644 lines · cpp
1//===- yaml2coff - Convert YAML to a COFF object file ---------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8///9/// \file10/// The COFF component of yaml2obj.11///12//===----------------------------------------------------------------------===//13 14#include "llvm/ADT/StringExtras.h"15#include "llvm/ADT/StringMap.h"16#include "llvm/DebugInfo/CodeView/StringsAndChecksums.h"17#include "llvm/ObjectYAML/ObjectYAML.h"18#include "llvm/ObjectYAML/yaml2obj.h"19#include "llvm/Support/BinaryStreamWriter.h"20#include "llvm/Support/Endian.h"21#include "llvm/Support/SourceMgr.h"22#include "llvm/Support/WithColor.h"23#include "llvm/Support/raw_ostream.h"24#include <optional>25#include <vector>26 27using namespace llvm;28 29namespace {30 31/// This parses a yaml stream that represents a COFF object file.32/// See docs/yaml2obj for the yaml scheema.33struct COFFParser {34 COFFParser(COFFYAML::Object &Obj, yaml::ErrorHandler EH)35 : Obj(Obj), SectionTableStart(0), SectionTableSize(0), ErrHandler(EH) {36 // A COFF string table always starts with a 4 byte size field. Offsets into37 // it include this size, so allocate it now.38 StringTable.append(4, char(0));39 }40 41 bool useBigObj() const {42 return static_cast<int32_t>(Obj.Sections.size()) >43 COFF::MaxNumberOfSections16;44 }45 46 bool isPE() const { return Obj.OptionalHeader.has_value(); }47 bool is64Bit() const { return COFF::is64Bit(Obj.Header.Machine); }48 49 uint32_t getFileAlignment() const {50 return Obj.OptionalHeader->Header.FileAlignment;51 }52 53 unsigned getHeaderSize() const {54 return useBigObj() ? COFF::Header32Size : COFF::Header16Size;55 }56 57 unsigned getSymbolSize() const {58 return useBigObj() ? COFF::Symbol32Size : COFF::Symbol16Size;59 }60 61 bool parseSections() {62 for (COFFYAML::Section &Sec : Obj.Sections) {63 // If the name is less than 8 bytes, store it in place, otherwise64 // store it in the string table.65 StringRef Name = Sec.Name;66 67 if (Name.size() <= COFF::NameSize) {68 llvm::copy(Name, Sec.Header.Name);69 } else {70 // Add string to the string table and format the index for output.71 unsigned Index = getStringIndex(Name);72 std::string str = utostr(Index);73 if (str.size() > 7) {74 ErrHandler("string table got too large");75 return false;76 }77 Sec.Header.Name[0] = '/';78 llvm::copy(str, Sec.Header.Name + 1);79 }80 81 if (Sec.Alignment) {82 if (Sec.Alignment > 8192) {83 ErrHandler("section alignment is too large");84 return false;85 }86 if (!isPowerOf2_32(Sec.Alignment)) {87 ErrHandler("section alignment is not a power of 2");88 return false;89 }90 Sec.Header.Characteristics |= (Log2_32(Sec.Alignment) + 1) << 20;91 }92 }93 return true;94 }95 96 bool parseSymbols() {97 for (COFFYAML::Symbol &Sym : Obj.Symbols) {98 // If the name is less than 8 bytes, store it in place, otherwise99 // store it in the string table.100 StringRef Name = Sym.Name;101 if (Name.size() <= COFF::NameSize) {102 llvm::copy(Name, Sym.Header.Name);103 } else {104 // Add string to the string table and format the index for output.105 unsigned Index = getStringIndex(Name);106 *reinterpret_cast<support::aligned_ulittle32_t *>(Sym.Header.Name + 4) =107 Index;108 }109 110 Sym.Header.Type = Sym.SimpleType;111 Sym.Header.Type |= Sym.ComplexType << COFF::SCT_COMPLEX_TYPE_SHIFT;112 }113 return true;114 }115 116 bool parse() {117 if (!parseSections())118 return false;119 if (!parseSymbols())120 return false;121 return true;122 }123 124 unsigned getStringIndex(StringRef Str) {125 auto [It, Inserted] = StringTableMap.try_emplace(Str, StringTable.size());126 if (Inserted) {127 StringTable.append(Str.begin(), Str.end());128 StringTable.push_back(0);129 }130 return It->second;131 }132 133 COFFYAML::Object &Obj;134 135 codeview::StringsAndChecksums StringsAndChecksums;136 BumpPtrAllocator Allocator;137 StringMap<unsigned> StringTableMap;138 std::string StringTable;139 uint32_t SectionTableStart;140 uint32_t SectionTableSize;141 142 yaml::ErrorHandler ErrHandler;143};144 145enum { DOSStubSize = 128 };146 147} // end anonymous namespace148 149// Take a CP and assign addresses and sizes to everything. Returns false if the150// layout is not valid to do.151static bool layoutOptionalHeader(COFFParser &CP) {152 if (!CP.isPE())153 return true;154 unsigned PEHeaderSize = CP.is64Bit() ? sizeof(object::pe32plus_header)155 : sizeof(object::pe32_header);156 CP.Obj.Header.SizeOfOptionalHeader =157 PEHeaderSize + sizeof(object::data_directory) *158 CP.Obj.OptionalHeader->Header.NumberOfRvaAndSize;159 return true;160}161 162static yaml::BinaryRef163toDebugS(ArrayRef<CodeViewYAML::YAMLDebugSubsection> Subsections,164 const codeview::StringsAndChecksums &SC, BumpPtrAllocator &Allocator) {165 using namespace codeview;166 ExitOnError Err("Error occurred writing .debug$S section");167 auto CVSS =168 Err(CodeViewYAML::toCodeViewSubsectionList(Allocator, Subsections, SC));169 170 std::vector<DebugSubsectionRecordBuilder> Builders;171 uint32_t Size = sizeof(uint32_t);172 for (auto &SS : CVSS) {173 DebugSubsectionRecordBuilder B(SS);174 Size += B.calculateSerializedLength();175 Builders.push_back(std::move(B));176 }177 uint8_t *Buffer = Allocator.Allocate<uint8_t>(Size);178 MutableArrayRef<uint8_t> Output(Buffer, Size);179 BinaryStreamWriter Writer(Output, llvm::endianness::little);180 181 Err(Writer.writeInteger<uint32_t>(COFF::DEBUG_SECTION_MAGIC));182 for (const auto &B : Builders) {183 Err(B.commit(Writer, CodeViewContainer::ObjectFile));184 }185 return {Output};186}187 188// Take a CP and assign addresses and sizes to everything. Returns false if the189// layout is not valid to do.190static bool layoutCOFF(COFFParser &CP) {191 // The section table starts immediately after the header, including the192 // optional header.193 CP.SectionTableStart =194 CP.getHeaderSize() + CP.Obj.Header.SizeOfOptionalHeader;195 if (CP.isPE())196 CP.SectionTableStart += DOSStubSize + sizeof(COFF::PEMagic);197 CP.SectionTableSize = COFF::SectionSize * CP.Obj.Sections.size();198 199 uint32_t CurrentSectionDataOffset =200 CP.SectionTableStart + CP.SectionTableSize;201 202 for (COFFYAML::Section &S : CP.Obj.Sections) {203 // We support specifying exactly one of SectionData or Subsections. So if204 // there is already some SectionData, then we don't need to do any of this.205 if (S.Name == ".debug$S" && S.SectionData.binary_size() == 0) {206 CodeViewYAML::initializeStringsAndChecksums(S.DebugS,207 CP.StringsAndChecksums);208 if (CP.StringsAndChecksums.hasChecksums() &&209 CP.StringsAndChecksums.hasStrings())210 break;211 }212 }213 214 // Assign each section data address consecutively.215 for (COFFYAML::Section &S : CP.Obj.Sections) {216 if (S.Name == ".debug$S") {217 if (S.SectionData.binary_size() == 0) {218 assert(CP.StringsAndChecksums.hasStrings() &&219 "Object file does not have debug string table!");220 221 S.SectionData =222 toDebugS(S.DebugS, CP.StringsAndChecksums, CP.Allocator);223 }224 } else if (S.Name == ".debug$T") {225 if (S.SectionData.binary_size() == 0)226 S.SectionData = CodeViewYAML::toDebugT(S.DebugT, CP.Allocator, S.Name);227 } else if (S.Name == ".debug$P") {228 if (S.SectionData.binary_size() == 0)229 S.SectionData = CodeViewYAML::toDebugT(S.DebugP, CP.Allocator, S.Name);230 } else if (S.Name == ".debug$H") {231 if (S.DebugH && S.SectionData.binary_size() == 0)232 S.SectionData = CodeViewYAML::toDebugH(*S.DebugH, CP.Allocator);233 }234 235 size_t DataSize = S.SectionData.binary_size();236 for (auto E : S.StructuredData)237 DataSize += E.size();238 if (DataSize > 0) {239 CurrentSectionDataOffset = alignTo(CurrentSectionDataOffset,240 CP.isPE() ? CP.getFileAlignment() : 4);241 S.Header.SizeOfRawData = DataSize;242 if (CP.isPE())243 S.Header.SizeOfRawData =244 alignTo(S.Header.SizeOfRawData, CP.getFileAlignment());245 S.Header.PointerToRawData = CurrentSectionDataOffset;246 CurrentSectionDataOffset += S.Header.SizeOfRawData;247 if (!S.Relocations.empty()) {248 S.Header.PointerToRelocations = CurrentSectionDataOffset;249 if (S.Header.Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) {250 S.Header.NumberOfRelocations = 0xffff;251 CurrentSectionDataOffset += COFF::RelocationSize;252 } else253 S.Header.NumberOfRelocations = S.Relocations.size();254 CurrentSectionDataOffset += S.Relocations.size() * COFF::RelocationSize;255 }256 } else {257 // Leave SizeOfRawData unaltered. For .bss sections in object files, it258 // carries the section size.259 S.Header.PointerToRawData = 0;260 }261 }262 263 uint32_t SymbolTableStart = CurrentSectionDataOffset;264 265 // Calculate number of symbols.266 uint32_t NumberOfSymbols = 0;267 for (std::vector<COFFYAML::Symbol>::iterator i = CP.Obj.Symbols.begin(),268 e = CP.Obj.Symbols.end();269 i != e; ++i) {270 uint32_t NumberOfAuxSymbols = 0;271 if (i->FunctionDefinition)272 NumberOfAuxSymbols += 1;273 if (i->bfAndefSymbol)274 NumberOfAuxSymbols += 1;275 if (i->WeakExternal)276 NumberOfAuxSymbols += 1;277 if (!i->File.empty())278 NumberOfAuxSymbols +=279 (i->File.size() + CP.getSymbolSize() - 1) / CP.getSymbolSize();280 if (i->SectionDefinition)281 NumberOfAuxSymbols += 1;282 if (i->CLRToken)283 NumberOfAuxSymbols += 1;284 i->Header.NumberOfAuxSymbols = NumberOfAuxSymbols;285 NumberOfSymbols += 1 + NumberOfAuxSymbols;286 }287 288 // Store all the allocated start addresses in the header.289 CP.Obj.Header.NumberOfSections = CP.Obj.Sections.size();290 CP.Obj.Header.NumberOfSymbols = NumberOfSymbols;291 if (NumberOfSymbols > 0 || CP.StringTable.size() > 4)292 CP.Obj.Header.PointerToSymbolTable = SymbolTableStart;293 else294 CP.Obj.Header.PointerToSymbolTable = 0;295 296 *reinterpret_cast<support::ulittle32_t *>(&CP.StringTable[0]) =297 CP.StringTable.size();298 299 return true;300}301 302template <typename value_type> struct binary_le_impl {303 value_type Value;304 binary_le_impl(value_type V) : Value(V) {}305};306 307template <typename value_type>308raw_ostream &operator<<(raw_ostream &OS,309 const binary_le_impl<value_type> &BLE) {310 char Buffer[sizeof(BLE.Value)];311 support::endian::write<value_type, llvm::endianness::little>(Buffer,312 BLE.Value);313 OS.write(Buffer, sizeof(BLE.Value));314 return OS;315}316 317template <typename value_type>318binary_le_impl<value_type> binary_le(value_type V) {319 return binary_le_impl<value_type>(V);320}321 322template <size_t NumBytes> struct zeros_impl {};323 324template <size_t NumBytes>325raw_ostream &operator<<(raw_ostream &OS, const zeros_impl<NumBytes> &) {326 char Buffer[NumBytes];327 memset(Buffer, 0, sizeof(Buffer));328 OS.write(Buffer, sizeof(Buffer));329 return OS;330}331 332template <typename T> zeros_impl<sizeof(T)> zeros(const T &) {333 return zeros_impl<sizeof(T)>();334}335 336template <typename T>337static uint32_t initializeOptionalHeader(COFFParser &CP, uint16_t Magic,338 T Header) {339 memset(Header, 0, sizeof(*Header));340 Header->Magic = Magic;341 Header->SectionAlignment = CP.Obj.OptionalHeader->Header.SectionAlignment;342 Header->FileAlignment = CP.Obj.OptionalHeader->Header.FileAlignment;343 uint32_t SizeOfCode = 0, SizeOfInitializedData = 0,344 SizeOfUninitializedData = 0;345 uint32_t SizeOfHeaders = alignTo(CP.SectionTableStart + CP.SectionTableSize,346 Header->FileAlignment);347 uint32_t SizeOfImage = alignTo(SizeOfHeaders, Header->SectionAlignment);348 uint32_t BaseOfData = 0;349 for (const COFFYAML::Section &S : CP.Obj.Sections) {350 if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_CODE)351 SizeOfCode += S.Header.SizeOfRawData;352 if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)353 SizeOfInitializedData += S.Header.SizeOfRawData;354 if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)355 SizeOfUninitializedData += S.Header.SizeOfRawData;356 if (S.Name == ".text")357 Header->BaseOfCode = S.Header.VirtualAddress; // RVA358 else if (S.Name == ".data")359 BaseOfData = S.Header.VirtualAddress; // RVA360 if (S.Header.VirtualAddress)361 SizeOfImage += alignTo(S.Header.VirtualSize, Header->SectionAlignment);362 }363 Header->SizeOfCode = SizeOfCode;364 Header->SizeOfInitializedData = SizeOfInitializedData;365 Header->SizeOfUninitializedData = SizeOfUninitializedData;366 Header->AddressOfEntryPoint =367 CP.Obj.OptionalHeader->Header.AddressOfEntryPoint; // RVA368 Header->ImageBase = CP.Obj.OptionalHeader->Header.ImageBase;369 Header->MajorOperatingSystemVersion =370 CP.Obj.OptionalHeader->Header.MajorOperatingSystemVersion;371 Header->MinorOperatingSystemVersion =372 CP.Obj.OptionalHeader->Header.MinorOperatingSystemVersion;373 Header->MajorImageVersion = CP.Obj.OptionalHeader->Header.MajorImageVersion;374 Header->MinorImageVersion = CP.Obj.OptionalHeader->Header.MinorImageVersion;375 Header->MajorSubsystemVersion =376 CP.Obj.OptionalHeader->Header.MajorSubsystemVersion;377 Header->MinorSubsystemVersion =378 CP.Obj.OptionalHeader->Header.MinorSubsystemVersion;379 Header->SizeOfImage = SizeOfImage;380 Header->SizeOfHeaders = SizeOfHeaders;381 Header->Subsystem = CP.Obj.OptionalHeader->Header.Subsystem;382 Header->DLLCharacteristics = CP.Obj.OptionalHeader->Header.DLLCharacteristics;383 Header->SizeOfStackReserve = CP.Obj.OptionalHeader->Header.SizeOfStackReserve;384 Header->SizeOfStackCommit = CP.Obj.OptionalHeader->Header.SizeOfStackCommit;385 Header->SizeOfHeapReserve = CP.Obj.OptionalHeader->Header.SizeOfHeapReserve;386 Header->SizeOfHeapCommit = CP.Obj.OptionalHeader->Header.SizeOfHeapCommit;387 Header->NumberOfRvaAndSize = CP.Obj.OptionalHeader->Header.NumberOfRvaAndSize;388 return BaseOfData;389}390 391static bool writeCOFF(COFFParser &CP, raw_ostream &OS) {392 if (CP.isPE()) {393 // PE files start with a DOS stub.394 object::dos_header DH;395 memset(&DH, 0, sizeof(DH));396 397 // DOS EXEs start with "MZ" magic.398 DH.Magic[0] = 'M';399 DH.Magic[1] = 'Z';400 // Initializing the AddressOfRelocationTable is strictly optional but401 // mollifies certain tools which expect it to have a value greater than402 // 0x40.403 DH.AddressOfRelocationTable = sizeof(DH);404 // This is the address of the PE signature.405 DH.AddressOfNewExeHeader = DOSStubSize;406 407 // Write out our DOS stub.408 OS.write(reinterpret_cast<char *>(&DH), sizeof(DH));409 // Write padding until we reach the position of where our PE signature410 // should live.411 OS.write_zeros(DOSStubSize - sizeof(DH));412 // Write out the PE signature.413 OS.write(COFF::PEMagic, sizeof(COFF::PEMagic));414 }415 if (CP.useBigObj()) {416 OS << binary_le(static_cast<uint16_t>(COFF::IMAGE_FILE_MACHINE_UNKNOWN))417 << binary_le(static_cast<uint16_t>(0xffff))418 << binary_le(419 static_cast<uint16_t>(COFF::BigObjHeader::MinBigObjectVersion))420 << binary_le(CP.Obj.Header.Machine)421 << binary_le(CP.Obj.Header.TimeDateStamp);422 OS.write(COFF::BigObjMagic, sizeof(COFF::BigObjMagic));423 OS << zeros(uint32_t(0)) << zeros(uint32_t(0)) << zeros(uint32_t(0))424 << zeros(uint32_t(0)) << binary_le(CP.Obj.Header.NumberOfSections)425 << binary_le(CP.Obj.Header.PointerToSymbolTable)426 << binary_le(CP.Obj.Header.NumberOfSymbols);427 } else {428 OS << binary_le(CP.Obj.Header.Machine)429 << binary_le(static_cast<int16_t>(CP.Obj.Header.NumberOfSections))430 << binary_le(CP.Obj.Header.TimeDateStamp)431 << binary_le(CP.Obj.Header.PointerToSymbolTable)432 << binary_le(CP.Obj.Header.NumberOfSymbols)433 << binary_le(CP.Obj.Header.SizeOfOptionalHeader)434 << binary_le(CP.Obj.Header.Characteristics);435 }436 if (CP.isPE()) {437 if (CP.is64Bit()) {438 object::pe32plus_header PEH;439 initializeOptionalHeader(CP, COFF::PE32Header::PE32_PLUS, &PEH);440 OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH));441 } else {442 object::pe32_header PEH;443 uint32_t BaseOfData =444 initializeOptionalHeader(CP, COFF::PE32Header::PE32, &PEH);445 PEH.BaseOfData = BaseOfData;446 OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH));447 }448 for (uint32_t I = 0; I < CP.Obj.OptionalHeader->Header.NumberOfRvaAndSize;449 ++I) {450 const std::optional<COFF::DataDirectory> *DataDirectories =451 CP.Obj.OptionalHeader->DataDirectories;452 uint32_t NumDataDir = std::size(CP.Obj.OptionalHeader->DataDirectories);453 if (I >= NumDataDir || !DataDirectories[I]) {454 OS << zeros(uint32_t(0));455 OS << zeros(uint32_t(0));456 } else {457 OS << binary_le(DataDirectories[I]->RelativeVirtualAddress);458 OS << binary_le(DataDirectories[I]->Size);459 }460 }461 }462 463 assert(OS.tell() == CP.SectionTableStart);464 // Output section table.465 for (const COFFYAML::Section &S : CP.Obj.Sections) {466 OS.write(S.Header.Name, COFF::NameSize);467 OS << binary_le(S.Header.VirtualSize)468 << binary_le(S.Header.VirtualAddress)469 << binary_le(S.Header.SizeOfRawData)470 << binary_le(S.Header.PointerToRawData)471 << binary_le(S.Header.PointerToRelocations)472 << binary_le(S.Header.PointerToLineNumbers)473 << binary_le(S.Header.NumberOfRelocations)474 << binary_le(S.Header.NumberOfLineNumbers)475 << binary_le(S.Header.Characteristics);476 }477 assert(OS.tell() == CP.SectionTableStart + CP.SectionTableSize);478 479 unsigned CurSymbol = 0;480 StringMap<unsigned> SymbolTableIndexMap;481 for (const COFFYAML::Symbol &Sym : CP.Obj.Symbols) {482 SymbolTableIndexMap[Sym.Name] = CurSymbol;483 CurSymbol += 1 + Sym.Header.NumberOfAuxSymbols;484 }485 486 // Output section data.487 for (const COFFYAML::Section &S : CP.Obj.Sections) {488 if (S.Header.SizeOfRawData == 0 || S.Header.PointerToRawData == 0)489 continue;490 assert(S.Header.PointerToRawData >= OS.tell());491 OS.write_zeros(S.Header.PointerToRawData - OS.tell());492 for (auto E : S.StructuredData)493 E.writeAsBinary(OS);494 S.SectionData.writeAsBinary(OS);495 assert(S.Header.SizeOfRawData >= S.SectionData.binary_size());496 OS.write_zeros(S.Header.PointerToRawData + S.Header.SizeOfRawData -497 OS.tell());498 if (S.Header.Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL)499 OS << binary_le<uint32_t>(/*VirtualAddress=*/ S.Relocations.size() + 1)500 << binary_le<uint32_t>(/*SymbolTableIndex=*/ 0)501 << binary_le<uint16_t>(/*Type=*/ 0);502 for (const COFFYAML::Relocation &R : S.Relocations) {503 uint32_t SymbolTableIndex;504 if (R.SymbolTableIndex) {505 if (!R.SymbolName.empty())506 WithColor::error()507 << "Both SymbolName and SymbolTableIndex specified\n";508 SymbolTableIndex = *R.SymbolTableIndex;509 } else {510 SymbolTableIndex = SymbolTableIndexMap[R.SymbolName];511 }512 OS << binary_le(R.VirtualAddress) << binary_le(SymbolTableIndex)513 << binary_le(R.Type);514 }515 }516 517 // Output symbol table.518 519 for (std::vector<COFFYAML::Symbol>::const_iterator i = CP.Obj.Symbols.begin(),520 e = CP.Obj.Symbols.end();521 i != e; ++i) {522 OS.write(i->Header.Name, COFF::NameSize);523 OS << binary_le(i->Header.Value);524 if (CP.useBigObj())525 OS << binary_le(i->Header.SectionNumber);526 else527 OS << binary_le(static_cast<int16_t>(i->Header.SectionNumber));528 OS << binary_le(i->Header.Type) << binary_le(i->Header.StorageClass)529 << binary_le(i->Header.NumberOfAuxSymbols);530 531 if (i->FunctionDefinition) {532 OS << binary_le(i->FunctionDefinition->TagIndex)533 << binary_le(i->FunctionDefinition->TotalSize)534 << binary_le(i->FunctionDefinition->PointerToLinenumber)535 << binary_le(i->FunctionDefinition->PointerToNextFunction)536 << zeros(i->FunctionDefinition->unused);537 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size);538 }539 if (i->bfAndefSymbol) {540 OS << zeros(i->bfAndefSymbol->unused1)541 << binary_le(i->bfAndefSymbol->Linenumber)542 << zeros(i->bfAndefSymbol->unused2)543 << binary_le(i->bfAndefSymbol->PointerToNextFunction)544 << zeros(i->bfAndefSymbol->unused3);545 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size);546 }547 if (i->WeakExternal) {548 OS << binary_le(i->WeakExternal->TagIndex)549 << binary_le(i->WeakExternal->Characteristics)550 << zeros(i->WeakExternal->unused);551 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size);552 }553 if (!i->File.empty()) {554 unsigned SymbolSize = CP.getSymbolSize();555 uint32_t NumberOfAuxRecords =556 (i->File.size() + SymbolSize - 1) / SymbolSize;557 uint32_t NumberOfAuxBytes = NumberOfAuxRecords * SymbolSize;558 uint32_t NumZeros = NumberOfAuxBytes - i->File.size();559 OS.write(i->File.data(), i->File.size());560 OS.write_zeros(NumZeros);561 }562 if (i->SectionDefinition) {563 OS << binary_le(i->SectionDefinition->Length)564 << binary_le(i->SectionDefinition->NumberOfRelocations)565 << binary_le(i->SectionDefinition->NumberOfLinenumbers)566 << binary_le(i->SectionDefinition->CheckSum)567 << binary_le(static_cast<int16_t>(i->SectionDefinition->Number))568 << binary_le(i->SectionDefinition->Selection)569 << zeros(i->SectionDefinition->unused)570 << binary_le(static_cast<int16_t>(i->SectionDefinition->Number >> 16));571 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size);572 }573 if (i->CLRToken) {574 OS << binary_le(i->CLRToken->AuxType) << zeros(i->CLRToken->unused1)575 << binary_le(i->CLRToken->SymbolTableIndex)576 << zeros(i->CLRToken->unused2);577 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size);578 }579 }580 581 // Output string table.582 if (CP.Obj.Header.PointerToSymbolTable)583 OS.write(&CP.StringTable[0], CP.StringTable.size());584 return true;585}586 587size_t COFFYAML::SectionDataEntry::size() const {588 size_t Size = Binary.binary_size();589 if (UInt32)590 Size += sizeof(*UInt32);591 if (LoadConfig32)592 Size += LoadConfig32->Size;593 if (LoadConfig64)594 Size += LoadConfig64->Size;595 return Size;596}597 598template <typename T> static void writeLoadConfig(T &S, raw_ostream &OS) {599 OS.write(reinterpret_cast<const char *>(&S),600 std::min(sizeof(S), static_cast<size_t>(S.Size)));601 if (sizeof(S) < S.Size)602 OS.write_zeros(S.Size - sizeof(S));603}604 605void COFFYAML::SectionDataEntry::writeAsBinary(raw_ostream &OS) const {606 if (UInt32)607 OS << binary_le(*UInt32);608 Binary.writeAsBinary(OS);609 if (LoadConfig32)610 writeLoadConfig(*LoadConfig32, OS);611 if (LoadConfig64)612 writeLoadConfig(*LoadConfig64, OS);613}614 615namespace llvm {616namespace yaml {617 618bool yaml2coff(llvm::COFFYAML::Object &Doc, raw_ostream &Out,619 ErrorHandler ErrHandler) {620 COFFParser CP(Doc, ErrHandler);621 if (!CP.parse()) {622 ErrHandler("failed to parse YAML file");623 return false;624 }625 626 if (!layoutOptionalHeader(CP)) {627 ErrHandler("failed to layout optional header for COFF file");628 return false;629 }630 631 if (!layoutCOFF(CP)) {632 ErrHandler("failed to layout COFF file");633 return false;634 }635 if (!writeCOFF(CP, Out)) {636 ErrHandler("failed to write COFF file");637 return false;638 }639 return true;640}641 642} // namespace yaml643} // namespace llvm644