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ELFDumper.cpp
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//===- ELFDumper.cpp - ELF-specific dumper --------------------------------===//
//
// 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 "ARMEHABIPrinter.h"
#include "Error.h"
#include "ObjDumper.h"
#include "StackMapPrinter.h"
#include "llvm-readobj.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/Object/ELF.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Object/ELFTypes.h"
#include "llvm/Object/Error.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/StackMapParser.h"
#include "llvm/Support/ARMAttributeParser.h"
#include "llvm/Support/ARMBuildAttributes.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MipsABIFlags.h"
#include "llvm/Support/ScopedPrinter.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cinttypes>
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <iterator>
#include <memory>
#include <string>
#include <system_error>
#include <vector>
using namespace llvm;
using namespace llvm::object;
using namespace ELF;
#define LLVM_READOBJ_ENUM_CASE(ns, enum) \
case ns::enum: return #enum;
#define ENUM_ENT(enum, altName) \
{ #enum, altName, ELF::enum }
#define ENUM_ENT_1(enum) \
{ #enum, #enum, ELF::enum }
#define LLVM_READOBJ_PHDR_ENUM(ns, enum) \
case ns::enum: \
return std::string(#enum).substr(3);
#define TYPEDEF_ELF_TYPES(ELFT) \
using ELFO = ELFFile<ELFT>; \
using Elf_Shdr = typename ELFO::Elf_Shdr; \
using Elf_Sym = typename ELFO::Elf_Sym; \
using Elf_Dyn = typename ELFO::Elf_Dyn; \
using Elf_Dyn_Range = typename ELFO::Elf_Dyn_Range; \
using Elf_Rel = typename ELFO::Elf_Rel; \
using Elf_Rela = typename ELFO::Elf_Rela; \
using Elf_Rel_Range = typename ELFO::Elf_Rel_Range; \
using Elf_Rela_Range = typename ELFO::Elf_Rela_Range; \
using Elf_Phdr = typename ELFO::Elf_Phdr; \
using Elf_Half = typename ELFO::Elf_Half; \
using Elf_Ehdr = typename ELFO::Elf_Ehdr; \
using Elf_Word = typename ELFO::Elf_Word; \
using Elf_Hash = typename ELFO::Elf_Hash; \
using Elf_GnuHash = typename ELFO::Elf_GnuHash; \
using Elf_Sym_Range = typename ELFO::Elf_Sym_Range; \
using Elf_Versym = typename ELFO::Elf_Versym; \
using Elf_Verneed = typename ELFO::Elf_Verneed; \
using Elf_Vernaux = typename ELFO::Elf_Vernaux; \
using Elf_Verdef = typename ELFO::Elf_Verdef; \
using Elf_Verdaux = typename ELFO::Elf_Verdaux; \
using uintX_t = typename ELFO::uintX_t;
namespace {
template <class ELFT> class DumpStyle;
/// Represents a contiguous uniform range in the file. We cannot just create a
/// range directly because when creating one of these from the .dynamic table
/// the size, entity size and virtual address are different entries in arbitrary
/// order (DT_REL, DT_RELSZ, DT_RELENT for example).
struct DynRegionInfo {
DynRegionInfo() = default;
DynRegionInfo(const void *A, uint64_t S, uint64_t ES)
: Addr(A), Size(S), EntSize(ES) {}
/// \brief Address in current address space.
const void *Addr = nullptr;
/// \brief Size in bytes of the region.
uint64_t Size = 0;
/// \brief Size of each entity in the region.
uint64_t EntSize = 0;
template <typename Type> ArrayRef<Type> getAsArrayRef() const {
const Type *Start = reinterpret_cast<const Type *>(Addr);
if (!Start)
return {Start, Start};
if (EntSize != sizeof(Type) || Size % EntSize)
reportError("Invalid entity size");
return {Start, Start + (Size / EntSize)};
}
};
template<typename ELFT>
class ELFDumper : public ObjDumper {
public:
ELFDumper(const ELFFile<ELFT> *Obj, ScopedPrinter &Writer);
void printFileHeaders() override;
void printSections() override;
void printRelocations() override;
void printDynamicRelocations() override;
void printSymbols() override;
void printDynamicSymbols() override;
void printUnwindInfo() override;
void printDynamicTable() override;
void printNeededLibraries() override;
void printProgramHeaders() override;
void printHashTable() override;
void printGnuHashTable() override;
void printLoadName() override;
void printVersionInfo() override;
void printGroupSections() override;
void printAttributes() override;
void printMipsPLTGOT() override;
void printMipsABIFlags() override;
void printMipsReginfo() override;
void printMipsOptions() override;
void printAMDGPUCodeObjectMetadata() override;
void printStackMap() const override;
void printHashHistogram() override;
void printNotes() override;
private:
std::unique_ptr<DumpStyle<ELFT>> ELFDumperStyle;
TYPEDEF_ELF_TYPES(ELFT)
DynRegionInfo checkDRI(DynRegionInfo DRI) {
if (DRI.Addr < Obj->base() ||
(const uint8_t *)DRI.Addr + DRI.Size > Obj->base() + Obj->getBufSize())
error(llvm::object::object_error::parse_failed);
return DRI;
}
DynRegionInfo createDRIFrom(const Elf_Phdr *P, uintX_t EntSize) {
return checkDRI({Obj->base() + P->p_offset, P->p_filesz, EntSize});
}
DynRegionInfo createDRIFrom(const Elf_Shdr *S) {
return checkDRI({Obj->base() + S->sh_offset, S->sh_size, S->sh_entsize});
}
void parseDynamicTable(ArrayRef<const Elf_Phdr *> LoadSegments);
void printValue(uint64_t Type, uint64_t Value);
StringRef getDynamicString(uint64_t Offset) const;
StringRef getSymbolVersion(StringRef StrTab, const Elf_Sym *symb,
bool &IsDefault) const;
void LoadVersionMap() const;
void LoadVersionNeeds(const Elf_Shdr *ec) const;
void LoadVersionDefs(const Elf_Shdr *sec) const;
const ELFO *Obj;
DynRegionInfo DynRelRegion;
DynRegionInfo DynRelaRegion;
DynRegionInfo DynPLTRelRegion;
DynRegionInfo DynSymRegion;
DynRegionInfo DynamicTable;
StringRef DynamicStringTable;
StringRef SOName;
const Elf_Hash *HashTable = nullptr;
const Elf_GnuHash *GnuHashTable = nullptr;
const Elf_Shdr *DotSymtabSec = nullptr;
StringRef DynSymtabName;
ArrayRef<Elf_Word> ShndxTable;
const Elf_Shdr *dot_gnu_version_sec = nullptr; // .gnu.version
const Elf_Shdr *dot_gnu_version_r_sec = nullptr; // .gnu.version_r
const Elf_Shdr *dot_gnu_version_d_sec = nullptr; // .gnu.version_d
// Records for each version index the corresponding Verdef or Vernaux entry.
// This is filled the first time LoadVersionMap() is called.
class VersionMapEntry : public PointerIntPair<const void *, 1> {
public:
// If the integer is 0, this is an Elf_Verdef*.
// If the integer is 1, this is an Elf_Vernaux*.
VersionMapEntry() : PointerIntPair<const void *, 1>(nullptr, 0) {}
VersionMapEntry(const Elf_Verdef *verdef)
: PointerIntPair<const void *, 1>(verdef, 0) {}
VersionMapEntry(const Elf_Vernaux *vernaux)
: PointerIntPair<const void *, 1>(vernaux, 1) {}
bool isNull() const { return getPointer() == nullptr; }
bool isVerdef() const { return !isNull() && getInt() == 0; }
bool isVernaux() const { return !isNull() && getInt() == 1; }
const Elf_Verdef *getVerdef() const {
return isVerdef() ? (const Elf_Verdef *)getPointer() : nullptr;
}
const Elf_Vernaux *getVernaux() const {
return isVernaux() ? (const Elf_Vernaux *)getPointer() : nullptr;
}
};
mutable SmallVector<VersionMapEntry, 16> VersionMap;
public:
Elf_Dyn_Range dynamic_table() const {
return DynamicTable.getAsArrayRef<Elf_Dyn>();
}
Elf_Sym_Range dynamic_symbols() const {
return DynSymRegion.getAsArrayRef<Elf_Sym>();
}
Elf_Rel_Range dyn_rels() const;
Elf_Rela_Range dyn_relas() const;
std::string getFullSymbolName(const Elf_Sym *Symbol, StringRef StrTable,
bool IsDynamic) const;
void printSymbolsHelper(bool IsDynamic) const;
const Elf_Shdr *getDotSymtabSec() const { return DotSymtabSec; }
ArrayRef<Elf_Word> getShndxTable() const { return ShndxTable; }
StringRef getDynamicStringTable() const { return DynamicStringTable; }
const DynRegionInfo &getDynRelRegion() const { return DynRelRegion; }
const DynRegionInfo &getDynRelaRegion() const { return DynRelaRegion; }
const DynRegionInfo &getDynPLTRelRegion() const { return DynPLTRelRegion; }
const Elf_Hash *getHashTable() const { return HashTable; }
const Elf_GnuHash *getGnuHashTable() const { return GnuHashTable; }
};
template <class ELFT>
void ELFDumper<ELFT>::printSymbolsHelper(bool IsDynamic) const {
StringRef StrTable, SymtabName;
size_t Entries = 0;
Elf_Sym_Range Syms(nullptr, nullptr);
if (IsDynamic) {
StrTable = DynamicStringTable;
Syms = dynamic_symbols();
SymtabName = DynSymtabName;
if (DynSymRegion.Addr)
Entries = DynSymRegion.Size / DynSymRegion.EntSize;
} else {
if (!DotSymtabSec)
return;
StrTable = unwrapOrError(Obj->getStringTableForSymtab(*DotSymtabSec));
Syms = unwrapOrError(Obj->symbols(DotSymtabSec));
SymtabName = unwrapOrError(Obj->getSectionName(DotSymtabSec));
Entries = DotSymtabSec->getEntityCount();
}
if (Syms.begin() == Syms.end())
return;
ELFDumperStyle->printSymtabMessage(Obj, SymtabName, Entries);
for (const auto &Sym : Syms)
ELFDumperStyle->printSymbol(Obj, &Sym, Syms.begin(), StrTable, IsDynamic);
}
template <typename ELFT> class DumpStyle {
public:
using Elf_Shdr = typename ELFFile<ELFT>::Elf_Shdr;
using Elf_Sym = typename ELFFile<ELFT>::Elf_Sym;
DumpStyle(ELFDumper<ELFT> *Dumper) : Dumper(Dumper) {}
virtual ~DumpStyle() = default;
virtual void printFileHeaders(const ELFFile<ELFT> *Obj) = 0;
virtual void printGroupSections(const ELFFile<ELFT> *Obj) = 0;
virtual void printRelocations(const ELFFile<ELFT> *Obj) = 0;
virtual void printSections(const ELFFile<ELFT> *Obj) = 0;
virtual void printSymbols(const ELFFile<ELFT> *Obj) = 0;
virtual void printDynamicSymbols(const ELFFile<ELFT> *Obj) = 0;
virtual void printDynamicRelocations(const ELFFile<ELFT> *Obj) = 0;
virtual void printSymtabMessage(const ELFFile<ELFT> *obj, StringRef Name,
size_t Offset) {}
virtual void printSymbol(const ELFFile<ELFT> *Obj, const Elf_Sym *Symbol,
const Elf_Sym *FirstSym, StringRef StrTable,
bool IsDynamic) = 0;
virtual void printProgramHeaders(const ELFFile<ELFT> *Obj) = 0;
virtual void printHashHistogram(const ELFFile<ELFT> *Obj) = 0;
virtual void printNotes(const ELFFile<ELFT> *Obj) = 0;
const ELFDumper<ELFT> *dumper() const { return Dumper; }
private:
const ELFDumper<ELFT> *Dumper;
};
template <typename ELFT> class GNUStyle : public DumpStyle<ELFT> {
formatted_raw_ostream OS;
public:
TYPEDEF_ELF_TYPES(ELFT)
GNUStyle(ScopedPrinter &W, ELFDumper<ELFT> *Dumper)
: DumpStyle<ELFT>(Dumper), OS(W.getOStream()) {}
void printFileHeaders(const ELFO *Obj) override;
void printGroupSections(const ELFFile<ELFT> *Obj) override;
void printRelocations(const ELFO *Obj) override;
void printSections(const ELFO *Obj) override;
void printSymbols(const ELFO *Obj) override;
void printDynamicSymbols(const ELFO *Obj) override;
void printDynamicRelocations(const ELFO *Obj) override;
void printSymtabMessage(const ELFO *Obj, StringRef Name,
size_t Offset) override;
void printProgramHeaders(const ELFO *Obj) override;
void printHashHistogram(const ELFFile<ELFT> *Obj) override;
void printNotes(const ELFFile<ELFT> *Obj) override;
private:
struct Field {
StringRef Str;
unsigned Column;
Field(StringRef S, unsigned Col) : Str(S), Column(Col) {}
Field(unsigned Col) : Str(""), Column(Col) {}
};
template <typename T, typename TEnum>
std::string printEnum(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues) {
for (const auto &EnumItem : EnumValues)
if (EnumItem.Value == Value)
return EnumItem.AltName;
return to_hexString(Value, false);
}
formatted_raw_ostream &printField(struct Field F) {
if (F.Column != 0)
OS.PadToColumn(F.Column);
OS << F.Str;
OS.flush();
return OS;
}
void printHashedSymbol(const ELFO *Obj, const Elf_Sym *FirstSym, uint32_t Sym,
StringRef StrTable, uint32_t Bucket);
void printRelocation(const ELFO *Obj, const Elf_Shdr *SymTab,
const Elf_Rela &R, bool IsRela);
void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First,
StringRef StrTable, bool IsDynamic) override;
std::string getSymbolSectionNdx(const ELFO *Obj, const Elf_Sym *Symbol,
const Elf_Sym *FirstSym);
void printDynamicRelocation(const ELFO *Obj, Elf_Rela R, bool IsRela);
bool checkTLSSections(const Elf_Phdr &Phdr, const Elf_Shdr &Sec);
bool checkoffsets(const Elf_Phdr &Phdr, const Elf_Shdr &Sec);
bool checkVMA(const Elf_Phdr &Phdr, const Elf_Shdr &Sec);
bool checkPTDynamic(const Elf_Phdr &Phdr, const Elf_Shdr &Sec);
};
template <typename ELFT> class LLVMStyle : public DumpStyle<ELFT> {
public:
TYPEDEF_ELF_TYPES(ELFT)
LLVMStyle(ScopedPrinter &W, ELFDumper<ELFT> *Dumper)
: DumpStyle<ELFT>(Dumper), W(W) {}
void printFileHeaders(const ELFO *Obj) override;
void printGroupSections(const ELFFile<ELFT> *Obj) override;
void printRelocations(const ELFO *Obj) override;
void printRelocations(const Elf_Shdr *Sec, const ELFO *Obj);
void printSections(const ELFO *Obj) override;
void printSymbols(const ELFO *Obj) override;
void printDynamicSymbols(const ELFO *Obj) override;
void printDynamicRelocations(const ELFO *Obj) override;
void printProgramHeaders(const ELFO *Obj) override;
void printHashHistogram(const ELFFile<ELFT> *Obj) override;
void printNotes(const ELFFile<ELFT> *Obj) override;
private:
void printRelocation(const ELFO *Obj, Elf_Rela Rel, const Elf_Shdr *SymTab);
void printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel);
void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First,
StringRef StrTable, bool IsDynamic) override;
ScopedPrinter &W;
};
} // end anonymous namespace
namespace llvm {
template <class ELFT>
static std::error_code createELFDumper(const ELFFile<ELFT> *Obj,
ScopedPrinter &Writer,
std::unique_ptr<ObjDumper> &Result) {
Result.reset(new ELFDumper<ELFT>(Obj, Writer));
return readobj_error::success;
}
std::error_code createELFDumper(const object::ObjectFile *Obj,
ScopedPrinter &Writer,
std::unique_ptr<ObjDumper> &Result) {
// Little-endian 32-bit
if (const ELF32LEObjectFile *ELFObj = dyn_cast<ELF32LEObjectFile>(Obj))
return createELFDumper(ELFObj->getELFFile(), Writer, Result);
// Big-endian 32-bit
if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
return createELFDumper(ELFObj->getELFFile(), Writer, Result);
// Little-endian 64-bit
if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
return createELFDumper(ELFObj->getELFFile(), Writer, Result);
// Big-endian 64-bit
if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
return createELFDumper(ELFObj->getELFFile(), Writer, Result);
return readobj_error::unsupported_obj_file_format;
}
} // end namespace llvm
// Iterate through the versions needed section, and place each Elf_Vernaux
// in the VersionMap according to its index.
template <class ELFT>
void ELFDumper<ELFT>::LoadVersionNeeds(const Elf_Shdr *sec) const {
unsigned vn_size = sec->sh_size; // Size of section in bytes
unsigned vn_count = sec->sh_info; // Number of Verneed entries
const char *sec_start = (const char *)Obj->base() + sec->sh_offset;
const char *sec_end = sec_start + vn_size;
// The first Verneed entry is at the start of the section.
const char *p = sec_start;
for (unsigned i = 0; i < vn_count; i++) {
if (p + sizeof(Elf_Verneed) > sec_end)
report_fatal_error("Section ended unexpectedly while scanning "
"version needed records.");
const Elf_Verneed *vn = reinterpret_cast<const Elf_Verneed *>(p);
if (vn->vn_version != ELF::VER_NEED_CURRENT)
report_fatal_error("Unexpected verneed version");
// Iterate through the Vernaux entries
const char *paux = p + vn->vn_aux;
for (unsigned j = 0; j < vn->vn_cnt; j++) {
if (paux + sizeof(Elf_Vernaux) > sec_end)
report_fatal_error("Section ended unexpected while scanning auxiliary "
"version needed records.");
const Elf_Vernaux *vna = reinterpret_cast<const Elf_Vernaux *>(paux);
size_t index = vna->vna_other & ELF::VERSYM_VERSION;
if (index >= VersionMap.size())
VersionMap.resize(index + 1);
VersionMap[index] = VersionMapEntry(vna);
paux += vna->vna_next;
}
p += vn->vn_next;
}
}
// Iterate through the version definitions, and place each Elf_Verdef
// in the VersionMap according to its index.
template <class ELFT>
void ELFDumper<ELFT>::LoadVersionDefs(const Elf_Shdr *sec) const {
unsigned vd_size = sec->sh_size; // Size of section in bytes
unsigned vd_count = sec->sh_info; // Number of Verdef entries
const char *sec_start = (const char *)Obj->base() + sec->sh_offset;
const char *sec_end = sec_start + vd_size;
// The first Verdef entry is at the start of the section.
const char *p = sec_start;
for (unsigned i = 0; i < vd_count; i++) {
if (p + sizeof(Elf_Verdef) > sec_end)
report_fatal_error("Section ended unexpectedly while scanning "
"version definitions.");
const Elf_Verdef *vd = reinterpret_cast<const Elf_Verdef *>(p);
if (vd->vd_version != ELF::VER_DEF_CURRENT)
report_fatal_error("Unexpected verdef version");
size_t index = vd->vd_ndx & ELF::VERSYM_VERSION;
if (index >= VersionMap.size())
VersionMap.resize(index + 1);
VersionMap[index] = VersionMapEntry(vd);
p += vd->vd_next;
}
}
template <class ELFT> void ELFDumper<ELFT>::LoadVersionMap() const {
// If there is no dynamic symtab or version table, there is nothing to do.
if (!DynSymRegion.Addr || !dot_gnu_version_sec)
return;
// Has the VersionMap already been loaded?
if (VersionMap.size() > 0)
return;
// The first two version indexes are reserved.
// Index 0 is LOCAL, index 1 is GLOBAL.
VersionMap.push_back(VersionMapEntry());
VersionMap.push_back(VersionMapEntry());
if (dot_gnu_version_d_sec)
LoadVersionDefs(dot_gnu_version_d_sec);
if (dot_gnu_version_r_sec)
LoadVersionNeeds(dot_gnu_version_r_sec);
}
template <typename ELFO, class ELFT>
static void printVersionSymbolSection(ELFDumper<ELFT> *Dumper, const ELFO *Obj,
const typename ELFO::Elf_Shdr *Sec,
ScopedPrinter &W) {
DictScope SS(W, "Version symbols");
if (!Sec)
return;
StringRef Name = unwrapOrError(Obj->getSectionName(Sec));
W.printNumber("Section Name", Name, Sec->sh_name);
W.printHex("Address", Sec->sh_addr);
W.printHex("Offset", Sec->sh_offset);
W.printNumber("Link", Sec->sh_link);
const uint8_t *P = (const uint8_t *)Obj->base() + Sec->sh_offset;
StringRef StrTable = Dumper->getDynamicStringTable();
// Same number of entries in the dynamic symbol table (DT_SYMTAB).
ListScope Syms(W, "Symbols");
for (const typename ELFO::Elf_Sym &Sym : Dumper->dynamic_symbols()) {
DictScope S(W, "Symbol");
std::string FullSymbolName =
Dumper->getFullSymbolName(&Sym, StrTable, true /* IsDynamic */);
W.printNumber("Version", *P);
W.printString("Name", FullSymbolName);
P += sizeof(typename ELFO::Elf_Half);
}
}
static const EnumEntry<unsigned> SymVersionFlags[] = {
{"Base", "BASE", VER_FLG_BASE},
{"Weak", "WEAK", VER_FLG_WEAK},
{"Info", "INFO", VER_FLG_INFO}};
template <typename ELFO, class ELFT>
static void printVersionDefinitionSection(ELFDumper<ELFT> *Dumper,
const ELFO *Obj,
const typename ELFO::Elf_Shdr *Sec,
ScopedPrinter &W) {
using VerDef = typename ELFO::Elf_Verdef;
using VerdAux = typename ELFO::Elf_Verdaux;
DictScope SD(W, "SHT_GNU_verdef");
if (!Sec)
return;
// The number of entries in the section SHT_GNU_verdef
// is determined by DT_VERDEFNUM tag.
unsigned VerDefsNum = 0;
for (const typename ELFO::Elf_Dyn &Dyn : Dumper->dynamic_table()) {
if (Dyn.d_tag == DT_VERDEFNUM)
VerDefsNum = Dyn.d_un.d_val;
}
const uint8_t *SecStartAddress =
(const uint8_t *)Obj->base() + Sec->sh_offset;
const uint8_t *SecEndAddress = SecStartAddress + Sec->sh_size;
const uint8_t *P = SecStartAddress;
const typename ELFO::Elf_Shdr *StrTab =
unwrapOrError(Obj->getSection(Sec->sh_link));
while (VerDefsNum--) {
if (P + sizeof(VerDef) > SecEndAddress)
report_fatal_error("invalid offset in the section");
auto *VD = reinterpret_cast<const VerDef *>(P);
DictScope Def(W, "Definition");
W.printNumber("Version", VD->vd_version);
W.printEnum("Flags", VD->vd_flags, makeArrayRef(SymVersionFlags));
W.printNumber("Index", VD->vd_ndx);
W.printNumber("Hash", VD->vd_hash);
W.printString("Name",
StringRef((const char *)(Obj->base() + StrTab->sh_offset +
VD->getAux()->vda_name)));
if (!VD->vd_cnt)
report_fatal_error("at least one definition string must exist");
if (VD->vd_cnt > 2)
report_fatal_error("more than one predecessor is not expected");
if (VD->vd_cnt == 2) {
const uint8_t *PAux = P + VD->vd_aux + VD->getAux()->vda_next;
const VerdAux *Aux = reinterpret_cast<const VerdAux *>(PAux);
W.printString("Predecessor",
StringRef((const char *)(Obj->base() + StrTab->sh_offset +
Aux->vda_name)));
}
P += VD->vd_next;
}
}
template <typename ELFO, class ELFT>
static void printVersionDependencySection(ELFDumper<ELFT> *Dumper,
const ELFO *Obj,
const typename ELFO::Elf_Shdr *Sec,
ScopedPrinter &W) {
using VerNeed = typename ELFO::Elf_Verneed;
using VernAux = typename ELFO::Elf_Vernaux;
DictScope SD(W, "SHT_GNU_verneed");
if (!Sec)
return;
unsigned VerNeedNum = 0;
for (const typename ELFO::Elf_Dyn &Dyn : Dumper->dynamic_table())
if (Dyn.d_tag == DT_VERNEEDNUM)
VerNeedNum = Dyn.d_un.d_val;
const uint8_t *SecData = (const uint8_t *)Obj->base() + Sec->sh_offset;
const typename ELFO::Elf_Shdr *StrTab =
unwrapOrError(Obj->getSection(Sec->sh_link));
const uint8_t *P = SecData;
for (unsigned I = 0; I < VerNeedNum; ++I) {
const VerNeed *Need = reinterpret_cast<const VerNeed *>(P);
DictScope Entry(W, "Dependency");
W.printNumber("Version", Need->vn_version);
W.printNumber("Count", Need->vn_cnt);
W.printString("FileName",
StringRef((const char *)(Obj->base() + StrTab->sh_offset +
Need->vn_file)));
const uint8_t *PAux = P + Need->vn_aux;
for (unsigned J = 0; J < Need->vn_cnt; ++J) {
const VernAux *Aux = reinterpret_cast<const VernAux *>(PAux);
DictScope Entry(W, "Entry");
W.printNumber("Hash", Aux->vna_hash);
W.printEnum("Flags", Aux->vna_flags, makeArrayRef(SymVersionFlags));
W.printNumber("Index", Aux->vna_other);
W.printString("Name",
StringRef((const char *)(Obj->base() + StrTab->sh_offset +
Aux->vna_name)));
PAux += Aux->vna_next;
}
P += Need->vn_next;
}
}
template <typename ELFT> void ELFDumper<ELFT>::printVersionInfo() {
// Dump version symbol section.
printVersionSymbolSection(this, Obj, dot_gnu_version_sec, W);
// Dump version definition section.
printVersionDefinitionSection(this, Obj, dot_gnu_version_d_sec, W);
// Dump version dependency section.
printVersionDependencySection(this, Obj, dot_gnu_version_r_sec, W);
}
template <typename ELFT>
StringRef ELFDumper<ELFT>::getSymbolVersion(StringRef StrTab,
const Elf_Sym *symb,
bool &IsDefault) const {
// This is a dynamic symbol. Look in the GNU symbol version table.
if (!dot_gnu_version_sec) {
// No version table.
IsDefault = false;
return StringRef("");
}
// Determine the position in the symbol table of this entry.
size_t entry_index = (reinterpret_cast<uintptr_t>(symb) -
reinterpret_cast<uintptr_t>(DynSymRegion.Addr)) /
sizeof(Elf_Sym);
// Get the corresponding version index entry
const Elf_Versym *vs = unwrapOrError(
Obj->template getEntry<Elf_Versym>(dot_gnu_version_sec, entry_index));
size_t version_index = vs->vs_index & ELF::VERSYM_VERSION;
// Special markers for unversioned symbols.
if (version_index == ELF::VER_NDX_LOCAL ||
version_index == ELF::VER_NDX_GLOBAL) {
IsDefault = false;
return StringRef("");
}
// Lookup this symbol in the version table
LoadVersionMap();
if (version_index >= VersionMap.size() || VersionMap[version_index].isNull())
reportError("Invalid version entry");
const VersionMapEntry &entry = VersionMap[version_index];
// Get the version name string
size_t name_offset;
if (entry.isVerdef()) {
// The first Verdaux entry holds the name.
name_offset = entry.getVerdef()->getAux()->vda_name;
IsDefault = !(vs->vs_index & ELF::VERSYM_HIDDEN);
} else {
name_offset = entry.getVernaux()->vna_name;
IsDefault = false;
}
if (name_offset >= StrTab.size())
reportError("Invalid string offset");
return StringRef(StrTab.data() + name_offset);
}
template <typename ELFT>
std::string ELFDumper<ELFT>::getFullSymbolName(const Elf_Sym *Symbol,
StringRef StrTable,
bool IsDynamic) const {
StringRef SymbolName = unwrapOrError(Symbol->getName(StrTable));
if (!IsDynamic)
return SymbolName;
std::string FullSymbolName(SymbolName);
bool IsDefault;
StringRef Version = getSymbolVersion(StrTable, &*Symbol, IsDefault);
FullSymbolName += (IsDefault ? "@@" : "@");
FullSymbolName += Version;
return FullSymbolName;
}
template <typename ELFT>
static void
getSectionNameIndex(const ELFFile<ELFT> &Obj, const typename ELFT::Sym *Symbol,
const typename ELFT::Sym *FirstSym,
ArrayRef<typename ELFT::Word> ShndxTable,
StringRef &SectionName, unsigned &SectionIndex) {
SectionIndex = Symbol->st_shndx;
if (Symbol->isUndefined())
SectionName = "Undefined";
else if (Symbol->isProcessorSpecific())
SectionName = "Processor Specific";
else if (Symbol->isOSSpecific())
SectionName = "Operating System Specific";
else if (Symbol->isAbsolute())
SectionName = "Absolute";
else if (Symbol->isCommon())
SectionName = "Common";
else if (Symbol->isReserved() && SectionIndex != SHN_XINDEX)
SectionName = "Reserved";
else {
if (SectionIndex == SHN_XINDEX)
SectionIndex = unwrapOrError(object::getExtendedSymbolTableIndex<ELFT>(
Symbol, FirstSym, ShndxTable));
const typename ELFT::Shdr *Sec =
unwrapOrError(Obj.getSection(SectionIndex));
SectionName = unwrapOrError(Obj.getSectionName(Sec));
}
}
template <class ELFO>
static const typename ELFO::Elf_Shdr *
findNotEmptySectionByAddress(const ELFO *Obj, uint64_t Addr) {
for (const auto &Shdr : unwrapOrError(Obj->sections()))
if (Shdr.sh_addr == Addr && Shdr.sh_size > 0)
return &Shdr;
return nullptr;
}
template <class ELFO>
static const typename ELFO::Elf_Shdr *findSectionByName(const ELFO &Obj,
StringRef Name) {
for (const auto &Shdr : unwrapOrError(Obj.sections())) {
if (Name == unwrapOrError(Obj.getSectionName(&Shdr)))
return &Shdr;
}
return nullptr;
}
static const EnumEntry<unsigned> ElfClass[] = {
{"None", "none", ELF::ELFCLASSNONE},
{"32-bit", "ELF32", ELF::ELFCLASS32},
{"64-bit", "ELF64", ELF::ELFCLASS64},
};
static const EnumEntry<unsigned> ElfDataEncoding[] = {
{"None", "none", ELF::ELFDATANONE},
{"LittleEndian", "2's complement, little endian", ELF::ELFDATA2LSB},
{"BigEndian", "2's complement, big endian", ELF::ELFDATA2MSB},
};
static const EnumEntry<unsigned> ElfObjectFileType[] = {
{"None", "NONE (none)", ELF::ET_NONE},
{"Relocatable", "REL (Relocatable file)", ELF::ET_REL},
{"Executable", "EXEC (Executable file)", ELF::ET_EXEC},
{"SharedObject", "DYN (Shared object file)", ELF::ET_DYN},
{"Core", "CORE (Core file)", ELF::ET_CORE},
};
static const EnumEntry<unsigned> ElfOSABI[] = {
{"SystemV", "UNIX - System V", ELF::ELFOSABI_NONE},
{"HPUX", "UNIX - HP-UX", ELF::ELFOSABI_HPUX},
{"NetBSD", "UNIX - NetBSD", ELF::ELFOSABI_NETBSD},
{"GNU/Linux", "UNIX - GNU", ELF::ELFOSABI_LINUX},
{"GNU/Hurd", "GNU/Hurd", ELF::ELFOSABI_HURD},
{"Solaris", "UNIX - Solaris", ELF::ELFOSABI_SOLARIS},
{"AIX", "UNIX - AIX", ELF::ELFOSABI_AIX},
{"IRIX", "UNIX - IRIX", ELF::ELFOSABI_IRIX},
{"FreeBSD", "UNIX - FreeBSD", ELF::ELFOSABI_FREEBSD},
{"TRU64", "UNIX - TRU64", ELF::ELFOSABI_TRU64},
{"Modesto", "Novell - Modesto", ELF::ELFOSABI_MODESTO},
{"OpenBSD", "UNIX - OpenBSD", ELF::ELFOSABI_OPENBSD},
{"OpenVMS", "VMS - OpenVMS", ELF::ELFOSABI_OPENVMS},
{"NSK", "HP - Non-Stop Kernel", ELF::ELFOSABI_NSK},
{"AROS", "AROS", ELF::ELFOSABI_AROS},
{"FenixOS", "FenixOS", ELF::ELFOSABI_FENIXOS},
{"CloudABI", "CloudABI", ELF::ELFOSABI_CLOUDABI},
{"C6000_ELFABI", "Bare-metal C6000", ELF::ELFOSABI_C6000_ELFABI},
{"C6000_LINUX", "Linux C6000", ELF::ELFOSABI_C6000_LINUX},
{"ARM", "ARM", ELF::ELFOSABI_ARM},
{"Standalone", "Standalone App", ELF::ELFOSABI_STANDALONE}
};
static const EnumEntry<unsigned> ElfMachineType[] = {
ENUM_ENT(EM_NONE, "None"),
ENUM_ENT(EM_M32, "WE32100"),
ENUM_ENT(EM_SPARC, "Sparc"),
ENUM_ENT(EM_386, "Intel 80386"),
ENUM_ENT(EM_68K, "MC68000"),
ENUM_ENT(EM_88K, "MC88000"),
ENUM_ENT(EM_IAMCU, "EM_IAMCU"),
ENUM_ENT(EM_860, "Intel 80860"),
ENUM_ENT(EM_MIPS, "MIPS R3000"),
ENUM_ENT(EM_S370, "IBM System/370"),
ENUM_ENT(EM_MIPS_RS3_LE, "MIPS R3000 little-endian"),
ENUM_ENT(EM_PARISC, "HPPA"),
ENUM_ENT(EM_VPP500, "Fujitsu VPP500"),
ENUM_ENT(EM_SPARC32PLUS, "Sparc v8+"),
ENUM_ENT(EM_960, "Intel 80960"),
ENUM_ENT(EM_PPC, "PowerPC"),
ENUM_ENT(EM_PPC64, "PowerPC64"),
ENUM_ENT(EM_S390, "IBM S/390"),
ENUM_ENT(EM_SPU, "SPU"),
ENUM_ENT(EM_V800, "NEC V800 series"),
ENUM_ENT(EM_FR20, "Fujistsu FR20"),
ENUM_ENT(EM_RH32, "TRW RH-32"),
ENUM_ENT(EM_RCE, "Motorola RCE"),
ENUM_ENT(EM_ARM, "ARM"),
ENUM_ENT(EM_ALPHA, "EM_ALPHA"),
ENUM_ENT(EM_SH, "Hitachi SH"),
ENUM_ENT(EM_SPARCV9, "Sparc v9"),
ENUM_ENT(EM_TRICORE, "Siemens Tricore"),
ENUM_ENT(EM_ARC, "ARC"),
ENUM_ENT(EM_H8_300, "Hitachi H8/300"),
ENUM_ENT(EM_H8_300H, "Hitachi H8/300H"),
ENUM_ENT(EM_H8S, "Hitachi H8S"),
ENUM_ENT(EM_H8_500, "Hitachi H8/500"),
ENUM_ENT(EM_IA_64, "Intel IA-64"),
ENUM_ENT(EM_MIPS_X, "Stanford MIPS-X"),
ENUM_ENT(EM_COLDFIRE, "Motorola Coldfire"),
ENUM_ENT(EM_68HC12, "Motorola MC68HC12 Microcontroller"),
ENUM_ENT(EM_MMA, "Fujitsu Multimedia Accelerator"),
ENUM_ENT(EM_PCP, "Siemens PCP"),
ENUM_ENT(EM_NCPU, "Sony nCPU embedded RISC processor"),
ENUM_ENT(EM_NDR1, "Denso NDR1 microprocesspr"),
ENUM_ENT(EM_STARCORE, "Motorola Star*Core processor"),
ENUM_ENT(EM_ME16, "Toyota ME16 processor"),
ENUM_ENT(EM_ST100, "STMicroelectronics ST100 processor"),
ENUM_ENT(EM_TINYJ, "Advanced Logic Corp. TinyJ embedded processor"),
ENUM_ENT(EM_X86_64, "Advanced Micro Devices X86-64"),
ENUM_ENT(EM_PDSP, "Sony DSP processor"),
ENUM_ENT(EM_PDP10, "Digital Equipment Corp. PDP-10"),
ENUM_ENT(EM_PDP11, "Digital Equipment Corp. PDP-11"),
ENUM_ENT(EM_FX66, "Siemens FX66 microcontroller"),
ENUM_ENT(EM_ST9PLUS, "STMicroelectronics ST9+ 8/16 bit microcontroller"),
ENUM_ENT(EM_ST7, "STMicroelectronics ST7 8-bit microcontroller"),
ENUM_ENT(EM_68HC16, "Motorola MC68HC16 Microcontroller"),
ENUM_ENT(EM_68HC11, "Motorola MC68HC11 Microcontroller"),
ENUM_ENT(EM_68HC08, "Motorola MC68HC08 Microcontroller"),
ENUM_ENT(EM_68HC05, "Motorola MC68HC05 Microcontroller"),
ENUM_ENT(EM_SVX, "Silicon Graphics SVx"),
ENUM_ENT(EM_ST19, "STMicroelectronics ST19 8-bit microcontroller"),
ENUM_ENT(EM_VAX, "Digital VAX"),
ENUM_ENT(EM_CRIS, "Axis Communications 32-bit embedded processor"),
ENUM_ENT(EM_JAVELIN, "Infineon Technologies 32-bit embedded cpu"),
ENUM_ENT(EM_FIREPATH, "Element 14 64-bit DSP processor"),
ENUM_ENT(EM_ZSP, "LSI Logic's 16-bit DSP processor"),
ENUM_ENT(EM_MMIX, "Donald Knuth's educational 64-bit processor"),
ENUM_ENT(EM_HUANY, "Harvard Universitys's machine-independent object format"),
ENUM_ENT(EM_PRISM, "Vitesse Prism"),
ENUM_ENT(EM_AVR, "Atmel AVR 8-bit microcontroller"),
ENUM_ENT(EM_FR30, "Fujitsu FR30"),
ENUM_ENT(EM_D10V, "Mitsubishi D10V"),
ENUM_ENT(EM_D30V, "Mitsubishi D30V"),
ENUM_ENT(EM_V850, "NEC v850"),
ENUM_ENT(EM_M32R, "Renesas M32R (formerly Mitsubishi M32r)"),
ENUM_ENT(EM_MN10300, "Matsushita MN10300"),
ENUM_ENT(EM_MN10200, "Matsushita MN10200"),
ENUM_ENT(EM_PJ, "picoJava"),
ENUM_ENT(EM_OPENRISC, "OpenRISC 32-bit embedded processor"),
ENUM_ENT(EM_ARC_COMPACT, "EM_ARC_COMPACT"),
ENUM_ENT(EM_XTENSA, "Tensilica Xtensa Processor"),
ENUM_ENT(EM_VIDEOCORE, "Alphamosaic VideoCore processor"),
ENUM_ENT(EM_TMM_GPP, "Thompson Multimedia General Purpose Processor"),
ENUM_ENT(EM_NS32K, "National Semiconductor 32000 series"),
ENUM_ENT(EM_TPC, "Tenor Network TPC processor"),
ENUM_ENT(EM_SNP1K, "EM_SNP1K"),
ENUM_ENT(EM_ST200, "STMicroelectronics ST200 microcontroller"),
ENUM_ENT(EM_IP2K, "Ubicom IP2xxx 8-bit microcontrollers"),
ENUM_ENT(EM_MAX, "MAX Processor"),
ENUM_ENT(EM_CR, "National Semiconductor CompactRISC"),
ENUM_ENT(EM_F2MC16, "Fujitsu F2MC16"),
ENUM_ENT(EM_MSP430, "Texas Instruments msp430 microcontroller"),
ENUM_ENT(EM_BLACKFIN, "Analog Devices Blackfin"),
ENUM_ENT(EM_SE_C33, "S1C33 Family of Seiko Epson processors"),
ENUM_ENT(EM_SEP, "Sharp embedded microprocessor"),
ENUM_ENT(EM_ARCA, "Arca RISC microprocessor"),
ENUM_ENT(EM_UNICORE, "Unicore"),
ENUM_ENT(EM_EXCESS, "eXcess 16/32/64-bit configurable embedded CPU"),
ENUM_ENT(EM_DXP, "Icera Semiconductor Inc. Deep Execution Processor"),
ENUM_ENT(EM_ALTERA_NIOS2, "Altera Nios"),
ENUM_ENT(EM_CRX, "National Semiconductor CRX microprocessor"),
ENUM_ENT(EM_XGATE, "Motorola XGATE embedded processor"),
ENUM_ENT(EM_C166, "Infineon Technologies xc16x"),
ENUM_ENT(EM_M16C, "Renesas M16C"),
ENUM_ENT(EM_DSPIC30F, "Microchip Technology dsPIC30F Digital Signal Controller"),
ENUM_ENT(EM_CE, "Freescale Communication Engine RISC core"),
ENUM_ENT(EM_M32C, "Renesas M32C"),
ENUM_ENT(EM_TSK3000, "Altium TSK3000 core"),
ENUM_ENT(EM_RS08, "Freescale RS08 embedded processor"),
ENUM_ENT(EM_SHARC, "EM_SHARC"),
ENUM_ENT(EM_ECOG2, "Cyan Technology eCOG2 microprocessor"),
ENUM_ENT(EM_SCORE7, "SUNPLUS S+Core"),
ENUM_ENT(EM_DSP24, "New Japan Radio (NJR) 24-bit DSP Processor"),
ENUM_ENT(EM_VIDEOCORE3, "Broadcom VideoCore III processor"),
ENUM_ENT(EM_LATTICEMICO32, "Lattice Mico32"),
ENUM_ENT(EM_SE_C17, "Seiko Epson C17 family"),
ENUM_ENT(EM_TI_C6000, "Texas Instruments TMS320C6000 DSP family"),
ENUM_ENT(EM_TI_C2000, "Texas Instruments TMS320C2000 DSP family"),
ENUM_ENT(EM_TI_C5500, "Texas Instruments TMS320C55x DSP family"),
ENUM_ENT(EM_MMDSP_PLUS, "STMicroelectronics 64bit VLIW Data Signal Processor"),
ENUM_ENT(EM_CYPRESS_M8C, "Cypress M8C microprocessor"),
ENUM_ENT(EM_R32C, "Renesas R32C series microprocessors"),
ENUM_ENT(EM_TRIMEDIA, "NXP Semiconductors TriMedia architecture family"),
ENUM_ENT(EM_HEXAGON, "Qualcomm Hexagon"),
ENUM_ENT(EM_8051, "Intel 8051 and variants"),
ENUM_ENT(EM_STXP7X, "STMicroelectronics STxP7x family"),
ENUM_ENT(EM_NDS32, "Andes Technology compact code size embedded RISC processor family"),
ENUM_ENT(EM_ECOG1, "Cyan Technology eCOG1 microprocessor"),
ENUM_ENT(EM_ECOG1X, "Cyan Technology eCOG1X family"),
ENUM_ENT(EM_MAXQ30, "Dallas Semiconductor MAXQ30 Core microcontrollers"),
ENUM_ENT(EM_XIMO16, "New Japan Radio (NJR) 16-bit DSP Processor"),
ENUM_ENT(EM_MANIK, "M2000 Reconfigurable RISC Microprocessor"),
ENUM_ENT(EM_CRAYNV2, "Cray Inc. NV2 vector architecture"),
ENUM_ENT(EM_RX, "Renesas RX"),
ENUM_ENT(EM_METAG, "Imagination Technologies Meta processor architecture"),
ENUM_ENT(EM_MCST_ELBRUS, "MCST Elbrus general purpose hardware architecture"),
ENUM_ENT(EM_ECOG16, "Cyan Technology eCOG16 family"),
ENUM_ENT(EM_CR16, "Xilinx MicroBlaze"),
ENUM_ENT(EM_ETPU, "Freescale Extended Time Processing Unit"),
ENUM_ENT(EM_SLE9X, "Infineon Technologies SLE9X core"),
ENUM_ENT(EM_L10M, "EM_L10M"),
ENUM_ENT(EM_K10M, "EM_K10M"),
ENUM_ENT(EM_AARCH64, "AArch64"),
ENUM_ENT(EM_AVR32, "Atmel AVR 8-bit microcontroller"),
ENUM_ENT(EM_STM8, "STMicroeletronics STM8 8-bit microcontroller"),
ENUM_ENT(EM_TILE64, "Tilera TILE64 multicore architecture family"),
ENUM_ENT(EM_TILEPRO, "Tilera TILEPro multicore architecture family"),
ENUM_ENT(EM_CUDA, "NVIDIA CUDA architecture"),
ENUM_ENT(EM_TILEGX, "Tilera TILE-Gx multicore architecture family"),
ENUM_ENT(EM_CLOUDSHIELD, "EM_CLOUDSHIELD"),
ENUM_ENT(EM_COREA_1ST, "EM_COREA_1ST"),
ENUM_ENT(EM_COREA_2ND, "EM_COREA_2ND"),
ENUM_ENT(EM_ARC_COMPACT2, "EM_ARC_COMPACT2"),
ENUM_ENT(EM_OPEN8, "EM_OPEN8"),
ENUM_ENT(EM_RL78, "Renesas RL78"),
ENUM_ENT(EM_VIDEOCORE5, "Broadcom VideoCore V processor"),
ENUM_ENT(EM_78KOR, "EM_78KOR"),
ENUM_ENT(EM_56800EX, "EM_56800EX"),
ENUM_ENT(EM_AMDGPU, "EM_AMDGPU"),
ENUM_ENT(EM_RISCV, "RISC-V"),
ENUM_ENT(EM_WEBASSEMBLY, "EM_WEBASSEMBLY"),
ENUM_ENT(EM_LANAI, "EM_LANAI"),
ENUM_ENT(EM_BPF, "EM_BPF"),
};
static const EnumEntry<unsigned> ElfSymbolBindings[] = {
{"Local", "LOCAL", ELF::STB_LOCAL},
{"Global", "GLOBAL", ELF::STB_GLOBAL},
{"Weak", "WEAK", ELF::STB_WEAK},
{"Unique", "UNIQUE", ELF::STB_GNU_UNIQUE}};
static const EnumEntry<unsigned> ElfSymbolVisibilities[] = {
{"DEFAULT", "DEFAULT", ELF::STV_DEFAULT},
{"INTERNAL", "INTERNAL", ELF::STV_INTERNAL},