bfd/pef.c

   1 /* PEF support for BFD.
   2    Copyright (C) 1999-2024 Free Software Foundation, Inc.
   3
   4    This file is part of BFD, the Binary File Descriptor library.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21 /* PEF (Preferred Executable Format) is the binary file format for late
  22    classic Mac OS versions (before Darwin).  It is supported by both m68k
  23    and PowerPc.  It is also called CFM (Code Fragment Manager).  */
  24
  25 #include "sysdep.h"
  26 #include "safe-ctype.h"
  27 #include "pef.h"
  28 #include "pef-traceback.h"
  29 #include "bfd.h"
  30 #include "libbfd.h"
  31 #include "libiberty.h"
  32
  33 #ifndef BFD_IO_FUNCS
  34 #define BFD_IO_FUNCS 0
  35 #endif
  36
  37 #define bfd_pef_close_and_cleanup                   _bfd_generic_close_and_cleanup
  38 #define bfd_pef_bfd_free_cached_info                _bfd_generic_bfd_free_cached_info
  39 #define bfd_pef_new_section_hook                    _bfd_generic_new_section_hook
  40 #define bfd_pef_bfd_is_local_label_name             bfd_generic_is_local_label_name
  41 #define bfd_pef_bfd_is_target_special_symbol        _bfd_bool_bfd_asymbol_false
  42 #define bfd_pef_get_lineno                          _bfd_nosymbols_get_lineno
  43 #define bfd_pef_find_nearest_line                   _bfd_nosymbols_find_nearest_line
  44 #define bfd_pef_find_nearest_line_with_alt          _bfd_nosymbols_find_nearest_line_with_alt
  45 #define bfd_pef_find_line                           _bfd_nosymbols_find_line
  46 #define bfd_pef_find_inliner_info                   _bfd_nosymbols_find_inliner_info
  47 #define bfd_pef_get_symbol_version_string           _bfd_nosymbols_get_symbol_version_string
  48 #define bfd_pef_bfd_make_debug_symbol               _bfd_nosymbols_bfd_make_debug_symbol
  49 #define bfd_pef_read_minisymbols                    _bfd_generic_read_minisymbols
  50 #define bfd_pef_minisymbol_to_symbol                _bfd_generic_minisymbol_to_symbol
  51 #define bfd_pef_set_arch_mach                       _bfd_generic_set_arch_mach
  52 #define bfd_pef_get_section_contents                _bfd_generic_get_section_contents
  53 #define bfd_pef_set_section_contents                _bfd_generic_set_section_contents
  54 #define bfd_pef_bfd_get_relocated_section_contents  bfd_generic_get_relocated_section_contents
  55 #define bfd_pef_bfd_relax_section                   bfd_generic_relax_section
  56 #define bfd_pef_bfd_gc_sections                     bfd_generic_gc_sections
  57 #define bfd_pef_bfd_lookup_section_flags            bfd_generic_lookup_section_flags
  58 #define bfd_pef_bfd_merge_sections                  bfd_generic_merge_sections
  59 #define bfd_pef_bfd_is_group_section                bfd_generic_is_group_section
  60 #define bfd_pef_bfd_group_name                      bfd_generic_group_name
  61 #define bfd_pef_bfd_discard_group                   bfd_generic_discard_group
  62 #define bfd_pef_section_already_linked              _bfd_generic_section_already_linked
  63 #define bfd_pef_bfd_define_common_symbol            bfd_generic_define_common_symbol
  64 #define bfd_pef_bfd_link_hide_symbol                _bfd_generic_link_hide_symbol
  65 #define bfd_pef_bfd_define_start_stop               bfd_generic_define_start_stop
  66 #define bfd_pef_bfd_link_hash_table_create          _bfd_generic_link_hash_table_create
  67 #define bfd_pef_bfd_link_add_symbols                _bfd_generic_link_add_symbols
  68 #define bfd_pef_bfd_link_just_syms                  _bfd_generic_link_just_syms
  69 #define bfd_pef_bfd_copy_link_hash_symbol_type \
  70   _bfd_generic_copy_link_hash_symbol_type
  71 #define bfd_pef_bfd_final_link                      _bfd_generic_final_link
  72 #define bfd_pef_bfd_link_split_section              _bfd_generic_link_split_section
  73 #define bfd_pef_bfd_link_check_relocs               _bfd_generic_link_check_relocs
  74
  75 static int
  76 bfd_pef_parse_traceback_table (bfd *abfd,
  77                                asection *section,
  78                                unsigned char *buf,
  79                                size_t len,
  80                                size_t pos,
  81                                asymbol *sym,
  82                                FILE *file)
  83 {
  84   struct traceback_table table;
  85   size_t offset;
  86   const char *s;
  87   asymbol tmpsymbol;
  88
  89   if (sym == NULL)
  90     sym = & tmpsymbol;
  91
  92   sym->name = NULL;
  93   sym->value = 0;
  94   sym->the_bfd = abfd;
  95   sym->section = section;
  96   sym->flags = 0;
  97   sym->udata.i = 0;
  98
  99   /* memcpy is fine since all fields are unsigned char.  */
 100   if ((pos + 8) > len)
 101     return -1;
 102   memcpy (&table, buf + pos, 8);
 103
 104   /* Calling code relies on returned symbols having a name and
 105      correct offset.  */
 106   if ((table.lang != TB_C) && (table.lang != TB_CPLUSPLUS))
 107     return -1;
 108
 109   if (! (table.flags2 & TB_NAME_PRESENT))
 110     return -1;
 111
 112   if (! (table.flags1 & TB_HAS_TBOFF))
 113     return -1;
 114
 115   offset = 8;
 116
 117   if ((table.flags5 & TB_FLOATPARAMS) || (table.fixedparams))
 118     offset += 4;
 119
 120   if (table.flags1 & TB_HAS_TBOFF)
 121     {
 122       struct traceback_table_tboff off;
 123
 124       if ((pos + offset + 4) > len)
 125         return -1;
 126       off.tb_offset = bfd_getb32 (buf + pos + offset);
 127       offset += 4;
 128
 129       /* Need to subtract 4 because the offset includes the 0x0L
 130          preceding the table.  */
 131       if (file != NULL)
 132         fprintf (file, " [offset = 0x%lx]", off.tb_offset);
 133
 134       if ((file == NULL) && ((off.tb_offset + 4) > (pos + offset)))
 135         return -1;
 136
 137       sym->value = pos - off.tb_offset - 4;
 138     }
 139
 140   if (table.flags2 & TB_INT_HNDL)
 141     offset += 4;
 142
 143   if (table.flags1 & TB_HAS_CTL)
 144     {
 145       struct traceback_table_anchors anchors;
 146
 147       if ((pos + offset + 4) > len)
 148         return -1;
 149       anchors.ctl_info = bfd_getb32 (buf + pos + offset);
 150       offset += 4;
 151
 152       if (anchors.ctl_info > 1024)
 153         return -1;
 154
 155       offset += anchors.ctl_info * 4;
 156     }
 157
 158   if (table.flags2 & TB_NAME_PRESENT)
 159     {
 160       struct traceback_table_routine name;
 161       char *namebuf;
 162
 163       if ((pos + offset + 2) > len)
 164         return -1;
 165       name.name_len = bfd_getb16 (buf + pos + offset);
 166       offset += 2;
 167
 168       if (name.name_len > 4096)
 169         return -1;
 170
 171       if ((pos + offset + name.name_len) > len)
 172         return -1;
 173
 174       namebuf = bfd_alloc (abfd, name.name_len + 1);
 175       if (namebuf == NULL)
 176         return -1;
 177
 178       memcpy (namebuf, buf + pos + offset, name.name_len);
 179       namebuf[name.name_len] = '\0';
 180
 181       /* Strip leading period inserted by compiler.  */
 182       if (namebuf[0] == '.')
 183         memmove (namebuf, namebuf + 1, name.name_len);
 184
 185       sym->name = namebuf;
 186
 187       for (s = sym->name; (*s != '\0'); s++)
 188         if (! ISPRINT (*s))
 189           return -1;
 190
 191       offset += name.name_len;
 192     }
 193
 194   if (table.flags2 & TB_USES_ALLOCA)
 195     offset += 4;
 196
 197   if (table.flags4 & TB_HAS_VEC_INFO)
 198     offset += 4;
 199
 200   if (file != NULL)
 201     fprintf (file, " [length = 0x%lx]", (unsigned long) offset);
 202
 203   return offset;
 204 }
 205
 206 static void
 207 bfd_pef_print_symbol (bfd *abfd,
 208                       void * afile,
 209                       asymbol *symbol,
 210                       bfd_print_symbol_type how)
 211 {
 212   FILE *file = (FILE *) afile;
 213
 214   switch (how)
 215     {
 216     case bfd_print_symbol_name:
 217       fprintf (file, "%s", symbol->name);
 218       break;
 219     default:
 220       bfd_print_symbol_vandf (abfd, (void *) file, symbol);
 221       fprintf (file, " %-5s %s", symbol->section->name, symbol->name);
 222       if (startswith (symbol->name, "__traceback_"))
 223         {
 224           unsigned char *buf;
 225           size_t offset = symbol->value + 4;
 226           size_t len = symbol->udata.i;
 227
 228           buf = bfd_malloc (len);
 229           if (buf == NULL
 230               || !bfd_get_section_contents (abfd, symbol->section, buf,
 231                                             offset, len)
 232               || bfd_pef_parse_traceback_table (abfd, symbol->section, buf,
 233                                                 len, 0, NULL, file) < 0)
 234             fprintf (file, " [ERROR]");
 235           free (buf);
 236         }
 237     }
 238 }
 239
 240 static void
 241 bfd_pef_convert_architecture (unsigned long architecture,
 242                               enum bfd_architecture *type,
 243                               unsigned long *subtype)
 244 {
 245   const unsigned long ARCH_POWERPC = 0x70777063; /* 'pwpc'.  */
 246   const unsigned long ARCH_M68K = 0x6d36386b; /* 'm68k'.  */
 247
 248   *subtype = bfd_arch_unknown;
 249   *type = bfd_arch_unknown;
 250
 251   if (architecture == ARCH_POWERPC)
 252     *type = bfd_arch_powerpc;
 253   else if (architecture == ARCH_M68K)
 254     *type = bfd_arch_m68k;
 255 }
 256
 257 static bool
 258 bfd_pef_mkobject (bfd *abfd ATTRIBUTE_UNUSED)
 259 {
 260   return true;
 261 }
 262
 263 static const char *bfd_pef_section_name (bfd_pef_section *section)
 264 {
 265   switch (section->section_kind)
 266     {
 267     case BFD_PEF_SECTION_CODE: return "code";
 268     case BFD_PEF_SECTION_UNPACKED_DATA: return "unpacked-data";
 269     case BFD_PEF_SECTION_PACKED_DATA: return "packed-data";
 270     case BFD_PEF_SECTION_CONSTANT: return "constant";
 271     case BFD_PEF_SECTION_LOADER: return "loader";
 272     case BFD_PEF_SECTION_DEBUG: return "debug";
 273     case BFD_PEF_SECTION_EXEC_DATA: return "exec-data";
 274     case BFD_PEF_SECTION_EXCEPTION: return "exception";
 275     case BFD_PEF_SECTION_TRACEBACK: return "traceback";
 276     default: return "unknown";
 277     }
 278 }
 279
 280 static unsigned long bfd_pef_section_flags (bfd_pef_section *section)
 281 {
 282   switch (section->section_kind)
 283     {
 284     case BFD_PEF_SECTION_CODE:
 285       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
 286     case BFD_PEF_SECTION_UNPACKED_DATA:
 287     case BFD_PEF_SECTION_PACKED_DATA:
 288     case BFD_PEF_SECTION_CONSTANT:
 289     case BFD_PEF_SECTION_LOADER:
 290     case BFD_PEF_SECTION_DEBUG:
 291     case BFD_PEF_SECTION_EXEC_DATA:
 292     case BFD_PEF_SECTION_EXCEPTION:
 293     case BFD_PEF_SECTION_TRACEBACK:
 294     default:
 295       return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
 296     }
 297 }
 298
 299 static asection *
 300 bfd_pef_make_bfd_section (bfd *abfd, bfd_pef_section *section)
 301 {
 302   asection *bfdsec;
 303   const char *name = bfd_pef_section_name (section);
 304
 305   bfdsec = bfd_make_section_anyway (abfd, name);
 306   if (bfdsec == NULL)
 307     return NULL;
 308
 309   bfdsec->vma = section->default_address + section->container_offset;
 310   bfdsec->lma = section->default_address + section->container_offset;
 311   bfdsec->size = section->container_length;
 312   bfdsec->filepos = section->container_offset;
 313   bfdsec->alignment_power = section->alignment;
 314
 315   bfdsec->flags = bfd_pef_section_flags (section);
 316
 317   return bfdsec;
 318 }
 319
 320 int
 321 bfd_pef_parse_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 322                              unsigned char *buf,
 323                              size_t len,
 324                              bfd_pef_loader_header *header)
 325 {
 326   BFD_ASSERT (len == 56);
 327
 328   header->main_section = bfd_getb32 (buf);
 329   header->main_offset = bfd_getb32 (buf + 4);
 330   header->init_section = bfd_getb32 (buf + 8);
 331   header->init_offset = bfd_getb32 (buf + 12);
 332   header->term_section = bfd_getb32 (buf + 16);
 333   header->term_offset = bfd_getb32 (buf + 20);
 334   header->imported_library_count = bfd_getb32 (buf + 24);
 335   header->total_imported_symbol_count = bfd_getb32 (buf + 28);
 336   header->reloc_section_count = bfd_getb32 (buf + 32);
 337   header->reloc_instr_offset = bfd_getb32 (buf + 36);
 338   header->loader_strings_offset = bfd_getb32 (buf + 40);
 339   header->export_hash_offset = bfd_getb32 (buf + 44);
 340   header->export_hash_table_power = bfd_getb32 (buf + 48);
 341   header->exported_symbol_count = bfd_getb32 (buf + 52);
 342
 343   return 0;
 344 }
 345
 346 int
 347 bfd_pef_parse_imported_library (bfd *abfd ATTRIBUTE_UNUSED,
 348                                 unsigned char *buf,
 349                                 size_t len,
 350                                 bfd_pef_imported_library *header)
 351 {
 352   BFD_ASSERT (len == 24);
 353
 354   header->name_offset = bfd_getb32 (buf);
 355   header->old_implementation_version = bfd_getb32 (buf + 4);
 356   header->current_version = bfd_getb32 (buf + 8);
 357   header->imported_symbol_count = bfd_getb32 (buf + 12);
 358   header->first_imported_symbol = bfd_getb32 (buf + 16);
 359   header->options = buf[20];
 360   header->reserved_a = buf[21];
 361   header->reserved_b = bfd_getb16 (buf + 22);
 362
 363   return 0;
 364 }
 365
 366 int
 367 bfd_pef_parse_imported_symbol (bfd *abfd ATTRIBUTE_UNUSED,
 368                                unsigned char *buf,
 369                                size_t len,
 370                                bfd_pef_imported_symbol *symbol)
 371 {
 372   unsigned long value;
 373
 374   BFD_ASSERT (len == 4);
 375
 376   value = bfd_getb32 (buf);
 377   symbol->symbol_class = value >> 24;
 378   symbol->name = value & 0x00ffffff;
 379
 380   return 0;
 381 }
 382
 383 int
 384 bfd_pef_scan_section (bfd *abfd, bfd_pef_section *section)
 385 {
 386   unsigned char buf[28];
 387
 388   if (bfd_seek (abfd, section->header_offset, SEEK_SET) != 0
 389       || bfd_read (buf, 28, abfd) != 28)
 390     return -1;
 391
 392   section->name_offset = bfd_h_get_32 (abfd, buf);
 393   section->default_address = bfd_h_get_32 (abfd, buf + 4);
 394   section->total_length = bfd_h_get_32 (abfd, buf + 8);
 395   section->unpacked_length = bfd_h_get_32 (abfd, buf + 12);
 396   section->container_length = bfd_h_get_32 (abfd, buf + 16);
 397   section->container_offset = bfd_h_get_32 (abfd, buf + 20);
 398   section->section_kind = buf[24];
 399   section->share_kind = buf[25];
 400   section->alignment = buf[26];
 401   section->reserved = buf[27];
 402
 403   section->bfd_section = bfd_pef_make_bfd_section (abfd, section);
 404   if (section->bfd_section == NULL)
 405     return -1;
 406
 407   return 0;
 408 }
 409
 410 void
 411 bfd_pef_print_loader_header (bfd *abfd ATTRIBUTE_UNUSED,
 412                              bfd_pef_loader_header *header,
 413                              FILE *file)
 414 {
 415   fprintf (file, "main_section: %ld\n", header->main_section);
 416   fprintf (file, "main_offset: %lu\n", header->main_offset);
 417   fprintf (file, "init_section: %ld\n", header->init_section);
 418   fprintf (file, "init_offset: %lu\n", header->init_offset);
 419   fprintf (file, "term_section: %ld\n", header->term_section);
 420   fprintf (file, "term_offset: %lu\n", header->term_offset);
 421   fprintf (file, "imported_library_count: %lu\n",
 422            header->imported_library_count);
 423   fprintf (file, "total_imported_symbol_count: %lu\n",
 424            header->total_imported_symbol_count);
 425   fprintf (file, "reloc_section_count: %lu\n", header->reloc_section_count);
 426   fprintf (file, "reloc_instr_offset: %lu\n", header->reloc_instr_offset);
 427   fprintf (file, "loader_strings_offset: %lu\n",
 428            header->loader_strings_offset);
 429   fprintf (file, "export_hash_offset: %lu\n", header->export_hash_offset);
 430   fprintf (file, "export_hash_table_power: %lu\n",
 431            header->export_hash_table_power);
 432   fprintf (file, "exported_symbol_count: %lu\n",
 433            header->exported_symbol_count);
 434 }
 435
 436 int
 437 bfd_pef_print_loader_section (bfd *abfd, FILE *file)
 438 {
 439   bfd_pef_loader_header header;
 440   asection *loadersec = NULL;
 441   unsigned char *loaderbuf = NULL;
 442   size_t loaderlen = 0;
 443
 444   loadersec = bfd_get_section_by_name (abfd, "loader");
 445   if (loadersec == NULL)
 446     return -1;
 447
 448   loaderlen = loadersec->size;
 449   if (loaderlen < 56)
 450     return -1;
 451   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) != 0)
 452     return -1;
 453   loaderbuf = _bfd_malloc_and_read (abfd, loaderlen, loaderlen);
 454   if (loaderbuf == NULL)
 455     return -1;
 456
 457   if (bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header) < 0)
 458     {
 459       free (loaderbuf);
 460       return -1;
 461     }
 462
 463   bfd_pef_print_loader_header (abfd, &header, file);
 464   return 0;
 465 }
 466
 467 int
 468 bfd_pef_scan_start_address (bfd *abfd)
 469 {
 470   bfd_pef_loader_header header;
 471   asection *section;
 472
 473   asection *loadersec = NULL;
 474   unsigned char *loaderbuf = NULL;
 475   size_t loaderlen = 0;
 476   int ret;
 477
 478   loadersec = bfd_get_section_by_name (abfd, "loader");
 479   if (loadersec == NULL)
 480     goto end;
 481
 482   loaderlen = loadersec->size;
 483   if (loaderlen < 56)
 484     goto error;
 485   if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) != 0)
 486     goto error;
 487   loaderbuf = _bfd_malloc_and_read (abfd, loaderlen, loaderlen);
 488   if (loaderbuf == NULL)
 489     goto error;
 490
 491   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 492   if (ret < 0)
 493     goto error;
 494
 495   if (header.main_section < 0)
 496     goto end;
 497
 498   for (section = abfd->sections; section != NULL; section = section->next)
 499     if ((long) (section->index + 1) == header.main_section)
 500       break;
 501
 502   if (section == NULL)
 503     goto error;
 504
 505   abfd->start_address = section->vma + header.main_offset;
 506
 507  end:
 508   free (loaderbuf);
 509   return 0;
 510
 511  error:
 512   free (loaderbuf);
 513   return -1;
 514 }
 515
 516 int
 517 bfd_pef_scan (bfd *abfd,
 518               bfd_pef_header *header,
 519               bfd_pef_data_struct *mdata)
 520 {
 521   unsigned int i;
 522   enum bfd_architecture cputype;
 523   unsigned long cpusubtype;
 524
 525   mdata->header = *header;
 526
 527   bfd_pef_convert_architecture (header->architecture, &cputype, &cpusubtype);
 528   if (cputype == bfd_arch_unknown)
 529     {
 530       _bfd_error_handler (_("bfd_pef_scan: unknown architecture 0x%lx"),
 531                           header->architecture);
 532       return -1;
 533     }
 534   bfd_set_arch_mach (abfd, cputype, cpusubtype);
 535
 536   mdata->header = *header;
 537
 538   abfd->flags = (abfd->xvec->object_flags
 539                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
 540
 541   if (header->section_count != 0)
 542     {
 543       mdata->sections = bfd_alloc (abfd, header->section_count * sizeof (bfd_pef_section));
 544
 545       if (mdata->sections == NULL)
 546         return -1;
 547
 548       for (i = 0; i < header->section_count; i++)
 549         {
 550           bfd_pef_section *cur = &mdata->sections[i];
 551           cur->header_offset = 40 + (i * 28);
 552           if (bfd_pef_scan_section (abfd, cur) < 0)
 553             return -1;
 554         }
 555     }
 556
 557   if (bfd_pef_scan_start_address (abfd) < 0)
 558     return -1;
 559
 560   abfd->tdata.pef_data = mdata;
 561
 562   return 0;
 563 }
 564
 565 static int
 566 bfd_pef_read_header (bfd *abfd, bfd_pef_header *header)
 567 {
 568   unsigned char buf[40];
 569
 570   if (bfd_seek (abfd, 0, SEEK_SET) != 0
 571       || bfd_read (buf, 40, abfd) != 40)
 572     return -1;
 573
 574   header->tag1 = bfd_getb32 (buf);
 575   header->tag2 = bfd_getb32 (buf + 4);
 576   header->architecture = bfd_getb32 (buf + 8);
 577   header->format_version = bfd_getb32 (buf + 12);
 578   header->timestamp = bfd_getb32 (buf + 16);
 579   header->old_definition_version = bfd_getb32 (buf + 20);
 580   header->old_implementation_version = bfd_getb32 (buf + 24);
 581   header->current_version = bfd_getb32 (buf + 28);
 582   header->section_count = bfd_getb32 (buf + 32) + 1;
 583   header->instantiated_section_count = bfd_getb32 (buf + 34);
 584   header->reserved = bfd_getb32 (buf + 36);
 585
 586   return 0;
 587 }
 588
 589 static bfd_cleanup
 590 bfd_pef_object_p (bfd *abfd)
 591 {
 592   bfd_pef_header header;
 593   bfd_pef_data_struct *mdata;
 594
 595   if (bfd_pef_read_header (abfd, &header) != 0)
 596     goto wrong;
 597
 598   if (header.tag1 != BFD_PEF_TAG1 || header.tag2 != BFD_PEF_TAG2)
 599     goto wrong;
 600
 601   mdata = (bfd_pef_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
 602   if (mdata == NULL)
 603     goto fail;
 604
 605   if (bfd_pef_scan (abfd, &header, mdata))
 606     goto wrong;
 607
 608   return _bfd_no_cleanup;
 609
 610  wrong:
 611   bfd_set_error (bfd_error_wrong_format);
 612
 613  fail:
 614   return NULL;
 615 }
 616
 617 static int
 618 bfd_pef_parse_traceback_tables (bfd *abfd,
 619                                 asection *sec,
 620                                 unsigned char *buf,
 621                                 size_t len,
 622                                 long *nsym,
 623                                 asymbol **csym)
 624 {
 625   char *name;
 626
 627   asymbol function;
 628   asymbol traceback;
 629
 630   const char *const tbprefix = "__traceback_";
 631   size_t tbnamelen;
 632
 633   size_t pos = 0;
 634   unsigned long count = 0;
 635   int ret;
 636
 637   for (;;)
 638     {
 639       /* We're reading symbols two at a time.  */
 640       if (csym && ((csym[count] == NULL) || (csym[count + 1] == NULL)))
 641         break;
 642
 643       pos += 3;
 644       pos -= (pos % 4);
 645
 646       while ((pos + 4) <= len)
 647         {
 648           if (bfd_getb32 (buf + pos) == 0)
 649             break;
 650           pos += 4;
 651         }
 652
 653       if ((pos + 4) > len)
 654         break;
 655
 656       ret = bfd_pef_parse_traceback_table (abfd, sec, buf, len, pos + 4,
 657                                            &function, 0);
 658       if (ret < 0)
 659         {
 660           /* Skip over 0x0L to advance to next possible traceback table.  */
 661           pos += 4;
 662           continue;
 663         }
 664
 665       BFD_ASSERT (function.name != NULL);
 666
 667       /* Don't bother to compute the name if we are just
 668          counting symbols.  */
 669       if (csym)
 670         {
 671           tbnamelen = strlen (tbprefix) + strlen (function.name);
 672           name = bfd_alloc (abfd, tbnamelen + 1);
 673           if (name == NULL)
 674             {
 675               bfd_release (abfd, (void *) function.name);
 676               function.name = NULL;
 677               break;
 678             }
 679           snprintf (name, tbnamelen + 1, "%s%s", tbprefix, function.name);
 680           traceback.name = name;
 681           traceback.value = pos;
 682           traceback.the_bfd = abfd;
 683           traceback.section = sec;
 684           traceback.flags = 0;
 685           traceback.udata.i = ret;
 686
 687           *(csym[count]) = function;
 688           *(csym[count + 1]) = traceback;
 689         }
 690
 691       pos += ret;
 692       count += 2;
 693     }
 694
 695   *nsym = count;
 696   return 0;
 697 }
 698
 699 static int
 700 bfd_pef_parse_function_stub (bfd *abfd ATTRIBUTE_UNUSED,
 701                              unsigned char *buf,
 702                              size_t len,
 703                              unsigned long *offset)
 704 {
 705   BFD_ASSERT (len == 24);
 706
 707   if ((bfd_getb32 (buf) & 0xffff0000) != 0x81820000)
 708     return -1;
 709   if (bfd_getb32 (buf + 4) != 0x90410014)
 710     return -1;
 711   if (bfd_getb32 (buf + 8) != 0x800c0000)
 712     return -1;
 713   if (bfd_getb32 (buf + 12) != 0x804c0004)
 714     return -1;
 715   if (bfd_getb32 (buf + 16) != 0x7c0903a6)
 716     return -1;
 717   if (bfd_getb32 (buf + 20) != 0x4e800420)
 718     return -1;
 719
 720   if (offset != NULL)
 721     *offset = (bfd_getb32 (buf) & 0x0000ffff) / 4;
 722
 723   return 0;
 724 }
 725
 726 static int
 727 bfd_pef_parse_function_stubs (bfd *abfd,
 728                               asection *codesec,
 729                               unsigned char *codebuf,
 730                               size_t codelen,
 731                               unsigned char *loaderbuf,
 732                               size_t loaderlen,
 733                               unsigned long *nsym,
 734                               asymbol **csym)
 735 {
 736   const char *const sprefix = "__stub_";
 737   size_t codepos = 0;
 738   unsigned long count = 0;
 739   bfd_pef_loader_header header;
 740   bfd_pef_imported_library *libraries = NULL;
 741   bfd_pef_imported_symbol *imports = NULL;
 742   unsigned long i;
 743   int ret;
 744
 745   if (loaderlen < 56)
 746     goto error;
 747
 748   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 749   if (ret < 0)
 750     goto error;
 751
 752   if ((loaderlen - 56) / 24 < header.imported_library_count)
 753     goto error;
 754
 755   if ((loaderlen - 56 - header.imported_library_count * 24) / 4
 756       < header.total_imported_symbol_count)
 757     goto error;
 758
 759   libraries = bfd_malloc
 760     (header.imported_library_count * sizeof (bfd_pef_imported_library));
 761   imports = bfd_malloc
 762     (header.total_imported_symbol_count * sizeof (bfd_pef_imported_symbol));
 763   if (libraries == NULL || imports == NULL)
 764     goto error;
 765
 766   for (i = 0; i < header.imported_library_count; i++)
 767     {
 768       ret = bfd_pef_parse_imported_library
 769         (abfd, loaderbuf + 56 + (i * 24), 24, &libraries[i]);
 770       if (ret < 0)
 771         goto error;
 772     }
 773
 774   for (i = 0; i < header.total_imported_symbol_count; i++)
 775     {
 776       ret = (bfd_pef_parse_imported_symbol
 777              (abfd,
 778               loaderbuf + 56 + (header.imported_library_count * 24) + (i * 4),
 779               4, &imports[i]));
 780       if (ret < 0)
 781         goto error;
 782     }
 783
 784   codepos = 0;
 785
 786   for (;;)
 787     {
 788       asymbol sym;
 789       const char *symname;
 790       char *name;
 791       unsigned long sym_index;
 792
 793       if (csym && (csym[count] == NULL))
 794         break;
 795
 796       codepos += 3;
 797       codepos -= (codepos % 4);
 798
 799       while ((codepos + 4) <= codelen)
 800         {
 801           if ((bfd_getb32 (codebuf + codepos) & 0xffff0000) == 0x81820000)
 802             break;
 803           codepos += 4;
 804         }
 805
 806       if ((codepos + 24) > codelen)
 807         break;
 808
 809       ret = bfd_pef_parse_function_stub (abfd, codebuf + codepos, 24, &sym_index);
 810       if (ret < 0)
 811         {
 812           codepos += 24;
 813           continue;
 814         }
 815
 816       if (sym_index >= header.total_imported_symbol_count)
 817         {
 818           codepos += 24;
 819           continue;
 820         }
 821
 822       {
 823         size_t max, namelen;
 824         const char *s;
 825
 826         if (loaderlen < (header.loader_strings_offset + imports[sym_index].name))
 827           goto error;
 828
 829         max = loaderlen - (header.loader_strings_offset + imports[sym_index].name);
 830         symname = (char *) loaderbuf;
 831         symname += header.loader_strings_offset + imports[sym_index].name;
 832         namelen = 0;
 833         for (s = symname; s < (symname + max); s++)
 834           {
 835             if (*s == '\0')
 836               break;
 837             if (! ISPRINT (*s))
 838               goto error;
 839             namelen++;
 840           }
 841         if (*s != '\0')
 842           goto error;
 843
 844         name = bfd_alloc (abfd, strlen (sprefix) + namelen + 1);
 845         if (name == NULL)
 846           break;
 847
 848         snprintf (name, strlen (sprefix) + namelen + 1, "%s%s",
 849                   sprefix, symname);
 850         sym.name = name;
 851       }
 852
 853       sym.value = codepos;
 854       sym.the_bfd = abfd;
 855       sym.section = codesec;
 856       sym.flags = 0;
 857       sym.udata.i = 0;
 858
 859       codepos += 24;
 860
 861       if (csym != NULL)
 862         *(csym[count]) = sym;
 863
 864       count++;
 865     }
 866
 867   goto end;
 868
 869  end:
 870   free (libraries);
 871   free (imports);
 872   *nsym = count;
 873   return 0;
 874
 875  error:
 876   free (libraries);
 877   free (imports);
 878   *nsym = count;
 879   return -1;
 880 }
 881
 882 static long
 883 bfd_pef_parse_symbols (bfd *abfd, asymbol **csym)
 884 {
 885   unsigned long count = 0;
 886
 887   asection *codesec = NULL;
 888   unsigned char *codebuf = NULL;
 889   size_t codelen = 0;
 890
 891   asection *loadersec = NULL;
 892   unsigned char *loaderbuf = NULL;
 893   size_t loaderlen = 0;
 894
 895   codesec = bfd_get_section_by_name (abfd, "code");
 896   if (codesec != NULL)
 897     {
 898       codelen = codesec->size;
 899       if (bfd_seek (abfd, codesec->filepos, SEEK_SET) != 0)
 900         goto end;
 901       codebuf = _bfd_malloc_and_read (abfd, codelen, codelen);
 902       if (codebuf == NULL)
 903         goto end;
 904     }
 905
 906   loadersec = bfd_get_section_by_name (abfd, "loader");
 907   if (loadersec != NULL)
 908     {
 909       loaderlen = loadersec->size;
 910       if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) != 0)
 911         goto end;
 912       loaderbuf = _bfd_malloc_and_read (abfd, loaderlen, loaderlen);
 913       if (loaderbuf == NULL)
 914         goto end;
 915     }
 916
 917   count = 0;
 918   if (codesec != NULL)
 919     {
 920       long ncount = 0;
 921       bfd_pef_parse_traceback_tables (abfd, codesec, codebuf, codelen,
 922                                       &ncount, csym);
 923       count += ncount;
 924     }
 925
 926   if ((codesec != NULL) && (loadersec != NULL))
 927     {
 928       unsigned long ncount = 0;
 929       bfd_pef_parse_function_stubs
 930         (abfd, codesec, codebuf, codelen, loaderbuf, loaderlen, &ncount,
 931          (csym != NULL) ? (csym + count) : NULL);
 932       count += ncount;
 933     }
 934
 935   if (csym != NULL)
 936     csym[count] = NULL;
 937
 938  end:
 939   free (codebuf);
 940   free (loaderbuf);
 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   0,                            /* match priority.  */
1019   TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
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_bool_bfd_false_error,
1034     bfd_pef_mkobject,
1035     _bfd_bool_bfd_false_error,
1036     _bfd_bool_bfd_false_error,
1037   },
1038   {                             /* bfd_write_contents.  */
1039     _bfd_bool_bfd_false_error,
1040     _bfd_bool_bfd_true,
1041     _bfd_bool_bfd_false_error,
1042     _bfd_bool_bfd_false_error,
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_set_section_contents_in_window _bfd_generic_set_section_contents_in_window
1066
1067 static int
1068 bfd_pef_xlib_read_header (bfd *abfd, bfd_pef_xlib_header *header)
1069 {
1070   unsigned char buf[80];
1071
1072   if (bfd_seek (abfd, 0, SEEK_SET) != 0
1073       || bfd_read (buf, sizeof buf, abfd) != sizeof buf)
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 bfd_cleanup
1120 bfd_pef_xlib_object_p (bfd *abfd)
1121 {
1122   bfd_pef_xlib_header header;
1123
1124   if (bfd_pef_xlib_read_header (abfd, &header) != 0)
1125     {
1126       bfd_set_error (bfd_error_wrong_format);
1127       return NULL;
1128     }
1129
1130   if ((header.tag1 != BFD_PEF_XLIB_TAG1)
1131       || ((header.tag2 != BFD_PEF_VLIB_TAG2)
1132           && (header.tag2 != BFD_PEF_BLIB_TAG2)))
1133     {
1134       bfd_set_error (bfd_error_wrong_format);
1135       return NULL;
1136     }
1137
1138   if (bfd_pef_xlib_scan (abfd, &header) != 0)
1139     {
1140       bfd_set_error (bfd_error_wrong_format);
1141       return NULL;
1142     }
1143
1144   return _bfd_no_cleanup;
1145 }
1146
1147 const bfd_target pef_xlib_vec =
1148 {
1149   "pef-xlib",                   /* Name.  */
1150   bfd_target_pef_xlib_flavour,  /* Flavour.  */
1151   BFD_ENDIAN_BIG,               /* Byteorder */
1152   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1153   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1154    HAS_LINENO | HAS_DEBUG |
1155    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1156   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1157    | SEC_ROM | SEC_HAS_CONTENTS),/* Section_flags.  */
1158   0,                            /* Symbol_leading_char.  */
1159   ' ',                          /* AR_pad_char.  */
1160   16,                           /* AR_max_namelen.  */
1161   0,                            /* match priority.  */
1162   TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
1163   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1164   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1165   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1166   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1167   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1168   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1169   {                             /* bfd_check_format.  */
1170     _bfd_dummy_target,
1171     bfd_pef_xlib_object_p,      /* bfd_check_format.  */
1172     _bfd_dummy_target,
1173     _bfd_dummy_target,
1174   },
1175   {                             /* bfd_set_format.  */
1176     _bfd_bool_bfd_false_error,
1177     bfd_pef_mkobject,
1178     _bfd_bool_bfd_false_error,
1179     _bfd_bool_bfd_false_error,
1180   },
1181   {                             /* bfd_write_contents.  */
1182     _bfd_bool_bfd_false_error,
1183     _bfd_bool_bfd_true,
1184     _bfd_bool_bfd_false_error,
1185     _bfd_bool_bfd_false_error,
1186   },
1187
1188   BFD_JUMP_TABLE_GENERIC (bfd_pef_xlib),
1189   BFD_JUMP_TABLE_COPY (_bfd_generic),
1190   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1191   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1192   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
1193   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1194   BFD_JUMP_TABLE_WRITE (_bfd_nowrite),
1195   BFD_JUMP_TABLE_LINK (_bfd_nolink),
1196   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1197
1198   NULL,
1199
1200   NULL
1201 };