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//===------ xcoff2yaml.cpp - XCOFF YAMLIO implementation --------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "obj2yaml.h"
#include "llvm/Object/XCOFFObjectFile.h"
#include "llvm/ObjectYAML/XCOFFYAML.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/YAMLTraits.h"
using namespace llvm;
using namespace llvm::object;
namespace {
class XCOFFDumper {
const object::XCOFFObjectFile &Obj;
XCOFFYAML::Object YAMLObj;
void dumpHeader();
Error dumpSections();
Error dumpSymbols();
template <typename Shdr, typename Reloc>
Error dumpSections(ArrayRef<Shdr> Sections);
// Dump auxiliary symbols.
Error dumpFileAuxSym(XCOFFYAML::Symbol &Sym,
const XCOFFSymbolRef &SymbolEntRef);
Error dumpStatAuxSym(XCOFFYAML::Symbol &Sym,
const XCOFFSymbolRef &SymbolEntRef);
Error dumpBlockAuxSym(XCOFFYAML::Symbol &Sym,
const XCOFFSymbolRef &SymbolEntRef);
Error dumpDwarfAuxSym(XCOFFYAML::Symbol &Sym,
const XCOFFSymbolRef &SymbolEntRef);
Error dumpAuxSyms(XCOFFYAML::Symbol &Sym, const XCOFFSymbolRef &SymbolEntRef);
void dumpFuncAuxSym(XCOFFYAML::Symbol &Sym, const uintptr_t AuxAddress);
void dumpExpAuxSym(XCOFFYAML::Symbol &Sym, const uintptr_t AuxAddress);
void dumpCsectAuxSym(XCOFFYAML::Symbol &Sym,
const object::XCOFFCsectAuxRef &AuxEntPtr);
public:
XCOFFDumper(const object::XCOFFObjectFile &obj) : Obj(obj) {}
Error dump();
XCOFFYAML::Object &getYAMLObj() { return YAMLObj; }
template <typename T> const T *getAuxEntPtr(uintptr_t AuxAddress) {
Obj.checkSymbolEntryPointer(AuxAddress);
return reinterpret_cast<const T *>(AuxAddress);
}
};
} // namespace
Error XCOFFDumper::dump() {
dumpHeader();
if (Error E = dumpSections())
return E;
return dumpSymbols();
}
void XCOFFDumper::dumpHeader() {
YAMLObj.Header.Magic = Obj.getMagic();
YAMLObj.Header.NumberOfSections = Obj.getNumberOfSections();
YAMLObj.Header.TimeStamp = Obj.getTimeStamp();
YAMLObj.Header.SymbolTableOffset = Obj.is64Bit()
? Obj.getSymbolTableOffset64()
: Obj.getSymbolTableOffset32();
YAMLObj.Header.NumberOfSymTableEntries =
Obj.is64Bit() ? Obj.getNumberOfSymbolTableEntries64()
: Obj.getRawNumberOfSymbolTableEntries32();
YAMLObj.Header.AuxHeaderSize = Obj.getOptionalHeaderSize();
YAMLObj.Header.Flags = Obj.getFlags();
}
Error XCOFFDumper::dumpSections() {
if (Obj.is64Bit())
return dumpSections<XCOFFSectionHeader64, XCOFFRelocation64>(
Obj.sections64());
return dumpSections<XCOFFSectionHeader32, XCOFFRelocation32>(
Obj.sections32());
}
template <typename Shdr, typename Reloc>
Error XCOFFDumper::dumpSections(ArrayRef<Shdr> Sections) {
std::vector<XCOFFYAML::Section> &YamlSections = YAMLObj.Sections;
for (const Shdr &S : Sections) {
XCOFFYAML::Section YamlSec;
YamlSec.SectionName = S.getName();
YamlSec.Address = S.PhysicalAddress;
YamlSec.Size = S.SectionSize;
YamlSec.NumberOfRelocations = S.NumberOfRelocations;
YamlSec.NumberOfLineNumbers = S.NumberOfLineNumbers;
YamlSec.FileOffsetToData = S.FileOffsetToRawData;
YamlSec.FileOffsetToRelocations = S.FileOffsetToRelocationInfo;
YamlSec.FileOffsetToLineNumbers = S.FileOffsetToLineNumberInfo;
YamlSec.Flags = S.Flags;
// Dump section data.
if (S.FileOffsetToRawData) {
DataRefImpl SectionDRI;
SectionDRI.p = reinterpret_cast<uintptr_t>(&S);
Expected<ArrayRef<uint8_t>> SecDataRefOrErr =
Obj.getSectionContents(SectionDRI);
if (!SecDataRefOrErr)
return SecDataRefOrErr.takeError();
YamlSec.SectionData = SecDataRefOrErr.get();
}
// Dump relocations.
if (S.NumberOfRelocations) {
auto RelRefOrErr = Obj.relocations<Shdr, Reloc>(S);
if (!RelRefOrErr)
return RelRefOrErr.takeError();
for (const Reloc &R : RelRefOrErr.get()) {
XCOFFYAML::Relocation YamlRel;
YamlRel.Type = R.Type;
YamlRel.Info = R.Info;
YamlRel.SymbolIndex = R.SymbolIndex;
YamlRel.VirtualAddress = R.VirtualAddress;
YamlSec.Relocations.push_back(YamlRel);
}
}
YamlSections.push_back(YamlSec);
}
return Error::success();
}
Error XCOFFDumper::dumpFileAuxSym(XCOFFYAML::Symbol &Sym,
const XCOFFSymbolRef &SymbolEntRef) {
for (uint8_t I = 1; I <= Sym.NumberOfAuxEntries; ++I) {
uintptr_t AuxAddress = XCOFFObjectFile::getAdvancedSymbolEntryAddress(
SymbolEntRef.getEntryAddress(), I);
const XCOFFFileAuxEnt *FileAuxEntPtr =
getAuxEntPtr<XCOFFFileAuxEnt>(AuxAddress);
auto FileNameOrError = Obj.getCFileName(FileAuxEntPtr);
if (!FileNameOrError)
return FileNameOrError.takeError();
XCOFFYAML::FileAuxEnt FileAuxSym;
FileAuxSym.FileNameOrString = FileNameOrError.get();
FileAuxSym.FileStringType = FileAuxEntPtr->Type;
Sym.AuxEntries.push_back(
std::make_unique<XCOFFYAML::FileAuxEnt>(FileAuxSym));
}
return Error::success();
}
Error XCOFFDumper::dumpStatAuxSym(XCOFFYAML::Symbol &Sym,
const XCOFFSymbolRef &SymbolEntRef) {
if (Sym.NumberOfAuxEntries != 1) {
uint32_t SymbolIndex = Obj.getSymbolIndex(SymbolEntRef.getEntryAddress());
return createError("failed to parse symbol \"" + Sym.SymbolName +
"\" with index of " + Twine(SymbolIndex) +
": expected 1 aux symbol for C_STAT, while got " +
Twine(static_cast<uint32_t>(*Sym.NumberOfAuxEntries)));
}
const XCOFFSectAuxEntForStat *AuxEntPtr =
getAuxEntPtr<XCOFFSectAuxEntForStat>(
XCOFFObjectFile::getAdvancedSymbolEntryAddress(
SymbolEntRef.getEntryAddress(), 1));
XCOFFYAML::SectAuxEntForStat StatAuxSym;
StatAuxSym.SectionLength = AuxEntPtr->SectionLength;
StatAuxSym.NumberOfLineNum = AuxEntPtr->NumberOfLineNum;
StatAuxSym.NumberOfRelocEnt = AuxEntPtr->NumberOfRelocEnt;
Sym.AuxEntries.push_back(
std::make_unique<XCOFFYAML::SectAuxEntForStat>(StatAuxSym));
return Error::success();
}
void XCOFFDumper::dumpFuncAuxSym(XCOFFYAML::Symbol &Sym,
const uintptr_t AuxAddress) {
XCOFFYAML::FunctionAuxEnt FunAuxSym;
if (Obj.is64Bit()) {
const XCOFFFunctionAuxEnt64 *AuxEntPtr =
getAuxEntPtr<XCOFFFunctionAuxEnt64>(AuxAddress);
FunAuxSym.PtrToLineNum = AuxEntPtr->PtrToLineNum;
FunAuxSym.SizeOfFunction = AuxEntPtr->SizeOfFunction;
FunAuxSym.SymIdxOfNextBeyond = AuxEntPtr->SymIdxOfNextBeyond;
} else {
const XCOFFFunctionAuxEnt32 *AuxEntPtr =
getAuxEntPtr<XCOFFFunctionAuxEnt32>(AuxAddress);
FunAuxSym.OffsetToExceptionTbl = AuxEntPtr->OffsetToExceptionTbl;
FunAuxSym.PtrToLineNum = AuxEntPtr->PtrToLineNum;
FunAuxSym.SizeOfFunction = AuxEntPtr->SizeOfFunction;
FunAuxSym.SymIdxOfNextBeyond = AuxEntPtr->SymIdxOfNextBeyond;
}
Sym.AuxEntries.push_back(
std::make_unique<XCOFFYAML::FunctionAuxEnt>(FunAuxSym));
}
void XCOFFDumper::dumpExpAuxSym(XCOFFYAML::Symbol &Sym,
const uintptr_t AuxAddress) {
const XCOFFExceptionAuxEnt *AuxEntPtr =
getAuxEntPtr<XCOFFExceptionAuxEnt>(AuxAddress);
XCOFFYAML::ExcpetionAuxEnt ExceptAuxSym;
ExceptAuxSym.OffsetToExceptionTbl = AuxEntPtr->OffsetToExceptionTbl;
ExceptAuxSym.SizeOfFunction = AuxEntPtr->SizeOfFunction;
ExceptAuxSym.SymIdxOfNextBeyond = AuxEntPtr->SymIdxOfNextBeyond;
Sym.AuxEntries.push_back(
std::make_unique<XCOFFYAML::ExcpetionAuxEnt>(ExceptAuxSym));
}
void XCOFFDumper::dumpCsectAuxSym(XCOFFYAML::Symbol &Sym,
const object::XCOFFCsectAuxRef &AuxEntPtr) {
XCOFFYAML::CsectAuxEnt CsectAuxSym;
CsectAuxSym.ParameterHashIndex = AuxEntPtr.getParameterHashIndex();
CsectAuxSym.TypeChkSectNum = AuxEntPtr.getTypeChkSectNum();
CsectAuxSym.SymbolAlignmentAndType = AuxEntPtr.getSymbolAlignmentAndType();
CsectAuxSym.StorageMappingClass = AuxEntPtr.getStorageMappingClass();
if (Obj.is64Bit()) {
CsectAuxSym.SectionOrLengthLo =
static_cast<uint32_t>(AuxEntPtr.getSectionOrLength64());
CsectAuxSym.SectionOrLengthHi =
static_cast<uint32_t>(AuxEntPtr.getSectionOrLength64() >> 32);
} else {
CsectAuxSym.SectionOrLength = AuxEntPtr.getSectionOrLength32();
CsectAuxSym.StabInfoIndex = AuxEntPtr.getStabInfoIndex32();
CsectAuxSym.StabSectNum = AuxEntPtr.getStabSectNum32();
}
Sym.AuxEntries.push_back(
std::make_unique<XCOFFYAML::CsectAuxEnt>(CsectAuxSym));
}
Error XCOFFDumper::dumpAuxSyms(XCOFFYAML::Symbol &Sym,
const XCOFFSymbolRef &SymbolEntRef) {
auto ErrOrCsectAuxRef = SymbolEntRef.getXCOFFCsectAuxRef();
if (!ErrOrCsectAuxRef)
return ErrOrCsectAuxRef.takeError();
XCOFFCsectAuxRef CsectAuxRef = ErrOrCsectAuxRef.get();
for (uint8_t I = 1; I <= Sym.NumberOfAuxEntries; ++I) {
if (I == Sym.NumberOfAuxEntries && !Obj.is64Bit()) {
dumpCsectAuxSym(Sym, CsectAuxRef);
return Error::success();
}
uintptr_t AuxAddress = XCOFFObjectFile::getAdvancedSymbolEntryAddress(
SymbolEntRef.getEntryAddress(), I);
if (Obj.is64Bit()) {
XCOFF::SymbolAuxType Type = *Obj.getSymbolAuxType(AuxAddress);
if (Type == XCOFF::SymbolAuxType::AUX_CSECT)
dumpCsectAuxSym(Sym, CsectAuxRef);
else if (Type == XCOFF::SymbolAuxType::AUX_FCN)
dumpFuncAuxSym(Sym, AuxAddress);
else if (Type == XCOFF::SymbolAuxType::AUX_EXCEPT)
dumpExpAuxSym(Sym, AuxAddress);
else {
uint32_t SymbolIndex =
Obj.getSymbolIndex(SymbolEntRef.getEntryAddress());
return createError("failed to parse symbol \"" + Sym.SymbolName +
"\" with index of " + Twine(SymbolIndex) +
": invalid auxiliary symbol type: " +
Twine(static_cast<uint32_t>(Type)));
}
} else
dumpFuncAuxSym(Sym, AuxAddress);
}
return Error::success();
}
Error XCOFFDumper::dumpBlockAuxSym(XCOFFYAML::Symbol &Sym,
const XCOFFSymbolRef &SymbolEntRef) {
if (Sym.NumberOfAuxEntries != 1) {
uint32_t SymbolIndex = Obj.getSymbolIndex(SymbolEntRef.getEntryAddress());
return createError(
"failed to parse symbol \"" + Sym.SymbolName + "\" with index of " +
Twine(SymbolIndex) +
": expected 1 aux symbol for C_BLOCK or C_FCN, while got " +
Twine(static_cast<uint32_t>(*Sym.NumberOfAuxEntries)));
}
uintptr_t AuxAddress = XCOFFObjectFile::getAdvancedSymbolEntryAddress(
SymbolEntRef.getEntryAddress(), 1);
XCOFFYAML::BlockAuxEnt BlockAuxSym;
if (Obj.is64Bit()) {
const XCOFFBlockAuxEnt64 *AuxEntPtr =
getAuxEntPtr<XCOFFBlockAuxEnt64>(AuxAddress);
BlockAuxSym.LineNum = AuxEntPtr->LineNum;
} else {
const XCOFFBlockAuxEnt32 *AuxEntPtr =
getAuxEntPtr<XCOFFBlockAuxEnt32>(AuxAddress);
BlockAuxSym.LineNumLo = AuxEntPtr->LineNumLo;
BlockAuxSym.LineNumHi = AuxEntPtr->LineNumHi;
}
Sym.AuxEntries.push_back(
std::make_unique<XCOFFYAML::BlockAuxEnt>(BlockAuxSym));
return Error::success();
}
Error XCOFFDumper::dumpDwarfAuxSym(XCOFFYAML::Symbol &Sym,
const XCOFFSymbolRef &SymbolEntRef) {
if (Sym.NumberOfAuxEntries != 1) {
uint32_t SymbolIndex = Obj.getSymbolIndex(SymbolEntRef.getEntryAddress());
return createError("failed to parse symbol \"" + Sym.SymbolName +
"\" with index of " + Twine(SymbolIndex) +
": expected 1 aux symbol for C_DWARF, while got " +
Twine(static_cast<uint32_t>(*Sym.NumberOfAuxEntries)));
}
uintptr_t AuxAddress = XCOFFObjectFile::getAdvancedSymbolEntryAddress(
SymbolEntRef.getEntryAddress(), 1);
XCOFFYAML::SectAuxEntForDWARF DwarfAuxSym;
if (Obj.is64Bit()) {
const XCOFFSectAuxEntForDWARF64 *AuxEntPtr =
getAuxEntPtr<XCOFFSectAuxEntForDWARF64>(AuxAddress);
DwarfAuxSym.LengthOfSectionPortion = AuxEntPtr->LengthOfSectionPortion;
DwarfAuxSym.NumberOfRelocEnt = AuxEntPtr->NumberOfRelocEnt;
} else {
const XCOFFSectAuxEntForDWARF32 *AuxEntPtr =
getAuxEntPtr<XCOFFSectAuxEntForDWARF32>(AuxAddress);
DwarfAuxSym.LengthOfSectionPortion = AuxEntPtr->LengthOfSectionPortion;
DwarfAuxSym.NumberOfRelocEnt = AuxEntPtr->NumberOfRelocEnt;
}
Sym.AuxEntries.push_back(
std::make_unique<XCOFFYAML::SectAuxEntForDWARF>(DwarfAuxSym));
return Error::success();
}
Error XCOFFDumper::dumpSymbols() {
std::vector<XCOFFYAML::Symbol> &Symbols = YAMLObj.Symbols;
for (const SymbolRef &S : Obj.symbols()) {
DataRefImpl SymbolDRI = S.getRawDataRefImpl();
const XCOFFSymbolRef SymbolEntRef = Obj.toSymbolRef(SymbolDRI);
XCOFFYAML::Symbol Sym;
Expected<StringRef> SymNameRefOrErr = Obj.getSymbolName(SymbolDRI);
if (!SymNameRefOrErr) {
return SymNameRefOrErr.takeError();
}
Sym.SymbolName = SymNameRefOrErr.get();
Sym.Value = SymbolEntRef.getValue();
Expected<StringRef> SectionNameRefOrErr =
Obj.getSymbolSectionName(SymbolEntRef);
if (!SectionNameRefOrErr)
return SectionNameRefOrErr.takeError();
Sym.SectionName = SectionNameRefOrErr.get();
Sym.Type = SymbolEntRef.getSymbolType();
Sym.StorageClass = SymbolEntRef.getStorageClass();
Sym.NumberOfAuxEntries = SymbolEntRef.getNumberOfAuxEntries();
if (Sym.NumberOfAuxEntries) {
switch (Sym.StorageClass) {
case XCOFF::C_FILE:
if (Error E = dumpFileAuxSym(Sym, SymbolEntRef))
return E;
break;
case XCOFF::C_STAT:
if (Error E = dumpStatAuxSym(Sym, SymbolEntRef))
return E;
break;
case XCOFF::C_EXT:
case XCOFF::C_WEAKEXT:
case XCOFF::C_HIDEXT:
if (Error E = dumpAuxSyms(Sym, SymbolEntRef))
return E;
break;
case XCOFF::C_BLOCK:
case XCOFF::C_FCN:
if (Error E = dumpBlockAuxSym(Sym, SymbolEntRef))
return E;
break;
case XCOFF::C_DWARF:
if (Error E = dumpDwarfAuxSym(Sym, SymbolEntRef))
return E;
break;
default:
break;
}
}
Symbols.push_back(std::move(Sym));
}
return Error::success();
}
Error xcoff2yaml(raw_ostream &Out, const object::XCOFFObjectFile &Obj) {
XCOFFDumper Dumper(Obj);
if (Error E = Dumper.dump())
return E;
yaml::Output Yout(Out);
Yout << Dumper.getYAMLObj();
return Error::success();
}
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