bfd/pef.c

   1 /* PEF support for BFD.
   2    Copyright (C) 1999-2022 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_line                           _bfd_nosymbols_find_line
  45 #define bfd_pef_find_inliner_info                   _bfd_nosymbols_find_inliner_info
  46 #define bfd_pef_get_symbol_version_string           _bfd_nosymbols_get_symbol_version_string
  47 #define bfd_pef_bfd_make_debug_symbol               _bfd_nosymbols_bfd_make_debug_symbol
  48 #define bfd_pef_read_minisymbols                    _bfd_generic_read_minisymbols
  49 #define bfd_pef_minisymbol_to_symbol                _bfd_generic_minisymbol_to_symbol
  50 #define bfd_pef_set_arch_mach                       _bfd_generic_set_arch_mach
  51 #define bfd_pef_get_section_contents                _bfd_generic_get_section_contents
  52 #define bfd_pef_set_section_contents                _bfd_generic_set_section_contents
  53 #define bfd_pef_bfd_get_relocated_section_contents  bfd_generic_get_relocated_section_contents
  54 #define bfd_pef_bfd_relax_section                   bfd_generic_relax_section
  55 #define bfd_pef_bfd_gc_sections                     bfd_generic_gc_sections
  56 #define bfd_pef_bfd_lookup_section_flags            bfd_generic_lookup_section_flags
  57 #define bfd_pef_bfd_merge_sections                  bfd_generic_merge_sections
  58 #define bfd_pef_bfd_is_group_section                bfd_generic_is_group_section
  59 #define bfd_pef_bfd_group_name                      bfd_generic_group_name
  60 #define bfd_pef_bfd_discard_group                   bfd_generic_discard_group
  61 #define bfd_pef_section_already_linked              _bfd_generic_section_already_linked
  62 #define bfd_pef_bfd_define_common_symbol            bfd_generic_define_common_symbol
  63 #define bfd_pef_bfd_link_hide_symbol                _bfd_generic_link_hide_symbol
  64 #define bfd_pef_bfd_define_start_stop               bfd_generic_define_start_stop
  65 #define bfd_pef_bfd_link_hash_table_create          _bfd_generic_link_hash_table_create
  66 #define bfd_pef_bfd_link_add_symbols                _bfd_generic_link_add_symbols
  67 #define bfd_pef_bfd_link_just_syms                  _bfd_generic_link_just_syms
  68 #define bfd_pef_bfd_copy_link_hash_symbol_type \
  69   _bfd_generic_copy_link_hash_symbol_type
  70 #define bfd_pef_bfd_final_link                      _bfd_generic_final_link
  71 #define bfd_pef_bfd_link_split_section              _bfd_generic_link_split_section
  72 #define bfd_pef_get_section_contents_in_window      _bfd_generic_get_section_contents_in_window
  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 + 1);
 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   bfd_seek (abfd, section->header_offset, SEEK_SET);
 389   if (bfd_bread ((void *) 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   bfd_seek (abfd, 0, SEEK_SET);
 571
 572   if (bfd_bread ((void *) buf, 40, abfd) != 40)
 573     return -1;
 574
 575   header->tag1 = bfd_getb32 (buf);
 576   header->tag2 = bfd_getb32 (buf + 4);
 577   header->architecture = bfd_getb32 (buf + 8);
 578   header->format_version = bfd_getb32 (buf + 12);
 579   header->timestamp = bfd_getb32 (buf + 16);
 580   header->old_definition_version = bfd_getb32 (buf + 20);
 581   header->old_implementation_version = bfd_getb32 (buf + 24);
 582   header->current_version = bfd_getb32 (buf + 28);
 583   header->section_count = bfd_getb32 (buf + 32) + 1;
 584   header->instantiated_section_count = bfd_getb32 (buf + 34);
 585   header->reserved = bfd_getb32 (buf + 36);
 586
 587   return 0;
 588 }
 589
 590 static bfd_cleanup
 591 bfd_pef_object_p (bfd *abfd)
 592 {
 593   bfd_pef_header header;
 594   bfd_pef_data_struct *mdata;
 595
 596   if (bfd_pef_read_header (abfd, &header) != 0)
 597     goto wrong;
 598
 599   if (header.tag1 != BFD_PEF_TAG1 || header.tag2 != BFD_PEF_TAG2)
 600     goto wrong;
 601
 602   mdata = (bfd_pef_data_struct *) bfd_zalloc (abfd, sizeof (*mdata));
 603   if (mdata == NULL)
 604     goto fail;
 605
 606   if (bfd_pef_scan (abfd, &header, mdata))
 607     goto wrong;
 608
 609   return _bfd_no_cleanup;
 610
 611  wrong:
 612   bfd_set_error (bfd_error_wrong_format);
 613
 614  fail:
 615   return NULL;
 616 }
 617
 618 static int
 619 bfd_pef_parse_traceback_tables (bfd *abfd,
 620                                 asection *sec,
 621                                 unsigned char *buf,
 622                                 size_t len,
 623                                 long *nsym,
 624                                 asymbol **csym)
 625 {
 626   char *name;
 627
 628   asymbol function;
 629   asymbol traceback;
 630
 631   const char *const tbprefix = "__traceback_";
 632   size_t tbnamelen;
 633
 634   size_t pos = 0;
 635   unsigned long count = 0;
 636   int ret;
 637
 638   for (;;)
 639     {
 640       /* We're reading symbols two at a time.  */
 641       if (csym && ((csym[count] == NULL) || (csym[count + 1] == NULL)))
 642         break;
 643
 644       pos += 3;
 645       pos -= (pos % 4);
 646
 647       while ((pos + 4) <= len)
 648         {
 649           if (bfd_getb32 (buf + pos) == 0)
 650             break;
 651           pos += 4;
 652         }
 653
 654       if ((pos + 4) > len)
 655         break;
 656
 657       ret = bfd_pef_parse_traceback_table (abfd, sec, buf, len, pos + 4,
 658                                            &function, 0);
 659       if (ret < 0)
 660         {
 661           /* Skip over 0x0L to advance to next possible traceback table.  */
 662           pos += 4;
 663           continue;
 664         }
 665
 666       BFD_ASSERT (function.name != NULL);
 667
 668       /* Don't bother to compute the name if we are just
 669          counting symbols.  */
 670       if (csym)
 671         {
 672           tbnamelen = strlen (tbprefix) + strlen (function.name);
 673           name = bfd_alloc (abfd, tbnamelen + 1);
 674           if (name == NULL)
 675             {
 676               bfd_release (abfd, (void *) function.name);
 677               function.name = NULL;
 678               break;
 679             }
 680           snprintf (name, tbnamelen + 1, "%s%s", tbprefix, function.name);
 681           traceback.name = name;
 682           traceback.value = pos;
 683           traceback.the_bfd = abfd;
 684           traceback.section = sec;
 685           traceback.flags = 0;
 686           traceback.udata.i = ret;
 687
 688           *(csym[count]) = function;
 689           *(csym[count + 1]) = traceback;
 690         }
 691
 692       pos += ret;
 693       count += 2;
 694     }
 695
 696   *nsym = count;
 697   return 0;
 698 }
 699
 700 static int
 701 bfd_pef_parse_function_stub (bfd *abfd ATTRIBUTE_UNUSED,
 702                              unsigned char *buf,
 703                              size_t len,
 704                              unsigned long *offset)
 705 {
 706   BFD_ASSERT (len == 24);
 707
 708   if ((bfd_getb32 (buf) & 0xffff0000) != 0x81820000)
 709     return -1;
 710   if (bfd_getb32 (buf + 4) != 0x90410014)
 711     return -1;
 712   if (bfd_getb32 (buf + 8) != 0x800c0000)
 713     return -1;
 714   if (bfd_getb32 (buf + 12) != 0x804c0004)
 715     return -1;
 716   if (bfd_getb32 (buf + 16) != 0x7c0903a6)
 717     return -1;
 718   if (bfd_getb32 (buf + 20) != 0x4e800420)
 719     return -1;
 720
 721   if (offset != NULL)
 722     *offset = (bfd_getb32 (buf) & 0x0000ffff) / 4;
 723
 724   return 0;
 725 }
 726
 727 static int
 728 bfd_pef_parse_function_stubs (bfd *abfd,
 729                               asection *codesec,
 730                               unsigned char *codebuf,
 731                               size_t codelen,
 732                               unsigned char *loaderbuf,
 733                               size_t loaderlen,
 734                               unsigned long *nsym,
 735                               asymbol **csym)
 736 {
 737   const char *const sprefix = "__stub_";
 738   size_t codepos = 0;
 739   unsigned long count = 0;
 740   bfd_pef_loader_header header;
 741   bfd_pef_imported_library *libraries = NULL;
 742   bfd_pef_imported_symbol *imports = NULL;
 743   unsigned long i;
 744   int ret;
 745
 746   if (loaderlen < 56)
 747     goto error;
 748
 749   ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
 750   if (ret < 0)
 751     goto error;
 752
 753   libraries = bfd_malloc
 754     (header.imported_library_count * sizeof (bfd_pef_imported_library));
 755   imports = bfd_malloc
 756     (header.total_imported_symbol_count * sizeof (bfd_pef_imported_symbol));
 757   if (libraries == NULL || imports == NULL)
 758     goto error;
 759
 760   if (loaderlen < (56 + (header.imported_library_count * 24)))
 761     goto error;
 762   for (i = 0; i < header.imported_library_count; i++)
 763     {
 764       ret = bfd_pef_parse_imported_library
 765         (abfd, loaderbuf + 56 + (i * 24), 24, &libraries[i]);
 766       if (ret < 0)
 767         goto error;
 768     }
 769
 770   if (loaderlen < (56 + (header.imported_library_count * 24)
 771                    + (header.total_imported_symbol_count * 4)))
 772     goto error;
 773   for (i = 0; i < header.total_imported_symbol_count; i++)
 774     {
 775       ret = (bfd_pef_parse_imported_symbol
 776              (abfd,
 777               loaderbuf + 56 + (header.imported_library_count * 24) + (i * 4),
 778               4, &imports[i]));
 779       if (ret < 0)
 780         goto error;
 781     }
 782
 783   codepos = 0;
 784
 785   for (;;)
 786     {
 787       asymbol sym;
 788       const char *symname;
 789       char *name;
 790       unsigned long sym_index;
 791
 792       if (csym && (csym[count] == NULL))
 793         break;
 794
 795       codepos += 3;
 796       codepos -= (codepos % 4);
 797
 798       while ((codepos + 4) <= codelen)
 799         {
 800           if ((bfd_getb32 (codebuf + codepos) & 0xffff0000) == 0x81820000)
 801             break;
 802           codepos += 4;
 803         }
 804
 805       if ((codepos + 24) > codelen)
 806         break;
 807
 808       ret = bfd_pef_parse_function_stub (abfd, codebuf + codepos, 24, &sym_index);
 809       if (ret < 0)
 810         {
 811           codepos += 24;
 812           continue;
 813         }
 814
 815       if (sym_index >= header.total_imported_symbol_count)
 816         {
 817           codepos += 24;
 818           continue;
 819         }
 820
 821       {
 822         size_t max, namelen;
 823         const char *s;
 824
 825         if (loaderlen < (header.loader_strings_offset + imports[sym_index].name))
 826           goto error;
 827
 828         max = loaderlen - (header.loader_strings_offset + imports[sym_index].name);
 829         symname = (char *) loaderbuf;
 830         symname += header.loader_strings_offset + imports[sym_index].name;
 831         namelen = 0;
 832         for (s = symname; s < (symname + max); s++)
 833           {
 834             if (*s == '\0')
 835               break;
 836             if (! ISPRINT (*s))
 837               goto error;
 838             namelen++;
 839           }
 840         if (*s != '\0')
 841           goto error;
 842
 843         name = bfd_alloc (abfd, strlen (sprefix) + namelen + 1);
 844         if (name == NULL)
 845           break;
 846
 847         snprintf (name, strlen (sprefix) + namelen + 1, "%s%s",
 848                   sprefix, symname);
 849         sym.name = name;
 850       }
 851
 852       sym.value = codepos;
 853       sym.the_bfd = abfd;
 854       sym.section = codesec;
 855       sym.flags = 0;
 856       sym.udata.i = 0;
 857
 858       codepos += 24;
 859
 860       if (csym != NULL)
 861         *(csym[count]) = sym;
 862
 863       count++;
 864     }
 865
 866   goto end;
 867
 868  end:
 869   free (libraries);
 870   free (imports);
 871   *nsym = count;
 872   return 0;
 873
 874  error:
 875   free (libraries);
 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       if (bfd_seek (abfd, codesec->filepos, SEEK_SET) != 0)
 899         goto end;
 900       codebuf = _bfd_malloc_and_read (abfd, codelen, codelen);
 901       if (codebuf == NULL)
 902         goto end;
 903     }
 904
 905   loadersec = bfd_get_section_by_name (abfd, "loader");
 906   if (loadersec != NULL)
 907     {
 908       loaderlen = loadersec->size;
 909       if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) != 0)
 910         goto end;
 911       loaderbuf = _bfd_malloc_and_read (abfd, loaderlen, loaderlen);
 912       if (loaderbuf == NULL)
 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   free (codebuf);
 939   free (loaderbuf);
 940   return count;
 941 }
 942
 943 static long
 944 bfd_pef_count_symbols (bfd *abfd)
 945 {
 946   return bfd_pef_parse_symbols (abfd, NULL);
 947 }
 948
 949 static long
 950 bfd_pef_get_symtab_upper_bound (bfd *abfd)
 951 {
 952   long nsyms = bfd_pef_count_symbols (abfd);
 953
 954   if (nsyms < 0)
 955     return nsyms;
 956   return ((nsyms + 1) * sizeof (asymbol *));
 957 }
 958
 959 static long
 960 bfd_pef_canonicalize_symtab (bfd *abfd, asymbol **alocation)
 961 {
 962   long i;
 963   asymbol *syms;
 964   long ret;
 965   long nsyms = bfd_pef_count_symbols (abfd);
 966
 967   if (nsyms < 0)
 968     return nsyms;
 969
 970   syms = bfd_alloc (abfd, nsyms * sizeof (asymbol));
 971   if (syms == NULL)
 972     return -1;
 973
 974   for (i = 0; i < nsyms; i++)
 975     alocation[i] = &syms[i];
 976
 977   alocation[nsyms] = NULL;
 978
 979   ret = bfd_pef_parse_symbols (abfd, alocation);
 980   if (ret != nsyms)
 981     return 0;
 982
 983   return ret;
 984 }
 985
 986 #define bfd_pef_make_empty_symbol _bfd_generic_make_empty_symbol
 987
 988 static void
 989 bfd_pef_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
 990                          asymbol *symbol,
 991                          symbol_info *ret)
 992 {
 993   bfd_symbol_info (symbol, ret);
 994 }
 995
 996 static int
 997 bfd_pef_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
 998                         struct bfd_link_info *info ATTRIBUTE_UNUSED)
 999 {
1000   return 0;
1001 }
1002
1003 const bfd_target pef_vec =
1004 {
1005   "pef",                        /* Name.  */
1006   bfd_target_pef_flavour,       /* Flavour.  */
1007   BFD_ENDIAN_BIG,               /* Byteorder.  */
1008   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1009   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1010    HAS_LINENO | HAS_DEBUG |
1011    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1012   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1013    | SEC_ROM | SEC_HAS_CONTENTS), /* Section_flags.  */
1014   0,                            /* Symbol_leading_char.  */
1015   ' ',                          /* AR_pad_char.  */
1016   16,                           /* AR_max_namelen.  */
1017   0,                            /* match priority.  */
1018   TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
1019   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1020   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1021   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1022   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1023   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1024   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1025   {                             /* bfd_check_format.  */
1026     _bfd_dummy_target,
1027     bfd_pef_object_p,           /* bfd_check_format.  */
1028     _bfd_dummy_target,
1029     _bfd_dummy_target,
1030   },
1031   {                             /* bfd_set_format.  */
1032     _bfd_bool_bfd_false_error,
1033     bfd_pef_mkobject,
1034     _bfd_bool_bfd_false_error,
1035     _bfd_bool_bfd_false_error,
1036   },
1037   {                             /* bfd_write_contents.  */
1038     _bfd_bool_bfd_false_error,
1039     _bfd_bool_bfd_true,
1040     _bfd_bool_bfd_false_error,
1041     _bfd_bool_bfd_false_error,
1042   },
1043
1044   BFD_JUMP_TABLE_GENERIC (bfd_pef),
1045   BFD_JUMP_TABLE_COPY (_bfd_generic),
1046   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1047   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1048   BFD_JUMP_TABLE_SYMBOLS (bfd_pef),
1049   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1050   BFD_JUMP_TABLE_WRITE (bfd_pef),
1051   BFD_JUMP_TABLE_LINK (bfd_pef),
1052   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1053
1054   NULL,
1055
1056   NULL
1057 };
1058
1059 #define bfd_pef_xlib_close_and_cleanup              _bfd_generic_close_and_cleanup
1060 #define bfd_pef_xlib_bfd_free_cached_info           _bfd_generic_bfd_free_cached_info
1061 #define bfd_pef_xlib_new_section_hook               _bfd_generic_new_section_hook
1062 #define bfd_pef_xlib_get_section_contents           _bfd_generic_get_section_contents
1063 #define bfd_pef_xlib_set_section_contents           _bfd_generic_set_section_contents
1064 #define bfd_pef_xlib_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
1065 #define bfd_pef_xlib_set_section_contents_in_window _bfd_generic_set_section_contents_in_window
1066
1067 static int
1068 bfd_pef_xlib_read_header (bfd *abfd, bfd_pef_xlib_header *header)
1069 {
1070   unsigned char buf[80];
1071
1072   bfd_seek (abfd, 0, SEEK_SET);
1073
1074   if (bfd_bread ((void *) buf, sizeof buf, abfd) != sizeof buf)
1075     return -1;
1076
1077   header->tag1 = bfd_getb32 (buf);
1078   header->tag2 = bfd_getb32 (buf + 4);
1079   header->current_format = bfd_getb32 (buf + 8);
1080   header->container_strings_offset = bfd_getb32 (buf + 12);
1081   header->export_hash_offset = bfd_getb32 (buf + 16);
1082   header->export_key_offset = bfd_getb32 (buf + 20);
1083   header->export_symbol_offset = bfd_getb32 (buf + 24);
1084   header->export_names_offset = bfd_getb32 (buf + 28);
1085   header->export_hash_table_power = bfd_getb32 (buf + 32);
1086   header->exported_symbol_count = bfd_getb32 (buf + 36);
1087   header->frag_name_offset = bfd_getb32 (buf + 40);
1088   header->frag_name_length = bfd_getb32 (buf + 44);
1089   header->dylib_path_offset = bfd_getb32 (buf + 48);
1090   header->dylib_path_length = bfd_getb32 (buf + 52);
1091   header->cpu_family = bfd_getb32 (buf + 56);
1092   header->cpu_model = bfd_getb32 (buf + 60);
1093   header->date_time_stamp = bfd_getb32 (buf + 64);
1094   header->current_version = bfd_getb32 (buf + 68);
1095   header->old_definition_version = bfd_getb32 (buf + 72);
1096   header->old_implementation_version = bfd_getb32 (buf + 76);
1097
1098   return 0;
1099 }
1100
1101 static int
1102 bfd_pef_xlib_scan (bfd *abfd, bfd_pef_xlib_header *header)
1103 {
1104   bfd_pef_xlib_data_struct *mdata = NULL;
1105
1106   mdata = bfd_alloc (abfd, sizeof (* mdata));
1107   if (mdata == NULL)
1108     return -1;
1109
1110   mdata->header = *header;
1111
1112   abfd->flags = (abfd->xvec->object_flags
1113                  | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));
1114
1115   abfd->tdata.pef_xlib_data = mdata;
1116
1117   return 0;
1118 }
1119
1120 static bfd_cleanup
1121 bfd_pef_xlib_object_p (bfd *abfd)
1122 {
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_pef_xlib_scan (abfd, &header) != 0)
1140     {
1141       bfd_set_error (bfd_error_wrong_format);
1142       return NULL;
1143     }
1144
1145   return _bfd_no_cleanup;
1146 }
1147
1148 const bfd_target pef_xlib_vec =
1149 {
1150   "pef-xlib",                   /* Name.  */
1151   bfd_target_pef_xlib_flavour,  /* Flavour.  */
1152   BFD_ENDIAN_BIG,               /* Byteorder */
1153   BFD_ENDIAN_BIG,               /* Header_byteorder.  */
1154   (HAS_RELOC | EXEC_P |         /* Object flags.  */
1155    HAS_LINENO | HAS_DEBUG |
1156    HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
1157   (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
1158    | SEC_ROM | SEC_HAS_CONTENTS),/* Section_flags.  */
1159   0,                            /* Symbol_leading_char.  */
1160   ' ',                          /* AR_pad_char.  */
1161   16,                           /* AR_max_namelen.  */
1162   0,                            /* match priority.  */
1163   TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols.  */
1164   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1165   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1166   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Data.  */
1167   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1168   bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1169   bfd_getb16, bfd_getb_signed_16, bfd_putb16,   /* Headers.  */
1170   {                             /* bfd_check_format.  */
1171     _bfd_dummy_target,
1172     bfd_pef_xlib_object_p,      /* bfd_check_format.  */
1173     _bfd_dummy_target,
1174     _bfd_dummy_target,
1175   },
1176   {                             /* bfd_set_format.  */
1177     _bfd_bool_bfd_false_error,
1178     bfd_pef_mkobject,
1179     _bfd_bool_bfd_false_error,
1180     _bfd_bool_bfd_false_error,
1181   },
1182   {                             /* bfd_write_contents.  */
1183     _bfd_bool_bfd_false_error,
1184     _bfd_bool_bfd_true,
1185     _bfd_bool_bfd_false_error,
1186     _bfd_bool_bfd_false_error,
1187   },
1188
1189   BFD_JUMP_TABLE_GENERIC (bfd_pef_xlib),
1190   BFD_JUMP_TABLE_COPY (_bfd_generic),
1191   BFD_JUMP_TABLE_CORE (_bfd_nocore),
1192   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
1193   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
1194   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
1195   BFD_JUMP_TABLE_WRITE (_bfd_nowrite),
1196   BFD_JUMP_TABLE_LINK (_bfd_nolink),
1197   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1198
1199   NULL,
1200
1201   NULL
1202 };