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//===------ utils/obj2yaml.cpp - obj2yaml conversion tool -------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "obj2yaml.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/COFFYAML.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/YAMLTraits.h"
using namespace llvm;
namespace {
class COFFDumper {
const object::COFFObjectFile &Obj;
COFFYAML::Object YAMLObj;
void dumpHeader(const object::coff_file_header *Header);
void dumpSections(unsigned numSections);
void dumpSymbols(unsigned numSymbols);
public:
COFFDumper(const object::COFFObjectFile &Obj);
COFFYAML::Object &getYAMLObj();
};
}
static void check(error_code ec) {
if (ec)
report_fatal_error(ec.message());
}
COFFDumper::COFFDumper(const object::COFFObjectFile &Obj) : Obj(Obj) {
const object::coff_file_header *Header;
check(Obj.getCOFFHeader(Header));
dumpHeader(Header);
dumpSections(Header->NumberOfSections);
dumpSymbols(Header->NumberOfSymbols);
}
void COFFDumper::dumpHeader(const object::coff_file_header *Header) {
YAMLObj.Header.Machine = Header->Machine;
YAMLObj.Header.Characteristics = Header->Characteristics;
}
void COFFDumper::dumpSections(unsigned NumSections) {
std::vector<COFFYAML::Section> &Sections = YAMLObj.Sections;
for (const auto &Section : Obj.sections()) {
const object::coff_section *Sect = Obj.getCOFFSection(Section);
COFFYAML::Section Sec;
Sec.Name = Sect->Name; // FIXME: check the null termination!
uint32_t Characteristics = Sect->Characteristics;
Sec.Header.Characteristics = Characteristics;
Sec.Alignment = 1 << (((Characteristics >> 20) & 0xf) - 1);
ArrayRef<uint8_t> sectionData;
Obj.getSectionContents(Sect, sectionData);
Sec.SectionData = object::yaml::BinaryRef(sectionData);
std::vector<COFFYAML::Relocation> Relocations;
for (const auto &Reloc : Section.relocations()) {
const object::coff_relocation *reloc = Obj.getCOFFRelocation(Reloc);
COFFYAML::Relocation Rel;
object::symbol_iterator Sym = Reloc.getSymbol();
Sym->getName(Rel.SymbolName);
Rel.VirtualAddress = reloc->VirtualAddress;
Rel.Type = reloc->Type;
Relocations.push_back(Rel);
}
Sec.Relocations = Relocations;
Sections.push_back(Sec);
}
}
static void
dumpFunctionDefinition(COFFYAML::Symbol *Sym,
const object::coff_aux_function_definition *ObjFD) {
COFF::AuxiliaryFunctionDefinition YAMLFD;
YAMLFD.TagIndex = ObjFD->TagIndex;
YAMLFD.TotalSize = ObjFD->TotalSize;
YAMLFD.PointerToLinenumber = ObjFD->PointerToLinenumber;
YAMLFD.PointerToNextFunction = ObjFD->PointerToNextFunction;
Sym->FunctionDefinition = YAMLFD;
}
static void
dumpbfAndEfLineInfo(COFFYAML::Symbol *Sym,
const object::coff_aux_bf_and_ef_symbol *ObjBES) {
COFF::AuxiliarybfAndefSymbol YAMLAAS;
YAMLAAS.Linenumber = ObjBES->Linenumber;
YAMLAAS.PointerToNextFunction = ObjBES->PointerToNextFunction;
Sym->bfAndefSymbol = YAMLAAS;
}
static void dumpWeakExternal(COFFYAML::Symbol *Sym,
const object::coff_aux_weak_external *ObjWE) {
COFF::AuxiliaryWeakExternal YAMLWE;
YAMLWE.TagIndex = ObjWE->TagIndex;
YAMLWE.Characteristics = ObjWE->Characteristics;
Sym->WeakExternal = YAMLWE;
}
static void
dumpSectionDefinition(COFFYAML::Symbol *Sym,
const object::coff_aux_section_definition *ObjSD) {
COFF::AuxiliarySectionDefinition YAMLASD;
YAMLASD.Length = ObjSD->Length;
YAMLASD.NumberOfRelocations = ObjSD->NumberOfRelocations;
YAMLASD.NumberOfLinenumbers = ObjSD->NumberOfLinenumbers;
YAMLASD.CheckSum = ObjSD->CheckSum;
YAMLASD.Number = ObjSD->Number;
YAMLASD.Selection = ObjSD->Selection;
Sym->SectionDefinition = YAMLASD;
}
static void
dumpCLRTokenDefinition(COFFYAML::Symbol *Sym,
const object::coff_aux_clr_token *ObjCLRToken) {
COFF::AuxiliaryCLRToken YAMLCLRToken;
YAMLCLRToken.AuxType = ObjCLRToken->AuxType;
YAMLCLRToken.SymbolTableIndex = ObjCLRToken->SymbolTableIndex;
Sym->CLRToken = YAMLCLRToken;
}
void COFFDumper::dumpSymbols(unsigned NumSymbols) {
std::vector<COFFYAML::Symbol> &Symbols = YAMLObj.Symbols;
for (const auto &S : Obj.symbols()) {
const object::coff_symbol *Symbol = Obj.getCOFFSymbol(S);
COFFYAML::Symbol Sym;
Obj.getSymbolName(Symbol, Sym.Name);
Sym.SimpleType = COFF::SymbolBaseType(Symbol->getBaseType());
Sym.ComplexType = COFF::SymbolComplexType(Symbol->getComplexType());
Sym.Header.StorageClass = Symbol->StorageClass;
Sym.Header.Value = Symbol->Value;
Sym.Header.SectionNumber = Symbol->SectionNumber;
Sym.Header.NumberOfAuxSymbols = Symbol->NumberOfAuxSymbols;
if (Symbol->NumberOfAuxSymbols > 0) {
ArrayRef<uint8_t> AuxData = Obj.getSymbolAuxData(Symbol);
if (Symbol->isFunctionDefinition()) {
// This symbol represents a function definition.
assert(Symbol->NumberOfAuxSymbols == 1 &&
"Expected a single aux symbol to describe this function!");
const object::coff_aux_function_definition *ObjFD =
reinterpret_cast<const object::coff_aux_function_definition *>(
AuxData.data());
dumpFunctionDefinition(&Sym, ObjFD);
} else if (Symbol->isFunctionLineInfo()) {
// This symbol describes function line number information.
assert(Symbol->NumberOfAuxSymbols == 1 &&
"Exepected a single aux symbol to describe this section!");
const object::coff_aux_bf_and_ef_symbol *ObjBES =
reinterpret_cast<const object::coff_aux_bf_and_ef_symbol *>(
AuxData.data());
dumpbfAndEfLineInfo(&Sym, ObjBES);
} else if (Symbol->isWeakExternal()) {
// This symbol represents a weak external definition.
assert(Symbol->NumberOfAuxSymbols == 1 &&
"Exepected a single aux symbol to describe this section!");
const object::coff_aux_weak_external *ObjWE =
reinterpret_cast<const object::coff_aux_weak_external *>(
AuxData.data());
dumpWeakExternal(&Sym, ObjWE);
} else if (Symbol->isFileRecord()) {
// This symbol represents a file record.
Sym.File = StringRef(reinterpret_cast<const char *>(AuxData.data()),
Symbol->NumberOfAuxSymbols * COFF::SymbolSize)
.rtrim(StringRef("\0", /*length=*/1));
} else if (Symbol->isSectionDefinition()) {
// This symbol represents a section definition.
assert(Symbol->NumberOfAuxSymbols == 1 &&
"Expected a single aux symbol to describe this section!");
const object::coff_aux_section_definition *ObjSD =
reinterpret_cast<const object::coff_aux_section_definition *>(
AuxData.data());
dumpSectionDefinition(&Sym, ObjSD);
} else if (Symbol->isCLRToken()) {
// This symbol represents a CLR token definition.
assert(Symbol->NumberOfAuxSymbols == 1 &&
"Expected a single aux symbol to describe this CLR Token");
const object::coff_aux_clr_token *ObjCLRToken =
reinterpret_cast<const object::coff_aux_clr_token *>(
AuxData.data());
dumpCLRTokenDefinition(&Sym, ObjCLRToken);
} else {
llvm_unreachable("Unhandled auxiliary symbol!");
}
}
Symbols.push_back(Sym);
}
}
COFFYAML::Object &COFFDumper::getYAMLObj() {
return YAMLObj;
}
error_code coff2yaml(raw_ostream &Out, MemoryBuffer *Buff) {
error_code ec;
object::COFFObjectFile Obj(Buff, ec);
check(ec);
COFFDumper Dumper(Obj);
yaml::Output Yout(Out);
Yout << Dumper.getYAMLObj();
return object::object_error::success;
}