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/ADT/iterator_range.h"
20 #include "llvm/Support/COFF.h"
21 #include "llvm/Support/Debug.h"
22 #include "llvm/Support/raw_ostream.h"
27 using namespace object;
29 using support::ulittle16_t;
30 using support::ulittle32_t;
31 using support::ulittle64_t;
32 using support::little16_t;
34 // Returns false if size is greater than the buffer size. And sets ec.
35 static bool checkSize(MemoryBufferRef M, std::error_code &EC, uint64_t Size) {
36 if (M.getBufferSize() < Size) {
37 EC = object_error::unexpected_eof;
43 static std::error_code checkOffset(MemoryBufferRef M, uintptr_t Addr,
44 const uint64_t Size) {
45 if (Addr + Size < Addr || Addr + Size < Size ||
46 Addr + Size > uintptr_t(M.getBufferEnd()) ||
47 Addr < uintptr_t(M.getBufferStart())) {
48 return object_error::unexpected_eof;
50 return std::error_code();
53 // Sets Obj unless any bytes in [addr, addr + size) fall outsize of m.
54 // Returns unexpected_eof if error.
56 static std::error_code getObject(const T *&Obj, MemoryBufferRef M,
58 const uint64_t Size = sizeof(T)) {
59 uintptr_t Addr = uintptr_t(Ptr);
60 if (std::error_code EC = checkOffset(M, Addr, Size))
62 Obj = reinterpret_cast<const T *>(Addr);
63 return std::error_code();
66 // Decode a string table entry in base 64 (//AAAAAA). Expects \arg Str without
68 static bool decodeBase64StringEntry(StringRef Str, uint32_t &Result) {
69 assert(Str.size() <= 6 && "String too long, possible overflow.");
74 while (!Str.empty()) {
76 if (Str[0] >= 'A' && Str[0] <= 'Z') // 0..25
77 CharVal = Str[0] - 'A';
78 else if (Str[0] >= 'a' && Str[0] <= 'z') // 26..51
79 CharVal = Str[0] - 'a' + 26;
80 else if (Str[0] >= '0' && Str[0] <= '9') // 52..61
81 CharVal = Str[0] - '0' + 52;
82 else if (Str[0] == '+') // 62
84 else if (Str[0] == '/') // 63
89 Value = (Value * 64) + CharVal;
93 if (Value > std::numeric_limits<uint32_t>::max())
96 Result = static_cast<uint32_t>(Value);
100 template <typename coff_symbol_type>
101 const coff_symbol_type *COFFObjectFile::toSymb(DataRefImpl Ref) const {
102 const coff_symbol_type *Addr =
103 reinterpret_cast<const coff_symbol_type *>(Ref.p);
105 assert(!checkOffset(Data, uintptr_t(Addr), sizeof(*Addr)));
107 // Verify that the symbol points to a valid entry in the symbol table.
108 uintptr_t Offset = uintptr_t(Addr) - uintptr_t(base());
110 assert((Offset - getPointerToSymbolTable()) % sizeof(coff_symbol_type) == 0 &&
111 "Symbol did not point to the beginning of a symbol");
117 const coff_section *COFFObjectFile::toSec(DataRefImpl Ref) const {
118 const coff_section *Addr = reinterpret_cast<const coff_section*>(Ref.p);
121 // Verify that the section points to a valid entry in the section table.
122 if (Addr < SectionTable || Addr >= (SectionTable + getNumberOfSections()))
123 report_fatal_error("Section was outside of section table.");
125 uintptr_t Offset = uintptr_t(Addr) - uintptr_t(SectionTable);
126 assert(Offset % sizeof(coff_section) == 0 &&
127 "Section did not point to the beginning of a section");
133 void COFFObjectFile::moveSymbolNext(DataRefImpl &Ref) const {
134 auto End = reinterpret_cast<uintptr_t>(StringTable);
136 const coff_symbol16 *Symb = toSymb<coff_symbol16>(Ref);
137 Symb += 1 + Symb->NumberOfAuxSymbols;
138 Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End);
139 } else if (SymbolTable32) {
140 const coff_symbol32 *Symb = toSymb<coff_symbol32>(Ref);
141 Symb += 1 + Symb->NumberOfAuxSymbols;
142 Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End);
144 llvm_unreachable("no symbol table pointer!");
148 ErrorOr<StringRef> COFFObjectFile::getSymbolName(DataRefImpl Ref) const {
149 COFFSymbolRef Symb = getCOFFSymbol(Ref);
151 std::error_code EC = getSymbolName(Symb, Result);
157 uint64_t COFFObjectFile::getSymbolValueImpl(DataRefImpl Ref) const {
158 return getCOFFSymbol(Ref).getValue();
161 ErrorOr<uint64_t> COFFObjectFile::getSymbolAddress(DataRefImpl Ref) const {
162 uint64_t Result = getSymbolValue(Ref);
163 COFFSymbolRef Symb = getCOFFSymbol(Ref);
164 int32_t SectionNumber = Symb.getSectionNumber();
166 if (Symb.isAnyUndefined() || Symb.isCommon() ||
167 COFF::isReservedSectionNumber(SectionNumber))
170 const coff_section *Section = nullptr;
171 if (std::error_code EC = getSection(SectionNumber, Section))
173 Result += Section->VirtualAddress;
175 // The section VirtualAddress does not include ImageBase, and we want to
176 // return virtual addresses.
178 Result += PE32Header->ImageBase;
179 else if (PE32PlusHeader)
180 Result += PE32Header->ImageBase;
185 SymbolRef::Type COFFObjectFile::getSymbolType(DataRefImpl Ref) const {
186 COFFSymbolRef Symb = getCOFFSymbol(Ref);
187 int32_t SectionNumber = Symb.getSectionNumber();
189 if (Symb.isAnyUndefined())
190 return SymbolRef::ST_Unknown;
191 if (Symb.isFunctionDefinition())
192 return SymbolRef::ST_Function;
194 return SymbolRef::ST_Data;
195 if (Symb.isFileRecord())
196 return SymbolRef::ST_File;
198 // TODO: perhaps we need a new symbol type ST_Section.
199 if (SectionNumber == COFF::IMAGE_SYM_DEBUG || Symb.isSectionDefinition())
200 return SymbolRef::ST_Debug;
202 if (!COFF::isReservedSectionNumber(SectionNumber))
203 return SymbolRef::ST_Data;
205 return SymbolRef::ST_Other;
208 uint32_t COFFObjectFile::getSymbolFlags(DataRefImpl Ref) const {
209 COFFSymbolRef Symb = getCOFFSymbol(Ref);
210 uint32_t Result = SymbolRef::SF_None;
212 if (Symb.isExternal() || Symb.isWeakExternal())
213 Result |= SymbolRef::SF_Global;
215 if (Symb.isWeakExternal())
216 Result |= SymbolRef::SF_Weak;
218 if (Symb.getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE)
219 Result |= SymbolRef::SF_Absolute;
221 if (Symb.isFileRecord())
222 Result |= SymbolRef::SF_FormatSpecific;
224 if (Symb.isSectionDefinition())
225 Result |= SymbolRef::SF_FormatSpecific;
228 Result |= SymbolRef::SF_Common;
230 if (Symb.isAnyUndefined())
231 Result |= SymbolRef::SF_Undefined;
236 uint64_t COFFObjectFile::getCommonSymbolSizeImpl(DataRefImpl Ref) const {
237 COFFSymbolRef Symb = getCOFFSymbol(Ref);
238 return Symb.getValue();
242 COFFObjectFile::getSymbolSection(DataRefImpl Ref,
243 section_iterator &Result) const {
244 COFFSymbolRef Symb = getCOFFSymbol(Ref);
245 if (COFF::isReservedSectionNumber(Symb.getSectionNumber())) {
246 Result = section_end();
248 const coff_section *Sec = nullptr;
249 if (std::error_code EC = getSection(Symb.getSectionNumber(), Sec))
252 Ref.p = reinterpret_cast<uintptr_t>(Sec);
253 Result = section_iterator(SectionRef(Ref, this));
255 return std::error_code();
258 unsigned COFFObjectFile::getSymbolSectionID(SymbolRef Sym) const {
259 COFFSymbolRef Symb = getCOFFSymbol(Sym.getRawDataRefImpl());
260 return Symb.getSectionNumber();
263 void COFFObjectFile::moveSectionNext(DataRefImpl &Ref) const {
264 const coff_section *Sec = toSec(Ref);
266 Ref.p = reinterpret_cast<uintptr_t>(Sec);
269 std::error_code COFFObjectFile::getSectionName(DataRefImpl Ref,
270 StringRef &Result) const {
271 const coff_section *Sec = toSec(Ref);
272 return getSectionName(Sec, Result);
275 uint64_t COFFObjectFile::getSectionAddress(DataRefImpl Ref) const {
276 const coff_section *Sec = toSec(Ref);
277 return Sec->VirtualAddress;
280 uint64_t COFFObjectFile::getSectionSize(DataRefImpl Ref) const {
281 return getSectionSize(toSec(Ref));
284 std::error_code COFFObjectFile::getSectionContents(DataRefImpl Ref,
285 StringRef &Result) const {
286 const coff_section *Sec = toSec(Ref);
287 ArrayRef<uint8_t> Res;
288 std::error_code EC = getSectionContents(Sec, Res);
289 Result = StringRef(reinterpret_cast<const char*>(Res.data()), Res.size());
293 uint64_t COFFObjectFile::getSectionAlignment(DataRefImpl Ref) const {
294 const coff_section *Sec = toSec(Ref);
295 return uint64_t(1) << (((Sec->Characteristics & 0x00F00000) >> 20) - 1);
298 bool COFFObjectFile::isSectionText(DataRefImpl Ref) const {
299 const coff_section *Sec = toSec(Ref);
300 return Sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
303 bool COFFObjectFile::isSectionData(DataRefImpl Ref) const {
304 const coff_section *Sec = toSec(Ref);
305 return Sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
308 bool COFFObjectFile::isSectionBSS(DataRefImpl Ref) const {
309 const coff_section *Sec = toSec(Ref);
310 const uint32_t BssFlags = COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
311 COFF::IMAGE_SCN_MEM_READ |
312 COFF::IMAGE_SCN_MEM_WRITE;
313 return (Sec->Characteristics & BssFlags) == BssFlags;
316 unsigned COFFObjectFile::getSectionID(SectionRef Sec) const {
318 uintptr_t(Sec.getRawDataRefImpl().p) - uintptr_t(SectionTable);
319 assert((Offset % sizeof(coff_section)) == 0);
320 return (Offset / sizeof(coff_section)) + 1;
323 bool COFFObjectFile::isSectionVirtual(DataRefImpl Ref) const {
324 const coff_section *Sec = toSec(Ref);
325 // In COFF, a virtual section won't have any in-file
326 // content, so the file pointer to the content will be zero.
327 return Sec->PointerToRawData == 0;
330 static uint32_t getNumberOfRelocations(const coff_section *Sec,
331 MemoryBufferRef M, const uint8_t *base) {
332 // The field for the number of relocations in COFF section table is only
333 // 16-bit wide. If a section has more than 65535 relocations, 0xFFFF is set to
334 // NumberOfRelocations field, and the actual relocation count is stored in the
335 // VirtualAddress field in the first relocation entry.
336 if (Sec->hasExtendedRelocations()) {
337 const coff_relocation *FirstReloc;
338 if (getObject(FirstReloc, M, reinterpret_cast<const coff_relocation*>(
339 base + Sec->PointerToRelocations)))
341 // -1 to exclude this first relocation entry.
342 return FirstReloc->VirtualAddress - 1;
344 return Sec->NumberOfRelocations;
347 static const coff_relocation *
348 getFirstReloc(const coff_section *Sec, MemoryBufferRef M, const uint8_t *Base) {
349 uint64_t NumRelocs = getNumberOfRelocations(Sec, M, Base);
352 auto begin = reinterpret_cast<const coff_relocation *>(
353 Base + Sec->PointerToRelocations);
354 if (Sec->hasExtendedRelocations()) {
355 // Skip the first relocation entry repurposed to store the number of
359 if (checkOffset(M, uintptr_t(begin), sizeof(coff_relocation) * NumRelocs))
364 relocation_iterator COFFObjectFile::section_rel_begin(DataRefImpl Ref) const {
365 const coff_section *Sec = toSec(Ref);
366 const coff_relocation *begin = getFirstReloc(Sec, Data, base());
367 if (begin && Sec->VirtualAddress != 0)
368 report_fatal_error("Sections with relocations should have an address of 0");
370 Ret.p = reinterpret_cast<uintptr_t>(begin);
371 return relocation_iterator(RelocationRef(Ret, this));
374 relocation_iterator COFFObjectFile::section_rel_end(DataRefImpl Ref) const {
375 const coff_section *Sec = toSec(Ref);
376 const coff_relocation *I = getFirstReloc(Sec, Data, base());
378 I += getNumberOfRelocations(Sec, Data, base());
380 Ret.p = reinterpret_cast<uintptr_t>(I);
381 return relocation_iterator(RelocationRef(Ret, this));
384 // Initialize the pointer to the symbol table.
385 std::error_code COFFObjectFile::initSymbolTablePtr() {
387 if (std::error_code EC = getObject(
388 SymbolTable16, Data, base() + getPointerToSymbolTable(),
389 (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
392 if (COFFBigObjHeader)
393 if (std::error_code EC = getObject(
394 SymbolTable32, Data, base() + getPointerToSymbolTable(),
395 (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
398 // Find string table. The first four byte of the string table contains the
399 // total size of the string table, including the size field itself. If the
400 // string table is empty, the value of the first four byte would be 4.
401 uint32_t StringTableOffset = getPointerToSymbolTable() +
402 getNumberOfSymbols() * getSymbolTableEntrySize();
403 const uint8_t *StringTableAddr = base() + StringTableOffset;
404 const ulittle32_t *StringTableSizePtr;
405 if (std::error_code EC = getObject(StringTableSizePtr, Data, StringTableAddr))
407 StringTableSize = *StringTableSizePtr;
408 if (std::error_code EC =
409 getObject(StringTable, Data, StringTableAddr, StringTableSize))
412 // Treat table sizes < 4 as empty because contrary to the PECOFF spec, some
413 // tools like cvtres write a size of 0 for an empty table instead of 4.
414 if (StringTableSize < 4)
417 // Check that the string table is null terminated if has any in it.
418 if (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)
419 return object_error::parse_failed;
420 return std::error_code();
423 // Returns the file offset for the given VA.
424 std::error_code COFFObjectFile::getVaPtr(uint64_t Addr, uintptr_t &Res) const {
425 uint64_t ImageBase = PE32Header ? (uint64_t)PE32Header->ImageBase
426 : (uint64_t)PE32PlusHeader->ImageBase;
427 uint64_t Rva = Addr - ImageBase;
428 assert(Rva <= UINT32_MAX);
429 return getRvaPtr((uint32_t)Rva, Res);
432 // Returns the file offset for the given RVA.
433 std::error_code COFFObjectFile::getRvaPtr(uint32_t Addr, uintptr_t &Res) const {
434 for (const SectionRef &S : sections()) {
435 const coff_section *Section = getCOFFSection(S);
436 uint32_t SectionStart = Section->VirtualAddress;
437 uint32_t SectionEnd = Section->VirtualAddress + Section->VirtualSize;
438 if (SectionStart <= Addr && Addr < SectionEnd) {
439 uint32_t Offset = Addr - SectionStart;
440 Res = uintptr_t(base()) + Section->PointerToRawData + Offset;
441 return std::error_code();
444 return object_error::parse_failed;
447 // Returns hint and name fields, assuming \p Rva is pointing to a Hint/Name
449 std::error_code COFFObjectFile::getHintName(uint32_t Rva, uint16_t &Hint,
450 StringRef &Name) const {
451 uintptr_t IntPtr = 0;
452 if (std::error_code EC = getRvaPtr(Rva, IntPtr))
454 const uint8_t *Ptr = reinterpret_cast<const uint8_t *>(IntPtr);
455 Hint = *reinterpret_cast<const ulittle16_t *>(Ptr);
456 Name = StringRef(reinterpret_cast<const char *>(Ptr + 2));
457 return std::error_code();
460 // Find the import table.
461 std::error_code COFFObjectFile::initImportTablePtr() {
462 // First, we get the RVA of the import table. If the file lacks a pointer to
463 // the import table, do nothing.
464 const data_directory *DataEntry;
465 if (getDataDirectory(COFF::IMPORT_TABLE, DataEntry))
466 return std::error_code();
468 // Do nothing if the pointer to import table is NULL.
469 if (DataEntry->RelativeVirtualAddress == 0)
470 return std::error_code();
472 uint32_t ImportTableRva = DataEntry->RelativeVirtualAddress;
473 // -1 because the last entry is the null entry.
474 NumberOfImportDirectory = DataEntry->Size /
475 sizeof(import_directory_table_entry) - 1;
477 // Find the section that contains the RVA. This is needed because the RVA is
478 // the import table's memory address which is different from its file offset.
479 uintptr_t IntPtr = 0;
480 if (std::error_code EC = getRvaPtr(ImportTableRva, IntPtr))
482 ImportDirectory = reinterpret_cast<
483 const import_directory_table_entry *>(IntPtr);
484 return std::error_code();
487 // Initializes DelayImportDirectory and NumberOfDelayImportDirectory.
488 std::error_code COFFObjectFile::initDelayImportTablePtr() {
489 const data_directory *DataEntry;
490 if (getDataDirectory(COFF::DELAY_IMPORT_DESCRIPTOR, DataEntry))
491 return std::error_code();
492 if (DataEntry->RelativeVirtualAddress == 0)
493 return std::error_code();
495 uint32_t RVA = DataEntry->RelativeVirtualAddress;
496 NumberOfDelayImportDirectory = DataEntry->Size /
497 sizeof(delay_import_directory_table_entry) - 1;
499 uintptr_t IntPtr = 0;
500 if (std::error_code EC = getRvaPtr(RVA, IntPtr))
502 DelayImportDirectory = reinterpret_cast<
503 const delay_import_directory_table_entry *>(IntPtr);
504 return std::error_code();
507 // Find the export table.
508 std::error_code COFFObjectFile::initExportTablePtr() {
509 // First, we get the RVA of the export table. If the file lacks a pointer to
510 // the export table, do nothing.
511 const data_directory *DataEntry;
512 if (getDataDirectory(COFF::EXPORT_TABLE, DataEntry))
513 return std::error_code();
515 // Do nothing if the pointer to export table is NULL.
516 if (DataEntry->RelativeVirtualAddress == 0)
517 return std::error_code();
519 uint32_t ExportTableRva = DataEntry->RelativeVirtualAddress;
520 uintptr_t IntPtr = 0;
521 if (std::error_code EC = getRvaPtr(ExportTableRva, IntPtr))
524 reinterpret_cast<const export_directory_table_entry *>(IntPtr);
525 return std::error_code();
528 std::error_code COFFObjectFile::initBaseRelocPtr() {
529 const data_directory *DataEntry;
530 if (getDataDirectory(COFF::BASE_RELOCATION_TABLE, DataEntry))
531 return std::error_code();
532 if (DataEntry->RelativeVirtualAddress == 0)
533 return std::error_code();
535 uintptr_t IntPtr = 0;
536 if (std::error_code EC = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr))
538 BaseRelocHeader = reinterpret_cast<const coff_base_reloc_block_header *>(
540 BaseRelocEnd = reinterpret_cast<coff_base_reloc_block_header *>(
541 IntPtr + DataEntry->Size);
542 return std::error_code();
545 COFFObjectFile::COFFObjectFile(MemoryBufferRef Object, std::error_code &EC)
546 : ObjectFile(Binary::ID_COFF, Object), COFFHeader(nullptr),
547 COFFBigObjHeader(nullptr), PE32Header(nullptr), PE32PlusHeader(nullptr),
548 DataDirectory(nullptr), SectionTable(nullptr), SymbolTable16(nullptr),
549 SymbolTable32(nullptr), StringTable(nullptr), StringTableSize(0),
550 ImportDirectory(nullptr), NumberOfImportDirectory(0),
551 DelayImportDirectory(nullptr), NumberOfDelayImportDirectory(0),
552 ExportDirectory(nullptr), BaseRelocHeader(nullptr),
553 BaseRelocEnd(nullptr) {
554 // Check that we at least have enough room for a header.
555 if (!checkSize(Data, EC, sizeof(coff_file_header)))
558 // The current location in the file where we are looking at.
561 // PE header is optional and is present only in executables. If it exists,
562 // it is placed right after COFF header.
563 bool HasPEHeader = false;
565 // Check if this is a PE/COFF file.
566 if (checkSize(Data, EC, sizeof(dos_header) + sizeof(COFF::PEMagic))) {
567 // PE/COFF, seek through MS-DOS compatibility stub and 4-byte
568 // PE signature to find 'normal' COFF header.
569 const auto *DH = reinterpret_cast<const dos_header *>(base());
570 if (DH->Magic[0] == 'M' && DH->Magic[1] == 'Z') {
571 CurPtr = DH->AddressOfNewExeHeader;
572 // Check the PE magic bytes. ("PE\0\0")
573 if (memcmp(base() + CurPtr, COFF::PEMagic, sizeof(COFF::PEMagic)) != 0) {
574 EC = object_error::parse_failed;
577 CurPtr += sizeof(COFF::PEMagic); // Skip the PE magic bytes.
582 if ((EC = getObject(COFFHeader, Data, base() + CurPtr)))
585 // It might be a bigobj file, let's check. Note that COFF bigobj and COFF
586 // import libraries share a common prefix but bigobj is more restrictive.
587 if (!HasPEHeader && COFFHeader->Machine == COFF::IMAGE_FILE_MACHINE_UNKNOWN &&
588 COFFHeader->NumberOfSections == uint16_t(0xffff) &&
589 checkSize(Data, EC, sizeof(coff_bigobj_file_header))) {
590 if ((EC = getObject(COFFBigObjHeader, Data, base() + CurPtr)))
593 // Verify that we are dealing with bigobj.
594 if (COFFBigObjHeader->Version >= COFF::BigObjHeader::MinBigObjectVersion &&
595 std::memcmp(COFFBigObjHeader->UUID, COFF::BigObjMagic,
596 sizeof(COFF::BigObjMagic)) == 0) {
597 COFFHeader = nullptr;
598 CurPtr += sizeof(coff_bigobj_file_header);
600 // It's not a bigobj.
601 COFFBigObjHeader = nullptr;
605 // The prior checkSize call may have failed. This isn't a hard error
606 // because we were just trying to sniff out bigobj.
607 EC = std::error_code();
608 CurPtr += sizeof(coff_file_header);
610 if (COFFHeader->isImportLibrary())
615 const pe32_header *Header;
616 if ((EC = getObject(Header, Data, base() + CurPtr)))
619 const uint8_t *DataDirAddr;
620 uint64_t DataDirSize;
621 if (Header->Magic == COFF::PE32Header::PE32) {
623 DataDirAddr = base() + CurPtr + sizeof(pe32_header);
624 DataDirSize = sizeof(data_directory) * PE32Header->NumberOfRvaAndSize;
625 } else if (Header->Magic == COFF::PE32Header::PE32_PLUS) {
626 PE32PlusHeader = reinterpret_cast<const pe32plus_header *>(Header);
627 DataDirAddr = base() + CurPtr + sizeof(pe32plus_header);
628 DataDirSize = sizeof(data_directory) * PE32PlusHeader->NumberOfRvaAndSize;
630 // It's neither PE32 nor PE32+.
631 EC = object_error::parse_failed;
634 if ((EC = getObject(DataDirectory, Data, DataDirAddr, DataDirSize)))
636 CurPtr += COFFHeader->SizeOfOptionalHeader;
639 if ((EC = getObject(SectionTable, Data, base() + CurPtr,
640 (uint64_t)getNumberOfSections() * sizeof(coff_section))))
643 // Initialize the pointer to the symbol table.
644 if (getPointerToSymbolTable() != 0) {
645 if ((EC = initSymbolTablePtr()))
648 // We had better not have any symbols if we don't have a symbol table.
649 if (getNumberOfSymbols() != 0) {
650 EC = object_error::parse_failed;
655 // Initialize the pointer to the beginning of the import table.
656 if ((EC = initImportTablePtr()))
658 if ((EC = initDelayImportTablePtr()))
661 // Initialize the pointer to the export table.
662 if ((EC = initExportTablePtr()))
665 // Initialize the pointer to the base relocation table.
666 if ((EC = initBaseRelocPtr()))
669 EC = std::error_code();
672 basic_symbol_iterator COFFObjectFile::symbol_begin_impl() const {
674 Ret.p = getSymbolTable();
675 return basic_symbol_iterator(SymbolRef(Ret, this));
678 basic_symbol_iterator COFFObjectFile::symbol_end_impl() const {
679 // The symbol table ends where the string table begins.
681 Ret.p = reinterpret_cast<uintptr_t>(StringTable);
682 return basic_symbol_iterator(SymbolRef(Ret, this));
685 import_directory_iterator COFFObjectFile::import_directory_begin() const {
686 return import_directory_iterator(
687 ImportDirectoryEntryRef(ImportDirectory, 0, this));
690 import_directory_iterator COFFObjectFile::import_directory_end() const {
691 return import_directory_iterator(
692 ImportDirectoryEntryRef(ImportDirectory, NumberOfImportDirectory, this));
695 delay_import_directory_iterator
696 COFFObjectFile::delay_import_directory_begin() const {
697 return delay_import_directory_iterator(
698 DelayImportDirectoryEntryRef(DelayImportDirectory, 0, this));
701 delay_import_directory_iterator
702 COFFObjectFile::delay_import_directory_end() const {
703 return delay_import_directory_iterator(
704 DelayImportDirectoryEntryRef(
705 DelayImportDirectory, NumberOfDelayImportDirectory, this));
708 export_directory_iterator COFFObjectFile::export_directory_begin() const {
709 return export_directory_iterator(
710 ExportDirectoryEntryRef(ExportDirectory, 0, this));
713 export_directory_iterator COFFObjectFile::export_directory_end() const {
714 if (!ExportDirectory)
715 return export_directory_iterator(ExportDirectoryEntryRef(nullptr, 0, this));
716 ExportDirectoryEntryRef Ref(ExportDirectory,
717 ExportDirectory->AddressTableEntries, this);
718 return export_directory_iterator(Ref);
721 section_iterator COFFObjectFile::section_begin() const {
723 Ret.p = reinterpret_cast<uintptr_t>(SectionTable);
724 return section_iterator(SectionRef(Ret, this));
727 section_iterator COFFObjectFile::section_end() const {
730 COFFHeader && COFFHeader->isImportLibrary() ? 0 : getNumberOfSections();
731 Ret.p = reinterpret_cast<uintptr_t>(SectionTable + NumSections);
732 return section_iterator(SectionRef(Ret, this));
735 base_reloc_iterator COFFObjectFile::base_reloc_begin() const {
736 return base_reloc_iterator(BaseRelocRef(BaseRelocHeader, this));
739 base_reloc_iterator COFFObjectFile::base_reloc_end() const {
740 return base_reloc_iterator(BaseRelocRef(BaseRelocEnd, this));
743 uint8_t COFFObjectFile::getBytesInAddress() const {
744 return getArch() == Triple::x86_64 ? 8 : 4;
747 StringRef COFFObjectFile::getFileFormatName() const {
748 switch(getMachine()) {
749 case COFF::IMAGE_FILE_MACHINE_I386:
751 case COFF::IMAGE_FILE_MACHINE_AMD64:
752 return "COFF-x86-64";
753 case COFF::IMAGE_FILE_MACHINE_ARMNT:
755 case COFF::IMAGE_FILE_MACHINE_ARM64:
758 return "COFF-<unknown arch>";
762 unsigned COFFObjectFile::getArch() const {
763 switch (getMachine()) {
764 case COFF::IMAGE_FILE_MACHINE_I386:
766 case COFF::IMAGE_FILE_MACHINE_AMD64:
767 return Triple::x86_64;
768 case COFF::IMAGE_FILE_MACHINE_ARMNT:
769 return Triple::thumb;
770 case COFF::IMAGE_FILE_MACHINE_ARM64:
771 return Triple::aarch64;
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 std::error_code();
803 COFFObjectFile::getPE32PlusHeader(const pe32plus_header *&Res) const {
804 Res = PE32PlusHeader;
805 return std::error_code();
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 std::error_code();
827 std::error_code COFFObjectFile::getSection(int32_t Index,
828 const coff_section *&Result) const {
830 if (COFF::isReservedSectionNumber(Index))
831 return std::error_code();
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 std::error_code();
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 std::error_code();
851 std::error_code COFFObjectFile::getSymbolName(COFFSymbolRef Symbol,
852 StringRef &Res) const {
853 return getSymbolName(Symbol.getGeneric(), Res);
856 std::error_code COFFObjectFile::getSymbolName(const coff_symbol_generic *Symbol,
857 StringRef &Res) const {
858 // Check for string table entry. First 4 bytes are 0.
859 if (Symbol->Name.Offset.Zeroes == 0) {
860 if (std::error_code EC = getString(Symbol->Name.Offset.Offset, Res))
862 return std::error_code();
865 if (Symbol->Name.ShortName[COFF::NameSize - 1] == 0)
866 // Null terminated, let ::strlen figure out the length.
867 Res = StringRef(Symbol->Name.ShortName);
869 // Not null terminated, use all 8 bytes.
870 Res = StringRef(Symbol->Name.ShortName, COFF::NameSize);
871 return std::error_code();
875 COFFObjectFile::getSymbolAuxData(COFFSymbolRef Symbol) const {
876 const uint8_t *Aux = nullptr;
878 size_t SymbolSize = getSymbolTableEntrySize();
879 if (Symbol.getNumberOfAuxSymbols() > 0) {
880 // AUX data comes immediately after the symbol in COFF
881 Aux = reinterpret_cast<const uint8_t *>(Symbol.getRawPtr()) + SymbolSize;
883 // Verify that the Aux symbol points to a valid entry in the symbol table.
884 uintptr_t Offset = uintptr_t(Aux) - uintptr_t(base());
885 if (Offset < getPointerToSymbolTable() ||
887 getPointerToSymbolTable() + (getNumberOfSymbols() * SymbolSize))
888 report_fatal_error("Aux Symbol data was outside of symbol table.");
890 assert((Offset - getPointerToSymbolTable()) % SymbolSize == 0 &&
891 "Aux Symbol data did not point to the beginning of a symbol");
894 return makeArrayRef(Aux, Symbol.getNumberOfAuxSymbols() * SymbolSize);
897 std::error_code COFFObjectFile::getSectionName(const coff_section *Sec,
898 StringRef &Res) const {
900 if (Sec->Name[COFF::NameSize - 1] == 0)
901 // Null terminated, let ::strlen figure out the length.
904 // Not null terminated, use all 8 bytes.
905 Name = StringRef(Sec->Name, COFF::NameSize);
907 // Check for string table entry. First byte is '/'.
908 if (Name.startswith("/")) {
910 if (Name.startswith("//")) {
911 if (decodeBase64StringEntry(Name.substr(2), Offset))
912 return object_error::parse_failed;
914 if (Name.substr(1).getAsInteger(10, Offset))
915 return object_error::parse_failed;
917 if (std::error_code EC = getString(Offset, Name))
922 return std::error_code();
925 uint64_t COFFObjectFile::getSectionSize(const coff_section *Sec) const {
926 // SizeOfRawData and VirtualSize change what they represent depending on
927 // whether or not we have an executable image.
929 // For object files, SizeOfRawData contains the size of section's data;
930 // VirtualSize should be zero but isn't due to buggy COFF writers.
932 // For executables, SizeOfRawData *must* be a multiple of FileAlignment; the
933 // actual section size is in VirtualSize. It is possible for VirtualSize to
934 // be greater than SizeOfRawData; the contents past that point should be
935 // considered to be zero.
937 return std::min(Sec->VirtualSize, Sec->SizeOfRawData);
938 return 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 std::error_code();
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 uint64_t COFFObjectFile::getRelocationOffset(DataRefImpl Rel) const {
969 const coff_relocation *R = toRel(Rel);
970 return R->VirtualAddress;
973 symbol_iterator COFFObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
974 const coff_relocation *R = toRel(Rel);
976 if (R->SymbolTableIndex >= getNumberOfSymbols())
979 Ref.p = reinterpret_cast<uintptr_t>(SymbolTable16 + R->SymbolTableIndex);
980 else if (SymbolTable32)
981 Ref.p = reinterpret_cast<uintptr_t>(SymbolTable32 + R->SymbolTableIndex);
983 llvm_unreachable("no symbol table pointer!");
984 return symbol_iterator(SymbolRef(Ref, this));
987 uint64_t COFFObjectFile::getRelocationType(DataRefImpl Rel) const {
988 const coff_relocation* R = toRel(Rel);
993 COFFObjectFile::getCOFFSection(const SectionRef &Section) const {
994 return toSec(Section.getRawDataRefImpl());
997 COFFSymbolRef COFFObjectFile::getCOFFSymbol(const DataRefImpl &Ref) const {
999 return toSymb<coff_symbol16>(Ref);
1001 return toSymb<coff_symbol32>(Ref);
1002 llvm_unreachable("no symbol table pointer!");
1005 COFFSymbolRef COFFObjectFile::getCOFFSymbol(const SymbolRef &Symbol) const {
1006 return getCOFFSymbol(Symbol.getRawDataRefImpl());
1009 const coff_relocation *
1010 COFFObjectFile::getCOFFRelocation(const RelocationRef &Reloc) const {
1011 return toRel(Reloc.getRawDataRefImpl());
1014 iterator_range<const coff_relocation *>
1015 COFFObjectFile::getRelocations(const coff_section *Sec) const {
1016 const coff_relocation *I = getFirstReloc(Sec, Data, base());
1017 const coff_relocation *E = I;
1019 E += getNumberOfRelocations(Sec, Data, base());
1020 return make_range(I, E);
1023 #define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(reloc_type) \
1024 case COFF::reloc_type: \
1025 Res = #reloc_type; \
1028 void COFFObjectFile::getRelocationTypeName(
1029 DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
1030 const coff_relocation *Reloc = toRel(Rel);
1032 switch (getMachine()) {
1033 case COFF::IMAGE_FILE_MACHINE_AMD64:
1034 switch (Reloc->Type) {
1035 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE);
1036 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR64);
1037 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32);
1038 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32NB);
1039 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32);
1040 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_1);
1041 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_2);
1042 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_3);
1043 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_4);
1044 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_5);
1045 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECTION);
1046 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL);
1047 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL7);
1048 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_TOKEN);
1049 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SREL32);
1050 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_PAIR);
1051 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SSPAN32);
1056 case COFF::IMAGE_FILE_MACHINE_ARMNT:
1057 switch (Reloc->Type) {
1058 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ABSOLUTE);
1059 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32);
1060 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32NB);
1061 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24);
1062 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH11);
1063 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_TOKEN);
1064 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX24);
1065 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX11);
1066 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECTION);
1067 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECREL);
1068 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32A);
1069 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32T);
1070 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH20T);
1071 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24T);
1072 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX23T);
1077 case COFF::IMAGE_FILE_MACHINE_I386:
1078 switch (Reloc->Type) {
1079 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_ABSOLUTE);
1080 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR16);
1081 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL16);
1082 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32);
1083 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32NB);
1084 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SEG12);
1085 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECTION);
1086 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL);
1087 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_TOKEN);
1088 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL7);
1089 LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL32);
1097 Result.append(Res.begin(), Res.end());
1100 #undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME
1102 bool COFFObjectFile::isRelocatableObject() const {
1103 return !DataDirectory;
1106 bool ImportDirectoryEntryRef::
1107 operator==(const ImportDirectoryEntryRef &Other) const {
1108 return ImportTable == Other.ImportTable && Index == Other.Index;
1111 void ImportDirectoryEntryRef::moveNext() {
1115 std::error_code ImportDirectoryEntryRef::getImportTableEntry(
1116 const import_directory_table_entry *&Result) const {
1117 Result = ImportTable + Index;
1118 return std::error_code();
1121 static imported_symbol_iterator
1122 makeImportedSymbolIterator(const COFFObjectFile *Object,
1123 uintptr_t Ptr, int Index) {
1124 if (Object->getBytesInAddress() == 4) {
1125 auto *P = reinterpret_cast<const import_lookup_table_entry32 *>(Ptr);
1126 return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object));
1128 auto *P = reinterpret_cast<const import_lookup_table_entry64 *>(Ptr);
1129 return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object));
1132 static imported_symbol_iterator
1133 importedSymbolBegin(uint32_t RVA, const COFFObjectFile *Object) {
1134 uintptr_t IntPtr = 0;
1135 Object->getRvaPtr(RVA, IntPtr);
1136 return makeImportedSymbolIterator(Object, IntPtr, 0);
1139 static imported_symbol_iterator
1140 importedSymbolEnd(uint32_t RVA, const COFFObjectFile *Object) {
1141 uintptr_t IntPtr = 0;
1142 Object->getRvaPtr(RVA, IntPtr);
1143 // Forward the pointer to the last entry which is null.
1145 if (Object->getBytesInAddress() == 4) {
1146 auto *Entry = reinterpret_cast<ulittle32_t *>(IntPtr);
1150 auto *Entry = reinterpret_cast<ulittle64_t *>(IntPtr);
1154 return makeImportedSymbolIterator(Object, IntPtr, Index);
1157 imported_symbol_iterator
1158 ImportDirectoryEntryRef::imported_symbol_begin() const {
1159 return importedSymbolBegin(ImportTable[Index].ImportLookupTableRVA,
1163 imported_symbol_iterator
1164 ImportDirectoryEntryRef::imported_symbol_end() const {
1165 return importedSymbolEnd(ImportTable[Index].ImportLookupTableRVA,
1169 iterator_range<imported_symbol_iterator>
1170 ImportDirectoryEntryRef::imported_symbols() const {
1171 return make_range(imported_symbol_begin(), imported_symbol_end());
1174 std::error_code ImportDirectoryEntryRef::getName(StringRef &Result) const {
1175 uintptr_t IntPtr = 0;
1176 if (std::error_code EC =
1177 OwningObject->getRvaPtr(ImportTable[Index].NameRVA, IntPtr))
1179 Result = StringRef(reinterpret_cast<const char *>(IntPtr));
1180 return std::error_code();
1184 ImportDirectoryEntryRef::getImportLookupTableRVA(uint32_t &Result) const {
1185 Result = ImportTable[Index].ImportLookupTableRVA;
1186 return std::error_code();
1190 ImportDirectoryEntryRef::getImportAddressTableRVA(uint32_t &Result) const {
1191 Result = ImportTable[Index].ImportAddressTableRVA;
1192 return std::error_code();
1195 std::error_code ImportDirectoryEntryRef::getImportLookupEntry(
1196 const import_lookup_table_entry32 *&Result) const {
1197 uintptr_t IntPtr = 0;
1198 uint32_t RVA = ImportTable[Index].ImportLookupTableRVA;
1199 if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
1201 Result = reinterpret_cast<const import_lookup_table_entry32 *>(IntPtr);
1202 return std::error_code();
1205 bool DelayImportDirectoryEntryRef::
1206 operator==(const DelayImportDirectoryEntryRef &Other) const {
1207 return Table == Other.Table && Index == Other.Index;
1210 void DelayImportDirectoryEntryRef::moveNext() {
1214 imported_symbol_iterator
1215 DelayImportDirectoryEntryRef::imported_symbol_begin() const {
1216 return importedSymbolBegin(Table[Index].DelayImportNameTable,
1220 imported_symbol_iterator
1221 DelayImportDirectoryEntryRef::imported_symbol_end() const {
1222 return importedSymbolEnd(Table[Index].DelayImportNameTable,
1226 iterator_range<imported_symbol_iterator>
1227 DelayImportDirectoryEntryRef::imported_symbols() const {
1228 return make_range(imported_symbol_begin(), imported_symbol_end());
1231 std::error_code DelayImportDirectoryEntryRef::getName(StringRef &Result) const {
1232 uintptr_t IntPtr = 0;
1233 if (std::error_code EC = OwningObject->getRvaPtr(Table[Index].Name, IntPtr))
1235 Result = StringRef(reinterpret_cast<const char *>(IntPtr));
1236 return std::error_code();
1239 std::error_code DelayImportDirectoryEntryRef::
1240 getDelayImportTable(const delay_import_directory_table_entry *&Result) const {
1242 return std::error_code();
1245 std::error_code DelayImportDirectoryEntryRef::
1246 getImportAddress(int AddrIndex, uint64_t &Result) const {
1247 uint32_t RVA = Table[Index].DelayImportAddressTable +
1248 AddrIndex * (OwningObject->is64() ? 8 : 4);
1249 uintptr_t IntPtr = 0;
1250 if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
1252 if (OwningObject->is64())
1253 Result = *reinterpret_cast<const ulittle64_t *>(IntPtr);
1255 Result = *reinterpret_cast<const ulittle32_t *>(IntPtr);
1256 return std::error_code();
1259 bool ExportDirectoryEntryRef::
1260 operator==(const ExportDirectoryEntryRef &Other) const {
1261 return ExportTable == Other.ExportTable && Index == Other.Index;
1264 void ExportDirectoryEntryRef::moveNext() {
1268 // Returns the name of the current export symbol. If the symbol is exported only
1269 // by ordinal, the empty string is set as a result.
1270 std::error_code ExportDirectoryEntryRef::getDllName(StringRef &Result) const {
1271 uintptr_t IntPtr = 0;
1272 if (std::error_code EC =
1273 OwningObject->getRvaPtr(ExportTable->NameRVA, IntPtr))
1275 Result = StringRef(reinterpret_cast<const char *>(IntPtr));
1276 return std::error_code();
1279 // Returns the starting ordinal number.
1281 ExportDirectoryEntryRef::getOrdinalBase(uint32_t &Result) const {
1282 Result = ExportTable->OrdinalBase;
1283 return std::error_code();
1286 // Returns the export ordinal of the current export symbol.
1287 std::error_code ExportDirectoryEntryRef::getOrdinal(uint32_t &Result) const {
1288 Result = ExportTable->OrdinalBase + Index;
1289 return std::error_code();
1292 // Returns the address of the current export symbol.
1293 std::error_code ExportDirectoryEntryRef::getExportRVA(uint32_t &Result) const {
1294 uintptr_t IntPtr = 0;
1295 if (std::error_code EC =
1296 OwningObject->getRvaPtr(ExportTable->ExportAddressTableRVA, IntPtr))
1298 const export_address_table_entry *entry =
1299 reinterpret_cast<const export_address_table_entry *>(IntPtr);
1300 Result = entry[Index].ExportRVA;
1301 return std::error_code();
1304 // Returns the name of the current export symbol. If the symbol is exported only
1305 // by ordinal, the empty string is set as a result.
1307 ExportDirectoryEntryRef::getSymbolName(StringRef &Result) const {
1308 uintptr_t IntPtr = 0;
1309 if (std::error_code EC =
1310 OwningObject->getRvaPtr(ExportTable->OrdinalTableRVA, IntPtr))
1312 const ulittle16_t *Start = reinterpret_cast<const ulittle16_t *>(IntPtr);
1314 uint32_t NumEntries = ExportTable->NumberOfNamePointers;
1316 for (const ulittle16_t *I = Start, *E = Start + NumEntries;
1317 I < E; ++I, ++Offset) {
1320 if (std::error_code EC =
1321 OwningObject->getRvaPtr(ExportTable->NamePointerRVA, IntPtr))
1323 const ulittle32_t *NamePtr = reinterpret_cast<const ulittle32_t *>(IntPtr);
1324 if (std::error_code EC = OwningObject->getRvaPtr(NamePtr[Offset], IntPtr))
1326 Result = StringRef(reinterpret_cast<const char *>(IntPtr));
1327 return std::error_code();
1330 return std::error_code();
1333 bool ImportedSymbolRef::
1334 operator==(const ImportedSymbolRef &Other) const {
1335 return Entry32 == Other.Entry32 && Entry64 == Other.Entry64
1336 && Index == Other.Index;
1339 void ImportedSymbolRef::moveNext() {
1344 ImportedSymbolRef::getSymbolName(StringRef &Result) const {
1347 // If a symbol is imported only by ordinal, it has no name.
1348 if (Entry32[Index].isOrdinal())
1349 return std::error_code();
1350 RVA = Entry32[Index].getHintNameRVA();
1352 if (Entry64[Index].isOrdinal())
1353 return std::error_code();
1354 RVA = Entry64[Index].getHintNameRVA();
1356 uintptr_t IntPtr = 0;
1357 if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
1359 // +2 because the first two bytes is hint.
1360 Result = StringRef(reinterpret_cast<const char *>(IntPtr + 2));
1361 return std::error_code();
1364 std::error_code ImportedSymbolRef::getOrdinal(uint16_t &Result) const {
1367 if (Entry32[Index].isOrdinal()) {
1368 Result = Entry32[Index].getOrdinal();
1369 return std::error_code();
1371 RVA = Entry32[Index].getHintNameRVA();
1373 if (Entry64[Index].isOrdinal()) {
1374 Result = Entry64[Index].getOrdinal();
1375 return std::error_code();
1377 RVA = Entry64[Index].getHintNameRVA();
1379 uintptr_t IntPtr = 0;
1380 if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
1382 Result = *reinterpret_cast<const ulittle16_t *>(IntPtr);
1383 return std::error_code();
1386 ErrorOr<std::unique_ptr<COFFObjectFile>>
1387 ObjectFile::createCOFFObjectFile(MemoryBufferRef Object) {
1389 std::unique_ptr<COFFObjectFile> Ret(new COFFObjectFile(Object, EC));
1392 return std::move(Ret);
1395 bool BaseRelocRef::operator==(const BaseRelocRef &Other) const {
1396 return Header == Other.Header && Index == Other.Index;
1399 void BaseRelocRef::moveNext() {
1400 // Header->BlockSize is the size of the current block, including the
1401 // size of the header itself.
1402 uint32_t Size = sizeof(*Header) +
1403 sizeof(coff_base_reloc_block_entry) * (Index + 1);
1404 if (Size == Header->BlockSize) {
1405 // .reloc contains a list of base relocation blocks. Each block
1406 // consists of the header followed by entries. The header contains
1407 // how many entories will follow. When we reach the end of the
1408 // current block, proceed to the next block.
1409 Header = reinterpret_cast<const coff_base_reloc_block_header *>(
1410 reinterpret_cast<const uint8_t *>(Header) + Size);
1417 std::error_code BaseRelocRef::getType(uint8_t &Type) const {
1418 auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1);
1419 Type = Entry[Index].getType();
1420 return std::error_code();
1423 std::error_code BaseRelocRef::getRVA(uint32_t &Result) const {
1424 auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1);
1425 Result = Header->PageRVA + Entry[Index].getOffset();
1426 return std::error_code();