lib/Object/COFFObjectFile.cpp

   1 //===- COFFObjectFile.cpp - COFF object file implementation -----*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file declares the COFFObjectFile class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Object/COFF.h"
  15 #include "llvm/ADT/SmallString.h"
  16 #include "llvm/ADT/StringSwitch.h"
  17 #include "llvm/ADT/Triple.h"
  18
  19 using namespace llvm;
  20 using namespace object;
  21
  22 namespace {
  23 using support::ulittle8_t;
  24 using support::ulittle16_t;
  25 using support::ulittle32_t;
  26 using support::little16_t;
  27 }
  28
  29 namespace {
  30 // Returns false if size is greater than the buffer size. And sets ec.
  31 bool checkSize(const MemoryBuffer *m, error_code &ec, uint64_t size) {
  32   if (m->getBufferSize() < size) {
  33     ec = object_error::unexpected_eof;
  34     return false;
  35   }
  36   return true;
  37 }
  38
  39 // Returns false if any bytes in [addr, addr + size) fall outsize of m.
  40 bool checkAddr(const MemoryBuffer *m,
  41                error_code &ec,
  42                uintptr_t addr,
  43                uint64_t size) {
  44   if (addr + size < addr ||
  45       addr + size < size ||
  46       addr + size > uintptr_t(m->getBufferEnd())) {
  47     ec = object_error::unexpected_eof;
  48     return false;
  49   }
  50   return true;
  51 }
  52 }
  53
  54 const coff_symbol *COFFObjectFile::toSymb(DataRefImpl Symb) const {
  55   const coff_symbol *addr = reinterpret_cast<const coff_symbol*>(Symb.p);
  56
  57 # ifndef NDEBUG
  58   // Verify that the symbol points to a valid entry in the symbol table.
  59   uintptr_t offset = uintptr_t(addr) - uintptr_t(base());
  60   if (offset < Header->PointerToSymbolTable
  61       || offset >= Header->PointerToSymbolTable
  62          + (Header->NumberOfSymbols * sizeof(coff_symbol)))
  63     report_fatal_error("Symbol was outside of symbol table.");
  64
  65   assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol)
  66          == 0 && "Symbol did not point to the beginning of a symbol");
  67 # endif
  68
  69   return addr;
  70 }
  71
  72 const coff_section *COFFObjectFile::toSec(DataRefImpl Sec) const {
  73   const coff_section *addr = reinterpret_cast<const coff_section*>(Sec.p);
  74
  75 # ifndef NDEBUG
  76   // Verify that the section points to a valid entry in the section table.
  77   if (addr < SectionTable
  78       || addr >= (SectionTable + Header->NumberOfSections))
  79     report_fatal_error("Section was outside of section table.");
  80
  81   uintptr_t offset = uintptr_t(addr) - uintptr_t(SectionTable);
  82   assert(offset % sizeof(coff_section) == 0 &&
  83          "Section did not point to the beginning of a section");
  84 # endif
  85
  86   return addr;
  87 }
  88
  89 error_code COFFObjectFile::getSymbolNext(DataRefImpl Symb,
  90                                          SymbolRef &Result) const {
  91   const coff_symbol *symb = toSymb(Symb);
  92   symb += 1 + symb->NumberOfAuxSymbols;
  93   Symb.p = reinterpret_cast<uintptr_t>(symb);
  94   Result = SymbolRef(Symb, this);
  95   return object_error::success;
  96 }
  97
  98  error_code COFFObjectFile::getSymbolName(DataRefImpl Symb,
  99                                           StringRef &Result) const {
 100   const coff_symbol *symb = toSymb(Symb);
 101   return getSymbolName(symb, Result);
 102 }
 103
 104 error_code COFFObjectFile::getSymbolOffset(DataRefImpl Symb,
 105                                             uint64_t &Result) const {
 106   const coff_symbol *symb = toSymb(Symb);
 107   const coff_section *Section = NULL;
 108   if (error_code ec = getSection(symb->SectionNumber, Section))
 109     return ec;
 110   char Type;
 111   if (error_code ec = getSymbolNMTypeChar(Symb, Type))
 112     return ec;
 113   if (Type == 'U' || Type == 'w')
 114     Result = UnknownAddressOrSize;
 115   else if (Section)
 116     Result = Section->VirtualAddress + symb->Value;
 117   else
 118     Result = symb->Value;
 119   return object_error::success;
 120 }
 121
 122 error_code COFFObjectFile::getSymbolAddress(DataRefImpl Symb,
 123                                             uint64_t &Result) const {
 124   const coff_symbol *symb = toSymb(Symb);
 125   const coff_section *Section = NULL;
 126   if (error_code ec = getSection(symb->SectionNumber, Section))
 127     return ec;
 128   char Type;
 129   if (error_code ec = getSymbolNMTypeChar(Symb, Type))
 130     return ec;
 131   if (Type == 'U' || Type == 'w')
 132     Result = UnknownAddressOrSize;
 133   else if (Section)
 134     Result = reinterpret_cast<uintptr_t>(base() +
 135                                          Section->PointerToRawData +
 136                                          symb->Value);
 137   else
 138     Result = reinterpret_cast<uintptr_t>(base() + symb->Value);
 139   return object_error::success;
 140 }
 141
 142 error_code COFFObjectFile::getSymbolType(DataRefImpl Symb,
 143                                          SymbolRef::Type &Result) const {
 144   const coff_symbol *symb = toSymb(Symb);
 145   Result = SymbolRef::ST_Other;
 146   if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL &&
 147       symb->SectionNumber == COFF::IMAGE_SYM_UNDEFINED) {
 148     Result = SymbolRef::ST_External;
 149   } else {
 150     if (symb->Type.ComplexType == COFF::IMAGE_SYM_DTYPE_FUNCTION) {
 151       Result = SymbolRef::ST_Function;
 152     } else {
 153       char Type;
 154       if (error_code ec = getSymbolNMTypeChar(Symb, Type))
 155         return ec;
 156       if (Type == 'r' || Type == 'R') {
 157         Result = SymbolRef::ST_Data;
 158       }
 159     }
 160   }
 161   return object_error::success;
 162 }
 163
 164 error_code COFFObjectFile::isSymbolGlobal(DataRefImpl Symb,
 165                                           bool &Result) const {
 166   const coff_symbol *symb = toSymb(Symb);
 167   Result = (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL);
 168   return object_error::success;
 169 }
 170
 171 error_code COFFObjectFile::getSymbolSize(DataRefImpl Symb,
 172                                          uint64_t &Result) const {
 173   // FIXME: Return the correct size. This requires looking at all the symbols
 174   //        in the same section as this symbol, and looking for either the next
 175   //        symbol, or the end of the section.
 176   const coff_symbol *symb = toSymb(Symb);
 177   const coff_section *Section = NULL;
 178   if (error_code ec = getSection(symb->SectionNumber, Section))
 179     return ec;
 180   char Type;
 181   if (error_code ec = getSymbolNMTypeChar(Symb, Type))
 182     return ec;
 183   if (Type == 'U' || Type == 'w')
 184     Result = UnknownAddressOrSize;
 185   else if (Section)
 186     Result = Section->SizeOfRawData - symb->Value;
 187   else
 188     Result = 0;
 189   return object_error::success;
 190 }
 191
 192 error_code COFFObjectFile::getSymbolNMTypeChar(DataRefImpl Symb,
 193                                                char &Result) const {
 194   const coff_symbol *symb = toSymb(Symb);
 195   StringRef name;
 196   if (error_code ec = getSymbolName(Symb, name))
 197     return ec;
 198   char ret = StringSwitch<char>(name)
 199     .StartsWith(".debug", 'N')
 200     .StartsWith(".sxdata", 'N')
 201     .Default('?');
 202
 203   if (ret != '?') {
 204     Result = ret;
 205     return object_error::success;
 206   }
 207
 208   uint32_t Characteristics = 0;
 209   if (symb->SectionNumber > 0) {
 210     const coff_section *Section = NULL;
 211     if (error_code ec = getSection(symb->SectionNumber, Section))
 212       return ec;
 213     Characteristics = Section->Characteristics;
 214   }
 215
 216   switch (symb->SectionNumber) {
 217   case COFF::IMAGE_SYM_UNDEFINED:
 218     // Check storage classes.
 219     if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL) {
 220       Result = 'w';
 221       return object_error::success; // Don't do ::toupper.
 222     } else
 223       ret = 'u';
 224     break;
 225   case COFF::IMAGE_SYM_ABSOLUTE:
 226     ret = 'a';
 227     break;
 228   case COFF::IMAGE_SYM_DEBUG:
 229     ret = 'n';
 230     break;
 231   default:
 232     // Check section type.
 233     if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
 234       ret = 't';
 235     else if (  Characteristics & COFF::IMAGE_SCN_MEM_READ
 236             && ~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only.
 237       ret = 'r';
 238     else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
 239       ret = 'd';
 240     else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
 241       ret = 'b';
 242     else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
 243       ret = 'i';
 244
 245     // Check for section symbol.
 246     else if (  symb->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC
 247             && symb->Value == 0)
 248        ret = 's';
 249   }
 250
 251   if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL)
 252     ret = ::toupper(ret);
 253
 254   Result = ret;
 255   return object_error::success;
 256 }
 257
 258 error_code COFFObjectFile::isSymbolInternal(DataRefImpl Symb,
 259                                             bool &Result) const {
 260   Result = false;
 261   return object_error::success;
 262 }
 263
 264 error_code COFFObjectFile::getSectionNext(DataRefImpl Sec,
 265                                           SectionRef &Result) const {
 266   const coff_section *sec = toSec(Sec);
 267   sec += 1;
 268   Sec.p = reinterpret_cast<uintptr_t>(sec);
 269   Result = SectionRef(Sec, this);
 270   return object_error::success;
 271 }
 272
 273 error_code COFFObjectFile::getSectionName(DataRefImpl Sec,
 274                                           StringRef &Result) const {
 275   const coff_section *sec = toSec(Sec);
 276   StringRef name;
 277   if (sec->Name[7] == 0)
 278     // Null terminated, let ::strlen figure out the length.
 279     name = sec->Name;
 280   else
 281     // Not null terminated, use all 8 bytes.
 282     name = StringRef(sec->Name, 8);
 283
 284   // Check for string table entry. First byte is '/'.
 285   if (name[0] == '/') {
 286     uint32_t Offset;
 287     name.substr(1).getAsInteger(10, Offset);
 288     if (error_code ec = getString(Offset, name))
 289       return ec;
 290   }
 291
 292   Result = name;
 293   return object_error::success;
 294 }
 295
 296 error_code COFFObjectFile::getSectionAddress(DataRefImpl Sec,
 297                                              uint64_t &Result) const {
 298   const coff_section *sec = toSec(Sec);
 299   Result = sec->VirtualAddress;
 300   return object_error::success;
 301 }
 302
 303 error_code COFFObjectFile::getSectionSize(DataRefImpl Sec,
 304                                           uint64_t &Result) const {
 305   const coff_section *sec = toSec(Sec);
 306   Result = sec->SizeOfRawData;
 307   return object_error::success;
 308 }
 309
 310 error_code COFFObjectFile::getSectionContents(DataRefImpl Sec,
 311                                               StringRef &Result) const {
 312   const coff_section *sec = toSec(Sec);
 313   // The only thing that we need to verify is that the contents is contained
 314   // within the file bounds. We don't need to make sure it doesn't cover other
 315   // data, as there's nothing that says that is not allowed.
 316   uintptr_t con_start = uintptr_t(base()) + sec->PointerToRawData;
 317   uintptr_t con_end = con_start + sec->SizeOfRawData;
 318   if (con_end >= uintptr_t(Data->getBufferEnd()))
 319     return object_error::parse_failed;
 320   Result = StringRef(reinterpret_cast<const char*>(con_start),
 321                      sec->SizeOfRawData);
 322   return object_error::success;
 323 }
 324
 325 error_code COFFObjectFile::getSectionAlignment(DataRefImpl Sec,
 326                                                uint64_t &Res) const {
 327   const coff_section *sec = toSec(Sec);
 328   if (!sec)
 329     return object_error::parse_failed;
 330   Res = uint64_t(1) << (((sec->Characteristics & 0x00F00000) >> 20) - 1);
 331   return object_error::success;
 332 }
 333
 334 error_code COFFObjectFile::isSectionText(DataRefImpl Sec,
 335                                          bool &Result) const {
 336   const coff_section *sec = toSec(Sec);
 337   Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
 338   return object_error::success;
 339 }
 340
 341 error_code COFFObjectFile::isSectionData(DataRefImpl Sec,
 342                                          bool &Result) const {
 343   const coff_section *sec = toSec(Sec);
 344   Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
 345   return object_error::success;
 346 }
 347
 348 error_code COFFObjectFile::isSectionBSS(DataRefImpl Sec,
 349                                         bool &Result) const {
 350   const coff_section *sec = toSec(Sec);
 351   Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
 352   return object_error::success;
 353 }
 354
 355 error_code COFFObjectFile::sectionContainsSymbol(DataRefImpl Sec,
 356                                                  DataRefImpl Symb,
 357                                                  bool &Result) const {
 358   const coff_section *sec = toSec(Sec);
 359   const coff_symbol *symb = toSymb(Symb);
 360   const coff_section *symb_sec;
 361   if (error_code ec = getSection(symb->SectionNumber, symb_sec)) return ec;
 362   if (symb_sec == sec)
 363     Result = true;
 364   else
 365     Result = false;
 366   return object_error::success;
 367 }
 368
 369 relocation_iterator COFFObjectFile::getSectionRelBegin(DataRefImpl Sec) const {
 370   const coff_section *sec = toSec(Sec);
 371   DataRefImpl ret;
 372   std::memset(&ret, 0, sizeof(ret));
 373   if (sec->NumberOfRelocations == 0)
 374     ret.p = 0;
 375   else
 376     ret.p = reinterpret_cast<uintptr_t>(base() + sec->PointerToRelocations);
 377
 378   return relocation_iterator(RelocationRef(ret, this));
 379 }
 380
 381 relocation_iterator COFFObjectFile::getSectionRelEnd(DataRefImpl Sec) const {
 382   const coff_section *sec = toSec(Sec);
 383   DataRefImpl ret;
 384   std::memset(&ret, 0, sizeof(ret));
 385   if (sec->NumberOfRelocations == 0)
 386     ret.p = 0;
 387   else
 388     ret.p = reinterpret_cast<uintptr_t>(
 389               reinterpret_cast<const coff_relocation*>(
 390                 base() + sec->PointerToRelocations)
 391               + sec->NumberOfRelocations);
 392
 393   return relocation_iterator(RelocationRef(ret, this));
 394 }
 395
 396 COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
 397   : ObjectFile(Binary::isCOFF, Object, ec) {
 398   // Check that we at least have enough room for a header.
 399   if (!checkSize(Data, ec, sizeof(coff_file_header))) return;
 400
 401   // The actual starting location of the COFF header in the file. This can be
 402   // non-zero in PE/COFF files.
 403   uint64_t HeaderStart = 0;
 404
 405   // Check if this is a PE/COFF file.
 406   if (base()[0] == 0x4d && base()[1] == 0x5a) {
 407     // PE/COFF, seek through MS-DOS compatibility stub and 4-byte
 408     // PE signature to find 'normal' COFF header.
 409     if (!checkSize(Data, ec, 0x3c + 8)) return;
 410     HeaderStart += *reinterpret_cast<const ulittle32_t *>(base() + 0x3c);
 411     // Check the PE header. ("PE\0\0")
 412     if (std::memcmp(base() + HeaderStart, "PE\0\0", 4) != 0) {
 413       ec = object_error::parse_failed;
 414       return;
 415     }
 416     HeaderStart += 4; // Skip the PE Header.
 417   }
 418
 419   Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart);
 420   if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header)))
 421     return;
 422
 423   SectionTable =
 424     reinterpret_cast<const coff_section *>( base()
 425                                           + HeaderStart
 426                                           + sizeof(coff_file_header)
 427                                           + Header->SizeOfOptionalHeader);
 428   if (!checkAddr(Data, ec, uintptr_t(SectionTable),
 429                  Header->NumberOfSections * sizeof(coff_section)))
 430     return;
 431
 432   SymbolTable =
 433     reinterpret_cast<const coff_symbol *>(base()
 434                                           + Header->PointerToSymbolTable);
 435   if (!checkAddr(Data, ec, uintptr_t(SymbolTable),
 436                  Header->NumberOfSymbols * sizeof(coff_symbol)))
 437     return;
 438
 439   // Find string table.
 440   StringTable = reinterpret_cast<const char *>(base())
 441                 + Header->PointerToSymbolTable
 442                 + Header->NumberOfSymbols * sizeof(coff_symbol);
 443   if (!checkAddr(Data, ec, uintptr_t(StringTable), sizeof(ulittle32_t)))
 444     return;
 445
 446   StringTableSize = *reinterpret_cast<const ulittle32_t *>(StringTable);
 447   if (!checkAddr(Data, ec, uintptr_t(StringTable), StringTableSize))
 448     return;
 449   // Check that the string table is null terminated if has any in it.
 450   if (StringTableSize < 4
 451       || (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)) {
 452     ec = object_error::parse_failed;
 453     return;
 454   }
 455
 456   ec = object_error::success;
 457 }
 458
 459 symbol_iterator COFFObjectFile::begin_symbols() const {
 460   DataRefImpl ret;
 461   std::memset(&ret, 0, sizeof(DataRefImpl));
 462   ret.p = reinterpret_cast<intptr_t>(SymbolTable);
 463   return symbol_iterator(SymbolRef(ret, this));
 464 }
 465
 466 symbol_iterator COFFObjectFile::end_symbols() const {
 467   // The symbol table ends where the string table begins.
 468   DataRefImpl ret;
 469   std::memset(&ret, 0, sizeof(DataRefImpl));
 470   ret.p = reinterpret_cast<intptr_t>(StringTable);
 471   return symbol_iterator(SymbolRef(ret, this));
 472 }
 473
 474 section_iterator COFFObjectFile::begin_sections() const {
 475   DataRefImpl ret;
 476   std::memset(&ret, 0, sizeof(DataRefImpl));
 477   ret.p = reinterpret_cast<intptr_t>(SectionTable);
 478   return section_iterator(SectionRef(ret, this));
 479 }
 480
 481 section_iterator COFFObjectFile::end_sections() const {
 482   DataRefImpl ret;
 483   std::memset(&ret, 0, sizeof(DataRefImpl));
 484   ret.p = reinterpret_cast<intptr_t>(SectionTable + Header->NumberOfSections);
 485   return section_iterator(SectionRef(ret, this));
 486 }
 487
 488 uint8_t COFFObjectFile::getBytesInAddress() const {
 489   return getArch() == Triple::x86_64 ? 8 : 4;
 490 }
 491
 492 StringRef COFFObjectFile::getFileFormatName() const {
 493   switch(Header->Machine) {
 494   case COFF::IMAGE_FILE_MACHINE_I386:
 495     return "COFF-i386";
 496   case COFF::IMAGE_FILE_MACHINE_AMD64:
 497     return "COFF-x86-64";
 498   default:
 499     return "COFF-<unknown arch>";
 500   }
 501 }
 502
 503 unsigned COFFObjectFile::getArch() const {
 504   switch(Header->Machine) {
 505   case COFF::IMAGE_FILE_MACHINE_I386:
 506     return Triple::x86;
 507   case COFF::IMAGE_FILE_MACHINE_AMD64:
 508     return Triple::x86_64;
 509   default:
 510     return Triple::UnknownArch;
 511   }
 512 }
 513
 514 error_code COFFObjectFile::getHeader(const coff_file_header *&Res) const {
 515   Res = Header;
 516   return object_error::success;
 517 }
 518
 519 error_code COFFObjectFile::getSection(int32_t index,
 520                                       const coff_section *&Result) const {
 521   // Check for special index values.
 522   if (index == COFF::IMAGE_SYM_UNDEFINED ||
 523       index == COFF::IMAGE_SYM_ABSOLUTE ||
 524       index == COFF::IMAGE_SYM_DEBUG)
 525     Result = NULL;
 526   else if (index > 0 && index <= Header->NumberOfSections)
 527     // We already verified the section table data, so no need to check again.
 528     Result = SectionTable + (index - 1);
 529   else
 530     return object_error::parse_failed;
 531   return object_error::success;
 532 }
 533
 534 error_code COFFObjectFile::getString(uint32_t offset,
 535                                      StringRef &Result) const {
 536   if (StringTableSize <= 4)
 537     // Tried to get a string from an empty string table.
 538     return object_error::parse_failed;
 539   if (offset >= StringTableSize)
 540     return object_error::unexpected_eof;
 541   Result = StringRef(StringTable + offset);
 542   return object_error::success;
 543 }
 544
 545 error_code COFFObjectFile::getSymbol(uint32_t index,
 546                                      const coff_symbol *&Result) const {
 547   if (index >= 0 && index < Header->NumberOfSymbols)
 548     Result = SymbolTable + index;
 549   else
 550     return object_error::parse_failed;
 551   return object_error::success;
 552 }
 553
 554 error_code COFFObjectFile::getSymbolName(const coff_symbol *symbol,
 555                                          StringRef &Res) const {
 556   // Check for string table entry. First 4 bytes are 0.
 557   if (symbol->Name.Offset.Zeroes == 0) {
 558     uint32_t Offset = symbol->Name.Offset.Offset;
 559     if (error_code ec = getString(Offset, Res))
 560       return ec;
 561     return object_error::success;
 562   }
 563
 564   if (symbol->Name.ShortName[7] == 0)
 565     // Null terminated, let ::strlen figure out the length.
 566     Res = StringRef(symbol->Name.ShortName);
 567   else
 568     // Not null terminated, use all 8 bytes.
 569     Res = StringRef(symbol->Name.ShortName, 8);
 570   return object_error::success;
 571 }
 572
 573 const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
 574   return reinterpret_cast<const coff_relocation*>(Rel.p);
 575 }
 576 error_code COFFObjectFile::getRelocationNext(DataRefImpl Rel,
 577                                              RelocationRef &Res) const {
 578   Rel.p = reinterpret_cast<uintptr_t>(
 579             reinterpret_cast<const coff_relocation*>(Rel.p) + 1);
 580   Res = RelocationRef(Rel, this);
 581   return object_error::success;
 582 }
 583 error_code COFFObjectFile::getRelocationAddress(DataRefImpl Rel,
 584                                                 uint64_t &Res) const {
 585   Res = toRel(Rel)->VirtualAddress;
 586   return object_error::success;
 587 }
 588 error_code COFFObjectFile::getRelocationSymbol(DataRefImpl Rel,
 589                                                SymbolRef &Res) const {
 590   const coff_relocation* R = toRel(Rel);
 591   DataRefImpl Symb;
 592   Symb.p = reinterpret_cast<uintptr_t>(SymbolTable + R->SymbolTableIndex);
 593   Res = SymbolRef(Symb, this);
 594   return object_error::success;
 595 }
 596 error_code COFFObjectFile::getRelocationType(DataRefImpl Rel,
 597                                              uint32_t &Res) const {
 598   const coff_relocation* R = toRel(Rel);
 599   Res = R->Type;
 600   return object_error::success;
 601 }
 602
 603 #define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(enum) \
 604   case COFF::enum: res = #enum; break;
 605
 606 error_code COFFObjectFile::getRelocationTypeName(DataRefImpl Rel,
 607                                           SmallVectorImpl<char> &Result) const {
 608   const coff_relocation *reloc = toRel(Rel);
 609   StringRef res;
 610   switch (Header->Machine) {
 611   case COFF::IMAGE_FILE_MACHINE_AMD64:
 612     switch (reloc->Type) {
 613     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE);
 614     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR64);
 615     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32);
 616     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32NB);
 617     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32);
 618     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_1);
 619     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_2);
 620     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_3);
 621     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_4);
 622     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_5);
 623     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECTION);
 624     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL);
 625     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL7);
 626     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_TOKEN);
 627     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SREL32);
 628     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_PAIR);
 629     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SSPAN32);
 630     default:
 631       res = "Unknown";
 632     }
 633     break;
 634   case COFF::IMAGE_FILE_MACHINE_I386:
 635     switch (reloc->Type) {
 636     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_ABSOLUTE);
 637     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR16);
 638     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL16);
 639     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32);
 640     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32NB);
 641     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SEG12);
 642     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECTION);
 643     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL);
 644     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_TOKEN);
 645     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL7);
 646     LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL32);
 647     default:
 648       res = "Unknown";
 649     }
 650     break;
 651   default:
 652     res = "Unknown";
 653   }
 654   Result.append(res.begin(), res.end());
 655   return object_error::success;
 656 }
 657
 658 #undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME
 659
 660 error_code COFFObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel,
 661                                                        int64_t &Res) const {
 662   Res = 0;
 663   return object_error::success;
 664 }
 665 error_code COFFObjectFile::getRelocationValueString(DataRefImpl Rel,
 666                                           SmallVectorImpl<char> &Result) const {
 667   const coff_relocation *reloc = toRel(Rel);
 668   const coff_symbol *symb = 0;
 669   if (error_code ec = getSymbol(reloc->SymbolTableIndex, symb)) return ec;
 670   DataRefImpl sym;
 671   ::memset(&sym, 0, sizeof(sym));
 672   sym.p = reinterpret_cast<uintptr_t>(symb);
 673   StringRef symname;
 674   if (error_code ec = getSymbolName(sym, symname)) return ec;
 675   Result.append(symname.begin(), symname.end());
 676   return object_error::success;
 677 }
 678
 679 namespace llvm {
 680
 681   ObjectFile *ObjectFile::createCOFFObjectFile(MemoryBuffer *Object) {
 682     error_code ec;
 683     return new COFFObjectFile(Object, ec);
 684   }
 685
 686 } // end namespace llvm