bfd/pef.c

   1 /* PEF support for BFD.
   2    Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   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_define_common_symbol            bfd_generic_define_common_symbol
  56 #define bfd_pef_bfd_link_hash_table_create          _bfd_generic_link_hash_table_create
  57 #define bfd_pef_bfd_link_hash_table_free            _bfd_generic_link_hash_table_free
  58 #define bfd_pef_bfd_link_add_symbols                _bfd_generic_link_add_symbols
  59 #define bfd_pef_bfd_link_just_syms                  _bfd_generic_link_just_syms
  60 #define bfd_pef_bfd_final_link                      _bfd_generic_final_link
  61 #define bfd_pef_bfd_link_split_section              _bfd_generic_link_split_section
  62 #define bfd_pef_get_section_contents_in_window      _bfd_generic_get_section_contents_in_window
  63
  64 static int
  65 bfd_pef_parse_traceback_table (bfd *abfd,
  66                                asection *section,
  67                                unsigned char *buf,
  68                                size_t len,
  69                                size_t pos,
  70                                asymbol *sym,
  71                                FILE *file)
  72 {
  73   struct traceback_table table;
  74   size_t offset;
  75   const char *s;
  76   asymbol tmpsymbol;
  77
  78   if (sym == NULL)
  79     sym = & tmpsymbol;
  80
  81   sym->name = NULL;
  82   sym->value = 0;
  83   sym->the_bfd = abfd;
  84   sym->section = section;
  85   sym->flags = 0;
  86   sym->udata.i = 0;
  87
  88   /* memcpy is fine since all fields are unsigned char.  */
  89   if ((pos + 8) > len)
  90     return -1;
  91   memcpy (&table, buf + pos, 8);
  92
  93   /* Calling code relies on returned symbols having a name and
  94      correct offset.  */
  95   if ((table.lang != TB_C) && (table.lang != TB_CPLUSPLUS))
  96     return -1;
  97
  98   if (! (table.flags2 & TB_NAME_PRESENT))
  99     return -1;
 100
 101   if (! (table.flags1 & TB_HAS_TBOFF))
 102     return -1;
 103
 104   offset = 8;
 105
 106   if ((table.flags5 & TB_FLOATPARAMS) || (table.fixedparams))
 107     offset += 4;
 108
 109   if (table.flags1 & TB_HAS_TBOFF)
 110     {
 111       struct traceback_table_tboff off;
 112
 113       if ((pos + offset + 4) > len)
 114         return -1;
 115       off.tb_offset = bfd_getb32 (buf + pos + offset);
 116       offset += 4;
 117
 118       /* Need to subtract 4 because the offset includes the 0x0L
 119          preceding the table.  */
 120       if (file != NULL)
 121         fprintf (file, " [offset = 0x%lx]", off.tb_offset);
 122
 123       if ((file == NULL) && ((off.tb_offset + 4) > (pos + offset)))
 124         return -1;
 125
 126       sym->value = pos - off.tb_offset - 4;
 127     }
 128
 129   if (table.flags2 & TB_INT_HNDL)
 130     offset += 4;
 131
 132   if (table.flags1 & TB_HAS_CTL)
 133     {
 134       struct traceback_table_anchors anchors;
 135
 136       if ((pos + offset + 4) > len)
 137         return -1;
 138       anchors.ctl_info = bfd_getb32 (buf + pos + offset);
 139       offset += 4;
 140
 141       if (anchors.ctl_info > 1024)
 142         return -1;
 143
 144       offset += anchors.ctl_info * 4;
 145     }
 146
 147   if (table.flags2 & TB_NAME_PRESENT)
 148     {
 149       struct traceback_table_routine name;
 150       char *namebuf;
 151
 152       if ((pos + offset + 2) > len)
 153         return -1;
 154       name.name_len = bfd_getb16 (buf + pos + offset);
 155       offset += 2;
 156
 157       if (name.name_len > 4096)
 158         return -1;
 159
 160       if ((pos + offset + name.name_len) > len)
 161         return -1;
 162
 163       namebuf = bfd_alloc (abfd, name.name_len + 1);
 164       if (namebuf == NULL)
 165         return -1;
 166
 167       memcpy (namebuf, buf + pos + offset, name.name_len);
 168       namebuf[name.name_len] = '\0';
 169
 170       /* Strip leading period inserted by compiler.  */
 171       if (namebuf[0] == '.')
 172         memmove (namebuf, namebuf + 1, name.name_len + 1);
 173
 174       sym->name = namebuf;
 175
 176       for (s = sym->name; (*s != '\0'); s++)
 177         if (! ISPRINT (*s))
 178           return -1;
 179
 180       offset += name.name_len;
 181     }
 182
 183   if (table.flags2 & TB_USES_ALLOCA)
 184     offset += 4;
 185
 186   if (table.flags4 & TB_HAS_VEC_INFO)
 187     offset += 4;
 188
 189   if (file != NULL)
 190     fprintf (file, " [length = 0x%lx]", (unsigned long) offset);
 191
 192   return offset;
 193 }
 194
 195 static void
 196 bfd_pef_print_symbol (bfd *abfd,
 197                       void * afile,
 198                       asymbol *symbol,
 199                       bfd_print_symbol_type how)
 200 {
 201   FILE *file = (FILE *) afile;
 202
 203   switch (how)
 204     {
 205     case bfd_print_symbol_name:
 206       fprintf (file, "%s", symbol->name);
 207       break;
 208     default:
 209       bfd_print_symbol_vandf (abfd, (void *) file, symbol);
 210       fprintf (file, " %-5s %s", symbol->section->name, symbol->name);
 211       if (CONST_STRNEQ (symbol->name, "__traceback_"))
 212         {
 213           unsigned char *buf = alloca (symbol->udata.i);
 214           size_t offset = symbol->value + 4;
 215           size_t len = symbol->udata.i;
 216           int ret;
 217
 218           bfd_get_section_contents (abfd, symbol->section, buf, offset, len);
 219           ret = bfd_pef_parse_traceback_table (abfd, symbol->section, buf,
 220                                                len, 0, NULL, file);
 221           if (ret < 0)
 222             fprintf (file, " [ERROR]");
 223         }
 224     }
 225 }
 226
 227 static void
 228 bfd_pef_convert_architecture (unsigned long architecture,
 229                               enum bfd_architecture *type,
 230                               unsigned long *subtype)
 231 {
 232   const unsigned long ARCH_POWERPC = 0x70777063; /* 'pwpc'.  */
 233   const unsigned long ARCH_M68K = 0x6d36386b; /* 'm68k'.  */
 234
 235   *subtype = bfd_arch_unknown;
 236   *type = bfd_arch_unknown;
 237
 238   if (architecture == ARCH_POWERPC)
 239     *type = bfd_arch_powerpc;
 240   else if (architecture == ARCH_M68K)
 241     *type = bfd_arch_m68k;
 242 }
 243
 244 static bfd_boolean
 245 bfd_pef_mkobject (bfd *abfd ATTRIBUTE_UNUSED)
 246 {
 247   return TRUE;
 248 }
 249
 250 static const char *bfd_pef_section_name (bfd_pef_section *section)
 251 {
 252   switch (section->section_kind)
 253     {
 254     case BFD_PEF_SECTION_CODE: return "code";
 255     case BFD_PEF_SECTION_UNPACKED_DATA: return "unpacked-data";
 256     case BFD_PEF_SECTION_PACKED_DATA: return "packed-data";
 257     case BFD_PEF_SECTION_CONSTANT: return "constant";
 258     case BFD_PEF_SECTION_LOADER: return "loader";
 259     case BFD_PEF_SECTION_DEBUG: return "debug";
 260     case BFD_PEF_SECTION_EXEC_DATA: return "exec-data";
 261     case BFD_PEF_SECTION_EXCEPTION: return "exception";
 262     case BFD_PEF_SECTION_TRACEBACK: return "traceback";
 263     default: return "unknown";
 264     }
 265 }
 266
 267 static unsigned long bfd_pef_section_flags (bfd_pef_section *section)
 268 {
 269   switch (section->section_kind)
 270     {
 271     case BFD_PEF_SECTION_CODE:
 272       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
 273     case BFD_PEF_SECTION_UNPACKED_DATA:
 274     case BFD_PEF_SECTION_PACKED_DATA:
 275     case BFD_PEF_SECTION_CONSTANT:
 276     case BFD_PEF_SECTION_LOADER:
 277     case BFD_PEF_SECTION_DEBUG:
 278     case BFD_PEF_SECTION_EXEC_DATA:
 279     case BFD_PEF_SECTION_EXCEPTION:
 280     case BFD_PEF_SECTION_TRACEBACK:
 281     default:
 282       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
 283     }
 284 }
 285
 286 static asection *
 287 bfd_pef_make_bfd_section (bfd *abfd, bfd_pef_section *section)
 288 {
 289   asection *bfdsec;
 290   const char *name = bfd_pef_section_name (section);
 291
 292   bfdsec = bfd_make_section_anyway (abfd, name);
 293   if (bfdsec == NULL)
 294     return NULL;
 295
 296   bfdsec->vma = section->default_address + section->container_offset;
 297   bfdsec->lma = section->default_address + section->container_offset;
 298   bfdsec->size = section->container_length;
 299   bfdsec->filepos = section->container_offset;
 300   bfdsec->alignment_power = section->alignment;
 301
 302   bfdsec->flags = bfd_pef_section_flags (section);
 303
 304   return bfdsec;
 305 }
 306
 307 int
 308 bfd_pef_parse_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 309                              unsigned char *buf,
 310                              size_t len,
 311                              bfd_pef_loader_header *header)
 312 {
 313   BFD_ASSERT (len == 56);
 314
 315   header->main_section = bfd_getb32 (buf);
 316   header->main_offset = bfd_getb32 (buf + 4);
 317   header->init_section = bfd_getb32 (buf + 8);
 318   header->init_offset = bfd_getb32 (buf + 12);
 319   header->term_section = bfd_getb32 (buf + 16);
 320   header->term_offset = bfd_getb32 (buf + 20);
 321   header->imported_library_count = bfd_getb32 (buf + 24);
 322   header->total_imported_symbol_count = bfd_getb32 (buf + 28);
 323   header->reloc_section_count = bfd_getb32 (buf + 32);
 324   header->reloc_instr_offset = bfd_getb32 (buf + 36);
 325   header->loader_strings_offset = bfd_getb32 (buf + 40);
 326   header->export_hash_offset = bfd_getb32 (buf + 44);
 327   header->export_hash_table_power = bfd_getb32 (buf + 48);
 328   header->exported_symbol_count = bfd_getb32 (buf + 52);
 329
 330   return 0;
 331 }
 332
 333 int
 334 bfd_pef_parse_imported_library (bfd *abfd ATTRIBUTE_UNUSED,
 335                                 unsigned char *buf,
 336                                 size_t len,
 337                                 bfd_pef_imported_library *header)
 338 {
 339   BFD_ASSERT (len == 24);
 340
 341   header->name_offset = bfd_getb32 (buf);
 342   header->old_implementation_version = bfd_getb32 (buf + 4);
 343   header->current_version = bfd_getb32 (buf + 8);
 344   header->imported_symbol_count = bfd_getb32 (buf + 12);
 345   header->first_imported_symbol = bfd_getb32 (buf + 16);
 346   header->options = buf[20];
 347   header->reserved_a = buf[21];
 348   header->reserved_b = bfd_getb16 (buf + 22);
 349
 350   return 0;
 351 }
 352
 353 int
 354 bfd_pef_parse_imported_symbol (bfd *abfd ATTRIBUTE_UNUSED,
 355                                unsigned char *buf,
 356                                size_t len,
 357                                bfd_pef_imported_symbol *symbol)
 358 {
 359   unsigned long value;
 360
 361   BFD_ASSERT (len == 4);
 362
 363   value = bfd_getb32 (buf);
 364   symbol->symbol_class = value >> 24;
 365   symbol->name = value & 0x00ffffff;
 366
 367   return 0;
 368 }
 369
 370 int
 371 bfd_pef_scan_section (bfd *abfd, bfd_pef_section *section)
 372 {
 373   unsigned char buf[28];
 374
 375   bfd_seek (abfd, section->header_offset, SEEK_SET);
 376   if (bfd_bread ((void *) buf, 28, abfd) != 28)
 377     return -1;
 378
 379   section->name_offset = bfd_h_get_32 (abfd, buf);
 380   section->default_address = bfd_h_get_32 (abfd, buf + 4);
 381   section->total_length = bfd_h_get_32 (abfd, buf + 8);
 382   section->unpacked_length = bfd_h_get_32 (abfd, buf + 12);
 383   section->container_length = bfd_h_get_32 (abfd, buf + 16);
 384   section->container_offset = bfd_h_get_32 (abfd, buf + 20);
 385   section->section_kind = buf[24];
 386   section->share_kind = buf[25];
 387   section->alignment = buf[26];
 388   section->reserved = buf[27];
 389
 390   section->bfd_section = bfd_pef_make_bfd_section (abfd, section);
 391   if (section->bfd_section == NULL)
 392     return -1;
 393
 394   return 0;
 395 }
 396
 397 void
 398 bfd_pef_print_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 399                              bfd_pef_loader_header *header,
 400                              FILE *file)
 401 {
 402   fprintf (file, "main_section: %ld\n", header->main_section);
 403   fprintf (file, "main_offset: %lu\n", header->main_offset);
 404   fprintf (file, "init_section: %ld\n", header->init_section);
 405   fprintf (file, "init_offset: %lu\n", header->init_offset);
 406   fprintf (file, "term_section: %ld\n", header->term_section);
 407   fprintf (file, "term_offset: %lu\n", header->term_offset);
 408   fprintf (file, "imported_library_count: %lu\n",
 409            header->imported_library_count);
 410   fprintf (file, "total_imported_symbol_count: %lu\n",
 411            header->total_imported_symbol_count);
 412   fprintf (file, "reloc_section_count: %lu\n", header->reloc_section_count);
 413   fprintf (file, "reloc_instr_offset: %lu\n", header->reloc_instr_offset);
 414   fprintf (file, "loader_strings_offset: %lu\n",
 415            header->loader_strings_offset);
 416   fprintf (file, "export_hash_offset: %lu\n", header->export_hash_offset);
 417   fprintf (file, "export_hash_table_power: %lu\n",
 418            header->export_hash_table_power);
 419   fprintf (file, "exported_symbol_count: %lu\n",
 420            header->exported_symbol_count);
 421 }
 422
 423 int
 424 bfd_pef_print_loader_section (bfd *abfd, FILE *file)
 425 {
 426   bfd_pef_loader_header header;
 427   asection *loadersec = NULL;
 428   unsigned char *loaderbuf = NULL;
 429   size_t loaderlen = 0;
 430
 431   loadersec = bfd_get_section_by_name (abfd, "loader");
 432   if (loadersec == NULL)
 433     return -1;
 434
 435   loaderlen = loadersec->size;
 436   loaderbuf = bfd_malloc (loaderlen);
 437
 438   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0
 439       || bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen
 440       || loaderlen < 56
 441       || bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header) < 0)
 442     {
 443       free (loaderbuf);
 444       return -1;
 445     }
 446
 447   bfd_pef_print_loader_header (abfd, &header, file);
 448   return 0;
 449 }
 450
 451 int
 452 bfd_pef_scan_start_address (bfd *abfd)
 453 {
 454   bfd_pef_loader_header header;
 455   asection *section;
 456
 457   asection *loadersec = NULL;
 458   unsigned char *loaderbuf = NULL;
 459   size_t loaderlen = 0;
 460   int ret;
 461
 462   loadersec = bfd_get_section_by_name (abfd, "loader");
 463   if (loadersec == NULL)
 464     goto end;
 465
 466   loaderlen = loadersec->size;
 467   loaderbuf = bfd_malloc (loaderlen);
 468   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
 469     goto error;
 470   if (bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen)
 471     goto error;
 472
 473   if (loaderlen < 56)
 474     goto error;
 475   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 476   if (ret < 0)
 477     goto error;
 478
 479   if (header.main_section < 0)
 480     goto end;
 481
 482   for (section = abfd->sections; section != NULL; section = section->next)
 483     if ((section->index + 1) == header.main_section)
 484       break;
 485
 486   if (section == NULL)
 487     goto error;
 488
 489   abfd->start_address = section->vma + header.main_offset;
 490
 491  end:
 492   if (loaderbuf != NULL)
 493     free (loaderbuf);
 494   return 0;
 495
 496  error:
 497   if (loaderbuf != NULL)
 498     free (loaderbuf);
 499   return -1;
 500 }
 501
 502 int
 503 bfd_pef_scan (abfd, header, mdata)
 504      bfd *abfd;
 505      bfd_pef_header *header;
 506      bfd_pef_data_struct *mdata;
 507 {
 508   unsigned int i;
 509   enum bfd_architecture cputype;
 510   unsigned long cpusubtype;
 511
 512   mdata->header = *header;
 513
 514   bfd_pef_convert_architecture (header->architecture, &cputype, &cpusubtype);
 515   if (cputype == bfd_arch_unknown)
 516     {
 517       fprintf (stderr, "bfd_pef_scan: unknown architecture 0x%lx\n",
 518                header->architecture);
 519       return -1;
 520     }
 521   bfd_set_arch_mach (abfd, cputype, cpusubtype);
 522
 523   mdata->header = *header;
 524
 525   abfd->flags = (abfd->xvec->object_flags
 526                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
 527
 528   if (header->section_count != 0)
 529     {
 530       mdata->sections = bfd_alloc (abfd, header->section_count * sizeof (bfd_pef_section));
 531
 532       if (mdata->sections == NULL)
 533         return -1;
 534
 535       for (i = 0; i < header->section_count; i++)
 536         {
 537           bfd_pef_section *cur = &mdata->sections[i];
 538           cur->header_offset = 40 + (i * 28);
 539           if (bfd_pef_scan_section (abfd, cur) < 0)
 540             return -1;
 541         }
 542     }
 543
 544   if (bfd_pef_scan_start_address (abfd) < 0)
 545     return -1;
 546
 547   abfd->tdata.pef_data = mdata;
 548
 549   return 0;
 550 }
 551
 552 static int
 553 bfd_pef_read_header (bfd *abfd, bfd_pef_header *header)
 554 {
 555   unsigned char buf[40];
 556
 557   bfd_seek (abfd, 0, SEEK_SET);
 558
 559   if (bfd_bread ((void *) buf, 40, abfd) != 40)
 560     return -1;
 561
 562   header->tag1 = bfd_getb32 (buf);
 563   header->tag2 = bfd_getb32 (buf + 4);
 564   header->architecture = bfd_getb32 (buf + 8);
 565   header->format_version = bfd_getb32 (buf + 12);
 566   header->timestamp = bfd_getb32 (buf + 16);
 567   header->old_definition_version = bfd_getb32 (buf + 20);
 568   header->old_implementation_version = bfd_getb32 (buf + 24);
 569   header->current_version = bfd_getb32 (buf + 28);
 570   header->section_count = bfd_getb32 (buf + 32) + 1;
 571   header->instantiated_section_count = bfd_getb32 (buf + 34);
 572   header->reserved = bfd_getb32 (buf + 36);
 573
 574   return 0;
 575 }
 576
 577 static const bfd_target *
 578 bfd_pef_object_p (bfd *abfd)
 579 {
 580   struct bfd_preserve preserve;
 581   bfd_pef_header header;
 582
 583   preserve.marker = NULL;
 584   if (bfd_pef_read_header (abfd, &header) != 0)
 585     goto wrong;
 586
 587   if (header.tag1 != BFD_PEF_TAG1 || header.tag2 != BFD_PEF_TAG2)
 588     goto wrong;
 589
 590   preserve.marker = bfd_zalloc (abfd, sizeof (bfd_pef_data_struct));
 591   if (preserve.marker == NULL
 592       || !bfd_preserve_save (abfd, &preserve))
 593     goto fail;
 594
 595   if (bfd_pef_scan (abfd, &header,
 596                     (bfd_pef_data_struct *) preserve.marker) != 0)
 597     goto wrong;
 598
 599   bfd_preserve_finish (abfd, &preserve);
 600   return abfd->xvec;
 601
 602  wrong:
 603   bfd_set_error (bfd_error_wrong_format);
 604
 605  fail:
 606   if (preserve.marker != NULL)
 607     bfd_preserve_restore (abfd, &preserve);
 608   return NULL;
 609 }
 610
 611 static int
 612 bfd_pef_parse_traceback_tables (bfd *abfd,
 613                                 asection *sec,
 614                                 unsigned char *buf,
 615                                 size_t len,
 616                                 long *nsym,
 617                                 asymbol **csym)
 618 {
 619   char *name;
 620
 621   asymbol function;
 622   asymbol traceback;
 623
 624   const char *const tbprefix = "__traceback_";
 625   size_t tbnamelen;
 626
 627   size_t pos = 0;
 628   unsigned long count = 0;
 629   int ret;
 630
 631   for (;;)
 632     {
 633       /* We're reading symbols two at a time.  */
 634       if (csym && ((csym[count] == NULL) || (csym[count + 1] == NULL)))
 635         break;
 636
 637       pos += 3;
 638       pos -= (pos % 4);
 639
 640       while ((pos + 4) <= len)
 641         {
 642           if (bfd_getb32 (buf + pos) == 0)
 643             break;
 644           pos += 4;
 645         }
 646
 647       if ((pos + 4) > len)
 648         break;
 649
 650       ret = bfd_pef_parse_traceback_table (abfd, sec, buf, len, pos + 4,
 651                                            &function, 0);
 652       if (ret < 0)
 653         {
 654           /* Skip over 0x0L to advance to next possible traceback table.  */
 655           pos += 4;
 656           continue;
 657         }
 658
 659       BFD_ASSERT (function.name != NULL);
 660
 661       /* Don't bother to compute the name if we are just
 662          counting symbols.  */
 663       if (csym)
 664         {
 665           tbnamelen = strlen (tbprefix) + strlen (function.name);
 666           name = bfd_alloc (abfd, tbnamelen + 1);
 667           if (name == NULL)
 668             {
 669               bfd_release (abfd, (void *) function.name);
 670               function.name = NULL;
 671               break;
 672             }
 673           snprintf (name, tbnamelen + 1, "%s%s", tbprefix, function.name);
 674           traceback.name = name;
 675           traceback.value = pos;
 676           traceback.the_bfd = abfd;
 677           traceback.section = sec;
 678           traceback.flags = 0;
 679           traceback.udata.i = ret;
 680
 681           *(csym[count]) = function;
 682           *(csym[count + 1]) = traceback;
 683         }
 684
 685       pos += ret;
 686       count += 2;
 687     }
 688
 689   *nsym = count;
 690   return 0;
 691 }
 692
 693 static int
 694 bfd_pef_parse_function_stub (bfd *abfd ATTRIBUTE_UNUSED,
 695                              unsigned char *buf,
 696                              size_t len,
 697                              unsigned long *offset)
 698 {
 699   BFD_ASSERT (len == 24);
 700
 701   if ((bfd_getb32 (buf) & 0xffff0000) != 0x81820000)
 702     return -1;
 703   if (bfd_getb32 (buf + 4) != 0x90410014)
 704     return -1;
 705   if (bfd_getb32 (buf + 8) != 0x800c0000)
 706     return -1;
 707   if (bfd_getb32 (buf + 12) != 0x804c0004)
 708     return -1;
 709   if (bfd_getb32 (buf + 16) != 0x7c0903a6)
 710     return -1;
 711   if (bfd_getb32 (buf + 20) != 0x4e800420)
 712     return -1;
 713
 714   if (offset != NULL)
 715     *offset = (bfd_getb32 (buf) & 0x0000ffff) / 4;
 716
 717   return 0;
 718 }
 719
 720 static int
 721 bfd_pef_parse_function_stubs (bfd *abfd,
 722                               asection *codesec,
 723                               unsigned char *codebuf,
 724                               size_t codelen,
 725                               unsigned char *loaderbuf,
 726                               size_t loaderlen,
 727                               unsigned long *nsym,
 728                               asymbol **csym)
 729 {
 730   const char *const sprefix = "__stub_";
 731
 732   size_t codepos = 0;
 733   unsigned long count = 0;
 734
 735   bfd_pef_loader_header header;
 736   bfd_pef_imported_library *libraries = NULL;
 737   bfd_pef_imported_symbol *imports = NULL;
 738
 739   unsigned long i;
 740   int ret;
 741
 742   if (loaderlen < 56)
 743     goto error;
 744
 745   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 746   if (ret < 0)
 747     goto error;
 748
 749   libraries = bfd_malloc
 750     (header.imported_library_count * sizeof (bfd_pef_imported_library));
 751   imports = bfd_malloc
 752     (header.total_imported_symbol_count * sizeof (bfd_pef_imported_symbol));
 753
 754   if (loaderlen < (56 + (header.imported_library_count * 24)))
 755     goto error;
 756   for (i = 0; i < header.imported_library_count; i++)
 757     {
 758       ret = bfd_pef_parse_imported_library
 759         (abfd, loaderbuf + 56 + (i * 24), 24, &libraries[i]);
 760       if (ret < 0)
 761         goto error;
 762     }
 763
 764   if (loaderlen < (56 + (header.imported_library_count * 24)
 765                    + (header.total_imported_symbol_count * 4)))
 766     goto error;
 767   for (i = 0; i < header.total_imported_symbol_count; i++)
 768     {
 769       ret = (bfd_pef_parse_imported_symbol
 770              (abfd,
 771               loaderbuf + 56 + (header.imported_library_count * 24) + (i * 4),
 772               4, &imports[i]));
 773       if (ret < 0)
 774         goto error;
 775     }
 776
 777   codepos = 0;
 778
 779   for (;;)
 780     {
 781       asymbol sym;
 782       const char *symname;
 783       char *name;
 784       unsigned long index;
 785       int ret;
 786
 787       if (csym && (csym[count] == NULL))
 788         break;
 789
 790       codepos += 3;
 791       codepos -= (codepos % 4);
 792
 793       while ((codepos + 4) <= codelen)
 794         {
 795           if ((bfd_getb32 (codebuf + codepos) & 0xffff0000) == 0x81820000)
 796             break;
 797           codepos += 4;
 798         }
 799
 800       if ((codepos + 4) > codelen)
 801         break;
 802
 803       ret = bfd_pef_parse_function_stub (abfd, codebuf + codepos, 24, &index);
 804       if (ret < 0)
 805         {
 806           codepos += 24;
 807           continue;
 808         }
 809
 810       if (index >= header.total_imported_symbol_count)
 811         {
 812           codepos += 24;
 813           continue;
 814         }
 815
 816       {
 817         size_t max, namelen;
 818         const char *s;
 819
 820         if (loaderlen < (header.loader_strings_offset + imports[index].name))
 821           goto error;
 822
 823         max = loaderlen - (header.loader_strings_offset + imports[index].name);
 824         symname = (char *) loaderbuf;
 825         symname += header.loader_strings_offset + imports[index].name;
 826         namelen = 0;
 827         for (s = symname; s < (symname + max); s++)
 828           {
 829             if (*s == '\0')
 830               break;
 831             if (! ISPRINT (*s))
 832               goto error;
 833             namelen++;
 834           }
 835         if (*s != '\0')
 836           goto error;
 837
 838         name = bfd_alloc (abfd, strlen (sprefix) + namelen + 1);
 839         if (name == NULL)
 840           break;
 841
 842         snprintf (name, strlen (sprefix) + namelen + 1, "%s%s",
 843                   sprefix, symname);
 844         sym.name = name;
 845       }
 846
 847       sym.value = codepos;
 848       sym.the_bfd = abfd;
 849       sym.section = codesec;
 850       sym.flags = 0;
 851       sym.udata.i = 0;
 852
 853       codepos += 24;
 854
 855       if (csym != NULL)
 856         *(csym[count]) = sym;
 857
 858       count++;
 859     }
 860
 861   goto end;
 862
 863  end:
 864   if (libraries != NULL)
 865     free (libraries);
 866   if (imports != NULL)
 867     free (imports);
 868   *nsym = count;
 869   return 0;
 870
 871  error:
 872   if (libraries != NULL)
 873     free (libraries);
 874   if (imports != NULL)
 875     free (imports);
 876   *nsym = count;
 877   return -1;
 878 }
 879
 880 static long
 881 bfd_pef_parse_symbols (bfd *abfd, asymbol **csym)
 882 {
 883   unsigned long count = 0;
 884
 885   asection *codesec = NULL;
 886   unsigned char *codebuf = NULL;
 887   size_t codelen = 0;
 888
 889   asection *loadersec = NULL;
 890   unsigned char *loaderbuf = NULL;
 891   size_t loaderlen = 0;
 892
 893   codesec = bfd_get_section_by_name (abfd, "code");
 894   if (codesec != NULL)
 895     {
 896       codelen = codesec->size;
 897       codebuf = bfd_malloc (codelen);
 898       if (bfd_seek (abfd, codesec->filepos, SEEK_SET) < 0)
 899         goto end;
 900       if (bfd_bread ((void *) codebuf, codelen, abfd) != codelen)
 901         goto end;
 902     }
 903
 904   loadersec = bfd_get_section_by_name (abfd, "loader");
 905   if (loadersec != NULL)
 906     {
 907       loaderlen = loadersec->size;
 908       loaderbuf = bfd_malloc (loaderlen);
 909       if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
 910         goto end;
 911       if (bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen)
 912         goto end;
 913     }
 914
 915   count = 0;
 916   if (codesec != NULL)
 917     {
 918       long ncount = 0;
 919       bfd_pef_parse_traceback_tables (abfd, codesec, codebuf, codelen,
 920                                       &ncount, csym);
 921       count += ncount;
 922     }
 923
 924   if ((codesec != NULL) && (loadersec != NULL))
 925     {
 926       unsigned long ncount = 0;
 927       bfd_pef_parse_function_stubs
 928         (abfd, codesec, codebuf, codelen, loaderbuf, loaderlen, &ncount,
 929          (csym != NULL) ? (csym + count) : NULL);
 930       count += ncount;
 931     }
 932
 933   if (csym != NULL)
 934     csym[count] = NULL;
 935
 936  end:
 937   if (codebuf != NULL)
 938     free (codebuf);
 939
 940   if (loaderbuf != NULL)
 941     free (loaderbuf);
 942
 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   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1021   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1022   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1023   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1024   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1025   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1026   {                             /* bfd_check_format.  */
1027     _bfd_dummy_target,
1028     bfd_pef_object_p,           /* bfd_check_format.  */
1029     _bfd_dummy_target,
1030     _bfd_dummy_target,
1031   },
1032   {                             /* bfd_set_format.  */
1033     bfd_false,
1034     bfd_pef_mkobject,
1035     bfd_false,
1036     bfd_false,
1037   },
1038   {                             /* bfd_write_contents.  */
1039     bfd_false,
1040     bfd_true,
1041     bfd_false,
1042     bfd_false,
1043   },
1044
1045   BFD_JUMP_TABLE_GENERIC (bfd_pef),
1046   BFD_JUMP_TABLE_COPY (_bfd_generic),
1047   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1048   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1049   BFD_JUMP_TABLE_SYMBOLS (bfd_pef),
1050   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1051   BFD_JUMP_TABLE_WRITE (bfd_pef),
1052   BFD_JUMP_TABLE_LINK (bfd_pef),
1053   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1054
1055   NULL,
1056
1057   NULL
1058 };
1059
1060 #define bfd_pef_xlib_close_and_cleanup              _bfd_generic_close_and_cleanup
1061 #define bfd_pef_xlib_bfd_free_cached_info           _bfd_generic_bfd_free_cached_info
1062 #define bfd_pef_xlib_new_section_hook               _bfd_generic_new_section_hook
1063 #define bfd_pef_xlib_get_section_contents           _bfd_generic_get_section_contents
1064 #define bfd_pef_xlib_set_section_contents           _bfd_generic_set_section_contents
1065 #define bfd_pef_xlib_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
1066 #define bfd_pef_xlib_set_section_contents_in_window _bfd_generic_set_section_contents_in_window
1067
1068 static int
1069 bfd_pef_xlib_read_header (bfd *abfd, bfd_pef_xlib_header *header)
1070 {
1071   unsigned char buf[76];
1072
1073   bfd_seek (abfd, 0, SEEK_SET);
1074
1075   if (bfd_bread ((void *) buf, 76, abfd) != 76)
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 const bfd_target *
1122 bfd_pef_xlib_object_p (bfd *abfd)
1123 {
1124   struct bfd_preserve preserve;
1125   bfd_pef_xlib_header header;
1126
1127   if (bfd_pef_xlib_read_header (abfd, &header) != 0)
1128     {
1129       bfd_set_error (bfd_error_wrong_format);
1130       return NULL;
1131     }
1132
1133   if ((header.tag1 != BFD_PEF_XLIB_TAG1)
1134       || ((header.tag2 != BFD_PEF_VLIB_TAG2)
1135           && (header.tag2 != BFD_PEF_BLIB_TAG2)))
1136     {
1137       bfd_set_error (bfd_error_wrong_format);
1138       return NULL;
1139     }
1140
1141   if (! bfd_preserve_save (abfd, &preserve))
1142     {
1143       bfd_set_error (bfd_error_wrong_format);
1144       return NULL;
1145     }
1146
1147   if (bfd_pef_xlib_scan (abfd, &header) != 0)
1148     {
1149       bfd_preserve_restore (abfd, &preserve);
1150       bfd_set_error (bfd_error_wrong_format);
1151       return NULL;
1152     }
1153
1154   bfd_preserve_finish (abfd, &preserve);
1155   return abfd->xvec;
1156 }
1157
1158 const bfd_target pef_xlib_vec =
1159 {
1160   "pef-xlib",                   /* Name.  */
1161   bfd_target_pef_xlib_flavour,  /* Flavour.  */
1162   BFD_ENDIAN_BIG,               /* Byteorder */
1163   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1164   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1165    HAS_LINENO | HAS_DEBUG |
1166    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1167   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1168    | SEC_ROM | SEC_HAS_CONTENTS),/* Section_flags.  */
1169   0,                            /* Symbol_leading_char.  */
1170   ' ',                          /* AR_pad_char.  */
1171   16,                           /* AR_max_namelen.  */
1172   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1173   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1174   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1175   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1176   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1177   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1178   {                             /* bfd_check_format.  */
1179     _bfd_dummy_target,
1180     bfd_pef_xlib_object_p,      /* bfd_check_format.  */
1181     _bfd_dummy_target,
1182     _bfd_dummy_target,
1183   },
1184   {                             /* bfd_set_format.  */
1185     bfd_false,
1186     bfd_pef_mkobject,
1187     bfd_false,
1188     bfd_false,
1189   },
1190   {                             /* bfd_write_contents.  */
1191     bfd_false,
1192     bfd_true,
1193     bfd_false,
1194     bfd_false,
1195   },
1196
1197   BFD_JUMP_TABLE_GENERIC (bfd_pef_xlib),
1198   BFD_JUMP_TABLE_COPY (_bfd_generic),
1199   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1200   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1201   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
1202   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1203   BFD_JUMP_TABLE_WRITE (_bfd_nowrite),
1204   BFD_JUMP_TABLE_LINK (_bfd_nolink),
1205   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1206
1207   NULL,
1208
1209   NULL
1210 };