bfd/pef.c

   1 /* PEF support for BFD.
   2    Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
   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 2 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, MA 02110-1301, USA.  */
  20
  21 #include "safe-ctype.h"
  22 #include "pef.h"
  23 #include "pef-traceback.h"
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "libbfd.h"
  27 #include "libiberty.h"
  28
  29 #ifndef BFD_IO_FUNCS
  30 #define BFD_IO_FUNCS 0
  31 #endif
  32
  33 #define bfd_pef_close_and_cleanup                   _bfd_generic_close_and_cleanup
  34 #define bfd_pef_bfd_free_cached_info                _bfd_generic_bfd_free_cached_info
  35 #define bfd_pef_new_section_hook                    _bfd_generic_new_section_hook
  36 #define bfd_pef_bfd_is_local_label_name             bfd_generic_is_local_label_name
  37 #define bfd_pef_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
  38 #define bfd_pef_get_lineno                          _bfd_nosymbols_get_lineno
  39 #define bfd_pef_find_nearest_line                   _bfd_nosymbols_find_nearest_line
  40 #define bfd_pef_find_inliner_info                   _bfd_nosymbols_find_inliner_info
  41 #define bfd_pef_bfd_make_debug_symbol               _bfd_nosymbols_bfd_make_debug_symbol
  42 #define bfd_pef_read_minisymbols                    _bfd_generic_read_minisymbols
  43 #define bfd_pef_minisymbol_to_symbol                _bfd_generic_minisymbol_to_symbol
  44 #define bfd_pef_get_reloc_upper_bound               _bfd_norelocs_get_reloc_upper_bound
  45 #define bfd_pef_canonicalize_reloc                  _bfd_norelocs_canonicalize_reloc
  46 #define bfd_pef_bfd_reloc_type_lookup               _bfd_norelocs_bfd_reloc_type_lookup
  47 #define bfd_pef_set_arch_mach                       _bfd_generic_set_arch_mach
  48 #define bfd_pef_get_section_contents                _bfd_generic_get_section_contents
  49 #define bfd_pef_set_section_contents                _bfd_generic_set_section_contents
  50 #define bfd_pef_bfd_get_relocated_section_contents  bfd_generic_get_relocated_section_contents
  51 #define bfd_pef_bfd_relax_section                   bfd_generic_relax_section
  52 #define bfd_pef_bfd_gc_sections                     bfd_generic_gc_sections
  53 #define bfd_pef_bfd_merge_sections                  bfd_generic_merge_sections
  54 #define bfd_pef_bfd_is_group_section                bfd_generic_is_group_section
  55 #define bfd_pef_bfd_discard_group                   bfd_generic_discard_group
  56 #define bfd_pef_section_already_linked              _bfd_generic_section_already_linked
  57 #define bfd_pef_bfd_link_hash_table_create          _bfd_generic_link_hash_table_create
  58 #define bfd_pef_bfd_link_hash_table_free            _bfd_generic_link_hash_table_free
  59 #define bfd_pef_bfd_link_add_symbols                _bfd_generic_link_add_symbols
  60 #define bfd_pef_bfd_link_just_syms                  _bfd_generic_link_just_syms
  61 #define bfd_pef_bfd_final_link                      _bfd_generic_final_link
  62 #define bfd_pef_bfd_link_split_section              _bfd_generic_link_split_section
  63 #define bfd_pef_get_section_contents_in_window      _bfd_generic_get_section_contents_in_window
  64
  65 static int
  66 bfd_pef_parse_traceback_table (bfd *abfd,
  67                                asection *section,
  68                                unsigned char *buf,
  69                                size_t len,
  70                                size_t pos,
  71                                asymbol *sym,
  72                                FILE *file)
  73 {
  74   struct traceback_table table;
  75   size_t offset;
  76   const char *s;
  77   asymbol tmpsymbol;
  78
  79   if (sym == NULL)
  80     sym = & tmpsymbol;
  81
  82   sym->name = NULL;
  83   sym->value = 0;
  84   sym->the_bfd = abfd;
  85   sym->section = section;
  86   sym->flags = 0;
  87   sym->udata.i = 0;
  88
  89   /* memcpy is fine since all fields are unsigned char.  */
  90   if ((pos + 8) > len)
  91     return -1;
  92   memcpy (&table, buf + pos, 8);
  93
  94   /* Calling code relies on returned symbols having a name and
  95      correct offset.  */
  96   if ((table.lang != TB_C) && (table.lang != TB_CPLUSPLUS))
  97     return -1;
  98
  99   if (! (table.flags2 & TB_NAME_PRESENT))
 100     return -1;
 101
 102   if (! table.flags1 & TB_HAS_TBOFF)
 103     return -1;
 104
 105   offset = 8;
 106
 107   if ((table.flags5 & TB_FLOATPARAMS) || (table.fixedparams))
 108     offset += 4;
 109
 110   if (table.flags1 & TB_HAS_TBOFF)
 111     {
 112       struct traceback_table_tboff off;
 113
 114       if ((pos + offset + 4) > len)
 115         return -1;
 116       off.tb_offset = bfd_getb32 (buf + pos + offset);
 117       offset += 4;
 118
 119       /* Need to subtract 4 because the offset includes the 0x0L
 120          preceding the table.  */
 121       if (file != NULL)
 122         fprintf (file, " [offset = 0x%lx]", off.tb_offset);
 123
 124       if ((file == NULL) && ((off.tb_offset + 4) > (pos + offset)))
 125         return -1;
 126
 127       sym->value = pos - off.tb_offset - 4;
 128     }
 129
 130   if (table.flags2 & TB_INT_HNDL)
 131     offset += 4;
 132
 133   if (table.flags1 & TB_HAS_CTL)
 134     {
 135       struct traceback_table_anchors anchors;
 136
 137       if ((pos + offset + 4) > len)
 138         return -1;
 139       anchors.ctl_info = bfd_getb32 (buf + pos + offset);
 140       offset += 4;
 141
 142       if (anchors.ctl_info > 1024)
 143         return -1;
 144
 145       offset += anchors.ctl_info * 4;
 146     }
 147
 148   if (table.flags2 & TB_NAME_PRESENT)
 149     {
 150       struct traceback_table_routine name;
 151       char *namebuf;
 152
 153       if ((pos + offset + 2) > len)
 154         return -1;
 155       name.name_len = bfd_getb16 (buf + pos + offset);
 156       offset += 2;
 157
 158       if (name.name_len > 4096)
 159         return -1;
 160
 161       if ((pos + offset + name.name_len) > len)
 162         return -1;
 163
 164       namebuf = bfd_alloc (abfd, name.name_len + 1);
 165       if (namebuf == NULL)
 166         return -1;
 167
 168       memcpy (namebuf, buf + pos + offset, name.name_len);
 169       namebuf[name.name_len] = '\0';
 170
 171       /* Strip leading period inserted by compiler.  */
 172       if (namebuf[0] == '.')
 173         memmove (namebuf, namebuf + 1, name.name_len + 1);
 174
 175       sym->name = namebuf;
 176
 177       for (s = sym->name; (*s != '\0'); s++)
 178         if (! ISPRINT (*s))
 179           return -1;
 180
 181       offset += name.name_len;
 182     }
 183
 184   if (table.flags2 & TB_USES_ALLOCA)
 185     offset += 4;
 186
 187   if (table.flags4 & TB_HAS_VEC_INFO)
 188     offset += 4;
 189
 190   if (file != NULL)
 191     fprintf (file, " [length = 0x%lx]", (long) offset);
 192
 193   return offset;
 194 }
 195
 196 static void
 197 bfd_pef_print_symbol (bfd *abfd,
 198                       void * afile,
 199                       asymbol *symbol,
 200                       bfd_print_symbol_type how)
 201 {
 202   FILE *file = (FILE *) afile;
 203
 204   switch (how)
 205     {
 206     case bfd_print_symbol_name:
 207       fprintf (file, "%s", symbol->name);
 208       break;
 209     default:
 210       bfd_print_symbol_vandf (abfd, (void *) file, symbol);
 211       fprintf (file, " %-5s %s", symbol->section->name, symbol->name);
 212       if (strncmp (symbol->name, "__traceback_", strlen ("__traceback_")) == 0)
 213         {
 214           unsigned char *buf = alloca (symbol->udata.i);
 215           size_t offset = symbol->value + 4;
 216           size_t len = symbol->udata.i;
 217           int ret;
 218
 219           bfd_get_section_contents (abfd, symbol->section, buf, offset, len);
 220           ret = bfd_pef_parse_traceback_table (abfd, symbol->section, buf,
 221                                                len, 0, NULL, file);
 222           if (ret < 0)
 223             fprintf (file, " [ERROR]");
 224         }
 225     }
 226 }
 227
 228 static void
 229 bfd_pef_convert_architecture (unsigned long architecture,
 230                               enum bfd_architecture *type,
 231                               unsigned long *subtype)
 232 {
 233   const unsigned long ARCH_POWERPC = 0x70777063; /* 'pwpc'.  */
 234   const unsigned long ARCH_M68K = 0x6d36386b; /* 'm68k'.  */
 235
 236   *subtype = bfd_arch_unknown;
 237   *type = bfd_arch_unknown;
 238
 239   if (architecture == ARCH_POWERPC)
 240     *type = bfd_arch_powerpc;
 241   else if (architecture == ARCH_M68K)
 242     *type = bfd_arch_m68k;
 243 }
 244
 245 static bfd_boolean
 246 bfd_pef_mkobject (bfd *abfd ATTRIBUTE_UNUSED)
 247 {
 248   return TRUE;
 249 }
 250
 251 static const char *bfd_pef_section_name (bfd_pef_section *section)
 252 {
 253   switch (section->section_kind)
 254     {
 255     case BFD_PEF_SECTION_CODE: return "code";
 256     case BFD_PEF_SECTION_UNPACKED_DATA: return "unpacked-data";
 257     case BFD_PEF_SECTION_PACKED_DATA: return "packed-data";
 258     case BFD_PEF_SECTION_CONSTANT: return "constant";
 259     case BFD_PEF_SECTION_LOADER: return "loader";
 260     case BFD_PEF_SECTION_DEBUG: return "debug";
 261     case BFD_PEF_SECTION_EXEC_DATA: return "exec-data";
 262     case BFD_PEF_SECTION_EXCEPTION: return "exception";
 263     case BFD_PEF_SECTION_TRACEBACK: return "traceback";
 264     default: return "unknown";
 265     }
 266 }
 267
 268 static unsigned long bfd_pef_section_flags (bfd_pef_section *section)
 269 {
 270   switch (section->section_kind)
 271     {
 272     case BFD_PEF_SECTION_CODE:
 273       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
 274     case BFD_PEF_SECTION_UNPACKED_DATA:
 275     case BFD_PEF_SECTION_PACKED_DATA:
 276     case BFD_PEF_SECTION_CONSTANT:
 277     case BFD_PEF_SECTION_LOADER:
 278     case BFD_PEF_SECTION_DEBUG:
 279     case BFD_PEF_SECTION_EXEC_DATA:
 280     case BFD_PEF_SECTION_EXCEPTION:
 281     case BFD_PEF_SECTION_TRACEBACK:
 282     default:
 283       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
 284     }
 285 }
 286
 287 static asection *
 288 bfd_pef_make_bfd_section (bfd *abfd, bfd_pef_section *section)
 289 {
 290   asection *bfdsec;
 291   const char *name = bfd_pef_section_name (section);
 292
 293   bfdsec = bfd_make_section_anyway (abfd, name);
 294   if (bfdsec == NULL)
 295     return NULL;
 296
 297   bfdsec->vma = section->default_address + section->container_offset;
 298   bfdsec->lma = section->default_address + section->container_offset;
 299   bfdsec->size = section->container_length;
 300   bfdsec->filepos = section->container_offset;
 301   bfdsec->alignment_power = section->alignment;
 302
 303   bfdsec->flags = bfd_pef_section_flags (section);
 304
 305   return bfdsec;
 306 }
 307
 308 int
 309 bfd_pef_parse_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 310                              unsigned char *buf,
 311                              size_t len,
 312                              bfd_pef_loader_header *header)
 313 {
 314   BFD_ASSERT (len == 56);
 315
 316   header->main_section = bfd_getb32 (buf);
 317   header->main_offset = bfd_getb32 (buf + 4);
 318   header->init_section = bfd_getb32 (buf + 8);
 319   header->init_offset = bfd_getb32 (buf + 12);
 320   header->term_section = bfd_getb32 (buf + 16);
 321   header->term_offset = bfd_getb32 (buf + 20);
 322   header->imported_library_count = bfd_getb32 (buf + 24);
 323   header->total_imported_symbol_count = bfd_getb32 (buf + 28);
 324   header->reloc_section_count = bfd_getb32 (buf + 32);
 325   header->reloc_instr_offset = bfd_getb32 (buf + 36);
 326   header->loader_strings_offset = bfd_getb32 (buf + 40);
 327   header->export_hash_offset = bfd_getb32 (buf + 44);
 328   header->export_hash_table_power = bfd_getb32 (buf + 48);
 329   header->exported_symbol_count = bfd_getb32 (buf + 52);
 330
 331   return 0;
 332 }
 333
 334 int
 335 bfd_pef_parse_imported_library (bfd *abfd ATTRIBUTE_UNUSED,
 336                                 unsigned char *buf,
 337                                 size_t len,
 338                                 bfd_pef_imported_library *header)
 339 {
 340   BFD_ASSERT (len == 24);
 341
 342   header->name_offset = bfd_getb32 (buf);
 343   header->old_implementation_version = bfd_getb32 (buf + 4);
 344   header->current_version = bfd_getb32 (buf + 8);
 345   header->imported_symbol_count = bfd_getb32 (buf + 12);
 346   header->first_imported_symbol = bfd_getb32 (buf + 16);
 347   header->options = buf[20];
 348   header->reserved_a = buf[21];
 349   header->reserved_b = bfd_getb16 (buf + 22);
 350
 351   return 0;
 352 }
 353
 354 int
 355 bfd_pef_parse_imported_symbol (bfd *abfd ATTRIBUTE_UNUSED,
 356                                unsigned char *buf,
 357                                size_t len,
 358                                bfd_pef_imported_symbol *symbol)
 359 {
 360   unsigned long value;
 361
 362   BFD_ASSERT (len == 4);
 363
 364   value = bfd_getb32 (buf);
 365   symbol->class = value >> 24;
 366   symbol->name = value & 0x00ffffff;
 367
 368   return 0;
 369 }
 370
 371 int
 372 bfd_pef_scan_section (bfd *abfd, bfd_pef_section *section)
 373 {
 374   unsigned char buf[28];
 375
 376   bfd_seek (abfd, section->header_offset, SEEK_SET);
 377   if (bfd_bread ((void *) buf, 28, abfd) != 28)
 378     return -1;
 379
 380   section->name_offset = bfd_h_get_32 (abfd, buf);
 381   section->default_address = bfd_h_get_32 (abfd, buf + 4);
 382   section->total_length = bfd_h_get_32 (abfd, buf + 8);
 383   section->unpacked_length = bfd_h_get_32 (abfd, buf + 12);
 384   section->container_length = bfd_h_get_32 (abfd, buf + 16);
 385   section->container_offset = bfd_h_get_32 (abfd, buf + 20);
 386   section->section_kind = buf[24];
 387   section->share_kind = buf[25];
 388   section->alignment = buf[26];
 389   section->reserved = buf[27];
 390
 391   section->bfd_section = bfd_pef_make_bfd_section (abfd, section);
 392   if (section->bfd_section == NULL)
 393     return -1;
 394
 395   return 0;
 396 }
 397
 398 void
 399 bfd_pef_print_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 400                              bfd_pef_loader_header *header,
 401                              FILE *file)
 402 {
 403   fprintf (file, "main_section: %ld\n", header->main_section);
 404   fprintf (file, "main_offset: %lu\n", header->main_offset);
 405   fprintf (file, "init_section: %ld\n", header->init_section);
 406   fprintf (file, "init_offset: %lu\n", header->init_offset);
 407   fprintf (file, "term_section: %ld\n", header->term_section);
 408   fprintf (file, "term_offset: %lu\n", header->term_offset);
 409   fprintf (file, "imported_library_count: %lu\n",
 410            header->imported_library_count);
 411   fprintf (file, "total_imported_symbol_count: %lu\n",
 412            header->total_imported_symbol_count);
 413   fprintf (file, "reloc_section_count: %lu\n", header->reloc_section_count);
 414   fprintf (file, "reloc_instr_offset: %lu\n", header->reloc_instr_offset);
 415   fprintf (file, "loader_strings_offset: %lu\n",
 416            header->loader_strings_offset);
 417   fprintf (file, "export_hash_offset: %lu\n", header->export_hash_offset);
 418   fprintf (file, "export_hash_table_power: %lu\n",
 419            header->export_hash_table_power);
 420   fprintf (file, "exported_symbol_count: %lu\n",
 421            header->exported_symbol_count);
 422 }
 423
 424 int
 425 bfd_pef_print_loader_section (bfd *abfd, FILE *file)
 426 {
 427   bfd_pef_loader_header header;
 428   asection *loadersec = NULL;
 429   unsigned char *loaderbuf = NULL;
 430   size_t loaderlen = 0;
 431
 432   loadersec = bfd_get_section_by_name (abfd, "loader");
 433   if (loadersec == NULL)
 434     return -1;
 435
 436   loaderlen = loadersec->size;
 437   loaderbuf = bfd_malloc (loaderlen);
 438
 439   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0
 440       || bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen
 441       || loaderlen < 56
 442       || bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header) < 0)
 443     {
 444       free (loaderbuf);
 445       return -1;
 446     }
 447
 448   bfd_pef_print_loader_header (abfd, &header, file);
 449   return 0;
 450 }
 451
 452 int
 453 bfd_pef_scan_start_address (bfd *abfd)
 454 {
 455   bfd_pef_loader_header header;
 456   asection *section;
 457
 458   asection *loadersec = NULL;
 459   unsigned char *loaderbuf = NULL;
 460   size_t loaderlen = 0;
 461   int ret;
 462
 463   loadersec = bfd_get_section_by_name (abfd, "loader");
 464   if (loadersec == NULL)
 465     goto end;
 466
 467   loaderlen = loadersec->size;
 468   loaderbuf = bfd_malloc (loaderlen);
 469   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
 470     goto error;
 471   if (bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen)
 472     goto error;
 473
 474   if (loaderlen < 56)
 475     goto error;
 476   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 477   if (ret < 0)
 478     goto error;
 479
 480   if (header.main_section < 0)
 481     goto end;
 482
 483   for (section = abfd->sections; section != NULL; section = section->next)
 484     if ((section->index + 1) == header.main_section)
 485       break;
 486
 487   if (section == NULL)
 488     goto error;
 489
 490   abfd->start_address = section->vma + header.main_offset;
 491
 492  end:
 493   if (loaderbuf != NULL)
 494     free (loaderbuf);
 495   return 0;
 496
 497  error:
 498   if (loaderbuf != NULL)
 499     free (loaderbuf);
 500   return -1;
 501 }
 502
 503 int
 504 bfd_pef_scan (abfd, header, mdata)
 505      bfd *abfd;
 506      bfd_pef_header *header;
 507      bfd_pef_data_struct *mdata;
 508 {
 509   unsigned int i;
 510   enum bfd_architecture cputype;
 511   unsigned long cpusubtype;
 512
 513   mdata->header = *header;
 514
 515   bfd_pef_convert_architecture (header->architecture, &cputype, &cpusubtype);
 516   if (cputype == bfd_arch_unknown)
 517     {
 518       fprintf (stderr, "bfd_pef_scan: unknown architecture 0x%lx\n",
 519                header->architecture);
 520       return -1;
 521     }
 522   bfd_set_arch_mach (abfd, cputype, cpusubtype);
 523
 524   mdata->header = *header;
 525
 526   abfd->flags = (abfd->xvec->object_flags
 527                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
 528
 529   if (header->section_count != 0)
 530     {
 531       mdata->sections = bfd_alloc (abfd, header->section_count * sizeof (bfd_pef_section));
 532
 533       if (mdata->sections == NULL)
 534         return -1;
 535
 536       for (i = 0; i < header->section_count; i++)
 537         {
 538           bfd_pef_section *cur = &mdata->sections[i];
 539           cur->header_offset = 40 + (i * 28);
 540           if (bfd_pef_scan_section (abfd, cur) < 0)
 541             return -1;
 542         }
 543     }
 544
 545   if (bfd_pef_scan_start_address (abfd) < 0)
 546     return -1;
 547
 548   abfd->tdata.pef_data = mdata;
 549
 550   return 0;
 551 }
 552
 553 static int
 554 bfd_pef_read_header (bfd *abfd, bfd_pef_header *header)
 555 {
 556   unsigned char buf[40];
 557
 558   bfd_seek (abfd, 0, SEEK_SET);
 559
 560   if (bfd_bread ((void *) buf, 40, abfd) != 40)
 561     return -1;
 562
 563   header->tag1 = bfd_getb32 (buf);
 564   header->tag2 = bfd_getb32 (buf + 4);
 565   header->architecture = bfd_getb32 (buf + 8);
 566   header->format_version = bfd_getb32 (buf + 12);
 567   header->timestamp = bfd_getb32 (buf + 16);
 568   header->old_definition_version = bfd_getb32 (buf + 20);
 569   header->old_implementation_version = bfd_getb32 (buf + 24);
 570   header->current_version = bfd_getb32 (buf + 28);
 571   header->section_count = bfd_getb32 (buf + 32) + 1;
 572   header->instantiated_section_count = bfd_getb32 (buf + 34);
 573   header->reserved = bfd_getb32 (buf + 36);
 574
 575   return 0;
 576 }
 577
 578 static const bfd_target *
 579 bfd_pef_object_p (bfd *abfd)
 580 {
 581   struct bfd_preserve preserve;
 582   bfd_pef_header header;
 583
 584   preserve.marker = NULL;
 585   if (bfd_pef_read_header (abfd, &header) != 0)
 586     goto wrong;
 587
 588   if (header.tag1 != BFD_PEF_TAG1 || header.tag2 != BFD_PEF_TAG2)
 589     goto wrong;
 590
 591   preserve.marker = bfd_zalloc (abfd, sizeof (bfd_pef_data_struct));
 592   if (preserve.marker == NULL
 593       || !bfd_preserve_save (abfd, &preserve))
 594     goto fail;
 595
 596   if (bfd_pef_scan (abfd, &header,
 597                     (bfd_pef_data_struct *) preserve.marker) != 0)
 598     goto wrong;
 599
 600   bfd_preserve_finish (abfd, &preserve);
 601   return abfd->xvec;
 602
 603  wrong:
 604   bfd_set_error (bfd_error_wrong_format);
 605
 606  fail:
 607   if (preserve.marker != NULL)
 608     bfd_preserve_restore (abfd, &preserve);
 609   return NULL;
 610 }
 611
 612 static int
 613 bfd_pef_parse_traceback_tables (bfd *abfd,
 614                                 asection *sec,
 615                                 unsigned char *buf,
 616                                 size_t len,
 617                                 long *nsym,
 618                                 asymbol **csym)
 619 {
 620   char *name;
 621
 622   asymbol function;
 623   asymbol traceback;
 624
 625   const char *const tbprefix = "__traceback_";
 626   size_t tbnamelen;
 627
 628   size_t pos = 0;
 629   unsigned long count = 0;
 630   int ret;
 631
 632   for (;;)
 633     {
 634       /* We're reading symbols two at a time.  */
 635       if (csym && ((csym[count] == NULL) || (csym[count + 1] == NULL)))
 636         break;
 637
 638       pos += 3;
 639       pos -= (pos % 4);
 640
 641       while ((pos + 4) <= len)
 642         {
 643           if (bfd_getb32 (buf + pos) == 0)
 644             break;
 645           pos += 4;
 646         }
 647
 648       if ((pos + 4) > len)
 649         break;
 650
 651       ret = bfd_pef_parse_traceback_table (abfd, sec, buf, len, pos + 4,
 652                                            &function, 0);
 653       if (ret < 0)
 654         {
 655           /* Skip over 0x0L to advance to next possible traceback table.  */
 656           pos += 4;
 657           continue;
 658         }
 659
 660       BFD_ASSERT (function.name != NULL);
 661
 662       /* Don't bother to compute the name if we are just
 663          counting symbols.  */
 664       if (csym)
 665         {
 666           tbnamelen = strlen (tbprefix) + strlen (function.name);
 667           name = bfd_alloc (abfd, tbnamelen + 1);
 668           if (name == NULL)
 669             {
 670               bfd_release (abfd, (void *) function.name);
 671               function.name = NULL;
 672               break;
 673             }
 674           snprintf (name, tbnamelen + 1, "%s%s", tbprefix, function.name);
 675           traceback.name = name;
 676           traceback.value = pos;
 677           traceback.the_bfd = abfd;
 678           traceback.section = sec;
 679           traceback.flags = 0;
 680           traceback.udata.i = ret;
 681
 682           *(csym[count]) = function;
 683           *(csym[count + 1]) = traceback;
 684         }
 685
 686       pos += ret;
 687       count += 2;
 688     }
 689
 690   *nsym = count;
 691   return 0;
 692 }
 693
 694 static int
 695 bfd_pef_parse_function_stub (bfd *abfd ATTRIBUTE_UNUSED,
 696                              unsigned char *buf,
 697                              size_t len,
 698                              unsigned long *offset)
 699 {
 700   BFD_ASSERT (len == 24);
 701
 702   if ((bfd_getb32 (buf) & 0xffff0000) != 0x81820000)
 703     return -1;
 704   if (bfd_getb32 (buf + 4) != 0x90410014)
 705     return -1;
 706   if (bfd_getb32 (buf + 8) != 0x800c0000)
 707     return -1;
 708   if (bfd_getb32 (buf + 12) != 0x804c0004)
 709     return -1;
 710   if (bfd_getb32 (buf + 16) != 0x7c0903a6)
 711     return -1;
 712   if (bfd_getb32 (buf + 20) != 0x4e800420)
 713     return -1;
 714
 715   if (offset != NULL)
 716     *offset = (bfd_getb32 (buf) & 0x0000ffff) / 4;
 717
 718   return 0;
 719 }
 720
 721 static int
 722 bfd_pef_parse_function_stubs (bfd *abfd,
 723                               asection *codesec,
 724                               unsigned char *codebuf,
 725                               size_t codelen,
 726                               unsigned char *loaderbuf,
 727                               size_t loaderlen,
 728                               unsigned long *nsym,
 729                               asymbol **csym)
 730 {
 731   const char *const sprefix = "__stub_";
 732
 733   size_t codepos = 0;
 734   unsigned long count = 0;
 735
 736   bfd_pef_loader_header header;
 737   bfd_pef_imported_library *libraries = NULL;
 738   bfd_pef_imported_symbol *imports = NULL;
 739
 740   unsigned long i;
 741   int ret;
 742
 743   if (loaderlen < 56)
 744     goto error;
 745
 746   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 747   if (ret < 0)
 748     goto error;
 749
 750   libraries = bfd_malloc
 751     (header.imported_library_count * sizeof (bfd_pef_imported_library));
 752   imports = bfd_malloc
 753     (header.total_imported_symbol_count * sizeof (bfd_pef_imported_symbol));
 754
 755   if (loaderlen < (56 + (header.imported_library_count * 24)))
 756     goto error;
 757   for (i = 0; i < header.imported_library_count; i++)
 758     {
 759       ret = bfd_pef_parse_imported_library
 760         (abfd, loaderbuf + 56 + (i * 24), 24, &libraries[i]);
 761       if (ret < 0)
 762         goto error;
 763     }
 764
 765   if (loaderlen < (56 + (header.imported_library_count * 24)
 766                    + (header.total_imported_symbol_count * 4)))
 767     goto error;
 768   for (i = 0; i < header.total_imported_symbol_count; i++)
 769     {
 770       ret = (bfd_pef_parse_imported_symbol
 771              (abfd,
 772               loaderbuf + 56 + (header.imported_library_count * 24) + (i * 4),
 773               4, &imports[i]));
 774       if (ret < 0)
 775         goto error;
 776     }
 777
 778   codepos = 0;
 779
 780   for (;;)
 781     {
 782       asymbol sym;
 783       const char *symname;
 784       char *name;
 785       unsigned long index;
 786       int ret;
 787
 788       if (csym && (csym[count] == NULL))
 789         break;
 790
 791       codepos += 3;
 792       codepos -= (codepos % 4);
 793
 794       while ((codepos + 4) <= codelen)
 795         {
 796           if ((bfd_getb32 (codebuf + codepos) & 0xffff0000) == 0x81820000)
 797             break;
 798           codepos += 4;
 799         }
 800
 801       if ((codepos + 4) > codelen)
 802         break;
 803
 804       ret = bfd_pef_parse_function_stub (abfd, codebuf + codepos, 24, &index);
 805       if (ret < 0)
 806         {
 807           codepos += 24;
 808           continue;
 809         }
 810
 811       if (index >= header.total_imported_symbol_count)
 812         {
 813           codepos += 24;
 814           continue;
 815         }
 816
 817       {
 818         size_t max, namelen;
 819         const char *s;
 820
 821         if (loaderlen < (header.loader_strings_offset + imports[index].name))
 822           goto error;
 823
 824         max = loaderlen - (header.loader_strings_offset + imports[index].name);
 825         symname = (char *) loaderbuf;
 826         symname += header.loader_strings_offset + imports[index].name;
 827         namelen = 0;
 828         for (s = symname; s < (symname + max); s++)
 829           {
 830             if (*s == '\0')
 831               break;
 832             if (! ISPRINT (*s))
 833               goto error;
 834             namelen++;
 835           }
 836         if (*s != '\0')
 837           goto error;
 838
 839         name = bfd_alloc (abfd, strlen (sprefix) + namelen + 1);
 840         if (name == NULL)
 841           break;
 842
 843         snprintf (name, strlen (sprefix) + namelen + 1, "%s%s",
 844                   sprefix, symname);
 845         sym.name = name;
 846       }
 847
 848       sym.value = codepos;
 849       sym.the_bfd = abfd;
 850       sym.section = codesec;
 851       sym.flags = 0;
 852       sym.udata.i = 0;
 853
 854       codepos += 24;
 855
 856       if (csym != NULL)
 857         *(csym[count]) = sym;
 858
 859       count++;
 860     }
 861
 862   goto end;
 863
 864  end:
 865   if (libraries != NULL)
 866     free (libraries);
 867   if (imports != NULL)
 868     free (imports);
 869   *nsym = count;
 870   return 0;
 871
 872  error:
 873   if (libraries != NULL)
 874     free (libraries);
 875   if (imports != NULL)
 876     free (imports);
 877   *nsym = count;
 878   return -1;
 879 }
 880
 881 static long
 882 bfd_pef_parse_symbols (bfd *abfd, asymbol **csym)
 883 {
 884   unsigned long count = 0;
 885
 886   asection *codesec = NULL;
 887   unsigned char *codebuf = NULL;
 888   size_t codelen = 0;
 889
 890   asection *loadersec = NULL;
 891   unsigned char *loaderbuf = NULL;
 892   size_t loaderlen = 0;
 893
 894   codesec = bfd_get_section_by_name (abfd, "code");
 895   if (codesec != NULL)
 896     {
 897       codelen = codesec->size;
 898       codebuf = bfd_malloc (codelen);
 899       if (bfd_seek (abfd, codesec->filepos, SEEK_SET) < 0)
 900         goto end;
 901       if (bfd_bread ((void *) codebuf, codelen, abfd) != codelen)
 902         goto end;
 903     }
 904
 905   loadersec = bfd_get_section_by_name (abfd, "loader");
 906   if (loadersec != NULL)
 907     {
 908       loaderlen = loadersec->size;
 909       loaderbuf = bfd_malloc (loaderlen);
 910       if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
 911         goto end;
 912       if (bfd_bread ((void *) loaderbuf, loaderlen, abfd) != loaderlen)
 913         goto end;
 914     }
 915
 916   count = 0;
 917   if (codesec != NULL)
 918     {
 919       long ncount = 0;
 920       bfd_pef_parse_traceback_tables (abfd, codesec, codebuf, codelen,
 921                                       &ncount, csym);
 922       count += ncount;
 923     }
 924
 925   if ((codesec != NULL) && (loadersec != NULL))
 926     {
 927       unsigned long ncount = 0;
 928       bfd_pef_parse_function_stubs
 929         (abfd, codesec, codebuf, codelen, loaderbuf, loaderlen, &ncount,
 930          (csym != NULL) ? (csym + count) : NULL);
 931       count += ncount;
 932     }
 933
 934   if (csym != NULL)
 935     csym[count] = NULL;
 936
 937  end:
 938   if (codebuf != NULL)
 939     free (codebuf);
 940
 941   if (loaderbuf != NULL)
 942     free (loaderbuf);
 943
 944   return count;
 945 }
 946
 947 static long
 948 bfd_pef_count_symbols (bfd *abfd)
 949 {
 950   return bfd_pef_parse_symbols (abfd, NULL);
 951 }
 952
 953 static long
 954 bfd_pef_get_symtab_upper_bound (bfd *abfd)
 955 {
 956   long nsyms = bfd_pef_count_symbols (abfd);
 957
 958   if (nsyms < 0)
 959     return nsyms;
 960   return ((nsyms + 1) * sizeof (asymbol *));
 961 }
 962
 963 static long
 964 bfd_pef_canonicalize_symtab (bfd *abfd, asymbol **alocation)
 965 {
 966   long i;
 967   asymbol *syms;
 968   long ret;
 969   long nsyms = bfd_pef_count_symbols (abfd);
 970
 971   if (nsyms < 0)
 972     return nsyms;
 973
 974   syms = bfd_alloc (abfd, nsyms * sizeof (asymbol));
 975   if (syms == NULL)
 976     return -1;
 977
 978   for (i = 0; i < nsyms; i++)
 979     alocation[i] = &syms[i];
 980
 981   alocation[nsyms] = NULL;
 982
 983   ret = bfd_pef_parse_symbols (abfd, alocation);
 984   if (ret != nsyms)
 985     return 0;
 986
 987   return ret;
 988 }
 989
 990 static asymbol *
 991 bfd_pef_make_empty_symbol (bfd *abfd)
 992 {
 993   return bfd_alloc (abfd, sizeof (asymbol));
 994 }
 995
 996 static void
 997 bfd_pef_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
 998                          asymbol *symbol,
 999                          symbol_info *ret)
1000 {
1001   bfd_symbol_info (symbol, ret);
1002 }
1003
1004 static int
1005 bfd_pef_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
1006                         struct bfd_link_info *info ATTRIBUTE_UNUSED)
1007 {
1008   return 0;
1009 }
1010
1011 const bfd_target pef_vec =
1012 {
1013   "pef",                        /* Name.  */
1014   bfd_target_pef_flavour,       /* Flavour.  */
1015   BFD_ENDIAN_BIG,               /* Byteorder.  */
1016   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1017   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1018    HAS_LINENO | HAS_DEBUG |
1019    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1020   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1021    | SEC_ROM | SEC_HAS_CONTENTS), /* Section_flags.  */
1022   0,                            /* Symbol_leading_char.  */
1023   ' ',                          /* AR_pad_char.  */
1024   16,                           /* AR_max_namelen.  */
1025   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1026   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1027   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1028   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1029   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1030   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1031   {                             /* bfd_check_format.  */
1032     _bfd_dummy_target,
1033     bfd_pef_object_p,           /* bfd_check_format.  */
1034     _bfd_dummy_target,
1035     _bfd_dummy_target,
1036   },
1037   {                             /* bfd_set_format.  */
1038     bfd_false,
1039     bfd_pef_mkobject,
1040     bfd_false,
1041     bfd_false,
1042   },
1043   {                             /* bfd_write_contents.  */
1044     bfd_false,
1045     bfd_true,
1046     bfd_false,
1047     bfd_false,
1048   },
1049
1050   BFD_JUMP_TABLE_GENERIC (bfd_pef),
1051   BFD_JUMP_TABLE_COPY (_bfd_generic),
1052   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1053   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1054   BFD_JUMP_TABLE_SYMBOLS (bfd_pef),
1055   BFD_JUMP_TABLE_RELOCS (bfd_pef),
1056   BFD_JUMP_TABLE_WRITE (bfd_pef),
1057   BFD_JUMP_TABLE_LINK (bfd_pef),
1058   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1059
1060   NULL,
1061
1062   NULL
1063 };
1064
1065 #define bfd_pef_xlib_close_and_cleanup              _bfd_generic_close_and_cleanup
1066 #define bfd_pef_xlib_bfd_free_cached_info           _bfd_generic_bfd_free_cached_info
1067 #define bfd_pef_xlib_new_section_hook               _bfd_generic_new_section_hook
1068 #define bfd_pef_xlib_get_section_contents           _bfd_generic_get_section_contents
1069 #define bfd_pef_xlib_set_section_contents           _bfd_generic_set_section_contents
1070 #define bfd_pef_xlib_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
1071 #define bfd_pef_xlib_set_section_contents_in_window _bfd_generic_set_section_contents_in_window
1072
1073 static int
1074 bfd_pef_xlib_read_header (bfd *abfd, bfd_pef_xlib_header *header)
1075 {
1076   unsigned char buf[76];
1077
1078   bfd_seek (abfd, 0, SEEK_SET);
1079
1080   if (bfd_bread ((void *) buf, 76, abfd) != 76)
1081     return -1;
1082
1083   header->tag1 = bfd_getb32 (buf);
1084   header->tag2 = bfd_getb32 (buf + 4);
1085   header->current_format = bfd_getb32 (buf + 8);
1086   header->container_strings_offset = bfd_getb32 (buf + 12);
1087   header->export_hash_offset = bfd_getb32 (buf + 16);
1088   header->export_key_offset = bfd_getb32 (buf + 20);
1089   header->export_symbol_offset = bfd_getb32 (buf + 24);
1090   header->export_names_offset = bfd_getb32 (buf + 28);
1091   header->export_hash_table_power = bfd_getb32 (buf + 32);
1092   header->exported_symbol_count = bfd_getb32 (buf + 36);
1093   header->frag_name_offset = bfd_getb32 (buf + 40);
1094   header->frag_name_length = bfd_getb32 (buf + 44);
1095   header->dylib_path_offset = bfd_getb32 (buf + 48);
1096   header->dylib_path_length = bfd_getb32 (buf + 52);
1097   header->cpu_family = bfd_getb32 (buf + 56);
1098   header->cpu_model = bfd_getb32 (buf + 60);
1099   header->date_time_stamp = bfd_getb32 (buf + 64);
1100   header->current_version = bfd_getb32 (buf + 68);
1101   header->old_definition_version = bfd_getb32 (buf + 72);
1102   header->old_implementation_version = bfd_getb32 (buf + 76);
1103
1104   return 0;
1105 }
1106
1107 static int
1108 bfd_pef_xlib_scan (bfd *abfd, bfd_pef_xlib_header *header)
1109 {
1110   bfd_pef_xlib_data_struct *mdata = NULL;
1111
1112   mdata = bfd_alloc (abfd, sizeof (* mdata));
1113   if (mdata == NULL)
1114     return -1;
1115
1116   mdata->header = *header;
1117
1118   abfd->flags = (abfd->xvec->object_flags
1119                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
1120
1121   abfd->tdata.pef_xlib_data = mdata;
1122
1123   return 0;
1124 }
1125
1126 static const bfd_target *
1127 bfd_pef_xlib_object_p (bfd *abfd)
1128 {
1129   struct bfd_preserve preserve;
1130   bfd_pef_xlib_header header;
1131
1132   if (bfd_pef_xlib_read_header (abfd, &header) != 0)
1133     {
1134       bfd_set_error (bfd_error_wrong_format);
1135       return NULL;
1136     }
1137
1138   if ((header.tag1 != BFD_PEF_XLIB_TAG1)
1139       || ((header.tag2 != BFD_PEF_VLIB_TAG2)
1140           && (header.tag2 != BFD_PEF_BLIB_TAG2)))
1141     {
1142       bfd_set_error (bfd_error_wrong_format);
1143       return NULL;
1144     }
1145
1146   if (! bfd_preserve_save (abfd, &preserve))
1147     {
1148       bfd_set_error (bfd_error_wrong_format);
1149       return NULL;
1150     }
1151
1152   if (bfd_pef_xlib_scan (abfd, &header) != 0)
1153     {
1154       bfd_preserve_restore (abfd, &preserve);
1155       bfd_set_error (bfd_error_wrong_format);
1156       return NULL;
1157     }
1158
1159   bfd_preserve_finish (abfd, &preserve);
1160   return abfd->xvec;
1161 }
1162
1163 const bfd_target pef_xlib_vec =
1164 {
1165   "pef-xlib",                   /* Name.  */
1166   bfd_target_pef_xlib_flavour,  /* Flavour.  */
1167   BFD_ENDIAN_BIG,               /* Byteorder */
1168   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1169   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1170    HAS_LINENO | HAS_DEBUG |
1171    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1172   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1173    | SEC_ROM | SEC_HAS_CONTENTS),/* Section_flags.  */
1174   0,                            /* Symbol_leading_char.  */
1175   ' ',                          /* AR_pad_char.  */
1176   16,                           /* AR_max_namelen.  */
1177   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1178   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1179   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1180   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1181   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1182   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1183   {                             /* bfd_check_format.  */
1184     _bfd_dummy_target,
1185     bfd_pef_xlib_object_p,      /* bfd_check_format.  */
1186     _bfd_dummy_target,
1187     _bfd_dummy_target,
1188   },
1189   {                             /* bfd_set_format.  */
1190     bfd_false,
1191     bfd_pef_mkobject,
1192     bfd_false,
1193     bfd_false,
1194   },
1195   {                             /* bfd_write_contents.  */
1196     bfd_false,
1197     bfd_true,
1198     bfd_false,
1199     bfd_false,
1200   },
1201
1202   BFD_JUMP_TABLE_GENERIC (bfd_pef_xlib),
1203   BFD_JUMP_TABLE_COPY (_bfd_generic),
1204   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1205   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1206   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
1207   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1208   BFD_JUMP_TABLE_WRITE (_bfd_nowrite),
1209   BFD_JUMP_TABLE_LINK (_bfd_nolink),
1210   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1211
1212   NULL,
1213
1214   NULL
1215 };