path: root/tools/llvm-readobj/ELFDumper.cpp

//===-- ELFDumper.cpp - ELF-specific dumper ---------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief This file implements the ELF-specific dumper for llvm-readobj.
///
//===----------------------------------------------------------------------===//

#include "llvm-readobj.h"
#include "Error.h"
#include "ObjDumper.h"
#include "StreamWriter.h"

#include "llvm/ADT/SmallString.h"
#include "llvm/Object/ELF.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"

using namespace llvm;
using namespace llvm::object;
using namespace ELF;


#define LLVM_READOBJ_ENUM_CASE(ns, enum) \
  case ns::enum: return #enum;

namespace {

template<typename ELFT>
class ELFDumper : public ObjDumper {
public:
  ELFDumper(const ELFObjectFile<ELFT> *Obj, StreamWriter& Writer)
    : ObjDumper(Writer)
    , Obj(Obj) { }

  virtual void printFileHeaders() LLVM_OVERRIDE;
  virtual void printSections() LLVM_OVERRIDE;
  virtual void printRelocations() LLVM_OVERRIDE;
  virtual void printSymbols() LLVM_OVERRIDE;
  virtual void printDynamicSymbols() LLVM_OVERRIDE;
  virtual void printUnwindInfo() LLVM_OVERRIDE;

  virtual void printDynamicTable() LLVM_OVERRIDE;
  virtual void printNeededLibraries() LLVM_OVERRIDE;
  virtual void printProgramHeaders() LLVM_OVERRIDE;
  virtual void printARMBuildAttributes() LLVM_OVERRIDE;

private:
  typedef ELFObjectFile<ELFT> ELFO;
  typedef typename ELFO::Elf_Shdr Elf_Shdr;
  typedef typename ELFO::Elf_Sym Elf_Sym;

  void printSymbol(symbol_iterator SymI, bool IsDynamic = false);

  void printRelocation(section_iterator SecI, relocation_iterator RelI);

  const ELFO *Obj;
};

} // namespace


namespace llvm {

error_code createELFDumper(const object::ObjectFile *Obj,
                           StreamWriter& Writer,
                           OwningPtr<ObjDumper> &Result) {
  typedef ELFType<support::little, 4, false> Little32ELF;
  typedef ELFType<support::big,    4, false> Big32ELF;
  typedef ELFType<support::little, 4, true > Little64ELF;
  typedef ELFType<support::big,    8, true > Big64ELF;

  typedef ELFObjectFile<Little32ELF> LittleELF32Obj;
  typedef ELFObjectFile<Big32ELF   > BigELF32Obj;
  typedef ELFObjectFile<Little64ELF> LittleELF64Obj;
  typedef ELFObjectFile<Big64ELF   > BigELF64Obj;

  // Little-endian 32-bit
  if (const LittleELF32Obj *ELFObj = dyn_cast<LittleELF32Obj>(Obj)) {
    Result.reset(new ELFDumper<Little32ELF>(ELFObj, Writer));
    return readobj_error::success;
  }

  // Big-endian 32-bit
  if (const BigELF32Obj *ELFObj = dyn_cast<BigELF32Obj>(Obj)) {
    Result.reset(new ELFDumper<Big32ELF>(ELFObj, Writer));
    return readobj_error::success;
  }

  // Little-endian 64-bit
  if (const LittleELF64Obj *ELFObj = dyn_cast<LittleELF64Obj>(Obj)) {
    Result.reset(new ELFDumper<Little64ELF>(ELFObj, Writer));
    return readobj_error::success;
  }

  // Big-endian 64-bit
  if (const BigELF64Obj *ELFObj = dyn_cast<BigELF64Obj>(Obj)) {
    Result.reset(new ELFDumper<Big64ELF>(ELFObj, Writer));
    return readobj_error::success;
  }

  return readobj_error::unsupported_obj_file_format;
}

} // namespace llvm


static const EnumEntry<unsigned> ElfClass[] = {
  { "None",   ELF::ELFCLASSNONE },
  { "32-bit", ELF::ELFCLASS32   },
  { "64-bit", ELF::ELFCLASS64   },
};

static const EnumEntry<unsigned> ElfDataEncoding[] = {
  { "None",         ELF::ELFDATANONE },
  { "LittleEndian", ELF::ELFDATA2LSB },
  { "BigEndian",    ELF::ELFDATA2MSB },
};

static const EnumEntry<unsigned> ElfObjectFileType[] = {
  { "None",         ELF::ET_NONE },
  { "Relocatable",  ELF::ET_REL  },
  { "Executable",   ELF::ET_EXEC },
  { "SharedObject", ELF::ET_DYN  },
  { "Core",         ELF::ET_CORE },
};

static const EnumEntry<unsigned> ElfOSABI[] = {
  { "SystemV",      ELF::ELFOSABI_NONE         },