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