6da44ad75d
Currently, YAML has the following syntax for describing the symbols:
Symbols:
Local:
LocalSymbol1:
...
LocalSymbol2:
...
...
Global:
GlobalSymbol1:
...
Weak:
...
GNUUnique:
I.e. symbols are grouped by their bindings. That is not very convenient,
because:
It does not allow to set a custom binding, what can be useful for producing
broken/special outputs for test cases. Adding a new binding would require to
change a syntax (what we observed when added GNUUnique recently).
It does not allow to change the order of the symbols in .symtab/.dynsym,
i.e. currently all Local symbols are placed first, then Global, Weak and GNUUnique
are following, but we are not able to change the order.
It is not consistent. Binding is just one of the properties of the symbol,
we do not group them by other properties.
It makes the code more complex that it can be. This patch shows it can be simplified
with the change performed.
The patch changes the syntax to just:
Symbols:
Symbol1:
...
Symbol2:
...
...
With that, we are able to work with the binding field just like with any other symbol property.
Differential revision: https://reviews.llvm.org/D60122
llvm-svn: 357595
691 lines
22 KiB
C++
691 lines
22 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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// If the file has multiple sections with the same name, we add a
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// suffix to make them unique.
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unsigned Suffix = 0;
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DenseSet<StringRef> UsedSectionNames;
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std::vector<std::string> SectionNames;
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Expected<StringRef> getUniquedSectionName(const Elf_Shdr *Sec);
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Expected<StringRef> getSymbolName(const Elf_Sym *Sym, 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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std::error_code dumpSymbols(const Elf_Shdr *Symtab,
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std::vector<ELFYAML::Symbol> &Symbols);
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std::error_code dumpSymbol(const Elf_Sym *Sym, const Elf_Shdr *SymTab,
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StringRef StrTable, ELFYAML::Symbol &S);
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std::error_code dumpCommonSection(const Elf_Shdr *Shdr, ELFYAML::Section &S);
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std::error_code dumpCommonRelocationSection(const Elf_Shdr *Shdr,
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ELFYAML::RelocationSection &S);
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template <class RelT>
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std::error_code dumpRelocation(const RelT *Rel, const Elf_Shdr *SymTab,
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ELFYAML::Relocation &R);
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ErrorOr<ELFYAML::DynamicSection *> dumpDynamicSection(const Elf_Shdr *Shdr);
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ErrorOr<ELFYAML::RelocationSection *> dumpRelocSection(const Elf_Shdr *Shdr);
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ErrorOr<ELFYAML::RawContentSection *>
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dumpContentSection(const Elf_Shdr *Shdr);
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ErrorOr<ELFYAML::NoBitsSection *> dumpNoBitsSection(const Elf_Shdr *Shdr);
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ErrorOr<ELFYAML::VerdefSection *> dumpVerdefSection(const Elf_Shdr *Shdr);
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ErrorOr<ELFYAML::SymverSection *> dumpSymverSection(const Elf_Shdr *Shdr);
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ErrorOr<ELFYAML::VerneedSection *> dumpVerneedSection(const Elf_Shdr *Shdr);
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ErrorOr<ELFYAML::Group *> dumpGroup(const Elf_Shdr *Shdr);
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ErrorOr<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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ErrorOr<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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Ret = Name;
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while (!UsedSectionNames.insert(Ret).second)
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Ret = (Name + to_string(++Suffix)).str();
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return Ret;
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}
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template <class ELFT>
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Expected<StringRef> ELFDumper<ELFT>::getSymbolName(const Elf_Sym *Sym,
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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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return Name;
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}
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template <class ELFT> ErrorOr<ELFYAML::Object *> ELFDumper<ELFT>::dump() {
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auto Y = make_unique<ELFYAML::Object>();
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// Dump header
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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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const Elf_Shdr *Symtab = nullptr;
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const Elf_Shdr *DynSymtab = nullptr;
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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 errorToErrorCode(SectionsOrErr.takeError());
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Sections = *SectionsOrErr;
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SectionNames.resize(Sections.size());
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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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ErrorOr<ELFYAML::DynamicSection *> S = dumpDynamicSection(&Sec);
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if (std::error_code EC = S.getError())
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return EC;
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Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
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break;
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}
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case ELF::SHT_NULL:
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case ELF::SHT_STRTAB:
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// Do not dump these sections.
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break;
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case ELF::SHT_SYMTAB:
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Symtab = &Sec;
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break;
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case ELF::SHT_DYNSYM:
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DynSymtab = &Sec;
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break;
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case ELF::SHT_SYMTAB_SHNDX: {
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auto TableOrErr = Obj.getSHNDXTable(Sec);
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if (!TableOrErr)
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return errorToErrorCode(TableOrErr.takeError());
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ShndxTable = *TableOrErr;
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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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ErrorOr<ELFYAML::RelocationSection *> S = dumpRelocSection(&Sec);
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if (std::error_code EC = S.getError())
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return EC;
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Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
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break;
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}
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case ELF::SHT_GROUP: {
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ErrorOr<ELFYAML::Group *> G = dumpGroup(&Sec);
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if (std::error_code EC = G.getError())
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return EC;
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Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(G.get()));
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break;
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}
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case ELF::SHT_MIPS_ABIFLAGS: {
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ErrorOr<ELFYAML::MipsABIFlags *> G = dumpMipsABIFlags(&Sec);
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if (std::error_code EC = G.getError())
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return EC;
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Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(G.get()));
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break;
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}
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case ELF::SHT_NOBITS: {
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ErrorOr<ELFYAML::NoBitsSection *> S = dumpNoBitsSection(&Sec);
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if (std::error_code EC = S.getError())
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return EC;
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Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
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break;
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}
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case ELF::SHT_GNU_verdef: {
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ErrorOr<ELFYAML::VerdefSection *> S = dumpVerdefSection(&Sec);
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if (std::error_code EC = S.getError())
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return EC;
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Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
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break;
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}
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case ELF::SHT_GNU_versym: {
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ErrorOr<ELFYAML::SymverSection *> S = dumpSymverSection(&Sec);
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if (std::error_code EC = S.getError())
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return EC;
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Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
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break;
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}
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case ELF::SHT_GNU_verneed: {
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ErrorOr<ELFYAML::VerneedSection *> S = dumpVerneedSection(&Sec);
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if (std::error_code EC = S.getError())
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return EC;
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Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
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break;
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}
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default: {
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ErrorOr<ELFYAML::RawContentSection *> S = dumpContentSection(&Sec);
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if (std::error_code EC = S.getError())
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return EC;
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Y->Sections.push_back(std::unique_ptr<ELFYAML::Section>(S.get()));
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}
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}
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}
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if (auto EC = dumpSymbols(Symtab, Y->Symbols))
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return EC;
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if (auto EC = dumpSymbols(DynSymtab, Y->DynamicSymbols))
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return EC;
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return Y.release();
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}
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template <class ELFT>
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std::error_code
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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 std::error_code();
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auto StrTableOrErr = Obj.getStringTableForSymtab(*Symtab);
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if (!StrTableOrErr)
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return errorToErrorCode(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 errorToErrorCode(SymtabOrErr.takeError());
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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 std::error_code();
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}
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template <class ELFT>
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std::error_code
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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 = getSymbolName(Sym, StrTable, SymTab);
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if (!SymbolNameOrErr)
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return errorToErrorCode(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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if (Sym->st_shndx == ELF::SHN_XINDEX)
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return obj2yaml_error::not_implemented;
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S.Index = (ELFYAML::ELF_SHN)Sym->st_shndx;
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return obj2yaml_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 errorToErrorCode(ShdrOrErr.takeError());
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const Elf_Shdr *Shdr = *ShdrOrErr;
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if (!Shdr)
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return obj2yaml_error::success;
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auto NameOrErr = getUniquedSectionName(Shdr);
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if (!NameOrErr)
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return errorToErrorCode(NameOrErr.takeError());
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S.Section = NameOrErr.get();
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return obj2yaml_error::success;
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}
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template <class ELFT>
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template <class RelT>
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std::error_code ELFDumper<ELFT>::dumpRelocation(const RelT *Rel,
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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 errorToErrorCode(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 errorToErrorCode(StrTabSec.takeError());
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auto StrTabOrErr = Obj.getStringTable(*StrTabSec);
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if (!StrTabOrErr)
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return errorToErrorCode(StrTabOrErr.takeError());
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StringRef StrTab = *StrTabOrErr;
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if (Sym) {
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Expected<StringRef> NameOrErr = getSymbolName(Sym, StrTab, SymTab);
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if (!NameOrErr)
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return errorToErrorCode(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 obj2yaml_error::success;
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}
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template <class ELFT>
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std::error_code ELFDumper<ELFT>::dumpCommonSection(const Elf_Shdr *Shdr,
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ELFYAML::Section &S) {
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S.Type = Shdr->sh_type;
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S.Flags = 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 errorToErrorCode(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.takeError())
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return errorToErrorCode(LinkSection.takeError());
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NameOrErr = getUniquedSectionName(*LinkSection);
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if (!NameOrErr)
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return errorToErrorCode(NameOrErr.takeError());
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S.Link = NameOrErr.get();
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}
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return obj2yaml_error::success;
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}
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template <class ELFT>
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std::error_code
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ELFDumper<ELFT>::dumpCommonRelocationSection(const Elf_Shdr *Shdr,
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ELFYAML::RelocationSection &S) {
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if (std::error_code EC = dumpCommonSection(Shdr, S))
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return EC;
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auto InfoSection = Obj.getSection(Shdr->sh_info);
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if (!InfoSection)
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return errorToErrorCode(InfoSection.takeError());
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auto NameOrErr = getUniquedSectionName(*InfoSection);
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if (!NameOrErr)
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return errorToErrorCode(NameOrErr.takeError());
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S.RelocatableSec = NameOrErr.get();
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return obj2yaml_error::success;
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}
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template <class ELFT>
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ErrorOr<ELFYAML::DynamicSection *>
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ELFDumper<ELFT>::dumpDynamicSection(const Elf_Shdr *Shdr) {
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auto S = make_unique<ELFYAML::DynamicSection>();
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if (std::error_code EC = dumpCommonSection(Shdr, *S))
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return EC;
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auto DynTagsOrErr = Obj.template getSectionContentsAsArray<Elf_Dyn>(Shdr);
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if (!DynTagsOrErr)
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return errorToErrorCode(DynTagsOrErr.takeError());
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for (const Elf_Dyn &Dyn : *DynTagsOrErr)
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S->Entries.push_back({(ELFYAML::ELF_DYNTAG)Dyn.getTag(), Dyn.getVal()});
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return S.release();
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}
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template <class ELFT>
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ErrorOr<ELFYAML::RelocationSection *>
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ELFDumper<ELFT>::dumpRelocSection(const Elf_Shdr *Shdr) {
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auto S = make_unique<ELFYAML::RelocationSection>();
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if (std::error_code EC = dumpCommonRelocationSection(Shdr, *S))
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return EC;
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auto SymTabOrErr = Obj.getSection(Shdr->sh_link);
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if (!SymTabOrErr)
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return errorToErrorCode(SymTabOrErr.takeError());
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const Elf_Shdr *SymTab = *SymTabOrErr;
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if (Shdr->sh_type == ELF::SHT_REL) {
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auto Rels = Obj.rels(Shdr);
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if (!Rels)
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return errorToErrorCode(Rels.takeError());
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for (const Elf_Rel &Rel : *Rels) {
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ELFYAML::Relocation R;
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if (std::error_code EC = dumpRelocation(&Rel, SymTab, R))
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return EC;
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S->Relocations.push_back(R);
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}
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} else {
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auto Rels = Obj.relas(Shdr);
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if (!Rels)
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return errorToErrorCode(Rels.takeError());
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for (const Elf_Rela &Rel : *Rels) {
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ELFYAML::Relocation R;
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if (std::error_code EC = dumpRelocation(&Rel, SymTab, R))
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return EC;
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R.Addend = Rel.r_addend;
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S->Relocations.push_back(R);
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}
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}
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return S.release();
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}
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template <class ELFT>
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ErrorOr<ELFYAML::RawContentSection *>
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ELFDumper<ELFT>::dumpContentSection(const Elf_Shdr *Shdr) {
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auto S = make_unique<ELFYAML::RawContentSection>();
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if (std::error_code EC = dumpCommonSection(Shdr, *S))
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return EC;
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auto ContentOrErr = Obj.getSectionContents(Shdr);
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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;
|
|
}
|