COFFObjectFile.cpp revision 3fd9b8422328a60664a5c631ec9519b58017fcbc 
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/ArrayRef.h"
16#include "llvm/ADT/SmallString.h"
17#include "llvm/ADT/StringSwitch.h"
18#include "llvm/ADT/Triple.h"
19
20using namespace llvm;
21using namespace object;
22
23namespace {
24using support::ulittle8_t;
25using support::ulittle16_t;
26using support::ulittle32_t;
27using support::little16_t;
28}
29
30namespace {
31// Returns false if size is greater than the buffer size. And sets ec.
32bool checkSize(const MemoryBuffer *m, error_code &ec, uint64_t size) {
33  if (m->getBufferSize() < size) {
34    ec = object_error::unexpected_eof;
35    return false;
36  }
37  return true;
38}
39
40// Returns false if any bytes in [addr, addr + size) fall outsize of m.
41bool checkAddr(const MemoryBuffer *m,
42               error_code &ec,
43               uintptr_t addr,
44               uint64_t size) {
45  if (addr + size < addr ||
46      addr + size < size ||
47      addr + size > uintptr_t(m->getBufferEnd())) {
48    ec = object_error::unexpected_eof;
49    return false;
50  }
51  return true;
52}
53}
54
55const coff_symbol *COFFObjectFile::toSymb(DataRefImpl Symb) const {
56  const coff_symbol *addr = reinterpret_cast<const coff_symbol*>(Symb.p);
57
58# ifndef NDEBUG
59  // Verify that the symbol points to a valid entry in the symbol table.
60  uintptr_t offset = uintptr_t(addr) - uintptr_t(base());
61  if (offset < Header->PointerToSymbolTable
62      || offset >= Header->PointerToSymbolTable
63         + (Header->NumberOfSymbols * sizeof(coff_symbol)))
64    report_fatal_error("Symbol was outside of symbol table.");
65
66  assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol)
67         == 0 && "Symbol did not point to the beginning of a symbol");
68# endif
69
70  return addr;
71}
72
73const coff_section *COFFObjectFile::toSec(DataRefImpl Sec) const {
74  const coff_section *addr = reinterpret_cast<const coff_section*>(Sec.p);
75
76# ifndef NDEBUG
77  // Verify that the section points to a valid entry in the section table.
78  if (addr < SectionTable
79      || addr >= (SectionTable + Header->NumberOfSections))
80    report_fatal_error("Section was outside of section table.");
81
82  uintptr_t offset = uintptr_t(addr) - uintptr_t(SectionTable);
83  assert(offset % sizeof(coff_section) == 0 &&
84         "Section did not point to the beginning of a section");
85# endif
86
87  return addr;
88}
89
90error_code COFFObjectFile::getSymbolNext(DataRefImpl Symb,
91                                         SymbolRef &Result) const {
92  const coff_symbol *symb = toSymb(Symb);
93  symb += 1 + symb->NumberOfAuxSymbols;
94  Symb.p = reinterpret_cast<uintptr_t>(symb);
95  Result = SymbolRef(Symb, this);
96  return object_error::success;
97}
98
99 error_code COFFObjectFile::getSymbolName(DataRefImpl Symb,
100                                          StringRef &Result) const {
101  const coff_symbol *symb = toSymb(Symb);
102  return getSymbolName(symb, Result);
103}
104
105error_code COFFObjectFile::getSymbolFileOffset(DataRefImpl Symb,
106                                            uint64_t &Result) const {
107  const coff_symbol *symb = toSymb(Symb);
108  const coff_section *Section = NULL;
109  if (error_code ec = getSection(symb->SectionNumber, Section))
110    return ec;
111  char Type;
112  if (error_code ec = getSymbolNMTypeChar(Symb, Type))
113    return ec;
114  if (Type == 'U' || Type == 'w')
115    Result = UnknownAddressOrSize;
116  else if (Section)
117    Result = Section->PointerToRawData + symb->Value;
118  else
119    Result = symb->Value;
120  return object_error::success;
121}
122
123error_code COFFObjectFile::getSymbolAddress(DataRefImpl Symb,
124                                            uint64_t &Result) const {
125  const coff_symbol *symb = toSymb(Symb);
126  const coff_section *Section = NULL;
127  if (error_code ec = getSection(symb->SectionNumber, Section))
128    return ec;
129  char Type;
130  if (error_code ec = getSymbolNMTypeChar(Symb, Type))
131    return ec;
132  if (Type == 'U' || Type == 'w')
133    Result = UnknownAddressOrSize;
134  else if (Section)
135    Result = Section->VirtualAddress + symb->Value;
136  else
137    Result = symb->Value;
138  return object_error::success;
139}
140
141error_code COFFObjectFile::getSymbolType(DataRefImpl Symb,
142                                         SymbolRef::Type &Result) const {
143  const coff_symbol *symb = toSymb(Symb);
144  Result = SymbolRef::ST_Other;
145  if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL &&
146      symb->SectionNumber == COFF::IMAGE_SYM_UNDEFINED) {
147    Result = SymbolRef::ST_Unknown;
148  } else {
149    if (symb->getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION) {
150      Result = SymbolRef::ST_Function;
151    } else {
152      char Type;
153      if (error_code ec = getSymbolNMTypeChar(Symb, Type))
154        return ec;
155      if (Type == 'r' || Type == 'R') {
156        Result = SymbolRef::ST_Data;
157      }
158    }
159  }
160  return object_error::success;
161}
162
163error_code COFFObjectFile::getSymbolFlags(DataRefImpl Symb,
164                                          uint32_t &Result) const {
165  const coff_symbol *symb = toSymb(Symb);
166  Result = SymbolRef::SF_None;
167
168  // TODO: Correctly set SF_FormatSpecific, SF_ThreadLocal, SF_Common
169
170  if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL &&
171      symb->SectionNumber == COFF::IMAGE_SYM_UNDEFINED)
172    Result |= SymbolRef::SF_Undefined;
173
174  // TODO: This are certainly too restrictive.
175  if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL)
176    Result |= SymbolRef::SF_Global;
177
178  if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL)
179    Result |= SymbolRef::SF_Weak;
180
181  if (symb->SectionNumber == COFF::IMAGE_SYM_ABSOLUTE)
182    Result |= SymbolRef::SF_Absolute;
183
184  return object_error::success;
185}
186
187error_code COFFObjectFile::getSymbolSize(DataRefImpl Symb,
188                                         uint64_t &Result) const {
189  // FIXME: Return the correct size. This requires looking at all the symbols
190  //        in the same section as this symbol, and looking for either the next
191  //        symbol, or the end of the section.
192  const coff_symbol *symb = toSymb(Symb);
193  const coff_section *Section = NULL;
194  if (error_code ec = getSection(symb->SectionNumber, Section))
195    return ec;
196  char Type;
197  if (error_code ec = getSymbolNMTypeChar(Symb, Type))
198    return ec;
199  if (Type == 'U' || Type == 'w')
200    Result = UnknownAddressOrSize;
201  else if (Section)
202    Result = Section->SizeOfRawData - symb->Value;
203  else
204    Result = 0;
205  return object_error::success;
206}
207
208error_code COFFObjectFile::getSymbolNMTypeChar(DataRefImpl Symb,
209                                               char &Result) const {
210  const coff_symbol *symb = toSymb(Symb);
211  StringRef name;
212  if (error_code ec = getSymbolName(Symb, name))
213    return ec;
214  char ret = StringSwitch<char>(name)
215    .StartsWith(".debug", 'N')
216    .StartsWith(".sxdata", 'N')
217    .Default('?');
218
219  if (ret != '?') {
220    Result = ret;
221    return object_error::success;
222  }
223
224  uint32_t Characteristics = 0;
225  if (symb->SectionNumber > 0) {
226    const coff_section *Section = NULL;
227    if (error_code ec = getSection(symb->SectionNumber, Section))
228      return ec;
229    Characteristics = Section->Characteristics;
230  }
231
232  switch (symb->SectionNumber) {
233  case COFF::IMAGE_SYM_UNDEFINED:
234    // Check storage classes.
235    if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL) {
236      Result = 'w';
237      return object_error::success; // Don't do ::toupper.
238    } else if (symb->Value != 0) // Check for common symbols.
239      ret = 'c';
240    else
241      ret = 'u';
242    break;
243  case COFF::IMAGE_SYM_ABSOLUTE:
244    ret = 'a';
245    break;
246  case COFF::IMAGE_SYM_DEBUG:
247    ret = 'n';
248    break;
249  default:
250    // Check section type.
251    if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
252      ret = 't';
253    else if (  Characteristics & COFF::IMAGE_SCN_MEM_READ
254            && ~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only.
255      ret = 'r';
256    else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
257      ret = 'd';
258    else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
259      ret = 'b';
260    else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
261      ret = 'i';
262
263    // Check for section symbol.
264    else if (  symb->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC
265            && symb->Value == 0)
266       ret = 's';
267  }
268
269  if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL)
270    ret = ::toupper(ret);
271
272  Result = ret;
273  return object_error::success;
274}
275
276error_code COFFObjectFile::getSymbolSection(DataRefImpl Symb,
277                                            section_iterator &Result) const {
278  const coff_symbol *symb = toSymb(Symb);
279  if (symb->SectionNumber <= COFF::IMAGE_SYM_UNDEFINED)
280    Result = end_sections();
281  else {
282    const coff_section *sec = 0;
283    if (error_code ec = getSection(symb->SectionNumber, sec)) return ec;
284    DataRefImpl Sec;
285    Sec.p = reinterpret_cast<uintptr_t>(sec);
286    Result = section_iterator(SectionRef(Sec, this));
287  }
288  return object_error::success;
289}
290
291error_code COFFObjectFile::getSectionNext(DataRefImpl Sec,
292                                          SectionRef &Result) const {
293  const coff_section *sec = toSec(Sec);
294  sec += 1;
295  Sec.p = reinterpret_cast<uintptr_t>(sec);
296  Result = SectionRef(Sec, this);
297  return object_error::success;
298}
299
300error_code COFFObjectFile::getSectionName(DataRefImpl Sec,
301                                          StringRef &Result) const {
302  const coff_section *sec = toSec(Sec);
303  return getSectionName(sec, Result);
304}
305
306error_code COFFObjectFile::getSectionAddress(DataRefImpl Sec,
307                                             uint64_t &Result) const {
308  const coff_section *sec = toSec(Sec);
309  Result = sec->VirtualAddress;
310  return object_error::success;
311}
312
313error_code COFFObjectFile::getSectionSize(DataRefImpl Sec,
314                                          uint64_t &Result) const {
315  const coff_section *sec = toSec(Sec);
316  Result = sec->SizeOfRawData;
317  return object_error::success;
318}
319
320error_code COFFObjectFile::getSectionContents(DataRefImpl Sec,
321                                              StringRef &Result) const {
322  const coff_section *sec = toSec(Sec);
323  ArrayRef<uint8_t> Res;
324  error_code EC = getSectionContents(sec, Res);
325  Result = StringRef(reinterpret_cast<const char*>(Res.data()), Res.size());
326  return EC;
327}
328
329error_code COFFObjectFile::getSectionAlignment(DataRefImpl Sec,
330                                               uint64_t &Res) const {
331  const coff_section *sec = toSec(Sec);
332  if (!sec)
333    return object_error::parse_failed;
334  Res = uint64_t(1) << (((sec->Characteristics & 0x00F00000) >> 20) - 1);
335  return object_error::success;
336}
337
338error_code COFFObjectFile::isSectionText(DataRefImpl Sec,
339                                         bool &Result) const {
340  const coff_section *sec = toSec(Sec);
341  Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
342  return object_error::success;
343}
344
345error_code COFFObjectFile::isSectionData(DataRefImpl Sec,
346                                         bool &Result) const {
347  const coff_section *sec = toSec(Sec);
348  Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
349  return object_error::success;
350}
351
352error_code COFFObjectFile::isSectionBSS(DataRefImpl Sec,
353                                        bool &Result) const {
354  const coff_section *sec = toSec(Sec);
355  Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
356  return object_error::success;
357}
358
359error_code COFFObjectFile::sectionContainsSymbol(DataRefImpl Sec,
360                                                 DataRefImpl Symb,
361                                                 bool &Result) const {
362  const coff_section *sec = toSec(Sec);
363  const coff_symbol *symb = toSymb(Symb);
364  const coff_section *symb_sec = 0;
365  if (error_code ec = getSection(symb->SectionNumber, symb_sec)) return ec;
366  if (symb_sec == sec)
367    Result = true;
368  else
369    Result = false;
370  return object_error::success;
371}
372
373relocation_iterator COFFObjectFile::getSectionRelBegin(DataRefImpl Sec) const {
374  const coff_section *sec = toSec(Sec);
375  DataRefImpl ret;
376  if (sec->NumberOfRelocations == 0)
377    ret.p = 0;
378  else
379    ret.p = reinterpret_cast<uintptr_t>(base() + sec->PointerToRelocations);
380
381  return relocation_iterator(RelocationRef(ret, this));
382}
383
384relocation_iterator COFFObjectFile::getSectionRelEnd(DataRefImpl Sec) const {
385  const coff_section *sec = toSec(Sec);
386  DataRefImpl ret;
387  if (sec->NumberOfRelocations == 0)
388    ret.p = 0;
389  else
390    ret.p = reinterpret_cast<uintptr_t>(
391              reinterpret_cast<const coff_relocation*>(
392                base() + sec->PointerToRelocations)
393              + sec->NumberOfRelocations);
394
395  return relocation_iterator(RelocationRef(ret, this));
396}
397
398COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
399  : ObjectFile(Binary::ID_COFF, Object, ec)
400  , Header(0)
401  , SectionTable(0)
402  , SymbolTable(0)
403  , StringTable(0)
404  , StringTableSize(0) {
405  // Check that we at least have enough room for a header.
406  if (!checkSize(Data, ec, sizeof(coff_file_header))) return;
407
408  // The actual starting location of the COFF header in the file. This can be
409  // non-zero in PE/COFF files.
410  uint64_t HeaderStart = 0;
411
412  // Check if this is a PE/COFF file.
413  if (base()[0] == 0x4d && base()[1] == 0x5a) {
414    // PE/COFF, seek through MS-DOS compatibility stub and 4-byte
415    // PE signature to find 'normal' COFF header.
416    if (!checkSize(Data, ec, 0x3c + 8)) return;
417    HeaderStart = *reinterpret_cast<const ulittle16_t *>(base() + 0x3c);
418    // Check the PE header. ("PE\0\0")
419    if (std::memcmp(base() + HeaderStart, "PE\0\0", 4) != 0) {
420      ec = object_error::parse_failed;
421      return;
422    }
423    HeaderStart += 4; // Skip the PE Header.
424  }
425
426  Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart);
427  if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header)))
428    return;
429
430  SectionTable =
431    reinterpret_cast<const coff_section *>( base()
432                                          + HeaderStart
433                                          + sizeof(coff_file_header)
434                                          + Header->SizeOfOptionalHeader);
435  if (!checkAddr(Data, ec, uintptr_t(SectionTable),
436                 Header->NumberOfSections * sizeof(coff_section)))
437    return;
438
439  if (Header->PointerToSymbolTable != 0) {
440    SymbolTable =
441      reinterpret_cast<const coff_symbol *>(base()
442                                            + Header->PointerToSymbolTable);
443    if (!checkAddr(Data, ec, uintptr_t(SymbolTable),
444                   Header->NumberOfSymbols * sizeof(coff_symbol)))
445      return;
446
447    // Find string table.
448    StringTable = reinterpret_cast<const char *>(base())
449                  + Header->PointerToSymbolTable
450                  + Header->NumberOfSymbols * sizeof(coff_symbol);
451    if (!checkAddr(Data, ec, uintptr_t(StringTable), sizeof(ulittle32_t)))
452      return;
453
454    StringTableSize = *reinterpret_cast<const ulittle32_t *>(StringTable);
455    if (!checkAddr(Data, ec, uintptr_t(StringTable), StringTableSize))
456      return;
457    // Check that the string table is null terminated if has any in it.
458    if (StringTableSize < 4
459        || (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)) {
460      ec = object_error::parse_failed;
461      return;
462    }
463  }
464
465  ec = object_error::success;
466}
467
468symbol_iterator COFFObjectFile::begin_symbols() const {
469  DataRefImpl ret;
470  ret.p = reinterpret_cast<intptr_t>(SymbolTable);
471  return symbol_iterator(SymbolRef(ret, this));
472}
473
474symbol_iterator COFFObjectFile::end_symbols() const {
475  // The symbol table ends where the string table begins.
476  DataRefImpl ret;
477  ret.p = reinterpret_cast<intptr_t>(StringTable);
478  return symbol_iterator(SymbolRef(ret, this));
479}
480
481symbol_iterator COFFObjectFile::begin_dynamic_symbols() const {
482  // TODO: implement
483  report_fatal_error("Dynamic symbols unimplemented in COFFObjectFile");
484}
485
486symbol_iterator COFFObjectFile::end_dynamic_symbols() const {
487  // TODO: implement
488  report_fatal_error("Dynamic symbols unimplemented in COFFObjectFile");
489}
490
491library_iterator COFFObjectFile::begin_libraries_needed() const {
492  // TODO: implement
493  report_fatal_error("Libraries needed unimplemented in COFFObjectFile");
494}
495
496library_iterator COFFObjectFile::end_libraries_needed() const {
497  // TODO: implement
498  report_fatal_error("Libraries needed unimplemented in COFFObjectFile");
499}
500
501StringRef COFFObjectFile::getLoadName() const {
502  // COFF does not have this field.
503  return "";
504}
505
506
507section_iterator COFFObjectFile::begin_sections() const {
508  DataRefImpl ret;
509  ret.p = reinterpret_cast<intptr_t>(SectionTable);
510  return section_iterator(SectionRef(ret, this));
511}
512
513section_iterator COFFObjectFile::end_sections() const {
514  DataRefImpl ret;
515  ret.p = reinterpret_cast<intptr_t>(SectionTable + Header->NumberOfSections);
516  return section_iterator(SectionRef(ret, this));
517}
518
519uint8_t COFFObjectFile::getBytesInAddress() const {
520  return getArch() == Triple::x86_64 ? 8 : 4;
521}
522
523StringRef COFFObjectFile::getFileFormatName() const {
524  switch(Header->Machine) {
525  case COFF::IMAGE_FILE_MACHINE_I386:
526    return "COFF-i386";
527  case COFF::IMAGE_FILE_MACHINE_AMD64:
528    return "COFF-x86-64";
529  default:
530    return "COFF-<unknown arch>";
531  }
532}
533
534unsigned COFFObjectFile::getArch() const {
535  switch(Header->Machine) {
536  case COFF::IMAGE_FILE_MACHINE_I386:
537    return Triple::x86;
538  case COFF::IMAGE_FILE_MACHINE_AMD64:
539    return Triple::x86_64;
540  default:
541    return Triple::UnknownArch;
542  }
543}
544
545error_code COFFObjectFile::getHeader(const coff_file_header *&Res) const {
546  Res = Header;
547  return object_error::success;
548}
549
550error_code COFFObjectFile::getSection(int32_t index,
551                                      const coff_section *&Result) const {
552  // Check for special index values.
553  if (index == COFF::IMAGE_SYM_UNDEFINED ||
554      index == COFF::IMAGE_SYM_ABSOLUTE ||
555      index == COFF::IMAGE_SYM_DEBUG)
556    Result = NULL;
557  else if (index > 0 && index <= Header->NumberOfSections)
558    // We already verified the section table data, so no need to check again.
559    Result = SectionTable + (index - 1);
560  else
561    return object_error::parse_failed;
562  return object_error::success;
563}
564
565error_code COFFObjectFile::getString(uint32_t offset,
566                                     StringRef &Result) const {
567  if (StringTableSize <= 4)
568    // Tried to get a string from an empty string table.
569    return object_error::parse_failed;
570  if (offset >= StringTableSize)
571    return object_error::unexpected_eof;
572  Result = StringRef(StringTable + offset);
573  return object_error::success;
574}
575
576error_code COFFObjectFile::getSymbol(uint32_t index,
577                                     const coff_symbol *&Result) const {
578  if (index < Header->NumberOfSymbols)
579    Result = SymbolTable + index;
580  else
581    return object_error::parse_failed;
582  return object_error::success;
583}
584
585error_code COFFObjectFile::getSymbolName(const coff_symbol *symbol,
586                                         StringRef &Res) const {
587  // Check for string table entry. First 4 bytes are 0.
588  if (symbol->Name.Offset.Zeroes == 0) {
589    uint32_t Offset = symbol->Name.Offset.Offset;
590    if (error_code ec = getString(Offset, Res))
591      return ec;
592    return object_error::success;
593  }
594
595  if (symbol->Name.ShortName[7] == 0)
596    // Null terminated, let ::strlen figure out the length.
597    Res = StringRef(symbol->Name.ShortName);
598  else
599    // Not null terminated, use all 8 bytes.
600    Res = StringRef(symbol->Name.ShortName, 8);
601  return object_error::success;
602}
603
604error_code COFFObjectFile::getSectionName(const coff_section *Sec,
605                                          StringRef &Res) const {
606  StringRef Name;
607  if (Sec->Name[7] == 0)
608    // Null terminated, let ::strlen figure out the length.
609    Name = Sec->Name;
610  else
611    // Not null terminated, use all 8 bytes.
612    Name = StringRef(Sec->Name, 8);
613
614  // Check for string table entry. First byte is '/'.
615  if (Name[0] == '/') {
616    uint32_t Offset;
617    if (Name.substr(1).getAsInteger(10, Offset))
618      return object_error::parse_failed;
619    if (error_code ec = getString(Offset, Name))
620      return ec;
621  }
622
623  Res = Name;
624  return object_error::success;
625}
626
627error_code COFFObjectFile::getSectionContents(const coff_section *Sec,
628                                              ArrayRef<uint8_t> &Res) const {
629  // The only thing that we need to verify is that the contents is contained
630  // within the file bounds. We don't need to make sure it doesn't cover other
631  // data, as there's nothing that says that is not allowed.
632  uintptr_t ConStart = uintptr_t(base()) + Sec->PointerToRawData;
633  uintptr_t ConEnd = ConStart + Sec->SizeOfRawData;
634  if (ConEnd > uintptr_t(Data->getBufferEnd()))
635    return object_error::parse_failed;
636  Res = ArrayRef<uint8_t>(reinterpret_cast<const unsigned char*>(ConStart),
637                          Sec->SizeOfRawData);
638  return object_error::success;
639}
640
641const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
642  return reinterpret_cast<const coff_relocation*>(Rel.p);
643}
644error_code COFFObjectFile::getRelocationNext(DataRefImpl Rel,
645                                             RelocationRef &Res) const {
646  Rel.p = reinterpret_cast<uintptr_t>(
647            reinterpret_cast<const coff_relocation*>(Rel.p) + 1);
648  Res = RelocationRef(Rel, this);
649  return object_error::success;
650}
651error_code COFFObjectFile::getRelocationAddress(DataRefImpl Rel,
652                                                uint64_t &Res) const {
653  Res = toRel(Rel)->VirtualAddress;
654  return object_error::success;
655}
656error_code COFFObjectFile::getRelocationOffset(DataRefImpl Rel,
657                                               uint64_t &Res) const {
658  Res = toRel(Rel)->VirtualAddress;
659  return object_error::success;
660}
661error_code COFFObjectFile::getRelocationSymbol(DataRefImpl Rel,
662                                               SymbolRef &Res) const {
663  const coff_relocation* R = toRel(Rel);
664  DataRefImpl Symb;
665  Symb.p = reinterpret_cast<uintptr_t>(SymbolTable + R->SymbolTableIndex);
666  Res = SymbolRef(Symb, this);
667  return object_error::success;
668}
669error_code COFFObjectFile::getRelocationType(DataRefImpl Rel,
670                                             uint64_t &Res) const {
671  const coff_relocation* R = toRel(Rel);
672  Res = R->Type;
673  return object_error::success;
674}
675
676#define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(enum) \
677  case COFF::enum: res = #enum; break;
678
679error_code COFFObjectFile::getRelocationTypeName(DataRefImpl Rel,
680                                          SmallVectorImpl<char> &Result) const {
681  const coff_relocation *reloc = toRel(Rel);
682  StringRef res;
683  switch (Header->Machine) {
684  case COFF::IMAGE_FILE_MACHINE_AMD64:
685    switch (reloc->Type) {
686    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE);
687    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR64);
688    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32);
689    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32NB);
690    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32);
691    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_1);
692    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_2);
693    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_3);
694    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_4);
695    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_5);
696    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECTION);
697    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL);
698    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL7);
699    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_TOKEN);
700    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SREL32);
701    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_PAIR);
702    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SSPAN32);
703    default:
704      res = "Unknown";
705    }
706    break;
707  case COFF::IMAGE_FILE_MACHINE_I386:
708    switch (reloc->Type) {
709    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_ABSOLUTE);
710    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR16);
711    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL16);
712    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32);
713    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32NB);
714    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SEG12);
715    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECTION);
716    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL);
717    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_TOKEN);
718    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL7);
719    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL32);
720    default:
721      res = "Unknown";
722    }
723    break;
724  default:
725    res = "Unknown";
726  }
727  Result.append(res.begin(), res.end());
728  return object_error::success;
729}
730
731#undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME
732
733error_code COFFObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel,
734                                                       int64_t &Res) const {
735  Res = 0;
736  return object_error::success;
737}
738error_code COFFObjectFile::getRelocationValueString(DataRefImpl Rel,
739                                          SmallVectorImpl<char> &Result) const {
740  const coff_relocation *reloc = toRel(Rel);
741  const coff_symbol *symb = 0;
742  if (error_code ec = getSymbol(reloc->SymbolTableIndex, symb)) return ec;
743  DataRefImpl sym;
744  sym.p = reinterpret_cast<uintptr_t>(symb);
745  StringRef symname;
746  if (error_code ec = getSymbolName(sym, symname)) return ec;
747  Result.append(symname.begin(), symname.end());
748  return object_error::success;
749}
750
751error_code COFFObjectFile::getLibraryNext(DataRefImpl LibData,
752                                          LibraryRef &Result) const {
753  report_fatal_error("getLibraryNext not implemented in COFFObjectFile");
754}
755
756error_code COFFObjectFile::getLibraryPath(DataRefImpl LibData,
757                                          StringRef &Result) const {
758  report_fatal_error("getLibraryPath not implemented in COFFObjectFile");
759}
760
761namespace llvm {
762
763  ObjectFile *ObjectFile::createCOFFObjectFile(MemoryBuffer *Object) {
764    error_code ec;
765    return new COFFObjectFile(Object, ec);
766  }
767
768} // end namespace llvm
769