| //===- yaml2coff - Convert YAML to a COFF object file ---------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// The COFF component of yaml2obj. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/ADT/StringExtras.h" |
| #include "llvm/ADT/StringMap.h" |
| #include "llvm/ADT/StringSwitch.h" |
| #include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h" |
| #include "llvm/DebugInfo/CodeView/StringsAndChecksums.h" |
| #include "llvm/Object/COFF.h" |
| #include "llvm/ObjectYAML/ObjectYAML.h" |
| #include "llvm/ObjectYAML/yaml2obj.h" |
| #include "llvm/Support/Endian.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/SourceMgr.h" |
| #include "llvm/Support/WithColor.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <vector> |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| /// This parses a yaml stream that represents a COFF object file. |
| /// See docs/yaml2obj for the yaml scheema. |
| struct COFFParser { |
| COFFParser(COFFYAML::Object &Obj, yaml::ErrorHandler EH) |
| : Obj(Obj), SectionTableStart(0), SectionTableSize(0), ErrHandler(EH) { |
| // A COFF string table always starts with a 4 byte size field. Offsets into |
| // it include this size, so allocate it now. |
| StringTable.append(4, char(0)); |
| } |
| |
| bool useBigObj() const { |
| return static_cast<int32_t>(Obj.Sections.size()) > |
| COFF::MaxNumberOfSections16; |
| } |
| |
| bool isPE() const { return Obj.OptionalHeader.hasValue(); } |
| bool is64Bit() const { |
| return Obj.Header.Machine == COFF::IMAGE_FILE_MACHINE_AMD64 || |
| Obj.Header.Machine == COFF::IMAGE_FILE_MACHINE_ARM64; |
| } |
| |
| uint32_t getFileAlignment() const { |
| return Obj.OptionalHeader->Header.FileAlignment; |
| } |
| |
| unsigned getHeaderSize() const { |
| return useBigObj() ? COFF::Header32Size : COFF::Header16Size; |
| } |
| |
| unsigned getSymbolSize() const { |
| return useBigObj() ? COFF::Symbol32Size : COFF::Symbol16Size; |
| } |
| |
| bool parseSections() { |
| for (std::vector<COFFYAML::Section>::iterator i = Obj.Sections.begin(), |
| e = Obj.Sections.end(); |
| i != e; ++i) { |
| COFFYAML::Section &Sec = *i; |
| |
| // If the name is less than 8 bytes, store it in place, otherwise |
| // store it in the string table. |
| StringRef Name = Sec.Name; |
| |
| if (Name.size() <= COFF::NameSize) { |
| std::copy(Name.begin(), Name.end(), Sec.Header.Name); |
| } else { |
| // Add string to the string table and format the index for output. |
| unsigned Index = getStringIndex(Name); |
| std::string str = utostr(Index); |
| if (str.size() > 7) { |
| ErrHandler("string table got too large"); |
| return false; |
| } |
| Sec.Header.Name[0] = '/'; |
| std::copy(str.begin(), str.end(), Sec.Header.Name + 1); |
| } |
| |
| if (Sec.Alignment) { |
| if (Sec.Alignment > 8192) { |
| ErrHandler("section alignment is too large"); |
| return false; |
| } |
| if (!isPowerOf2_32(Sec.Alignment)) { |
| ErrHandler("section alignment is not a power of 2"); |
| return false; |
| } |
| Sec.Header.Characteristics |= (Log2_32(Sec.Alignment) + 1) << 20; |
| } |
| } |
| return true; |
| } |
| |
| bool parseSymbols() { |
| for (std::vector<COFFYAML::Symbol>::iterator i = Obj.Symbols.begin(), |
| e = Obj.Symbols.end(); |
| i != e; ++i) { |
| COFFYAML::Symbol &Sym = *i; |
| |
| // If the name is less than 8 bytes, store it in place, otherwise |
| // store it in the string table. |
| StringRef Name = Sym.Name; |
| if (Name.size() <= COFF::NameSize) { |
| std::copy(Name.begin(), Name.end(), Sym.Header.Name); |
| } else { |
| // Add string to the string table and format the index for output. |
| unsigned Index = getStringIndex(Name); |
| *reinterpret_cast<support::aligned_ulittle32_t *>(Sym.Header.Name + 4) = |
| Index; |
| } |
| |
| Sym.Header.Type = Sym.SimpleType; |
| Sym.Header.Type |= Sym.ComplexType << COFF::SCT_COMPLEX_TYPE_SHIFT; |
| } |
| return true; |
| } |
| |
| bool parse() { |
| if (!parseSections()) |
| return false; |
| if (!parseSymbols()) |
| return false; |
| return true; |
| } |
| |
| unsigned getStringIndex(StringRef Str) { |
| StringMap<unsigned>::iterator i = StringTableMap.find(Str); |
| if (i == StringTableMap.end()) { |
| unsigned Index = StringTable.size(); |
| StringTable.append(Str.begin(), Str.end()); |
| StringTable.push_back(0); |
| StringTableMap[Str] = Index; |
| return Index; |
| } |
| return i->second; |
| } |
| |
| COFFYAML::Object &Obj; |
| |
| codeview::StringsAndChecksums StringsAndChecksums; |
| BumpPtrAllocator Allocator; |
| StringMap<unsigned> StringTableMap; |
| std::string StringTable; |
| uint32_t SectionTableStart; |
| uint32_t SectionTableSize; |
| |
| yaml::ErrorHandler ErrHandler; |
| }; |
| |
| enum { DOSStubSize = 128 }; |
| |
| } // end anonymous namespace |
| |
| // Take a CP and assign addresses and sizes to everything. Returns false if the |
| // layout is not valid to do. |
| static bool layoutOptionalHeader(COFFParser &CP) { |
| if (!CP.isPE()) |
| return true; |
| unsigned PEHeaderSize = CP.is64Bit() ? sizeof(object::pe32plus_header) |
| : sizeof(object::pe32_header); |
| CP.Obj.Header.SizeOfOptionalHeader = |
| PEHeaderSize + |
| sizeof(object::data_directory) * (COFF::NUM_DATA_DIRECTORIES + 1); |
| return true; |
| } |
| |
| static yaml::BinaryRef |
| toDebugS(ArrayRef<CodeViewYAML::YAMLDebugSubsection> Subsections, |
| const codeview::StringsAndChecksums &SC, BumpPtrAllocator &Allocator) { |
| using namespace codeview; |
| ExitOnError Err("Error occurred writing .debug$S section"); |
| auto CVSS = |
| Err(CodeViewYAML::toCodeViewSubsectionList(Allocator, Subsections, SC)); |
| |
| std::vector<DebugSubsectionRecordBuilder> Builders; |
| uint32_t Size = sizeof(uint32_t); |
| for (auto &SS : CVSS) { |
| DebugSubsectionRecordBuilder B(SS, CodeViewContainer::ObjectFile); |
| Size += B.calculateSerializedLength(); |
| Builders.push_back(std::move(B)); |
| } |
| uint8_t *Buffer = Allocator.Allocate<uint8_t>(Size); |
| MutableArrayRef<uint8_t> Output(Buffer, Size); |
| BinaryStreamWriter Writer(Output, support::little); |
| |
| Err(Writer.writeInteger<uint32_t>(COFF::DEBUG_SECTION_MAGIC)); |
| for (const auto &B : Builders) { |
| Err(B.commit(Writer)); |
| } |
| return {Output}; |
| } |
| |
| // Take a CP and assign addresses and sizes to everything. Returns false if the |
| // layout is not valid to do. |
| static bool layoutCOFF(COFFParser &CP) { |
| // The section table starts immediately after the header, including the |
| // optional header. |
| CP.SectionTableStart = |
| CP.getHeaderSize() + CP.Obj.Header.SizeOfOptionalHeader; |
| if (CP.isPE()) |
| CP.SectionTableStart += DOSStubSize + sizeof(COFF::PEMagic); |
| CP.SectionTableSize = COFF::SectionSize * CP.Obj.Sections.size(); |
| |
| uint32_t CurrentSectionDataOffset = |
| CP.SectionTableStart + CP.SectionTableSize; |
| |
| for (COFFYAML::Section &S : CP.Obj.Sections) { |
| // We support specifying exactly one of SectionData or Subsections. So if |
| // there is already some SectionData, then we don't need to do any of this. |
| if (S.Name == ".debug$S" && S.SectionData.binary_size() == 0) { |
| CodeViewYAML::initializeStringsAndChecksums(S.DebugS, |
| CP.StringsAndChecksums); |
| if (CP.StringsAndChecksums.hasChecksums() && |
| CP.StringsAndChecksums.hasStrings()) |
| break; |
| } |
| } |
| |
| // Assign each section data address consecutively. |
| for (COFFYAML::Section &S : CP.Obj.Sections) { |
| if (S.Name == ".debug$S") { |
| if (S.SectionData.binary_size() == 0) { |
| assert(CP.StringsAndChecksums.hasStrings() && |
| "Object file does not have debug string table!"); |
| |
| S.SectionData = |
| toDebugS(S.DebugS, CP.StringsAndChecksums, CP.Allocator); |
| } |
| } else if (S.Name == ".debug$T") { |
| if (S.SectionData.binary_size() == 0) |
| S.SectionData = CodeViewYAML::toDebugT(S.DebugT, CP.Allocator, S.Name); |
| } else if (S.Name == ".debug$P") { |
| if (S.SectionData.binary_size() == 0) |
| S.SectionData = CodeViewYAML::toDebugT(S.DebugP, CP.Allocator, S.Name); |
| } else if (S.Name == ".debug$H") { |
| if (S.DebugH.hasValue() && S.SectionData.binary_size() == 0) |
| S.SectionData = CodeViewYAML::toDebugH(*S.DebugH, CP.Allocator); |
| } |
| |
| if (S.SectionData.binary_size() > 0) { |
| CurrentSectionDataOffset = alignTo(CurrentSectionDataOffset, |
| CP.isPE() ? CP.getFileAlignment() : 4); |
| S.Header.SizeOfRawData = S.SectionData.binary_size(); |
| if (CP.isPE()) |
| S.Header.SizeOfRawData = |
| alignTo(S.Header.SizeOfRawData, CP.getFileAlignment()); |
| S.Header.PointerToRawData = CurrentSectionDataOffset; |
| CurrentSectionDataOffset += S.Header.SizeOfRawData; |
| if (!S.Relocations.empty()) { |
| S.Header.PointerToRelocations = CurrentSectionDataOffset; |
| if (S.Header.Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) { |
| S.Header.NumberOfRelocations = 0xffff; |
| CurrentSectionDataOffset += COFF::RelocationSize; |
| } else |
| S.Header.NumberOfRelocations = S.Relocations.size(); |
| CurrentSectionDataOffset += S.Relocations.size() * COFF::RelocationSize; |
| } |
| } else { |
| // Leave SizeOfRawData unaltered. For .bss sections in object files, it |
| // carries the section size. |
| S.Header.PointerToRawData = 0; |
| } |
| } |
| |
| uint32_t SymbolTableStart = CurrentSectionDataOffset; |
| |
| // Calculate number of symbols. |
| uint32_t NumberOfSymbols = 0; |
| for (std::vector<COFFYAML::Symbol>::iterator i = CP.Obj.Symbols.begin(), |
| e = CP.Obj.Symbols.end(); |
| i != e; ++i) { |
| uint32_t NumberOfAuxSymbols = 0; |
| if (i->FunctionDefinition) |
| NumberOfAuxSymbols += 1; |
| if (i->bfAndefSymbol) |
| NumberOfAuxSymbols += 1; |
| if (i->WeakExternal) |
| NumberOfAuxSymbols += 1; |
| if (!i->File.empty()) |
| NumberOfAuxSymbols += |
| (i->File.size() + CP.getSymbolSize() - 1) / CP.getSymbolSize(); |
| if (i->SectionDefinition) |
| NumberOfAuxSymbols += 1; |
| if (i->CLRToken) |
| NumberOfAuxSymbols += 1; |
| i->Header.NumberOfAuxSymbols = NumberOfAuxSymbols; |
| NumberOfSymbols += 1 + NumberOfAuxSymbols; |
| } |
| |
| // Store all the allocated start addresses in the header. |
| CP.Obj.Header.NumberOfSections = CP.Obj.Sections.size(); |
| CP.Obj.Header.NumberOfSymbols = NumberOfSymbols; |
| if (NumberOfSymbols > 0 || CP.StringTable.size() > 4) |
| CP.Obj.Header.PointerToSymbolTable = SymbolTableStart; |
| else |
| CP.Obj.Header.PointerToSymbolTable = 0; |
| |
| *reinterpret_cast<support::ulittle32_t *>(&CP.StringTable[0]) = |
| CP.StringTable.size(); |
| |
| return true; |
| } |
| |
| template <typename value_type> struct binary_le_impl { |
| value_type Value; |
| binary_le_impl(value_type V) : Value(V) {} |
| }; |
| |
| template <typename value_type> |
| raw_ostream &operator<<(raw_ostream &OS, |
| const binary_le_impl<value_type> &BLE) { |
| char Buffer[sizeof(BLE.Value)]; |
| support::endian::write<value_type, support::little, support::unaligned>( |
| Buffer, BLE.Value); |
| OS.write(Buffer, sizeof(BLE.Value)); |
| return OS; |
| } |
| |
| template <typename value_type> |
| binary_le_impl<value_type> binary_le(value_type V) { |
| return binary_le_impl<value_type>(V); |
| } |
| |
| template <size_t NumBytes> struct zeros_impl {}; |
| |
| template <size_t NumBytes> |
| raw_ostream &operator<<(raw_ostream &OS, const zeros_impl<NumBytes> &) { |
| char Buffer[NumBytes]; |
| memset(Buffer, 0, sizeof(Buffer)); |
| OS.write(Buffer, sizeof(Buffer)); |
| return OS; |
| } |
| |
| template <typename T> zeros_impl<sizeof(T)> zeros(const T &) { |
| return zeros_impl<sizeof(T)>(); |
| } |
| |
| template <typename T> |
| static uint32_t initializeOptionalHeader(COFFParser &CP, uint16_t Magic, |
| T Header) { |
| memset(Header, 0, sizeof(*Header)); |
| Header->Magic = Magic; |
| Header->SectionAlignment = CP.Obj.OptionalHeader->Header.SectionAlignment; |
| Header->FileAlignment = CP.Obj.OptionalHeader->Header.FileAlignment; |
| uint32_t SizeOfCode = 0, SizeOfInitializedData = 0, |
| SizeOfUninitializedData = 0; |
| uint32_t SizeOfHeaders = alignTo(CP.SectionTableStart + CP.SectionTableSize, |
| Header->FileAlignment); |
| uint32_t SizeOfImage = alignTo(SizeOfHeaders, Header->SectionAlignment); |
| uint32_t BaseOfData = 0; |
| for (const COFFYAML::Section &S : CP.Obj.Sections) { |
| if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_CODE) |
| SizeOfCode += S.Header.SizeOfRawData; |
| if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA) |
| SizeOfInitializedData += S.Header.SizeOfRawData; |
| if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) |
| SizeOfUninitializedData += S.Header.SizeOfRawData; |
| if (S.Name.equals(".text")) |
| Header->BaseOfCode = S.Header.VirtualAddress; // RVA |
| else if (S.Name.equals(".data")) |
| BaseOfData = S.Header.VirtualAddress; // RVA |
| if (S.Header.VirtualAddress) |
| SizeOfImage += alignTo(S.Header.VirtualSize, Header->SectionAlignment); |
| } |
| Header->SizeOfCode = SizeOfCode; |
| Header->SizeOfInitializedData = SizeOfInitializedData; |
| Header->SizeOfUninitializedData = SizeOfUninitializedData; |
| Header->AddressOfEntryPoint = |
| CP.Obj.OptionalHeader->Header.AddressOfEntryPoint; // RVA |
| Header->ImageBase = CP.Obj.OptionalHeader->Header.ImageBase; |
| Header->MajorOperatingSystemVersion = |
| CP.Obj.OptionalHeader->Header.MajorOperatingSystemVersion; |
| Header->MinorOperatingSystemVersion = |
| CP.Obj.OptionalHeader->Header.MinorOperatingSystemVersion; |
| Header->MajorImageVersion = CP.Obj.OptionalHeader->Header.MajorImageVersion; |
| Header->MinorImageVersion = CP.Obj.OptionalHeader->Header.MinorImageVersion; |
| Header->MajorSubsystemVersion = |
| CP.Obj.OptionalHeader->Header.MajorSubsystemVersion; |
| Header->MinorSubsystemVersion = |
| CP.Obj.OptionalHeader->Header.MinorSubsystemVersion; |
| Header->SizeOfImage = SizeOfImage; |
| Header->SizeOfHeaders = SizeOfHeaders; |
| Header->Subsystem = CP.Obj.OptionalHeader->Header.Subsystem; |
| Header->DLLCharacteristics = CP.Obj.OptionalHeader->Header.DLLCharacteristics; |
| Header->SizeOfStackReserve = CP.Obj.OptionalHeader->Header.SizeOfStackReserve; |
| Header->SizeOfStackCommit = CP.Obj.OptionalHeader->Header.SizeOfStackCommit; |
| Header->SizeOfHeapReserve = CP.Obj.OptionalHeader->Header.SizeOfHeapReserve; |
| Header->SizeOfHeapCommit = CP.Obj.OptionalHeader->Header.SizeOfHeapCommit; |
| Header->NumberOfRvaAndSize = COFF::NUM_DATA_DIRECTORIES + 1; |
| return BaseOfData; |
| } |
| |
| static bool writeCOFF(COFFParser &CP, raw_ostream &OS) { |
| if (CP.isPE()) { |
| // PE files start with a DOS stub. |
| object::dos_header DH; |
| memset(&DH, 0, sizeof(DH)); |
| |
| // DOS EXEs start with "MZ" magic. |
| DH.Magic[0] = 'M'; |
| DH.Magic[1] = 'Z'; |
| // Initializing the AddressOfRelocationTable is strictly optional but |
| // mollifies certain tools which expect it to have a value greater than |
| // 0x40. |
| DH.AddressOfRelocationTable = sizeof(DH); |
| // This is the address of the PE signature. |
| DH.AddressOfNewExeHeader = DOSStubSize; |
| |
| // Write out our DOS stub. |
| OS.write(reinterpret_cast<char *>(&DH), sizeof(DH)); |
| // Write padding until we reach the position of where our PE signature |
| // should live. |
| OS.write_zeros(DOSStubSize - sizeof(DH)); |
| // Write out the PE signature. |
| OS.write(COFF::PEMagic, sizeof(COFF::PEMagic)); |
| } |
| if (CP.useBigObj()) { |
| OS << binary_le(static_cast<uint16_t>(COFF::IMAGE_FILE_MACHINE_UNKNOWN)) |
| << binary_le(static_cast<uint16_t>(0xffff)) |
| << binary_le( |
| static_cast<uint16_t>(COFF::BigObjHeader::MinBigObjectVersion)) |
| << binary_le(CP.Obj.Header.Machine) |
| << binary_le(CP.Obj.Header.TimeDateStamp); |
| OS.write(COFF::BigObjMagic, sizeof(COFF::BigObjMagic)); |
| OS << zeros(uint32_t(0)) << zeros(uint32_t(0)) << zeros(uint32_t(0)) |
| << zeros(uint32_t(0)) << binary_le(CP.Obj.Header.NumberOfSections) |
| << binary_le(CP.Obj.Header.PointerToSymbolTable) |
| << binary_le(CP.Obj.Header.NumberOfSymbols); |
| } else { |
| OS << binary_le(CP.Obj.Header.Machine) |
| << binary_le(static_cast<int16_t>(CP.Obj.Header.NumberOfSections)) |
| << binary_le(CP.Obj.Header.TimeDateStamp) |
| << binary_le(CP.Obj.Header.PointerToSymbolTable) |
| << binary_le(CP.Obj.Header.NumberOfSymbols) |
| << binary_le(CP.Obj.Header.SizeOfOptionalHeader) |
| << binary_le(CP.Obj.Header.Characteristics); |
| } |
| if (CP.isPE()) { |
| if (CP.is64Bit()) { |
| object::pe32plus_header PEH; |
| initializeOptionalHeader(CP, COFF::PE32Header::PE32_PLUS, &PEH); |
| OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH)); |
| } else { |
| object::pe32_header PEH; |
| uint32_t BaseOfData = |
| initializeOptionalHeader(CP, COFF::PE32Header::PE32, &PEH); |
| PEH.BaseOfData = BaseOfData; |
| OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH)); |
| } |
| for (const Optional<COFF::DataDirectory> &DD : |
| CP.Obj.OptionalHeader->DataDirectories) { |
| if (!DD.hasValue()) { |
| OS << zeros(uint32_t(0)); |
| OS << zeros(uint32_t(0)); |
| } else { |
| OS << binary_le(DD->RelativeVirtualAddress); |
| OS << binary_le(DD->Size); |
| } |
| } |
| OS << zeros(uint32_t(0)); |
| OS << zeros(uint32_t(0)); |
| } |
| |
| assert(OS.tell() == CP.SectionTableStart); |
| // Output section table. |
| for (std::vector<COFFYAML::Section>::iterator i = CP.Obj.Sections.begin(), |
| e = CP.Obj.Sections.end(); |
| i != e; ++i) { |
| OS.write(i->Header.Name, COFF::NameSize); |
| OS << binary_le(i->Header.VirtualSize) |
| << binary_le(i->Header.VirtualAddress) |
| << binary_le(i->Header.SizeOfRawData) |
| << binary_le(i->Header.PointerToRawData) |
| << binary_le(i->Header.PointerToRelocations) |
| << binary_le(i->Header.PointerToLineNumbers) |
| << binary_le(i->Header.NumberOfRelocations) |
| << binary_le(i->Header.NumberOfLineNumbers) |
| << binary_le(i->Header.Characteristics); |
| } |
| assert(OS.tell() == CP.SectionTableStart + CP.SectionTableSize); |
| |
| unsigned CurSymbol = 0; |
| StringMap<unsigned> SymbolTableIndexMap; |
| for (std::vector<COFFYAML::Symbol>::iterator I = CP.Obj.Symbols.begin(), |
| E = CP.Obj.Symbols.end(); |
| I != E; ++I) { |
| SymbolTableIndexMap[I->Name] = CurSymbol; |
| CurSymbol += 1 + I->Header.NumberOfAuxSymbols; |
| } |
| |
| // Output section data. |
| for (const COFFYAML::Section &S : CP.Obj.Sections) { |
| if (S.Header.SizeOfRawData == 0 || S.Header.PointerToRawData == 0) |
| continue; |
| assert(S.Header.PointerToRawData >= OS.tell()); |
| OS.write_zeros(S.Header.PointerToRawData - OS.tell()); |
| S.SectionData.writeAsBinary(OS); |
| assert(S.Header.SizeOfRawData >= S.SectionData.binary_size()); |
| OS.write_zeros(S.Header.SizeOfRawData - S.SectionData.binary_size()); |
| if (S.Header.Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) |
| OS << binary_le<uint32_t>(/*VirtualAddress=*/ S.Relocations.size() + 1) |
| << binary_le<uint32_t>(/*SymbolTableIndex=*/ 0) |
| << binary_le<uint16_t>(/*Type=*/ 0); |
| for (const COFFYAML::Relocation &R : S.Relocations) { |
| uint32_t SymbolTableIndex; |
| if (R.SymbolTableIndex) { |
| if (!R.SymbolName.empty()) |
| WithColor::error() |
| << "Both SymbolName and SymbolTableIndex specified\n"; |
| SymbolTableIndex = *R.SymbolTableIndex; |
| } else { |
| SymbolTableIndex = SymbolTableIndexMap[R.SymbolName]; |
| } |
| OS << binary_le(R.VirtualAddress) << binary_le(SymbolTableIndex) |
| << binary_le(R.Type); |
| } |
| } |
| |
| // Output symbol table. |
| |
| for (std::vector<COFFYAML::Symbol>::const_iterator i = CP.Obj.Symbols.begin(), |
| e = CP.Obj.Symbols.end(); |
| i != e; ++i) { |
| OS.write(i->Header.Name, COFF::NameSize); |
| OS << binary_le(i->Header.Value); |
| if (CP.useBigObj()) |
| OS << binary_le(i->Header.SectionNumber); |
| else |
| OS << binary_le(static_cast<int16_t>(i->Header.SectionNumber)); |
| OS << binary_le(i->Header.Type) << binary_le(i->Header.StorageClass) |
| << binary_le(i->Header.NumberOfAuxSymbols); |
| |
| if (i->FunctionDefinition) { |
| OS << binary_le(i->FunctionDefinition->TagIndex) |
| << binary_le(i->FunctionDefinition->TotalSize) |
| << binary_le(i->FunctionDefinition->PointerToLinenumber) |
| << binary_le(i->FunctionDefinition->PointerToNextFunction) |
| << zeros(i->FunctionDefinition->unused); |
| OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); |
| } |
| if (i->bfAndefSymbol) { |
| OS << zeros(i->bfAndefSymbol->unused1) |
| << binary_le(i->bfAndefSymbol->Linenumber) |
| << zeros(i->bfAndefSymbol->unused2) |
| << binary_le(i->bfAndefSymbol->PointerToNextFunction) |
| << zeros(i->bfAndefSymbol->unused3); |
| OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); |
| } |
| if (i->WeakExternal) { |
| OS << binary_le(i->WeakExternal->TagIndex) |
| << binary_le(i->WeakExternal->Characteristics) |
| << zeros(i->WeakExternal->unused); |
| OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); |
| } |
| if (!i->File.empty()) { |
| unsigned SymbolSize = CP.getSymbolSize(); |
| uint32_t NumberOfAuxRecords = |
| (i->File.size() + SymbolSize - 1) / SymbolSize; |
| uint32_t NumberOfAuxBytes = NumberOfAuxRecords * SymbolSize; |
| uint32_t NumZeros = NumberOfAuxBytes - i->File.size(); |
| OS.write(i->File.data(), i->File.size()); |
| OS.write_zeros(NumZeros); |
| } |
| if (i->SectionDefinition) { |
| OS << binary_le(i->SectionDefinition->Length) |
| << binary_le(i->SectionDefinition->NumberOfRelocations) |
| << binary_le(i->SectionDefinition->NumberOfLinenumbers) |
| << binary_le(i->SectionDefinition->CheckSum) |
| << binary_le(static_cast<int16_t>(i->SectionDefinition->Number)) |
| << binary_le(i->SectionDefinition->Selection) |
| << zeros(i->SectionDefinition->unused) |
| << binary_le(static_cast<int16_t>(i->SectionDefinition->Number >> 16)); |
| OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); |
| } |
| if (i->CLRToken) { |
| OS << binary_le(i->CLRToken->AuxType) << zeros(i->CLRToken->unused1) |
| << binary_le(i->CLRToken->SymbolTableIndex) |
| << zeros(i->CLRToken->unused2); |
| OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); |
| } |
| } |
| |
| // Output string table. |
| if (CP.Obj.Header.PointerToSymbolTable) |
| OS.write(&CP.StringTable[0], CP.StringTable.size()); |
| return true; |
| } |
| |
| namespace llvm { |
| namespace yaml { |
| |
| bool yaml2coff(llvm::COFFYAML::Object &Doc, raw_ostream &Out, |
| ErrorHandler ErrHandler) { |
| COFFParser CP(Doc, ErrHandler); |
| if (!CP.parse()) { |
| ErrHandler("failed to parse YAML file"); |
| return false; |
| } |
| |
| if (!layoutOptionalHeader(CP)) { |
| ErrHandler("failed to layout optional header for COFF file"); |
| return false; |
| } |
| |
| if (!layoutCOFF(CP)) { |
| ErrHandler("failed to layout COFF file"); |
| return false; |
| } |
| if (!writeCOFF(CP, Out)) { |
| ErrHandler("failed to write COFF file"); |
| return false; |
| } |
| return true; |
| } |
| |
| } // namespace yaml |
| } // namespace llvm |
