bfd/pef.c

   1 /* PEF support for BFD.
   2    Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
   3    2009, 2011  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_copy_link_hash_symbol_type \
  61   _bfd_generic_copy_link_hash_symbol_type
  62 #define bfd_pef_bfd_final_link                      _bfd_generic_final_link
  63 #define bfd_pef_bfd_link_split_section              _bfd_generic_link_split_section
  64 #define bfd_pef_get_section_contents_in_window      _bfd_generic_get_section_contents_in_window
  65
  66 static int
  67 bfd_pef_parse_traceback_table (bfd *abfd,
  68                                asection *section,
  69                                unsigned char *buf,
  70                                size_t len,
  71                                size_t pos,
  72                                asymbol *sym,
  73                                FILE *file)
  74 {
  75   struct traceback_table table;
  76   size_t offset;
  77   const char *s;
  78   asymbol tmpsymbol;
  79
  80   if (sym == NULL)
  81     sym = & tmpsymbol;
  82
  83   sym->name = NULL;
  84   sym->value = 0;
  85   sym->the_bfd = abfd;
  86   sym->section = section;
  87   sym->flags = 0;
  88   sym->udata.i = 0;
  89
  90   /* memcpy is fine since all fields are unsigned char.  */
  91   if ((pos + 8) > len)
  92     return -1;
  93   memcpy (&table, buf + pos, 8);
  94
  95   /* Calling code relies on returned symbols having a name and
  96      correct offset.  */
  97   if ((table.lang != TB_C) && (table.lang != TB_CPLUSPLUS))
  98     return -1;
  99
 100   if (! (table.flags2 & TB_NAME_PRESENT))
 101     return -1;
 102
 103   if (! (table.flags1 & TB_HAS_TBOFF))
 104     return -1;
 105
 106   offset = 8;
 107
 108   if ((table.flags5 & TB_FLOATPARAMS) || (table.fixedparams))
 109     offset += 4;
 110
 111   if (table.flags1 & TB_HAS_TBOFF)
 112     {
 113       struct traceback_table_tboff off;
 114
 115       if ((pos + offset + 4) > len)
 116         return -1;
 117       off.tb_offset = bfd_getb32 (buf + pos + offset);
 118       offset += 4;
 119
 120       /* Need to subtract 4 because the offset includes the 0x0L
 121          preceding the table.  */
 122       if (file != NULL)
 123         fprintf (file, " [offset = 0x%lx]", off.tb_offset);
 124
 125       if ((file == NULL) && ((off.tb_offset + 4) > (pos + offset)))
 126         return -1;
 127
 128       sym->value = pos - off.tb_offset - 4;
 129     }
 130
 131   if (table.flags2 & TB_INT_HNDL)
 132     offset += 4;
 133
 134   if (table.flags1 & TB_HAS_CTL)
 135     {
 136       struct traceback_table_anchors anchors;
 137
 138       if ((pos + offset + 4) > len)
 139         return -1;
 140       anchors.ctl_info = bfd_getb32 (buf + pos + offset);
 141       offset += 4;
 142
 143       if (anchors.ctl_info > 1024)
 144         return -1;
 145
 146       offset += anchors.ctl_info * 4;
 147     }
 148
 149   if (table.flags2 & TB_NAME_PRESENT)
 150     {
 151       struct traceback_table_routine name;
 152       char *namebuf;
 153
 154       if ((pos + offset + 2) > len)
 155         return -1;
 156       name.name_len = bfd_getb16 (buf + pos + offset);
 157       offset += 2;
 158
 159       if (name.name_len > 4096)
 160         return -1;
 161
 162       if ((pos + offset + name.name_len) > len)
 163         return -1;
 164
 165       namebuf = bfd_alloc (abfd, name.name_len + 1);
 166       if (namebuf == NULL)
 167         return -1;
 168
 169       memcpy (namebuf, buf + pos + offset, name.name_len);
 170       namebuf[name.name_len] = '\0';
 171
 172       /* Strip leading period inserted by compiler.  */
 173       if (namebuf[0] == '.')
 174         memmove (namebuf, namebuf + 1, name.name_len + 1);
 175
 176       sym->name = namebuf;
 177
 178       for (s = sym->name; (*s != '\0'); s++)
 179         if (! ISPRINT (*s))
 180           return -1;
 181
 182       offset += name.name_len;
 183     }
 184
 185   if (table.flags2 & TB_USES_ALLOCA)
 186     offset += 4;
 187
 188   if (table.flags4 & TB_HAS_VEC_INFO)
 189     offset += 4;
 190
 191   if (file != NULL)
 192     fprintf (file, " [length = 0x%lx]", (unsigned long) offset);
 193
 194   return offset;
 195 }
 196
 197 static void
 198 bfd_pef_print_symbol (bfd *abfd,
 199                       void * afile,
 200                       asymbol *symbol,
 201                       bfd_print_symbol_type how)
 202 {
 203   FILE *file = (FILE *) afile;
 204
 205   switch (how)
 206     {
 207     case bfd_print_symbol_name:
 208       fprintf (file, "%s", symbol->name);
 209       break;
 210     default:
 211       bfd_print_symbol_vandf (abfd, (void *) file, symbol);
 212       fprintf (file, " %-5s %s", symbol->section->name, symbol->name);
 213       if (CONST_STRNEQ (symbol->name, "__traceback_"))
 214         {
 215           unsigned char *buf = alloca (symbol->udata.i);
 216           size_t offset = symbol->value + 4;
 217           size_t len = symbol->udata.i;
 218           int ret;
 219
 220           bfd_get_section_contents (abfd, symbol->section, buf, offset, len);
 221           ret = bfd_pef_parse_traceback_table (abfd, symbol->section, buf,
 222                                                len, 0, NULL, file);
 223           if (ret < 0)
 224             fprintf (file, " [ERROR]");
 225         }
 226     }
 227 }
 228
 229 static void
 230 bfd_pef_convert_architecture (unsigned long architecture,
 231                               enum bfd_architecture *type,
 232                               unsigned long *subtype)
 233 {
 234   const unsigned long ARCH_POWERPC = 0x70777063; /* 'pwpc'.  */
 235   const unsigned long ARCH_M68K = 0x6d36386b; /* 'm68k'.  */
 236
 237   *subtype = bfd_arch_unknown;
 238   *type = bfd_arch_unknown;
 239
 240   if (architecture == ARCH_POWERPC)
 241     *type = bfd_arch_powerpc;
 242   else if (architecture == ARCH_M68K)
 243     *type = bfd_arch_m68k;
 244 }
 245
 246 static bfd_boolean
 247 bfd_pef_mkobject (bfd *abfd ATTRIBUTE_UNUSED)
 248 {
 249   return TRUE;
 250 }
 251
 252 static const char *bfd_pef_section_name (bfd_pef_section *section)
 253 {
 254   switch (section->section_kind)
 255     {
 256     case BFD_PEF_SECTION_CODE: return "code";
 257     case BFD_PEF_SECTION_UNPACKED_DATA: return "unpacked-data";
 258     case BFD_PEF_SECTION_PACKED_DATA: return "packed-data";
 259     case BFD_PEF_SECTION_CONSTANT: return "constant";
 260     case BFD_PEF_SECTION_LOADER: return "loader";
 261     case BFD_PEF_SECTION_DEBUG: return "debug";
 262     case BFD_PEF_SECTION_EXEC_DATA: return "exec-data";
 263     case BFD_PEF_SECTION_EXCEPTION: return "exception";
 264     case BFD_PEF_SECTION_TRACEBACK: return "traceback";
 265     default: return "unknown";
 266     }
 267 }
 268
 269 static unsigned long bfd_pef_section_flags (bfd_pef_section *section)
 270 {
 271   switch (section->section_kind)
 272     {
 273     case BFD_PEF_SECTION_CODE:
 274       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
 275     case BFD_PEF_SECTION_UNPACKED_DATA:
 276     case BFD_PEF_SECTION_PACKED_DATA:
 277     case BFD_PEF_SECTION_CONSTANT:
 278     case BFD_PEF_SECTION_LOADER:
 279     case BFD_PEF_SECTION_DEBUG:
 280     case BFD_PEF_SECTION_EXEC_DATA:
 281     case BFD_PEF_SECTION_EXCEPTION:
 282     case BFD_PEF_SECTION_TRACEBACK:
 283     default:
 284       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
 285     }
 286 }
 287
 288 static asection *
 289 bfd_pef_make_bfd_section (bfd *abfd, bfd_pef_section *section)
 290 {
 291   asection *bfdsec;
 292   const char *name = bfd_pef_section_name (section);
 293
 294   bfdsec = bfd_make_section_anyway (abfd, name);
 295   if (bfdsec == NULL)
 296     return NULL;
 297
 298   bfdsec->vma = section->default_address + section->container_offset;
 299   bfdsec->lma = section->default_address + section->container_offset;
 300   bfdsec->size = section->container_length;
 301   bfdsec->filepos = section->container_offset;
 302   bfdsec->alignment_power = section->alignment;
 303
 304   bfdsec->flags = bfd_pef_section_flags (section);
 305
 306   return bfdsec;
 307 }
 308
 309 int
 310 bfd_pef_parse_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 311                              unsigned char *buf,
 312                              size_t len,
 313                              bfd_pef_loader_header *header)
 314 {
 315   BFD_ASSERT (len == 56);
 316
 317   header->main_section = bfd_getb32 (buf);
 318   header->main_offset = bfd_getb32 (buf + 4);
 319   header->init_section = bfd_getb32 (buf + 8);
 320   header->init_offset = bfd_getb32 (buf + 12);
 321   header->term_section = bfd_getb32 (buf + 16);
 322   header->term_offset = bfd_getb32 (buf + 20);
 323   header->imported_library_count = bfd_getb32 (buf + 24);
 324   header->total_imported_symbol_count = bfd_getb32 (buf + 28);
 325   header->reloc_section_count = bfd_getb32 (buf + 32);
 326   header->reloc_instr_offset = bfd_getb32 (buf + 36);
 327   header->loader_strings_offset = bfd_getb32 (buf + 40);
 328   header->export_hash_offset = bfd_getb32 (buf + 44);
 329   header->export_hash_table_power = bfd_getb32 (buf + 48);
 330   header->exported_symbol_count = bfd_getb32 (buf + 52);
 331
 332   return 0;
 333 }
 334
 335 int
 336 bfd_pef_parse_imported_library (bfd *abfd ATTRIBUTE_UNUSED,
 337                                 unsigned char *buf,
 338                                 size_t len,
 339                                 bfd_pef_imported_library *header)
 340 {
 341   BFD_ASSERT (len == 24);
 342
 343   header->name_offset = bfd_getb32 (buf);
 344   header->old_implementation_version = bfd_getb32 (buf + 4);
 345   header->current_version = bfd_getb32 (buf + 8);
 346   header->imported_symbol_count = bfd_getb32 (buf + 12);
 347   header->first_imported_symbol = bfd_getb32 (buf + 16);
 348   header->options = buf[20];
 349   header->reserved_a = buf[21];
 350   header->reserved_b = bfd_getb16 (buf + 22);
 351
 352   return 0;
 353 }
 354
 355 int
 356 bfd_pef_parse_imported_symbol (bfd *abfd ATTRIBUTE_UNUSED,
 357                                unsigned char *buf,
 358                                size_t len,
 359                                bfd_pef_imported_symbol *symbol)
 360 {
 361   unsigned long value;
 362
 363   BFD_ASSERT (len == 4);
 364
 365   value = bfd_getb32 (buf);
 366   symbol->symbol_class = value >> 24;
 367   symbol->name = value & 0x00ffffff;
 368
 369   return 0;
 370 }
 371
 372 int
 373 bfd_pef_scan_section (bfd *abfd, bfd_pef_section *section)
 374 {
 375   unsigned char buf[28];
 376
 377   bfd_seek (abfd, section->header_offset, SEEK_SET);
 378   if (bfd_bread ((void *) buf, 28, abfd) != 28)
 379     return -1;
 380
 381   section->name_offset = bfd_h_get_32 (abfd, buf);
 382   section->default_address = bfd_h_get_32 (abfd, buf + 4);
 383   section->total_length = bfd_h_get_32 (abfd, buf + 8);
 384   section->unpacked_length = bfd_h_get_32 (abfd, buf + 12);
 385   section->container_length = bfd_h_get_32 (abfd, buf + 16);
 386   section->container_offset = bfd_h_get_32 (abfd, buf + 20);
 387   section->section_kind = buf[24];
 388   section->share_kind = buf[25];
 389   section->alignment = buf[26];
 390   section->reserved = buf[27];
 391
 392   section->bfd_section = bfd_pef_make_bfd_section (abfd, section);
 393   if (section->bfd_section == NULL)
 394     return -1;
 395
 396   return 0;
 397 }
 398
 399 void
 400 bfd_pef_print_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 401                              bfd_pef_loader_header *header,
 402                              FILE *file)
 403 {
 404   fprintf (file, "main_section: %ld\n", header->main_section);
 405   fprintf (file, "main_offset: %lu\n", header->main_offset);
 406   fprintf (file, "init_section: %ld\n", header->init_section);
 407   fprintf (file, "init_offset: %lu\n", header->init_offset);
 408   fprintf (file, "term_section: %ld\n", header->term_section);
 409   fprintf (file, "term_offset: %lu\n", header->term_offset);
 410   fprintf (file, "imported_library_count: %lu\n",
 411            header->imported_library_count);
 412   fprintf (file, "total_imported_symbol_count: %lu\n",
 413            header->total_imported_symbol_count);
 414   fprintf (file, "reloc_section_count: %lu\n", header->reloc_section_count);
 415   fprintf (file, "reloc_instr_offset: %lu\n", header->reloc_instr_offset);
 416   fprintf (file, "loader_strings_offset: %lu\n",
 417            header->loader_strings_offset);
 418   fprintf (file, "export_hash_offset: %lu\n", header->export_hash_offset);
 419   fprintf (file, "export_hash_table_power: %lu\n",
 420            header->export_hash_table_power);
 421   fprintf (file, "exported_symbol_count: %lu\n",
 422            header->exported_symbol_count);
 423 }
 424
 425 int
 426 bfd_pef_print_loader_section (bfd *abfd, FILE *file)
 427 {
 428   bfd_pef_loader_header header;
 429   asection *loadersec = NULL;
 430   unsigned char *loaderbuf = NULL;
 431   size_t loaderlen = 0;
 432
 433   loadersec = bfd_get_section_by_name (abfd, "loader");
 434   if (loadersec == NULL)
 435     return -1;
 436
 437   loaderlen = loadersec->size;
 438   loaderbuf = bfd_malloc (loaderlen);
 439
 440   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0
 441       || bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen
 442       || loaderlen < 56
 443       || bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header) < 0)
 444     {
 445       free (loaderbuf);
 446       return -1;
 447     }
 448
 449   bfd_pef_print_loader_header (abfd, &header, file);
 450   return 0;
 451 }
 452
 453 int
 454 bfd_pef_scan_start_address (bfd *abfd)
 455 {
 456   bfd_pef_loader_header header;
 457   asection *section;
 458
 459   asection *loadersec = NULL;
 460   unsigned char *loaderbuf = NULL;
 461   size_t loaderlen = 0;
 462   int ret;
 463
 464   loadersec = bfd_get_section_by_name (abfd, "loader");
 465   if (loadersec == NULL)
 466     goto end;
 467
 468   loaderlen = loadersec->size;
 469   loaderbuf = bfd_malloc (loaderlen);
 470   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
 471     goto error;
 472   if (bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen)
 473     goto error;
 474
 475   if (loaderlen < 56)
 476     goto error;
 477   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 478   if (ret < 0)
 479     goto error;
 480
 481   if (header.main_section < 0)
 482     goto end;
 483
 484   for (section = abfd->sections; section != NULL; section = section->next)
 485     if ((section->index + 1) == header.main_section)
 486       break;
 487
 488   if (section == NULL)
 489     goto error;
 490
 491   abfd->start_address = section->vma + header.main_offset;
 492
 493  end:
 494   if (loaderbuf != NULL)
 495     free (loaderbuf);
 496   return 0;
 497
 498  error:
 499   if (loaderbuf != NULL)
 500     free (loaderbuf);
 501   return -1;
 502 }
 503
 504 int
 505 bfd_pef_scan (abfd, header, mdata)
 506      bfd *abfd;
 507      bfd_pef_header *header;
 508      bfd_pef_data_struct *mdata;
 509 {
 510   unsigned int i;
 511   enum bfd_architecture cputype;
 512   unsigned long cpusubtype;
 513
 514   mdata->header = *header;
 515
 516   bfd_pef_convert_architecture (header->architecture, &cputype, &cpusubtype);
 517   if (cputype == bfd_arch_unknown)
 518     {
 519       (*_bfd_error_handler) (_("bfd_pef_scan: unknown architecture 0x%lx"),
 520                                header->architecture);
 521       return -1;
 522     }
 523   bfd_set_arch_mach (abfd, cputype, cpusubtype);
 524
 525   mdata->header = *header;
 526
 527   abfd->flags = (abfd->xvec->object_flags
 528                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
 529
 530   if (header->section_count != 0)
 531     {
 532       mdata->sections = bfd_alloc (abfd, header->section_count * sizeof (bfd_pef_section));
 533
 534       if (mdata->sections == NULL)
 535         return -1;
 536
 537       for (i = 0; i < header->section_count; i++)
 538         {
 539           bfd_pef_section *cur = &mdata->sections[i];
 540           cur->header_offset = 40 + (i * 28);
 541           if (bfd_pef_scan_section (abfd, cur) < 0)
 542             return -1;
 543         }
 544     }
 545
 546   if (bfd_pef_scan_start_address (abfd) < 0)
 547     return -1;
 548
 549   abfd->tdata.pef_data = mdata;
 550
 551   return 0;
 552 }
 553
 554 static int
 555 bfd_pef_read_header (bfd *abfd, bfd_pef_header *header)
 556 {
 557   unsigned char buf[40];
 558
 559   bfd_seek (abfd, 0, SEEK_SET);
 560
 561   if (bfd_bread ((void *) buf, 40, abfd) != 40)
 562     return -1;
 563
 564   header->tag1 = bfd_getb32 (buf);
 565   header->tag2 = bfd_getb32 (buf + 4);
 566   header->architecture = bfd_getb32 (buf + 8);
 567   header->format_version = bfd_getb32 (buf + 12);
 568   header->timestamp = bfd_getb32 (buf + 16);
 569   header->old_definition_version = bfd_getb32 (buf + 20);
 570   header->old_implementation_version = bfd_getb32 (buf + 24);
 571   header->current_version = bfd_getb32 (buf + 28);
 572   header->section_count = bfd_getb32 (buf + 32) + 1;
 573   header->instantiated_section_count = bfd_getb32 (buf + 34);
 574   header->reserved = bfd_getb32 (buf + 36);
 575
 576   return 0;
 577 }
 578
 579 static const bfd_target *
 580 bfd_pef_object_p (bfd *abfd)
 581 {
 582   struct bfd_preserve preserve;
 583   bfd_pef_header header;
 584
 585   preserve.marker = NULL;
 586   if (bfd_pef_read_header (abfd, &header) != 0)
 587     goto wrong;
 588
 589   if (header.tag1 != BFD_PEF_TAG1 || header.tag2 != BFD_PEF_TAG2)
 590     goto wrong;
 591
 592   preserve.marker = bfd_zalloc (abfd, sizeof (bfd_pef_data_struct));
 593   if (preserve.marker == NULL
 594       || !bfd_preserve_save (abfd, &preserve))
 595     goto fail;
 596
 597   if (bfd_pef_scan (abfd, &header,
 598                     (bfd_pef_data_struct *) preserve.marker) != 0)
 599     goto wrong;
 600
 601   bfd_preserve_finish (abfd, &preserve);
 602   return abfd->xvec;
 603
 604  wrong:
 605   bfd_set_error (bfd_error_wrong_format);
 606
 607  fail:
 608   if (preserve.marker != NULL)
 609     bfd_preserve_restore (abfd, &preserve);
 610   return NULL;
 611 }
 612
 613 static int
 614 bfd_pef_parse_traceback_tables (bfd *abfd,
 615                                 asection *sec,
 616                                 unsigned char *buf,
 617                                 size_t len,
 618                                 long *nsym,
 619                                 asymbol **csym)
 620 {
 621   char *name;
 622
 623   asymbol function;
 624   asymbol traceback;
 625
 626   const char *const tbprefix = "__traceback_";
 627   size_t tbnamelen;
 628
 629   size_t pos = 0;
 630   unsigned long count = 0;
 631   int ret;
 632
 633   for (;;)
 634     {
 635       /* We're reading symbols two at a time.  */
 636       if (csym && ((csym[count] == NULL) || (csym[count + 1] == NULL)))
 637         break;
 638
 639       pos += 3;
 640       pos -= (pos % 4);
 641
 642       while ((pos + 4) <= len)
 643         {
 644           if (bfd_getb32 (buf + pos) == 0)
 645             break;
 646           pos += 4;
 647         }
 648
 649       if ((pos + 4) > len)
 650         break;
 651
 652       ret = bfd_pef_parse_traceback_table (abfd, sec, buf, len, pos + 4,
 653                                            &function, 0);
 654       if (ret < 0)
 655         {
 656           /* Skip over 0x0L to advance to next possible traceback table.  */
 657           pos += 4;
 658           continue;
 659         }
 660
 661       BFD_ASSERT (function.name != NULL);
 662
 663       /* Don't bother to compute the name if we are just
 664          counting symbols.  */
 665       if (csym)
 666         {
 667           tbnamelen = strlen (tbprefix) + strlen (function.name);
 668           name = bfd_alloc (abfd, tbnamelen + 1);
 669           if (name == NULL)
 670             {
 671               bfd_release (abfd, (void *) function.name);
 672               function.name = NULL;
 673               break;
 674             }
 675           snprintf (name, tbnamelen + 1, "%s%s", tbprefix, function.name);
 676           traceback.name = name;
 677           traceback.value = pos;
 678           traceback.the_bfd = abfd;
 679           traceback.section = sec;
 680           traceback.flags = 0;
 681           traceback.udata.i = ret;
 682
 683           *(csym[count]) = function;
 684           *(csym[count + 1]) = traceback;
 685         }
 686
 687       pos += ret;
 688       count += 2;
 689     }
 690
 691   *nsym = count;
 692   return 0;
 693 }
 694
 695 static int
 696 bfd_pef_parse_function_stub (bfd *abfd ATTRIBUTE_UNUSED,
 697                              unsigned char *buf,
 698                              size_t len,
 699                              unsigned long *offset)
 700 {
 701   BFD_ASSERT (len == 24);
 702
 703   if ((bfd_getb32 (buf) & 0xffff0000) != 0x81820000)
 704     return -1;
 705   if (bfd_getb32 (buf + 4) != 0x90410014)
 706     return -1;
 707   if (bfd_getb32 (buf + 8) != 0x800c0000)
 708     return -1;
 709   if (bfd_getb32 (buf + 12) != 0x804c0004)
 710     return -1;
 711   if (bfd_getb32 (buf + 16) != 0x7c0903a6)
 712     return -1;
 713   if (bfd_getb32 (buf + 20) != 0x4e800420)
 714     return -1;
 715
 716   if (offset != NULL)
 717     *offset = (bfd_getb32 (buf) & 0x0000ffff) / 4;
 718
 719   return 0;
 720 }
 721
 722 static int
 723 bfd_pef_parse_function_stubs (bfd *abfd,
 724                               asection *codesec,
 725                               unsigned char *codebuf,
 726                               size_t codelen,
 727                               unsigned char *loaderbuf,
 728                               size_t loaderlen,
 729                               unsigned long *nsym,
 730                               asymbol **csym)
 731 {
 732   const char *const sprefix = "__stub_";
 733   size_t codepos = 0;
 734   unsigned long count = 0;
 735   bfd_pef_loader_header header;
 736   bfd_pef_imported_library *libraries = NULL;
 737   bfd_pef_imported_symbol *imports = NULL;
 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 sym_index;
 784
 785       if (csym && (csym[count] == NULL))
 786         break;
 787
 788       codepos += 3;
 789       codepos -= (codepos % 4);
 790
 791       while ((codepos + 4) <= codelen)
 792         {
 793           if ((bfd_getb32 (codebuf + codepos) & 0xffff0000) == 0x81820000)
 794             break;
 795           codepos += 4;
 796         }
 797
 798       if ((codepos + 4) > codelen)
 799         break;
 800
 801       ret = bfd_pef_parse_function_stub (abfd, codebuf + codepos, 24, &sym_index);
 802       if (ret < 0)
 803         {
 804           codepos += 24;
 805           continue;
 806         }
 807
 808       if (sym_index >= header.total_imported_symbol_count)
 809         {
 810           codepos += 24;
 811           continue;
 812         }
 813
 814       {
 815         size_t max, namelen;
 816         const char *s;
 817
 818         if (loaderlen < (header.loader_strings_offset + imports[sym_index].name))
 819           goto error;
 820
 821         max = loaderlen - (header.loader_strings_offset + imports[sym_index].name);
 822         symname = (char *) loaderbuf;
 823         symname += header.loader_strings_offset + imports[sym_index].name;
 824         namelen = 0;
 825         for (s = symname; s < (symname + max); s++)
 826           {
 827             if (*s == '\0')
 828               break;
 829             if (! ISPRINT (*s))
 830               goto error;
 831             namelen++;
 832           }
 833         if (*s != '\0')
 834           goto error;
 835
 836         name = bfd_alloc (abfd, strlen (sprefix) + namelen + 1);
 837         if (name == NULL)
 838           break;
 839
 840         snprintf (name, strlen (sprefix) + namelen + 1, "%s%s",
 841                   sprefix, symname);
 842         sym.name = name;
 843       }
 844
 845       sym.value = codepos;
 846       sym.the_bfd = abfd;
 847       sym.section = codesec;
 848       sym.flags = 0;
 849       sym.udata.i = 0;
 850
 851       codepos += 24;
 852
 853       if (csym != NULL)
 854         *(csym[count]) = sym;
 855
 856       count++;
 857     }
 858
 859   goto end;
 860
 861  end:
 862   if (libraries != NULL)
 863     free (libraries);
 864   if (imports != NULL)
 865     free (imports);
 866   *nsym = count;
 867   return 0;
 868
 869  error:
 870   if (libraries != NULL)
 871     free (libraries);
 872   if (imports != NULL)
 873     free (imports);
 874   *nsym = count;
 875   return -1;
 876 }
 877
 878 static long
 879 bfd_pef_parse_symbols (bfd *abfd, asymbol **csym)
 880 {
 881   unsigned long count = 0;
 882
 883   asection *codesec = NULL;
 884   unsigned char *codebuf = NULL;
 885   size_t codelen = 0;
 886
 887   asection *loadersec = NULL;
 888   unsigned char *loaderbuf = NULL;
 889   size_t loaderlen = 0;
 890
 891   codesec = bfd_get_section_by_name (abfd, "code");
 892   if (codesec != NULL)
 893     {
 894       codelen = codesec->size;
 895       codebuf = bfd_malloc (codelen);
 896       if (bfd_seek (abfd, codesec->filepos, SEEK_SET) < 0)
 897         goto end;
 898       if (bfd_bread ((void *) codebuf, codelen, abfd) != codelen)
 899         goto end;
 900     }
 901
 902   loadersec = bfd_get_section_by_name (abfd, "loader");
 903   if (loadersec != NULL)
 904     {
 905       loaderlen = loadersec->size;
 906       loaderbuf = bfd_malloc (loaderlen);
 907       if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
 908         goto end;
 909       if (bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen)
 910         goto end;
 911     }
 912
 913   count = 0;
 914   if (codesec != NULL)
 915     {
 916       long ncount = 0;
 917       bfd_pef_parse_traceback_tables (abfd, codesec, codebuf, codelen,
 918                                       &ncount, csym);
 919       count += ncount;
 920     }
 921
 922   if ((codesec != NULL) && (loadersec != NULL))
 923     {
 924       unsigned long ncount = 0;
 925       bfd_pef_parse_function_stubs
 926         (abfd, codesec, codebuf, codelen, loaderbuf, loaderlen, &ncount,
 927          (csym != NULL) ? (csym + count) : NULL);
 928       count += ncount;
 929     }
 930
 931   if (csym != NULL)
 932     csym[count] = NULL;
 933
 934  end:
 935   if (codebuf != NULL)
 936     free (codebuf);
 937
 938   if (loaderbuf != NULL)
 939     free (loaderbuf);
 940
 941   return count;
 942 }
 943
 944 static long
 945 bfd_pef_count_symbols (bfd *abfd)
 946 {
 947   return bfd_pef_parse_symbols (abfd, NULL);
 948 }
 949
 950 static long
 951 bfd_pef_get_symtab_upper_bound (bfd *abfd)
 952 {
 953   long nsyms = bfd_pef_count_symbols (abfd);
 954
 955   if (nsyms < 0)
 956     return nsyms;
 957   return ((nsyms + 1) * sizeof (asymbol *));
 958 }
 959
 960 static long
 961 bfd_pef_canonicalize_symtab (bfd *abfd, asymbol **alocation)
 962 {
 963   long i;
 964   asymbol *syms;
 965   long ret;
 966   long nsyms = bfd_pef_count_symbols (abfd);
 967
 968   if (nsyms < 0)
 969     return nsyms;
 970
 971   syms = bfd_alloc (abfd, nsyms * sizeof (asymbol));
 972   if (syms == NULL)
 973     return -1;
 974
 975   for (i = 0; i < nsyms; i++)
 976     alocation[i] = &syms[i];
 977
 978   alocation[nsyms] = NULL;
 979
 980   ret = bfd_pef_parse_symbols (abfd, alocation);
 981   if (ret != nsyms)
 982     return 0;
 983
 984   return ret;
 985 }
 986
 987 #define bfd_pef_make_empty_symbol _bfd_generic_make_empty_symbol
 988
 989 static void
 990 bfd_pef_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
 991                          asymbol *symbol,
 992                          symbol_info *ret)
 993 {
 994   bfd_symbol_info (symbol, ret);
 995 }
 996
 997 static int
 998 bfd_pef_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
 999                         struct bfd_link_info *info ATTRIBUTE_UNUSED)
1000 {
1001   return 0;
1002 }
1003
1004 const bfd_target pef_vec =
1005 {
1006   "pef",                        /* Name.  */
1007   bfd_target_pef_flavour,       /* Flavour.  */
1008   BFD_ENDIAN_BIG,               /* Byteorder.  */
1009   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1010   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1011    HAS_LINENO | HAS_DEBUG |
1012    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1013   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1014    | SEC_ROM | SEC_HAS_CONTENTS), /* Section_flags.  */
1015   0,                            /* Symbol_leading_char.  */
1016   ' ',                          /* AR_pad_char.  */
1017   16,                           /* AR_max_namelen.  */
1018   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1019   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1020   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1021   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1022   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1023   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1024   {                             /* bfd_check_format.  */
1025     _bfd_dummy_target,
1026     bfd_pef_object_p,           /* bfd_check_format.  */
1027     _bfd_dummy_target,
1028     _bfd_dummy_target,
1029   },
1030   {                             /* bfd_set_format.  */
1031     bfd_false,
1032     bfd_pef_mkobject,
1033     bfd_false,
1034     bfd_false,
1035   },
1036   {                             /* bfd_write_contents.  */
1037     bfd_false,
1038     bfd_true,
1039     bfd_false,
1040     bfd_false,
1041   },
1042
1043   BFD_JUMP_TABLE_GENERIC (bfd_pef),
1044   BFD_JUMP_TABLE_COPY (_bfd_generic),
1045   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1046   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1047   BFD_JUMP_TABLE_SYMBOLS (bfd_pef),
1048   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1049   BFD_JUMP_TABLE_WRITE (bfd_pef),
1050   BFD_JUMP_TABLE_LINK (bfd_pef),
1051   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1052
1053   NULL,
1054
1055   NULL
1056 };
1057
1058 #define bfd_pef_xlib_close_and_cleanup              _bfd_generic_close_and_cleanup
1059 #define bfd_pef_xlib_bfd_free_cached_info           _bfd_generic_bfd_free_cached_info
1060 #define bfd_pef_xlib_new_section_hook               _bfd_generic_new_section_hook
1061 #define bfd_pef_xlib_get_section_contents           _bfd_generic_get_section_contents
1062 #define bfd_pef_xlib_set_section_contents           _bfd_generic_set_section_contents
1063 #define bfd_pef_xlib_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
1064 #define bfd_pef_xlib_set_section_contents_in_window _bfd_generic_set_section_contents_in_window
1065
1066 static int
1067 bfd_pef_xlib_read_header (bfd *abfd, bfd_pef_xlib_header *header)
1068 {
1069   unsigned char buf[76];
1070
1071   bfd_seek (abfd, 0, SEEK_SET);
1072
1073   if (bfd_bread ((void *) buf, 76, abfd) != 76)
1074     return -1;
1075
1076   header->tag1 = bfd_getb32 (buf);
1077   header->tag2 = bfd_getb32 (buf + 4);
1078   header->current_format = bfd_getb32 (buf + 8);
1079   header->container_strings_offset = bfd_getb32 (buf + 12);
1080   header->export_hash_offset = bfd_getb32 (buf + 16);
1081   header->export_key_offset = bfd_getb32 (buf + 20);
1082   header->export_symbol_offset = bfd_getb32 (buf + 24);
1083   header->export_names_offset = bfd_getb32 (buf + 28);
1084   header->export_hash_table_power = bfd_getb32 (buf + 32);
1085   header->exported_symbol_count = bfd_getb32 (buf + 36);
1086   header->frag_name_offset = bfd_getb32 (buf + 40);
1087   header->frag_name_length = bfd_getb32 (buf + 44);
1088   header->dylib_path_offset = bfd_getb32 (buf + 48);
1089   header->dylib_path_length = bfd_getb32 (buf + 52);
1090   header->cpu_family = bfd_getb32 (buf + 56);
1091   header->cpu_model = bfd_getb32 (buf + 60);
1092   header->date_time_stamp = bfd_getb32 (buf + 64);
1093   header->current_version = bfd_getb32 (buf + 68);
1094   header->old_definition_version = bfd_getb32 (buf + 72);
1095   header->old_implementation_version = bfd_getb32 (buf + 76);
1096
1097   return 0;
1098 }
1099
1100 static int
1101 bfd_pef_xlib_scan (bfd *abfd, bfd_pef_xlib_header *header)
1102 {
1103   bfd_pef_xlib_data_struct *mdata = NULL;
1104
1105   mdata = bfd_alloc (abfd, sizeof (* mdata));
1106   if (mdata == NULL)
1107     return -1;
1108
1109   mdata->header = *header;
1110
1111   abfd->flags = (abfd->xvec->object_flags
1112                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
1113
1114   abfd->tdata.pef_xlib_data = mdata;
1115
1116   return 0;
1117 }
1118
1119 static const bfd_target *
1120 bfd_pef_xlib_object_p (bfd *abfd)
1121 {
1122   struct bfd_preserve preserve;
1123   bfd_pef_xlib_header header;
1124
1125   if (bfd_pef_xlib_read_header (abfd, &header) != 0)
1126     {
1127       bfd_set_error (bfd_error_wrong_format);
1128       return NULL;
1129     }
1130
1131   if ((header.tag1 != BFD_PEF_XLIB_TAG1)
1132       || ((header.tag2 != BFD_PEF_VLIB_TAG2)
1133           && (header.tag2 != BFD_PEF_BLIB_TAG2)))
1134     {
1135       bfd_set_error (bfd_error_wrong_format);
1136       return NULL;
1137     }
1138
1139   if (! bfd_preserve_save (abfd, &preserve))
1140     {
1141       bfd_set_error (bfd_error_wrong_format);
1142       return NULL;
1143     }
1144
1145   if (bfd_pef_xlib_scan (abfd, &header) != 0)
1146     {
1147       bfd_preserve_restore (abfd, &preserve);
1148       bfd_set_error (bfd_error_wrong_format);
1149       return NULL;
1150     }
1151
1152   bfd_preserve_finish (abfd, &preserve);
1153   return abfd->xvec;
1154 }
1155
1156 const bfd_target pef_xlib_vec =
1157 {
1158   "pef-xlib",                   /* Name.  */
1159   bfd_target_pef_xlib_flavour,  /* Flavour.  */
1160   BFD_ENDIAN_BIG,               /* Byteorder */
1161   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1162   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1163    HAS_LINENO | HAS_DEBUG |
1164    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1165   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1166    | SEC_ROM | SEC_HAS_CONTENTS),/* Section_flags.  */
1167   0,                            /* Symbol_leading_char.  */
1168   ' ',                          /* AR_pad_char.  */
1169   16,                           /* AR_max_namelen.  */
1170   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1171   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1172   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1173   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1174   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1175   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1176   {                             /* bfd_check_format.  */
1177     _bfd_dummy_target,
1178     bfd_pef_xlib_object_p,      /* bfd_check_format.  */
1179     _bfd_dummy_target,
1180     _bfd_dummy_target,
1181   },
1182   {                             /* bfd_set_format.  */
1183     bfd_false,
1184     bfd_pef_mkobject,
1185     bfd_false,
1186     bfd_false,
1187   },
1188   {                             /* bfd_write_contents.  */
1189     bfd_false,
1190     bfd_true,
1191     bfd_false,
1192     bfd_false,
1193   },
1194
1195   BFD_JUMP_TABLE_GENERIC (bfd_pef_xlib),
1196   BFD_JUMP_TABLE_COPY (_bfd_generic),
1197   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1198   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1199   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
1200   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1201   BFD_JUMP_TABLE_WRITE (_bfd_nowrite),
1202   BFD_JUMP_TABLE_LINK (_bfd_nolink),
1203   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1204
1205   NULL,
1206
1207   NULL
1208 };