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Do a better job classifying symbols. This increases the consistency between the COFF handling code and the ELF side of things. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220952 91177308-0d34-0410-b5e6-96231b3b80d8
217 lines
7.6 KiB
C++
217 lines
7.6 KiB
C++
//===------ utils/obj2yaml.cpp - obj2yaml conversion tool -------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "obj2yaml.h"
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#include "llvm/Object/COFF.h"
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#include "llvm/Object/COFFYAML.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/YAMLTraits.h"
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using namespace llvm;
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namespace {
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class COFFDumper {
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const object::COFFObjectFile &Obj;
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COFFYAML::Object YAMLObj;
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void dumpHeader();
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void dumpSections(unsigned numSections);
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void dumpSymbols(unsigned numSymbols);
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public:
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COFFDumper(const object::COFFObjectFile &Obj);
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COFFYAML::Object &getYAMLObj();
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};
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}
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COFFDumper::COFFDumper(const object::COFFObjectFile &Obj) : Obj(Obj) {
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dumpHeader();
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dumpSections(Obj.getNumberOfSections());
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dumpSymbols(Obj.getNumberOfSymbols());
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}
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void COFFDumper::dumpHeader() {
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YAMLObj.Header.Machine = Obj.getMachine();
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YAMLObj.Header.Characteristics = Obj.getCharacteristics();
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}
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void COFFDumper::dumpSections(unsigned NumSections) {
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std::vector<COFFYAML::Section> &Sections = YAMLObj.Sections;
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for (const auto &Section : Obj.sections()) {
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const object::coff_section *Sect = Obj.getCOFFSection(Section);
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COFFYAML::Section Sec;
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Section.getName(Sec.Name);
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Sec.Header.Characteristics = Sect->Characteristics;
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Sec.Alignment = Section.getAlignment();
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ArrayRef<uint8_t> sectionData;
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if (!Section.isBSS())
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Obj.getSectionContents(Sect, sectionData);
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Sec.SectionData = yaml::BinaryRef(sectionData);
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std::vector<COFFYAML::Relocation> Relocations;
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for (const auto &Reloc : Section.relocations()) {
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const object::coff_relocation *reloc = Obj.getCOFFRelocation(Reloc);
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COFFYAML::Relocation Rel;
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object::symbol_iterator Sym = Reloc.getSymbol();
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Sym->getName(Rel.SymbolName);
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Rel.VirtualAddress = reloc->VirtualAddress;
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Rel.Type = reloc->Type;
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Relocations.push_back(Rel);
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}
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Sec.Relocations = Relocations;
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Sections.push_back(Sec);
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}
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}
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static void
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dumpFunctionDefinition(COFFYAML::Symbol *Sym,
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const object::coff_aux_function_definition *ObjFD) {
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COFF::AuxiliaryFunctionDefinition YAMLFD;
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YAMLFD.TagIndex = ObjFD->TagIndex;
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YAMLFD.TotalSize = ObjFD->TotalSize;
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YAMLFD.PointerToLinenumber = ObjFD->PointerToLinenumber;
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YAMLFD.PointerToNextFunction = ObjFD->PointerToNextFunction;
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Sym->FunctionDefinition = YAMLFD;
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}
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static void
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dumpbfAndEfLineInfo(COFFYAML::Symbol *Sym,
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const object::coff_aux_bf_and_ef_symbol *ObjBES) {
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COFF::AuxiliarybfAndefSymbol YAMLAAS;
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YAMLAAS.Linenumber = ObjBES->Linenumber;
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YAMLAAS.PointerToNextFunction = ObjBES->PointerToNextFunction;
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Sym->bfAndefSymbol = YAMLAAS;
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}
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static void dumpWeakExternal(COFFYAML::Symbol *Sym,
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const object::coff_aux_weak_external *ObjWE) {
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COFF::AuxiliaryWeakExternal YAMLWE;
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YAMLWE.TagIndex = ObjWE->TagIndex;
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YAMLWE.Characteristics = ObjWE->Characteristics;
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Sym->WeakExternal = YAMLWE;
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}
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static void
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dumpSectionDefinition(COFFYAML::Symbol *Sym,
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const object::coff_aux_section_definition *ObjSD,
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bool IsBigObj) {
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COFF::AuxiliarySectionDefinition YAMLASD;
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int32_t AuxNumber = ObjSD->getNumber(IsBigObj);
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YAMLASD.Length = ObjSD->Length;
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YAMLASD.NumberOfRelocations = ObjSD->NumberOfRelocations;
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YAMLASD.NumberOfLinenumbers = ObjSD->NumberOfLinenumbers;
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YAMLASD.CheckSum = ObjSD->CheckSum;
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YAMLASD.Number = AuxNumber;
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YAMLASD.Selection = ObjSD->Selection;
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Sym->SectionDefinition = YAMLASD;
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}
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static void
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dumpCLRTokenDefinition(COFFYAML::Symbol *Sym,
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const object::coff_aux_clr_token *ObjCLRToken) {
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COFF::AuxiliaryCLRToken YAMLCLRToken;
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YAMLCLRToken.AuxType = ObjCLRToken->AuxType;
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YAMLCLRToken.SymbolTableIndex = ObjCLRToken->SymbolTableIndex;
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Sym->CLRToken = YAMLCLRToken;
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}
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void COFFDumper::dumpSymbols(unsigned NumSymbols) {
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std::vector<COFFYAML::Symbol> &Symbols = YAMLObj.Symbols;
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for (const auto &S : Obj.symbols()) {
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object::COFFSymbolRef Symbol = Obj.getCOFFSymbol(S);
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COFFYAML::Symbol Sym;
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Obj.getSymbolName(Symbol, Sym.Name);
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Sym.SimpleType = COFF::SymbolBaseType(Symbol.getBaseType());
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Sym.ComplexType = COFF::SymbolComplexType(Symbol.getComplexType());
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Sym.Header.StorageClass = Symbol.getStorageClass();
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Sym.Header.Value = Symbol.getValue();
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Sym.Header.SectionNumber = Symbol.getSectionNumber();
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Sym.Header.NumberOfAuxSymbols = Symbol.getNumberOfAuxSymbols();
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if (Symbol.getNumberOfAuxSymbols() > 0) {
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ArrayRef<uint8_t> AuxData = Obj.getSymbolAuxData(Symbol);
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if (Symbol.isFunctionDefinition()) {
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// This symbol represents a function definition.
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assert(Symbol.getNumberOfAuxSymbols() == 1 &&
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"Expected a single aux symbol to describe this function!");
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const object::coff_aux_function_definition *ObjFD =
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reinterpret_cast<const object::coff_aux_function_definition *>(
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AuxData.data());
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dumpFunctionDefinition(&Sym, ObjFD);
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} else if (Symbol.isFunctionLineInfo()) {
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// This symbol describes function line number information.
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assert(Symbol.getNumberOfAuxSymbols() == 1 &&
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"Expected a single aux symbol to describe this function!");
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const object::coff_aux_bf_and_ef_symbol *ObjBES =
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reinterpret_cast<const object::coff_aux_bf_and_ef_symbol *>(
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AuxData.data());
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dumpbfAndEfLineInfo(&Sym, ObjBES);
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} else if (Symbol.isAnyUndefined()) {
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// This symbol represents a weak external definition.
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assert(Symbol.getNumberOfAuxSymbols() == 1 &&
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"Expected a single aux symbol to describe this weak symbol!");
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const object::coff_aux_weak_external *ObjWE =
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reinterpret_cast<const object::coff_aux_weak_external *>(
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AuxData.data());
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dumpWeakExternal(&Sym, ObjWE);
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} else if (Symbol.isFileRecord()) {
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// This symbol represents a file record.
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Sym.File = StringRef(reinterpret_cast<const char *>(AuxData.data()),
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Symbol.getNumberOfAuxSymbols() *
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Obj.getSymbolTableEntrySize())
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.rtrim(StringRef("\0", /*length=*/1));
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} else if (Symbol.isSectionDefinition()) {
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// This symbol represents a section definition.
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assert(Symbol.getNumberOfAuxSymbols() == 1 &&
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"Expected a single aux symbol to describe this section!");
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const object::coff_aux_section_definition *ObjSD =
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reinterpret_cast<const object::coff_aux_section_definition *>(
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AuxData.data());
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dumpSectionDefinition(&Sym, ObjSD, Symbol.isBigObj());
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} else if (Symbol.isCLRToken()) {
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// This symbol represents a CLR token definition.
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assert(Symbol.getNumberOfAuxSymbols() == 1 &&
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"Expected a single aux symbol to describe this CLR Token!");
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const object::coff_aux_clr_token *ObjCLRToken =
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reinterpret_cast<const object::coff_aux_clr_token *>(
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AuxData.data());
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dumpCLRTokenDefinition(&Sym, ObjCLRToken);
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} else {
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llvm_unreachable("Unhandled auxiliary symbol!");
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}
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}
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Symbols.push_back(Sym);
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}
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}
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COFFYAML::Object &COFFDumper::getYAMLObj() {
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return YAMLObj;
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}
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std::error_code coff2yaml(raw_ostream &Out, const object::COFFObjectFile &Obj) {
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COFFDumper Dumper(Obj);
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yaml::Output Yout(Out);
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Yout << Dumper.getYAMLObj();
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return object::object_error::success;
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}
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