9664c3b03c95ba6cb40a6be492f0170de0c36378
[oota-llvm.git] / include / llvm / Object / COFF.h
1 //===- COFF.h - 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 #ifndef LLVM_OBJECT_COFF_H
15 #define LLVM_OBJECT_COFF_H
16
17 #include "llvm/ADT/PointerUnion.h"
18 #include "llvm/Object/ObjectFile.h"
19 #include "llvm/Support/COFF.h"
20 #include "llvm/Support/Endian.h"
21 #include "llvm/Support/ErrorOr.h"
22
23 namespace llvm {
24 template <typename T> class ArrayRef;
25
26 namespace object {
27 class ImportDirectoryEntryRef;
28 class DelayImportDirectoryEntryRef;
29 class ExportDirectoryEntryRef;
30 class ImportedSymbolRef;
31 class BaseRelocRef;
32 typedef content_iterator<ImportDirectoryEntryRef> import_directory_iterator;
33 typedef content_iterator<DelayImportDirectoryEntryRef>
34     delay_import_directory_iterator;
35 typedef content_iterator<ExportDirectoryEntryRef> export_directory_iterator;
36 typedef content_iterator<ImportedSymbolRef> imported_symbol_iterator;
37 typedef content_iterator<BaseRelocRef> base_reloc_iterator;
38
39 /// The DOS compatible header at the front of all PE/COFF executables.
40 struct dos_header {
41   char                 Magic[2];
42   support::ulittle16_t UsedBytesInTheLastPage;
43   support::ulittle16_t FileSizeInPages;
44   support::ulittle16_t NumberOfRelocationItems;
45   support::ulittle16_t HeaderSizeInParagraphs;
46   support::ulittle16_t MinimumExtraParagraphs;
47   support::ulittle16_t MaximumExtraParagraphs;
48   support::ulittle16_t InitialRelativeSS;
49   support::ulittle16_t InitialSP;
50   support::ulittle16_t Checksum;
51   support::ulittle16_t InitialIP;
52   support::ulittle16_t InitialRelativeCS;
53   support::ulittle16_t AddressOfRelocationTable;
54   support::ulittle16_t OverlayNumber;
55   support::ulittle16_t Reserved[4];
56   support::ulittle16_t OEMid;
57   support::ulittle16_t OEMinfo;
58   support::ulittle16_t Reserved2[10];
59   support::ulittle32_t AddressOfNewExeHeader;
60 };
61
62 struct coff_file_header {
63   support::ulittle16_t Machine;
64   support::ulittle16_t NumberOfSections;
65   support::ulittle32_t TimeDateStamp;
66   support::ulittle32_t PointerToSymbolTable;
67   support::ulittle32_t NumberOfSymbols;
68   support::ulittle16_t SizeOfOptionalHeader;
69   support::ulittle16_t Characteristics;
70
71   bool isImportLibrary() const { return NumberOfSections == 0xffff; }
72 };
73
74 struct coff_bigobj_file_header {
75   support::ulittle16_t Sig1;
76   support::ulittle16_t Sig2;
77   support::ulittle16_t Version;
78   support::ulittle16_t Machine;
79   support::ulittle32_t TimeDateStamp;
80   uint8_t              UUID[16];
81   support::ulittle32_t unused1;
82   support::ulittle32_t unused2;
83   support::ulittle32_t unused3;
84   support::ulittle32_t unused4;
85   support::ulittle32_t NumberOfSections;
86   support::ulittle32_t PointerToSymbolTable;
87   support::ulittle32_t NumberOfSymbols;
88 };
89
90 /// The 32-bit PE header that follows the COFF header.
91 struct pe32_header {
92   support::ulittle16_t Magic;
93   uint8_t MajorLinkerVersion;
94   uint8_t MinorLinkerVersion;
95   support::ulittle32_t SizeOfCode;
96   support::ulittle32_t SizeOfInitializedData;
97   support::ulittle32_t SizeOfUninitializedData;
98   support::ulittle32_t AddressOfEntryPoint;
99   support::ulittle32_t BaseOfCode;
100   support::ulittle32_t BaseOfData;
101   support::ulittle32_t ImageBase;
102   support::ulittle32_t SectionAlignment;
103   support::ulittle32_t FileAlignment;
104   support::ulittle16_t MajorOperatingSystemVersion;
105   support::ulittle16_t MinorOperatingSystemVersion;
106   support::ulittle16_t MajorImageVersion;
107   support::ulittle16_t MinorImageVersion;
108   support::ulittle16_t MajorSubsystemVersion;
109   support::ulittle16_t MinorSubsystemVersion;
110   support::ulittle32_t Win32VersionValue;
111   support::ulittle32_t SizeOfImage;
112   support::ulittle32_t SizeOfHeaders;
113   support::ulittle32_t CheckSum;
114   support::ulittle16_t Subsystem;
115   // FIXME: This should be DllCharacteristics.
116   support::ulittle16_t DLLCharacteristics;
117   support::ulittle32_t SizeOfStackReserve;
118   support::ulittle32_t SizeOfStackCommit;
119   support::ulittle32_t SizeOfHeapReserve;
120   support::ulittle32_t SizeOfHeapCommit;
121   support::ulittle32_t LoaderFlags;
122   // FIXME: This should be NumberOfRvaAndSizes.
123   support::ulittle32_t NumberOfRvaAndSize;
124 };
125
126 /// The 64-bit PE header that follows the COFF header.
127 struct pe32plus_header {
128   support::ulittle16_t Magic;
129   uint8_t MajorLinkerVersion;
130   uint8_t MinorLinkerVersion;
131   support::ulittle32_t SizeOfCode;
132   support::ulittle32_t SizeOfInitializedData;
133   support::ulittle32_t SizeOfUninitializedData;
134   support::ulittle32_t AddressOfEntryPoint;
135   support::ulittle32_t BaseOfCode;
136   support::ulittle64_t ImageBase;
137   support::ulittle32_t SectionAlignment;
138   support::ulittle32_t FileAlignment;
139   support::ulittle16_t MajorOperatingSystemVersion;
140   support::ulittle16_t MinorOperatingSystemVersion;
141   support::ulittle16_t MajorImageVersion;
142   support::ulittle16_t MinorImageVersion;
143   support::ulittle16_t MajorSubsystemVersion;
144   support::ulittle16_t MinorSubsystemVersion;
145   support::ulittle32_t Win32VersionValue;
146   support::ulittle32_t SizeOfImage;
147   support::ulittle32_t SizeOfHeaders;
148   support::ulittle32_t CheckSum;
149   support::ulittle16_t Subsystem;
150   support::ulittle16_t DLLCharacteristics;
151   support::ulittle64_t SizeOfStackReserve;
152   support::ulittle64_t SizeOfStackCommit;
153   support::ulittle64_t SizeOfHeapReserve;
154   support::ulittle64_t SizeOfHeapCommit;
155   support::ulittle32_t LoaderFlags;
156   support::ulittle32_t NumberOfRvaAndSize;
157 };
158
159 struct data_directory {
160   support::ulittle32_t RelativeVirtualAddress;
161   support::ulittle32_t Size;
162 };
163
164 struct import_directory_table_entry {
165   support::ulittle32_t ImportLookupTableRVA;
166   support::ulittle32_t TimeDateStamp;
167   support::ulittle32_t ForwarderChain;
168   support::ulittle32_t NameRVA;
169   support::ulittle32_t ImportAddressTableRVA;
170 };
171
172 template <typename IntTy>
173 struct import_lookup_table_entry {
174   IntTy Data;
175
176   bool isOrdinal() const { return Data < 0; }
177
178   uint16_t getOrdinal() const {
179     assert(isOrdinal() && "ILT entry is not an ordinal!");
180     return Data & 0xFFFF;
181   }
182
183   uint32_t getHintNameRVA() const {
184     assert(!isOrdinal() && "ILT entry is not a Hint/Name RVA!");
185     return Data & 0xFFFFFFFF;
186   }
187 };
188
189 typedef import_lookup_table_entry<support::little32_t>
190     import_lookup_table_entry32;
191 typedef import_lookup_table_entry<support::little64_t>
192     import_lookup_table_entry64;
193
194 struct delay_import_directory_table_entry {
195   // dumpbin reports this field as "Characteristics" instead of "Attributes".
196   support::ulittle32_t Attributes;
197   support::ulittle32_t Name;
198   support::ulittle32_t ModuleHandle;
199   support::ulittle32_t DelayImportAddressTable;
200   support::ulittle32_t DelayImportNameTable;
201   support::ulittle32_t BoundDelayImportTable;
202   support::ulittle32_t UnloadDelayImportTable;
203   support::ulittle32_t TimeStamp;
204 };
205
206 struct export_directory_table_entry {
207   support::ulittle32_t ExportFlags;
208   support::ulittle32_t TimeDateStamp;
209   support::ulittle16_t MajorVersion;
210   support::ulittle16_t MinorVersion;
211   support::ulittle32_t NameRVA;
212   support::ulittle32_t OrdinalBase;
213   support::ulittle32_t AddressTableEntries;
214   support::ulittle32_t NumberOfNamePointers;
215   support::ulittle32_t ExportAddressTableRVA;
216   support::ulittle32_t NamePointerRVA;
217   support::ulittle32_t OrdinalTableRVA;
218 };
219
220 union export_address_table_entry {
221   support::ulittle32_t ExportRVA;
222   support::ulittle32_t ForwarderRVA;
223 };
224
225 typedef support::ulittle32_t export_name_pointer_table_entry;
226 typedef support::ulittle16_t export_ordinal_table_entry;
227
228 struct StringTableOffset {
229   support::ulittle32_t Zeroes;
230   support::ulittle32_t Offset;
231 };
232
233 template <typename SectionNumberType>
234 struct coff_symbol {
235   union {
236     char ShortName[COFF::NameSize];
237     StringTableOffset Offset;
238   } Name;
239
240   support::ulittle32_t Value;
241   SectionNumberType SectionNumber;
242
243   support::ulittle16_t Type;
244
245   uint8_t StorageClass;
246   uint8_t NumberOfAuxSymbols;
247 };
248
249 typedef coff_symbol<support::ulittle16_t> coff_symbol16;
250 typedef coff_symbol<support::ulittle32_t> coff_symbol32;
251
252 class COFFSymbolRef {
253 public:
254   COFFSymbolRef(const coff_symbol16 *CS) : CS16(CS), CS32(nullptr) {}
255   COFFSymbolRef(const coff_symbol32 *CS) : CS16(nullptr), CS32(CS) {}
256   COFFSymbolRef() : CS16(nullptr), CS32(nullptr) {}
257
258   const void *getRawPtr() const {
259     return CS16 ? static_cast<const void *>(CS16) : CS32;
260   }
261
262   friend bool operator<(COFFSymbolRef A, COFFSymbolRef B) {
263     return A.getRawPtr() < B.getRawPtr();
264   }
265
266   bool isBigObj() const {
267     if (CS16)
268       return false;
269     if (CS32)
270       return true;
271     llvm_unreachable("COFFSymbolRef points to nothing!");
272   }
273
274   const char *getShortName() const {
275     return CS16 ? CS16->Name.ShortName : CS32->Name.ShortName;
276   }
277
278   const StringTableOffset &getStringTableOffset() const {
279     assert(isSet() && "COFFSymbolRef points to nothing!");
280     return CS16 ? CS16->Name.Offset : CS32->Name.Offset;
281   }
282
283   uint32_t getValue() const { return CS16 ? CS16->Value : CS32->Value; }
284
285   int32_t getSectionNumber() const {
286     assert(isSet() && "COFFSymbolRef points to nothing!");
287     if (CS16) {
288       // Reserved sections are returned as negative numbers.
289       if (CS16->SectionNumber <= COFF::MaxNumberOfSections16)
290         return CS16->SectionNumber;
291       return static_cast<int16_t>(CS16->SectionNumber);
292     }
293     return static_cast<int32_t>(CS32->SectionNumber);
294   }
295
296   uint16_t getType() const {
297     assert(isSet() && "COFFSymbolRef points to nothing!");
298     return CS16 ? CS16->Type : CS32->Type;
299   }
300
301   uint8_t getStorageClass() const {
302     assert(isSet() && "COFFSymbolRef points to nothing!");
303     return CS16 ? CS16->StorageClass : CS32->StorageClass;
304   }
305
306   uint8_t getNumberOfAuxSymbols() const {
307     assert(isSet() && "COFFSymbolRef points to nothing!");
308     return CS16 ? CS16->NumberOfAuxSymbols : CS32->NumberOfAuxSymbols;
309   }
310
311   uint8_t getBaseType() const { return getType() & 0x0F; }
312
313   uint8_t getComplexType() const {
314     return (getType() & 0xF0) >> COFF::SCT_COMPLEX_TYPE_SHIFT;
315   }
316
317   bool isExternal() const {
318     return getStorageClass() == COFF::IMAGE_SYM_CLASS_EXTERNAL;
319   }
320
321   bool isCommon() const {
322     return isExternal() && getSectionNumber() == COFF::IMAGE_SYM_UNDEFINED &&
323            getValue() != 0;
324   }
325
326   bool isUndefined() const {
327     return isExternal() && getSectionNumber() == COFF::IMAGE_SYM_UNDEFINED &&
328            getValue() == 0;
329   }
330
331   bool isWeakExternal() const {
332     return getStorageClass() == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL;
333   }
334
335   bool isFunctionDefinition() const {
336     return isExternal() && getBaseType() == COFF::IMAGE_SYM_TYPE_NULL &&
337            getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION &&
338            !COFF::isReservedSectionNumber(getSectionNumber());
339   }
340
341   bool isFunctionLineInfo() const {
342     return getStorageClass() == COFF::IMAGE_SYM_CLASS_FUNCTION;
343   }
344
345   bool isAnyUndefined() const {
346     return isUndefined() || isWeakExternal();
347   }
348
349   bool isFileRecord() const {
350     return getStorageClass() == COFF::IMAGE_SYM_CLASS_FILE;
351   }
352
353   bool isSection() const {
354     return getStorageClass() == COFF::IMAGE_SYM_CLASS_SECTION;
355   }
356
357   bool isSectionDefinition() const {
358     // C++/CLI creates external ABS symbols for non-const appdomain globals.
359     // These are also followed by an auxiliary section definition.
360     bool isAppdomainGlobal =
361         getStorageClass() == COFF::IMAGE_SYM_CLASS_EXTERNAL &&
362         getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE;
363     bool isOrdinarySection = getStorageClass() == COFF::IMAGE_SYM_CLASS_STATIC;
364     if (!getNumberOfAuxSymbols())
365       return false;
366     return isAppdomainGlobal || isOrdinarySection;
367   }
368
369   bool isCLRToken() const {
370     return getStorageClass() == COFF::IMAGE_SYM_CLASS_CLR_TOKEN;
371   }
372
373 private:
374   bool isSet() const { return CS16 || CS32; }
375
376   const coff_symbol16 *CS16;
377   const coff_symbol32 *CS32;
378 };
379
380 struct coff_section {
381   char Name[COFF::NameSize];
382   support::ulittle32_t VirtualSize;
383   support::ulittle32_t VirtualAddress;
384   support::ulittle32_t SizeOfRawData;
385   support::ulittle32_t PointerToRawData;
386   support::ulittle32_t PointerToRelocations;
387   support::ulittle32_t PointerToLinenumbers;
388   support::ulittle16_t NumberOfRelocations;
389   support::ulittle16_t NumberOfLinenumbers;
390   support::ulittle32_t Characteristics;
391
392   // Returns true if the actual number of relocations is stored in
393   // VirtualAddress field of the first relocation table entry.
394   bool hasExtendedRelocations() const {
395     return (Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) &&
396            NumberOfRelocations == UINT16_MAX;
397   }
398 };
399
400 struct coff_relocation {
401   support::ulittle32_t VirtualAddress;
402   support::ulittle32_t SymbolTableIndex;
403   support::ulittle16_t Type;
404 };
405
406 struct coff_aux_function_definition {
407   support::ulittle32_t TagIndex;
408   support::ulittle32_t TotalSize;
409   support::ulittle32_t PointerToLinenumber;
410   support::ulittle32_t PointerToNextFunction;
411 };
412
413 struct coff_aux_bf_and_ef_symbol {
414   char Unused1[4];
415   support::ulittle16_t Linenumber;
416   char Unused2[6];
417   support::ulittle32_t PointerToNextFunction;
418 };
419
420 struct coff_aux_weak_external {
421   support::ulittle32_t TagIndex;
422   support::ulittle32_t Characteristics;
423 };
424
425 struct coff_aux_section_definition {
426   support::ulittle32_t Length;
427   support::ulittle16_t NumberOfRelocations;
428   support::ulittle16_t NumberOfLinenumbers;
429   support::ulittle32_t CheckSum;
430   support::ulittle16_t NumberLowPart;
431   uint8_t              Selection;
432   uint8_t              Unused;
433   support::ulittle16_t NumberHighPart;
434   int32_t getNumber(bool IsBigObj) const {
435     uint32_t Number = static_cast<uint32_t>(NumberLowPart);
436     if (IsBigObj)
437       Number |= static_cast<uint32_t>(NumberHighPart) << 16;
438     return static_cast<int32_t>(Number);
439   }
440 };
441
442 struct coff_aux_clr_token {
443   uint8_t              AuxType;
444   uint8_t              Reserved;
445   support::ulittle32_t SymbolTableIndex;
446 };
447
448 struct coff_import_directory_table_entry {
449   support::ulittle32_t ImportLookupTableRVA;
450   support::ulittle32_t TimeDateStamp;
451   support::ulittle32_t ForwarderChain;
452   support::ulittle32_t NameRVA;
453   support::ulittle32_t ImportAddressTableRVA;
454 };
455
456 struct coff_load_configuration32 {
457   support::ulittle32_t Characteristics;
458   support::ulittle32_t TimeDateStamp;
459   support::ulittle16_t MajorVersion;
460   support::ulittle16_t MinorVersion;
461   support::ulittle32_t GlobalFlagsClear;
462   support::ulittle32_t GlobalFlagsSet;
463   support::ulittle32_t CriticalSectionDefaultTimeout;
464   support::ulittle32_t DeCommitFreeBlockThreshold;
465   support::ulittle32_t DeCommitTotalFreeThreshold;
466   support::ulittle32_t LockPrefixTable;
467   support::ulittle32_t MaximumAllocationSize;
468   support::ulittle32_t VirtualMemoryThreshold;
469   support::ulittle32_t ProcessAffinityMask;
470   support::ulittle32_t ProcessHeapFlags;
471   support::ulittle16_t CSDVersion;
472   support::ulittle16_t Reserved;
473   support::ulittle32_t EditList;
474   support::ulittle32_t SecurityCookie;
475   support::ulittle32_t SEHandlerTable;
476   support::ulittle32_t SEHandlerCount;
477 };
478
479 struct coff_runtime_function_x64 {
480   support::ulittle32_t BeginAddress;
481   support::ulittle32_t EndAddress;
482   support::ulittle32_t UnwindInformation;
483 };
484
485 struct coff_base_reloc_block_header {
486   support::ulittle32_t PageRVA;
487   support::ulittle32_t BlockSize;
488 };
489
490 struct coff_base_reloc_block_entry {
491   support::ulittle16_t Data;
492   int getType() const { return Data >> 12; }
493   int getOffset() const { return Data & ((1 << 12) - 1); }
494 };
495
496 class COFFObjectFile : public ObjectFile {
497 private:
498   friend class ImportDirectoryEntryRef;
499   friend class ExportDirectoryEntryRef;
500   const coff_file_header *COFFHeader;
501   const coff_bigobj_file_header *COFFBigObjHeader;
502   const pe32_header *PE32Header;
503   const pe32plus_header *PE32PlusHeader;
504   const data_directory *DataDirectory;
505   const coff_section *SectionTable;
506   const coff_symbol16 *SymbolTable16;
507   const coff_symbol32 *SymbolTable32;
508   const char *StringTable;
509   uint32_t StringTableSize;
510   const import_directory_table_entry *ImportDirectory;
511   uint32_t NumberOfImportDirectory;
512   const delay_import_directory_table_entry *DelayImportDirectory;
513   uint32_t NumberOfDelayImportDirectory;
514   const export_directory_table_entry *ExportDirectory;
515   const coff_base_reloc_block_header *BaseRelocHeader;
516   const coff_base_reloc_block_header *BaseRelocEnd;
517
518   std::error_code getString(uint32_t offset, StringRef &Res) const;
519
520   template <typename coff_symbol_type>
521   const coff_symbol_type *toSymb(DataRefImpl Symb) const;
522   const coff_section *toSec(DataRefImpl Sec) const;
523   const coff_relocation *toRel(DataRefImpl Rel) const;
524
525   std::error_code initSymbolTablePtr();
526   std::error_code initImportTablePtr();
527   std::error_code initDelayImportTablePtr();
528   std::error_code initExportTablePtr();
529   std::error_code initBaseRelocPtr();
530
531 public:
532   uintptr_t getSymbolTable() const {
533     if (SymbolTable16)
534       return reinterpret_cast<uintptr_t>(SymbolTable16);
535     if (SymbolTable32)
536       return reinterpret_cast<uintptr_t>(SymbolTable32);
537     return uintptr_t(0);
538   }
539   uint16_t getMachine() const {
540     if (COFFHeader)
541       return COFFHeader->Machine;
542     if (COFFBigObjHeader)
543       return COFFBigObjHeader->Machine;
544     llvm_unreachable("no COFF header!");
545   }
546   uint16_t getSizeOfOptionalHeader() const {
547     if (COFFHeader)
548       return COFFHeader->isImportLibrary() ? 0
549                                            : COFFHeader->SizeOfOptionalHeader;
550     // bigobj doesn't have this field.
551     if (COFFBigObjHeader)
552       return 0;
553     llvm_unreachable("no COFF header!");
554   }
555   uint16_t getCharacteristics() const {
556     if (COFFHeader)
557       return COFFHeader->isImportLibrary() ? 0 : COFFHeader->Characteristics;
558     // bigobj doesn't have characteristics to speak of,
559     // editbin will silently lie to you if you attempt to set any.
560     if (COFFBigObjHeader)
561       return 0;
562     llvm_unreachable("no COFF header!");
563   }
564   uint32_t getTimeDateStamp() const {
565     if (COFFHeader)
566       return COFFHeader->TimeDateStamp;
567     if (COFFBigObjHeader)
568       return COFFBigObjHeader->TimeDateStamp;
569     llvm_unreachable("no COFF header!");
570   }
571   uint32_t getNumberOfSections() const {
572     if (COFFHeader)
573       return COFFHeader->isImportLibrary() ? 0 : COFFHeader->NumberOfSections;
574     if (COFFBigObjHeader)
575       return COFFBigObjHeader->NumberOfSections;
576     llvm_unreachable("no COFF header!");
577   }
578   uint32_t getPointerToSymbolTable() const {
579     if (COFFHeader)
580       return COFFHeader->isImportLibrary() ? 0
581                                            : COFFHeader->PointerToSymbolTable;
582     if (COFFBigObjHeader)
583       return COFFBigObjHeader->PointerToSymbolTable;
584     llvm_unreachable("no COFF header!");
585   }
586   uint32_t getNumberOfSymbols() const {
587     if (COFFHeader)
588       return COFFHeader->isImportLibrary() ? 0 : COFFHeader->NumberOfSymbols;
589     if (COFFBigObjHeader)
590       return COFFBigObjHeader->NumberOfSymbols;
591     llvm_unreachable("no COFF header!");
592   }
593 protected:
594   void moveSymbolNext(DataRefImpl &Symb) const override;
595   std::error_code getSymbolName(DataRefImpl Symb,
596                                 StringRef &Res) const override;
597   std::error_code getSymbolAddress(DataRefImpl Symb,
598                                    uint64_t &Res) const override;
599   std::error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const override;
600   uint32_t getSymbolFlags(DataRefImpl Symb) const override;
601   std::error_code getSymbolType(DataRefImpl Symb,
602                                 SymbolRef::Type &Res) const override;
603   std::error_code getSymbolSection(DataRefImpl Symb,
604                                    section_iterator &Res) const override;
605   void moveSectionNext(DataRefImpl &Sec) const override;
606   std::error_code getSectionName(DataRefImpl Sec,
607                                  StringRef &Res) const override;
608   uint64_t getSectionAddress(DataRefImpl Sec) const override;
609   uint64_t getSectionSize(DataRefImpl Sec) const override;
610   std::error_code getSectionContents(DataRefImpl Sec,
611                                      StringRef &Res) const override;
612   uint64_t getSectionAlignment(DataRefImpl Sec) const override;
613   bool isSectionText(DataRefImpl Sec) const override;
614   bool isSectionData(DataRefImpl Sec) const override;
615   bool isSectionBSS(DataRefImpl Sec) const override;
616   bool isSectionVirtual(DataRefImpl Sec) const override;
617   bool sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb) const override;
618   relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
619   relocation_iterator section_rel_end(DataRefImpl Sec) const override;
620
621   void moveRelocationNext(DataRefImpl &Rel) const override;
622   std::error_code getRelocationAddress(DataRefImpl Rel,
623                                        uint64_t &Res) const override;
624   std::error_code getRelocationOffset(DataRefImpl Rel,
625                                       uint64_t &Res) const override;
626   symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
627   section_iterator getRelocationSection(DataRefImpl Rel) const override;
628   std::error_code getRelocationType(DataRefImpl Rel,
629                                     uint64_t &Res) const override;
630   std::error_code
631   getRelocationTypeName(DataRefImpl Rel,
632                         SmallVectorImpl<char> &Result) const override;
633   std::error_code
634   getRelocationValueString(DataRefImpl Rel,
635                            SmallVectorImpl<char> &Result) const override;
636
637 public:
638   COFFObjectFile(MemoryBufferRef Object, std::error_code &EC);
639   basic_symbol_iterator symbol_begin_impl() const override;
640   basic_symbol_iterator symbol_end_impl() const override;
641   section_iterator section_begin() const override;
642   section_iterator section_end() const override;
643
644   const coff_section *getCOFFSection(const SectionRef &Section) const;
645   COFFSymbolRef getCOFFSymbol(const DataRefImpl &Ref) const;
646   COFFSymbolRef getCOFFSymbol(const SymbolRef &Symbol) const;
647   const coff_relocation *getCOFFRelocation(const RelocationRef &Reloc) const;
648
649   uint8_t getBytesInAddress() const override;
650   StringRef getFileFormatName() const override;
651   unsigned getArch() const override;
652
653   import_directory_iterator import_directory_begin() const;
654   import_directory_iterator import_directory_end() const;
655   delay_import_directory_iterator delay_import_directory_begin() const;
656   delay_import_directory_iterator delay_import_directory_end() const;
657   export_directory_iterator export_directory_begin() const;
658   export_directory_iterator export_directory_end() const;
659   base_reloc_iterator base_reloc_begin() const;
660   base_reloc_iterator base_reloc_end() const;
661
662   iterator_range<import_directory_iterator> import_directories() const;
663   iterator_range<delay_import_directory_iterator>
664       delay_import_directories() const;
665   iterator_range<export_directory_iterator> export_directories() const;
666   iterator_range<base_reloc_iterator> base_relocs() const;
667
668   const dos_header *getDOSHeader() const {
669     if (!PE32Header && !PE32PlusHeader)
670       return nullptr;
671     return reinterpret_cast<const dos_header *>(base());
672   }
673   std::error_code getPE32Header(const pe32_header *&Res) const;
674   std::error_code getPE32PlusHeader(const pe32plus_header *&Res) const;
675   std::error_code getDataDirectory(uint32_t index,
676                                    const data_directory *&Res) const;
677   std::error_code getSection(int32_t index, const coff_section *&Res) const;
678   template <typename coff_symbol_type>
679   std::error_code getSymbol(uint32_t Index,
680                             const coff_symbol_type *&Res) const {
681     if (Index >= getNumberOfSymbols())
682       return object_error::parse_failed;
683
684     Res = reinterpret_cast<coff_symbol_type *>(getSymbolTable()) + Index;
685     return object_error::success;
686   }
687   ErrorOr<COFFSymbolRef> getSymbol(uint32_t index) const {
688     if (SymbolTable16) {
689       const coff_symbol16 *Symb = nullptr;
690       if (std::error_code EC = getSymbol(index, Symb))
691         return EC;
692       return COFFSymbolRef(Symb);
693     }
694     if (SymbolTable32) {
695       const coff_symbol32 *Symb = nullptr;
696       if (std::error_code EC = getSymbol(index, Symb))
697         return EC;
698       return COFFSymbolRef(Symb);
699     }
700     return object_error::parse_failed;
701   }
702   template <typename T>
703   std::error_code getAuxSymbol(uint32_t index, const T *&Res) const {
704     ErrorOr<COFFSymbolRef> s = getSymbol(index);
705     if (std::error_code EC = s.getError())
706       return EC;
707     Res = reinterpret_cast<const T *>(s->getRawPtr());
708     return object_error::success;
709   }
710   std::error_code getSymbolName(COFFSymbolRef Symbol, StringRef &Res) const;
711
712   ArrayRef<uint8_t> getSymbolAuxData(COFFSymbolRef Symbol) const;
713
714   size_t getSymbolTableEntrySize() const {
715     if (COFFHeader)
716       return sizeof(coff_symbol16);
717     if (COFFBigObjHeader)
718       return sizeof(coff_symbol32);
719     llvm_unreachable("null symbol table pointer!");
720   }
721
722   std::error_code getSectionName(const coff_section *Sec, StringRef &Res) const;
723   uint64_t getSectionSize(const coff_section *Sec) const;
724   std::error_code getSectionContents(const coff_section *Sec,
725                                      ArrayRef<uint8_t> &Res) const;
726
727   std::error_code getVaPtr(uint64_t VA, uintptr_t &Res) const;
728   std::error_code getRvaPtr(uint32_t Rva, uintptr_t &Res) const;
729   std::error_code getHintName(uint32_t Rva, uint16_t &Hint,
730                               StringRef &Name) const;
731
732   bool isRelocatableObject() const override;
733   bool is64() const { return PE32PlusHeader; }
734
735   static inline bool classof(const Binary *v) { return v->isCOFF(); }
736 };
737
738 // The iterator for the import directory table.
739 class ImportDirectoryEntryRef {
740 public:
741   ImportDirectoryEntryRef() : OwningObject(nullptr) {}
742   ImportDirectoryEntryRef(const import_directory_table_entry *Table, uint32_t I,
743                           const COFFObjectFile *Owner)
744       : ImportTable(Table), Index(I), OwningObject(Owner) {}
745
746   bool operator==(const ImportDirectoryEntryRef &Other) const;
747   void moveNext();
748
749   imported_symbol_iterator imported_symbol_begin() const;
750   imported_symbol_iterator imported_symbol_end() const;
751   iterator_range<imported_symbol_iterator> imported_symbols() const;
752
753   std::error_code getName(StringRef &Result) const;
754   std::error_code getImportLookupTableRVA(uint32_t &Result) const;
755   std::error_code getImportAddressTableRVA(uint32_t &Result) const;
756
757   std::error_code
758   getImportTableEntry(const import_directory_table_entry *&Result) const;
759
760   std::error_code
761   getImportLookupEntry(const import_lookup_table_entry32 *&Result) const;
762
763 private:
764   const import_directory_table_entry *ImportTable;
765   uint32_t Index;
766   const COFFObjectFile *OwningObject;
767 };
768
769 class DelayImportDirectoryEntryRef {
770 public:
771   DelayImportDirectoryEntryRef() : OwningObject(nullptr) {}
772   DelayImportDirectoryEntryRef(const delay_import_directory_table_entry *T,
773                                uint32_t I, const COFFObjectFile *Owner)
774       : Table(T), Index(I), OwningObject(Owner) {}
775
776   bool operator==(const DelayImportDirectoryEntryRef &Other) const;
777   void moveNext();
778
779   imported_symbol_iterator imported_symbol_begin() const;
780   imported_symbol_iterator imported_symbol_end() const;
781   iterator_range<imported_symbol_iterator> imported_symbols() const;
782
783   std::error_code getName(StringRef &Result) const;
784   std::error_code getDelayImportTable(
785       const delay_import_directory_table_entry *&Result) const;
786   std::error_code getImportAddress(int AddrIndex, uint64_t &Result) const;
787
788 private:
789   const delay_import_directory_table_entry *Table;
790   uint32_t Index;
791   const COFFObjectFile *OwningObject;
792 };
793
794 // The iterator for the export directory table entry.
795 class ExportDirectoryEntryRef {
796 public:
797   ExportDirectoryEntryRef() : OwningObject(nullptr) {}
798   ExportDirectoryEntryRef(const export_directory_table_entry *Table, uint32_t I,
799                           const COFFObjectFile *Owner)
800       : ExportTable(Table), Index(I), OwningObject(Owner) {}
801
802   bool operator==(const ExportDirectoryEntryRef &Other) const;
803   void moveNext();
804
805   std::error_code getDllName(StringRef &Result) const;
806   std::error_code getOrdinalBase(uint32_t &Result) const;
807   std::error_code getOrdinal(uint32_t &Result) const;
808   std::error_code getExportRVA(uint32_t &Result) const;
809   std::error_code getSymbolName(StringRef &Result) const;
810
811 private:
812   const export_directory_table_entry *ExportTable;
813   uint32_t Index;
814   const COFFObjectFile *OwningObject;
815 };
816
817 class ImportedSymbolRef {
818 public:
819   ImportedSymbolRef() : OwningObject(nullptr) {}
820   ImportedSymbolRef(const import_lookup_table_entry32 *Entry, uint32_t I,
821                     const COFFObjectFile *Owner)
822       : Entry32(Entry), Entry64(nullptr), Index(I), OwningObject(Owner) {}
823   ImportedSymbolRef(const import_lookup_table_entry64 *Entry, uint32_t I,
824                     const COFFObjectFile *Owner)
825       : Entry32(nullptr), Entry64(Entry), Index(I), OwningObject(Owner) {}
826
827   bool operator==(const ImportedSymbolRef &Other) const;
828   void moveNext();
829
830   std::error_code getSymbolName(StringRef &Result) const;
831   std::error_code getOrdinal(uint16_t &Result) const;
832
833 private:
834   const import_lookup_table_entry32 *Entry32;
835   const import_lookup_table_entry64 *Entry64;
836   uint32_t Index;
837   const COFFObjectFile *OwningObject;
838 };
839
840 class BaseRelocRef {
841 public:
842   BaseRelocRef() : OwningObject(nullptr) {}
843   BaseRelocRef(const coff_base_reloc_block_header *Header,
844                const COFFObjectFile *Owner)
845       : Header(Header), Index(0), OwningObject(Owner) {}
846
847   bool operator==(const BaseRelocRef &Other) const;
848   void moveNext();
849
850   std::error_code getType(uint8_t &Type) const;
851   std::error_code getRVA(uint32_t &Result) const;
852
853 private:
854   const coff_base_reloc_block_header *Header;
855   uint32_t Index;
856   const COFFObjectFile *OwningObject;
857 };
858
859 } // end namespace object
860 } // end namespace llvm
861
862 #endif