COFFObjectFile.cpp revision 11ba26db13698a4567730be13a154c5690ef5e75 
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
19using namespace llvm;
20using namespace object;
21
22namespace {
23using support::ulittle8_t;
24using support::ulittle16_t;
25using support::ulittle32_t;
26using support::little16_t;
27}
28
29namespace {
30// Returns false if size is greater than the buffer size. And sets ec.
31bool 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.
40bool 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
54const 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
72const 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
89error_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
104error_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
122error_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
142error_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->getComplexType() == 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
164error_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
171error_code COFFObjectFile::isSymbolWeak(DataRefImpl Symb,
172                                          bool &Result) const {
173  const coff_symbol *symb = toSymb(Symb);
174  Result = (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL);
175  return object_error::success;
176}
177
178error_code COFFObjectFile::getSymbolSize(DataRefImpl Symb,
179                                         uint64_t &Result) const {
180  // FIXME: Return the correct size. This requires looking at all the symbols
181  //        in the same section as this symbol, and looking for either the next
182  //        symbol, or the end of the section.
183  const coff_symbol *symb = toSymb(Symb);
184  const coff_section *Section = NULL;
185  if (error_code ec = getSection(symb->SectionNumber, Section))
186    return ec;
187  char Type;
188  if (error_code ec = getSymbolNMTypeChar(Symb, Type))
189    return ec;
190  if (Type == 'U' || Type == 'w')
191    Result = UnknownAddressOrSize;
192  else if (Section)
193    Result = Section->SizeOfRawData - symb->Value;
194  else
195    Result = 0;
196  return object_error::success;
197}
198
199error_code COFFObjectFile::getSymbolNMTypeChar(DataRefImpl Symb,
200                                               char &Result) const {
201  const coff_symbol *symb = toSymb(Symb);
202  StringRef name;
203  if (error_code ec = getSymbolName(Symb, name))
204    return ec;
205  char ret = StringSwitch<char>(name)
206    .StartsWith(".debug", 'N')
207    .StartsWith(".sxdata", 'N')
208    .Default('?');
209
210  if (ret != '?') {
211    Result = ret;
212    return object_error::success;
213  }
214
215  uint32_t Characteristics = 0;
216  if (symb->SectionNumber > 0) {
217    const coff_section *Section = NULL;
218    if (error_code ec = getSection(symb->SectionNumber, Section))
219      return ec;
220    Characteristics = Section->Characteristics;
221  }
222
223  switch (symb->SectionNumber) {
224  case COFF::IMAGE_SYM_UNDEFINED:
225    // Check storage classes.
226    if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL) {
227      Result = 'w';
228      return object_error::success; // Don't do ::toupper.
229    } else if (symb->Value != 0) // Check for common symbols.
230      ret = 'c';
231    else
232      ret = 'u';
233    break;
234  case COFF::IMAGE_SYM_ABSOLUTE:
235    ret = 'a';
236    break;
237  case COFF::IMAGE_SYM_DEBUG:
238    ret = 'n';
239    break;
240  default:
241    // Check section type.
242    if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
243      ret = 't';
244    else if (  Characteristics & COFF::IMAGE_SCN_MEM_READ
245            && ~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only.
246      ret = 'r';
247    else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
248      ret = 'd';
249    else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
250      ret = 'b';
251    else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
252      ret = 'i';
253
254    // Check for section symbol.
255    else if (  symb->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC
256            && symb->Value == 0)
257       ret = 's';
258  }
259
260  if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL)
261    ret = ::toupper(ret);
262
263  Result = ret;
264  return object_error::success;
265}
266
267error_code COFFObjectFile::isSymbolInternal(DataRefImpl Symb,
268                                            bool &Result) const {
269  Result = false;
270  return object_error::success;
271}
272
273error_code COFFObjectFile::isSymbolAbsolute(DataRefImpl Symb,
274                                            bool &Result) const {
275  const coff_symbol *symb = toSymb(Symb);
276  Result = symb->SectionNumber == COFF::IMAGE_SYM_ABSOLUTE;
277  return object_error::success;
278}
279
280error_code COFFObjectFile::getSymbolSection(DataRefImpl Symb,
281                                            section_iterator &Result) const {
282  const coff_symbol *symb = toSymb(Symb);
283  if (symb->SectionNumber <= COFF::IMAGE_SYM_UNDEFINED)
284    Result = end_sections();
285  else {
286    const coff_section *sec;
287    if (error_code ec = getSection(symb->SectionNumber, sec)) return ec;
288    DataRefImpl Sec;
289    std::memset(&Sec, 0, sizeof(Sec));
290    Sec.p = reinterpret_cast<uintptr_t>(sec);
291    Result = section_iterator(SectionRef(Sec, this));
292  }
293  return object_error::success;
294}
295
296error_code COFFObjectFile::getSectionNext(DataRefImpl Sec,
297                                          SectionRef &Result) const {
298  const coff_section *sec = toSec(Sec);
299  sec += 1;
300  Sec.p = reinterpret_cast<uintptr_t>(sec);
301  Result = SectionRef(Sec, this);
302  return object_error::success;
303}
304
305error_code COFFObjectFile::getSectionName(DataRefImpl Sec,
306                                          StringRef &Result) const {
307  const coff_section *sec = toSec(Sec);
308  StringRef name;
309  if (sec->Name[7] == 0)
310    // Null terminated, let ::strlen figure out the length.
311    name = sec->Name;
312  else
313    // Not null terminated, use all 8 bytes.
314    name = StringRef(sec->Name, 8);
315
316  // Check for string table entry. First byte is '/'.
317  if (name[0] == '/') {
318    uint32_t Offset;
319    name.substr(1).getAsInteger(10, Offset);
320    if (error_code ec = getString(Offset, name))
321      return ec;
322  }
323
324  Result = name;
325  return object_error::success;
326}
327
328error_code COFFObjectFile::getSectionAddress(DataRefImpl Sec,
329                                             uint64_t &Result) const {
330  const coff_section *sec = toSec(Sec);
331  Result = sec->VirtualAddress;
332  return object_error::success;
333}
334
335error_code COFFObjectFile::getSectionSize(DataRefImpl Sec,
336                                          uint64_t &Result) const {
337  const coff_section *sec = toSec(Sec);
338  Result = sec->SizeOfRawData;
339  return object_error::success;
340}
341
342error_code COFFObjectFile::getSectionContents(DataRefImpl Sec,
343                                              StringRef &Result) const {
344  const coff_section *sec = toSec(Sec);
345  // The only thing that we need to verify is that the contents is contained
346  // within the file bounds. We don't need to make sure it doesn't cover other
347  // data, as there's nothing that says that is not allowed.
348  uintptr_t con_start = uintptr_t(base()) + sec->PointerToRawData;
349  uintptr_t con_end = con_start + sec->SizeOfRawData;
350  if (con_end > uintptr_t(Data->getBufferEnd()))
351    return object_error::parse_failed;
352  Result = StringRef(reinterpret_cast<const char*>(con_start),
353                     sec->SizeOfRawData);
354  return object_error::success;
355}
356
357error_code COFFObjectFile::getSectionAlignment(DataRefImpl Sec,
358                                               uint64_t &Res) const {
359  const coff_section *sec = toSec(Sec);
360  if (!sec)
361    return object_error::parse_failed;
362  Res = uint64_t(1) << (((sec->Characteristics & 0x00F00000) >> 20) - 1);
363  return object_error::success;
364}
365
366error_code COFFObjectFile::isSectionText(DataRefImpl Sec,
367                                         bool &Result) const {
368  const coff_section *sec = toSec(Sec);
369  Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
370  return object_error::success;
371}
372
373error_code COFFObjectFile::isSectionData(DataRefImpl Sec,
374                                         bool &Result) const {
375  const coff_section *sec = toSec(Sec);
376  Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
377  return object_error::success;
378}
379
380error_code COFFObjectFile::isSectionBSS(DataRefImpl Sec,
381                                        bool &Result) const {
382  const coff_section *sec = toSec(Sec);
383  Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
384  return object_error::success;
385}
386
387error_code COFFObjectFile::sectionContainsSymbol(DataRefImpl Sec,
388                                                 DataRefImpl Symb,
389                                                 bool &Result) const {
390  const coff_section *sec = toSec(Sec);
391  const coff_symbol *symb = toSymb(Symb);
392  const coff_section *symb_sec;
393  if (error_code ec = getSection(symb->SectionNumber, symb_sec)) return ec;
394  if (symb_sec == sec)
395    Result = true;
396  else
397    Result = false;
398  return object_error::success;
399}
400
401relocation_iterator COFFObjectFile::getSectionRelBegin(DataRefImpl Sec) const {
402  const coff_section *sec = toSec(Sec);
403  DataRefImpl ret;
404  std::memset(&ret, 0, sizeof(ret));
405  if (sec->NumberOfRelocations == 0)
406    ret.p = 0;
407  else
408    ret.p = reinterpret_cast<uintptr_t>(base() + sec->PointerToRelocations);
409
410  return relocation_iterator(RelocationRef(ret, this));
411}
412
413relocation_iterator COFFObjectFile::getSectionRelEnd(DataRefImpl Sec) const {
414  const coff_section *sec = toSec(Sec);
415  DataRefImpl ret;
416  std::memset(&ret, 0, sizeof(ret));
417  if (sec->NumberOfRelocations == 0)
418    ret.p = 0;
419  else
420    ret.p = reinterpret_cast<uintptr_t>(
421              reinterpret_cast<const coff_relocation*>(
422                base() + sec->PointerToRelocations)
423              + sec->NumberOfRelocations);
424
425  return relocation_iterator(RelocationRef(ret, this));
426}
427
428COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
429  : ObjectFile(Binary::isCOFF, Object, ec)
430  , Header(0)
431  , SectionTable(0)
432  , SymbolTable(0)
433  , StringTable(0)
434  , StringTableSize(0) {
435  // Check that we at least have enough room for a header.
436  if (!checkSize(Data, ec, sizeof(coff_file_header))) return;
437
438  // The actual starting location of the COFF header in the file. This can be
439  // non-zero in PE/COFF files.
440  uint64_t HeaderStart = 0;
441
442  // Check if this is a PE/COFF file.
443  if (base()[0] == 0x4d && base()[1] == 0x5a) {
444    // PE/COFF, seek through MS-DOS compatibility stub and 4-byte
445    // PE signature to find 'normal' COFF header.
446    if (!checkSize(Data, ec, 0x3c + 8)) return;
447    HeaderStart = *reinterpret_cast<const ulittle16_t *>(base() + 0x3c);
448    // Check the PE header. ("PE\0\0")
449    if (std::memcmp(base() + HeaderStart, "PE\0\0", 4) != 0) {
450      ec = object_error::parse_failed;
451      return;
452    }
453    HeaderStart += 4; // Skip the PE Header.
454  }
455
456  Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart);
457  if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header)))
458    return;
459
460  SectionTable =
461    reinterpret_cast<const coff_section *>( base()
462                                          + HeaderStart
463                                          + sizeof(coff_file_header)
464                                          + Header->SizeOfOptionalHeader);
465  if (!checkAddr(Data, ec, uintptr_t(SectionTable),
466                 Header->NumberOfSections * sizeof(coff_section)))
467    return;
468
469  if (Header->PointerToSymbolTable != 0) {
470    SymbolTable =
471      reinterpret_cast<const coff_symbol *>(base()
472                                            + Header->PointerToSymbolTable);
473    if (!checkAddr(Data, ec, uintptr_t(SymbolTable),
474                   Header->NumberOfSymbols * sizeof(coff_symbol)))
475      return;
476
477    // Find string table.
478    StringTable = reinterpret_cast<const char *>(base())
479                  + Header->PointerToSymbolTable
480                  + Header->NumberOfSymbols * sizeof(coff_symbol);
481    if (!checkAddr(Data, ec, uintptr_t(StringTable), sizeof(ulittle32_t)))
482      return;
483
484    StringTableSize = *reinterpret_cast<const ulittle32_t *>(StringTable);
485    if (!checkAddr(Data, ec, uintptr_t(StringTable), StringTableSize))
486      return;
487    // Check that the string table is null terminated if has any in it.
488    if (StringTableSize < 4
489        || (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)) {
490      ec = object_error::parse_failed;
491      return;
492    }
493  }
494
495  ec = object_error::success;
496}
497
498symbol_iterator COFFObjectFile::begin_symbols() const {
499  DataRefImpl ret;
500  std::memset(&ret, 0, sizeof(DataRefImpl));
501  ret.p = reinterpret_cast<intptr_t>(SymbolTable);
502  return symbol_iterator(SymbolRef(ret, this));
503}
504
505symbol_iterator COFFObjectFile::end_symbols() const {
506  // The symbol table ends where the string table begins.
507  DataRefImpl ret;
508  std::memset(&ret, 0, sizeof(DataRefImpl));
509  ret.p = reinterpret_cast<intptr_t>(StringTable);
510  return symbol_iterator(SymbolRef(ret, this));
511}
512
513section_iterator COFFObjectFile::begin_sections() const {
514  DataRefImpl ret;
515  std::memset(&ret, 0, sizeof(DataRefImpl));
516  ret.p = reinterpret_cast<intptr_t>(SectionTable);
517  return section_iterator(SectionRef(ret, this));
518}
519
520section_iterator COFFObjectFile::end_sections() const {
521  DataRefImpl ret;
522  std::memset(&ret, 0, sizeof(DataRefImpl));
523  ret.p = reinterpret_cast<intptr_t>(SectionTable + Header->NumberOfSections);
524  return section_iterator(SectionRef(ret, this));
525}
526
527uint8_t COFFObjectFile::getBytesInAddress() const {
528  return getArch() == Triple::x86_64 ? 8 : 4;
529}
530
531StringRef COFFObjectFile::getFileFormatName() const {
532  switch(Header->Machine) {
533  case COFF::IMAGE_FILE_MACHINE_I386:
534    return "COFF-i386";
535  case COFF::IMAGE_FILE_MACHINE_AMD64:
536    return "COFF-x86-64";
537  default:
538    return "COFF-<unknown arch>";
539  }
540}
541
542unsigned COFFObjectFile::getArch() const {
543  switch(Header->Machine) {
544  case COFF::IMAGE_FILE_MACHINE_I386:
545    return Triple::x86;
546  case COFF::IMAGE_FILE_MACHINE_AMD64:
547    return Triple::x86_64;
548  default:
549    return Triple::UnknownArch;
550  }
551}
552
553error_code COFFObjectFile::getHeader(const coff_file_header *&Res) const {
554  Res = Header;
555  return object_error::success;
556}
557
558error_code COFFObjectFile::getSection(int32_t index,
559                                      const coff_section *&Result) const {
560  // Check for special index values.
561  if (index == COFF::IMAGE_SYM_UNDEFINED ||
562      index == COFF::IMAGE_SYM_ABSOLUTE ||
563      index == COFF::IMAGE_SYM_DEBUG)
564    Result = NULL;
565  else if (index > 0 && index <= Header->NumberOfSections)
566    // We already verified the section table data, so no need to check again.
567    Result = SectionTable + (index - 1);
568  else
569    return object_error::parse_failed;
570  return object_error::success;
571}
572
573error_code COFFObjectFile::getString(uint32_t offset,
574                                     StringRef &Result) const {
575  if (StringTableSize <= 4)
576    // Tried to get a string from an empty string table.
577    return object_error::parse_failed;
578  if (offset >= StringTableSize)
579    return object_error::unexpected_eof;
580  Result = StringRef(StringTable + offset);
581  return object_error::success;
582}
583
584error_code COFFObjectFile::getSymbol(uint32_t index,
585                                     const coff_symbol *&Result) const {
586  if (index < Header->NumberOfSymbols)
587    Result = SymbolTable + index;
588  else
589    return object_error::parse_failed;
590  return object_error::success;
591}
592
593error_code COFFObjectFile::getSymbolName(const coff_symbol *symbol,
594                                         StringRef &Res) const {
595  // Check for string table entry. First 4 bytes are 0.
596  if (symbol->Name.Offset.Zeroes == 0) {
597    uint32_t Offset = symbol->Name.Offset.Offset;
598    if (error_code ec = getString(Offset, Res))
599      return ec;
600    return object_error::success;
601  }
602
603  if (symbol->Name.ShortName[7] == 0)
604    // Null terminated, let ::strlen figure out the length.
605    Res = StringRef(symbol->Name.ShortName);
606  else
607    // Not null terminated, use all 8 bytes.
608    Res = StringRef(symbol->Name.ShortName, 8);
609  return object_error::success;
610}
611
612const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
613  return reinterpret_cast<const coff_relocation*>(Rel.p);
614}
615error_code COFFObjectFile::getRelocationNext(DataRefImpl Rel,
616                                             RelocationRef &Res) const {
617  Rel.p = reinterpret_cast<uintptr_t>(
618            reinterpret_cast<const coff_relocation*>(Rel.p) + 1);
619  Res = RelocationRef(Rel, this);
620  return object_error::success;
621}
622error_code COFFObjectFile::getRelocationAddress(DataRefImpl Rel,
623                                                uint64_t &Res) const {
624  Res = toRel(Rel)->VirtualAddress;
625  return object_error::success;
626}
627error_code COFFObjectFile::getRelocationSymbol(DataRefImpl Rel,
628                                               SymbolRef &Res) const {
629  const coff_relocation* R = toRel(Rel);
630  DataRefImpl Symb;
631  std::memset(&Symb, 0, sizeof(Symb));
632  Symb.p = reinterpret_cast<uintptr_t>(SymbolTable + R->SymbolTableIndex);
633  Res = SymbolRef(Symb, this);
634  return object_error::success;
635}
636error_code COFFObjectFile::getRelocationType(DataRefImpl Rel,
637                                             uint64_t &Res) const {
638  const coff_relocation* R = toRel(Rel);
639  Res = R->Type;
640  return object_error::success;
641}
642
643#define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(enum) \
644  case COFF::enum: res = #enum; break;
645
646error_code COFFObjectFile::getRelocationTypeName(DataRefImpl Rel,
647                                          SmallVectorImpl<char> &Result) const {
648  const coff_relocation *reloc = toRel(Rel);
649  StringRef res;
650  switch (Header->Machine) {
651  case COFF::IMAGE_FILE_MACHINE_AMD64:
652    switch (reloc->Type) {
653    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE);
654    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR64);
655    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32);
656    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32NB);
657    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32);
658    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_1);
659    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_2);
660    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_3);
661    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_4);
662    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_5);
663    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECTION);
664    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL);
665    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL7);
666    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_TOKEN);
667    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SREL32);
668    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_PAIR);
669    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SSPAN32);
670    default:
671      res = "Unknown";
672    }
673    break;
674  case COFF::IMAGE_FILE_MACHINE_I386:
675    switch (reloc->Type) {
676    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_ABSOLUTE);
677    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR16);
678    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL16);
679    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32);
680    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32NB);
681    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SEG12);
682    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECTION);
683    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL);
684    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_TOKEN);
685    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL7);
686    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL32);
687    default:
688      res = "Unknown";
689    }
690    break;
691  default:
692    res = "Unknown";
693  }
694  Result.append(res.begin(), res.end());
695  return object_error::success;
696}
697
698#undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME
699
700error_code COFFObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel,
701                                                       int64_t &Res) const {
702  Res = 0;
703  return object_error::success;
704}
705error_code COFFObjectFile::getRelocationValueString(DataRefImpl Rel,
706                                          SmallVectorImpl<char> &Result) const {
707  const coff_relocation *reloc = toRel(Rel);
708  const coff_symbol *symb = 0;
709  if (error_code ec = getSymbol(reloc->SymbolTableIndex, symb)) return ec;
710  DataRefImpl sym;
711  ::memset(&sym, 0, sizeof(sym));
712  sym.p = reinterpret_cast<uintptr_t>(symb);
713  StringRef symname;
714  if (error_code ec = getSymbolName(sym, symname)) return ec;
715  Result.append(symname.begin(), symname.end());
716  return object_error::success;
717}
718
719namespace llvm {
720
721  ObjectFile *ObjectFile::createCOFFObjectFile(MemoryBuffer *Object) {
722    error_code ec;
723    return new COFFObjectFile(Object, ec);
724  }
725
726} // end namespace llvm
727