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69fe3b46f5
`struct Elf*_Shdr` has a field `sh_offset`, named `ShOffset` in llvm::ELFYAML::Section. Rename SHOffset (e_shoff) to SHOff to prevent confusion. Reviewed By: grimar Differential Revision: https://reviews.llvm.org/D67254 llvm-svn: 371185
786 lines
25 KiB
C++
786 lines
25 KiB
C++
//===------ utils/elf2yaml.cpp - obj2yaml conversion tool -------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "Error.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Object/ELFObjectFile.h"
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#include "llvm/ObjectYAML/ELFYAML.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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template <class ELFT>
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class ELFDumper {
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typedef object::Elf_Sym_Impl<ELFT> Elf_Sym;
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typedef typename ELFT::Dyn Elf_Dyn;
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typedef typename ELFT::Shdr Elf_Shdr;
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typedef typename ELFT::Word Elf_Word;
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typedef typename ELFT::Rel Elf_Rel;
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typedef typename ELFT::Rela Elf_Rela;
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ArrayRef<Elf_Shdr> Sections;
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ArrayRef<Elf_Sym> SymTable;
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DenseMap<StringRef, uint32_t> UsedSectionNames;
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std::vector<std::string> SectionNames;
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DenseMap<StringRef, uint32_t> UsedSymbolNames;
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std::vector<std::string> SymbolNames;
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Expected<StringRef> getUniquedSectionName(const Elf_Shdr *Sec);
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Expected<StringRef> getUniquedSymbolName(const Elf_Sym *Sym,
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StringRef StrTable,
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const Elf_Shdr *SymTab);
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const object::ELFFile<ELFT> &Obj;
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ArrayRef<Elf_Word> ShndxTable;
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Error dumpSymbols(const Elf_Shdr *Symtab,
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std::vector<ELFYAML::Symbol> &Symbols);
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Error dumpSymbol(const Elf_Sym *Sym, const Elf_Shdr *SymTab,
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StringRef StrTable, ELFYAML::Symbol &S);
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Error dumpCommonSection(const Elf_Shdr *Shdr, ELFYAML::Section &S);
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Error dumpCommonRelocationSection(const Elf_Shdr *Shdr,
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ELFYAML::RelocationSection &S);
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template <class RelT>
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Error dumpRelocation(const RelT *Rel, const Elf_Shdr *SymTab,
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ELFYAML::Relocation &R);
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Expected<ELFYAML::DynamicSection *> dumpDynamicSection(const Elf_Shdr *Shdr);
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Expected<ELFYAML::RelocationSection *> dumpRelocSection(const Elf_Shdr *Shdr);
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Expected<ELFYAML::RawContentSection *>
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dumpContentSection(const Elf_Shdr *Shdr);
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Expected<ELFYAML::SymtabShndxSection *>
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dumpSymtabShndxSection(const Elf_Shdr *Shdr);
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Expected<ELFYAML::NoBitsSection *> dumpNoBitsSection(const Elf_Shdr *Shdr);
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Expected<ELFYAML::VerdefSection *> dumpVerdefSection(const Elf_Shdr *Shdr);
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Expected<ELFYAML::SymverSection *> dumpSymverSection(const Elf_Shdr *Shdr);
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Expected<ELFYAML::VerneedSection *> dumpVerneedSection(const Elf_Shdr *Shdr);
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Expected<ELFYAML::Group *> dumpGroup(const Elf_Shdr *Shdr);
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Expected<ELFYAML::MipsABIFlags *> dumpMipsABIFlags(const Elf_Shdr *Shdr);
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public:
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ELFDumper(const object::ELFFile<ELFT> &O);
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Expected<ELFYAML::Object *> dump();
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};
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}
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template <class ELFT>
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ELFDumper<ELFT>::ELFDumper(const object::ELFFile<ELFT> &O)
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: Obj(O) {}
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template <class ELFT>
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Expected<StringRef>
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ELFDumper<ELFT>::getUniquedSectionName(const Elf_Shdr *Sec) {
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unsigned SecIndex = Sec - &Sections[0];
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assert(&Sections[SecIndex] == Sec);
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if (!SectionNames[SecIndex].empty())
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return SectionNames[SecIndex];
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auto NameOrErr = Obj.getSectionName(Sec);
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if (!NameOrErr)
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return NameOrErr;
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StringRef Name = *NameOrErr;
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std::string &Ret = SectionNames[SecIndex];
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auto It = UsedSectionNames.insert({Name, 0});
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if (!It.second)
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Ret = (Name + " [" + Twine(++It.first->second) + "]").str();
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else
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Ret = Name;
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return Ret;
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}
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template <class ELFT>
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Expected<StringRef>
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ELFDumper<ELFT>::getUniquedSymbolName(const Elf_Sym *Sym, StringRef StrTable,
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const Elf_Shdr *SymTab) {
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Expected<StringRef> SymbolNameOrErr = Sym->getName(StrTable);
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if (!SymbolNameOrErr)
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return SymbolNameOrErr;
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StringRef Name = *SymbolNameOrErr;
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if (Name.empty() && Sym->getType() == ELF::STT_SECTION) {
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auto ShdrOrErr = Obj.getSection(Sym, SymTab, ShndxTable);
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if (!ShdrOrErr)
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return ShdrOrErr.takeError();
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return getUniquedSectionName(*ShdrOrErr);
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}
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// Symbols in .symtab can have duplicate names. For example, it is a common
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// situation for local symbols in a relocatable object. Here we assign unique
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// suffixes for such symbols so that we can differentiate them.
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if (SymTab->sh_type == ELF::SHT_SYMTAB) {
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unsigned Index = Sym - SymTable.data();
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if (!SymbolNames[Index].empty())
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return SymbolNames[Index];
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auto It = UsedSymbolNames.insert({Name, 0});
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if (!It.second)
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SymbolNames[Index] =
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(Name + " [" + Twine(++It.first->second) + "]").str();
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else
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SymbolNames[Index] = Name;
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return SymbolNames[Index];
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}
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return Name;
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}
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template <class ELFT> Expected<ELFYAML::Object *> ELFDumper<ELFT>::dump() {
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auto Y = std::make_unique<ELFYAML::Object>();
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// Dump header. We do not dump SHEntSize, SHOff, SHNum and SHStrNdx fields.
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// When not explicitly set, the values are set by yaml2obj automatically
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// and there is no need to dump them here.
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Y->Header.Class = ELFYAML::ELF_ELFCLASS(Obj.getHeader()->getFileClass());
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Y->Header.Data = ELFYAML::ELF_ELFDATA(Obj.getHeader()->getDataEncoding());
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Y->Header.OSABI = Obj.getHeader()->e_ident[ELF::EI_OSABI];
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Y->Header.ABIVersion = Obj.getHeader()->e_ident[ELF::EI_ABIVERSION];
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Y->Header.Type = Obj.getHeader()->e_type;
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Y->Header.Machine = Obj.getHeader()->e_machine;
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Y->Header.Flags = Obj.getHeader()->e_flags;
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Y->Header.Entry = Obj.getHeader()->e_entry;
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// Dump sections
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auto SectionsOrErr = Obj.sections();
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if (!SectionsOrErr)
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return SectionsOrErr.takeError();
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Sections = *SectionsOrErr;
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SectionNames.resize(Sections.size());
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// Dump symbols. We need to do this early because other sections might want
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// to access the deduplicated symbol names that we also create here.
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const Elf_Shdr *SymTab = nullptr;
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const Elf_Shdr *SymTabShndx = nullptr;
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const Elf_Shdr *DynSymTab = nullptr;
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for (const Elf_Shdr &Sec : Sections) {
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if (Sec.sh_type == ELF::SHT_SYMTAB) {
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SymTab = &Sec;
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} else if (Sec.sh_type == ELF::SHT_DYNSYM) {
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DynSymTab = &Sec;
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} else if (Sec.sh_type == ELF::SHT_SYMTAB_SHNDX) {
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// ABI allows us to have one SHT_SYMTAB_SHNDX for each symbol table.
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// We only support having the SHT_SYMTAB_SHNDX for SHT_SYMTAB now.
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if (SymTabShndx)
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return createStringError(obj2yaml_error::not_implemented,
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"multiple SHT_SYMTAB_SHNDX sections are not supported");
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SymTabShndx = &Sec;
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}
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}
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// We need to locate the SHT_SYMTAB_SHNDX section early, because it might be
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// needed for dumping symbols.
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if (SymTabShndx) {
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if (!SymTab || SymTabShndx->sh_link != SymTab - Sections.begin())
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return createStringError(
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obj2yaml_error::not_implemented,
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"only SHT_SYMTAB_SHNDX associated with SHT_SYMTAB are supported");
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auto TableOrErr = Obj.getSHNDXTable(*SymTabShndx);
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if (!TableOrErr)
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return TableOrErr.takeError();
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ShndxTable = *TableOrErr;
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}
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if (SymTab)
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if (Error E = dumpSymbols(SymTab, Y->Symbols))
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return std::move(E);
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if (DynSymTab)
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if (Error E = dumpSymbols(DynSymTab, Y->DynamicSymbols))
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return std::move(E);
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for (const Elf_Shdr &Sec : Sections) {
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switch (Sec.sh_type) {
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case ELF::SHT_DYNAMIC: {
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Expected<ELFYAML::DynamicSection *> SecOrErr = dumpDynamicSection(&Sec);
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if (!SecOrErr)
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return SecOrErr.takeError();
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Y->Sections.emplace_back(*SecOrErr);
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break;
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}
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case ELF::SHT_STRTAB:
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case ELF::SHT_SYMTAB:
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case ELF::SHT_DYNSYM:
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// Do not dump these sections.
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break;
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case ELF::SHT_SYMTAB_SHNDX: {
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Expected<ELFYAML::SymtabShndxSection *> SecOrErr =
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dumpSymtabShndxSection(&Sec);
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if (!SecOrErr)
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return SecOrErr.takeError();
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Y->Sections.emplace_back(*SecOrErr);
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break;
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}
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case ELF::SHT_REL:
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case ELF::SHT_RELA: {
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Expected<ELFYAML::RelocationSection *> SecOrErr = dumpRelocSection(&Sec);
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if (!SecOrErr)
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return SecOrErr.takeError();
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Y->Sections.emplace_back(*SecOrErr);
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break;
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}
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case ELF::SHT_GROUP: {
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Expected<ELFYAML::Group *> GroupOrErr = dumpGroup(&Sec);
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if (!GroupOrErr)
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return GroupOrErr.takeError();
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Y->Sections.emplace_back(*GroupOrErr);
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break;
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}
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case ELF::SHT_MIPS_ABIFLAGS: {
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Expected<ELFYAML::MipsABIFlags *> SecOrErr = dumpMipsABIFlags(&Sec);
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if (!SecOrErr)
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return SecOrErr.takeError();
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Y->Sections.emplace_back(*SecOrErr);
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break;
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}
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case ELF::SHT_NOBITS: {
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Expected<ELFYAML::NoBitsSection *> SecOrErr = dumpNoBitsSection(&Sec);
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if (!SecOrErr)
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return SecOrErr.takeError();
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Y->Sections.emplace_back(*SecOrErr);
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break;
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}
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case ELF::SHT_GNU_verdef: {
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Expected<ELFYAML::VerdefSection *> SecOrErr = dumpVerdefSection(&Sec);
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if (!SecOrErr)
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return SecOrErr.takeError();
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Y->Sections.emplace_back(*SecOrErr);
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break;
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}
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case ELF::SHT_GNU_versym: {
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Expected<ELFYAML::SymverSection *> SecOrErr = dumpSymverSection(&Sec);
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if (!SecOrErr)
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return SecOrErr.takeError();
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Y->Sections.emplace_back(*SecOrErr);
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break;
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}
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case ELF::SHT_GNU_verneed: {
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Expected<ELFYAML::VerneedSection *> SecOrErr = dumpVerneedSection(&Sec);
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if (!SecOrErr)
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return SecOrErr.takeError();
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Y->Sections.emplace_back(*SecOrErr);
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break;
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}
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case ELF::SHT_NULL: {
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// We only dump the SHT_NULL section at index 0 when it
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// has at least one non-null field, because yaml2obj
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// normally creates the zero section at index 0 implicitly.
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if (&Sec == &Sections[0]) {
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const uint8_t *Begin = reinterpret_cast<const uint8_t *>(&Sec);
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const uint8_t *End = Begin + sizeof(Elf_Shdr);
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if (std::find_if(Begin, End, [](uint8_t V) { return V != 0; }) == End)
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break;
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}
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LLVM_FALLTHROUGH;
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}
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default: {
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Expected<ELFYAML::RawContentSection *> SecOrErr =
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dumpContentSection(&Sec);
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if (!SecOrErr)
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return SecOrErr.takeError();
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Y->Sections.emplace_back(*SecOrErr);
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}
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}
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}
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return Y.release();
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}
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template <class ELFT>
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Error ELFDumper<ELFT>::dumpSymbols(const Elf_Shdr *Symtab,
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std::vector<ELFYAML::Symbol> &Symbols) {
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if (!Symtab)
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return Error::success();
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auto StrTableOrErr = Obj.getStringTableForSymtab(*Symtab);
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if (!StrTableOrErr)
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return StrTableOrErr.takeError();
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StringRef StrTable = *StrTableOrErr;
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auto SymtabOrErr = Obj.symbols(Symtab);
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if (!SymtabOrErr)
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return SymtabOrErr.takeError();
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if (Symtab->sh_type == ELF::SHT_SYMTAB) {
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SymTable = *SymtabOrErr;
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SymbolNames.resize(SymTable.size());
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}
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for (const auto &Sym : (*SymtabOrErr).drop_front()) {
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ELFYAML::Symbol S;
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if (auto EC = dumpSymbol(&Sym, Symtab, StrTable, S))
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return EC;
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Symbols.push_back(S);
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}
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return Error::success();
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}
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template <class ELFT>
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Error ELFDumper<ELFT>::dumpSymbol(const Elf_Sym *Sym, const Elf_Shdr *SymTab,
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StringRef StrTable, ELFYAML::Symbol &S) {
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S.Type = Sym->getType();
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S.Value = Sym->st_value;
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S.Size = Sym->st_size;
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S.Other = Sym->st_other;
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S.Binding = Sym->getBinding();
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Expected<StringRef> SymbolNameOrErr =
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getUniquedSymbolName(Sym, StrTable, SymTab);
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if (!SymbolNameOrErr)
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return SymbolNameOrErr.takeError();
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S.Name = SymbolNameOrErr.get();
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if (Sym->st_shndx >= ELF::SHN_LORESERVE) {
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S.Index = (ELFYAML::ELF_SHN)Sym->st_shndx;
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return Error::success();
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}
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auto ShdrOrErr = Obj.getSection(Sym, SymTab, ShndxTable);
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if (!ShdrOrErr)
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return ShdrOrErr.takeError();
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const Elf_Shdr *Shdr = *ShdrOrErr;
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if (!Shdr)
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return Error::success();
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auto NameOrErr = getUniquedSectionName(Shdr);
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if (!NameOrErr)
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return NameOrErr.takeError();
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S.Section = NameOrErr.get();
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return Error::success();
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}
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template <class ELFT>
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template <class RelT>
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Error ELFDumper<ELFT>::dumpRelocation(const RelT *Rel, const Elf_Shdr *SymTab,
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ELFYAML::Relocation &R) {
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R.Type = Rel->getType(Obj.isMips64EL());
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R.Offset = Rel->r_offset;
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R.Addend = 0;
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auto SymOrErr = Obj.getRelocationSymbol(Rel, SymTab);
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if (!SymOrErr)
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return SymOrErr.takeError();
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const Elf_Sym *Sym = *SymOrErr;
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auto StrTabSec = Obj.getSection(SymTab->sh_link);
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if (!StrTabSec)
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return StrTabSec.takeError();
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auto StrTabOrErr = Obj.getStringTable(*StrTabSec);
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if (!StrTabOrErr)
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return StrTabOrErr.takeError();
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StringRef StrTab = *StrTabOrErr;
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if (Sym) {
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Expected<StringRef> NameOrErr = getUniquedSymbolName(Sym, StrTab, SymTab);
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if (!NameOrErr)
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return NameOrErr.takeError();
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R.Symbol = NameOrErr.get();
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} else {
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// We have some edge cases of relocations without a symbol associated,
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// e.g. an object containing the invalid (according to the System V
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// ABI) R_X86_64_NONE reloc. Create a symbol with an empty name instead
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// of crashing.
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R.Symbol = "";
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}
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return Error::success();
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}
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template <class ELFT>
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Error ELFDumper<ELFT>::dumpCommonSection(const Elf_Shdr *Shdr,
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ELFYAML::Section &S) {
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// Dump fields. We do not dump the ShOffset field. When not explicitly
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// set, the value is set by yaml2obj automatically.
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S.Type = Shdr->sh_type;
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if (Shdr->sh_flags)
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S.Flags = static_cast<ELFYAML::ELF_SHF>(Shdr->sh_flags);
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S.Address = Shdr->sh_addr;
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S.AddressAlign = Shdr->sh_addralign;
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if (Shdr->sh_entsize)
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S.EntSize = static_cast<llvm::yaml::Hex64>(Shdr->sh_entsize);
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auto NameOrErr = getUniquedSectionName(Shdr);
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if (!NameOrErr)
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return NameOrErr.takeError();
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S.Name = NameOrErr.get();
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if (Shdr->sh_link != ELF::SHN_UNDEF) {
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auto LinkSection = Obj.getSection(Shdr->sh_link);
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if (!LinkSection)
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return make_error<StringError>(
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"unable to resolve sh_link reference in section '" + S.Name +
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"': " + toString(LinkSection.takeError()),
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inconvertibleErrorCode());
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NameOrErr = getUniquedSectionName(*LinkSection);
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if (!NameOrErr)
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return NameOrErr.takeError();
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S.Link = NameOrErr.get();
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}
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return Error::success();
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}
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template <class ELFT>
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Error ELFDumper<ELFT>::dumpCommonRelocationSection(
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const Elf_Shdr *Shdr, ELFYAML::RelocationSection &S) {
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if (Error E = dumpCommonSection(Shdr, S))
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return E;
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auto InfoSection = Obj.getSection(Shdr->sh_info);
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if (!InfoSection)
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return InfoSection.takeError();
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auto NameOrErr = getUniquedSectionName(*InfoSection);
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if (!NameOrErr)
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return NameOrErr.takeError();
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S.RelocatableSec = NameOrErr.get();
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return Error::success();
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}
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template <class ELFT>
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Expected<ELFYAML::DynamicSection *>
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ELFDumper<ELFT>::dumpDynamicSection(const Elf_Shdr *Shdr) {
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auto S = std::make_unique<ELFYAML::DynamicSection>();
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if (Error E = dumpCommonSection(Shdr, *S))
|
|
return std::move(E);
|
|
|
|
auto DynTagsOrErr = Obj.template getSectionContentsAsArray<Elf_Dyn>(Shdr);
|
|
if (!DynTagsOrErr)
|
|
return 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>
|
|
Expected<ELFYAML::RelocationSection *>
|
|
ELFDumper<ELFT>::dumpRelocSection(const Elf_Shdr *Shdr) {
|
|
auto S = std::make_unique<ELFYAML::RelocationSection>();
|
|
if (auto E = dumpCommonRelocationSection(Shdr, *S))
|
|
return std::move(E);
|
|
|
|
auto SymTabOrErr = Obj.getSection(Shdr->sh_link);
|
|
if (!SymTabOrErr)
|
|
return SymTabOrErr.takeError();
|
|
const Elf_Shdr *SymTab = *SymTabOrErr;
|
|
|
|
if (Shdr->sh_type == ELF::SHT_REL) {
|
|
auto Rels = Obj.rels(Shdr);
|
|
if (!Rels)
|
|
return Rels.takeError();
|
|
for (const Elf_Rel &Rel : *Rels) {
|
|
ELFYAML::Relocation R;
|
|
if (Error E = dumpRelocation(&Rel, SymTab, R))
|
|
return std::move(E);
|
|
S->Relocations.push_back(R);
|
|
}
|
|
} else {
|
|
auto Rels = Obj.relas(Shdr);
|
|
if (!Rels)
|
|
return Rels.takeError();
|
|
for (const Elf_Rela &Rel : *Rels) {
|
|
ELFYAML::Relocation R;
|
|
if (Error E = dumpRelocation(&Rel, SymTab, R))
|
|
return std::move(E);
|
|
R.Addend = Rel.r_addend;
|
|
S->Relocations.push_back(R);
|
|
}
|
|
}
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
Expected<ELFYAML::RawContentSection *>
|
|
ELFDumper<ELFT>::dumpContentSection(const Elf_Shdr *Shdr) {
|
|
auto S = std::make_unique<ELFYAML::RawContentSection>();
|
|
if (Error E = dumpCommonSection(Shdr, *S))
|
|
return std::move(E);
|
|
|
|
unsigned SecIndex = Shdr - &Sections[0];
|
|
if (SecIndex != 0 || Shdr->sh_type != ELF::SHT_NULL) {
|
|
auto ContentOrErr = Obj.getSectionContents(Shdr);
|
|
if (!ContentOrErr)
|
|
return ContentOrErr.takeError();
|
|
ArrayRef<uint8_t> Content = *ContentOrErr;
|
|
if (!Content.empty())
|
|
S->Content = yaml::BinaryRef(Content);
|
|
} else {
|
|
S->Size = static_cast<llvm::yaml::Hex64>(Shdr->sh_size);
|
|
}
|
|
|
|
if (Shdr->sh_info)
|
|
S->Info = static_cast<llvm::yaml::Hex64>(Shdr->sh_info);
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
Expected<ELFYAML::SymtabShndxSection *>
|
|
ELFDumper<ELFT>::dumpSymtabShndxSection(const Elf_Shdr *Shdr) {
|
|
auto S = std::make_unique<ELFYAML::SymtabShndxSection>();
|
|
if (Error E = dumpCommonSection(Shdr, *S))
|
|
return std::move(E);
|
|
|
|
auto EntriesOrErr = Obj.template getSectionContentsAsArray<Elf_Word>(Shdr);
|
|
if (!EntriesOrErr)
|
|
return EntriesOrErr.takeError();
|
|
for (const Elf_Word &E : *EntriesOrErr)
|
|
S->Entries.push_back(E);
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
Expected<ELFYAML::NoBitsSection *>
|
|
ELFDumper<ELFT>::dumpNoBitsSection(const Elf_Shdr *Shdr) {
|
|
auto S = std::make_unique<ELFYAML::NoBitsSection>();
|
|
if (Error E = dumpCommonSection(Shdr, *S))
|
|
return std::move(E);
|
|
S->Size = Shdr->sh_size;
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
Expected<ELFYAML::VerdefSection *>
|
|
ELFDumper<ELFT>::dumpVerdefSection(const Elf_Shdr *Shdr) {
|
|
typedef typename ELFT::Verdef Elf_Verdef;
|
|
typedef typename ELFT::Verdaux Elf_Verdaux;
|
|
|
|
auto S = std::make_unique<ELFYAML::VerdefSection>();
|
|
if (Error E = dumpCommonSection(Shdr, *S))
|
|
return std::move(E);
|
|
|
|
S->Info = Shdr->sh_info;
|
|
|
|
auto StringTableShdrOrErr = Obj.getSection(Shdr->sh_link);
|
|
if (!StringTableShdrOrErr)
|
|
return StringTableShdrOrErr.takeError();
|
|
|
|
auto StringTableOrErr = Obj.getStringTable(*StringTableShdrOrErr);
|
|
if (!StringTableOrErr)
|
|
return StringTableOrErr.takeError();
|
|
|
|
auto Contents = Obj.getSectionContents(Shdr);
|
|
if (!Contents)
|
|
return 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>
|
|
Expected<ELFYAML::SymverSection *>
|
|
ELFDumper<ELFT>::dumpSymverSection(const Elf_Shdr *Shdr) {
|
|
typedef typename ELFT::Half Elf_Half;
|
|
|
|
auto S = std::make_unique<ELFYAML::SymverSection>();
|
|
if (Error E = dumpCommonSection(Shdr, *S))
|
|
return std::move(E);
|
|
|
|
auto VersionsOrErr = Obj.template getSectionContentsAsArray<Elf_Half>(Shdr);
|
|
if (!VersionsOrErr)
|
|
return VersionsOrErr.takeError();
|
|
for (const Elf_Half &E : *VersionsOrErr)
|
|
S->Entries.push_back(E);
|
|
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
Expected<ELFYAML::VerneedSection *>
|
|
ELFDumper<ELFT>::dumpVerneedSection(const Elf_Shdr *Shdr) {
|
|
typedef typename ELFT::Verneed Elf_Verneed;
|
|
typedef typename ELFT::Vernaux Elf_Vernaux;
|
|
|
|
auto S = std::make_unique<ELFYAML::VerneedSection>();
|
|
if (Error E = dumpCommonSection(Shdr, *S))
|
|
return std::move(E);
|
|
|
|
S->Info = Shdr->sh_info;
|
|
|
|
auto Contents = Obj.getSectionContents(Shdr);
|
|
if (!Contents)
|
|
return Contents.takeError();
|
|
|
|
auto StringTableShdrOrErr = Obj.getSection(Shdr->sh_link);
|
|
if (!StringTableShdrOrErr)
|
|
return StringTableShdrOrErr.takeError();
|
|
|
|
auto StringTableOrErr = Obj.getStringTable(*StringTableShdrOrErr);
|
|
if (!StringTableOrErr)
|
|
return 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>
|
|
Expected<ELFYAML::Group *> ELFDumper<ELFT>::dumpGroup(const Elf_Shdr *Shdr) {
|
|
auto S = std::make_unique<ELFYAML::Group>();
|
|
if (Error E = dumpCommonSection(Shdr, *S))
|
|
return std::move(E);
|
|
|
|
auto SymtabOrErr = Obj.getSection(Shdr->sh_link);
|
|
if (!SymtabOrErr)
|
|
return SymtabOrErr.takeError();
|
|
// Get symbol with index sh_info which name is the signature of the group.
|
|
const Elf_Shdr *Symtab = *SymtabOrErr;
|
|
auto SymOrErr = Obj.getSymbol(Symtab, Shdr->sh_info);
|
|
if (!SymOrErr)
|
|
return SymOrErr.takeError();
|
|
auto StrTabOrErr = Obj.getStringTableForSymtab(*Symtab);
|
|
if (!StrTabOrErr)
|
|
return StrTabOrErr.takeError();
|
|
|
|
Expected<StringRef> SymbolName =
|
|
getUniquedSymbolName(*SymOrErr, *StrTabOrErr, Symtab);
|
|
if (!SymbolName)
|
|
return SymbolName.takeError();
|
|
S->Signature = *SymbolName;
|
|
|
|
auto MembersOrErr = Obj.template getSectionContentsAsArray<Elf_Word>(Shdr);
|
|
if (!MembersOrErr)
|
|
return MembersOrErr.takeError();
|
|
|
|
for (Elf_Word Member : *MembersOrErr) {
|
|
if (Member == llvm::ELF::GRP_COMDAT) {
|
|
S->Members.push_back({"GRP_COMDAT"});
|
|
continue;
|
|
}
|
|
|
|
auto SHdrOrErr = Obj.getSection(Member);
|
|
if (!SHdrOrErr)
|
|
return SHdrOrErr.takeError();
|
|
auto NameOrErr = getUniquedSectionName(*SHdrOrErr);
|
|
if (!NameOrErr)
|
|
return NameOrErr.takeError();
|
|
S->Members.push_back({*NameOrErr});
|
|
}
|
|
return S.release();
|
|
}
|
|
|
|
template <class ELFT>
|
|
Expected<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 = std::make_unique<ELFYAML::MipsABIFlags>();
|
|
if (Error E = dumpCommonSection(Shdr, *S))
|
|
return std::move(E);
|
|
|
|
auto ContentOrErr = Obj.getSectionContents(Shdr);
|
|
if (!ContentOrErr)
|
|
return 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 Error elf2yaml(raw_ostream &Out, const object::ELFFile<ELFT> &Obj) {
|
|
ELFDumper<ELFT> Dumper(Obj);
|
|
Expected<ELFYAML::Object *> YAMLOrErr = Dumper.dump();
|
|
if (!YAMLOrErr)
|
|
return YAMLOrErr.takeError();
|
|
|
|
std::unique_ptr<ELFYAML::Object> YAML(YAMLOrErr.get());
|
|
yaml::Output Yout(Out);
|
|
Yout << *YAML;
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
Error 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());
|
|
|
|
llvm_unreachable("unknown ELF file format");
|
|
}
|