bfd/pef.c

   1 /* PEF support for BFD.
   2    Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   3    Free Software Foundation, Inc.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #include "sysdep.h"
  23 #include "safe-ctype.h"
  24 #include "pef.h"
  25 #include "pef-traceback.h"
  26 #include "bfd.h"
  27 #include "libbfd.h"
  28 #include "libiberty.h"
  29
  30 #ifndef BFD_IO_FUNCS
  31 #define BFD_IO_FUNCS 0
  32 #endif
  33
  34 #define bfd_pef_close_and_cleanup                   _bfd_generic_close_and_cleanup
  35 #define bfd_pef_bfd_free_cached_info                _bfd_generic_bfd_free_cached_info
  36 #define bfd_pef_new_section_hook                    _bfd_generic_new_section_hook
  37 #define bfd_pef_bfd_is_local_label_name             bfd_generic_is_local_label_name
  38 #define bfd_pef_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
  39 #define bfd_pef_get_lineno                          _bfd_nosymbols_get_lineno
  40 #define bfd_pef_find_nearest_line                   _bfd_nosymbols_find_nearest_line
  41 #define bfd_pef_find_inliner_info                   _bfd_nosymbols_find_inliner_info
  42 #define bfd_pef_bfd_make_debug_symbol               _bfd_nosymbols_bfd_make_debug_symbol
  43 #define bfd_pef_read_minisymbols                    _bfd_generic_read_minisymbols
  44 #define bfd_pef_minisymbol_to_symbol                _bfd_generic_minisymbol_to_symbol
  45 #define bfd_pef_set_arch_mach                       _bfd_generic_set_arch_mach
  46 #define bfd_pef_get_section_contents                _bfd_generic_get_section_contents
  47 #define bfd_pef_set_section_contents                _bfd_generic_set_section_contents
  48 #define bfd_pef_bfd_get_relocated_section_contents  bfd_generic_get_relocated_section_contents
  49 #define bfd_pef_bfd_relax_section                   bfd_generic_relax_section
  50 #define bfd_pef_bfd_gc_sections                     bfd_generic_gc_sections
  51 #define bfd_pef_bfd_merge_sections                  bfd_generic_merge_sections
  52 #define bfd_pef_bfd_is_group_section                bfd_generic_is_group_section
  53 #define bfd_pef_bfd_discard_group                   bfd_generic_discard_group
  54 #define bfd_pef_section_already_linked              _bfd_generic_section_already_linked
  55 #define bfd_pef_bfd_link_hash_table_create          _bfd_generic_link_hash_table_create
  56 #define bfd_pef_bfd_link_hash_table_free            _bfd_generic_link_hash_table_free
  57 #define bfd_pef_bfd_link_add_symbols                _bfd_generic_link_add_symbols
  58 #define bfd_pef_bfd_link_just_syms                  _bfd_generic_link_just_syms
  59 #define bfd_pef_bfd_final_link                      _bfd_generic_final_link
  60 #define bfd_pef_bfd_link_split_section              _bfd_generic_link_split_section
  61 #define bfd_pef_get_section_contents_in_window      _bfd_generic_get_section_contents_in_window
  62
  63 static int
  64 bfd_pef_parse_traceback_table (bfd *abfd,
  65                                asection *section,
  66                                unsigned char *buf,
  67                                size_t len,
  68                                size_t pos,
  69                                asymbol *sym,
  70                                FILE *file)
  71 {
  72   struct traceback_table table;
  73   size_t offset;
  74   const char *s;
  75   asymbol tmpsymbol;
  76
  77   if (sym == NULL)
  78     sym = & tmpsymbol;
  79
  80   sym->name = NULL;
  81   sym->value = 0;
  82   sym->the_bfd = abfd;
  83   sym->section = section;
  84   sym->flags = 0;
  85   sym->udata.i = 0;
  86
  87   /* memcpy is fine since all fields are unsigned char.  */
  88   if ((pos + 8) > len)
  89     return -1;
  90   memcpy (&table, buf + pos, 8);
  91
  92   /* Calling code relies on returned symbols having a name and
  93      correct offset.  */
  94   if ((table.lang != TB_C) && (table.lang != TB_CPLUSPLUS))
  95     return -1;
  96
  97   if (! (table.flags2 & TB_NAME_PRESENT))
  98     return -1;
  99
 100   if (! table.flags1 & TB_HAS_TBOFF)
 101     return -1;
 102
 103   offset = 8;
 104
 105   if ((table.flags5 & TB_FLOATPARAMS) || (table.fixedparams))
 106     offset += 4;
 107
 108   if (table.flags1 & TB_HAS_TBOFF)
 109     {
 110       struct traceback_table_tboff off;
 111
 112       if ((pos + offset + 4) > len)
 113         return -1;
 114       off.tb_offset = bfd_getb32 (buf + pos + offset);
 115       offset += 4;
 116
 117       /* Need to subtract 4 because the offset includes the 0x0L
 118          preceding the table.  */
 119       if (file != NULL)
 120         fprintf (file, " [offset = 0x%lx]", off.tb_offset);
 121
 122       if ((file == NULL) && ((off.tb_offset + 4) > (pos + offset)))
 123         return -1;
 124
 125       sym->value = pos - off.tb_offset - 4;
 126     }
 127
 128   if (table.flags2 & TB_INT_HNDL)
 129     offset += 4;
 130
 131   if (table.flags1 & TB_HAS_CTL)
 132     {
 133       struct traceback_table_anchors anchors;
 134
 135       if ((pos + offset + 4) > len)
 136         return -1;
 137       anchors.ctl_info = bfd_getb32 (buf + pos + offset);
 138       offset += 4;
 139
 140       if (anchors.ctl_info > 1024)
 141         return -1;
 142
 143       offset += anchors.ctl_info * 4;
 144     }
 145
 146   if (table.flags2 & TB_NAME_PRESENT)
 147     {
 148       struct traceback_table_routine name;
 149       char *namebuf;
 150
 151       if ((pos + offset + 2) > len)
 152         return -1;
 153       name.name_len = bfd_getb16 (buf + pos + offset);
 154       offset += 2;
 155
 156       if (name.name_len > 4096)
 157         return -1;
 158
 159       if ((pos + offset + name.name_len) > len)
 160         return -1;
 161
 162       namebuf = bfd_alloc (abfd, name.name_len + 1);
 163       if (namebuf == NULL)
 164         return -1;
 165
 166       memcpy (namebuf, buf + pos + offset, name.name_len);
 167       namebuf[name.name_len] = '\0';
 168
 169       /* Strip leading period inserted by compiler.  */
 170       if (namebuf[0] == '.')
 171         memmove (namebuf, namebuf + 1, name.name_len + 1);
 172
 173       sym->name = namebuf;
 174
 175       for (s = sym->name; (*s != '\0'); s++)
 176         if (! ISPRINT (*s))
 177           return -1;
 178
 179       offset += name.name_len;
 180     }
 181
 182   if (table.flags2 & TB_USES_ALLOCA)
 183     offset += 4;
 184
 185   if (table.flags4 & TB_HAS_VEC_INFO)
 186     offset += 4;
 187
 188   if (file != NULL)
 189     fprintf (file, " [length = 0x%lx]", (long) offset);
 190
 191   return offset;
 192 }
 193
 194 static void
 195 bfd_pef_print_symbol (bfd *abfd,
 196                       void * afile,
 197                       asymbol *symbol,
 198                       bfd_print_symbol_type how)
 199 {
 200   FILE *file = (FILE *) afile;
 201
 202   switch (how)
 203     {
 204     case bfd_print_symbol_name:
 205       fprintf (file, "%s", symbol->name);
 206       break;
 207     default:
 208       bfd_print_symbol_vandf (abfd, (void *) file, symbol);
 209       fprintf (file, " %-5s %s", symbol->section->name, symbol->name);
 210       if (CONST_STRNEQ (symbol->name, "__traceback_"))
 211         {
 212           unsigned char *buf = alloca (symbol->udata.i);
 213           size_t offset = symbol->value + 4;
 214           size_t len = symbol->udata.i;
 215           int ret;
 216
 217           bfd_get_section_contents (abfd, symbol->section, buf, offset, len);
 218           ret = bfd_pef_parse_traceback_table (abfd, symbol->section, buf,
 219                                                len, 0, NULL, file);
 220           if (ret < 0)
 221             fprintf (file, " [ERROR]");
 222         }
 223     }
 224 }
 225
 226 static void
 227 bfd_pef_convert_architecture (unsigned long architecture,
 228                               enum bfd_architecture *type,
 229                               unsigned long *subtype)
 230 {
 231   const unsigned long ARCH_POWERPC = 0x70777063; /* 'pwpc'.  */
 232   const unsigned long ARCH_M68K = 0x6d36386b; /* 'm68k'.  */
 233
 234   *subtype = bfd_arch_unknown;
 235   *type = bfd_arch_unknown;
 236
 237   if (architecture == ARCH_POWERPC)
 238     *type = bfd_arch_powerpc;
 239   else if (architecture == ARCH_M68K)
 240     *type = bfd_arch_m68k;
 241 }
 242
 243 static bfd_boolean
 244 bfd_pef_mkobject (bfd *abfd ATTRIBUTE_UNUSED)
 245 {
 246   return TRUE;
 247 }
 248
 249 static const char *bfd_pef_section_name (bfd_pef_section *section)
 250 {
 251   switch (section->section_kind)
 252     {
 253     case BFD_PEF_SECTION_CODE: return "code";
 254     case BFD_PEF_SECTION_UNPACKED_DATA: return "unpacked-data";
 255     case BFD_PEF_SECTION_PACKED_DATA: return "packed-data";
 256     case BFD_PEF_SECTION_CONSTANT: return "constant";
 257     case BFD_PEF_SECTION_LOADER: return "loader";
 258     case BFD_PEF_SECTION_DEBUG: return "debug";
 259     case BFD_PEF_SECTION_EXEC_DATA: return "exec-data";
 260     case BFD_PEF_SECTION_EXCEPTION: return "exception";
 261     case BFD_PEF_SECTION_TRACEBACK: return "traceback";
 262     default: return "unknown";
 263     }
 264 }
 265
 266 static unsigned long bfd_pef_section_flags (bfd_pef_section *section)
 267 {
 268   switch (section->section_kind)
 269     {
 270     case BFD_PEF_SECTION_CODE:
 271       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
 272     case BFD_PEF_SECTION_UNPACKED_DATA:
 273     case BFD_PEF_SECTION_PACKED_DATA:
 274     case BFD_PEF_SECTION_CONSTANT:
 275     case BFD_PEF_SECTION_LOADER:
 276     case BFD_PEF_SECTION_DEBUG:
 277     case BFD_PEF_SECTION_EXEC_DATA:
 278     case BFD_PEF_SECTION_EXCEPTION:
 279     case BFD_PEF_SECTION_TRACEBACK:
 280     default:
 281       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
 282     }
 283 }
 284
 285 static asection *
 286 bfd_pef_make_bfd_section (bfd *abfd, bfd_pef_section *section)
 287 {
 288   asection *bfdsec;
 289   const char *name = bfd_pef_section_name (section);
 290
 291   bfdsec = bfd_make_section_anyway (abfd, name);
 292   if (bfdsec == NULL)
 293     return NULL;
 294
 295   bfdsec->vma = section->default_address + section->container_offset;
 296   bfdsec->lma = section->default_address + section->container_offset;
 297   bfdsec->size = section->container_length;
 298   bfdsec->filepos = section->container_offset;
 299   bfdsec->alignment_power = section->alignment;
 300
 301   bfdsec->flags = bfd_pef_section_flags (section);
 302
 303   return bfdsec;
 304 }
 305
 306 int
 307 bfd_pef_parse_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 308                              unsigned char *buf,
 309                              size_t len,
 310                              bfd_pef_loader_header *header)
 311 {
 312   BFD_ASSERT (len == 56);
 313
 314   header->main_section = bfd_getb32 (buf);
 315   header->main_offset = bfd_getb32 (buf + 4);
 316   header->init_section = bfd_getb32 (buf + 8);
 317   header->init_offset = bfd_getb32 (buf + 12);
 318   header->term_section = bfd_getb32 (buf + 16);
 319   header->term_offset = bfd_getb32 (buf + 20);
 320   header->imported_library_count = bfd_getb32 (buf + 24);
 321   header->total_imported_symbol_count = bfd_getb32 (buf + 28);
 322   header->reloc_section_count = bfd_getb32 (buf + 32);
 323   header->reloc_instr_offset = bfd_getb32 (buf + 36);
 324   header->loader_strings_offset = bfd_getb32 (buf + 40);
 325   header->export_hash_offset = bfd_getb32 (buf + 44);
 326   header->export_hash_table_power = bfd_getb32 (buf + 48);
 327   header->exported_symbol_count = bfd_getb32 (buf + 52);
 328
 329   return 0;
 330 }
 331
 332 int
 333 bfd_pef_parse_imported_library (bfd *abfd ATTRIBUTE_UNUSED,
 334                                 unsigned char *buf,
 335                                 size_t len,
 336                                 bfd_pef_imported_library *header)
 337 {
 338   BFD_ASSERT (len == 24);
 339
 340   header->name_offset = bfd_getb32 (buf);
 341   header->old_implementation_version = bfd_getb32 (buf + 4);
 342   header->current_version = bfd_getb32 (buf + 8);
 343   header->imported_symbol_count = bfd_getb32 (buf + 12);
 344   header->first_imported_symbol = bfd_getb32 (buf + 16);
 345   header->options = buf[20];
 346   header->reserved_a = buf[21];
 347   header->reserved_b = bfd_getb16 (buf + 22);
 348
 349   return 0;
 350 }
 351
 352 int
 353 bfd_pef_parse_imported_symbol (bfd *abfd ATTRIBUTE_UNUSED,
 354                                unsigned char *buf,
 355                                size_t len,
 356                                bfd_pef_imported_symbol *symbol)
 357 {
 358   unsigned long value;
 359
 360   BFD_ASSERT (len == 4);
 361
 362   value = bfd_getb32 (buf);
 363   symbol->class = value >> 24;
 364   symbol->name = value & 0x00ffffff;
 365
 366   return 0;
 367 }
 368
 369 int
 370 bfd_pef_scan_section (bfd *abfd, bfd_pef_section *section)
 371 {
 372   unsigned char buf[28];
 373
 374   bfd_seek (abfd, section->header_offset, SEEK_SET);
 375   if (bfd_bread ((void *) buf, 28, abfd) != 28)
 376     return -1;
 377
 378   section->name_offset = bfd_h_get_32 (abfd, buf);
 379   section->default_address = bfd_h_get_32 (abfd, buf + 4);
 380   section->total_length = bfd_h_get_32 (abfd, buf + 8);
 381   section->unpacked_length = bfd_h_get_32 (abfd, buf + 12);
 382   section->container_length = bfd_h_get_32 (abfd, buf + 16);
 383   section->container_offset = bfd_h_get_32 (abfd, buf + 20);
 384   section->section_kind = buf[24];
 385   section->share_kind = buf[25];
 386   section->alignment = buf[26];
 387   section->reserved = buf[27];
 388
 389   section->bfd_section = bfd_pef_make_bfd_section (abfd, section);
 390   if (section->bfd_section == NULL)
 391     return -1;
 392
 393   return 0;
 394 }
 395
 396 void
 397 bfd_pef_print_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 398                              bfd_pef_loader_header *header,
 399                              FILE *file)
 400 {
 401   fprintf (file, "main_section: %ld\n", header->main_section);
 402   fprintf (file, "main_offset: %lu\n", header->main_offset);
 403   fprintf (file, "init_section: %ld\n", header->init_section);
 404   fprintf (file, "init_offset: %lu\n", header->init_offset);
 405   fprintf (file, "term_section: %ld\n", header->term_section);
 406   fprintf (file, "term_offset: %lu\n", header->term_offset);
 407   fprintf (file, "imported_library_count: %lu\n",
 408            header->imported_library_count);
 409   fprintf (file, "total_imported_symbol_count: %lu\n",
 410            header->total_imported_symbol_count);
 411   fprintf (file, "reloc_section_count: %lu\n", header->reloc_section_count);
 412   fprintf (file, "reloc_instr_offset: %lu\n", header->reloc_instr_offset);
 413   fprintf (file, "loader_strings_offset: %lu\n",
 414            header->loader_strings_offset);
 415   fprintf (file, "export_hash_offset: %lu\n", header->export_hash_offset);
 416   fprintf (file, "export_hash_table_power: %lu\n",
 417            header->export_hash_table_power);
 418   fprintf (file, "exported_symbol_count: %lu\n",
 419            header->exported_symbol_count);
 420 }
 421
 422 int
 423 bfd_pef_print_loader_section (bfd *abfd, FILE *file)
 424 {
 425   bfd_pef_loader_header header;
 426   asection *loadersec = NULL;
 427   unsigned char *loaderbuf = NULL;
 428   size_t loaderlen = 0;
 429
 430   loadersec = bfd_get_section_by_name (abfd, "loader");
 431   if (loadersec == NULL)
 432     return -1;
 433
 434   loaderlen = loadersec->size;
 435   loaderbuf = bfd_malloc (loaderlen);
 436
 437   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0
 438       || bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen
 439       || loaderlen < 56
 440       || bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header) < 0)
 441     {
 442       free (loaderbuf);
 443       return -1;
 444     }
 445
 446   bfd_pef_print_loader_header (abfd, &header, file);
 447   return 0;
 448 }
 449
 450 int
 451 bfd_pef_scan_start_address (bfd *abfd)
 452 {
 453   bfd_pef_loader_header header;
 454   asection *section;
 455
 456   asection *loadersec = NULL;
 457   unsigned char *loaderbuf = NULL;
 458   size_t loaderlen = 0;
 459   int ret;
 460
 461   loadersec = bfd_get_section_by_name (abfd, "loader");
 462   if (loadersec == NULL)
 463     goto end;
 464
 465   loaderlen = loadersec->size;
 466   loaderbuf = bfd_malloc (loaderlen);
 467   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
 468     goto error;
 469   if (bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen)
 470     goto error;
 471
 472   if (loaderlen < 56)
 473     goto error;
 474   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 475   if (ret < 0)
 476     goto error;
 477
 478   if (header.main_section < 0)
 479     goto end;
 480
 481   for (section = abfd->sections; section != NULL; section = section->next)
 482     if ((section->index + 1) == header.main_section)
 483       break;
 484
 485   if (section == NULL)
 486     goto error;
 487
 488   abfd->start_address = section->vma + header.main_offset;
 489
 490  end:
 491   if (loaderbuf != NULL)
 492     free (loaderbuf);
 493   return 0;
 494
 495  error:
 496   if (loaderbuf != NULL)
 497     free (loaderbuf);
 498   return -1;
 499 }
 500
 501 int
 502 bfd_pef_scan (abfd, header, mdata)
 503      bfd *abfd;
 504      bfd_pef_header *header;
 505      bfd_pef_data_struct *mdata;
 506 {
 507   unsigned int i;
 508   enum bfd_architecture cputype;
 509   unsigned long cpusubtype;
 510
 511   mdata->header = *header;
 512
 513   bfd_pef_convert_architecture (header->architecture, &cputype, &cpusubtype);
 514   if (cputype == bfd_arch_unknown)
 515     {
 516       fprintf (stderr, "bfd_pef_scan: unknown architecture 0x%lx\n",
 517                header->architecture);
 518       return -1;
 519     }
 520   bfd_set_arch_mach (abfd, cputype, cpusubtype);
 521
 522   mdata->header = *header;
 523
 524   abfd->flags = (abfd->xvec->object_flags
 525                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
 526
 527   if (header->section_count != 0)
 528     {
 529       mdata->sections = bfd_alloc (abfd, header->section_count * sizeof (bfd_pef_section));
 530
 531       if (mdata->sections == NULL)
 532         return -1;
 533
 534       for (i = 0; i < header->section_count; i++)
 535         {
 536           bfd_pef_section *cur = &mdata->sections[i];
 537           cur->header_offset = 40 + (i * 28);
 538           if (bfd_pef_scan_section (abfd, cur) < 0)
 539             return -1;
 540         }
 541     }
 542
 543   if (bfd_pef_scan_start_address (abfd) < 0)
 544     return -1;
 545
 546   abfd->tdata.pef_data = mdata;
 547
 548   return 0;
 549 }
 550
 551 static int
 552 bfd_pef_read_header (bfd *abfd, bfd_pef_header *header)
 553 {
 554   unsigned char buf[40];
 555
 556   bfd_seek (abfd, 0, SEEK_SET);
 557
 558   if (bfd_bread ((void *) buf, 40, abfd) != 40)
 559     return -1;
 560
 561   header->tag1 = bfd_getb32 (buf);
 562   header->tag2 = bfd_getb32 (buf + 4);
 563   header->architecture = bfd_getb32 (buf + 8);
 564   header->format_version = bfd_getb32 (buf + 12);
 565   header->timestamp = bfd_getb32 (buf + 16);
 566   header->old_definition_version = bfd_getb32 (buf + 20);
 567   header->old_implementation_version = bfd_getb32 (buf + 24);
 568   header->current_version = bfd_getb32 (buf + 28);
 569   header->section_count = bfd_getb32 (buf + 32) + 1;
 570   header->instantiated_section_count = bfd_getb32 (buf + 34);
 571   header->reserved = bfd_getb32 (buf + 36);
 572
 573   return 0;
 574 }
 575
 576 static const bfd_target *
 577 bfd_pef_object_p (bfd *abfd)
 578 {
 579   struct bfd_preserve preserve;
 580   bfd_pef_header header;
 581
 582   preserve.marker = NULL;
 583   if (bfd_pef_read_header (abfd, &header) != 0)
 584     goto wrong;
 585
 586   if (header.tag1 != BFD_PEF_TAG1 || header.tag2 != BFD_PEF_TAG2)
 587     goto wrong;
 588
 589   preserve.marker = bfd_zalloc (abfd, sizeof (bfd_pef_data_struct));
 590   if (preserve.marker == NULL
 591       || !bfd_preserve_save (abfd, &preserve))
 592     goto fail;
 593
 594   if (bfd_pef_scan (abfd, &header,
 595                     (bfd_pef_data_struct *) preserve.marker) != 0)
 596     goto wrong;
 597
 598   bfd_preserve_finish (abfd, &preserve);
 599   return abfd->xvec;
 600
 601  wrong:
 602   bfd_set_error (bfd_error_wrong_format);
 603
 604  fail:
 605   if (preserve.marker != NULL)
 606     bfd_preserve_restore (abfd, &preserve);
 607   return NULL;
 608 }
 609
 610 static int
 611 bfd_pef_parse_traceback_tables (bfd *abfd,
 612                                 asection *sec,
 613                                 unsigned char *buf,
 614                                 size_t len,
 615                                 long *nsym,
 616                                 asymbol **csym)
 617 {
 618   char *name;
 619
 620   asymbol function;
 621   asymbol traceback;
 622
 623   const char *const tbprefix = "__traceback_";
 624   size_t tbnamelen;
 625
 626   size_t pos = 0;
 627   unsigned long count = 0;
 628   int ret;
 629
 630   for (;;)
 631     {
 632       /* We're reading symbols two at a time.  */
 633       if (csym && ((csym[count] == NULL) || (csym[count + 1] == NULL)))
 634         break;
 635
 636       pos += 3;
 637       pos -= (pos % 4);
 638
 639       while ((pos + 4) <= len)
 640         {
 641           if (bfd_getb32 (buf + pos) == 0)
 642             break;
 643           pos += 4;
 644         }
 645
 646       if ((pos + 4) > len)
 647         break;
 648
 649       ret = bfd_pef_parse_traceback_table (abfd, sec, buf, len, pos + 4,
 650                                            &function, 0);
 651       if (ret < 0)
 652         {
 653           /* Skip over 0x0L to advance to next possible traceback table.  */
 654           pos += 4;
 655           continue;
 656         }
 657
 658       BFD_ASSERT (function.name != NULL);
 659
 660       /* Don't bother to compute the name if we are just
 661          counting symbols.  */
 662       if (csym)
 663         {
 664           tbnamelen = strlen (tbprefix) + strlen (function.name);
 665           name = bfd_alloc (abfd, tbnamelen + 1);
 666           if (name == NULL)
 667             {
 668               bfd_release (abfd, (void *) function.name);
 669               function.name = NULL;
 670               break;
 671             }
 672           snprintf (name, tbnamelen + 1, "%s%s", tbprefix, function.name);
 673           traceback.name = name;
 674           traceback.value = pos;
 675           traceback.the_bfd = abfd;
 676           traceback.section = sec;
 677           traceback.flags = 0;
 678           traceback.udata.i = ret;
 679
 680           *(csym[count]) = function;
 681           *(csym[count + 1]) = traceback;
 682         }
 683
 684       pos += ret;
 685       count += 2;
 686     }
 687
 688   *nsym = count;
 689   return 0;
 690 }
 691
 692 static int
 693 bfd_pef_parse_function_stub (bfd *abfd ATTRIBUTE_UNUSED,
 694                              unsigned char *buf,
 695                              size_t len,
 696                              unsigned long *offset)
 697 {
 698   BFD_ASSERT (len == 24);
 699
 700   if ((bfd_getb32 (buf) & 0xffff0000) != 0x81820000)
 701     return -1;
 702   if (bfd_getb32 (buf + 4) != 0x90410014)
 703     return -1;
 704   if (bfd_getb32 (buf + 8) != 0x800c0000)
 705     return -1;
 706   if (bfd_getb32 (buf + 12) != 0x804c0004)
 707     return -1;
 708   if (bfd_getb32 (buf + 16) != 0x7c0903a6)
 709     return -1;
 710   if (bfd_getb32 (buf + 20) != 0x4e800420)
 711     return -1;
 712
 713   if (offset != NULL)
 714     *offset = (bfd_getb32 (buf) & 0x0000ffff) / 4;
 715
 716   return 0;
 717 }
 718
 719 static int
 720 bfd_pef_parse_function_stubs (bfd *abfd,
 721                               asection *codesec,
 722                               unsigned char *codebuf,
 723                               size_t codelen,
 724                               unsigned char *loaderbuf,
 725                               size_t loaderlen,
 726                               unsigned long *nsym,
 727                               asymbol **csym)
 728 {
 729   const char *const sprefix = "__stub_";
 730
 731   size_t codepos = 0;
 732   unsigned long count = 0;
 733
 734   bfd_pef_loader_header header;
 735   bfd_pef_imported_library *libraries = NULL;
 736   bfd_pef_imported_symbol *imports = NULL;
 737
 738   unsigned long i;
 739   int ret;
 740
 741   if (loaderlen < 56)
 742     goto error;
 743
 744   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 745   if (ret < 0)
 746     goto error;
 747
 748   libraries = bfd_malloc
 749     (header.imported_library_count * sizeof (bfd_pef_imported_library));
 750   imports = bfd_malloc
 751     (header.total_imported_symbol_count * sizeof (bfd_pef_imported_symbol));
 752
 753   if (loaderlen < (56 + (header.imported_library_count * 24)))
 754     goto error;
 755   for (i = 0; i < header.imported_library_count; i++)
 756     {
 757       ret = bfd_pef_parse_imported_library
 758         (abfd, loaderbuf + 56 + (i * 24), 24, &libraries[i]);
 759       if (ret < 0)
 760         goto error;
 761     }
 762
 763   if (loaderlen < (56 + (header.imported_library_count * 24)
 764                    + (header.total_imported_symbol_count * 4)))
 765     goto error;
 766   for (i = 0; i < header.total_imported_symbol_count; i++)
 767     {
 768       ret = (bfd_pef_parse_imported_symbol
 769              (abfd,
 770               loaderbuf + 56 + (header.imported_library_count * 24) + (i * 4),
 771               4, &imports[i]));
 772       if (ret < 0)
 773         goto error;
 774     }
 775
 776   codepos = 0;
 777
 778   for (;;)
 779     {
 780       asymbol sym;
 781       const char *symname;
 782       char *name;
 783       unsigned long index;
 784       int ret;
 785
 786       if (csym && (csym[count] == NULL))
 787         break;
 788
 789       codepos += 3;
 790       codepos -= (codepos % 4);
 791
 792       while ((codepos + 4) <= codelen)
 793         {
 794           if ((bfd_getb32 (codebuf + codepos) & 0xffff0000) == 0x81820000)
 795             break;
 796           codepos += 4;
 797         }
 798
 799       if ((codepos + 4) > codelen)
 800         break;
 801
 802       ret = bfd_pef_parse_function_stub (abfd, codebuf + codepos, 24, &index);
 803       if (ret < 0)
 804         {
 805           codepos += 24;
 806           continue;
 807         }
 808
 809       if (index >= header.total_imported_symbol_count)
 810         {
 811           codepos += 24;
 812           continue;
 813         }
 814
 815       {
 816         size_t max, namelen;
 817         const char *s;
 818
 819         if (loaderlen < (header.loader_strings_offset + imports[index].name))
 820           goto error;
 821
 822         max = loaderlen - (header.loader_strings_offset + imports[index].name);
 823         symname = (char *) loaderbuf;
 824         symname += header.loader_strings_offset + imports[index].name;
 825         namelen = 0;
 826         for (s = symname; s < (symname + max); s++)
 827           {
 828             if (*s == '\0')
 829               break;
 830             if (! ISPRINT (*s))
 831               goto error;
 832             namelen++;
 833           }
 834         if (*s != '\0')
 835           goto error;
 836
 837         name = bfd_alloc (abfd, strlen (sprefix) + namelen + 1);
 838         if (name == NULL)
 839           break;
 840
 841         snprintf (name, strlen (sprefix) + namelen + 1, "%s%s",
 842                   sprefix, symname);
 843         sym.name = name;
 844       }
 845
 846       sym.value = codepos;
 847       sym.the_bfd = abfd;
 848       sym.section = codesec;
 849       sym.flags = 0;
 850       sym.udata.i = 0;
 851
 852       codepos += 24;
 853
 854       if (csym != NULL)
 855         *(csym[count]) = sym;
 856
 857       count++;
 858     }
 859
 860   goto end;
 861
 862  end:
 863   if (libraries != NULL)
 864     free (libraries);
 865   if (imports != NULL)
 866     free (imports);
 867   *nsym = count;
 868   return 0;
 869
 870  error:
 871   if (libraries != NULL)
 872     free (libraries);
 873   if (imports != NULL)
 874     free (imports);
 875   *nsym = count;
 876   return -1;
 877 }
 878
 879 static long
 880 bfd_pef_parse_symbols (bfd *abfd, asymbol **csym)
 881 {
 882   unsigned long count = 0;
 883
 884   asection *codesec = NULL;
 885   unsigned char *codebuf = NULL;
 886   size_t codelen = 0;
 887
 888   asection *loadersec = NULL;
 889   unsigned char *loaderbuf = NULL;
 890   size_t loaderlen = 0;
 891
 892   codesec = bfd_get_section_by_name (abfd, "code");
 893   if (codesec != NULL)
 894     {
 895       codelen = codesec->size;
 896       codebuf = bfd_malloc (codelen);
 897       if (bfd_seek (abfd, codesec->filepos, SEEK_SET) < 0)
 898         goto end;
 899       if (bfd_bread ((void *) codebuf, codelen, abfd) != codelen)
 900         goto end;
 901     }
 902
 903   loadersec = bfd_get_section_by_name (abfd, "loader");
 904   if (loadersec != NULL)
 905     {
 906       loaderlen = loadersec->size;
 907       loaderbuf = bfd_malloc (loaderlen);
 908       if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
 909         goto end;
 910       if (bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen)
 911         goto end;
 912     }
 913
 914   count = 0;
 915   if (codesec != NULL)
 916     {
 917       long ncount = 0;
 918       bfd_pef_parse_traceback_tables (abfd, codesec, codebuf, codelen,
 919                                       &ncount, csym);
 920       count += ncount;
 921     }
 922
 923   if ((codesec != NULL) && (loadersec != NULL))
 924     {
 925       unsigned long ncount = 0;
 926       bfd_pef_parse_function_stubs
 927         (abfd, codesec, codebuf, codelen, loaderbuf, loaderlen, &ncount,
 928          (csym != NULL) ? (csym + count) : NULL);
 929       count += ncount;
 930     }
 931
 932   if (csym != NULL)
 933     csym[count] = NULL;
 934
 935  end:
 936   if (codebuf != NULL)
 937     free (codebuf);
 938
 939   if (loaderbuf != NULL)
 940     free (loaderbuf);
 941
 942   return count;
 943 }
 944
 945 static long
 946 bfd_pef_count_symbols (bfd *abfd)
 947 {
 948   return bfd_pef_parse_symbols (abfd, NULL);
 949 }
 950
 951 static long
 952 bfd_pef_get_symtab_upper_bound (bfd *abfd)
 953 {
 954   long nsyms = bfd_pef_count_symbols (abfd);
 955
 956   if (nsyms < 0)
 957     return nsyms;
 958   return ((nsyms + 1) * sizeof (asymbol *));
 959 }
 960
 961 static long
 962 bfd_pef_canonicalize_symtab (bfd *abfd, asymbol **alocation)
 963 {
 964   long i;
 965   asymbol *syms;
 966   long ret;
 967   long nsyms = bfd_pef_count_symbols (abfd);
 968
 969   if (nsyms < 0)
 970     return nsyms;
 971
 972   syms = bfd_alloc (abfd, nsyms * sizeof (asymbol));
 973   if (syms == NULL)
 974     return -1;
 975
 976   for (i = 0; i < nsyms; i++)
 977     alocation[i] = &syms[i];
 978
 979   alocation[nsyms] = NULL;
 980
 981   ret = bfd_pef_parse_symbols (abfd, alocation);
 982   if (ret != nsyms)
 983     return 0;
 984
 985   return ret;
 986 }
 987
 988 #define bfd_pef_make_empty_symbol _bfd_generic_make_empty_symbol
 989
 990 static void
 991 bfd_pef_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
 992                          asymbol *symbol,
 993                          symbol_info *ret)
 994 {
 995   bfd_symbol_info (symbol, ret);
 996 }
 997
 998 static int
 999 bfd_pef_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
1000                         struct bfd_link_info *info ATTRIBUTE_UNUSED)
1001 {
1002   return 0;
1003 }
1004
1005 const bfd_target pef_vec =
1006 {
1007   "pef",                        /* Name.  */
1008   bfd_target_pef_flavour,       /* Flavour.  */
1009   BFD_ENDIAN_BIG,               /* Byteorder.  */
1010   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1011   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1012    HAS_LINENO | HAS_DEBUG |
1013    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1014   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1015    | SEC_ROM | SEC_HAS_CONTENTS), /* Section_flags.  */
1016   0,                            /* Symbol_leading_char.  */
1017   ' ',                          /* AR_pad_char.  */
1018   16,                           /* AR_max_namelen.  */
1019   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1020   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1021   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
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,   /* Headers.  */
1025   {                             /* bfd_check_format.  */
1026     _bfd_dummy_target,
1027     bfd_pef_object_p,           /* bfd_check_format.  */
1028     _bfd_dummy_target,
1029     _bfd_dummy_target,
1030   },
1031   {                             /* bfd_set_format.  */
1032     bfd_false,
1033     bfd_pef_mkobject,
1034     bfd_false,
1035     bfd_false,
1036   },
1037   {                             /* bfd_write_contents.  */
1038     bfd_false,
1039     bfd_true,
1040     bfd_false,
1041     bfd_false,
1042   },
1043
1044   BFD_JUMP_TABLE_GENERIC (bfd_pef),
1045   BFD_JUMP_TABLE_COPY (_bfd_generic),
1046   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1047   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1048   BFD_JUMP_TABLE_SYMBOLS (bfd_pef),
1049   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1050   BFD_JUMP_TABLE_WRITE (bfd_pef),
1051   BFD_JUMP_TABLE_LINK (bfd_pef),
1052   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1053
1054   NULL,
1055
1056   NULL
1057 };
1058
1059 #define bfd_pef_xlib_close_and_cleanup              _bfd_generic_close_and_cleanup
1060 #define bfd_pef_xlib_bfd_free_cached_info           _bfd_generic_bfd_free_cached_info
1061 #define bfd_pef_xlib_new_section_hook               _bfd_generic_new_section_hook
1062 #define bfd_pef_xlib_get_section_contents           _bfd_generic_get_section_contents
1063 #define bfd_pef_xlib_set_section_contents           _bfd_generic_set_section_contents
1064 #define bfd_pef_xlib_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
1065 #define bfd_pef_xlib_set_section_contents_in_window _bfd_generic_set_section_contents_in_window
1066
1067 static int
1068 bfd_pef_xlib_read_header (bfd *abfd, bfd_pef_xlib_header *header)
1069 {
1070   unsigned char buf[76];
1071
1072   bfd_seek (abfd, 0, SEEK_SET);
1073
1074   if (bfd_bread ((void *) buf, 76, abfd) != 76)
1075     return -1;
1076
1077   header->tag1 = bfd_getb32 (buf);
1078   header->tag2 = bfd_getb32 (buf + 4);
1079   header->current_format = bfd_getb32 (buf + 8);
1080   header->container_strings_offset = bfd_getb32 (buf + 12);
1081   header->export_hash_offset = bfd_getb32 (buf + 16);
1082   header->export_key_offset = bfd_getb32 (buf + 20);
1083   header->export_symbol_offset = bfd_getb32 (buf + 24);
1084   header->export_names_offset = bfd_getb32 (buf + 28);
1085   header->export_hash_table_power = bfd_getb32 (buf + 32);
1086   header->exported_symbol_count = bfd_getb32 (buf + 36);
1087   header->frag_name_offset = bfd_getb32 (buf + 40);
1088   header->frag_name_length = bfd_getb32 (buf + 44);
1089   header->dylib_path_offset = bfd_getb32 (buf + 48);
1090   header->dylib_path_length = bfd_getb32 (buf + 52);
1091   header->cpu_family = bfd_getb32 (buf + 56);
1092   header->cpu_model = bfd_getb32 (buf + 60);
1093   header->date_time_stamp = bfd_getb32 (buf + 64);
1094   header->current_version = bfd_getb32 (buf + 68);
1095   header->old_definition_version = bfd_getb32 (buf + 72);
1096   header->old_implementation_version = bfd_getb32 (buf + 76);
1097
1098   return 0;
1099 }
1100
1101 static int
1102 bfd_pef_xlib_scan (bfd *abfd, bfd_pef_xlib_header *header)
1103 {
1104   bfd_pef_xlib_data_struct *mdata = NULL;
1105
1106   mdata = bfd_alloc (abfd, sizeof (* mdata));
1107   if (mdata == NULL)
1108     return -1;
1109
1110   mdata->header = *header;
1111
1112   abfd->flags = (abfd->xvec->object_flags
1113                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
1114
1115   abfd->tdata.pef_xlib_data = mdata;
1116
1117   return 0;
1118 }
1119
1120 static const bfd_target *
1121 bfd_pef_xlib_object_p (bfd *abfd)
1122 {
1123   struct bfd_preserve preserve;
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_preserve_save (abfd, &preserve))
1141     {
1142       bfd_set_error (bfd_error_wrong_format);
1143       return NULL;
1144     }
1145
1146   if (bfd_pef_xlib_scan (abfd, &header) != 0)
1147     {
1148       bfd_preserve_restore (abfd, &preserve);
1149       bfd_set_error (bfd_error_wrong_format);
1150       return NULL;
1151     }
1152
1153   bfd_preserve_finish (abfd, &preserve);
1154   return abfd->xvec;
1155 }
1156
1157 const bfd_target pef_xlib_vec =
1158 {
1159   "pef-xlib",                   /* Name.  */
1160   bfd_target_pef_xlib_flavour,  /* Flavour.  */
1161   BFD_ENDIAN_BIG,               /* Byteorder */
1162   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1163   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1164    HAS_LINENO | HAS_DEBUG |
1165    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1166   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1167    | SEC_ROM | SEC_HAS_CONTENTS),/* Section_flags.  */
1168   0,                            /* Symbol_leading_char.  */
1169   ' ',                          /* AR_pad_char.  */
1170   16,                           /* AR_max_namelen.  */
1171   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1172   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1173   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1174   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1175   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1176   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1177   {                             /* bfd_check_format.  */
1178     _bfd_dummy_target,
1179     bfd_pef_xlib_object_p,      /* bfd_check_format.  */
1180     _bfd_dummy_target,
1181     _bfd_dummy_target,
1182   },
1183   {                             /* bfd_set_format.  */
1184     bfd_false,
1185     bfd_pef_mkobject,
1186     bfd_false,
1187     bfd_false,
1188   },
1189   {                             /* bfd_write_contents.  */
1190     bfd_false,
1191     bfd_true,
1192     bfd_false,
1193     bfd_false,
1194   },
1195
1196   BFD_JUMP_TABLE_GENERIC (bfd_pef_xlib),
1197   BFD_JUMP_TABLE_COPY (_bfd_generic),
1198   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1199   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1200   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
1201   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1202   BFD_JUMP_TABLE_WRITE (_bfd_nowrite),
1203   BFD_JUMP_TABLE_LINK (_bfd_nolink),
1204   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1205
1206   NULL,
1207
1208   NULL
1209 };