1 //===- COFFObjectFile.cpp - COFF object file implementation -----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the COFFObjectFile class.
12 //===----------------------------------------------------------------------===//
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 #include "llvm/Support/COFF.h"
20 #include "llvm/Support/Debug.h"
21 #include "llvm/Support/raw_ostream.h"
26 using namespace object;
28 using support::ulittle16_t;
29 using support::ulittle32_t;
30 using support::ulittle64_t;
31 using support::little16_t;
33 // Returns false if size is greater than the buffer size. And sets ec.
34 static bool checkSize(MemoryBufferRef M, std::error_code &EC, uint64_t Size) {
35 if (M.getBufferSize() < Size) {
36 EC = object_error::unexpected_eof;
42 static std::error_code checkOffset(MemoryBufferRef M, uintptr_t Addr,
43 const uint64_t Size) {
44 if (Addr + Size < Addr || Addr + Size < Size ||
45 Addr + Size > uintptr_t(M.getBufferEnd()) ||
46 Addr < uintptr_t(M.getBufferStart())) {
47 return object_error::unexpected_eof;
49 return object_error::success;
52 // Sets Obj unless any bytes in [addr, addr + size) fall outsize of m.
53 // Returns unexpected_eof if error.
55 static std::error_code getObject(const T *&Obj, MemoryBufferRef M,
57 const uint64_t Size = sizeof(T)) {
58 uintptr_t Addr = uintptr_t(Ptr);
59 if (std::error_code EC = checkOffset(M, Addr, Size))
61 Obj = reinterpret_cast<const T *>(Addr);
62 return object_error::success;
65 // Decode a string table entry in base 64 (//AAAAAA). Expects \arg Str without
67 static bool decodeBase64StringEntry(StringRef Str, uint32_t &Result) {
68 assert(Str.size() <= 6 && "String too long, possible overflow.");
73 while (!Str.empty()) {
75 if (Str[0] >= 'A' && Str[0] <= 'Z') // 0..25
76 CharVal = Str[0] - 'A';
77 else if (Str[0] >= 'a' && Str[0] <= 'z') // 26..51
78 CharVal = Str[0] - 'a' + 26;
79 else if (Str[0] >= '0' && Str[0] <= '9') // 52..61
80 CharVal = Str[0] - '0' + 52;
81 else if (Str[0] == '+') // 62
83 else if (Str[0] == '/') // 63
88 Value = (Value * 64) + CharVal;
92 if (Value > std::numeric_limits<uint32_t>::max())
95 Result = static_cast<uint32_t>(Value);
99 template <typename coff_symbol_type>
100 const coff_symbol_type *COFFObjectFile::toSymb(DataRefImpl Ref) const {
101 const coff_symbol_type *Addr =
102 reinterpret_cast<const coff_symbol_type *>(Ref.p);
104 assert(!checkOffset(Data, uintptr_t(Addr), sizeof(*Addr)));
106 // Verify that the symbol points to a valid entry in the symbol table.
107 uintptr_t Offset = uintptr_t(Addr) - uintptr_t(base());
109 assert((Offset - getPointerToSymbolTable()) % sizeof(coff_symbol_type) == 0 &&
110 "Symbol did not point to the beginning of a symbol");
116 const coff_section *COFFObjectFile::toSec(DataRefImpl Ref) const {
117 const coff_section *Addr = reinterpret_cast<const coff_section*>(Ref.p);
120 // Verify that the section points to a valid entry in the section table.
121 if (Addr < SectionTable || Addr >= (SectionTable + getNumberOfSections()))
122 report_fatal_error("Section was outside of section table.");
124 uintptr_t Offset = uintptr_t(Addr) - uintptr_t(SectionTable);
125 assert(Offset % sizeof(coff_section) == 0 &&
126 "Section did not point to the beginning of a section");
132 void COFFObjectFile::moveSymbolNext(DataRefImpl &Ref) const {
133 auto End = reinterpret_cast<uintptr_t>(StringTable);
135 const coff_symbol16 *Symb = toSymb<coff_symbol16>(Ref);
136 Symb += 1 + Symb->NumberOfAuxSymbols;
137 Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End);
138 } else if (SymbolTable32) {
139 const coff_symbol32 *Symb = toSymb<coff_symbol32>(Ref);
140 Symb += 1 + Symb->NumberOfAuxSymbols;
141 Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End);
143 llvm_unreachable("no symbol table pointer!");
147 std::error_code COFFObjectFile::getSymbolName(DataRefImpl Ref,
148 StringRef &Result) const {
149 COFFSymbolRef Symb = getCOFFSymbol(Ref);
150 return getSymbolName(Symb, Result);
153 std::error_code COFFObjectFile::getSymbolAddress(DataRefImpl Ref,
154 uint64_t &Result) const {
155 COFFSymbolRef Symb = getCOFFSymbol(Ref);
157 if (Symb.isAnyUndefined()) {
158 Result = UnknownAddressOrSize;
159 return object_error::success;
161 if (Symb.isCommon()) {
162 Result = UnknownAddressOrSize;
163 return object_error::success;
165 int32_t SectionNumber = Symb.getSectionNumber();
166 if (!COFF::isReservedSectionNumber(SectionNumber)) {
167 const coff_section *Section = nullptr;
168 if (std::error_code EC = getSection(SectionNumber, Section))
171 Result = Section->VirtualAddress + Symb.getValue();
172 return object_error::success;
175 Result = Symb.getValue();
176 return object_error::success;
179 std::error_code COFFObjectFile::getSymbolType(DataRefImpl Ref,
180 SymbolRef::Type &Result) const {
181 COFFSymbolRef Symb = getCOFFSymbol(Ref);
182 int32_t SectionNumber = Symb.getSectionNumber();
183 Result = SymbolRef::ST_Other;
185 if (Symb.isAnyUndefined()) {
186 Result = SymbolRef::ST_Unknown;
187 } else if (Symb.isFunctionDefinition()) {
188 Result = SymbolRef::ST_Function;
189 } else if (Symb.isCommon()) {
190 Result = SymbolRef::ST_Data;
191 } else if (Symb.isFileRecord()) {
192 Result = SymbolRef::ST_File;
193 } else if (SectionNumber == COFF::IMAGE_SYM_DEBUG ||
194 Symb.isSectionDefinition()) {
195 // TODO: perhaps we need a new symbol type ST_Section.
196 Result = SymbolRef::ST_Debug;
197 } else if (!COFF::isReservedSectionNumber(SectionNumber)) {
198 const coff_section *Section = nullptr;
199 if (std::error_code EC = getSection(SectionNumber, Section))
201 uint32_t Characteristics = Section->Characteristics;
202 if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
203 Result = SymbolRef::ST_Function;
204 else if (Characteristics & (COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
205 COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA))
206 Result = SymbolRef::ST_Data;
208 return object_error::success;
211 uint32_t COFFObjectFile::getSymbolFlags(DataRefImpl Ref) const {
212 COFFSymbolRef Symb = getCOFFSymbol(Ref);
213 uint32_t Result = SymbolRef::SF_None;
215 if (Symb.isExternal() || Symb.isWeakExternal())
216 Result |= SymbolRef::SF_Global;
218 if (Symb.isWeakExternal())
219 Result |= SymbolRef::SF_Weak;
221 if (Symb.getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE)
222 Result |= SymbolRef::SF_Absolute;
224 if (Symb.isFileRecord())
225 Result |= SymbolRef::SF_FormatSpecific;
227 if (Symb.isSectionDefinition())
228 Result |= SymbolRef::SF_FormatSpecific;
231 Result |= SymbolRef::SF_Common;
233 if (Symb.isAnyUndefined())
234 Result |= SymbolRef::SF_Undefined;
239 std::error_code COFFObjectFile::getSymbolSize(DataRefImpl Ref,
240 uint64_t &Result) const {
241 COFFSymbolRef Symb = getCOFFSymbol(Ref);
244 Result = Symb.getValue();
246 Result = UnknownAddressOrSize;
248 return object_error::success;
252 COFFObjectFile::getSymbolSection(DataRefImpl Ref,
253 section_iterator &Result) const {
254 COFFSymbolRef Symb = getCOFFSymbol(Ref);
255 if (COFF::isReservedSectionNumber(Symb.getSectionNumber())) {
256 Result = section_end();
258 const coff_section *Sec = nullptr;
259 if (std::error_code EC = getSection(Symb.getSectionNumber(), Sec))
262 Ref.p = reinterpret_cast<uintptr_t>(Sec);
263 Result = section_iterator(SectionRef(Ref, this));
265 return object_error::success;
268 void COFFObjectFile::moveSectionNext(DataRefImpl &Ref) const {
269 const coff_section *Sec = toSec(Ref);
271 Ref.p = reinterpret_cast<uintptr_t>(Sec);
274 std::error_code COFFObjectFile::getSectionName(DataRefImpl Ref,
275 StringRef &Result) const {
276 const coff_section *Sec = toSec(Ref);
277 return getSectionName(Sec, Result);
280 uint64_t COFFObjectFile::getSectionAddress(DataRefImpl Ref) const {
281 const coff_section *Sec = toSec(Ref);
282 return Sec->VirtualAddress;
285 uint64_t COFFObjectFile::getSectionSize(DataRefImpl Ref) const {
286 return getSectionSize(toSec(Ref));
289 std::error_code COFFObjectFile::getSectionContents(DataRefImpl Ref,
290 StringRef &Result) const {
291 const coff_section *Sec = toSec(Ref);
292 ArrayRef<uint8_t> Res;
293 std::error_code EC = getSectionContents(Sec, Res);
294 Result = StringRef(reinterpret_cast<const char*>(Res.data()), Res.size());
298 uint64_t COFFObjectFile::getSectionAlignment(DataRefImpl Ref) const {
299 const coff_section *Sec = toSec(Ref);
300 return uint64_t(1) << (((Sec->Characteristics & 0x00F00000) >> 20) - 1);
303 bool COFFObjectFile::isSectionText(DataRefImpl Ref) const {
304 const coff_section *Sec = toSec(Ref);
305 return Sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
308 bool COFFObjectFile::isSectionData(DataRefImpl Ref) const {
309 const coff_section *Sec = toSec(Ref);
310 return Sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
313 bool COFFObjectFile::isSectionBSS(DataRefImpl Ref) const {
314 const coff_section *Sec = toSec(Ref);
315 const uint32_t BssFlags = COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
316 COFF::IMAGE_SCN_MEM_READ |
317 COFF::IMAGE_SCN_MEM_WRITE;
318 return (Sec->Characteristics & BssFlags) == BssFlags;
321 bool COFFObjectFile::isSectionVirtual(DataRefImpl Ref) const {
322 const coff_section *Sec = toSec(Ref);
323 // In COFF, a virtual section won't have any in-file
324 // content, so the file pointer to the content will be zero.
325 return Sec->PointerToRawData == 0;
328 bool COFFObjectFile::sectionContainsSymbol(DataRefImpl SecRef,
329 DataRefImpl SymbRef) const {
330 const coff_section *Sec = toSec(SecRef);
331 COFFSymbolRef Symb = getCOFFSymbol(SymbRef);
332 int32_t SecNumber = (Sec - SectionTable) + 1;
333 return SecNumber == Symb.getSectionNumber();
336 static uint32_t getNumberOfRelocations(const coff_section *Sec,
337 MemoryBufferRef M, const uint8_t *base) {
338 // The field for the number of relocations in COFF section table is only
339 // 16-bit wide. If a section has more than 65535 relocations, 0xFFFF is set to
340 // NumberOfRelocations field, and the actual relocation count is stored in the
341 // VirtualAddress field in the first relocation entry.
342 if (Sec->hasExtendedRelocations()) {
343 const coff_relocation *FirstReloc;
344 if (getObject(FirstReloc, M, reinterpret_cast<const coff_relocation*>(
345 base + Sec->PointerToRelocations)))
347 // -1 to exclude this first relocation entry.
348 return FirstReloc->VirtualAddress - 1;
350 return Sec->NumberOfRelocations;
353 static const coff_relocation *
354 getFirstReloc(const coff_section *Sec, MemoryBufferRef M, const uint8_t *Base) {
355 uint64_t NumRelocs = getNumberOfRelocations(Sec, M, Base);
358 auto begin = reinterpret_cast<const coff_relocation *>(
359 Base + Sec->PointerToRelocations);
360 if (Sec->hasExtendedRelocations()) {
361 // Skip the first relocation entry repurposed to store the number of
365 if (checkOffset(M, uintptr_t(begin), sizeof(coff_relocation) * NumRelocs))
370 relocation_iterator COFFObjectFile::section_rel_begin(DataRefImpl Ref) const {
371 const coff_section *Sec = toSec(Ref);
372 const coff_relocation *begin = getFirstReloc(Sec, Data, base());
374 Ret.p = reinterpret_cast<uintptr_t>(begin);
375 return relocation_iterator(RelocationRef(Ret, this));
378 relocation_iterator COFFObjectFile::section_rel_end(DataRefImpl Ref) const {
379 const coff_section *Sec = toSec(Ref);
380 const coff_relocation *I = getFirstReloc(Sec, Data, base());
382 I += getNumberOfRelocations(Sec, Data, base());
384 Ret.p = reinterpret_cast<uintptr_t>(I);
385 return relocation_iterator(RelocationRef(Ret, this));
388 // Initialize the pointer to the symbol table.
389 std::error_code COFFObjectFile::initSymbolTablePtr() {
391 if (std::error_code EC = getObject(
392 SymbolTable16, Data, base() + getPointerToSymbolTable(),
393 (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
396 if (COFFBigObjHeader)
397 if (std::error_code EC = getObject(
398 SymbolTable32, Data, base() + getPointerToSymbolTable(),
399 (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
402 // Find string table. The first four byte of the string table contains the
403 // total size of the string table, including the size field itself. If the
404 // string table is empty, the value of the first four byte would be 4.
405 uint32_t StringTableOffset = getPointerToSymbolTable() +
406 getNumberOfSymbols() * getSymbolTableEntrySize();
407 const uint8_t *StringTableAddr = base() + StringTableOffset;
408 const ulittle32_t *StringTableSizePtr;
409 if (std::error_code EC = getObject(StringTableSizePtr, Data, StringTableAddr))
411 StringTableSize = *StringTableSizePtr;
412 if (std::error_code EC =
413 getObject(StringTable, Data, StringTableAddr, StringTableSize))
416 // Treat table sizes < 4 as empty because contrary to the PECOFF spec, some
417 // tools like cvtres write a size of 0 for an empty table instead of 4.
418 if (StringTableSize < 4)
421 // Check that the string table is null terminated if has any in it.
422 if (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)
423 return object_error::parse_failed;
424 return object_error::success;
427 // Returns the file offset for the given VA.
428 std::error_code COFFObjectFile::getVaPtr(uint64_t Addr, uintptr_t &Res) const {
429 uint64_t ImageBase = PE32Header ? (uint64_t)PE32Header->ImageBase
430 : (uint64_t)PE32PlusHeader->ImageBase;
431 uint64_t Rva = Addr - ImageBase;
432 assert(Rva <= UINT32_MAX);
433 return getRvaPtr((uint32_t)Rva, Res);
436 // Returns the file offset for the given RVA.
437 std::error_code COFFObjectFile::getRvaPtr(uint32_t Addr, uintptr_t &Res) const {
438 for (const SectionRef &S : sections()) {
439 const coff_section *Section = getCOFFSection(S);
440 uint32_t SectionStart = Section->VirtualAddress;
441 uint32_t SectionEnd = Section->VirtualAddress + Section->VirtualSize;
442 if (SectionStart <= Addr && Addr < SectionEnd) {
443 uint32_t Offset = Addr - SectionStart;
444 Res = uintptr_t(base()) + Section->PointerToRawData + Offset;
445 return object_error::success;
448 return object_error::parse_failed;
451 // Returns hint and name fields, assuming \p Rva is pointing to a Hint/Name
453 std::error_code COFFObjectFile::getHintName(uint32_t Rva, uint16_t &Hint,
454 StringRef &Name) const {
455 uintptr_t IntPtr = 0;
456 if (std::error_code EC = getRvaPtr(Rva, IntPtr))
458 const uint8_t *Ptr = reinterpret_cast<const uint8_t *>(IntPtr);
459 Hint = *reinterpret_cast<const ulittle16_t *>(Ptr);
460 Name = StringRef(reinterpret_cast<const char *>(Ptr + 2));
461 return object_error::success;
464 // Find the import table.
465 std::error_code COFFObjectFile::initImportTablePtr() {
466 // First, we get the RVA of the import table. If the file lacks a pointer to
467 // the import table, do nothing.
468 const data_directory *DataEntry;
469 if (getDataDirectory(COFF::IMPORT_TABLE, DataEntry))
470 return object_error::success;
472 // Do nothing if the pointer to import table is NULL.
473 if (DataEntry->RelativeVirtualAddress == 0)
474 return object_error::success;
476 uint32_t ImportTableRva = DataEntry->RelativeVirtualAddress;
477 // -1 because the last entry is the null entry.
478 NumberOfImportDirectory = DataEntry->Size /
479 sizeof(import_directory_table_entry) - 1;
481 // Find the section that contains the RVA. This is needed because the RVA is
482 // the import table's memory address which is different from its file offset.
483 uintptr_t IntPtr = 0;
484 if (std::error_code EC = getRvaPtr(ImportTableRva, IntPtr))
486 ImportDirectory = reinterpret_cast<
487 const import_directory_table_entry *>(IntPtr);
488 return object_error::success;
491 // Initializes DelayImportDirectory and NumberOfDelayImportDirectory.
492 std::error_code COFFObjectFile::initDelayImportTablePtr() {
493 const data_directory *DataEntry;
494 if (getDataDirectory(COFF::DELAY_IMPORT_DESCRIPTOR, DataEntry))
495 return object_error::success;
496 if (DataEntry->RelativeVirtualAddress == 0)
497 return object_error::success;
499 uint32_t RVA = DataEntry->RelativeVirtualAddress;
500 NumberOfDelayImportDirectory = DataEntry->Size /
501 sizeof(delay_import_directory_table_entry) - 1;
503 uintptr_t IntPtr = 0;
504 if (std::error_code EC = getRvaPtr(RVA, IntPtr))
506 DelayImportDirectory = reinterpret_cast<
507 const delay_import_directory_table_entry *>(IntPtr);
508 return object_error::success;
511 // Find the export table.
512 std::error_code COFFObjectFile::initExportTablePtr() {
513 // First, we get the RVA of the export table. If the file lacks a pointer to
514 // the export table, do nothing.
515 const data_directory *DataEntry;
516 if (getDataDirectory(COFF::EXPORT_TABLE, DataEntry))
517 return object_error::success;
519 // Do nothing if the pointer to export table is NULL.
520 if (DataEntry->RelativeVirtualAddress == 0)
521 return object_error::success;
523 uint32_t ExportTableRva = DataEntry->RelativeVirtualAddress;
524 uintptr_t IntPtr = 0;
525 if (std::error_code EC = getRvaPtr(ExportTableRva, IntPtr))
528 reinterpret_cast<const export_directory_table_entry *>(IntPtr);
529 return object_error::success;
532 std::error_code COFFObjectFile::initBaseRelocPtr() {
533 const data_directory *DataEntry;
534 if (getDataDirectory(COFF::BASE_RELOCATION_TABLE, DataEntry))
535 return object_error::success;
536 if (DataEntry->RelativeVirtualAddress == 0)
537 return object_error::success;
539 uintptr_t IntPtr = 0;
540 if (std::error_code EC = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr))
542 BaseRelocHeader = reinterpret_cast<const coff_base_reloc_block_header *>(
544 BaseRelocEnd = reinterpret_cast<coff_base_reloc_block_header *>(
545 IntPtr + DataEntry->Size);
546 return object_error::success;
549 COFFObjectFile::COFFObjectFile(MemoryBufferRef Object, std::error_code &EC)
550 : ObjectFile(Binary::ID_COFF, Object), COFFHeader(nullptr),
551 COFFBigObjHeader(nullptr), PE32Header(nullptr), PE32PlusHeader(nullptr),
552 DataDirectory(nullptr), SectionTable(nullptr), SymbolTable16(nullptr),
553 SymbolTable32(nullptr), StringTable(nullptr), StringTableSize(0),
554 ImportDirectory(nullptr), NumberOfImportDirectory(0),
555 DelayImportDirectory(nullptr), NumberOfDelayImportDirectory(0),
556 ExportDirectory(nullptr), BaseRelocHeader(nullptr),
557 BaseRelocEnd(nullptr) {
558 // Check that we at least have enough room for a header.
559 if (!checkSize(Data, EC, sizeof(coff_file_header)))
562 // The current location in the file where we are looking at.
565 // PE header is optional and is present only in executables. If it exists,
566 // it is placed right after COFF header.
567 bool HasPEHeader = false;
569 // Check if this is a PE/COFF file.
570 if (checkSize(Data, EC, sizeof(dos_header) + sizeof(COFF::PEMagic))) {
571 // PE/COFF, seek through MS-DOS compatibility stub and 4-byte
572 // PE signature to find 'normal' COFF header.
573 const auto *DH = reinterpret_cast<const dos_header *>(base());
574 if (DH->Magic[0] == 'M' && DH->Magic[1] == 'Z') {
575 CurPtr = DH->AddressOfNewExeHeader;
576 // Check the PE magic bytes. ("PE\0\0")
577 if (memcmp(base() + CurPtr, COFF::PEMagic, sizeof(COFF::PEMagic)) != 0) {
578 EC = object_error::parse_failed;
581 CurPtr += sizeof(COFF::PEMagic); // Skip the PE magic bytes.
586 if ((EC = getObject(COFFHeader, Data, base() + CurPtr)))
589 // It might be a bigobj file, let's check. Note that COFF bigobj and COFF
590 // import libraries share a common prefix but bigobj is more restrictive.
591 if (!HasPEHeader && COFFHeader->Machine == COFF::IMAGE_FILE_MACHINE_UNKNOWN &&
592 COFFHeader->NumberOfSections == uint16_t(0xffff) &&
593 checkSize(Data, EC, sizeof(coff_bigobj_file_header))) {
594 if ((EC = getObject(COFFBigObjHeader, Data, base() + CurPtr)))
597 // Verify that we are dealing with bigobj.
598 if (COFFBigObjHeader->Version >= COFF::BigObjHeader::MinBigObjectVersion &&
599 std::memcmp(COFFBigObjHeader->UUID, COFF::BigObjMagic,
600 sizeof(COFF::BigObjMagic)) == 0) {
601 COFFHeader = nullptr;
602 CurPtr += sizeof(coff_bigobj_file_header);
604 // It's not a bigobj.
605 COFFBigObjHeader = nullptr;
609 // The prior checkSize call may have failed. This isn't a hard error
610 // because we were just trying to sniff out bigobj.
611 EC = object_error::success;
612 CurPtr += sizeof(coff_file_header);
614 if (COFFHeader->isImportLibrary())
619 const pe32_header *Header;
620 if ((EC = getObject(Header, Data, base() + CurPtr)))
623 const uint8_t *DataDirAddr;
624 uint64_t DataDirSize;
625 if (Header->Magic == COFF::PE32Header::PE32) {
627 DataDirAddr = base() + CurPtr + sizeof(pe32_header);
628 DataDirSize = sizeof(data_directory) * PE32Header->NumberOfRvaAndSize;
629 } else if (Header->Magic == COFF::PE32Header::PE32_PLUS) {
630 PE32PlusHeader = reinterpret_cast<const pe32plus_header *>(Header);
631 DataDirAddr = base() + CurPtr + sizeof(pe32plus_header);
632 DataDirSize = sizeof(data_directory) * PE32PlusHeader->NumberOfRvaAndSize;
634 // It's neither PE32 nor PE32+.
635 EC = object_error::parse_failed;
638 if ((EC = getObject(DataDirectory, Data, DataDirAddr, DataDirSize)))
640 CurPtr += COFFHeader->SizeOfOptionalHeader;
643 if ((EC = getObject(SectionTable, Data, base() + CurPtr,
644 (uint64_t)getNumberOfSections() * sizeof(coff_section))))
647 // Initialize the pointer to the symbol table.
648 if (getPointerToSymbolTable() != 0) {
649 if ((EC = initSymbolTablePtr()))
652 // We had better not have any symbols if we don't have a symbol table.
653 if (getNumberOfSymbols() != 0) {
654 EC = object_error::parse_failed;
659 // Initialize the pointer to the beginning of the import table.
660 if ((EC = initImportTablePtr()))
662 if ((EC = initDelayImportTablePtr()))
665 // Initialize the pointer to the export table.
666 if ((EC = initExportTablePtr()))
669 // Initialize the pointer to the base relocation table.
670 if ((EC = initBaseRelocPtr()))
673 EC = object_error::success;
676 basic_symbol_iterator COFFObjectFile::symbol_begin_impl() const {
678 Ret.p = getSymbolTable();
679 return basic_symbol_iterator(SymbolRef(Ret, this));
682 basic_symbol_iterator COFFObjectFile::symbol_end_impl() const {
683 // The symbol table ends where the string table begins.
685 Ret.p = reinterpret_cast<uintptr_t>(StringTable);
686 return basic_symbol_iterator(SymbolRef(Ret, this));
689 import_directory_iterator COFFObjectFile::import_directory_begin() const {
690 return import_directory_iterator(
691 ImportDirectoryEntryRef(ImportDirectory, 0, this));
694 import_directory_iterator COFFObjectFile::import_directory_end() const {
695 return import_directory_iterator(
696 ImportDirectoryEntryRef(ImportDirectory, NumberOfImportDirectory, this));
699 delay_import_directory_iterator
700 COFFObjectFile::delay_import_directory_begin() const {
701 return delay_import_directory_iterator(
702 DelayImportDirectoryEntryRef(DelayImportDirectory, 0, this));
705 delay_import_directory_iterator
706 COFFObjectFile::delay_import_directory_end() const {
707 return delay_import_directory_iterator(
708 DelayImportDirectoryEntryRef(
709 DelayImportDirectory, NumberOfDelayImportDirectory, this));
712 export_directory_iterator COFFObjectFile::export_directory_begin() const {
713 return export_directory_iterator(
714 ExportDirectoryEntryRef(ExportDirectory, 0, this));
717 export_directory_iterator COFFObjectFile::export_directory_end() const {
718 if (!ExportDirectory)
719 return export_directory_iterator(ExportDirectoryEntryRef(nullptr, 0, this));
720 ExportDirectoryEntryRef Ref(ExportDirectory,
721 ExportDirectory->AddressTableEntries, this);
722 return export_directory_iterator(Ref);
725 section_iterator COFFObjectFile::section_begin() const {
727 Ret.p = reinterpret_cast<uintptr_t>(SectionTable);
728 return section_iterator(SectionRef(Ret, this));
731 section_iterator COFFObjectFile::section_end() const {
734 COFFHeader && COFFHeader->isImportLibrary() ? 0 : getNumberOfSections();
735 Ret.p = reinterpret_cast<uintptr_t>(SectionTable + NumSections);
736 return section_iterator(SectionRef(Ret, this));
739 base_reloc_iterator COFFObjectFile::base_reloc_begin() const {
740 return base_reloc_iterator(BaseRelocRef(BaseRelocHeader, this));
743 base_reloc_iterator COFFObjectFile::base_reloc_end() const {
744 return base_reloc_iterator(BaseRelocRef(BaseRelocEnd, this));
747 uint8_t COFFObjectFile::getBytesInAddress() const {
748 return getArch() == Triple::x86_64 ? 8 : 4;
751 StringRef COFFObjectFile::getFileFormatName() const {
752 switch(getMachine()) {
753 case COFF::IMAGE_FILE_MACHINE_I386:
755 case COFF::IMAGE_FILE_MACHINE_AMD64:
756 return "COFF-x86-64";
757 case COFF::IMAGE_FILE_MACHINE_ARMNT:
760 return "COFF-<unknown arch>";
764 unsigned COFFObjectFile::getArch() const {
765 switch (getMachine()) {
766 case COFF::IMAGE_FILE_MACHINE_I386:
768 case COFF::IMAGE_FILE_MACHINE_AMD64:
769 return Triple::x86_64;
770 case COFF::IMAGE_FILE_MACHINE_ARMNT:
771 return Triple::thumb;
773 return Triple::UnknownArch;
777 iterator_range<import_directory_iterator>
778 COFFObjectFile::import_directories() const {
779 return make_range(import_directory_begin(), import_directory_end());
782 iterator_range<delay_import_directory_iterator>
783 COFFObjectFile::delay_import_directories() const {
784 return make_range(delay_import_directory_begin(),
785 delay_import_directory_end());
788 iterator_range<export_directory_iterator>
789 COFFObjectFile::export_directories() const {
790 return make_range(export_directory_begin(), export_directory_end());
793 iterator_range<base_reloc_iterator> COFFObjectFile::base_relocs() const {
794 return make_range(base_reloc_begin(), base_reloc_end());
797 std::error_code COFFObjectFile::getPE32Header(const pe32_header *&Res) const {
799 return object_error::success;
803 COFFObjectFile::getPE32PlusHeader(const pe32plus_header *&Res) const {
804 Res = PE32PlusHeader;
805 return object_error::success;
809 COFFObjectFile::getDataDirectory(uint32_t Index,
810 const data_directory *&Res) const {
811 // Error if if there's no data directory or the index is out of range.
812 if (!DataDirectory) {
814 return object_error::parse_failed;
816 assert(PE32Header || PE32PlusHeader);
817 uint32_t NumEnt = PE32Header ? PE32Header->NumberOfRvaAndSize
818 : PE32PlusHeader->NumberOfRvaAndSize;
819 if (Index >= NumEnt) {
821 return object_error::parse_failed;
823 Res = &DataDirectory[Index];
824 return object_error::success;
827 std::error_code COFFObjectFile::getSection(int32_t Index,
828 const coff_section *&Result) const {
830 if (COFF::isReservedSectionNumber(Index))
831 return object_error::success;
832 if (static_cast<uint32_t>(Index) <= getNumberOfSections()) {
833 // We already verified the section table data, so no need to check again.
834 Result = SectionTable + (Index - 1);
835 return object_error::success;
837 return object_error::parse_failed;
840 std::error_code COFFObjectFile::getString(uint32_t Offset,
841 StringRef &Result) const {
842 if (StringTableSize <= 4)
843 // Tried to get a string from an empty string table.
844 return object_error::parse_failed;
845 if (Offset >= StringTableSize)
846 return object_error::unexpected_eof;
847 Result = StringRef(StringTable + Offset);
848 return object_error::success;
851 std::error_code COFFObjectFile::getSymbolName(COFFSymbolRef Symbol,
852 StringRef &Res) const {
853 // Check for string table entry. First 4 bytes are 0.
854 if (Symbol.getStringTableOffset().Zeroes == 0) {
855 uint32_t Offset = Symbol.getStringTableOffset().Offset;
856 if (std::error_code EC = getString(Offset, Res))
858 return object_error::success;
861 if (Symbol.getShortName()[COFF::NameSize - 1] == 0)
862 // Null terminated, let ::strlen figure out the length.
863 Res = StringRef(Symbol.getShortName());
865 // Not null terminated, use all 8 bytes.
866 Res = StringRef(Symbol.getShortName(), COFF::NameSize);
867 return object_error::success;
871 COFFObjectFile::getSymbolAuxData(COFFSymbolRef Symbol) const {
872 const uint8_t *Aux = nullptr;
874 size_t SymbolSize = getSymbolTableEntrySize();
875 if (Symbol.getNumberOfAuxSymbols() > 0) {
876 // AUX data comes immediately after the symbol in COFF
877 Aux = reinterpret_cast<const uint8_t *>(Symbol.getRawPtr()) + SymbolSize;
879 // Verify that the Aux symbol points to a valid entry in the symbol table.
880 uintptr_t Offset = uintptr_t(Aux) - uintptr_t(base());
881 if (Offset < getPointerToSymbolTable() ||
883 getPointerToSymbolTable() + (getNumberOfSymbols() * SymbolSize))
884 report_fatal_error("Aux Symbol data was outside of symbol table.");
886 assert((Offset - getPointerToSymbolTable()) % SymbolSize == 0 &&
887 "Aux Symbol data did not point to the beginning of a symbol");
890 return makeArrayRef(Aux, Symbol.getNumberOfAuxSymbols() * SymbolSize);
893 std::error_code COFFObjectFile::getSectionName(const coff_section *Sec,
894 StringRef &Res) const {
896 if (Sec->Name[COFF::NameSize - 1] == 0)
897 // Null terminated, let ::strlen figure out the length.
900 // Not null terminated, use all 8 bytes.
901 Name = StringRef(Sec->Name, COFF::NameSize);
903 // Check for string table entry. First byte is '/'.
904 if (Name.startswith("/")) {
906 if (Name.startswith("//")) {
907 if (decodeBase64StringEntry(Name.substr(2), Offset))
908 return object_error::parse_failed;
910 if (Name.substr(1).getAsInteger(10, Offset))
911 return object_error::parse_failed;
913 if (std::error_code EC = getString(Offset, Name))
918 return object_error::success;
921 uint64_t COFFObjectFile::getSectionSize(const coff_section *Sec) const {
922 // SizeOfRawData and VirtualSize change what they represent depending on
923 // whether or not we have an executable image.
925 // For object files, SizeOfRawData contains the size of section's data;
926 // VirtualSize is always zero.
928 // For executables, SizeOfRawData *must* be a multiple of FileAlignment; the
929 // actual section size is in VirtualSize. It is possible for VirtualSize to
930 // be greater than SizeOfRawData; the contents past that point should be
931 // considered to be zero.
932 uint32_t SectionSize;
933 if (Sec->VirtualSize)
934 SectionSize = std::min(Sec->VirtualSize, Sec->SizeOfRawData);
936 SectionSize = Sec->SizeOfRawData;
942 COFFObjectFile::getSectionContents(const coff_section *Sec,
943 ArrayRef<uint8_t> &Res) const {
944 // PointerToRawData and SizeOfRawData won't make sense for BSS sections,
945 // don't do anything interesting for them.
946 assert((Sec->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) == 0 &&
947 "BSS sections don't have contents!");
948 // The only thing that we need to verify is that the contents is contained
949 // within the file bounds. We don't need to make sure it doesn't cover other
950 // data, as there's nothing that says that is not allowed.
951 uintptr_t ConStart = uintptr_t(base()) + Sec->PointerToRawData;
952 uint32_t SectionSize = getSectionSize(Sec);
953 if (checkOffset(Data, ConStart, SectionSize))
954 return object_error::parse_failed;
955 Res = makeArrayRef(reinterpret_cast<const uint8_t *>(ConStart), SectionSize);
956 return object_error::success;
959 const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
960 return reinterpret_cast<const coff_relocation*>(Rel.p);
963 void COFFObjectFile::moveRelocationNext(DataRefImpl &Rel) const {
964 Rel.p = reinterpret_cast<uintptr_t>(
965 reinterpret_cast<const coff_relocation*>(Rel.p) + 1);
968 std::error_code COFFObjectFile::getRelocationAddress(DataRefImpl Rel,
969 uint64_t &Res) const {
970 report_fatal_error("getRelocationAddress not implemented in COFFObjectFile");
973 std::error_code COFFObjectFile::getRelocationOffset(DataRefImpl Rel,
974 uint64_t &Res) const {
975 const coff_relocation *R = toRel(Rel);
976 const support::ulittle32_t *VirtualAddressPtr;
977 if (std::error_code EC =
978 getObject(VirtualAddressPtr, Data, &R->VirtualAddress))
980 Res = *VirtualAddressPtr;
981 return object_error::success;
984 symbol_iterator COFFObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
985 const coff_relocation *R = toRel(Rel);
987 if (R->SymbolTableIndex >= getNumberOfSymbols())
990 Ref.p = reinterpret_cast<uintptr_t>(SymbolTable16 + R->SymbolTableIndex);
991 else if (SymbolTable32)
992 Ref.p = reinterpret_cast<uintptr_t>(SymbolTable32 + R->SymbolTableIndex);
994 llvm_unreachable("no symbol table pointer!");
995 return symbol_iterator(SymbolRef(Ref, this));
998 section_iterator COFFObjectFile::getRelocationSection(DataRefImpl Rel) const {
999 symbol_iterator Sym = getRelocationSymbol(Rel);
1000 if (Sym == symbol_end())
1001 return section_end();
1002 COFFSymbolRef Symb = getCOFFSymbol(*Sym);
1003 if (!Symb.isSection())
1004 return section_end();
1005 section_iterator Res(section_end());
1006 if (getSymbolSection(Sym->getRawDataRefImpl(),Res))
1007 return section_end();
1011 std::error_code COFFObjectFile::getRelocationType(DataRefImpl Rel,
1012 uint64_t &Res) const {
1013 const coff_relocation* R = toRel(Rel);
1015 return object_error::success;
1018 const coff_section *
1019 COFFObjectFile::getCOFFSection(const SectionRef &Section) const {
1020 return toSec(Section.getRawDataRefImpl());
1023 COFFSymbolRef COFFObjectFile::getCOFFSymbol(const DataRefImpl &Ref) const {
1025 return toSymb<coff_symbol16>(Ref);
1027 return toSymb<coff_symbol32>(Ref);
1028 llvm_unreachable("no symbol table pointer!");
1031 COFFSymbolRef COFFObjectFile::getCOFFSymbol(const SymbolRef &Symbol) const {
1032 return getCOFFSymbol(Symbol.getRawDataRefImpl());
1035 const coff_relocation *
1036 COFFObjectFile::getCOFFRelocation(const RelocationRef &Reloc) const {
1037 return toRel(Reloc.getRawDataRefImpl());
1040 #define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(reloc_type) \
1041 case COFF::reloc_type: \
1042 Res = #reloc_type; \
1046 COFFObjectFile::getRelocationTypeName(DataRefImpl Rel,
1047 SmallVectorImpl<char> &Result) const {
1048 const coff_relocation *Reloc = toRel(Rel);
1050 switch (getMachine()) {
1051 case COFF::IMAGE_FILE_MACHINE_AMD64:
1052 switch (Reloc->Type) {
1053 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE);
1054 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR64);
1055 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32);
1056 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32NB);
1057 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32);
1058 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_1);
1059 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_2);
1060 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_3);
1061 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_4);
1062 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_5);
1063 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECTION);
1064 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL);
1065 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL7);
1066 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_TOKEN);
1067 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SREL32);
1068 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_PAIR);
1069 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SSPAN32);
1074 case COFF::IMAGE_FILE_MACHINE_ARMNT:
1075 switch (Reloc->Type) {
1076 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ABSOLUTE);
1077 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32);
1078 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32NB);
1079 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24);
1080 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH11);
1081 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_TOKEN);
1082 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX24);
1083 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX11);
1084 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECTION);
1085 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECREL);
1086 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32A);
1087 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32T);
1088 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH20T);
1089 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24T);
1090 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX23T);
1095 case COFF::IMAGE_FILE_MACHINE_I386:
1096 switch (Reloc->Type) {
1097 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_ABSOLUTE);
1098 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR16);
1099 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL16);
1100 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32);
1101 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32NB);
1102 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SEG12);
1103 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECTION);
1104 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL);
1105 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_TOKEN);
1106 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL7);
1107 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL32);
1115 Result.append(Res.begin(), Res.end());
1116 return object_error::success;
1119 #undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME
1122 COFFObjectFile::getRelocationValueString(DataRefImpl Rel,
1123 SmallVectorImpl<char> &Result) const {
1124 const coff_relocation *Reloc = toRel(Rel);
1126 ErrorOr<COFFSymbolRef> Symb = getSymbol(Reloc->SymbolTableIndex);
1127 if (std::error_code EC = Symb.getError())
1129 Sym.p = reinterpret_cast<uintptr_t>(Symb->getRawPtr());
1131 if (std::error_code EC = getSymbolName(Sym, SymName))
1133 Result.append(SymName.begin(), SymName.end());
1134 return object_error::success;
1137 bool COFFObjectFile::isRelocatableObject() const {
1138 return !DataDirectory;
1141 bool ImportDirectoryEntryRef::
1142 operator==(const ImportDirectoryEntryRef &Other) const {
1143 return ImportTable == Other.ImportTable && Index == Other.Index;
1146 void ImportDirectoryEntryRef::moveNext() {
1150 std::error_code ImportDirectoryEntryRef::getImportTableEntry(
1151 const import_directory_table_entry *&Result) const {
1152 Result = ImportTable + Index;
1153 return object_error::success;
1156 static imported_symbol_iterator
1157 makeImportedSymbolIterator(const COFFObjectFile *Object,
1158 uintptr_t Ptr, int Index) {
1159 if (Object->getBytesInAddress() == 4) {
1160 auto *P = reinterpret_cast<const import_lookup_table_entry32 *>(Ptr);
1161 return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object));
1163 auto *P = reinterpret_cast<const import_lookup_table_entry64 *>(Ptr);
1164 return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object));
1167 static imported_symbol_iterator
1168 importedSymbolBegin(uint32_t RVA, const COFFObjectFile *Object) {
1169 uintptr_t IntPtr = 0;
1170 Object->getRvaPtr(RVA, IntPtr);
1171 return makeImportedSymbolIterator(Object, IntPtr, 0);
1174 static imported_symbol_iterator
1175 importedSymbolEnd(uint32_t RVA, const COFFObjectFile *Object) {
1176 uintptr_t IntPtr = 0;
1177 Object->getRvaPtr(RVA, IntPtr);
1178 // Forward the pointer to the last entry which is null.
1180 if (Object->getBytesInAddress() == 4) {
1181 auto *Entry = reinterpret_cast<ulittle32_t *>(IntPtr);
1185 auto *Entry = reinterpret_cast<ulittle64_t *>(IntPtr);
1189 return makeImportedSymbolIterator(Object, IntPtr, Index);
1192 imported_symbol_iterator
1193 ImportDirectoryEntryRef::imported_symbol_begin() const {
1194 return importedSymbolBegin(ImportTable[Index].ImportLookupTableRVA,
1198 imported_symbol_iterator
1199 ImportDirectoryEntryRef::imported_symbol_end() const {
1200 return importedSymbolEnd(ImportTable[Index].ImportLookupTableRVA,
1204 iterator_range<imported_symbol_iterator>
1205 ImportDirectoryEntryRef::imported_symbols() const {
1206 return make_range(imported_symbol_begin(), imported_symbol_end());
1209 std::error_code ImportDirectoryEntryRef::getName(StringRef &Result) const {
1210 uintptr_t IntPtr = 0;
1211 if (std::error_code EC =
1212 OwningObject->getRvaPtr(ImportTable[Index].NameRVA, IntPtr))
1214 Result = StringRef(reinterpret_cast<const char *>(IntPtr));
1215 return object_error::success;
1219 ImportDirectoryEntryRef::getImportLookupTableRVA(uint32_t &Result) const {
1220 Result = ImportTable[Index].ImportLookupTableRVA;
1221 return object_error::success;
1225 ImportDirectoryEntryRef::getImportAddressTableRVA(uint32_t &Result) const {
1226 Result = ImportTable[Index].ImportAddressTableRVA;
1227 return object_error::success;
1230 std::error_code ImportDirectoryEntryRef::getImportLookupEntry(
1231 const import_lookup_table_entry32 *&Result) const {
1232 uintptr_t IntPtr = 0;
1233 uint32_t RVA = ImportTable[Index].ImportLookupTableRVA;
1234 if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
1236 Result = reinterpret_cast<const import_lookup_table_entry32 *>(IntPtr);
1237 return object_error::success;
1240 bool DelayImportDirectoryEntryRef::
1241 operator==(const DelayImportDirectoryEntryRef &Other) const {
1242 return Table == Other.Table && Index == Other.Index;
1245 void DelayImportDirectoryEntryRef::moveNext() {
1249 imported_symbol_iterator
1250 DelayImportDirectoryEntryRef::imported_symbol_begin() const {
1251 return importedSymbolBegin(Table[Index].DelayImportNameTable,
1255 imported_symbol_iterator
1256 DelayImportDirectoryEntryRef::imported_symbol_end() const {
1257 return importedSymbolEnd(Table[Index].DelayImportNameTable,
1261 iterator_range<imported_symbol_iterator>
1262 DelayImportDirectoryEntryRef::imported_symbols() const {
1263 return make_range(imported_symbol_begin(), imported_symbol_end());
1266 std::error_code DelayImportDirectoryEntryRef::getName(StringRef &Result) const {
1267 uintptr_t IntPtr = 0;
1268 if (std::error_code EC = OwningObject->getRvaPtr(Table[Index].Name, IntPtr))
1270 Result = StringRef(reinterpret_cast<const char *>(IntPtr));
1271 return object_error::success;
1274 std::error_code DelayImportDirectoryEntryRef::
1275 getDelayImportTable(const delay_import_directory_table_entry *&Result) const {
1277 return object_error::success;
1280 std::error_code DelayImportDirectoryEntryRef::
1281 getImportAddress(int AddrIndex, uint64_t &Result) const {
1282 uint32_t RVA = Table[Index].DelayImportAddressTable +
1283 AddrIndex * (OwningObject->is64() ? 8 : 4);
1284 uintptr_t IntPtr = 0;
1285 if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
1287 if (OwningObject->is64())
1288 Result = *reinterpret_cast<const ulittle64_t *>(IntPtr);
1290 Result = *reinterpret_cast<const ulittle32_t *>(IntPtr);
1291 return object_error::success;
1294 bool ExportDirectoryEntryRef::
1295 operator==(const ExportDirectoryEntryRef &Other) const {
1296 return ExportTable == Other.ExportTable && Index == Other.Index;
1299 void ExportDirectoryEntryRef::moveNext() {
1303 // Returns the name of the current export symbol. If the symbol is exported only
1304 // by ordinal, the empty string is set as a result.
1305 std::error_code ExportDirectoryEntryRef::getDllName(StringRef &Result) const {
1306 uintptr_t IntPtr = 0;
1307 if (std::error_code EC =
1308 OwningObject->getRvaPtr(ExportTable->NameRVA, IntPtr))
1310 Result = StringRef(reinterpret_cast<const char *>(IntPtr));
1311 return object_error::success;
1314 // Returns the starting ordinal number.
1316 ExportDirectoryEntryRef::getOrdinalBase(uint32_t &Result) const {
1317 Result = ExportTable->OrdinalBase;
1318 return object_error::success;
1321 // Returns the export ordinal of the current export symbol.
1322 std::error_code ExportDirectoryEntryRef::getOrdinal(uint32_t &Result) const {
1323 Result = ExportTable->OrdinalBase + Index;
1324 return object_error::success;
1327 // Returns the address of the current export symbol.
1328 std::error_code ExportDirectoryEntryRef::getExportRVA(uint32_t &Result) const {
1329 uintptr_t IntPtr = 0;
1330 if (std::error_code EC =
1331 OwningObject->getRvaPtr(ExportTable->ExportAddressTableRVA, IntPtr))
1333 const export_address_table_entry *entry =
1334 reinterpret_cast<const export_address_table_entry *>(IntPtr);
1335 Result = entry[Index].ExportRVA;
1336 return object_error::success;
1339 // Returns the name of the current export symbol. If the symbol is exported only
1340 // by ordinal, the empty string is set as a result.
1342 ExportDirectoryEntryRef::getSymbolName(StringRef &Result) const {
1343 uintptr_t IntPtr = 0;
1344 if (std::error_code EC =
1345 OwningObject->getRvaPtr(ExportTable->OrdinalTableRVA, IntPtr))
1347 const ulittle16_t *Start = reinterpret_cast<const ulittle16_t *>(IntPtr);
1349 uint32_t NumEntries = ExportTable->NumberOfNamePointers;
1351 for (const ulittle16_t *I = Start, *E = Start + NumEntries;
1352 I < E; ++I, ++Offset) {
1355 if (std::error_code EC =
1356 OwningObject->getRvaPtr(ExportTable->NamePointerRVA, IntPtr))
1358 const ulittle32_t *NamePtr = reinterpret_cast<const ulittle32_t *>(IntPtr);
1359 if (std::error_code EC = OwningObject->getRvaPtr(NamePtr[Offset], IntPtr))
1361 Result = StringRef(reinterpret_cast<const char *>(IntPtr));
1362 return object_error::success;
1365 return object_error::success;
1368 bool ImportedSymbolRef::
1369 operator==(const ImportedSymbolRef &Other) const {
1370 return Entry32 == Other.Entry32 && Entry64 == Other.Entry64
1371 && Index == Other.Index;
1374 void ImportedSymbolRef::moveNext() {
1379 ImportedSymbolRef::getSymbolName(StringRef &Result) const {
1382 // If a symbol is imported only by ordinal, it has no name.
1383 if (Entry32[Index].isOrdinal())
1384 return object_error::success;
1385 RVA = Entry32[Index].getHintNameRVA();
1387 if (Entry64[Index].isOrdinal())
1388 return object_error::success;
1389 RVA = Entry64[Index].getHintNameRVA();
1391 uintptr_t IntPtr = 0;
1392 if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
1394 // +2 because the first two bytes is hint.
1395 Result = StringRef(reinterpret_cast<const char *>(IntPtr + 2));
1396 return object_error::success;
1399 std::error_code ImportedSymbolRef::getOrdinal(uint16_t &Result) const {
1402 if (Entry32[Index].isOrdinal()) {
1403 Result = Entry32[Index].getOrdinal();
1404 return object_error::success;
1406 RVA = Entry32[Index].getHintNameRVA();
1408 if (Entry64[Index].isOrdinal()) {
1409 Result = Entry64[Index].getOrdinal();
1410 return object_error::success;
1412 RVA = Entry64[Index].getHintNameRVA();
1414 uintptr_t IntPtr = 0;
1415 if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
1417 Result = *reinterpret_cast<const ulittle16_t *>(IntPtr);
1418 return object_error::success;
1421 ErrorOr<std::unique_ptr<COFFObjectFile>>
1422 ObjectFile::createCOFFObjectFile(MemoryBufferRef Object) {
1424 std::unique_ptr<COFFObjectFile> Ret(new COFFObjectFile(Object, EC));
1427 return std::move(Ret);
1430 bool BaseRelocRef::operator==(const BaseRelocRef &Other) const {
1431 return Header == Other.Header && Index == Other.Index;
1434 void BaseRelocRef::moveNext() {
1435 // Header->BlockSize is the size of the current block, including the
1436 // size of the header itself.
1437 uint32_t Size = sizeof(*Header) +
1438 sizeof(coff_base_reloc_block_entry) * (Index + 1);
1439 if (Size == Header->BlockSize) {
1440 // .reloc contains a list of base relocation blocks. Each block
1441 // consists of the header followed by entries. The header contains
1442 // how many entories will follow. When we reach the end of the
1443 // current block, proceed to the next block.
1444 Header = reinterpret_cast<const coff_base_reloc_block_header *>(
1445 reinterpret_cast<const uint8_t *>(Header) + Size);
1452 std::error_code BaseRelocRef::getType(uint8_t &Type) const {
1453 auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1);
1454 Type = Entry[Index].getType();
1455 return object_error::success;
1458 std::error_code BaseRelocRef::getRVA(uint32_t &Result) const {
1459 auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1);
1460 Result = Header->PageRVA + Entry[Index].getOffset();
1461 return object_error::success;