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//===- ELFObjectFile.h - ELF object file 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
//
//===----------------------------------------------------------------------===//
//
// This file declares the ELFObjectFile template class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_OBJECT_ELFOBJECTFILE_H
#define LLVM_OBJECT_ELFOBJECTFILE_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/Object/Binary.h"
#include "llvm/Object/ELF.h"
#include "llvm/Object/ELFTypes.h"
#include "llvm/Object/Error.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/SymbolicFile.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ELFAttributeParser.h"
#include "llvm/Support/ELFAttributes.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/MemoryBufferRef.h"
#include "llvm/Support/ScopedPrinter.h"
#include "llvm/TargetParser/SubtargetFeature.h"
#include "llvm/TargetParser/Triple.h"
#include <cassert>
#include <cstdint>
namespace llvm {
template <typename T> class SmallVectorImpl;
namespace object {
constexpr int NumElfSymbolTypes = 16;
extern const llvm::EnumEntry<unsigned> ElfSymbolTypes[NumElfSymbolTypes];
class elf_symbol_iterator;
struct ELFPltEntry {
StringRef Section;
std::optional<DataRefImpl> Symbol;
uint64_t Address;
};
class ELFObjectFileBase : public ObjectFile {
friend class ELFRelocationRef;
friend class ELFSectionRef;
friend class ELFSymbolRef;
SubtargetFeatures getMIPSFeatures() const;
SubtargetFeatures getARMFeatures() const;
SubtargetFeatures getHexagonFeatures() const;
Expected<SubtargetFeatures> getRISCVFeatures() const;
SubtargetFeatures getLoongArchFeatures() const;
StringRef getAMDGPUCPUName() const;
StringRef getNVPTXCPUName() const;
protected:
ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source);
virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0;
virtual uint8_t getSymbolBinding(DataRefImpl Symb) const = 0;
virtual uint8_t getSymbolOther(DataRefImpl Symb) const = 0;
virtual uint8_t getSymbolELFType(DataRefImpl Symb) const = 0;
virtual uint32_t getSectionType(DataRefImpl Sec) const = 0;
virtual uint64_t getSectionFlags(DataRefImpl Sec) const = 0;
virtual uint64_t getSectionOffset(DataRefImpl Sec) const = 0;
virtual Expected<int64_t> getRelocationAddend(DataRefImpl Rel) const = 0;
virtual Error getBuildAttributes(ELFAttributeParser &Attributes) const = 0;
public:
using elf_symbol_iterator_range = iterator_range<elf_symbol_iterator>;
virtual elf_symbol_iterator_range getDynamicSymbolIterators() const = 0;
/// Returns platform-specific object flags, if any.
virtual unsigned getPlatformFlags() const = 0;
elf_symbol_iterator_range symbols() const;
static bool classof(const Binary *v) { return v->isELF(); }
Expected<SubtargetFeatures> getFeatures() const override;
std::optional<StringRef> tryGetCPUName() const override;
void setARMSubArch(Triple &TheTriple) const override;
virtual uint16_t getEType() const = 0;
virtual uint16_t getEMachine() const = 0;
virtual uint8_t getEIdentABIVersion() const = 0;
std::vector<ELFPltEntry> getPltEntries() const;
/// Returns a vector containing a symbol version for each dynamic symbol.
/// Returns an empty vector if version sections do not exist.
Expected<std::vector<VersionEntry>> readDynsymVersions() const;
/// Returns a vector of all BB address maps in the object file. When
/// `TextSectionIndex` is specified, only returns the BB address maps
/// corresponding to the section with that index. When `PGOAnalyses`is
/// specified (PGOAnalyses is not nullptr), the vector is cleared then filled
/// with extra PGO data. `PGOAnalyses` will always be the same length as the
/// return value when it is requested assuming no error occurs. Upon failure,
/// `PGOAnalyses` will be emptied.
Expected<std::vector<BBAddrMap>>
readBBAddrMap(std::optional<unsigned> TextSectionIndex = std::nullopt,
std::vector<PGOAnalysisMap> *PGOAnalyses = nullptr) const;
StringRef getCrelDecodeProblem(SectionRef Sec) const;
};
class ELFSectionRef : public SectionRef {
public:
ELFSectionRef(const SectionRef &B) : SectionRef(B) {
assert(isa<ELFObjectFileBase>(SectionRef::getObject()));
}
const ELFObjectFileBase *getObject() const {
return cast<ELFObjectFileBase>(SectionRef::getObject());
}
uint32_t getType() const {
return getObject()->getSectionType(getRawDataRefImpl());
}
uint64_t getFlags() const {
return getObject()->getSectionFlags(getRawDataRefImpl());
}
uint64_t getOffset() const {
return getObject()->getSectionOffset(getRawDataRefImpl());
}
};
class elf_section_iterator : public section_iterator {
public:
elf_section_iterator(const section_iterator &B) : section_iterator(B) {
assert(isa<ELFObjectFileBase>(B->getObject()));
}
const ELFSectionRef *operator->() const {
return static_cast<const ELFSectionRef *>(section_iterator::operator->());
}
const ELFSectionRef &operator*() const {
return static_cast<const ELFSectionRef &>(section_iterator::operator*());
}
};
class ELFSymbolRef : public SymbolRef {
public:
ELFSymbolRef(const SymbolRef &B) : SymbolRef(B) {
assert(isa<ELFObjectFileBase>(SymbolRef::getObject()));
}
const ELFObjectFileBase *getObject() const {
return cast<ELFObjectFileBase>(BasicSymbolRef::getObject());
}
uint64_t getSize() const {
return getObject()->getSymbolSize(getRawDataRefImpl());
}
uint8_t getBinding() const {
return getObject()->getSymbolBinding(getRawDataRefImpl());
}
uint8_t getOther() const {
return getObject()->getSymbolOther(getRawDataRefImpl());
}
uint8_t getELFType() const {
return getObject()->getSymbolELFType(getRawDataRefImpl());
}
StringRef getELFTypeName() const {
uint8_t Type = getELFType();
for (const auto &EE : ElfSymbolTypes) {
if (EE.Value == Type) {
return EE.AltName;
}
}
return "";
}
};
inline bool operator<(const ELFSymbolRef &A, const ELFSymbolRef &B) {
const DataRefImpl &DRIA = A.getRawDataRefImpl();
const DataRefImpl &DRIB = B.getRawDataRefImpl();
if (DRIA.d.a == DRIB.d.a)
return DRIA.d.b < DRIB.d.b;
return DRIA.d.a < DRIB.d.a;
}
class elf_symbol_iterator : public symbol_iterator {
public:
elf_symbol_iterator(const basic_symbol_iterator &B)
: symbol_iterator(SymbolRef(B->getRawDataRefImpl(),
cast<ELFObjectFileBase>(B->getObject()))) {}
const ELFSymbolRef *operator->() const {
return static_cast<const ELFSymbolRef *>(symbol_iterator::operator->());
}
const ELFSymbolRef &operator*() const {
return static_cast<const ELFSymbolRef &>(symbol_iterator::operator*());
}
};
class ELFRelocationRef : public RelocationRef {
public:
ELFRelocationRef(const RelocationRef &B) : RelocationRef(B) {
assert(isa<ELFObjectFileBase>(RelocationRef::getObject()));
}
const ELFObjectFileBase *getObject() const {
return cast<ELFObjectFileBase>(RelocationRef::getObject());
}
Expected<int64_t> getAddend() const {
return getObject()->getRelocationAddend(getRawDataRefImpl());
}
};
class elf_relocation_iterator : public relocation_iterator {
public:
elf_relocation_iterator(const relocation_iterator &B)
: relocation_iterator(RelocationRef(
B->getRawDataRefImpl(), cast<ELFObjectFileBase>(B->getObject()))) {}
const ELFRelocationRef *operator->() const {
return static_cast<const ELFRelocationRef *>(
relocation_iterator::operator->());
}
const ELFRelocationRef &operator*() const {
return static_cast<const ELFRelocationRef &>(
relocation_iterator::operator*());
}
};
inline ELFObjectFileBase::elf_symbol_iterator_range
ELFObjectFileBase::symbols() const {
return elf_symbol_iterator_range(symbol_begin(), symbol_end());
}
template <class ELFT> class ELFObjectFile : public ELFObjectFileBase {
uint16_t getEMachine() const override;
uint16_t getEType() const override;
uint8_t getEIdentABIVersion() const override;
uint64_t getSymbolSize(DataRefImpl Sym) const override;
public:
LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
SectionRef toSectionRef(const Elf_Shdr *Sec) const {
return SectionRef(toDRI(Sec), this);
}
ELFSymbolRef toSymbolRef(const Elf_Shdr *SymTable, unsigned SymbolNum) const {
return ELFSymbolRef({toDRI(SymTable, SymbolNum), this});
}
bool IsContentValid() const { return ContentValid; }
private:
ELFObjectFile(MemoryBufferRef Object, ELFFile<ELFT> EF,
const Elf_Shdr *DotDynSymSec, const Elf_Shdr *DotSymtabSec,
const Elf_Shdr *DotSymtabShndxSec);
bool ContentValid = false;
protected:
ELFFile<ELFT> EF;
const Elf_Shdr *DotDynSymSec = nullptr; // Dynamic symbol table section.
const Elf_Shdr *DotSymtabSec = nullptr; // Symbol table section.
const Elf_Shdr *DotSymtabShndxSec = nullptr; // SHT_SYMTAB_SHNDX section.
// Hold CREL relocations for SectionRef::relocations().
mutable SmallVector<SmallVector<Elf_Crel, 0>, 0> Crels;
mutable SmallVector<std::string, 0> CrelDecodeProblems;
Error initContent() override;
void moveSymbolNext(DataRefImpl &Symb) const override;
Expected<StringRef> getSymbolName(DataRefImpl Symb) const override;
Expected<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
uint64_t getSymbolValueImpl(DataRefImpl Symb) const override;
uint32_t getSymbolAlignment(DataRefImpl Symb) const override;
uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
Expected<uint32_t> getSymbolFlags(DataRefImpl Symb) const override;
uint8_t getSymbolBinding(DataRefImpl Symb) const override;
uint8_t getSymbolOther(DataRefImpl Symb) const override;
uint8_t getSymbolELFType(DataRefImpl Symb) const override;
Expected<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override;
Expected<section_iterator> getSymbolSection(const Elf_Sym *Symb,
const Elf_Shdr *SymTab) const;
Expected<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
void moveSectionNext(DataRefImpl &Sec) const override;
Expected<StringRef> getSectionName(DataRefImpl Sec) const override;
uint64_t getSectionAddress(DataRefImpl Sec) const override;
uint64_t getSectionIndex(DataRefImpl Sec) const override;
uint64_t getSectionSize(DataRefImpl Sec) const override;
Expected<ArrayRef<uint8_t>>
getSectionContents(DataRefImpl Sec) const override;
uint64_t getSectionAlignment(DataRefImpl Sec) const override;
bool isSectionCompressed(DataRefImpl Sec) const override;
bool isSectionText(DataRefImpl Sec) const override;
bool isSectionData(DataRefImpl Sec) const override;
bool isSectionBSS(DataRefImpl Sec) const override;
bool isSectionVirtual(DataRefImpl Sec) const override;
bool isBerkeleyText(DataRefImpl Sec) const override;
bool isBerkeleyData(DataRefImpl Sec) const override;
bool isDebugSection(DataRefImpl Sec) const override;
relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
relocation_iterator section_rel_end(DataRefImpl Sec) const override;
std::vector<SectionRef> dynamic_relocation_sections() const override;
Expected<section_iterator>
getRelocatedSection(DataRefImpl Sec) const override;
void moveRelocationNext(DataRefImpl &Rel) const override;
uint64_t getRelocationOffset(DataRefImpl Rel) const override;
symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
uint64_t getRelocationType(DataRefImpl Rel) const override;
void getRelocationTypeName(DataRefImpl Rel,
SmallVectorImpl<char> &Result) const override;
uint32_t getSectionType(DataRefImpl Sec) const override;
uint64_t getSectionFlags(DataRefImpl Sec) const override;
uint64_t getSectionOffset(DataRefImpl Sec) const override;
StringRef getRelocationTypeName(uint32_t Type) const;
DataRefImpl toDRI(const Elf_Shdr *SymTable, unsigned SymbolNum) const {
DataRefImpl DRI;
if (!SymTable) {
DRI.d.a = 0;
DRI.d.b = 0;
return DRI;
}
assert(SymTable->sh_type == ELF::SHT_SYMTAB ||
SymTable->sh_type == ELF::SHT_DYNSYM);
auto SectionsOrErr = EF.sections();
if (!SectionsOrErr) {
DRI.d.a = 0;
DRI.d.b = 0;
return DRI;
}
uintptr_t SHT = reinterpret_cast<uintptr_t>((*SectionsOrErr).begin());
unsigned SymTableIndex =
(reinterpret_cast<uintptr_t>(SymTable) - SHT) / sizeof(Elf_Shdr);
DRI.d.a = SymTableIndex;
DRI.d.b = SymbolNum;
return DRI;
}
const Elf_Shdr *toELFShdrIter(DataRefImpl Sec) const {
return reinterpret_cast<const Elf_Shdr *>(Sec.p);
}
DataRefImpl toDRI(const Elf_Shdr *Sec) const {
DataRefImpl DRI;
DRI.p = reinterpret_cast<uintptr_t>(Sec);
return DRI;
}
DataRefImpl toDRI(const Elf_Dyn *Dyn) const {
DataRefImpl DRI;
DRI.p = reinterpret_cast<uintptr_t>(Dyn);
return DRI;
}
bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
unsigned char Binding = ESym->getBinding();
unsigned char Visibility = ESym->getVisibility();
// A symbol is exported if its binding is either GLOBAL or WEAK, and its
// visibility is either DEFAULT or PROTECTED. All other symbols are not
// exported.
return (
(Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK ||
Binding == ELF::STB_GNU_UNIQUE) &&
(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED));
}
Error getBuildAttributes(ELFAttributeParser &Attributes) const override {
uint32_t Type;
switch (getEMachine()) {
case ELF::EM_ARM:
Type = ELF::SHT_ARM_ATTRIBUTES;
break;
case ELF::EM_RISCV:
Type = ELF::SHT_RISCV_ATTRIBUTES;
break;
case ELF::EM_HEXAGON:
Type = ELF::SHT_HEXAGON_ATTRIBUTES;
break;
default:
return Error::success();
}
auto SectionsOrErr = EF.sections();
if (!SectionsOrErr)
return SectionsOrErr.takeError();
for (const Elf_Shdr &Sec : *SectionsOrErr) {
if (Sec.sh_type != Type)
continue;
auto ErrorOrContents = EF.getSectionContents(Sec);
if (!ErrorOrContents)
return ErrorOrContents.takeError();
auto Contents = ErrorOrContents.get();
if (Contents[0] != ELFAttrs::Format_Version || Contents.size() == 1)
return Error::success();
if (Error E = Attributes.parse(Contents, ELFT::Endianness))
return E;
break;
}
return Error::success();
}
// This flag is used for classof, to distinguish ELFObjectFile from
// its subclass. If more subclasses will be created, this flag will
// have to become an enum.
bool isDyldELFObject = false;
public:
ELFObjectFile(ELFObjectFile<ELFT> &&Other);
static Expected<ELFObjectFile<ELFT>> create(MemoryBufferRef Object,
bool InitContent = true);
const Elf_Rel *getRel(DataRefImpl Rel) const;
const Elf_Rela *getRela(DataRefImpl Rela) const;
Elf_Crel getCrel(DataRefImpl Crel) const;
Expected<const Elf_Sym *> getSymbol(DataRefImpl Sym) const {
return EF.template getEntry<Elf_Sym>(Sym.d.a, Sym.d.b);
}
/// Get the relocation section that contains \a Rel.
const Elf_Shdr *getRelSection(DataRefImpl Rel) const {
auto RelSecOrErr = EF.getSection(Rel.d.a);
if (!RelSecOrErr)
report_fatal_error(
Twine(errorToErrorCode(RelSecOrErr.takeError()).message()));
return *RelSecOrErr;
}
const Elf_Shdr *getSection(DataRefImpl Sec) const {
return reinterpret_cast<const Elf_Shdr *>(Sec.p);
}
basic_symbol_iterator symbol_begin() const override;
basic_symbol_iterator symbol_end() const override;
bool is64Bit() const override { return getBytesInAddress() == 8; }
elf_symbol_iterator dynamic_symbol_begin() const;
elf_symbol_iterator dynamic_symbol_end() const;
section_iterator section_begin() const override;
section_iterator section_end() const override;
Expected<int64_t> getRelocationAddend(DataRefImpl Rel) const override;
uint8_t getBytesInAddress() const override;
StringRef getFileFormatName() const override;
Triple::ArchType getArch() const override;
Triple::OSType getOS() const override;
Expected<uint64_t> getStartAddress() const override;
unsigned getPlatformFlags() const override { return EF.getHeader().e_flags; }
const ELFFile<ELFT> &getELFFile() const { return EF; }
bool isDyldType() const { return isDyldELFObject; }
static bool classof(const Binary *v) {
return v->getType() ==
getELFType(ELFT::Endianness == llvm::endianness::little,
ELFT::Is64Bits);
}
elf_symbol_iterator_range getDynamicSymbolIterators() const override;
bool isRelocatableObject() const override;
void createFakeSections() { EF.createFakeSections(); }
StringRef getCrelDecodeProblem(DataRefImpl Sec) const;
};
using ELF32LEObjectFile = ELFObjectFile<ELF32LE>;
using ELF64LEObjectFile = ELFObjectFile<ELF64LE>;
using ELF32BEObjectFile = ELFObjectFile<ELF32BE>;
using ELF64BEObjectFile = ELFObjectFile<ELF64BE>;
template <class ELFT>
void ELFObjectFile<ELFT>::moveSymbolNext(DataRefImpl &Sym) const {
++Sym.d.b;
}
template <class ELFT> Error ELFObjectFile<ELFT>::initContent() {
auto SectionsOrErr = EF.sections();
if (!SectionsOrErr)
return SectionsOrErr.takeError();
for (const Elf_Shdr &Sec : *SectionsOrErr) {
switch (Sec.sh_type) {
case ELF::SHT_DYNSYM: {
if (!DotDynSymSec)
DotDynSymSec = &Sec;
break;
}
case ELF::SHT_SYMTAB: {
if (!DotSymtabSec)
DotSymtabSec = &Sec;
break;
}
case ELF::SHT_SYMTAB_SHNDX: {
if (!DotSymtabShndxSec)
DotSymtabShndxSec = &Sec;
break;
}
}
}
ContentValid = true;
return Error::success();
}
template <class ELFT>
Expected<StringRef> ELFObjectFile<ELFT>::getSymbolName(DataRefImpl Sym) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Sym);
if (!SymOrErr)
return SymOrErr.takeError();
auto SymTabOrErr = EF.getSection(Sym.d.a);
if (!SymTabOrErr)
return SymTabOrErr.takeError();
const Elf_Shdr *SymTableSec = *SymTabOrErr;
auto StrTabOrErr = EF.getSection(SymTableSec->sh_link);
if (!StrTabOrErr)
return StrTabOrErr.takeError();
const Elf_Shdr *StringTableSec = *StrTabOrErr;
auto SymStrTabOrErr = EF.getStringTable(*StringTableSec);
if (!SymStrTabOrErr)
return SymStrTabOrErr.takeError();
Expected<StringRef> Name = (*SymOrErr)->getName(*SymStrTabOrErr);
if (Name && !Name->empty())
return Name;
// If the symbol name is empty use the section name.
if ((*SymOrErr)->getType() == ELF::STT_SECTION) {
Expected<section_iterator> SecOrErr = getSymbolSection(Sym);
if (SecOrErr)
return (*SecOrErr)->getName();
return SecOrErr.takeError();
}
return Name;
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getSectionFlags(DataRefImpl Sec) const {
return getSection(Sec)->sh_flags;
}
template <class ELFT>
uint32_t ELFObjectFile<ELFT>::getSectionType(DataRefImpl Sec) const {
return getSection(Sec)->sh_type;
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getSectionOffset(DataRefImpl Sec) const {
return getSection(Sec)->sh_offset;
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getSymbolValueImpl(DataRefImpl Symb) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Symb);
if (!SymOrErr)
report_fatal_error(SymOrErr.takeError());
uint64_t Ret = (*SymOrErr)->st_value;
if ((*SymOrErr)->st_shndx == ELF::SHN_ABS)
return Ret;
const Elf_Ehdr &Header = EF.getHeader();
// Clear the ARM/Thumb or microMIPS indicator flag.
if ((Header.e_machine == ELF::EM_ARM || Header.e_machine == ELF::EM_MIPS) &&
(*SymOrErr)->getType() == ELF::STT_FUNC)
Ret &= ~1;
return Ret;
}
template <class ELFT>
Expected<uint64_t>
ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb) const {
Expected<uint64_t> SymbolValueOrErr = getSymbolValue(Symb);
if (!SymbolValueOrErr)
// TODO: Test this error.
return SymbolValueOrErr.takeError();
uint64_t Result = *SymbolValueOrErr;
Expected<const Elf_Sym *> SymOrErr = getSymbol(Symb);
if (!SymOrErr)
return SymOrErr.takeError();
switch ((*SymOrErr)->st_shndx) {
case ELF::SHN_COMMON:
case ELF::SHN_UNDEF:
case ELF::SHN_ABS:
return Result;
}
auto SymTabOrErr = EF.getSection(Symb.d.a);
if (!SymTabOrErr)
return SymTabOrErr.takeError();
if (EF.getHeader().e_type == ELF::ET_REL) {
ArrayRef<Elf_Word> ShndxTable;
if (DotSymtabShndxSec) {
// TODO: Test this error.
if (Expected<ArrayRef<Elf_Word>> ShndxTableOrErr =
EF.getSHNDXTable(*DotSymtabShndxSec))
ShndxTable = *ShndxTableOrErr;
else
return ShndxTableOrErr.takeError();
}
Expected<const Elf_Shdr *> SectionOrErr =
EF.getSection(**SymOrErr, *SymTabOrErr, ShndxTable);
if (!SectionOrErr)
return SectionOrErr.takeError();
const Elf_Shdr *Section = *SectionOrErr;
if (Section)
Result += Section->sh_addr;
}
return Result;
}
template <class ELFT>
uint32_t ELFObjectFile<ELFT>::getSymbolAlignment(DataRefImpl Symb) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Symb);
if (!SymOrErr)
report_fatal_error(SymOrErr.takeError());
if ((*SymOrErr)->st_shndx == ELF::SHN_COMMON)
return (*SymOrErr)->st_value;
return 0;
}
template <class ELFT>
uint16_t ELFObjectFile<ELFT>::getEMachine() const {
return EF.getHeader().e_machine;
}
template <class ELFT> uint16_t ELFObjectFile<ELFT>::getEType() const {
return EF.getHeader().e_type;
}
template <class ELFT> uint8_t ELFObjectFile<ELFT>::getEIdentABIVersion() const {
return EF.getHeader().e_ident[ELF::EI_ABIVERSION];
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getSymbolSize(DataRefImpl Sym) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Sym);
if (!SymOrErr)
report_fatal_error(SymOrErr.takeError());
return (*SymOrErr)->st_size;
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
return getSymbolSize(Symb);
}
template <class ELFT>
uint8_t ELFObjectFile<ELFT>::getSymbolBinding(DataRefImpl Symb) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Symb);
if (!SymOrErr)
report_fatal_error(SymOrErr.takeError());
return (*SymOrErr)->getBinding();
}
template <class ELFT>
uint8_t ELFObjectFile<ELFT>::getSymbolOther(DataRefImpl Symb) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Symb);
if (!SymOrErr)
report_fatal_error(SymOrErr.takeError());
return (*SymOrErr)->st_other;
}
template <class ELFT>
uint8_t ELFObjectFile<ELFT>::getSymbolELFType(DataRefImpl Symb) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Symb);
if (!SymOrErr)
report_fatal_error(SymOrErr.takeError());
return (*SymOrErr)->getType();
}
template <class ELFT>
Expected<SymbolRef::Type>
ELFObjectFile<ELFT>::getSymbolType(DataRefImpl Symb) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Symb);
if (!SymOrErr)
return SymOrErr.takeError();
switch ((*SymOrErr)->getType()) {
case ELF::STT_NOTYPE:
return SymbolRef::ST_Unknown;
case ELF::STT_SECTION:
return SymbolRef::ST_Debug;
case ELF::STT_FILE:
return SymbolRef::ST_File;
case ELF::STT_FUNC:
return SymbolRef::ST_Function;
case ELF::STT_OBJECT:
case ELF::STT_COMMON:
return SymbolRef::ST_Data;
case ELF::STT_TLS:
default:
return SymbolRef::ST_Other;
}
}
template <class ELFT>
Expected<uint32_t> ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Sym) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Sym);
if (!SymOrErr)
return SymOrErr.takeError();
const Elf_Sym *ESym = *SymOrErr;
uint32_t Result = SymbolRef::SF_None;
if (ESym->getBinding() != ELF::STB_LOCAL)
Result |= SymbolRef::SF_Global;
if (ESym->getBinding() == ELF::STB_WEAK)
Result |= SymbolRef::SF_Weak;
if (ESym->st_shndx == ELF::SHN_ABS)
Result |= SymbolRef::SF_Absolute;
if (ESym->getType() == ELF::STT_FILE || ESym->getType() == ELF::STT_SECTION)
Result |= SymbolRef::SF_FormatSpecific;
if (Expected<typename ELFT::SymRange> SymbolsOrErr =
EF.symbols(DotSymtabSec)) {
// Set the SF_FormatSpecific flag for the 0-index null symbol.
if (ESym == SymbolsOrErr->begin())
Result |= SymbolRef::SF_FormatSpecific;
} else
// TODO: Test this error.
return SymbolsOrErr.takeError();
if (Expected<typename ELFT::SymRange> SymbolsOrErr =
EF.symbols(DotDynSymSec)) {
// Set the SF_FormatSpecific flag for the 0-index null symbol.
if (ESym == SymbolsOrErr->begin())
Result |= SymbolRef::SF_FormatSpecific;
} else
// TODO: Test this error.
return SymbolsOrErr.takeError();
if (EF.getHeader().e_machine == ELF::EM_AARCH64) {
if (Expected<StringRef> NameOrErr = getSymbolName(Sym)) {
StringRef Name = *NameOrErr;
if (Name.starts_with("$d") || Name.starts_with("$x"))
Result |= SymbolRef::SF_FormatSpecific;
} else {
// TODO: Actually report errors helpfully.
consumeError(NameOrErr.takeError());
}
} else if (EF.getHeader().e_machine == ELF::EM_ARM) {
if (Expected<StringRef> NameOrErr = getSymbolName(Sym)) {
StringRef Name = *NameOrErr;
// TODO Investigate why empty name symbols need to be marked.
if (Name.empty() || Name.starts_with("$d") || Name.starts_with("$t") ||
Name.starts_with("$a"))
Result |= SymbolRef::SF_FormatSpecific;
} else {
// TODO: Actually report errors helpfully.
consumeError(NameOrErr.takeError());
}
if (ESym->getType() == ELF::STT_FUNC && (ESym->st_value & 1) == 1)
Result |= SymbolRef::SF_Thumb;
} else if (EF.getHeader().e_machine == ELF::EM_CSKY) {
if (Expected<StringRef> NameOrErr = getSymbolName(Sym)) {
StringRef Name = *NameOrErr;
if (Name.starts_with("$d") || Name.starts_with("$t"))
Result |= SymbolRef::SF_FormatSpecific;
} else {
// TODO: Actually report errors helpfully.
consumeError(NameOrErr.takeError());
}
} else if (EF.getHeader().e_machine == ELF::EM_RISCV) {
if (Expected<StringRef> NameOrErr = getSymbolName(Sym)) {
StringRef Name = *NameOrErr;
// Mark fake labels (used for label differences) and mapping symbols.
if (Name == ".L0 " || Name.starts_with("$d") || Name.starts_with("$x"))
Result |= SymbolRef::SF_FormatSpecific;
} else {
// TODO: Actually report errors helpfully.
consumeError(NameOrErr.takeError());
}
}
if (ESym->st_shndx == ELF::SHN_UNDEF)
Result |= SymbolRef::SF_Undefined;
if (ESym->getType() == ELF::STT_COMMON || ESym->st_shndx == ELF::SHN_COMMON)
Result |= SymbolRef::SF_Common;
if (isExportedToOtherDSO(ESym))
Result |= SymbolRef::SF_Exported;
if (ESym->getType() == ELF::STT_GNU_IFUNC)
Result |= SymbolRef::SF_Indirect;
if (ESym->getVisibility() == ELF::STV_HIDDEN)
Result |= SymbolRef::SF_Hidden;
return Result;
}
template <class ELFT>
Expected<section_iterator>
ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym,
const Elf_Shdr *SymTab) const {
ArrayRef<Elf_Word> ShndxTable;
if (DotSymtabShndxSec) {
// TODO: Test this error.
Expected<ArrayRef<Elf_Word>> ShndxTableOrErr =
EF.getSHNDXTable(*DotSymtabShndxSec);
if (!ShndxTableOrErr)
return ShndxTableOrErr.takeError();
ShndxTable = *ShndxTableOrErr;
}
auto ESecOrErr = EF.getSection(*ESym, SymTab, ShndxTable);
if (!ESecOrErr)
return ESecOrErr.takeError();
const Elf_Shdr *ESec = *ESecOrErr;
if (!ESec)
return section_end();
DataRefImpl Sec;
Sec.p = reinterpret_cast<intptr_t>(ESec);
return section_iterator(SectionRef(Sec, this));
}
template <class ELFT>
Expected<section_iterator>
ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb) const {
Expected<const Elf_Sym *> SymOrErr = getSymbol(Symb);
if (!SymOrErr)
return SymOrErr.takeError();
auto SymTabOrErr = EF.getSection(Symb.d.a);
if (!SymTabOrErr)
return SymTabOrErr.takeError();
return getSymbolSection(*SymOrErr, *SymTabOrErr);
}
template <class ELFT>
void ELFObjectFile<ELFT>::moveSectionNext(DataRefImpl &Sec) const {
const Elf_Shdr *ESec = getSection(Sec);
Sec = toDRI(++ESec);
}
template <class ELFT>
Expected<StringRef> ELFObjectFile<ELFT>::getSectionName(DataRefImpl Sec) const {
return EF.getSectionName(*getSection(Sec));
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getSectionAddress(DataRefImpl Sec) const {
return getSection(Sec)->sh_addr;
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getSectionIndex(DataRefImpl Sec) const {
auto SectionsOrErr = EF.sections();
handleAllErrors(std::move(SectionsOrErr.takeError()),
[](const ErrorInfoBase &) {
llvm_unreachable("unable to get section index");
});
const Elf_Shdr *First = SectionsOrErr->begin();
return getSection(Sec) - First;
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getSectionSize(DataRefImpl Sec) const {
return getSection(Sec)->sh_size;
}
template <class ELFT>
Expected<ArrayRef<uint8_t>>
ELFObjectFile<ELFT>::getSectionContents(DataRefImpl Sec) const {
const Elf_Shdr *EShdr = getSection(Sec);
if (EShdr->sh_type == ELF::SHT_NOBITS)
return ArrayRef((const uint8_t *)base(), (size_t)0);
if (Error E =
checkOffset(getMemoryBufferRef(),
(uintptr_t)base() + EShdr->sh_offset, EShdr->sh_size))
return std::move(E);
return ArrayRef((const uint8_t *)base() + EShdr->sh_offset, EShdr->sh_size);
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getSectionAlignment(DataRefImpl Sec) const {
return getSection(Sec)->sh_addralign;
}
template <class ELFT>
bool ELFObjectFile<ELFT>::isSectionCompressed(DataRefImpl Sec) const {
return getSection(Sec)->sh_flags & ELF::SHF_COMPRESSED;
}
template <class ELFT>
bool ELFObjectFile<ELFT>::isSectionText(DataRefImpl Sec) const {
return getSection(Sec)->sh_flags & ELF::SHF_EXECINSTR;
}
template <class ELFT>
bool ELFObjectFile<ELFT>::isSectionData(DataRefImpl Sec) const {
const Elf_Shdr *EShdr = getSection(Sec);
return EShdr->sh_type == ELF::SHT_PROGBITS &&
EShdr->sh_flags & ELF::SHF_ALLOC &&
!(EShdr->sh_flags & ELF::SHF_EXECINSTR);
}
template <class ELFT>
bool ELFObjectFile<ELFT>::isSectionBSS(DataRefImpl Sec) const {
const Elf_Shdr *EShdr = getSection(Sec);
return EShdr->sh_flags & (ELF::SHF_ALLOC | ELF::SHF_WRITE) &&
EShdr->sh_type == ELF::SHT_NOBITS;
}
template <class ELFT>
std::vector<SectionRef>
ELFObjectFile<ELFT>::dynamic_relocation_sections() const {
std::vector<SectionRef> Res;
std::vector<uintptr_t> Offsets;
auto SectionsOrErr = EF.sections();
if (!SectionsOrErr)
return Res;
for (const Elf_Shdr &Sec : *SectionsOrErr) {
if (Sec.sh_type != ELF::SHT_DYNAMIC)
continue;
Elf_Dyn *Dynamic =
reinterpret_cast<Elf_Dyn *>((uintptr_t)base() + Sec.sh_offset);
for (; Dynamic->d_tag != ELF::DT_NULL; Dynamic++) {
if (Dynamic->d_tag == ELF::DT_REL || Dynamic->d_tag == ELF::DT_RELA ||
Dynamic->d_tag == ELF::DT_JMPREL) {
Offsets.push_back(Dynamic->d_un.d_val);
}
}
}
for (const Elf_Shdr &Sec : *SectionsOrErr) {
if (is_contained(Offsets, Sec.sh_addr))
Res.emplace_back(toDRI(&Sec), this);
}
return Res;
}
template <class ELFT>
bool ELFObjectFile<ELFT>::isSectionVirtual(DataRefImpl Sec) const {
return getSection(Sec)->sh_type == ELF::SHT_NOBITS;
}
template <class ELFT>
bool ELFObjectFile<ELFT>::isBerkeleyText(DataRefImpl Sec) const {
return getSection(Sec)->sh_flags & ELF::SHF_ALLOC &&
(getSection(Sec)->sh_flags & ELF::SHF_EXECINSTR ||
!(getSection(Sec)->sh_flags & ELF::SHF_WRITE));
}
template <class ELFT>
bool ELFObjectFile<ELFT>::isBerkeleyData(DataRefImpl Sec) const {
const Elf_Shdr *EShdr = getSection(Sec);
return !isBerkeleyText(Sec) && EShdr->sh_type != ELF::SHT_NOBITS &&
EShdr->sh_flags & ELF::SHF_ALLOC;
}
template <class ELFT>
bool ELFObjectFile<ELFT>::isDebugSection(DataRefImpl Sec) const {
Expected<StringRef> SectionNameOrErr = getSectionName(Sec);
if (!SectionNameOrErr) {
// TODO: Report the error message properly.
consumeError(SectionNameOrErr.takeError());
return false;
}
StringRef SectionName = SectionNameOrErr.get();
return SectionName.starts_with(".debug") ||
SectionName.starts_with(".zdebug") || SectionName == ".gdb_index";
}
template <class ELFT>
relocation_iterator
ELFObjectFile<ELFT>::section_rel_begin(DataRefImpl Sec) const {
DataRefImpl RelData;
auto SectionsOrErr = EF.sections();
if (!SectionsOrErr)
return relocation_iterator(RelocationRef());
uintptr_t SHT = reinterpret_cast<uintptr_t>((*SectionsOrErr).begin());
RelData.d.a = (Sec.p - SHT) / EF.getHeader().e_shentsize;
RelData.d.b = 0;
if (reinterpret_cast<const Elf_Shdr *>(Sec.p)->sh_type == ELF::SHT_CREL) {
if (RelData.d.a + 1 > Crels.size())
Crels.resize(RelData.d.a + 1);
auto &Crel = Crels[RelData.d.a];
if (Crel.empty()) {
ArrayRef<uint8_t> Content = cantFail(getSectionContents(Sec));
size_t I = 0;
Error Err = decodeCrel<ELFT::Is64Bits>(
Content, [&](uint64_t Count, bool) { Crel.resize(Count); },
[&](Elf_Crel Crel) { Crels[RelData.d.a][I++] = Crel; });
if (Err) {
Crel.assign(1, Elf_Crel{0, 0, 0, 0});
if (RelData.d.a + 1 > CrelDecodeProblems.size())
CrelDecodeProblems.resize(RelData.d.a + 1);
CrelDecodeProblems[RelData.d.a] = toString(std::move(Err));
}
}
}
return relocation_iterator(RelocationRef(RelData, this));
}
template <class ELFT>
relocation_iterator
ELFObjectFile<ELFT>::section_rel_end(DataRefImpl Sec) const {
const Elf_Shdr *S = reinterpret_cast<const Elf_Shdr *>(Sec.p);
relocation_iterator Begin = section_rel_begin(Sec);
DataRefImpl RelData = Begin->getRawDataRefImpl();
if (S->sh_type == ELF::SHT_CREL) {
RelData.d.b = Crels[RelData.d.a].size();
return relocation_iterator(RelocationRef(RelData, this));
}
if (S->sh_type != ELF::SHT_RELA && S->sh_type != ELF::SHT_REL)
return Begin;
const Elf_Shdr *RelSec = getRelSection(RelData);
// Error check sh_link here so that getRelocationSymbol can just use it.
auto SymSecOrErr = EF.getSection(RelSec->sh_link);
if (!SymSecOrErr)
report_fatal_error(
Twine(errorToErrorCode(SymSecOrErr.takeError()).message()));
RelData.d.b += S->sh_size / S->sh_entsize;
return relocation_iterator(RelocationRef(RelData, this));
}
template <class ELFT>
Expected<section_iterator>
ELFObjectFile<ELFT>::getRelocatedSection(DataRefImpl Sec) const {
const Elf_Shdr *EShdr = getSection(Sec);
uintX_t Type = EShdr->sh_type;
if (Type != ELF::SHT_REL && Type != ELF::SHT_RELA && Type != ELF::SHT_CREL)
return section_end();
Expected<const Elf_Shdr *> SecOrErr = EF.getSection(EShdr->sh_info);
if (!SecOrErr)
return SecOrErr.takeError();
return section_iterator(SectionRef(toDRI(*SecOrErr), this));
}
// Relocations
template <class ELFT>
void ELFObjectFile<ELFT>::moveRelocationNext(DataRefImpl &Rel) const {
++Rel.d.b;
}
template <class ELFT>
symbol_iterator
ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
uint32_t symbolIdx;
const Elf_Shdr *sec = getRelSection(Rel);
if (sec->sh_type == ELF::SHT_CREL)
symbolIdx = getCrel(Rel).r_symidx;
else if (sec->sh_type == ELF::SHT_REL)
symbolIdx = getRel(Rel)->getSymbol(EF.isMips64EL());
else
symbolIdx = getRela(Rel)->getSymbol(EF.isMips64EL());
if (!symbolIdx)
return symbol_end();
// FIXME: error check symbolIdx
DataRefImpl SymbolData;
SymbolData.d.a = sec->sh_link;
SymbolData.d.b = symbolIdx;
return symbol_iterator(SymbolRef(SymbolData, this));
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getRelocationOffset(DataRefImpl Rel) const {
const Elf_Shdr *sec = getRelSection(Rel);
if (sec->sh_type == ELF::SHT_CREL)
return getCrel(Rel).r_offset;
if (sec->sh_type == ELF::SHT_REL)
return getRel(Rel)->r_offset;
return getRela(Rel)->r_offset;
}
template <class ELFT>
uint64_t ELFObjectFile<ELFT>::getRelocationType(DataRefImpl Rel) const {
const Elf_Shdr *sec = getRelSection(Rel);
if (sec->sh_type == ELF::SHT_CREL)
return getCrel(Rel).r_type;
if (sec->sh_type == ELF::SHT_REL)
return getRel(Rel)->getType(EF.isMips64EL());
else
return getRela(Rel)->getType(EF.isMips64EL());
}
template <class ELFT>
StringRef ELFObjectFile<ELFT>::getRelocationTypeName(uint32_t Type) const {
return getELFRelocationTypeName(EF.getHeader().e_machine, Type);
}
template <class ELFT>
void ELFObjectFile<ELFT>::getRelocationTypeName(
DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
uint32_t type = getRelocationType(Rel);
EF.getRelocationTypeName(type, Result);
}
template <class ELFT>
Expected<int64_t>
ELFObjectFile<ELFT>::getRelocationAddend(DataRefImpl Rel) const {
if (getRelSection(Rel)->sh_type == ELF::SHT_RELA)
return (int64_t)getRela(Rel)->r_addend;
if (getRelSection(Rel)->sh_type == ELF::SHT_CREL)
return (int64_t)getCrel(Rel).r_addend;
return createError("Relocation section does not have addends");
}
template <class ELFT>
const typename ELFObjectFile<ELFT>::Elf_Rel *
ELFObjectFile<ELFT>::getRel(DataRefImpl Rel) const {
assert(getRelSection(Rel)->sh_type == ELF::SHT_REL);
auto Ret = EF.template getEntry<Elf_Rel>(Rel.d.a, Rel.d.b);
if (!Ret)
report_fatal_error(Twine(errorToErrorCode(Ret.takeError()).message()));
return *Ret;
}
template <class ELFT>
const typename ELFObjectFile<ELFT>::Elf_Rela *
ELFObjectFile<ELFT>::getRela(DataRefImpl Rela) const {
assert(getRelSection(Rela)->sh_type == ELF::SHT_RELA);
auto Ret = EF.template getEntry<Elf_Rela>(Rela.d.a, Rela.d.b);
if (!Ret)
report_fatal_error(Twine(errorToErrorCode(Ret.takeError()).message()));
return *Ret;
}
template <class ELFT>
typename ELFObjectFile<ELFT>::Elf_Crel
ELFObjectFile<ELFT>::getCrel(DataRefImpl Crel) const {
assert(getRelSection(Crel)->sh_type == ELF::SHT_CREL);
assert(Crel.d.a < Crels.size());
return Crels[Crel.d.a][Crel.d.b];
}
template <class ELFT>
Expected<ELFObjectFile<ELFT>>
ELFObjectFile<ELFT>::create(MemoryBufferRef Object, bool InitContent) {
auto EFOrErr = ELFFile<ELFT>::create(Object.getBuffer());
if (Error E = EFOrErr.takeError())
return std::move(E);
ELFObjectFile<ELFT> Obj = {Object, std::move(*EFOrErr), nullptr, nullptr,
nullptr};
if (InitContent)
if (Error E = Obj.initContent())
return std::move(E);
return std::move(Obj);
}
template <class ELFT>
ELFObjectFile<ELFT>::ELFObjectFile(MemoryBufferRef Object, ELFFile<ELFT> EF,
const Elf_Shdr *DotDynSymSec,
const Elf_Shdr *DotSymtabSec,
const Elf_Shdr *DotSymtabShndx)
: ELFObjectFileBase(getELFType(ELFT::Endianness == llvm::endianness::little,
ELFT::Is64Bits),
Object),
EF(EF), DotDynSymSec(DotDynSymSec), DotSymtabSec(DotSymtabSec),
DotSymtabShndxSec(DotSymtabShndx) {}
template <class ELFT>
ELFObjectFile<ELFT>::ELFObjectFile(ELFObjectFile<ELFT> &&Other)
: ELFObjectFile(Other.Data, Other.EF, Other.DotDynSymSec,
Other.DotSymtabSec, Other.DotSymtabShndxSec) {}
template <class ELFT>
basic_symbol_iterator ELFObjectFile<ELFT>::symbol_begin() const {
DataRefImpl Sym =
toDRI(DotSymtabSec,
DotSymtabSec && DotSymtabSec->sh_size >= sizeof(Elf_Sym) ? 1 : 0);
return basic_symbol_iterator(SymbolRef(Sym, this));
}
template <class ELFT>
basic_symbol_iterator ELFObjectFile<ELFT>::symbol_end() const {
const Elf_Shdr *SymTab = DotSymtabSec;
if (!SymTab)
return symbol_begin();
DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
return basic_symbol_iterator(SymbolRef(Sym, this));
}
template <class ELFT>
elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_begin() const {
if (!DotDynSymSec || DotDynSymSec->sh_size < sizeof(Elf_Sym))
// Ignore errors here where the dynsym is empty or sh_size less than the
// size of one symbol. These should be handled elsewhere.
return symbol_iterator(SymbolRef(toDRI(DotDynSymSec, 0), this));
// Skip 0-index NULL symbol.
return symbol_iterator(SymbolRef(toDRI(DotDynSymSec, 1), this));
}
template <class ELFT>
elf_symbol_iterator ELFObjectFile<ELFT>::dynamic_symbol_end() const {
const Elf_Shdr *SymTab = DotDynSymSec;
if (!SymTab)
return dynamic_symbol_begin();
DataRefImpl Sym = toDRI(SymTab, SymTab->sh_size / sizeof(Elf_Sym));
return basic_symbol_iterator(SymbolRef(Sym, this));
}
template <class ELFT>
section_iterator ELFObjectFile<ELFT>::section_begin() const {
auto SectionsOrErr = EF.sections();
if (!SectionsOrErr)
return section_iterator(SectionRef());
return section_iterator(SectionRef(toDRI((*SectionsOrErr).begin()), this));
}
template <class ELFT>
section_iterator ELFObjectFile<ELFT>::section_end() const {
auto SectionsOrErr = EF.sections();
if (!SectionsOrErr)
return section_iterator(SectionRef());
return section_iterator(SectionRef(toDRI((*SectionsOrErr).end()), this));
}
template <class ELFT>
uint8_t ELFObjectFile<ELFT>::getBytesInAddress() const {
return ELFT::Is64Bits ? 8 : 4;
}
template <class ELFT>
StringRef ELFObjectFile<ELFT>::getFileFormatName() const {
constexpr bool IsLittleEndian = ELFT::Endianness == llvm::endianness::little;
switch (EF.getHeader().e_ident[ELF::EI_CLASS]) {
case ELF::ELFCLASS32:
switch (EF.getHeader().e_machine) {
case ELF::EM_68K:
return "elf32-m68k";
case ELF::EM_386:
return "elf32-i386";
case ELF::EM_IAMCU:
return "elf32-iamcu";
case ELF::EM_X86_64:
return "elf32-x86-64";
case ELF::EM_ARM:
return (IsLittleEndian ? "elf32-littlearm" : "elf32-bigarm");
case ELF::EM_AVR:
return "elf32-avr";
case ELF::EM_HEXAGON:
return "elf32-hexagon";
case ELF::EM_LANAI:
return "elf32-lanai";
case ELF::EM_MIPS:
return "elf32-mips";
case ELF::EM_MSP430:
return "elf32-msp430";
case ELF::EM_PPC:
return (IsLittleEndian ? "elf32-powerpcle" : "elf32-powerpc");
case ELF::EM_RISCV:
return "elf32-littleriscv";
case ELF::EM_CSKY:
return "elf32-csky";
case ELF::EM_SPARC:
case ELF::EM_SPARC32PLUS:
return "elf32-sparc";
case ELF::EM_AMDGPU:
return "elf32-amdgpu";
case ELF::EM_LOONGARCH:
return "elf32-loongarch";
case ELF::EM_XTENSA:
return "elf32-xtensa";
default:
return "elf32-unknown";
}
case ELF::ELFCLASS64:
switch (EF.getHeader().e_machine) {
case ELF::EM_386:
return "elf64-i386";
case ELF::EM_X86_64:
return "elf64-x86-64";
case ELF::EM_AARCH64:
return (IsLittleEndian ? "elf64-littleaarch64" : "elf64-bigaarch64");
case ELF::EM_PPC64:
return (IsLittleEndian ? "elf64-powerpcle" : "elf64-powerpc");
case ELF::EM_RISCV:
return "elf64-littleriscv";
case ELF::EM_S390:
return "elf64-s390";
case ELF::EM_SPARCV9:
return "elf64-sparc";
case ELF::EM_MIPS:
return "elf64-mips";
case ELF::EM_AMDGPU:
return "elf64-amdgpu";
case ELF::EM_BPF:
return "elf64-bpf";
case ELF::EM_VE:
return "elf64-ve";
case ELF::EM_LOONGARCH:
return "elf64-loongarch";
default:
return "elf64-unknown";
}
default:
// FIXME: Proper error handling.
report_fatal_error("Invalid ELFCLASS!");
}
}
template <class ELFT> Triple::ArchType ELFObjectFile<ELFT>::getArch() const {
bool IsLittleEndian = ELFT::Endianness == llvm::endianness::little;
switch (EF.getHeader().e_machine) {
case ELF::EM_68K:
return Triple::m68k;
case ELF::EM_386:
case ELF::EM_IAMCU:
return Triple::x86;
case ELF::EM_X86_64:
return Triple::x86_64;
case ELF::EM_AARCH64:
return IsLittleEndian ? Triple::aarch64 : Triple::aarch64_be;
case ELF::EM_ARM:
return Triple::arm;
case ELF::EM_AVR:
return Triple::avr;
case ELF::EM_HEXAGON:
return Triple::hexagon;
case ELF::EM_LANAI:
return Triple::lanai;
case ELF::EM_MIPS:
switch (EF.getHeader().e_ident[ELF::EI_CLASS]) {
case ELF::ELFCLASS32:
return IsLittleEndian ? Triple::mipsel : Triple::mips;
case ELF::ELFCLASS64:
return IsLittleEndian ? Triple::mips64el : Triple::mips64;
default:
report_fatal_error("Invalid ELFCLASS!");
}
case ELF::EM_MSP430:
return Triple::msp430;
case ELF::EM_PPC:
return IsLittleEndian ? Triple::ppcle : Triple::ppc;
case ELF::EM_PPC64:
return IsLittleEndian ? Triple::ppc64le : Triple::ppc64;
case ELF::EM_RISCV:
switch (EF.getHeader().e_ident[ELF::EI_CLASS]) {
case ELF::ELFCLASS32:
return Triple::riscv32;
case ELF::ELFCLASS64:
return Triple::riscv64;
default:
report_fatal_error("Invalid ELFCLASS!");
}
case ELF::EM_S390:
return Triple::systemz;
case ELF::EM_SPARC:
case ELF::EM_SPARC32PLUS:
return IsLittleEndian ? Triple::sparcel : Triple::sparc;
case ELF::EM_SPARCV9:
return Triple::sparcv9;
case ELF::EM_AMDGPU: {
if (!IsLittleEndian)
return Triple::UnknownArch;
unsigned MACH = EF.getHeader().e_flags & ELF::EF_AMDGPU_MACH;
if (MACH >= ELF::EF_AMDGPU_MACH_R600_FIRST &&
MACH <= ELF::EF_AMDGPU_MACH_R600_LAST)
return Triple::r600;
if (MACH >= ELF::EF_AMDGPU_MACH_AMDGCN_FIRST &&
MACH <= ELF::EF_AMDGPU_MACH_AMDGCN_LAST)
return Triple::amdgcn;
return Triple::UnknownArch;
}
case ELF::EM_CUDA: {
if (EF.getHeader().e_ident[ELF::EI_CLASS] == ELF::ELFCLASS32)
return Triple::nvptx;
return Triple::nvptx64;
}
case ELF::EM_BPF:
return IsLittleEndian ? Triple::bpfel : Triple::bpfeb;
case ELF::EM_VE:
return Triple::ve;
case ELF::EM_CSKY:
return Triple::csky;
case ELF::EM_LOONGARCH:
switch (EF.getHeader().e_ident[ELF::EI_CLASS]) {
case ELF::ELFCLASS32:
return Triple::loongarch32;
case ELF::ELFCLASS64:
return Triple::loongarch64;
default:
report_fatal_error("Invalid ELFCLASS!");
}
case ELF::EM_XTENSA:
return Triple::xtensa;
default:
return Triple::UnknownArch;
}
}
template <class ELFT> Triple::OSType ELFObjectFile<ELFT>::getOS() const {
switch (EF.getHeader().e_ident[ELF::EI_OSABI]) {
case ELF::ELFOSABI_NETBSD:
return Triple::NetBSD;
case ELF::ELFOSABI_LINUX:
return Triple::Linux;
case ELF::ELFOSABI_HURD:
return Triple::Hurd;
case ELF::ELFOSABI_SOLARIS:
return Triple::Solaris;
case ELF::ELFOSABI_AIX:
return Triple::AIX;
case ELF::ELFOSABI_FREEBSD:
return Triple::FreeBSD;
case ELF::ELFOSABI_OPENBSD:
return Triple::OpenBSD;
case ELF::ELFOSABI_CUDA:
return Triple::CUDA;
case ELF::ELFOSABI_AMDGPU_HSA:
return Triple::AMDHSA;
case ELF::ELFOSABI_AMDGPU_PAL:
return Triple::AMDPAL;
case ELF::ELFOSABI_AMDGPU_MESA3D:
return Triple::Mesa3D;
default:
return Triple::UnknownOS;
}
}
template <class ELFT>
Expected<uint64_t> ELFObjectFile<ELFT>::getStartAddress() const {
return EF.getHeader().e_entry;
}
template <class ELFT>
ELFObjectFileBase::elf_symbol_iterator_range
ELFObjectFile<ELFT>::getDynamicSymbolIterators() const {
return make_range(dynamic_symbol_begin(), dynamic_symbol_end());
}
template <class ELFT> bool ELFObjectFile<ELFT>::isRelocatableObject() const {
return EF.getHeader().e_type == ELF::ET_REL;
}
template <class ELFT>
StringRef ELFObjectFile<ELFT>::getCrelDecodeProblem(DataRefImpl Sec) const {
uintptr_t SHT = reinterpret_cast<uintptr_t>(cantFail(EF.sections()).begin());
auto I = (Sec.p - SHT) / EF.getHeader().e_shentsize;
if (I < CrelDecodeProblems.size())
return CrelDecodeProblems[I];
return "";
}
} // end namespace object
} // end namespace llvm
#endif // LLVM_OBJECT_ELFOBJECTFILE_H
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