forked from OSchip/llvm-project
691 lines
22 KiB
C++
691 lines
22 KiB
C++
//===------ utils/elf2yaml.cpp - obj2yaml conversion tool -------*- 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 "Error.h"
|
|
#include "llvm/ADT/DenseSet.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/Object/ELFObjectFile.h"
|
|
#include "llvm/ObjectYAML/ELFYAML.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/YAMLTraits.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
template <class ELFT>
|
|
class ELFDumper {
|
|
typedef object::Elf_Sym_Impl<ELFT> Elf_Sym;
|
|
typedef typename ELFT::Dyn Elf_Dyn;
|
|
typedef typename ELFT::Shdr Elf_Shdr;
|
|
typedef typename ELFT::Word Elf_Word;
|
|
typedef typename ELFT::Rel Elf_Rel;
|
|
typedef typename ELFT::Rela Elf_Rela;
|
|
|
|
ArrayRef<Elf_Shdr> Sections;
|
|
|
|
// If the file has multiple sections with the same name, we add a
|
|
// suffix to make them unique.
|
|
unsigned Suffix = 0;
|
|
DenseSet<StringRef> UsedSectionNames;
|
|
std::vector<std::string> SectionNames;
|
|
Expected<StringRef> getUniquedSectionName(const Elf_Shdr *Sec);
|
|
Expected<StringRef> getSymbolName(const Elf_Sym *Sym, StringRef StrTable,
|
|
const Elf_Shdr *SymTab);
|
|
|
|
const object::ELFFile<ELFT> &Obj;
|
|
ArrayRef<Elf_Word> ShndxTable;
|
|
|
|
std::error_code dumpSymbols(const Elf_Shdr *Symtab,
|
|
std::vector<ELFYAML::Symbol> &Symbols);
|
|
std::error_code dumpSymbol(const Elf_Sym *Sym, const Elf_Shdr *SymTab,
|
|
StringRef StrTable, ELFYAML::Symbol &S);
|
|
std::error_code dumpCommonSection(const Elf_Shdr *Shdr, ELFYAML::Section &S);
|
|
std::error_code dumpCommonRelocationSection(const Elf_Shdr *Shdr,
|
|
ELFYAML::RelocationSection &S);
|
|
template <class RelT>
|
|
std::error_code dumpRelocation(const RelT *Rel, const Elf_Shdr *SymTab,
|
|
ELFYAML::Relocation &R);
|
|
|
|
ErrorOr<ELFYAML::DynamicSection *> dumpDynamicSection(const Elf_Shdr *Shdr);
|
|
ErrorOr<ELFYAML::RelocationSection *> dumpRelocSection(const Elf_Shdr *Shdr);
|
|
ErrorOr<ELFYAML::RawContentSection *>
|
|
dumpContentSection(const Elf_Shdr *Shdr);
|
|
ErrorOr<ELFYAML::NoBitsSection *> dumpNoBitsSection(const Elf_Shdr *Shdr);
|
|
ErrorOr<ELFYAML::VerdefSection *> dumpVerdefSection(const Elf_Shdr *Shdr);
|
|
ErrorOr<ELFYAML::SymverSection *> dumpSymverSection(const Elf_Shdr *Shdr);
|
|
ErrorOr<ELFYAML::VerneedSection *> dumpVerneedSection(const Elf_Shdr *Shdr);
|
|
ErrorOr<ELFYAML::Group *> dumpGroup(const Elf_Shdr *Shdr);
|
|
ErrorOr<ELFYAML::MipsABIFlags *> dumpMipsABIFlags(const Elf_Shdr *Shdr);
|
|
|
|
public:
|
|
ELFDumper(const object::ELFFile<ELFT> &O);
|
|
ErrorOr<ELFYAML::Object *> dump();
|
|
};
|
|
|
|
}
|
|
|
|
template <class ELFT>
|
|
ELFDumper<ELFT>::ELFDumper(const object::ELFFile<ELFT> &O)
|
|
: Obj(O) {}
|
|
|
|
template <class ELFT>
|
|
Expected<StringRef>
|
|
ELFDumper<ELFT>::getUniquedSectionName(const Elf_Shdr *Sec) {
|
|
unsigned SecIndex = Sec - &Sections[0];
|
|
assert(&Sections[SecIndex] == Sec);
|
|
if (!SectionNames[SecIndex].empty())
|
|
return SectionNames[SecIndex];
|
|
|
|
auto NameOrErr = Obj.getSectionName(Sec);
|
|
if (!NameOrErr)
|
|
return NameOrErr;
|
|
StringRef Name = *NameOrErr;
|
|
std::string &Ret = SectionNames[SecIndex];
|
|
Ret = Name;
|
|
while (!UsedSectionNames.insert(Ret).second)
|
|
Ret = (Name + to_string(++Suffix)).str();
|
|
return Ret;
|
|
}
|
|
|
|
template <class ELFT>
|
|
Expected<StringRef> ELFDumper<ELFT>::getSymbolName(const Elf_Sym *Sym,
|
|
StringRef StrTable,
|
|
const Elf_Shdr *SymTab) {
|
|
Expected<StringRef> SymbolNameOrErr = Sym->getName(StrTable);
|
|
if (!SymbolNameOrErr)
|
|
return SymbolNameOrErr;
|
|
StringRef Name = *SymbolNameOrErr;
|
|
if (Name.empty() && Sym->getType() == ELF::STT_SECTION) {
|
|
auto ShdrOrErr = Obj.getSection(Sym, SymTab, ShndxTable);
|
|
if (!ShdrOrErr)
|
|
return ShdrOrErr.takeError();
|
|
return getUniquedSectionName(*ShdrOrErr);
|
|
}
|
|
return Name;
|
|
}
|
|
|
|
template <class ELFT> ErrorOr<ELFYAML::Object *> ELFDumper<ELFT>::dump() {
|
|
auto Y = make_unique<ELFYAML::Object>();
|
|
|
|
// Dump header
|
|
Y->Header.Class = ELFYAML::ELF_ELFCLASS(Obj.getHeader()->getFileClass());
|
|
Y->Header.Data = ELFYAML::ELF_ELFDATA(Obj.getHeader()->getDataEncoding());
|
|
Y->Header.OSABI = Obj.getHeader()->e_ident[ELF::EI_OSABI];
|
|
Y->Header.ABIVersion = Obj.getHeader()->e_ident[ELF::EI_ABIVERSION];
|
|
Y->Header.Type = Obj.getHeader()->e_type;
|
|
Y->Header.Machine = Obj.getHeader()->e_machine;
|
|
Y->Header.Flags = Obj.getHeader()->e_flags;
|
|
Y->Header.Entry = Obj.getHeader()->e_entry;
|
|
|
|
const Elf_Shdr *Symtab = nullptr;
|
|
const Elf_Shdr *DynSymtab = nullptr;
|
|
|
|
// Dump sections
|
|
auto SectionsOrErr = Obj.sections();
|
|
if (!SectionsOrErr)
|
|
return errorToErrorCode(SectionsOrErr.takeError());
|
|
Sections = *SectionsOrErr;
|
|
SectionNames.resize(Sections.size());
|
|
for (const Elf_Shdr &Sec : Sections) {
|
|
switch (Sec.sh_type) {
|
|
case ELF::SHT_DYNAMIC: {
|
|
ErrorOr<ELFYAML::DynamicSection *> S = dumpDynamicSection(&Sec);
|
|
if (std::error_code EC = S.getError())
|
|
return EC;
|
|
Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
|
|
break;
|
|
}
|
|
case ELF::SHT_NULL:
|
|
case ELF::SHT_STRTAB:
|
|
// Do not dump these sections.
|
|
break;
|
|
case ELF::SHT_SYMTAB:
|
|
Symtab = &Sec;
|
|
break;
|
|
case ELF::SHT_DYNSYM:
|
|
DynSymtab = &Sec;
|
|
break;
|
|
case ELF::SHT_SYMTAB_SHNDX: {
|
|
auto TableOrErr = Obj.getSHNDXTable(Sec);
|
|
if (!TableOrErr)
|
|
return errorToErrorCode(TableOrErr.takeError());
|
|
ShndxTable = *TableOrErr;
|
|
break;
|
|
}
|
|
case ELF::SHT_REL:
|
|
case ELF::SHT_RELA: {
|
|
ErrorOr<ELFYAML::RelocationSection *> S = dumpRelocSection(&Sec);
|
|
if (std::error_code EC = S.getError())
|
|
return EC;
|
|
Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
|
|
break;
|
|
}
|
|
case ELF::SHT_GROUP: {
|
|
ErrorOr<ELFYAML::Group *> G = dumpGroup(&Sec);
|
|
if (std::error_code EC = G.getError())
|
|
return EC;
|
|
Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(G.get()));
|
|
break;
|
|
}
|
|
case ELF::SHT_MIPS_ABIFLAGS: {
|
|
ErrorOr<ELFYAML::MipsABIFlags *> G = dumpMipsABIFlags(&Sec);
|
|
if (std::error_code EC = G.getError())
|
|
return EC;
|
|
Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(G.get()));
|
|
break;
|
|
}
|
|
case ELF::SHT_NOBITS: {
|
|
ErrorOr<ELFYAML::NoBitsSection *> S = dumpNoBitsSection(&Sec);
|
|
if (std::error_code EC = S.getError())
|
|
return EC;
|
|
Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
|
|
break;
|
|
}
|
|
case ELF::SHT_GNU_verdef: {
|
|
ErrorOr<ELFYAML::VerdefSection *> S = dumpVerdefSection(&Sec);
|
|
if (std::error_code EC = S.getError())
|
|
return EC;
|
|
Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
|
|
break;
|
|
}
|
|
case ELF::SHT_GNU_versym: {
|
|
ErrorOr<ELFYAML::SymverSection *> S = dumpSymverSection(&Sec);
|
|
if (std::error_code EC = S.getError())
|
|
return EC;
|
|
Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
|
|
break;
|
|
}
|
|
case ELF::SHT_GNU_verneed: {
|
|
ErrorOr<ELFYAML::VerneedSection *> S = dumpVerneedSection(&Sec);
|
|
if (std::error_code EC = S.getError())
|
|
return EC;
|
|
Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
|
|
break;
|
|
}
|
|
default: {
|
|
ErrorOr<ELFYAML::RawContentSection *> S = dumpContentSection(&Sec);
|
|
if (std::error_code EC = S.getError())
|
|
return EC;
|
|
Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (auto EC = dumpSymbols(Symtab, Y->Symbols))
|
|
return EC;
|
|
if (auto EC = dumpSymbols(DynSymtab, Y->DynamicSymbols))
|
|
return EC;
|
|
|
|
return Y.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
std::error_code
|
|
ELFDumper<ELFT>::dumpSymbols(const Elf_Shdr *Symtab,
|
|
std::vector<ELFYAML::Symbol> &Symbols) {
|
|
if (!Symtab)
|
|
return std::error_code();
|
|
|
|
auto StrTableOrErr = Obj.getStringTableForSymtab(*Symtab);
|
|
if (!StrTableOrErr)
|
|
return errorToErrorCode(StrTableOrErr.takeError());
|
|
StringRef StrTable = *StrTableOrErr;
|
|
|
|
auto SymtabOrErr = Obj.symbols(Symtab);
|
|
if (!SymtabOrErr)
|
|
return errorToErrorCode(SymtabOrErr.takeError());
|
|
|
|
for (const auto &Sym : (*SymtabOrErr).drop_front()) {
|
|
ELFYAML::Symbol S;
|
|
if (auto EC = dumpSymbol(&Sym, Symtab, StrTable, S))
|
|
return EC;
|
|
Symbols.push_back(S);
|
|
}
|
|
|
|
return std::error_code();
|
|
}
|
|
|
|
template <class ELFT>
|
|
std::error_code
|
|
ELFDumper<ELFT>::dumpSymbol(const Elf_Sym *Sym, const Elf_Shdr *SymTab,
|
|
StringRef StrTable, ELFYAML::Symbol &S) {
|
|
S.Type = Sym->getType();
|
|
S.Value = Sym->st_value;
|
|
S.Size = Sym->st_size;
|
|
S.Other = Sym->st_other;
|
|
S.Binding = Sym->getBinding();
|
|
|
|
Expected<StringRef> SymbolNameOrErr = getSymbolName(Sym, StrTable, SymTab);
|
|
if (!SymbolNameOrErr)
|
|
return errorToErrorCode(SymbolNameOrErr.takeError());
|
|
S.Name = SymbolNameOrErr.get();
|
|
|
|
if (Sym->st_shndx >= ELF::SHN_LORESERVE) {
|
|
if (Sym->st_shndx == ELF::SHN_XINDEX)
|
|
return obj2yaml_error::not_implemented;
|
|
S.Index = (ELFYAML::ELF_SHN)Sym->st_shndx;
|
|
return obj2yaml_error::success;
|
|
}
|
|
|
|
auto ShdrOrErr = Obj.getSection(Sym, SymTab, ShndxTable);
|
|
if (!ShdrOrErr)
|
|
return errorToErrorCode(ShdrOrErr.takeError());
|
|
const Elf_Shdr *Shdr = *ShdrOrErr;
|
|
if (!Shdr)
|
|
return obj2yaml_error::success;
|
|
|
|
auto NameOrErr = getUniquedSectionName(Shdr);
|
|
if (!NameOrErr)
|
|
return errorToErrorCode(NameOrErr.takeError());
|
|
S.Section = NameOrErr.get();
|
|
|
|
return obj2yaml_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
template <class RelT>
|
|
std::error_code ELFDumper<ELFT>::dumpRelocation(const RelT *Rel,
|
|
const Elf_Shdr *SymTab,
|
|
ELFYAML::Relocation &R) {
|
|
R.Type = Rel->getType(Obj.isMips64EL());
|
|
R.Offset = Rel->r_offset;
|
|
R.Addend = 0;
|
|
|
|
auto SymOrErr = Obj.getRelocationSymbol(Rel, SymTab);
|
|
if (!SymOrErr)
|
|
return errorToErrorCode(SymOrErr.takeError());
|
|
const Elf_Sym *Sym = *SymOrErr;
|
|
auto StrTabSec = Obj.getSection(SymTab->sh_link);
|
|
if (!StrTabSec)
|
|
return errorToErrorCode(StrTabSec.takeError());
|
|
auto StrTabOrErr = Obj.getStringTable(*StrTabSec);
|
|
if (!StrTabOrErr)
|
|
return errorToErrorCode(StrTabOrErr.takeError());
|
|
StringRef StrTab = *StrTabOrErr;
|
|
|
|
if (Sym) {
|
|
Expected<StringRef> NameOrErr = getSymbolName(Sym, StrTab, SymTab);
|
|
if (!NameOrErr)
|
|
return errorToErrorCode(NameOrErr.takeError());
|
|
R.Symbol = NameOrErr.get();
|
|
} else {
|
|
// We have some edge cases of relocations without a symbol associated,
|
|
// e.g. an object containing the invalid (according to the System V
|
|
// ABI) R_X86_64_NONE reloc. Create a symbol with an empty name instead
|
|
// of crashing.
|
|
R.Symbol = "";
|
|
}
|
|
|
|
return obj2yaml_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
std::error_code ELFDumper<ELFT>::dumpCommonSection(const Elf_Shdr *Shdr,
|
|
ELFYAML::Section &S) {
|
|
S.Type = Shdr->sh_type;
|
|
S.Flags = Shdr->sh_flags;
|
|
S.Address = Shdr->sh_addr;
|
|
S.AddressAlign = Shdr->sh_addralign;
|
|
if (Shdr->sh_entsize)
|
|
S.EntSize = static_cast<llvm::yaml::Hex64>(Shdr->sh_entsize);
|
|
|
|
auto NameOrErr = getUniquedSectionName(Shdr);
|
|
if (!NameOrErr)
|
|
return errorToErrorCode(NameOrErr.takeError());
|
|
S.Name = NameOrErr.get();
|
|
|
|
if (Shdr->sh_link != ELF::SHN_UNDEF) {
|
|
auto LinkSection = Obj.getSection(Shdr->sh_link);
|
|
if (LinkSection.takeError())
|
|
return errorToErrorCode(LinkSection.takeError());
|
|
NameOrErr = getUniquedSectionName(*LinkSection);
|
|
if (!NameOrErr)
|
|
return errorToErrorCode(NameOrErr.takeError());
|
|
S.Link = NameOrErr.get();
|
|
}
|
|
|
|
return obj2yaml_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
std::error_code
|
|
ELFDumper<ELFT>::dumpCommonRelocationSection(const Elf_Shdr *Shdr,
|
|
ELFYAML::RelocationSection &S) {
|
|
if (std::error_code EC = dumpCommonSection(Shdr, S))
|
|
return EC;
|
|
|
|
auto InfoSection = Obj.getSection(Shdr->sh_info);
|
|
if (!InfoSection)
|
|
return errorToErrorCode(InfoSection.takeError());
|
|
|
|
auto NameOrErr = getUniquedSectionName(*InfoSection);
|
|
if (!NameOrErr)
|
|
return errorToErrorCode(NameOrErr.takeError());
|
|
S.RelocatableSec = NameOrErr.get();
|
|
|
|
return obj2yaml_error::success;
|
|
}
|
|
|
|
template <class ELFT>
|
|
ErrorOr<ELFYAML::DynamicSection *>
|
|
ELFDumper<ELFT>::dumpDynamicSection(const Elf_Shdr *Shdr) {
|
|
auto S = make_unique<ELFYAML::DynamicSection>();
|
|
if (std::error_code EC = dumpCommonSection(Shdr, *S))
|
|
return EC;
|
|
|
|
auto DynTagsOrErr = Obj.template getSectionContentsAsArray<Elf_Dyn>(Shdr);
|
|
if (!DynTagsOrErr)
|
|
return errorToErrorCode(DynTagsOrErr.takeError());
|
|
|
|
for (const Elf_Dyn &Dyn : *DynTagsOrErr)
|
|
S->Entries.push_back({(ELFYAML::ELF_DYNTAG)Dyn.getTag(), Dyn.getVal()});
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
ErrorOr<ELFYAML::RelocationSection *>
|
|
ELFDumper<ELFT>::dumpRelocSection(const Elf_Shdr *Shdr) {
|
|
auto S = make_unique<ELFYAML::RelocationSection>();
|
|
if (std::error_code EC = dumpCommonRelocationSection(Shdr, *S))
|
|
return EC;
|
|
|
|
auto SymTabOrErr = Obj.getSection(Shdr->sh_link);
|
|
if (!SymTabOrErr)
|
|
return errorToErrorCode(SymTabOrErr.takeError());
|
|
const Elf_Shdr *SymTab = *SymTabOrErr;
|
|
|
|
if (Shdr->sh_type == ELF::SHT_REL) {
|
|
auto Rels = Obj.rels(Shdr);
|
|
if (!Rels)
|
|
return errorToErrorCode(Rels.takeError());
|
|
for (const Elf_Rel &Rel : *Rels) {
|
|
ELFYAML::Relocation R;
|
|
if (std::error_code EC = dumpRelocation(&Rel, SymTab, R))
|
|
return EC;
|
|
S->Relocations.push_back(R);
|
|
}
|
|
} else {
|
|
auto Rels = Obj.relas(Shdr);
|
|
if (!Rels)
|
|
return errorToErrorCode(Rels.takeError());
|
|
for (const Elf_Rela &Rel : *Rels) {
|
|
ELFYAML::Relocation R;
|
|
if (std::error_code EC = dumpRelocation(&Rel, SymTab, R))
|
|
return EC;
|
|
R.Addend = Rel.r_addend;
|
|
S->Relocations.push_back(R);
|
|
}
|
|
}
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
ErrorOr<ELFYAML::RawContentSection *>
|
|
ELFDumper<ELFT>::dumpContentSection(const Elf_Shdr *Shdr) {
|
|
auto S = make_unique<ELFYAML::RawContentSection>();
|
|
|
|
if (std::error_code EC = dumpCommonSection(Shdr, *S))
|
|
return EC;
|
|
|
|
auto ContentOrErr = Obj.getSectionContents(Shdr);
|
|
if (!ContentOrErr)
|
|
return errorToErrorCode(ContentOrErr.takeError());
|
|
S->Content = yaml::BinaryRef(ContentOrErr.get());
|
|
S->Size = S->Content.binary_size();
|
|
S->Info = Shdr->sh_info;
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
ErrorOr<ELFYAML::NoBitsSection *>
|
|
ELFDumper<ELFT>::dumpNoBitsSection(const Elf_Shdr *Shdr) {
|
|
auto S = make_unique<ELFYAML::NoBitsSection>();
|
|
|
|
if (std::error_code EC = dumpCommonSection(Shdr, *S))
|
|
return EC;
|
|
S->Size = Shdr->sh_size;
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
ErrorOr<ELFYAML::VerdefSection *>
|
|
ELFDumper<ELFT>::dumpVerdefSection(const Elf_Shdr *Shdr) {
|
|
typedef typename ELFT::Verdef Elf_Verdef;
|
|
typedef typename ELFT::Verdaux Elf_Verdaux;
|
|
|
|
auto S = make_unique<ELFYAML::VerdefSection>();
|
|
if (std::error_code EC = dumpCommonSection(Shdr, *S))
|
|
return EC;
|
|
|
|
S->Info = Shdr->sh_info;
|
|
|
|
auto StringTableShdrOrErr = Obj.getSection(Shdr->sh_link);
|
|
if (!StringTableShdrOrErr)
|
|
return errorToErrorCode(StringTableShdrOrErr.takeError());
|
|
|
|
auto StringTableOrErr = Obj.getStringTable(*StringTableShdrOrErr);
|
|
if (!StringTableOrErr)
|
|
return errorToErrorCode(StringTableOrErr.takeError());
|
|
|
|
auto Contents = Obj.getSectionContents(Shdr);
|
|
if (!Contents)
|
|
return errorToErrorCode(Contents.takeError());
|
|
|
|
llvm::ArrayRef<uint8_t> Data = *Contents;
|
|
const uint8_t *Buf = Data.data();
|
|
while (Buf) {
|
|
const Elf_Verdef *Verdef = reinterpret_cast<const Elf_Verdef *>(Buf);
|
|
ELFYAML::VerdefEntry Entry;
|
|
Entry.Version = Verdef->vd_version;
|
|
Entry.Flags = Verdef->vd_flags;
|
|
Entry.VersionNdx = Verdef->vd_ndx;
|
|
Entry.Hash = Verdef->vd_hash;
|
|
|
|
const uint8_t *BufAux = Buf + Verdef->vd_aux;
|
|
while (BufAux) {
|
|
const Elf_Verdaux *Verdaux =
|
|
reinterpret_cast<const Elf_Verdaux *>(BufAux);
|
|
Entry.VerNames.push_back(
|
|
StringTableOrErr->drop_front(Verdaux->vda_name).data());
|
|
BufAux = Verdaux->vda_next ? BufAux + Verdaux->vda_next : nullptr;
|
|
}
|
|
|
|
S->Entries.push_back(Entry);
|
|
Buf = Verdef->vd_next ? Buf + Verdef->vd_next : nullptr;
|
|
}
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
ErrorOr<ELFYAML::SymverSection *>
|
|
ELFDumper<ELFT>::dumpSymverSection(const Elf_Shdr *Shdr) {
|
|
typedef typename ELFT::Half Elf_Half;
|
|
|
|
auto S = make_unique<ELFYAML::SymverSection>();
|
|
if (std::error_code EC = dumpCommonSection(Shdr, *S))
|
|
return EC;
|
|
|
|
auto VersionsOrErr = Obj.template getSectionContentsAsArray<Elf_Half>(Shdr);
|
|
if (!VersionsOrErr)
|
|
return errorToErrorCode(VersionsOrErr.takeError());
|
|
for (const Elf_Half &E : *VersionsOrErr)
|
|
S->Entries.push_back(E);
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
ErrorOr<ELFYAML::VerneedSection *>
|
|
ELFDumper<ELFT>::dumpVerneedSection(const Elf_Shdr *Shdr) {
|
|
typedef typename ELFT::Verneed Elf_Verneed;
|
|
typedef typename ELFT::Vernaux Elf_Vernaux;
|
|
|
|
auto S = make_unique<ELFYAML::VerneedSection>();
|
|
if (std::error_code EC = dumpCommonSection(Shdr, *S))
|
|
return EC;
|
|
|
|
S->Info = Shdr->sh_info;
|
|
|
|
auto Contents = Obj.getSectionContents(Shdr);
|
|
if (!Contents)
|
|
return errorToErrorCode(Contents.takeError());
|
|
|
|
auto StringTableShdrOrErr = Obj.getSection(Shdr->sh_link);
|
|
if (!StringTableShdrOrErr)
|
|
return errorToErrorCode(StringTableShdrOrErr.takeError());
|
|
|
|
auto StringTableOrErr = Obj.getStringTable(*StringTableShdrOrErr);
|
|
if (!StringTableOrErr)
|
|
return errorToErrorCode(StringTableOrErr.takeError());
|
|
|
|
llvm::ArrayRef<uint8_t> Data = *Contents;
|
|
const uint8_t *Buf = Data.data();
|
|
while (Buf) {
|
|
const Elf_Verneed *Verneed = reinterpret_cast<const Elf_Verneed *>(Buf);
|
|
|
|
ELFYAML::VerneedEntry Entry;
|
|
Entry.Version = Verneed->vn_version;
|
|
Entry.File =
|
|
StringRef(StringTableOrErr->drop_front(Verneed->vn_file).data());
|
|
|
|
const uint8_t *BufAux = Buf + Verneed->vn_aux;
|
|
while (BufAux) {
|
|
const Elf_Vernaux *Vernaux =
|
|
reinterpret_cast<const Elf_Vernaux *>(BufAux);
|
|
|
|
ELFYAML::VernauxEntry Aux;
|
|
Aux.Hash = Vernaux->vna_hash;
|
|
Aux.Flags = Vernaux->vna_flags;
|
|
Aux.Other = Vernaux->vna_other;
|
|
Aux.Name =
|
|
StringRef(StringTableOrErr->drop_front(Vernaux->vna_name).data());
|
|
|
|
Entry.AuxV.push_back(Aux);
|
|
BufAux = Vernaux->vna_next ? BufAux + Vernaux->vna_next : nullptr;
|
|
}
|
|
|
|
S->VerneedV.push_back(Entry);
|
|
Buf = Verneed->vn_next ? Buf + Verneed->vn_next : nullptr;
|
|
}
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
ErrorOr<ELFYAML::Group *> ELFDumper<ELFT>::dumpGroup(const Elf_Shdr *Shdr) {
|
|
auto S = make_unique<ELFYAML::Group>();
|
|
|
|
if (std::error_code EC = dumpCommonSection(Shdr, *S))
|
|
return EC;
|
|
// Get sh_info which is the signature.
|
|
auto SymtabOrErr = Obj.getSection(Shdr->sh_link);
|
|
if (!SymtabOrErr)
|
|
return errorToErrorCode(SymtabOrErr.takeError());
|
|
const Elf_Shdr *Symtab = *SymtabOrErr;
|
|
auto SymOrErr = Obj.getSymbol(Symtab, Shdr->sh_info);
|
|
if (!SymOrErr)
|
|
return errorToErrorCode(SymOrErr.takeError());
|
|
const Elf_Sym *symbol = *SymOrErr;
|
|
auto StrTabOrErr = Obj.getStringTableForSymtab(*Symtab);
|
|
if (!StrTabOrErr)
|
|
return errorToErrorCode(StrTabOrErr.takeError());
|
|
StringRef StrTab = *StrTabOrErr;
|
|
auto sectionContents = Obj.getSectionContents(Shdr);
|
|
if (!sectionContents)
|
|
return errorToErrorCode(sectionContents.takeError());
|
|
Expected<StringRef> symbolName = getSymbolName(symbol, StrTab, Symtab);
|
|
if (!symbolName)
|
|
return errorToErrorCode(symbolName.takeError());
|
|
S->Signature = *symbolName;
|
|
const Elf_Word *groupMembers =
|
|
reinterpret_cast<const Elf_Word *>(sectionContents->data());
|
|
const long count = (Shdr->sh_size) / sizeof(Elf_Word);
|
|
ELFYAML::SectionOrType s;
|
|
for (int i = 0; i < count; i++) {
|
|
if (groupMembers[i] == llvm::ELF::GRP_COMDAT) {
|
|
s.sectionNameOrType = "GRP_COMDAT";
|
|
} else {
|
|
auto sHdr = Obj.getSection(groupMembers[i]);
|
|
if (!sHdr)
|
|
return errorToErrorCode(sHdr.takeError());
|
|
auto sectionName = getUniquedSectionName(*sHdr);
|
|
if (!sectionName)
|
|
return errorToErrorCode(sectionName.takeError());
|
|
s.sectionNameOrType = *sectionName;
|
|
}
|
|
S->Members.push_back(s);
|
|
}
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
ErrorOr<ELFYAML::MipsABIFlags *>
|
|
ELFDumper<ELFT>::dumpMipsABIFlags(const Elf_Shdr *Shdr) {
|
|
assert(Shdr->sh_type == ELF::SHT_MIPS_ABIFLAGS &&
|
|
"Section type is not SHT_MIPS_ABIFLAGS");
|
|
auto S = make_unique<ELFYAML::MipsABIFlags>();
|
|
if (std::error_code EC = dumpCommonSection(Shdr, *S))
|
|
return EC;
|
|
|
|
auto ContentOrErr = Obj.getSectionContents(Shdr);
|
|
if (!ContentOrErr)
|
|
return errorToErrorCode(ContentOrErr.takeError());
|
|
|
|
auto *Flags = reinterpret_cast<const object::Elf_Mips_ABIFlags<ELFT> *>(
|
|
ContentOrErr.get().data());
|
|
S->Version = Flags->version;
|
|
S->ISALevel = Flags->isa_level;
|
|
S->ISARevision = Flags->isa_rev;
|
|
S->GPRSize = Flags->gpr_size;
|
|
S->CPR1Size = Flags->cpr1_size;
|
|
S->CPR2Size = Flags->cpr2_size;
|
|
S->FpABI = Flags->fp_abi;
|
|
S->ISAExtension = Flags->isa_ext;
|
|
S->ASEs = Flags->ases;
|
|
S->Flags1 = Flags->flags1;
|
|
S->Flags2 = Flags->flags2;
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
static std::error_code elf2yaml(raw_ostream &Out,
|
|
const object::ELFFile<ELFT> &Obj) {
|
|
ELFDumper<ELFT> Dumper(Obj);
|
|
ErrorOr<ELFYAML::Object *> YAMLOrErr = Dumper.dump();
|
|
if (std::error_code EC = YAMLOrErr.getError())
|
|
return EC;
|
|
|
|
std::unique_ptr<ELFYAML::Object> YAML(YAMLOrErr.get());
|
|
yaml::Output Yout(Out);
|
|
Yout << *YAML;
|
|
|
|
return std::error_code();
|
|
}
|
|
|
|
std::error_code elf2yaml(raw_ostream &Out, const object::ObjectFile &Obj) {
|
|
if (const auto *ELFObj = dyn_cast<object::ELF32LEObjectFile>(&Obj))
|
|
return elf2yaml(Out, *ELFObj->getELFFile());
|
|
|
|
if (const auto *ELFObj = dyn_cast<object::ELF32BEObjectFile>(&Obj))
|
|
return elf2yaml(Out, *ELFObj->getELFFile());
|
|
|
|
if (const auto *ELFObj = dyn_cast<object::ELF64LEObjectFile>(&Obj))
|
|
return elf2yaml(Out, *ELFObj->getELFFile());
|
|
|
|
if (const auto *ELFObj = dyn_cast<object::ELF64BEObjectFile>(&Obj))
|
|
return elf2yaml(Out, *ELFObj->getELFFile());
|
|
|
|
return obj2yaml_error::unsupported_obj_file_format;
|
|
}
|