720     return -1;
 721
 722   if (offset != NULL)
 723     *offset = (bfd_getb32 (buf) & 0x0000ffff) / 4;
 724
 725   return 0;
 726 }
 727
 728 static int
 729 bfd_pef_parse_function_stubs (bfd *abfd,
 730                               asection *codesec,
 731                               unsigned char *codebuf,
 732                               size_t codelen,
 733                               unsigned char *loaderbuf,
 734                               size_t loaderlen,
 735                               unsigned long *nsym,
 736                               asymbol **csym)
 737 {
 738   const char *const sprefix = "__stub_";
 739   size_t codepos = 0;
 740   unsigned long count = 0;
 741   bfd_pef_loader_header header;
 742   bfd_pef_imported_library *libraries = NULL;
 743   bfd_pef_imported_symbol *imports = NULL;
 744   unsigned long i;
 745   int ret;
 746
 747   if (loaderlen < 56)
 748     goto error;
 749
 750   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 751   if (ret < 0)
 752     goto error;
 753
 754   if ((loaderlen - 56) / 24 < header.imported_library_count)
 755     goto error;
 756
 757   if ((loaderlen - 56 - header.imported_library_count * 24) / 4
 758       < header.total_imported_symbol_count)
 759     goto error;
 760
 761   libraries = bfd_malloc
 762     (header.imported_library_count * sizeof (bfd_pef_imported_library));
 763   imports = bfd_malloc
 764     (header.total_imported_symbol_count * sizeof (bfd_pef_imported_symbol));
 765   if (libraries == NULL || imports == NULL)
 766     goto error;
 767
 768   for (i = 0; i < header.imported_library_count; i++)
 769     {
 770       ret = bfd_pef_parse_imported_library
 771         (abfd, loaderbuf + 56 + (i * 24), 24, &libraries[i]);
 772       if (ret < 0)
 773         goto error;
 774     }
 775
 776   for (i = 0; i < header.total_imported_symbol_count; i++)
 777     {
 778       ret = (bfd_pef_parse_imported_symbol
 779              (abfd,
 780               loaderbuf + 56 + (header.imported_library_count * 24) + (i * 4),
 781               4, &imports[i]));
 782       if (ret < 0)
 783         goto error;
 784     }
 785
 786   codepos = 0;
 787
 788   for (;;)
 789     {
 790       asymbol sym;
 791       const char *symname;
 792       char *name;
 793       unsigned long sym_index;
 794
 795       if (csym && (csym[count] == NULL))
 796         break;
 797
 798       codepos += 3;
 799       codepos -= (codepos % 4);
 800
 801       while ((codepos + 4) <= codelen)
 802         {
 803           if ((bfd_getb32 (codebuf + codepos) & 0xffff0000) == 0x81820000)
 804             break;
 805           codepos += 4;
 806         }
 807
 808       if ((codepos + 24) > codelen)
 809         break;
 810
 811       ret = bfd_pef_parse_function_stub (abfd, codebuf + codepos, 24, &sym_index);
 812       if (ret < 0)
 813         {
 814           codepos += 24;
 815           continue;
 816         }
 817
 818       if (sym_index >= header.total_imported_symbol_count)
 819         {
 820           codepos += 24;
 821           continue;
 822         }
 823
 824       {
 825         size_t max, namelen;
 826         const char *s;
 827
 828         if (loaderlen < (header.loader_strings_offset + imports[sym_index].name))
 829           goto error;
 830
 831         max = loaderlen - (header.loader_strings_offset + imports[sym_index].name);
 832         symname = (char *) loaderbuf;
 833         symname += header.loader_strings_offset + imports[sym_index].name;
 834         namelen = 0;
 835         for (s = symname; s < (symname + max); s++)
 836           {
 837             if (*s == '\0')
 838               break;
 839             if (! ISPRINT (*s))
 840               goto error;
 841             namelen++;
 842           }
 843         if (*s != '\0')
 844           goto error;
 845
 846         name = bfd_alloc (abfd, strlen (sprefix) + namelen + 1);
 847         if (name == NULL)
 848           break;
 849
 850         snprintf (name, strlen (sprefix) + namelen + 1, "%s%s",
 851                   sprefix, symname);
 852         sym.name = name;
 853       }
 854
 855       sym.value = codepos;
 856       sym.the_bfd = abfd;
 857       sym.section = codesec;
 858       sym.flags = 0;
 859       sym.udata.i = 0;
 860
 861       codepos += 24;
 862
 863       if (csym != NULL)
 864         *(csym[count]) = sym;
 865
 866       count++;
 867     }
 868
 869   goto end;
 870
 871  end:
 872   free (libraries);
 873   free (imports);
 874   *nsym = count;
 875   return 0;
 876
 877  error:
 878   free (libraries);
 879   free (imports);
 880   *nsym = count;
 881   return -1;
 882 }
 883
 884 static long
 885 bfd_pef_parse_symbols (bfd *abfd, asymbol **csym)
 886 {
 887   unsigned long count = 0;
 888
 889   asection *codesec = NULL;
 890   unsigned char *codebuf = NULL;
 891   size_t codelen = 0;
 892
 893   asection *loadersec = NULL;
 894   unsigned char *loaderbuf = NULL;
 895   size_t loaderlen = 0;
 896
 897   codesec = bfd_get_section_by_name (abfd, "code");
 898   if (codesec != NULL)
 899     {
 900       codelen = codesec->size;
 901       if (bfd_seek (abfd, codesec->filepos, SEEK_SET) != 0)
 902         goto end;
 903       codebuf = _bfd_malloc_and_read (abfd, codelen, codelen);
 904       if (codebuf == NULL)
 905         goto end;
 906     }
 907
 908   loadersec = bfd_get_section_by_name (abfd, "loader");
 909   if (loadersec != NULL)
 910     {
 911       loaderlen = loadersec->size;
 912       if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) != 0)
 913         goto end;
 914       loaderbuf = _bfd_malloc_and_read (abfd, loaderlen, loaderlen);
 915       if (loaderbuf == NULL)
 916         goto end;
 917     }
 918
 919   count = 0;
 920   if (codesec != NULL)
 921     {
 922       long ncount = 0;
 923       bfd_pef_parse_traceback_tables (abfd, codesec, codebuf, codelen,
 924                                       &ncount, csym);
 925       count += ncount;
 926     }
 927
 928   if ((codesec != NULL) && (loadersec != NULL))
 929     {
 930       unsigned long ncount = 0;
 931       bfd_pef_parse_function_stubs
 932         (abfd, codesec, codebuf, codelen, loaderbuf, loaderlen, &ncount,
 933          (csym != NULL) ? (csym + count) : NULL);
 934       count += ncount;
 935     }
 936
 937   if (csym != NULL)
 938     csym[count] = NULL;
 939
 940  end:
 941   free (codebuf);
 942   free (loaderbuf);
 943   return count;
 944 }
 945
 946 static long
 947 bfd_pef_count_symbols (bfd *abfd)
 948 {
 949   return bfd_pef_parse_symbols (abfd, NULL);
 950 }
 951
 952 static long
 953 bfd_pef_get_symtab_upper_bound (bfd *abfd)
 954 {
 955   long nsyms = bfd_pef_count_symbols (abfd);
 956
 957   if (nsyms < 0)
 958     return nsyms;
 959   return ((nsyms + 1) * sizeof (asymbol *));
 960 }
 961
 962 static long
 963 bfd_pef_canonicalize_symtab (bfd *abfd, asymbol **alocation)
 964 {
 965   long i;
 966   asymbol *syms;
 967   long ret;
 968   long nsyms = bfd_pef_count_symbols (abfd);
 969
 970   if (nsyms < 0)
 971     return nsyms;
 972
 973   syms = bfd_alloc (abfd, nsyms * sizeof (asymbol));
 974   if (syms == NULL)
 975     return -1;
 976
 977   for (i = 0; i < nsyms; i++)
 978     alocation[i] = &syms[i];
 979
 980   alocation[nsyms] = NULL;
 981
 982   ret = bfd_pef_parse_symbols (abfd, alocation);
 983   if (ret != nsyms)
 984     return 0;
 985
 986   return ret;
 987 }
 988
 989 #define bfd_pef_make_empty_symbol _bfd_generic_make_empty_symbol
 990
 991 static void
 992 bfd_pef_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
 993                          asymbol *symbol,
 994                          symbol_info *ret)
 995 {
 996   bfd_symbol_info (symbol, ret);
 997 }
 998
 999 static int
1000 bfd_pef_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
1001                         struct bfd_link_info *info ATTRIBUTE_UNUSED)
1002 {
1003   return 0;
1004 }
1005
1006 const bfd_target pef_vec =
1007 {
1008   "pef",                        /* Name.  */
1009   bfd_target_pef_flavour,       /* Flavour.  */
1010   BFD_ENDIAN_BIG,               /* Byteorder.  */
1011   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1012   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1013    HAS_LINENO | HAS_DEBUG |
1014    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1015   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1016    | SEC_ROM | SEC_HAS_CONTENTS), /* Section_flags.  */
1017   0,                            /* Symbol_leading_char.  */
1018   ' ',                          /* AR_pad_char.  */
1019   16,                           /* AR_max_namelen.  */
1020   0,                            /* match priority.  */
1021   TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
1022   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1023   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1024   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1025   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1026   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1027   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1028   {                             /* bfd_check_format.  */
1029     _bfd_dummy_target,
1030     bfd_pef_object_p,           /* bfd_check_format.  */
1031     _bfd_dummy_target,
1032     _bfd_dummy_target,
1033   },
1034   {                             /* bfd_set_format.  */
1035     _bfd_bool_bfd_false_error,
1036     bfd_pef_mkobject,
1037     _bfd_bool_bfd_false_error,
1038     _bfd_bool_bfd_false_error,
1039   },
1040   {                             /* bfd_write_contents.  */
1041     _bfd_bool_bfd_false_error,
1042     _bfd_bool_bfd_true,
1043     _bfd_bool_bfd_false_error,
1044     _bfd_bool_bfd_false_error,
1045   },
1046
1047   BFD_JUMP_TABLE_GENERIC (bfd_pef),
1048   BFD_JUMP_TABLE_COPY (_bfd_generic),
1049   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1050   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1051   BFD_JUMP_TABLE_SYMBOLS (bfd_pef),
1052   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1053   BFD_JUMP_TABLE_WRITE (bfd_pef),
1054   BFD_JUMP_TABLE_LINK (bfd_pef),
1055   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1056
1057   NULL,
1058
1059   NULL
1060 };
1061
1062 #define bfd_pef_xlib_close_and_cleanup              _bfd_generic_close_and_cleanup
1063 #define bfd_pef_xlib_bfd_free_cached_info           _bfd_generic_bfd_free_cached_info
1064 #define bfd_pef_xlib_new_section_hook               _bfd_generic_new_section_hook
1065 #define bfd_pef_xlib_get_section_contents           _bfd_generic_get_section_contents
1066 #define bfd_pef_xlib_set_section_contents           _bfd_generic_set_section_contents
1067 #define bfd_pef_xlib_set_section_contents_in_window _bfd_generic_set_section_contents_in_window
1068
1069 static int
1070 bfd_pef_xlib_read_header (bfd *abfd, bfd_pef_xlib_header *header)
1071 {
1072   unsigned char buf[80];
1073
1074   if (bfd_seek (abfd, 0, SEEK_SET) != 0
1075       || bfd_read (buf, sizeof buf, abfd) != sizeof buf)
1076     return -1;
1077
1078   header->tag1 = bfd_getb32 (buf);
1079   header->tag2 = bfd_getb32 (buf + 4);
1080   header->current_format = bfd_getb32 (buf + 8);
1081   header->container_strings_offset = bfd_getb32 (buf + 12);
1082   header->export_hash_offset = bfd_getb32 (buf + 16);
1083   header->export_key_offset = bfd_getb32 (buf + 20);
1084   header->export_symbol_offset = bfd_getb32 (buf + 24);
1085   header->export_names_offset = bfd_getb32 (buf + 28);
1086   header->export_hash_table_power = bfd_getb32 (buf + 32);
1087   header->exported_symbol_count = bfd_getb32 (buf + 36);
1088   header->frag_name_offset = bfd_getb32 (buf + 40);
1089   header->frag_name_length = bfd_getb32 (buf + 44);
1090   header->dylib_path_offset = bfd_getb32 (buf + 48);
1091   header->dylib_path_length = bfd_getb32 (buf + 52);
1092   header->cpu_family = bfd_getb32 (buf + 56);
1093   header->cpu_model = bfd_getb32 (buf + 60);
1094   header->date_time_stamp = bfd_getb32 (buf + 64);
1095   header->current_version = bfd_getb32 (buf + 68);
1096   header->old_definition_version = bfd_getb32 (buf + 72);
1097   header->old_implementation_version = bfd_getb32 (buf + 76);
1098
1099   return 0;
1100 }
1101
1102 static int
1103 bfd_pef_xlib_scan (bfd *abfd, bfd_pef_xlib_header *header)
1104 {
1105   bfd_pef_xlib_data_struct *mdata = NULL;
1106
1107   mdata = bfd_alloc (abfd, sizeof (* mdata));
1108   if (mdata == NULL)
1109     return -1;
1110
1111   mdata->header = *header;
1112
1113   abfd->flags = (abfd->xvec->object_flags
1114                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
1115
1116   abfd->tdata.pef_xlib_data = mdata;
1117
1118   return 0;
1119 }
1120
1121 static bfd_cleanup
1122 bfd_pef_xlib_object_p (bfd *abfd)
1123 {
1124   bfd_pef_xlib_header header;
1125
1126   if (bfd_pef_xlib_read_header (abfd, &header) != 0)
1127     {
1128       bfd_set_error (bfd_error_wrong_format);
1129       return NULL;
1130     }
1131
1132   if ((header.tag1 != BFD_PEF_XLIB_TAG1)
1133       || ((header.tag2 != BFD_PEF_VLIB_TAG2)
1134           && (header.tag2 != BFD_PEF_BLIB_TAG2)))
1135     {
1136       bfd_set_error (bfd_error_wrong_format);
1137       return NULL;
1138     }
1139
1140   if (bfd_pef_xlib_scan (abfd, &header) != 0)
1141     {
1142       bfd_set_error (bfd_error_wrong_format);
1143       return NULL;
1144     }
1145
1146   return _bfd_no_cleanup;
1147 }
1148
1149 const bfd_target pef_xlib_vec =
1150 {
1151   "pef-xlib",                   /* Name.  */
1152   bfd_target_pef_xlib_flavour,  /* Flavour.  */
1153   BFD_ENDIAN_BIG,               /* Byteorder */
1154   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1155   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1156    HAS_LINENO | HAS_DEBUG |
1157    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1158   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1159    | SEC_ROM | SEC_HAS_CONTENTS),/* Section_flags.  */
1160   0,                            /* Symbol_leading_char.  */
1161   ' ',                          /* AR_pad_char.  */
1162   16,                           /* AR_max_namelen.  */
1163   0,                            /* match priority.  */
1164   TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
1165   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1166   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1167   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1168   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1169   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1170   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1171   {                             /* bfd_check_format.  */
1172     _bfd_dummy_target,
1173     bfd_pef_xlib_object_p,      /* bfd_check_format.  */
1174     _bfd_dummy_target,
1175     _bfd_dummy_target,
1176   },
1177   {                             /* bfd_set_format.  */
1178     _bfd_bool_bfd_false_error,
1179     bfd_pef_mkobject,
1180     _bfd_bool_bfd_false_error,
1181     _bfd_bool_bfd_false_error,
1182   },
1183   {                             /* bfd_write_contents.  */
1184     _bfd_bool_bfd_false_error,
1185     _bfd_bool_bfd_true,
1186     _bfd_bool_bfd_false_error,
1187     _bfd_bool_bfd_false_error,
1188   },
1189
1190   BFD_JUMP_TABLE_GENERIC (bfd_pef_xlib),
1191   BFD_JUMP_TABLE_COPY (_bfd_generic),
1192   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1193   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1194   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
1195   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1196   BFD_JUMP_TABLE_WRITE (_bfd_nowrite),
1197   BFD_JUMP_TABLE_LINK (_bfd_nolink),
1198   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1199
1200   NULL,
1201
1202   NULL
1203 };