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cdad2ab091
llvm-mirror/tools/llvm-readobj/ELFDumper.cpp
Georgii Rymar cdad2ab091 [llvm-readobj] - Do not crash when GnuHashTable->symndx is greater than the dynamic symbols count. 
`Elf_GnuHash_Impl` has the following method:

```
ArrayRef<Elf_Word> values(unsigned DynamicSymCount) const {
  return ArrayRef<Elf_Word>(buckets().end(), DynamicSymCount - symndx);
}
```

When DynamicSymCount is less than symndx we return an array with the huge broken size.
This patch fixes the issue and adds an assert. This assert helped to fix an issue
in one of the test cases.

Differential revision: https://reviews.llvm.org/D81937
2020-06-17 14:26:36 +03:00

6884 lines
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//===- ELFDumper.cpp - ELF-specific dumper --------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file implements the ELF-specific dumper for llvm-readobj.
///
//===----------------------------------------------------------------------===//
#include "ARMEHABIPrinter.h"
#include "DwarfCFIEHPrinter.h"
#include "Error.h"
#include "ObjDumper.h"
#include "StackMapPrinter.h"
#include "llvm-readobj.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/BinaryFormat/AMDGPUMetadataVerifier.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/Demangle/Demangle.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/RelocationResolver.h"
#include "llvm/Object/StackMapParser.h"
#include "llvm/Support/AMDGPUMetadata.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/FormatVariadic.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MipsABIFlags.h"
#include "llvm/Support/RISCVAttributeParser.h"
#include "llvm/Support/RISCVAttributes.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 <unordered_set>
#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_Addr = typename ELFT::Addr; \
using Elf_Shdr = typename ELFT::Shdr; \
using Elf_Sym = typename ELFT::Sym; \
using Elf_Dyn = typename ELFT::Dyn; \
using Elf_Dyn_Range = typename ELFT::DynRange; \
using Elf_Rel = typename ELFT::Rel; \
using Elf_Rela = typename ELFT::Rela; \
using Elf_Relr = typename ELFT::Relr; \
using Elf_Rel_Range = typename ELFT::RelRange; \
using Elf_Rela_Range = typename ELFT::RelaRange; \
using Elf_Relr_Range = typename ELFT::RelrRange; \
using Elf_Phdr = typename ELFT::Phdr; \
using Elf_Half = typename ELFT::Half; \
using Elf_Ehdr = typename ELFT::Ehdr; \
using Elf_Word = typename ELFT::Word; \
using Elf_Hash = typename ELFT::Hash; \
using Elf_GnuHash = typename ELFT::GnuHash; \
using Elf_Note = typename ELFT::Note; \
using Elf_Sym_Range = typename ELFT::SymRange; \
using Elf_Versym = typename ELFT::Versym; \
using Elf_Verneed = typename ELFT::Verneed; \
using Elf_Vernaux = typename ELFT::Vernaux; \
using Elf_Verdef = typename ELFT::Verdef; \
using Elf_Verdaux = typename ELFT::Verdaux; \
using Elf_CGProfile = typename ELFT::CGProfile; \
using uintX_t = typename ELFT::uint;
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(StringRef ObjName) : FileName(ObjName) {}
DynRegionInfo(const void *A, uint64_t S, uint64_t ES, StringRef ObjName)
: Addr(A), Size(S), EntSize(ES), FileName(ObjName) {}
/// Address in current address space.
const void *Addr = nullptr;
/// Size in bytes of the region.
uint64_t Size = 0;
/// Size of each entity in the region.
uint64_t EntSize = 0;
/// Name of the file. Used for error reporting.
StringRef FileName;
/// Error prefix. Used for error reporting to provide more information.
std::string Context;
/// Region size name. Used for error reporting.
StringRef SizePrintName = "size";
/// Entry size name. Used for error reporting. If this field is empty, errors
/// will not mention the entry size.
StringRef EntSizePrintName = "entry size";
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 == 0))
return {Start, Start + (Size / EntSize)};
std::string Msg;
if (!Context.empty())
Msg += Context + " has ";
Msg += ("invalid " + SizePrintName + " (0x" + Twine::utohexstr(Size) + ")")
.str();
if (!EntSizePrintName.empty())
Msg +=
(" or " + EntSizePrintName + " (0x" + Twine::utohexstr(EntSize) + ")")
.str();
reportWarning(createError(Msg.c_str()), FileName);
return {Start, Start};
}
};
namespace {
struct VerdAux {
unsigned Offset;
std::string Name;
};
struct VerDef {
unsigned Offset;
unsigned Version;
unsigned Flags;
unsigned Ndx;
unsigned Cnt;
unsigned Hash;
std::string Name;
std::vector<VerdAux> AuxV;
};
struct VernAux {
unsigned Hash;
unsigned Flags;
unsigned Other;
unsigned Offset;
std::string Name;
};
struct VerNeed {
unsigned Version;
unsigned Cnt;
unsigned Offset;
std::string File;
std::vector<VernAux> AuxV;
};
} // namespace
template <typename ELFT> class ELFDumper : public ObjDumper {
public:
ELFDumper(const object::ELFObjectFile<ELFT> *ObjF, ScopedPrinter &Writer);
void printFileHeaders() override;
void printSectionHeaders() override;
void printRelocations() override;
void printDependentLibs() override;
void printDynamicRelocations() override;
void printSymbols(bool PrintSymbols, bool PrintDynamicSymbols) override;
void printHashSymbols() override;
void printUnwindInfo() override;
void printDynamicTable() override;
void printNeededLibraries() override;
void printProgramHeaders(bool PrintProgramHeaders,
cl::boolOrDefault PrintSectionMapping) override;
void printHashTable() override;
void printGnuHashTable(const object::ObjectFile *Obj) override;
void printLoadName() override;
void printVersionInfo() override;
void printGroupSections() override;
void printArchSpecificInfo() override;
void printStackMap() const override;
void printHashHistograms() override;
void printCGProfile() override;
void printAddrsig() override;
void printNotes() override;
void printELFLinkerOptions() override;
void printStackSizes() override;
const object::ELFObjectFile<ELFT> *getElfObject() const { return ObjF; };
private:
std::unique_ptr<DumpStyle<ELFT>> ELFDumperStyle;
TYPEDEF_ELF_TYPES(ELFT)
DynRegionInfo checkDRI(DynRegionInfo DRI) {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
if (DRI.Addr < Obj->base() ||
reinterpret_cast<const uint8_t *>(DRI.Addr) + DRI.Size >
Obj->base() + Obj->getBufSize())
reportError(errorCodeToError(llvm::object::object_error::parse_failed),
ObjF->getFileName());
return DRI;
}
DynRegionInfo createDRIFrom(const Elf_Phdr *P, uintX_t EntSize) {
return checkDRI({ObjF->getELFFile()->base() + P->p_offset, P->p_filesz,
EntSize, ObjF->getFileName()});
}
DynRegionInfo createDRIFrom(const Elf_Shdr *S) {
return checkDRI({ObjF->getELFFile()->base() + S->sh_offset, S->sh_size,
S->sh_entsize, ObjF->getFileName()});
}
void printAttributes();
void printMipsReginfo();
void printMipsOptions();
std::pair<const Elf_Phdr *, const Elf_Shdr *>
findDynamic(const ELFFile<ELFT> *Obj);
void loadDynamicTable(const ELFFile<ELFT> *Obj);
void parseDynamicTable(const ELFFile<ELFT> *Obj);
Expected<StringRef> getSymbolVersion(const Elf_Sym *symb,
bool &IsDefault) const;
Error LoadVersionMap() const;
const object::ELFObjectFile<ELFT> *ObjF;
DynRegionInfo DynRelRegion;
DynRegionInfo DynRelaRegion;
DynRegionInfo DynRelrRegion;
DynRegionInfo DynPLTRelRegion;
Optional<DynRegionInfo> DynSymRegion;
DynRegionInfo DynamicTable;
StringRef DynamicStringTable;
StringRef SOName = "<Not found>";
const Elf_Hash *HashTable = nullptr;
const Elf_GnuHash *GnuHashTable = nullptr;
const Elf_Shdr *DotSymtabSec = nullptr;
const Elf_Shdr *DotCGProfileSec = nullptr;
const Elf_Shdr *DotAddrsigSec = nullptr;
StringRef DynSymtabName;
ArrayRef<Elf_Word> ShndxTable;
const Elf_Shdr *SymbolVersionSection = nullptr; // .gnu.version
const Elf_Shdr *SymbolVersionNeedSection = nullptr; // .gnu.version_r
const Elf_Shdr *SymbolVersionDefSection = nullptr; // .gnu.version_d
struct VersionEntry {
std::string Name;
bool IsVerDef;
};
mutable SmallVector<Optional<VersionEntry>, 16> VersionMap;
std::unordered_set<std::string> Warnings;
public:
Elf_Dyn_Range dynamic_table() const {
// A valid .dynamic section contains an array of entries terminated
// with a DT_NULL entry. However, sometimes the section content may
// continue past the DT_NULL entry, so to dump the section correctly,
// we first find the end of the entries by iterating over them.
Elf_Dyn_Range Table = DynamicTable.getAsArrayRef<Elf_Dyn>();
size_t Size = 0;
while (Size < Table.size())
if (Table[Size++].getTag() == DT_NULL)
break;
return Table.slice(0, Size);
}
Elf_Sym_Range dynamic_symbols() const {
if (!DynSymRegion)
return Elf_Sym_Range();
return DynSymRegion->getAsArrayRef<Elf_Sym>();
}
Elf_Rel_Range dyn_rels() const;
Elf_Rela_Range dyn_relas() const;
Elf_Relr_Range dyn_relrs() const;
std::string getFullSymbolName(const Elf_Sym *Symbol, StringRef StrTable,
bool IsDynamic) const;
Expected<unsigned> getSymbolSectionIndex(const Elf_Sym *Symbol,
const Elf_Sym *FirstSym) const;
Expected<StringRef> getSymbolSectionName(const Elf_Sym *Symbol,
unsigned SectionIndex) const;
Expected<std::string> getStaticSymbolName(uint32_t Index) const;
StringRef getDynamicString(uint64_t Value) const;
Expected<StringRef> getSymbolVersionByIndex(uint32_t VersionSymbolIndex,
bool &IsDefault) const;
void printSymbolsHelper(bool IsDynamic) const;
std::string getDynamicEntry(uint64_t Type, uint64_t Value) const;
const Elf_Shdr *getDotSymtabSec() const { return DotSymtabSec; }
const Elf_Shdr *getDotCGProfileSec() const { return DotCGProfileSec; }
const Elf_Shdr *getDotAddrsigSec() const { return DotAddrsigSec; }
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 &getDynRelrRegion() const { return DynRelrRegion; }
const DynRegionInfo &getDynPLTRelRegion() const { return DynPLTRelRegion; }
const DynRegionInfo &getDynamicTableRegion() const { return DynamicTable; }
const Elf_Hash *getHashTable() const { return HashTable; }
const Elf_GnuHash *getGnuHashTable() const { return GnuHashTable; }
Expected<ArrayRef<Elf_Versym>> getVersionTable(const Elf_Shdr *Sec,
ArrayRef<Elf_Sym> *SymTab,
StringRef *StrTab) const;
Expected<std::vector<VerDef>>
getVersionDefinitions(const Elf_Shdr *Sec) const;
Expected<std::vector<VerNeed>>
getVersionDependencies(const Elf_Shdr *Sec) const;
Expected<std::pair<const Elf_Sym *, std::string>>
getRelocationTarget(const Elf_Shdr *SymTab, const Elf_Rela &R) const;
std::function<Error(const Twine &Msg)> WarningHandler;
void reportUniqueWarning(Error Err) const;
};
template <class ELFT>
static Expected<StringRef> getLinkAsStrtab(const ELFFile<ELFT> *Obj,
const typename ELFT::Shdr *Sec,
unsigned SecNdx) {
Expected<const typename ELFT::Shdr *> StrTabSecOrErr =
Obj->getSection(Sec->sh_link);
if (!StrTabSecOrErr)
return createError("invalid section linked to " +
object::getELFSectionTypeName(
Obj->getHeader()->e_machine, Sec->sh_type) +
" section with index " + Twine(SecNdx) + ": " +
toString(StrTabSecOrErr.takeError()));
Expected<StringRef> StrTabOrErr = Obj->getStringTable(*StrTabSecOrErr);
if (!StrTabOrErr)
return createError("invalid string table linked to " +
object::getELFSectionTypeName(
Obj->getHeader()->e_machine, Sec->sh_type) +
" section with index " + Twine(SecNdx) + ": " +
toString(StrTabOrErr.takeError()));
return *StrTabOrErr;
}
// Returns the linked symbol table and associated string table for a given section.
template <class ELFT>
static Expected<std::pair<typename ELFT::SymRange, StringRef>>
getLinkAsSymtab(const ELFFile<ELFT> *Obj, const typename ELFT::Shdr *Sec,
unsigned SecNdx, unsigned ExpectedType) {
Expected<const typename ELFT::Shdr *> SymtabOrErr =
Obj->getSection(Sec->sh_link);
if (!SymtabOrErr)
return createError("invalid section linked to " +
object::getELFSectionTypeName(
Obj->getHeader()->e_machine, Sec->sh_type) +
" section with index " + Twine(SecNdx) + ": " +
toString(SymtabOrErr.takeError()));
if ((*SymtabOrErr)->sh_type != ExpectedType)
return createError(
"invalid section linked to " +
object::getELFSectionTypeName(Obj->getHeader()->e_machine,
Sec->sh_type) +
" section with index " + Twine(SecNdx) + ": expected " +
object::getELFSectionTypeName(Obj->getHeader()->e_machine,
ExpectedType) +
", but got " +
object::getELFSectionTypeName(Obj->getHeader()->e_machine,
(*SymtabOrErr)->sh_type));
Expected<StringRef> StrTabOrErr =
getLinkAsStrtab(Obj, *SymtabOrErr, Sec->sh_link);
if (!StrTabOrErr)
return createError(
"can't get a string table for the symbol table linked to " +
object::getELFSectionTypeName(Obj->getHeader()->e_machine,
Sec->sh_type) +
" section with index " + Twine(SecNdx) + ": " +
toString(StrTabOrErr.takeError()));
Expected<typename ELFT::SymRange> SymsOrErr = Obj->symbols(*SymtabOrErr);
if (!SymsOrErr)
return createError(
"unable to read symbols from the symbol table with index " +
Twine(Sec->sh_link) + ": " + toString(SymsOrErr.takeError()));
return std::make_pair(*SymsOrErr, *StrTabOrErr);
}
template <class ELFT>
Expected<ArrayRef<typename ELFT::Versym>>
ELFDumper<ELFT>::getVersionTable(const Elf_Shdr *Sec, ArrayRef<Elf_Sym> *SymTab,
StringRef *StrTab) const {
assert((!SymTab && !StrTab) || (SymTab && StrTab));
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
unsigned SecNdx = Sec - &cantFail(Obj->sections()).front();
if (uintptr_t(Obj->base() + Sec->sh_offset) % sizeof(uint16_t) != 0)
return createError("the SHT_GNU_versym section with index " +
Twine(SecNdx) + " is misaligned");
Expected<ArrayRef<Elf_Versym>> VersionsOrErr =
Obj->template getSectionContentsAsArray<Elf_Versym>(Sec);
if (!VersionsOrErr)
return createError(
"cannot read content of SHT_GNU_versym section with index " +
Twine(SecNdx) + ": " + toString(VersionsOrErr.takeError()));
Expected<std::pair<ArrayRef<Elf_Sym>, StringRef>> SymTabOrErr =
getLinkAsSymtab(Obj, Sec, SecNdx, SHT_DYNSYM);
if (!SymTabOrErr) {
reportUniqueWarning(SymTabOrErr.takeError());
return *VersionsOrErr;
}
if (SymTabOrErr->first.size() != VersionsOrErr->size())
reportUniqueWarning(
createError("SHT_GNU_versym section with index " + Twine(SecNdx) +
": the number of entries (" + Twine(VersionsOrErr->size()) +
") does not match the number of symbols (" +
Twine(SymTabOrErr->first.size()) +
") in the symbol table with index " + Twine(Sec->sh_link)));
if (SymTab)
std::tie(*SymTab, *StrTab) = *SymTabOrErr;
return *VersionsOrErr;
}
template <class ELFT>
Expected<std::vector<VerDef>>
ELFDumper<ELFT>::getVersionDefinitions(const Elf_Shdr *Sec) const {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
unsigned SecNdx = Sec - &cantFail(Obj->sections()).front();
Expected<StringRef> StrTabOrErr = getLinkAsStrtab(Obj, Sec, SecNdx);
if (!StrTabOrErr)
return StrTabOrErr.takeError();
Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(Sec);
if (!ContentsOrErr)
return createError(
"cannot read content of SHT_GNU_verdef section with index " +
Twine(SecNdx) + ": " + toString(ContentsOrErr.takeError()));
const uint8_t *Start = ContentsOrErr->data();
const uint8_t *End = Start + ContentsOrErr->size();
auto ExtractNextAux = [&](const uint8_t *&VerdauxBuf,
unsigned VerDefNdx) -> Expected<VerdAux> {
if (VerdauxBuf + sizeof(Elf_Verdaux) > End)
return createError("invalid SHT_GNU_verdef section with index " +
Twine(SecNdx) + ": version definition " +
Twine(VerDefNdx) +
" refers to an auxiliary entry that goes past the end "
"of the section");
auto *Verdaux = reinterpret_cast<const Elf_Verdaux *>(VerdauxBuf);
VerdauxBuf += Verdaux->vda_next;
VerdAux Aux;
Aux.Offset = VerdauxBuf - Start;
if (Verdaux->vda_name <= StrTabOrErr->size())
Aux.Name = std::string(StrTabOrErr->drop_front(Verdaux->vda_name));
else
Aux.Name = "<invalid vda_name: " + to_string(Verdaux->vda_name) + ">";
return Aux;
};
std::vector<VerDef> Ret;
const uint8_t *VerdefBuf = Start;
for (unsigned I = 1; I <= /*VerDefsNum=*/Sec->sh_info; ++I) {
if (VerdefBuf + sizeof(Elf_Verdef) > End)
return createError("invalid SHT_GNU_verdef section with index " +
Twine(SecNdx) + ": version definition " + Twine(I) +
" goes past the end of the section");
if (uintptr_t(VerdefBuf) % sizeof(uint32_t) != 0)
return createError(
"invalid SHT_GNU_verdef section with index " + Twine(SecNdx) +
": found a misaligned version definition entry at offset 0x" +
Twine::utohexstr(VerdefBuf - Start));
unsigned Version = *reinterpret_cast<const Elf_Half *>(VerdefBuf);
if (Version != 1)
return createError("unable to dump SHT_GNU_verdef section with index " +
Twine(SecNdx) + ": version " + Twine(Version) +
" is not yet supported");
const Elf_Verdef *D = reinterpret_cast<const Elf_Verdef *>(VerdefBuf);
VerDef &VD = *Ret.emplace(Ret.end());
VD.Offset = VerdefBuf - Start;
VD.Version = D->vd_version;
VD.Flags = D->vd_flags;
VD.Ndx = D->vd_ndx;
VD.Cnt = D->vd_cnt;
VD.Hash = D->vd_hash;
const uint8_t *VerdauxBuf = VerdefBuf + D->vd_aux;
for (unsigned J = 0; J < D->vd_cnt; ++J) {
if (uintptr_t(VerdauxBuf) % sizeof(uint32_t) != 0)
return createError("invalid SHT_GNU_verdef section with index " +
Twine(SecNdx) +
": found a misaligned auxiliary entry at offset 0x" +
Twine::utohexstr(VerdauxBuf - Start));
Expected<VerdAux> AuxOrErr = ExtractNextAux(VerdauxBuf, I);
if (!AuxOrErr)
return AuxOrErr.takeError();
if (J == 0)
VD.Name = AuxOrErr->Name;
else
VD.AuxV.push_back(*AuxOrErr);
}
VerdefBuf += D->vd_next;
}
return Ret;
}
template <class ELFT>
Expected<std::vector<VerNeed>>
ELFDumper<ELFT>::getVersionDependencies(const Elf_Shdr *Sec) const {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
unsigned SecNdx = Sec - &cantFail(Obj->sections()).front();
StringRef StrTab;
Expected<StringRef> StrTabOrErr = getLinkAsStrtab(Obj, Sec, SecNdx);
if (!StrTabOrErr)
reportUniqueWarning(StrTabOrErr.takeError());
else
StrTab = *StrTabOrErr;
Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(Sec);
if (!ContentsOrErr)
return createError(
"cannot read content of SHT_GNU_verneed section with index " +
Twine(SecNdx) + ": " + toString(ContentsOrErr.takeError()));
const uint8_t *Start = ContentsOrErr->data();
const uint8_t *End = Start + ContentsOrErr->size();
const uint8_t *VerneedBuf = Start;
std::vector<VerNeed> Ret;
for (unsigned I = 1; I <= /*VerneedNum=*/Sec->sh_info; ++I) {
if (VerneedBuf + sizeof(Elf_Verdef) > End)
return createError("invalid SHT_GNU_verneed section with index " +
Twine(SecNdx) + ": version dependency " + Twine(I) +
" goes past the end of the section");
if (uintptr_t(VerneedBuf) % sizeof(uint32_t) != 0)
return createError(
"invalid SHT_GNU_verneed section with index " + Twine(SecNdx) +
": found a misaligned version dependency entry at offset 0x" +
Twine::utohexstr(VerneedBuf - Start));
unsigned Version = *reinterpret_cast<const Elf_Half *>(VerneedBuf);
if (Version != 1)
return createError("unable to dump SHT_GNU_verneed section with index " +
Twine(SecNdx) + ": version " + Twine(Version) +
" is not yet supported");
const Elf_Verneed *Verneed =
reinterpret_cast<const Elf_Verneed *>(VerneedBuf);
VerNeed &VN = *Ret.emplace(Ret.end());
VN.Version = Verneed->vn_version;
VN.Cnt = Verneed->vn_cnt;
VN.Offset = VerneedBuf - Start;
if (Verneed->vn_file < StrTab.size())
VN.File = std::string(StrTab.drop_front(Verneed->vn_file));
else
VN.File = "<corrupt vn_file: " + to_string(Verneed->vn_file) + ">";
const uint8_t *VernauxBuf = VerneedBuf + Verneed->vn_aux;
for (unsigned J = 0; J < Verneed->vn_cnt; ++J) {
if (uintptr_t(VernauxBuf) % sizeof(uint32_t) != 0)
return createError("invalid SHT_GNU_verneed section with index " +
Twine(SecNdx) +
": found a misaligned auxiliary entry at offset 0x" +
Twine::utohexstr(VernauxBuf - Start));
if (VernauxBuf + sizeof(Elf_Vernaux) > End)
return createError(
"invalid SHT_GNU_verneed section with index " + Twine(SecNdx) +
": version dependency " + Twine(I) +
" refers to an auxiliary entry that goes past the end "
"of the section");
const Elf_Vernaux *Vernaux =
reinterpret_cast<const Elf_Vernaux *>(VernauxBuf);
VernAux &Aux = *VN.AuxV.emplace(VN.AuxV.end());
Aux.Hash = Vernaux->vna_hash;
Aux.Flags = Vernaux->vna_flags;
Aux.Other = Vernaux->vna_other;
Aux.Offset = VernauxBuf - Start;
if (StrTab.size() <= Vernaux->vna_name)
Aux.Name = "<corrupt>";
else
Aux.Name = std::string(StrTab.drop_front(Vernaux->vna_name));
VernauxBuf += Vernaux->vna_next;
}
VerneedBuf += Verneed->vn_next;
}
return Ret;
}
template <class ELFT>
void ELFDumper<ELFT>::printSymbolsHelper(bool IsDynamic) const {
StringRef StrTable, SymtabName;
size_t Entries = 0;
Elf_Sym_Range Syms(nullptr, nullptr);
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
if (IsDynamic) {
StrTable = DynamicStringTable;
Syms = dynamic_symbols();
SymtabName = DynSymtabName;
if (DynSymRegion)
Entries = DynSymRegion->Size / DynSymRegion->EntSize;
} else {
if (!DotSymtabSec)
return;
StrTable = unwrapOrError(ObjF->getFileName(),
Obj->getStringTableForSymtab(*DotSymtabSec));
Syms = unwrapOrError(ObjF->getFileName(), Obj->symbols(DotSymtabSec));
SymtabName =
unwrapOrError(ObjF->getFileName(), Obj->getSectionName(DotSymtabSec));
Entries = DotSymtabSec->getEntityCount();
}
if (Syms.begin() == Syms.end())
return;
// The st_other field has 2 logical parts. The first two bits hold the symbol
// visibility (STV_*) and the remainder hold other platform-specific values.
bool NonVisibilityBitsUsed = llvm::find_if(Syms, [](const Elf_Sym &S) {
return S.st_other & ~0x3;
}) != Syms.end();
ELFDumperStyle->printSymtabMessage(Obj, SymtabName, Entries,
NonVisibilityBitsUsed);
for (const auto &Sym : Syms)
ELFDumperStyle->printSymbol(Obj, &Sym, Syms.begin(), StrTable, IsDynamic,
NonVisibilityBitsUsed);
}
template <class ELFT> class MipsGOTParser;
template <typename ELFT> class DumpStyle {
public:
using Elf_Shdr = typename ELFT::Shdr;
using Elf_Sym = typename ELFT::Sym;
using Elf_Addr = typename ELFT::Addr;
DumpStyle(ELFDumper<ELFT> *Dumper) : Dumper(Dumper) {
FileName = this->Dumper->getElfObject()->getFileName();
}
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 printSectionHeaders(const ELFFile<ELFT> *Obj) = 0;
virtual void printSymbols(const ELFFile<ELFT> *Obj, bool PrintSymbols,
bool PrintDynamicSymbols) = 0;
virtual void printHashSymbols(const ELFFile<ELFT> *Obj) {}
virtual void printDependentLibs(const ELFFile<ELFT> *Obj) = 0;
virtual void printDynamic(const ELFFile<ELFT> *Obj) {}
virtual void printDynamicRelocations(const ELFFile<ELFT> *Obj) = 0;
virtual void printSymtabMessage(const ELFFile<ELFT> *Obj, StringRef Name,
size_t Offset, bool NonVisibilityBitsUsed) {}
virtual void printSymbol(const ELFFile<ELFT> *Obj, const Elf_Sym *Symbol,
const Elf_Sym *FirstSym, StringRef StrTable,
bool IsDynamic, bool NonVisibilityBitsUsed) = 0;
virtual void printProgramHeaders(const ELFFile<ELFT> *Obj,
bool PrintProgramHeaders,
cl::boolOrDefault PrintSectionMapping) = 0;
virtual void printVersionSymbolSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) = 0;
virtual void printVersionDefinitionSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) = 0;
virtual void printVersionDependencySection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) = 0;
virtual void printHashHistograms(const ELFFile<ELFT> *Obj) = 0;
virtual void printCGProfile(const ELFFile<ELFT> *Obj) = 0;
virtual void printAddrsig(const ELFFile<ELFT> *Obj) = 0;
virtual void printNotes(const ELFFile<ELFT> *Obj) = 0;
virtual void printELFLinkerOptions(const ELFFile<ELFT> *Obj) = 0;
virtual void printStackSizes(const ELFObjectFile<ELFT> *Obj) = 0;
void printNonRelocatableStackSizes(const ELFObjectFile<ELFT> *Obj,
std::function<void()> PrintHeader);
void printRelocatableStackSizes(const ELFObjectFile<ELFT> *Obj,
std::function<void()> PrintHeader);
void printFunctionStackSize(const ELFObjectFile<ELFT> *Obj, uint64_t SymValue,
Optional<SectionRef> FunctionSec,
const StringRef SectionName, DataExtractor Data,
uint64_t *Offset);
void printStackSize(const ELFObjectFile<ELFT> *Obj, RelocationRef Rel,
SectionRef FunctionSec,
const StringRef &StackSizeSectionName,
const RelocationResolver &Resolver, DataExtractor Data);
virtual void printStackSizeEntry(uint64_t Size, StringRef FuncName) = 0;
virtual void printMipsGOT(const MipsGOTParser<ELFT> &Parser) = 0;
virtual void printMipsPLT(const MipsGOTParser<ELFT> &Parser) = 0;
virtual void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) = 0;
const ELFDumper<ELFT> *dumper() const { return Dumper; }
protected:
void printDependentLibsHelper(
const ELFFile<ELFT> *Obj,
function_ref<void(const Elf_Shdr &)> OnSectionStart,
function_ref<void(StringRef, uint64_t)> OnSectionEntry);
void reportUniqueWarning(Error Err) const;
StringRef FileName;
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(static_cast<formatted_raw_ostream&>(W.getOStream())) {
assert (&W.getOStream() == &llvm::fouts());
}
void printFileHeaders(const ELFO *Obj) override;
void printGroupSections(const ELFFile<ELFT> *Obj) override;
void printRelocations(const ELFO *Obj) override;
void printSectionHeaders(const ELFO *Obj) override;
void printSymbols(const ELFO *Obj, bool PrintSymbols,
bool PrintDynamicSymbols) override;
void printHashSymbols(const ELFO *Obj) override;
void printDependentLibs(const ELFFile<ELFT> *Obj) override;
void printDynamic(const ELFFile<ELFT> *Obj) override;
void printDynamicRelocations(const ELFO *Obj) override;
void printSymtabMessage(const ELFO *Obj, StringRef Name, size_t Offset,
bool NonVisibilityBitsUsed) override;
void printProgramHeaders(const ELFO *Obj, bool PrintProgramHeaders,
cl::boolOrDefault PrintSectionMapping) override;
void printVersionSymbolSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) override;
void printVersionDefinitionSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) override;
void printVersionDependencySection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) override;
void printHashHistograms(const ELFFile<ELFT> *Obj) override;
void printCGProfile(const ELFFile<ELFT> *Obj) override;
void printAddrsig(const ELFFile<ELFT> *Obj) override;
void printNotes(const ELFFile<ELFT> *Obj) override;
void printELFLinkerOptions(const ELFFile<ELFT> *Obj) override;
void printStackSizes(const ELFObjectFile<ELFT> *Obj) override;
void printStackSizeEntry(uint64_t Size, StringRef FuncName) override;
void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override;
void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override;
void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) override;
private:
void printHashHistogram(const Elf_Hash &HashTable);
void printGnuHashHistogram(const Elf_GnuHash &GnuHashTable);
struct Field {
std::string Str;
unsigned Column;
Field(StringRef S, unsigned Col) : Str(std::string(S)), Column(Col) {}
Field(unsigned Col) : 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 std::string(EnumItem.AltName);
return to_hexString(Value, false);
}
template <typename T, typename TEnum>
std::string printFlags(T Value, ArrayRef<EnumEntry<TEnum>> EnumValues,
TEnum EnumMask1 = {}, TEnum EnumMask2 = {},
TEnum EnumMask3 = {}) {
std::string Str;
for (const auto &Flag : EnumValues) {
if (Flag.Value == 0)
continue;
TEnum EnumMask{};
if (Flag.Value & EnumMask1)
EnumMask = EnumMask1;
else if (Flag.Value & EnumMask2)
EnumMask = EnumMask2;
else if (Flag.Value & EnumMask3)
EnumMask = EnumMask3;
bool IsEnum = (Flag.Value & EnumMask) != 0;
if ((!IsEnum && (Value & Flag.Value) == Flag.Value) ||
(IsEnum && (Value & EnumMask) == Flag.Value)) {
if (!Str.empty())
Str += ", ";
Str += Flag.AltName;
}
}
return Str;
}
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 printRelocHeader(unsigned SType);
void printRelocation(const ELFO *Obj, unsigned SecIndex,
const Elf_Shdr *SymTab, const Elf_Rela &R,
unsigned RelIndex, bool IsRela);
void printRelocation(const ELFO *Obj, const Elf_Sym *Sym,
StringRef SymbolName, const Elf_Rela &R, bool IsRela);
void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First,
StringRef StrTable, bool IsDynamic,
bool NonVisibilityBitsUsed) 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);
void printProgramHeaders(const ELFO *Obj);
void printSectionMapping(const ELFO *Obj);
void printGNUVersionSectionProlog(const ELFFile<ELFT> *Obj,
const typename ELFT::Shdr *Sec,
const Twine &Label, unsigned EntriesNum);
};
template <class ELFT>
void ELFDumper<ELFT>::reportUniqueWarning(Error Err) const {
handleAllErrors(std::move(Err), [&](const ErrorInfoBase &EI) {
cantFail(WarningHandler(EI.message()),
"WarningHandler should always return ErrorSuccess");
});
}
template <class ELFT>
void DumpStyle<ELFT>::reportUniqueWarning(Error Err) const {
this->dumper()->reportUniqueWarning(std::move(Err));
}
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 printSectionHeaders(const ELFO *Obj) override;
void printSymbols(const ELFO *Obj, bool PrintSymbols,
bool PrintDynamicSymbols) override;
void printDependentLibs(const ELFFile<ELFT> *Obj) override;
void printDynamic(const ELFFile<ELFT> *Obj) override;
void printDynamicRelocations(const ELFO *Obj) override;
void printProgramHeaders(const ELFO *Obj, bool PrintProgramHeaders,
cl::boolOrDefault PrintSectionMapping) override;
void printVersionSymbolSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) override;
void printVersionDefinitionSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) override;
void printVersionDependencySection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) override;
void printHashHistograms(const ELFFile<ELFT> *Obj) override;
void printCGProfile(const ELFFile<ELFT> *Obj) override;
void printAddrsig(const ELFFile<ELFT> *Obj) override;
void printNotes(const ELFFile<ELFT> *Obj) override;
void printELFLinkerOptions(const ELFFile<ELFT> *Obj) override;
void printStackSizes(const ELFObjectFile<ELFT> *Obj) override;
void printStackSizeEntry(uint64_t Size, StringRef FuncName) override;
void printMipsGOT(const MipsGOTParser<ELFT> &Parser) override;
void printMipsPLT(const MipsGOTParser<ELFT> &Parser) override;
void printMipsABIFlags(const ELFObjectFile<ELFT> *Obj) override;
private:
void printRelocation(const ELFO *Obj, unsigned SecIndex, Elf_Rela Rel,
unsigned RelIndex, const Elf_Shdr *SymTab);
void printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel);
void printSymbols(const ELFO *Obj);
void printDynamicSymbols(const ELFO *Obj);
void printSymbolSection(const Elf_Sym *Symbol, const Elf_Sym *First);
void printSymbol(const ELFO *Obj, const Elf_Sym *Symbol, const Elf_Sym *First,
StringRef StrTable, bool IsDynamic,
bool /*NonVisibilityBitsUsed*/) override;
void printProgramHeaders(const ELFO *Obj);
void printSectionMapping(const ELFO *Obj) {}
ScopedPrinter &W;
};
} // end anonymous namespace
namespace llvm {
template <class ELFT>
static std::error_code createELFDumper(const ELFObjectFile<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, Writer, Result);
// Big-endian 32-bit
if (const ELF32BEObjectFile *ELFObj = dyn_cast<ELF32BEObjectFile>(Obj))
return createELFDumper(ELFObj, Writer, Result);
// Little-endian 64-bit
if (const ELF64LEObjectFile *ELFObj = dyn_cast<ELF64LEObjectFile>(Obj))
return createELFDumper(ELFObj, Writer, Result);
// Big-endian 64-bit
if (const ELF64BEObjectFile *ELFObj = dyn_cast<ELF64BEObjectFile>(Obj))
return createELFDumper(ELFObj, Writer, Result);
return readobj_error::unsupported_obj_file_format;
}
} // end namespace llvm
template <class ELFT> Error ELFDumper<ELFT>::LoadVersionMap() const {
// If there is no dynamic symtab or version table, there is nothing to do.
if (!DynSymRegion || !SymbolVersionSection)
return Error::success();
// Has the VersionMap already been loaded?
if (!VersionMap.empty())
return Error::success();
// The first two version indexes are reserved.
// Index 0 is LOCAL, index 1 is GLOBAL.
VersionMap.push_back(VersionEntry());
VersionMap.push_back(VersionEntry());
auto InsertEntry = [this](unsigned N, StringRef Version, bool IsVerdef) {
if (N >= VersionMap.size())
VersionMap.resize(N + 1);
VersionMap[N] = {std::string(Version), IsVerdef};
};
if (SymbolVersionDefSection) {
Expected<std::vector<VerDef>> Defs =
this->getVersionDefinitions(SymbolVersionDefSection);
if (!Defs)
return Defs.takeError();
for (const VerDef &Def : *Defs)
InsertEntry(Def.Ndx & ELF::VERSYM_VERSION, Def.Name, true);
}
if (SymbolVersionNeedSection) {
Expected<std::vector<VerNeed>> Deps =
this->getVersionDependencies(SymbolVersionNeedSection);
if (!Deps)
return Deps.takeError();
for (const VerNeed &Dep : *Deps)
for (const VernAux &Aux : Dep.AuxV)
InsertEntry(Aux.Other & ELF::VERSYM_VERSION, Aux.Name, false);
}
return Error::success();
}
template <typename ELFT>
Expected<StringRef> ELFDumper<ELFT>::getSymbolVersion(const Elf_Sym *Sym,
bool &IsDefault) const {
// This is a dynamic symbol. Look in the GNU symbol version table.
if (!SymbolVersionSection) {
// No version table.
IsDefault = false;
return "";
}
assert(DynSymRegion && "DynSymRegion has not been initialised");
// Determine the position in the symbol table of this entry.
size_t EntryIndex = (reinterpret_cast<uintptr_t>(Sym) -
reinterpret_cast<uintptr_t>(DynSymRegion->Addr)) /
sizeof(Elf_Sym);
// Get the corresponding version index entry.
const Elf_Versym *Versym = unwrapOrError(
ObjF->getFileName(), ObjF->getELFFile()->template getEntry<Elf_Versym>(
SymbolVersionSection, EntryIndex));
return this->getSymbolVersionByIndex(Versym->vs_index, IsDefault);
}
template <typename ELFT>
Expected<std::pair<const typename ELFT::Sym *, std::string>>
ELFDumper<ELFT>::getRelocationTarget(const Elf_Shdr *SymTab,
const Elf_Rela &R) const {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
Expected<const Elf_Sym *> SymOrErr = Obj->getRelocationSymbol(&R, SymTab);
if (!SymOrErr)
return SymOrErr.takeError();
const Elf_Sym *Sym = *SymOrErr;
if (!Sym)
return std::make_pair(nullptr, "");
// The st_name field of a STT_SECTION is usually 0 (empty string).
// This code block returns the section name.
if (Sym->getType() == ELF::STT_SECTION) {
Expected<const Elf_Shdr *> SecOrErr =
Obj->getSection(Sym, SymTab, ShndxTable);
if (!SecOrErr)
return SecOrErr.takeError();
// A section symbol describes the section at index 0.
if (*SecOrErr == nullptr)
return std::make_pair(Sym, "");
Expected<StringRef> NameOrErr = Obj->getSectionName(*SecOrErr);
if (!NameOrErr)
return NameOrErr.takeError();
return std::make_pair(Sym, NameOrErr->str());
}
Expected<StringRef> StrTableOrErr = Obj->getStringTableForSymtab(*SymTab);
if (!StrTableOrErr)
return StrTableOrErr.takeError();
std::string SymbolName =
getFullSymbolName(Sym, *StrTableOrErr, SymTab->sh_type == SHT_DYNSYM);
return std::make_pair(Sym, SymbolName);
}
static std::string maybeDemangle(StringRef Name) {
return opts::Demangle ? demangle(std::string(Name)) : Name.str();
}
template <typename ELFT>
Expected<std::string>
ELFDumper<ELFT>::getStaticSymbolName(uint32_t Index) const {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
Expected<const typename ELFT::Sym *> SymOrErr =
Obj->getSymbol(DotSymtabSec, Index);
if (!SymOrErr)
return SymOrErr.takeError();
Expected<StringRef> StrTabOrErr = Obj->getStringTableForSymtab(*DotSymtabSec);
if (!StrTabOrErr)
return StrTabOrErr.takeError();
Expected<StringRef> NameOrErr = (*SymOrErr)->getName(*StrTabOrErr);
if (!NameOrErr)
return NameOrErr.takeError();
return maybeDemangle(*NameOrErr);
}
template <typename ELFT>
Expected<StringRef>
ELFDumper<ELFT>::getSymbolVersionByIndex(uint32_t SymbolVersionIndex,
bool &IsDefault) const {
size_t VersionIndex = SymbolVersionIndex & VERSYM_VERSION;
// Special markers for unversioned symbols.
if (VersionIndex == VER_NDX_LOCAL || VersionIndex == VER_NDX_GLOBAL) {
IsDefault = false;
return "";
}
// Lookup this symbol in the version table.
if (Error E = LoadVersionMap())
return std::move(E);
if (VersionIndex >= VersionMap.size() || !VersionMap[VersionIndex])
return createError("SHT_GNU_versym section refers to a version index " +
Twine(VersionIndex) + " which is missing");
const VersionEntry &Entry = *VersionMap[VersionIndex];
if (Entry.IsVerDef)
IsDefault = !(SymbolVersionIndex & VERSYM_HIDDEN);
else
IsDefault = false;
return Entry.Name.c_str();
}
template <typename ELFT>
std::string ELFDumper<ELFT>::getFullSymbolName(const Elf_Sym *Symbol,
StringRef StrTable,
bool IsDynamic) const {
std::string SymbolName = maybeDemangle(
unwrapOrError(ObjF->getFileName(), Symbol->getName(StrTable)));
if (SymbolName.empty() && Symbol->getType() == ELF::STT_SECTION) {
Elf_Sym_Range Syms = unwrapOrError(
ObjF->getFileName(), ObjF->getELFFile()->symbols(DotSymtabSec));
Expected<unsigned> SectionIndex =
getSymbolSectionIndex(Symbol, Syms.begin());
if (!SectionIndex) {
reportUniqueWarning(SectionIndex.takeError());
return "<?>";
}
Expected<StringRef> NameOrErr = getSymbolSectionName(Symbol, *SectionIndex);
if (!NameOrErr) {
reportUniqueWarning(NameOrErr.takeError());
return ("<section " + Twine(*SectionIndex) + ">").str();
}
return std::string(*NameOrErr);
}
if (!IsDynamic)
return SymbolName;
bool IsDefault;
Expected<StringRef> VersionOrErr = getSymbolVersion(&*Symbol, IsDefault);
if (!VersionOrErr) {
reportUniqueWarning(VersionOrErr.takeError());
return SymbolName + "@<corrupt>";
}
if (!VersionOrErr->empty()) {
SymbolName += (IsDefault ? "@@" : "@");
SymbolName += *VersionOrErr;
}
return SymbolName;
}
template <typename ELFT>
Expected<unsigned>
ELFDumper<ELFT>::getSymbolSectionIndex(const Elf_Sym *Symbol,
const Elf_Sym *FirstSym) const {
return Symbol->st_shndx == SHN_XINDEX
? object::getExtendedSymbolTableIndex<ELFT>(Symbol, FirstSym,
ShndxTable)
: Symbol->st_shndx;
}
// If the Symbol has a reserved st_shndx other than SHN_XINDEX, return a
// descriptive interpretation of the st_shndx value. Otherwise, return the name
// of the section with index SectionIndex. This function assumes that if the
// Symbol has st_shndx == SHN_XINDEX the SectionIndex will be the value derived
// from the SHT_SYMTAB_SHNDX section.
template <typename ELFT>
Expected<StringRef>
ELFDumper<ELFT>::getSymbolSectionName(const Elf_Sym *Symbol,
unsigned SectionIndex) const {
if (Symbol->isUndefined())
return "Undefined";
if (Symbol->isProcessorSpecific())
return "Processor Specific";
if (Symbol->isOSSpecific())
return "Operating System Specific";
if (Symbol->isAbsolute())
return "Absolute";
if (Symbol->isCommon())
return "Common";
if (Symbol->isReserved() && Symbol->st_shndx != SHN_XINDEX)
return "Reserved";
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
Expected<const Elf_Shdr *> SecOrErr =
Obj->getSection(SectionIndex);
if (!SecOrErr)
return SecOrErr.takeError();
return Obj->getSectionName(*SecOrErr);
}
template <class ELFO>
static const typename ELFO::Elf_Shdr *
findNotEmptySectionByAddress(const ELFO *Obj, StringRef FileName,
uint64_t Addr) {
for (const auto &Shdr : unwrapOrError(FileName, 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 FileName, StringRef Name) {
for (const auto &Shdr : unwrapOrError(FileName, Obj.sections()))
if (Name == unwrapOrError(FileName, 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},
{"Standalone", "Standalone App", ELF::ELFOSABI_STANDALONE}
};
static const EnumEntry<unsigned> SymVersionFlags[] = {
{"Base", "BASE", VER_FLG_BASE},
{"Weak", "WEAK", VER_FLG_WEAK},
{"Info", "INFO", VER_FLG_INFO}};
static const EnumEntry<unsigned> AMDGPUElfOSABI[] = {
{"AMDGPU_HSA", "AMDGPU - HSA", ELF::ELFOSABI_AMDGPU_HSA},
{"AMDGPU_PAL", "AMDGPU - PAL", ELF::ELFOSABI_AMDGPU_PAL},
{"AMDGPU_MESA3D", "AMDGPU - MESA3D", ELF::ELFOSABI_AMDGPU_MESA3D}
};
static const EnumEntry<unsigned> ARMElfOSABI[] = {
{"ARM", "ARM", ELF::ELFOSABI_ARM}
};
static const EnumEntry<unsigned> C6000ElfOSABI[] = {
{"C6000_ELFABI", "Bare-metal C6000", ELF::ELFOSABI_C6000_ELFABI},
{"C6000_LINUX", "Linux C6000", ELF::ELFOSABI_C6000_LINUX}
};
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"),
// FIXME: Following EM_ECOG1X definitions is dead code since EM_ECOG1X has
// an identical number to EM_ECOG1.
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 Corporation 32-bit microprocessor family"),
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_LANAI, "EM_LANAI"),
ENUM_ENT(EM_BPF, "EM_BPF"),
ENUM_ENT(EM_VE, "NEC SX-Aurora Vector Engine"),
};
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},
{"HIDDEN", "HIDDEN", ELF::STV_HIDDEN},
{"PROTECTED", "PROTECTED", ELF::STV_PROTECTED}};
static const EnumEntry<unsigned> AMDGPUSymbolTypes[] = {
{ "AMDGPU_HSA_KERNEL", ELF::STT_AMDGPU_HSA_KERNEL }
};
static const char *getGroupType(uint32_t Flag) {
if (Flag & ELF::GRP_COMDAT)
return "COMDAT";
else
return "(unknown)";
}
static const EnumEntry<unsigned> ElfSectionFlags[] = {
ENUM_ENT(SHF_WRITE, "W"),
ENUM_ENT(SHF_ALLOC, "A"),
ENUM_ENT(SHF_EXECINSTR, "X"),
ENUM_ENT(SHF_MERGE, "M"),
ENUM_ENT(SHF_STRINGS, "S"),
ENUM_ENT(SHF_INFO_LINK, "I"),
ENUM_ENT(SHF_LINK_ORDER, "L"),
ENUM_ENT(SHF_OS_NONCONFORMING, "O"),
ENUM_ENT(SHF_GROUP, "G"),
ENUM_ENT(SHF_TLS, "T"),
ENUM_ENT(SHF_COMPRESSED, "C"),
ENUM_ENT(SHF_EXCLUDE, "E"),
};
static const EnumEntry<unsigned> ElfXCoreSectionFlags[] = {
ENUM_ENT(XCORE_SHF_CP_SECTION, ""),
ENUM_ENT(XCORE_SHF_DP_SECTION, "")
};
static const EnumEntry<unsigned> ElfARMSectionFlags[] = {
ENUM_ENT(SHF_ARM_PURECODE, "y")
};
static const EnumEntry<unsigned> ElfHexagonSectionFlags[] = {
ENUM_ENT(SHF_HEX_GPREL, "")
};
static const EnumEntry<unsigned> ElfMipsSectionFlags[] = {
ENUM_ENT(SHF_MIPS_NODUPES, ""),
ENUM_ENT(SHF_MIPS_NAMES, ""),
ENUM_ENT(SHF_MIPS_LOCAL, ""),
ENUM_ENT(SHF_MIPS_NOSTRIP, ""),
ENUM_ENT(SHF_MIPS_GPREL, ""),
ENUM_ENT(SHF_MIPS_MERGE, ""),
ENUM_ENT(SHF_MIPS_ADDR, ""),
ENUM_ENT(SHF_MIPS_STRING, "")
};
static const EnumEntry<unsigned> ElfX86_64SectionFlags[] = {
ENUM_ENT(SHF_X86_64_LARGE, "l")
};
static std::vector<EnumEntry<unsigned>>
getSectionFlagsForTarget(unsigned EMachine) {
std::vector<EnumEntry<unsigned>> Ret(std::begin(ElfSectionFlags),
std::end(ElfSectionFlags));
switch (EMachine) {
case EM_ARM:
Ret.insert(Ret.end(), std::begin(ElfARMSectionFlags),
std::end(ElfARMSectionFlags));
break;
case EM_HEXAGON:
Ret.insert(Ret.end(), std::begin(ElfHexagonSectionFlags),
std::end(ElfHexagonSectionFlags));
break;
case EM_MIPS:
Ret.insert(Ret.end(), std::begin(ElfMipsSectionFlags),
std::end(ElfMipsSectionFlags));
break;
case EM_X86_64:
Ret.insert(Ret.end(), std::begin(ElfX86_64SectionFlags),
std::end(ElfX86_64SectionFlags));
break;
case EM_XCORE:
Ret.insert(Ret.end(), std::begin(ElfXCoreSectionFlags),
std::end(ElfXCoreSectionFlags));
break;
default:
break;
}
return Ret;
}
static std::string getGNUFlags(unsigned EMachine, uint64_t Flags) {
// Here we are trying to build the flags string in the same way as GNU does.
// It is not that straightforward. Imagine we have sh_flags == 0x90000000.
// SHF_EXCLUDE ("E") has a value of 0x80000000 and SHF_MASKPROC is 0xf0000000.
// GNU readelf will not print "E" or "Ep" in this case, but will print just
// "p". It only will print "E" when no other processor flag is set.
std::string Str;
bool HasUnknownFlag = false;
bool HasOSFlag = false;
bool HasProcFlag = false;
std::vector<EnumEntry<unsigned>> FlagsList =
getSectionFlagsForTarget(EMachine);
while (Flags) {
// Take the least significant bit as a flag.
uint64_t Flag = Flags & -Flags;
Flags -= Flag;
// Find the flag in the known flags list.
auto I = llvm::find_if(FlagsList, [=](const EnumEntry<unsigned> &E) {
// Flags with empty names are not printed in GNU style output.
return E.Value == Flag && !E.AltName.empty();
});
if (I != FlagsList.end()) {
Str += I->AltName;
continue;
}
// If we did not find a matching regular flag, then we deal with an OS
// specific flag, processor specific flag or an unknown flag.
if (Flag & ELF::SHF_MASKOS) {
HasOSFlag = true;
Flags &= ~ELF::SHF_MASKOS;
} else if (Flag & ELF::SHF_MASKPROC) {
HasProcFlag = true;
// Mask off all the processor-specific bits. This removes the SHF_EXCLUDE
// bit if set so that it doesn't also get printed.
Flags &= ~ELF::SHF_MASKPROC;
} else {
HasUnknownFlag = true;
}
}
// "o", "p" and "x" are printed last.
if (HasOSFlag)
Str += "o";
if (HasProcFlag)
Str += "p";
if (HasUnknownFlag)
Str += "x";
return Str;
}
static const char *getElfSegmentType(unsigned Arch, unsigned Type) {
// Check potentially overlapped processor-specific
// program header type.
switch (Arch) {
case ELF::EM_ARM:
switch (Type) { LLVM_READOBJ_ENUM_CASE(ELF, PT_ARM_EXIDX); }
break;
case ELF::EM_MIPS:
case ELF::EM_MIPS_RS3_LE:
switch (Type) {
LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_REGINFO);
LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_RTPROC);
LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_OPTIONS);
LLVM_READOBJ_ENUM_CASE(ELF, PT_MIPS_ABIFLAGS);
}
break;
}
switch (Type) {
LLVM_READOBJ_ENUM_CASE(ELF, PT_NULL );
LLVM_READOBJ_ENUM_CASE(ELF, PT_LOAD );
LLVM_READOBJ_ENUM_CASE(ELF, PT_DYNAMIC);
LLVM_READOBJ_ENUM_CASE(ELF, PT_INTERP );
LLVM_READOBJ_ENUM_CASE(ELF, PT_NOTE );
LLVM_READOBJ_ENUM_CASE(ELF, PT_SHLIB );
LLVM_READOBJ_ENUM_CASE(ELF, PT_PHDR );
LLVM_READOBJ_ENUM_CASE(ELF, PT_TLS );
LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_EH_FRAME);
LLVM_READOBJ_ENUM_CASE(ELF, PT_SUNW_UNWIND);
LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_STACK);
LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_RELRO);
LLVM_READOBJ_ENUM_CASE(ELF, PT_GNU_PROPERTY);
LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_RANDOMIZE);
LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_WXNEEDED);
LLVM_READOBJ_ENUM_CASE(ELF, PT_OPENBSD_BOOTDATA);
default:
return "";
}
}
static std::string getElfPtType(unsigned Arch, unsigned Type) {
switch (Type) {
LLVM_READOBJ_PHDR_ENUM(ELF, PT_NULL)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_LOAD)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_DYNAMIC)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_INTERP)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_NOTE)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_SHLIB)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_PHDR)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_TLS)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_EH_FRAME)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_SUNW_UNWIND)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_STACK)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_RELRO)
LLVM_READOBJ_PHDR_ENUM(ELF, PT_GNU_PROPERTY)
default:
// All machine specific PT_* types
switch (Arch) {
case ELF::EM_ARM:
if (Type == ELF::PT_ARM_EXIDX)
return "EXIDX";
break;
case ELF::EM_MIPS:
case ELF::EM_MIPS_RS3_LE:
switch (Type) {
case PT_MIPS_REGINFO:
return "REGINFO";
case PT_MIPS_RTPROC:
return "RTPROC";
case PT_MIPS_OPTIONS:
return "OPTIONS";
case PT_MIPS_ABIFLAGS:
return "ABIFLAGS";
}
break;
}
}
return std::string("<unknown>: ") + to_string(format_hex(Type, 1));
}
static const EnumEntry<unsigned> ElfSegmentFlags[] = {
LLVM_READOBJ_ENUM_ENT(ELF, PF_X),
LLVM_READOBJ_ENUM_ENT(ELF, PF_W),
LLVM_READOBJ_ENUM_ENT(ELF, PF_R)
};
static const EnumEntry<unsigned> ElfHeaderMipsFlags[] = {
ENUM_ENT(EF_MIPS_NOREORDER, "noreorder"),
ENUM_ENT(EF_MIPS_PIC, "pic"),
ENUM_ENT(EF_MIPS_CPIC, "cpic"),
ENUM_ENT(EF_MIPS_ABI2, "abi2"),
ENUM_ENT(EF_MIPS_32BITMODE, "32bitmode"),
ENUM_ENT(EF_MIPS_FP64, "fp64"),
ENUM_ENT(EF_MIPS_NAN2008, "nan2008"),
ENUM_ENT(EF_MIPS_ABI_O32, "o32"),
ENUM_ENT(EF_MIPS_ABI_O64, "o64"),
ENUM_ENT(EF_MIPS_ABI_EABI32, "eabi32"),
ENUM_ENT(EF_MIPS_ABI_EABI64, "eabi64"),
ENUM_ENT(EF_MIPS_MACH_3900, "3900"),
ENUM_ENT(EF_MIPS_MACH_4010, "4010"),
ENUM_ENT(EF_MIPS_MACH_4100, "4100"),
ENUM_ENT(EF_MIPS_MACH_4650, "4650"),
ENUM_ENT(EF_MIPS_MACH_4120, "4120"),
ENUM_ENT(EF_MIPS_MACH_4111, "4111"),
ENUM_ENT(EF_MIPS_MACH_SB1, "sb1"),
ENUM_ENT(EF_MIPS_MACH_OCTEON, "octeon"),
ENUM_ENT(EF_MIPS_MACH_XLR, "xlr"),
ENUM_ENT(EF_MIPS_MACH_OCTEON2, "octeon2"),
ENUM_ENT(EF_MIPS_MACH_OCTEON3, "octeon3"),
ENUM_ENT(EF_MIPS_MACH_5400, "5400"),
ENUM_ENT(EF_MIPS_MACH_5900, "5900"),
ENUM_ENT(EF_MIPS_MACH_5500, "5500"),
ENUM_ENT(EF_MIPS_MACH_9000, "9000"),
ENUM_ENT(EF_MIPS_MACH_LS2E, "loongson-2e"),
ENUM_ENT(EF_MIPS_MACH_LS2F, "loongson-2f"),
ENUM_ENT(EF_MIPS_MACH_LS3A, "loongson-3a"),
ENUM_ENT(EF_MIPS_MICROMIPS, "micromips"),
ENUM_ENT(EF_MIPS_ARCH_ASE_M16, "mips16"),
ENUM_ENT(EF_MIPS_ARCH_ASE_MDMX, "mdmx"),
ENUM_ENT(EF_MIPS_ARCH_1, "mips1"),
ENUM_ENT(EF_MIPS_ARCH_2, "mips2"),
ENUM_ENT(EF_MIPS_ARCH_3, "mips3"),
ENUM_ENT(EF_MIPS_ARCH_4, "mips4"),
ENUM_ENT(EF_MIPS_ARCH_5, "mips5"),
ENUM_ENT(EF_MIPS_ARCH_32, "mips32"),
ENUM_ENT(EF_MIPS_ARCH_64, "mips64"),
ENUM_ENT(EF_MIPS_ARCH_32R2, "mips32r2"),
ENUM_ENT(EF_MIPS_ARCH_64R2, "mips64r2"),
ENUM_ENT(EF_MIPS_ARCH_32R6, "mips32r6"),
ENUM_ENT(EF_MIPS_ARCH_64R6, "mips64r6")
};
static const EnumEntry<unsigned> ElfHeaderAMDGPUFlags[] = {
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_NONE),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R600),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_R630),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RS880),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV670),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV710),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV730),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_RV770),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CEDAR),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CYPRESS),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_JUNIPER),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_REDWOOD),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_SUMO),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_BARTS),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAICOS),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_CAYMAN),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_R600_TURKS),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX600),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX601),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX700),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX701),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX702),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX703),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX704),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX801),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX802),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX803),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX810),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX900),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX902),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX904),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX906),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX908),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX909),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1010),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1011),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1012),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_MACH_AMDGCN_GFX1030),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_XNACK),
LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_SRAM_ECC)
};
static const EnumEntry<unsigned> ElfHeaderRISCVFlags[] = {
ENUM_ENT(EF_RISCV_RVC, "RVC"),
ENUM_ENT(EF_RISCV_FLOAT_ABI_SINGLE, "single-float ABI"),
ENUM_ENT(EF_RISCV_FLOAT_ABI_DOUBLE, "double-float ABI"),
ENUM_ENT(EF_RISCV_FLOAT_ABI_QUAD, "quad-float ABI"),
ENUM_ENT(EF_RISCV_RVE, "RVE")
};
static const EnumEntry<unsigned> ElfSymOtherFlags[] = {
LLVM_READOBJ_ENUM_ENT(ELF, STV_INTERNAL),
LLVM_READOBJ_ENUM_ENT(ELF, STV_HIDDEN),
LLVM_READOBJ_ENUM_ENT(ELF, STV_PROTECTED)
};
static const EnumEntry<unsigned> ElfMipsSymOtherFlags[] = {
LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL),
LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT),
LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PIC),
LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MICROMIPS)
};
static const EnumEntry<unsigned> ElfMips16SymOtherFlags[] = {
LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_OPTIONAL),
LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_PLT),
LLVM_READOBJ_ENUM_ENT(ELF, STO_MIPS_MIPS16)
};
static const char *getElfMipsOptionsOdkType(unsigned Odk) {
switch (Odk) {
LLVM_READOBJ_ENUM_CASE(ELF, ODK_NULL);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_REGINFO);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_EXCEPTIONS);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAD);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWPATCH);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_FILL);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_TAGS);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWAND);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_HWOR);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_GP_GROUP);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_IDENT);
LLVM_READOBJ_ENUM_CASE(ELF, ODK_PAGESIZE);
default:
return "Unknown";
}
}
template <typename ELFT>
std::pair<const typename ELFT::Phdr *, const typename ELFT::Shdr *>
ELFDumper<ELFT>::findDynamic(const ELFFile<ELFT> *Obj) {
// Try to locate the PT_DYNAMIC header.
const Elf_Phdr *DynamicPhdr = nullptr;
for (const Elf_Phdr &Phdr :
unwrapOrError(ObjF->getFileName(), Obj->program_headers())) {
if (Phdr.p_type != ELF::PT_DYNAMIC)
continue;
DynamicPhdr = &Phdr;
break;
}
// Try to locate the .dynamic section in the sections header table.
const Elf_Shdr *DynamicSec = nullptr;
for (const Elf_Shdr &Sec :
unwrapOrError(ObjF->getFileName(), Obj->sections())) {
if (Sec.sh_type != ELF::SHT_DYNAMIC)
continue;
DynamicSec = &Sec;
break;
}
if (DynamicPhdr && DynamicPhdr->p_offset + DynamicPhdr->p_filesz >
ObjF->getMemoryBufferRef().getBufferSize()) {
reportWarning(
createError(
"PT_DYNAMIC segment offset + size exceeds the size of the file"),
ObjF->getFileName());
// Don't use the broken dynamic header.
DynamicPhdr = nullptr;
}
if (DynamicPhdr && DynamicSec) {
StringRef Name =
unwrapOrError(ObjF->getFileName(), Obj->getSectionName(DynamicSec));
if (DynamicSec->sh_addr + DynamicSec->sh_size >
DynamicPhdr->p_vaddr + DynamicPhdr->p_memsz ||
DynamicSec->sh_addr < DynamicPhdr->p_vaddr)
reportWarning(createError("The SHT_DYNAMIC section '" + Name +
"' is not contained within the "
"PT_DYNAMIC segment"),
ObjF->getFileName());
if (DynamicSec->sh_addr != DynamicPhdr->p_vaddr)
reportWarning(createError("The SHT_DYNAMIC section '" + Name +
"' is not at the start of "
"PT_DYNAMIC segment"),
ObjF->getFileName());
}
return std::make_pair(DynamicPhdr, DynamicSec);
}
template <typename ELFT>
void ELFDumper<ELFT>::loadDynamicTable(const ELFFile<ELFT> *Obj) {
const Elf_Phdr *DynamicPhdr;
const Elf_Shdr *DynamicSec;
std::tie(DynamicPhdr, DynamicSec) = findDynamic(Obj);
if (!DynamicPhdr && !DynamicSec)
return;
DynRegionInfo FromPhdr(ObjF->getFileName());
bool IsPhdrTableValid = false;
if (DynamicPhdr) {
FromPhdr = createDRIFrom(DynamicPhdr, sizeof(Elf_Dyn));
FromPhdr.SizePrintName = "PT_DYNAMIC size";
FromPhdr.EntSizePrintName = "";
IsPhdrTableValid = !FromPhdr.getAsArrayRef<Elf_Dyn>().empty();
}
// Locate the dynamic table described in a section header.
// Ignore sh_entsize and use the expected value for entry size explicitly.
// This allows us to dump dynamic sections with a broken sh_entsize
// field.
DynRegionInfo FromSec(ObjF->getFileName());
bool IsSecTableValid = false;
if (DynamicSec) {
FromSec =
checkDRI({ObjF->getELFFile()->base() + DynamicSec->sh_offset,
DynamicSec->sh_size, sizeof(Elf_Dyn), ObjF->getFileName()});
FromSec.Context = ("section with index " +
Twine(DynamicSec - &cantFail(Obj->sections()).front()))
.str();
FromSec.EntSizePrintName = "";
IsSecTableValid = !FromSec.getAsArrayRef<Elf_Dyn>().empty();
}
// When we only have information from one of the SHT_DYNAMIC section header or
// PT_DYNAMIC program header, just use that.
if (!DynamicPhdr || !DynamicSec) {
if ((DynamicPhdr && IsPhdrTableValid) || (DynamicSec && IsSecTableValid)) {
DynamicTable = DynamicPhdr ? FromPhdr : FromSec;
parseDynamicTable(Obj);
} else {
reportWarning(createError("no valid dynamic table was found"),
ObjF->getFileName());
}
return;
}
// At this point we have tables found from the section header and from the
// dynamic segment. Usually they match, but we have to do sanity checks to
// verify that.
if (FromPhdr.Addr != FromSec.Addr)
reportWarning(createError("SHT_DYNAMIC section header and PT_DYNAMIC "
"program header disagree about "
"the location of the dynamic table"),
ObjF->getFileName());
if (!IsPhdrTableValid && !IsSecTableValid) {
reportWarning(createError("no valid dynamic table was found"),
ObjF->getFileName());
return;
}
// Information in the PT_DYNAMIC program header has priority over the information
// in a section header.
if (IsPhdrTableValid) {
if (!IsSecTableValid)
reportWarning(
createError(
"SHT_DYNAMIC dynamic table is invalid: PT_DYNAMIC will be used"),
ObjF->getFileName());
DynamicTable = FromPhdr;
} else {
reportWarning(
createError(
"PT_DYNAMIC dynamic table is invalid: SHT_DYNAMIC will be used"),
ObjF->getFileName());
DynamicTable = FromSec;
}
parseDynamicTable(Obj);
}
template <typename ELFT>
ELFDumper<ELFT>::ELFDumper(const object::ELFObjectFile<ELFT> *ObjF,
ScopedPrinter &Writer)
: ObjDumper(Writer), ObjF(ObjF), DynRelRegion(ObjF->getFileName()),
DynRelaRegion(ObjF->getFileName()), DynRelrRegion(ObjF->getFileName()),
DynPLTRelRegion(ObjF->getFileName()), DynamicTable(ObjF->getFileName()) {
// Dumper reports all non-critical errors as warnings.
// It does not print the same warning more than once.
WarningHandler = [this](const Twine &Msg) {
if (Warnings.insert(Msg.str()).second)
reportWarning(createError(Msg), this->ObjF->getFileName());
return Error::success();
};
if (opts::Output == opts::GNU)
ELFDumperStyle.reset(new GNUStyle<ELFT>(Writer, this));
else
ELFDumperStyle.reset(new LLVMStyle<ELFT>(Writer, this));
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
typename ELFT::ShdrRange Sections =
unwrapOrError(ObjF->getFileName(), Obj->sections());
for (const Elf_Shdr &Sec : Sections) {
switch (Sec.sh_type) {
case ELF::SHT_SYMTAB:
if (!DotSymtabSec)
DotSymtabSec = &Sec;
break;
case ELF::SHT_DYNSYM:
if (!DynSymRegion) {
DynSymRegion = createDRIFrom(&Sec);
DynSymRegion->Context =
("section with index " + Twine(&Sec - &Sections.front())).str();
// This is only used (if Elf_Shdr present)for naming section in GNU
// style
DynSymtabName =
unwrapOrError(ObjF->getFileName(), Obj->getSectionName(&Sec));
if (Expected<StringRef> E = Obj->getStringTableForSymtab(Sec))
DynamicStringTable = *E;
else
reportWarning(E.takeError(), ObjF->getFileName());
}
break;
case ELF::SHT_SYMTAB_SHNDX:
ShndxTable = unwrapOrError(ObjF->getFileName(), Obj->getSHNDXTable(Sec));
break;
case ELF::SHT_GNU_versym:
if (!SymbolVersionSection)
SymbolVersionSection = &Sec;
break;
case ELF::SHT_GNU_verdef:
if (!SymbolVersionDefSection)
SymbolVersionDefSection = &Sec;
break;
case ELF::SHT_GNU_verneed:
if (!SymbolVersionNeedSection)
SymbolVersionNeedSection = &Sec;
break;
case ELF::SHT_LLVM_CALL_GRAPH_PROFILE:
if (!DotCGProfileSec)
DotCGProfileSec = &Sec;
break;
case ELF::SHT_LLVM_ADDRSIG:
if (!DotAddrsigSec)
DotAddrsigSec = &Sec;
break;
}
}
loadDynamicTable(Obj);
}
template <typename ELFT>
void ELFDumper<ELFT>::parseDynamicTable(const ELFFile<ELFT> *Obj) {
auto toMappedAddr = [&](uint64_t Tag, uint64_t VAddr) -> const uint8_t * {
auto MappedAddrOrError = ObjF->getELFFile()->toMappedAddr(VAddr);
if (!MappedAddrOrError) {
Error Err =
createError("Unable to parse DT_" + Obj->getDynamicTagAsString(Tag) +
": " + llvm::toString(MappedAddrOrError.takeError()));
reportWarning(std::move(Err), ObjF->getFileName());
return nullptr;
}
return MappedAddrOrError.get();
};
uint64_t SONameOffset = 0;
const char *StringTableBegin = nullptr;
uint64_t StringTableSize = 0;
Optional<DynRegionInfo> DynSymFromTable;
for (const Elf_Dyn &Dyn : dynamic_table()) {
switch (Dyn.d_tag) {
case ELF::DT_HASH:
HashTable = reinterpret_cast<const Elf_Hash *>(
toMappedAddr(Dyn.getTag(), Dyn.getPtr()));
break;
case ELF::DT_GNU_HASH:
GnuHashTable = reinterpret_cast<const Elf_GnuHash *>(
toMappedAddr(Dyn.getTag(), Dyn.getPtr()));
break;
case ELF::DT_STRTAB:
StringTableBegin = reinterpret_cast<const char *>(
toMappedAddr(Dyn.getTag(), Dyn.getPtr()));
break;
case ELF::DT_STRSZ:
StringTableSize = Dyn.getVal();
break;
case ELF::DT_SYMTAB: {
// If we can't map the DT_SYMTAB value to an address (e.g. when there are
// no program headers), we ignore its value.
if (const uint8_t *VA = toMappedAddr(Dyn.getTag(), Dyn.getPtr())) {
DynSymFromTable.emplace(ObjF->getFileName());
DynSymFromTable->Addr = VA;
DynSymFromTable->EntSize = sizeof(Elf_Sym);
DynSymFromTable->EntSizePrintName = "";
}
break;
}
case ELF::DT_SYMENT: {
uint64_t Val = Dyn.getVal();
if (Val != sizeof(Elf_Sym))
reportWarning(createError("DT_SYMENT value of 0x" +
Twine::utohexstr(Val) +
" is not the size of a symbol (0x" +
Twine::utohexstr(sizeof(Elf_Sym)) + ")"),
ObjF->getFileName());
break;
}
case ELF::DT_RELA:
DynRelaRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr());
break;
case ELF::DT_RELASZ:
DynRelaRegion.Size = Dyn.getVal();
DynRelaRegion.SizePrintName = "DT_RELASZ value";
break;
case ELF::DT_RELAENT:
DynRelaRegion.EntSize = Dyn.getVal();
DynRelaRegion.EntSizePrintName = "DT_RELAENT value";
break;
case ELF::DT_SONAME:
SONameOffset = Dyn.getVal();
break;
case ELF::DT_REL:
DynRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr());
break;
case ELF::DT_RELSZ:
DynRelRegion.Size = Dyn.getVal();
DynRelRegion.SizePrintName = "DT_RELSZ value";
break;
case ELF::DT_RELENT:
DynRelRegion.EntSize = Dyn.getVal();
DynRelRegion.EntSizePrintName = "DT_RELENT value";
break;
case ELF::DT_RELR:
case ELF::DT_ANDROID_RELR:
DynRelrRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr());
break;
case ELF::DT_RELRSZ:
case ELF::DT_ANDROID_RELRSZ:
DynRelrRegion.Size = Dyn.getVal();
DynRelrRegion.SizePrintName = Dyn.d_tag == ELF::DT_RELRSZ
? "DT_RELRSZ value"
: "DT_ANDROID_RELRSZ value";
break;
case ELF::DT_RELRENT:
case ELF::DT_ANDROID_RELRENT:
DynRelrRegion.EntSize = Dyn.getVal();
DynRelrRegion.EntSizePrintName = Dyn.d_tag == ELF::DT_RELRENT
? "DT_RELRENT value"
: "DT_ANDROID_RELRENT value";
break;
case ELF::DT_PLTREL:
if (Dyn.getVal() == DT_REL)
DynPLTRelRegion.EntSize = sizeof(Elf_Rel);
else if (Dyn.getVal() == DT_RELA)
DynPLTRelRegion.EntSize = sizeof(Elf_Rela);
else
reportError(createError(Twine("unknown DT_PLTREL value of ") +
Twine((uint64_t)Dyn.getVal())),
ObjF->getFileName());
DynPLTRelRegion.EntSizePrintName = "";
break;
case ELF::DT_JMPREL:
DynPLTRelRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr());
break;
case ELF::DT_PLTRELSZ:
DynPLTRelRegion.Size = Dyn.getVal();
DynPLTRelRegion.SizePrintName = "DT_PLTRELSZ value";
break;
}
}
if (StringTableBegin)
DynamicStringTable = StringRef(StringTableBegin, StringTableSize);
SOName = getDynamicString(SONameOffset);
if (DynSymRegion) {
// Often we find the information about the dynamic symbol table
// location in the SHT_DYNSYM section header. However, the value in
// DT_SYMTAB has priority, because it is used by dynamic loaders to
// locate .dynsym at runtime. The location we find in the section header
// and the location we find here should match.
if (DynSymFromTable && DynSymFromTable->Addr != DynSymRegion->Addr)
reportUniqueWarning(
createError("SHT_DYNSYM section header and DT_SYMTAB disagree about "
"the location of the dynamic symbol table"));
// According to the ELF gABI: "The number of symbol table entries should
// equal nchain". Check to see if the DT_HASH hash table nchain value
// conflicts with the number of symbols in the dynamic symbol table
// according to the section header.
if (HashTable &&
HashTable->nchain != DynSymRegion->Size / DynSymRegion->EntSize)
reportUniqueWarning(createError(
"hash table nchain (" + Twine(HashTable->nchain) +
") differs from symbol count derived from SHT_DYNSYM section "
"header (" +
Twine(DynSymRegion->Size / DynSymRegion->EntSize) + ")"));
}
// Delay the creation of the actual dynamic symbol table until now, so that
// checks can always be made against the section header-based properties,
// without worrying about tag order.
if (DynSymFromTable) {
if (!DynSymRegion) {
DynSymRegion = DynSymFromTable;
} else {
DynSymRegion->Addr = DynSymFromTable->Addr;
DynSymRegion->EntSize = DynSymFromTable->EntSize;
DynSymRegion->EntSizePrintName = DynSymFromTable->EntSizePrintName;
}
}
// Derive the dynamic symbol table size from the DT_HASH hash table, if
// present.
if (HashTable && DynSymRegion)
DynSymRegion->Size = HashTable->nchain * DynSymRegion->EntSize;
}
template <typename ELFT>
typename ELFDumper<ELFT>::Elf_Rel_Range ELFDumper<ELFT>::dyn_rels() const {
return DynRelRegion.getAsArrayRef<Elf_Rel>();
}
template <typename ELFT>
typename ELFDumper<ELFT>::Elf_Rela_Range ELFDumper<ELFT>::dyn_relas() const {
return DynRelaRegion.getAsArrayRef<Elf_Rela>();
}
template <typename ELFT>
typename ELFDumper<ELFT>::Elf_Relr_Range ELFDumper<ELFT>::dyn_relrs() const {
return DynRelrRegion.getAsArrayRef<Elf_Relr>();
}
template <class ELFT> void ELFDumper<ELFT>::printFileHeaders() {
ELFDumperStyle->printFileHeaders(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printSectionHeaders() {
ELFDumperStyle->printSectionHeaders(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printRelocations() {
ELFDumperStyle->printRelocations(ObjF->getELFFile());
}
template <class ELFT>
void ELFDumper<ELFT>::printProgramHeaders(
bool PrintProgramHeaders, cl::boolOrDefault PrintSectionMapping) {
ELFDumperStyle->printProgramHeaders(ObjF->getELFFile(), PrintProgramHeaders,
PrintSectionMapping);
}
template <typename ELFT> void ELFDumper<ELFT>::printVersionInfo() {
// Dump version symbol section.
ELFDumperStyle->printVersionSymbolSection(ObjF->getELFFile(),
SymbolVersionSection);
// Dump version definition section.
ELFDumperStyle->printVersionDefinitionSection(ObjF->getELFFile(),
SymbolVersionDefSection);
// Dump version dependency section.
ELFDumperStyle->printVersionDependencySection(ObjF->getELFFile(),
SymbolVersionNeedSection);
}
template <class ELFT> void ELFDumper<ELFT>::printDependentLibs() {
ELFDumperStyle->printDependentLibs(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printDynamicRelocations() {
ELFDumperStyle->printDynamicRelocations(ObjF->getELFFile());
}
template <class ELFT>
void ELFDumper<ELFT>::printSymbols(bool PrintSymbols,
bool PrintDynamicSymbols) {
ELFDumperStyle->printSymbols(ObjF->getELFFile(), PrintSymbols,
PrintDynamicSymbols);
}
template <class ELFT> void ELFDumper<ELFT>::printHashSymbols() {
ELFDumperStyle->printHashSymbols(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printHashHistograms() {
ELFDumperStyle->printHashHistograms(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printCGProfile() {
ELFDumperStyle->printCGProfile(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printNotes() {
ELFDumperStyle->printNotes(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printELFLinkerOptions() {
ELFDumperStyle->printELFLinkerOptions(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printStackSizes() {
ELFDumperStyle->printStackSizes(ObjF);
}
#define LLVM_READOBJ_DT_FLAG_ENT(prefix, enum) \
{ #enum, prefix##_##enum }
static const EnumEntry<unsigned> ElfDynamicDTFlags[] = {
LLVM_READOBJ_DT_FLAG_ENT(DF, ORIGIN),
LLVM_READOBJ_DT_FLAG_ENT(DF, SYMBOLIC),
LLVM_READOBJ_DT_FLAG_ENT(DF, TEXTREL),
LLVM_READOBJ_DT_FLAG_ENT(DF, BIND_NOW),
LLVM_READOBJ_DT_FLAG_ENT(DF, STATIC_TLS)
};
static const EnumEntry<unsigned> ElfDynamicDTFlags1[] = {
LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOW),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAL),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, GROUP),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODELETE),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, LOADFLTR),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, INITFIRST),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOOPEN),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, ORIGIN),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, DIRECT),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, TRANS),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, INTERPOSE),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODEFLIB),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODUMP),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, CONFALT),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, ENDFILTEE),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELDNE),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, DISPRELPND),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, NODIRECT),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, IGNMULDEF),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOKSYMS),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, NOHDR),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, EDITED),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, NORELOC),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, SYMINTPOSE),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, GLOBAUDIT),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, SINGLETON),
LLVM_READOBJ_DT_FLAG_ENT(DF_1, PIE),
};
static const EnumEntry<unsigned> ElfDynamicDTMipsFlags[] = {
LLVM_READOBJ_DT_FLAG_ENT(RHF, NONE),
LLVM_READOBJ_DT_FLAG_ENT(RHF, QUICKSTART),
LLVM_READOBJ_DT_FLAG_ENT(RHF, NOTPOT),
LLVM_READOBJ_DT_FLAG_ENT(RHS, NO_LIBRARY_REPLACEMENT),
LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_MOVE),
LLVM_READOBJ_DT_FLAG_ENT(RHF, SGI_ONLY),
LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_INIT),
LLVM_READOBJ_DT_FLAG_ENT(RHF, DELTA_C_PLUS_PLUS),
LLVM_READOBJ_DT_FLAG_ENT(RHF, GUARANTEE_START_INIT),
LLVM_READOBJ_DT_FLAG_ENT(RHF, PIXIE),
LLVM_READOBJ_DT_FLAG_ENT(RHF, DEFAULT_DELAY_LOAD),
LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTART),
LLVM_READOBJ_DT_FLAG_ENT(RHF, REQUICKSTARTED),
LLVM_READOBJ_DT_FLAG_ENT(RHF, CORD),
LLVM_READOBJ_DT_FLAG_ENT(RHF, NO_UNRES_UNDEF),
LLVM_READOBJ_DT_FLAG_ENT(RHF, RLD_ORDER_SAFE)
};
#undef LLVM_READOBJ_DT_FLAG_ENT
template <typename T, typename TFlag>
void printFlags(T Value, ArrayRef<EnumEntry<TFlag>> Flags, raw_ostream &OS) {
using FlagEntry = EnumEntry<TFlag>;
using FlagVector = SmallVector<FlagEntry, 10>;
FlagVector SetFlags;
for (const auto &Flag : Flags) {
if (Flag.Value == 0)
continue;
if ((Value & Flag.Value) == Flag.Value)
SetFlags.push_back(Flag);
}
for (const auto &Flag : SetFlags) {
OS << Flag.Name << " ";
}
}
template <class ELFT>
std::string ELFDumper<ELFT>::getDynamicEntry(uint64_t Type,
uint64_t Value) const {
auto FormatHexValue = [](uint64_t V) {
std::string Str;
raw_string_ostream OS(Str);
const char *ConvChar =
(opts::Output == opts::GNU) ? "0x%" PRIx64 : "0x%" PRIX64;
OS << format(ConvChar, V);
return OS.str();
};
auto FormatFlags = [](uint64_t V,
llvm::ArrayRef<llvm::EnumEntry<unsigned int>> Array) {
std::string Str;
raw_string_ostream OS(Str);
printFlags(V, Array, OS);
return OS.str();
};
// Handle custom printing of architecture specific tags
switch (ObjF->getELFFile()->getHeader()->e_machine) {
case EM_AARCH64:
switch (Type) {
case DT_AARCH64_BTI_PLT:
case DT_AARCH64_PAC_PLT:
return std::to_string(Value);
default:
break;
}
break;
case EM_HEXAGON:
switch (Type) {
case DT_HEXAGON_VER:
return std::to_string(Value);
case DT_HEXAGON_SYMSZ:
case DT_HEXAGON_PLT:
return FormatHexValue(Value);
default:
break;
}
break;
case EM_MIPS:
switch (Type) {
case DT_MIPS_RLD_VERSION:
case DT_MIPS_LOCAL_GOTNO:
case DT_MIPS_SYMTABNO:
case DT_MIPS_UNREFEXTNO:
return std::to_string(Value);
case DT_MIPS_TIME_STAMP:
case DT_MIPS_ICHECKSUM:
case DT_MIPS_IVERSION:
case DT_MIPS_BASE_ADDRESS:
case DT_MIPS_MSYM:
case DT_MIPS_CONFLICT:
case DT_MIPS_LIBLIST:
case DT_MIPS_CONFLICTNO:
case DT_MIPS_LIBLISTNO:
case DT_MIPS_GOTSYM:
case DT_MIPS_HIPAGENO:
case DT_MIPS_RLD_MAP:
case DT_MIPS_DELTA_CLASS:
case DT_MIPS_DELTA_CLASS_NO:
case DT_MIPS_DELTA_INSTANCE:
case DT_MIPS_DELTA_RELOC:
case DT_MIPS_DELTA_RELOC_NO:
case DT_MIPS_DELTA_SYM:
case DT_MIPS_DELTA_SYM_NO:
case DT_MIPS_DELTA_CLASSSYM:
case DT_MIPS_DELTA_CLASSSYM_NO:
case DT_MIPS_CXX_FLAGS:
case DT_MIPS_PIXIE_INIT:
case DT_MIPS_SYMBOL_LIB:
case DT_MIPS_LOCALPAGE_GOTIDX:
case DT_MIPS_LOCAL_GOTIDX:
case DT_MIPS_HIDDEN_GOTIDX:
case DT_MIPS_PROTECTED_GOTIDX:
case DT_MIPS_OPTIONS:
case DT_MIPS_INTERFACE:
case DT_MIPS_DYNSTR_ALIGN:
case DT_MIPS_INTERFACE_SIZE:
case DT_MIPS_RLD_TEXT_RESOLVE_ADDR:
case DT_MIPS_PERF_SUFFIX:
case DT_MIPS_COMPACT_SIZE:
case DT_MIPS_GP_VALUE:
case DT_MIPS_AUX_DYNAMIC:
case DT_MIPS_PLTGOT:
case DT_MIPS_RWPLT:
case DT_MIPS_RLD_MAP_REL:
return FormatHexValue(Value);
case DT_MIPS_FLAGS:
return FormatFlags(Value, makeArrayRef(ElfDynamicDTMipsFlags));
default:
break;
}
break;
default:
break;
}
switch (Type) {
case DT_PLTREL:
if (Value == DT_REL)
return "REL";
if (Value == DT_RELA)
return "RELA";
LLVM_FALLTHROUGH;
case DT_PLTGOT:
case DT_HASH:
case DT_STRTAB:
case DT_SYMTAB:
case DT_RELA:
case DT_INIT:
case DT_FINI:
case DT_REL:
case DT_JMPREL:
case DT_INIT_ARRAY:
case DT_FINI_ARRAY:
case DT_PREINIT_ARRAY:
case DT_DEBUG:
case DT_VERDEF:
case DT_VERNEED:
case DT_VERSYM:
case DT_GNU_HASH:
case DT_NULL:
return FormatHexValue(Value);
case DT_RELACOUNT:
case DT_RELCOUNT:
case DT_VERDEFNUM:
case DT_VERNEEDNUM:
return std::to_string(Value);
case DT_PLTRELSZ:
case DT_RELASZ:
case DT_RELAENT:
case DT_STRSZ:
case DT_SYMENT:
case DT_RELSZ:
case DT_RELENT:
case DT_INIT_ARRAYSZ:
case DT_FINI_ARRAYSZ:
case DT_PREINIT_ARRAYSZ:
case DT_ANDROID_RELSZ:
case DT_ANDROID_RELASZ:
return std::to_string(Value) + " (bytes)";
case DT_NEEDED:
case DT_SONAME:
case DT_AUXILIARY:
case DT_USED:
case DT_FILTER:
case DT_RPATH:
case DT_RUNPATH: {
const std::map<uint64_t, const char *> TagNames = {
{DT_NEEDED, "Shared library"}, {DT_SONAME, "Library soname"},
{DT_AUXILIARY, "Auxiliary library"}, {DT_USED, "Not needed object"},
{DT_FILTER, "Filter library"}, {DT_RPATH, "Library rpath"},
{DT_RUNPATH, "Library runpath"},
};
return (Twine(TagNames.at(Type)) + ": [" + getDynamicString(Value) + "]")
.str();
}
case DT_FLAGS:
return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags));
case DT_FLAGS_1:
return FormatFlags(Value, makeArrayRef(ElfDynamicDTFlags1));
default:
return FormatHexValue(Value);
}
}
template <class ELFT>
StringRef ELFDumper<ELFT>::getDynamicString(uint64_t Value) const {
if (DynamicStringTable.empty() && !DynamicStringTable.data()) {
reportUniqueWarning(createError("string table was not found"));
return "<?>";
}
auto WarnAndReturn = [this](const Twine &Msg, uint64_t Offset) {
reportUniqueWarning(createError("string table at offset 0x" +
Twine::utohexstr(Offset) + Msg));
return "<?>";
};
const uint64_t FileSize = ObjF->getELFFile()->getBufSize();
const uint64_t Offset =
(const uint8_t *)DynamicStringTable.data() - ObjF->getELFFile()->base();
if (DynamicStringTable.size() > FileSize - Offset)
return WarnAndReturn(" with size 0x" +
Twine::utohexstr(DynamicStringTable.size()) +
" goes past the end of the file (0x" +
Twine::utohexstr(FileSize) + ")",
Offset);
if (Value >= DynamicStringTable.size())
return WarnAndReturn(
": unable to read the string at 0x" + Twine::utohexstr(Offset + Value) +
": it goes past the end of the table (0x" +
Twine::utohexstr(Offset + DynamicStringTable.size()) + ")",
Offset);
if (DynamicStringTable.back() != '\0')
return WarnAndReturn(": unable to read the string at 0x" +
Twine::utohexstr(Offset + Value) +
": the string table is not null-terminated",
Offset);
return DynamicStringTable.data() + Value;
}
template <class ELFT> void ELFDumper<ELFT>::printUnwindInfo() {
DwarfCFIEH::PrinterContext<ELFT> Ctx(W, ObjF);
Ctx.printUnwindInformation();
}
namespace {
template <> void ELFDumper<ELF32LE>::printUnwindInfo() {
const ELFFile<ELF32LE> *Obj = ObjF->getELFFile();
const unsigned Machine = Obj->getHeader()->e_machine;
if (Machine == EM_ARM) {
ARM::EHABI::PrinterContext<ELF32LE> Ctx(W, Obj, ObjF->getFileName(),
DotSymtabSec);
Ctx.PrintUnwindInformation();
}
DwarfCFIEH::PrinterContext<ELF32LE> Ctx(W, ObjF);
Ctx.printUnwindInformation();
}
} // end anonymous namespace
template <class ELFT> void ELFDumper<ELFT>::printDynamicTable() {
ELFDumperStyle->printDynamic(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printNeededLibraries() {
ListScope D(W, "NeededLibraries");
std::vector<StringRef> Libs;
for (const auto &Entry : dynamic_table())
if (Entry.d_tag == ELF::DT_NEEDED)
Libs.push_back(getDynamicString(Entry.d_un.d_val));
llvm::sort(Libs);
for (StringRef L : Libs)
W.startLine() << L << "\n";
}
template <class ELFT>
static Error checkHashTable(const ELFFile<ELFT> *Obj,
const typename ELFT::Hash *H,
bool *IsHeaderValid = nullptr) {
auto MakeError = [&](uint64_t Off, const Twine &Msg = "") {
return createError("the hash table at offset 0x" + Twine::utohexstr(Off) +
" goes past the end of the file (0x" +
Twine::utohexstr(Obj->getBufSize()) + ")" + Msg);
};
// Each SHT_HASH section starts from two 32-bit fields: nbucket and nchain.
const unsigned HeaderSize = 2 * sizeof(typename ELFT::Word);
const uint64_t SecOffset = (const uint8_t *)H - Obj->base();
if (IsHeaderValid)
*IsHeaderValid = Obj->getBufSize() - SecOffset >= HeaderSize;
if (Obj->getBufSize() - SecOffset < HeaderSize)
return MakeError(SecOffset);
if (Obj->getBufSize() - SecOffset - HeaderSize <
((uint64_t)H->nbucket + H->nchain) * sizeof(typename ELFT::Word))
return MakeError(SecOffset, ", nbucket = " + Twine(H->nbucket) +
", nchain = " + Twine(H->nchain));
return Error::success();
}
template <class ELFT>
static Error checkGNUHashTable(const ELFFile<ELFT> *Obj,
const typename ELFT::GnuHash *GnuHashTable,
bool *IsHeaderValid = nullptr) {
const uint8_t *TableData = reinterpret_cast<const uint8_t *>(GnuHashTable);
assert(TableData >= Obj->base() &&
TableData < Obj->base() + Obj->getBufSize() &&
"GnuHashTable must always point to a location inside the file");
uint64_t TableOffset = TableData - Obj->base();
if (IsHeaderValid)
*IsHeaderValid = TableOffset + /*Header size:*/ 16 < Obj->getBufSize();
if (TableOffset + 16 + (uint64_t)GnuHashTable->nbuckets * 4 +
(uint64_t)GnuHashTable->maskwords * sizeof(typename ELFT::Off) >=
Obj->getBufSize())
return createError("unable to dump the SHT_GNU_HASH "
"section at 0x" +
Twine::utohexstr(TableOffset) +
": it goes past the end of the file");
return Error::success();
}
template <typename ELFT> void ELFDumper<ELFT>::printHashTable() {
DictScope D(W, "HashTable");
if (!HashTable)
return;
bool IsHeaderValid;
Error Err = checkHashTable(ObjF->getELFFile(), HashTable, &IsHeaderValid);
if (IsHeaderValid) {
W.printNumber("Num Buckets", HashTable->nbucket);
W.printNumber("Num Chains", HashTable->nchain);
}
if (Err) {
reportUniqueWarning(std::move(Err));
return;
}
W.printList("Buckets", HashTable->buckets());
W.printList("Chains", HashTable->chains());
}
template <class ELFT>
static Expected<ArrayRef<typename ELFT::Word>>
getGnuHashTableChains(const typename ELFT::SymRange DynSymTable,
const typename ELFT::GnuHash *GnuHashTable) {
size_t NumSyms = DynSymTable.size();
if (!NumSyms)
return createError("unable to dump 'Values' for the SHT_GNU_HASH "
"section: the dynamic symbol table is empty");
if (GnuHashTable->symndx < NumSyms)
return GnuHashTable->values(NumSyms);
// A normal empty GNU hash table section produced by linker might have
// symndx set to the number of dynamic symbols + 1 (for the zero symbol)
// and have dummy null values in the Bloom filter and in the buckets
// vector (or no values at all). It happens because the value of symndx is not
// important for dynamic loaders when the GNU hash table is empty. They just
// skip the whole object during symbol lookup. In such cases, the symndx value
// is irrelevant and we should not report a warning.
ArrayRef<typename ELFT::Word> Buckets = GnuHashTable->buckets();
if (!llvm::all_of(Buckets, [](typename ELFT::Word V) { return V == 0; }))
return createError("the first hashed symbol index (" +
Twine(GnuHashTable->symndx) +
") is larger than the number of dynamic symbols (" +
Twine(NumSyms) + ")");
// There is no way to represent an array of (dynamic symbols count - symndx)
// length.
return ArrayRef<typename ELFT::Word>();
}
template <typename ELFT>
void ELFDumper<ELFT>::printGnuHashTable(const object::ObjectFile *Obj) {
DictScope D(W, "GnuHashTable");
if (!GnuHashTable)
return;
bool IsHeaderValid;
Error Err =
checkGNUHashTable<ELFT>(ObjF->getELFFile(), GnuHashTable, &IsHeaderValid);
if (IsHeaderValid) {
W.printNumber("Num Buckets", GnuHashTable->nbuckets);
W.printNumber("First Hashed Symbol Index", GnuHashTable->symndx);
W.printNumber("Num Mask Words", GnuHashTable->maskwords);
W.printNumber("Shift Count", GnuHashTable->shift2);
}
if (Err) {
reportUniqueWarning(std::move(Err));
return;
}
ArrayRef<typename ELFT::Off> BloomFilter = GnuHashTable->filter();
W.printHexList("Bloom Filter", BloomFilter);
ArrayRef<Elf_Word> Buckets = GnuHashTable->buckets();
W.printList("Buckets", Buckets);
if (!DynSymRegion) {
reportWarning(createError("unable to dump 'Values' for the SHT_GNU_HASH "
"section: no dynamic symbol table found"),
ObjF->getFileName());
return;
}
Expected<ArrayRef<Elf_Word>> Chains =
getGnuHashTableChains<ELFT>(dynamic_symbols(), GnuHashTable);
if (!Chains) {
reportUniqueWarning(Chains.takeError());
return;
}
W.printHexList("Values", *Chains);
}
template <typename ELFT> void ELFDumper<ELFT>::printLoadName() {
W.printString("LoadName", SOName);
}
template <class ELFT> void ELFDumper<ELFT>::printArchSpecificInfo() {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
switch (Obj->getHeader()->e_machine) {
case EM_ARM:
case EM_RISCV:
printAttributes();
break;
case EM_MIPS: {
ELFDumperStyle->printMipsABIFlags(ObjF);
printMipsOptions();
printMipsReginfo();
MipsGOTParser<ELFT> Parser(Obj, ObjF->getFileName(), dynamic_table(),
dynamic_symbols());
if (Parser.hasGot())
ELFDumperStyle->printMipsGOT(Parser);
if (Parser.hasPlt())
ELFDumperStyle->printMipsPLT(Parser);
break;
}
default:
break;
}
}
namespace {
template <class ELFT> void ELFDumper<ELFT>::printAttributes() {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
if (!Obj->isLE()) {
W.startLine() << "Attributes not implemented.\n";
return;
}
const unsigned Machine = Obj->getHeader()->e_machine;
assert((Machine == EM_ARM || Machine == EM_RISCV) &&
"Attributes not implemented.");
DictScope BA(W, "BuildAttributes");
for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) {
if (Sec.sh_type != ELF::SHT_ARM_ATTRIBUTES &&
Sec.sh_type != ELF::SHT_RISCV_ATTRIBUTES)
continue;
ArrayRef<uint8_t> Contents =
unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(&Sec));
if (Contents[0] != ELFAttrs::Format_Version) {
reportWarning(createError(Twine("unrecognised FormatVersion: 0x") +
Twine::utohexstr(Contents[0])),
ObjF->getFileName());
continue;
}
W.printHex("FormatVersion", Contents[0]);
if (Contents.size() == 1)
continue;
// TODO: Delete the redundant FormatVersion check above.
if (Machine == EM_ARM) {
if (Error E = ARMAttributeParser(&W).parse(Contents, support::little))
reportWarning(std::move(E), ObjF->getFileName());
} else if (Machine == EM_RISCV) {
if (Error E = RISCVAttributeParser(&W).parse(Contents, support::little))
reportWarning(std::move(E), ObjF->getFileName());
}
}
}
template <class ELFT> class MipsGOTParser {
public:
TYPEDEF_ELF_TYPES(ELFT)
using Entry = typename ELFO::Elf_Addr;
using Entries = ArrayRef<Entry>;
const bool IsStatic;
const ELFO * const Obj;
MipsGOTParser(const ELFO *Obj, StringRef FileName, Elf_Dyn_Range DynTable,
Elf_Sym_Range DynSyms);
bool hasGot() const { return !GotEntries.empty(); }
bool hasPlt() const { return !PltEntries.empty(); }
uint64_t getGp() const;
const Entry *getGotLazyResolver() const;
const Entry *getGotModulePointer() const;
const Entry *getPltLazyResolver() const;
const Entry *getPltModulePointer() const;
Entries getLocalEntries() const;
Entries getGlobalEntries() const;
Entries getOtherEntries() const;
Entries getPltEntries() const;
uint64_t getGotAddress(const Entry * E) const;
int64_t getGotOffset(const Entry * E) const;
const Elf_Sym *getGotSym(const Entry *E) const;
uint64_t getPltAddress(const Entry * E) const;
const Elf_Sym *getPltSym(const Entry *E) const;
StringRef getPltStrTable() const { return PltStrTable; }
private:
const Elf_Shdr *GotSec;
size_t LocalNum;
size_t GlobalNum;
const Elf_Shdr *PltSec;
const Elf_Shdr *PltRelSec;
const Elf_Shdr *PltSymTable;
StringRef FileName;
Elf_Sym_Range GotDynSyms;
StringRef PltStrTable;
Entries GotEntries;
Entries PltEntries;
};
} // end anonymous namespace
template <class ELFT>
MipsGOTParser<ELFT>::MipsGOTParser(const ELFO *Obj, StringRef FileName,
Elf_Dyn_Range DynTable,
Elf_Sym_Range DynSyms)
: IsStatic(DynTable.empty()), Obj(Obj), GotSec(nullptr), LocalNum(0),
GlobalNum(0), PltSec(nullptr), PltRelSec(nullptr), PltSymTable(nullptr),
FileName(FileName) {
// See "Global Offset Table" in Chapter 5 in the following document
// for detailed GOT description.
// ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf
// Find static GOT secton.
if (IsStatic) {
GotSec = findSectionByName(*Obj, FileName, ".got");
if (!GotSec)
return;
ArrayRef<uint8_t> Content =
unwrapOrError(FileName, Obj->getSectionContents(GotSec));
GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()),
Content.size() / sizeof(Entry));
LocalNum = GotEntries.size();
return;
}
// Lookup dynamic table tags which define GOT/PLT layouts.
Optional<uint64_t> DtPltGot;
Optional<uint64_t> DtLocalGotNum;
Optional<uint64_t> DtGotSym;
Optional<uint64_t> DtMipsPltGot;
Optional<uint64_t> DtJmpRel;
for (const auto &Entry : DynTable) {
switch (Entry.getTag()) {
case ELF::DT_PLTGOT:
DtPltGot = Entry.getVal();
break;
case ELF::DT_MIPS_LOCAL_GOTNO:
DtLocalGotNum = Entry.getVal();
break;
case ELF::DT_MIPS_GOTSYM:
DtGotSym = Entry.getVal();
break;
case ELF::DT_MIPS_PLTGOT:
DtMipsPltGot = Entry.getVal();
break;
case ELF::DT_JMPREL:
DtJmpRel = Entry.getVal();
break;
}
}
// Find dynamic GOT section.
if (DtPltGot || DtLocalGotNum || DtGotSym) {
if (!DtPltGot)
report_fatal_error("Cannot find PLTGOT dynamic table tag.");
if (!DtLocalGotNum)
report_fatal_error("Cannot find MIPS_LOCAL_GOTNO dynamic table tag.");
if (!DtGotSym)
report_fatal_error("Cannot find MIPS_GOTSYM dynamic table tag.");
size_t DynSymTotal = DynSyms.size();
if (*DtGotSym > DynSymTotal)
reportError(
createError("MIPS_GOTSYM exceeds a number of dynamic symbols"),
FileName);
GotSec = findNotEmptySectionByAddress(Obj, FileName, *DtPltGot);
if (!GotSec)
reportError(createError("There is no not empty GOT section at 0x" +
Twine::utohexstr(*DtPltGot)),
FileName);
LocalNum = *DtLocalGotNum;
GlobalNum = DynSymTotal - *DtGotSym;
ArrayRef<uint8_t> Content =
unwrapOrError(FileName, Obj->getSectionContents(GotSec));
GotEntries = Entries(reinterpret_cast<const Entry *>(Content.data()),
Content.size() / sizeof(Entry));
GotDynSyms = DynSyms.drop_front(*DtGotSym);
}
// Find PLT section.
if (DtMipsPltGot || DtJmpRel) {
if (!DtMipsPltGot)
report_fatal_error("Cannot find MIPS_PLTGOT dynamic table tag.");
if (!DtJmpRel)
report_fatal_error("Cannot find JMPREL dynamic table tag.");
PltSec = findNotEmptySectionByAddress(Obj, FileName, * DtMipsPltGot);
if (!PltSec)
report_fatal_error("There is no not empty PLTGOT section at 0x " +
Twine::utohexstr(*DtMipsPltGot));
PltRelSec = findNotEmptySectionByAddress(Obj, FileName, * DtJmpRel);
if (!PltRelSec)
report_fatal_error("There is no not empty RELPLT section at 0x" +
Twine::utohexstr(*DtJmpRel));
ArrayRef<uint8_t> PltContent =
unwrapOrError(FileName, Obj->getSectionContents(PltSec));
PltEntries = Entries(reinterpret_cast<const Entry *>(PltContent.data()),
PltContent.size() / sizeof(Entry));
PltSymTable = unwrapOrError(FileName, Obj->getSection(PltRelSec->sh_link));
PltStrTable =
unwrapOrError(FileName, Obj->getStringTableForSymtab(*PltSymTable));
}
}
template <class ELFT> uint64_t MipsGOTParser<ELFT>::getGp() const {
return GotSec->sh_addr + 0x7ff0;
}
template <class ELFT>
const typename MipsGOTParser<ELFT>::Entry *
MipsGOTParser<ELFT>::getGotLazyResolver() const {
return LocalNum > 0 ? &GotEntries[0] : nullptr;
}
template <class ELFT>
const typename MipsGOTParser<ELFT>::Entry *
MipsGOTParser<ELFT>::getGotModulePointer() const {
if (LocalNum < 2)
return nullptr;
const Entry &E = GotEntries[1];
if ((E >> (sizeof(Entry) * 8 - 1)) == 0)
return nullptr;
return &E;
}
template <class ELFT>
typename MipsGOTParser<ELFT>::Entries
MipsGOTParser<ELFT>::getLocalEntries() const {
size_t Skip = getGotModulePointer() ? 2 : 1;
if (LocalNum - Skip <= 0)
return Entries();
return GotEntries.slice(Skip, LocalNum - Skip);
}
template <class ELFT>
typename MipsGOTParser<ELFT>::Entries
MipsGOTParser<ELFT>::getGlobalEntries() const {
if (GlobalNum == 0)
return Entries();
return GotEntries.slice(LocalNum, GlobalNum);
}
template <class ELFT>
typename MipsGOTParser<ELFT>::Entries
MipsGOTParser<ELFT>::getOtherEntries() const {
size_t OtherNum = GotEntries.size() - LocalNum - GlobalNum;
if (OtherNum == 0)
return Entries();
return GotEntries.slice(LocalNum + GlobalNum, OtherNum);
}
template <class ELFT>
uint64_t MipsGOTParser<ELFT>::getGotAddress(const Entry *E) const {
int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry);
return GotSec->sh_addr + Offset;
}
template <class ELFT>
int64_t MipsGOTParser<ELFT>::getGotOffset(const Entry *E) const {
int64_t Offset = std::distance(GotEntries.data(), E) * sizeof(Entry);
return Offset - 0x7ff0;
}
template <class ELFT>
const typename MipsGOTParser<ELFT>::Elf_Sym *
MipsGOTParser<ELFT>::getGotSym(const Entry *E) const {
int64_t Offset = std::distance(GotEntries.data(), E);
return &GotDynSyms[Offset - LocalNum];
}
template <class ELFT>
const typename MipsGOTParser<ELFT>::Entry *
MipsGOTParser<ELFT>::getPltLazyResolver() const {
return PltEntries.empty() ? nullptr : &PltEntries[0];
}
template <class ELFT>
const typename MipsGOTParser<ELFT>::Entry *
MipsGOTParser<ELFT>::getPltModulePointer() const {
return PltEntries.size() < 2 ? nullptr : &PltEntries[1];
}
template <class ELFT>
typename MipsGOTParser<ELFT>::Entries
MipsGOTParser<ELFT>::getPltEntries() const {
if (PltEntries.size() <= 2)
return Entries();
return PltEntries.slice(2, PltEntries.size() - 2);
}
template <class ELFT>
uint64_t MipsGOTParser<ELFT>::getPltAddress(const Entry *E) const {
int64_t Offset = std::distance(PltEntries.data(), E) * sizeof(Entry);
return PltSec->sh_addr + Offset;
}
template <class ELFT>
const typename MipsGOTParser<ELFT>::Elf_Sym *
MipsGOTParser<ELFT>::getPltSym(const Entry *E) const {
int64_t Offset = std::distance(getPltEntries().data(), E);
if (PltRelSec->sh_type == ELF::SHT_REL) {
Elf_Rel_Range Rels = unwrapOrError(FileName, Obj->rels(PltRelSec));
return unwrapOrError(FileName,
Obj->getRelocationSymbol(&Rels[Offset], PltSymTable));
} else {
Elf_Rela_Range Rels = unwrapOrError(FileName, Obj->relas(PltRelSec));
return unwrapOrError(FileName,
Obj->getRelocationSymbol(&Rels[Offset], PltSymTable));
}
}
static const EnumEntry<unsigned> ElfMipsISAExtType[] = {
{"None", Mips::AFL_EXT_NONE},
{"Broadcom SB-1", Mips::AFL_EXT_SB1},
{"Cavium Networks Octeon", Mips::AFL_EXT_OCTEON},
{"Cavium Networks Octeon2", Mips::AFL_EXT_OCTEON2},
{"Cavium Networks OcteonP", Mips::AFL_EXT_OCTEONP},
{"Cavium Networks Octeon3", Mips::AFL_EXT_OCTEON3},
{"LSI R4010", Mips::AFL_EXT_4010},
{"Loongson 2E", Mips::AFL_EXT_LOONGSON_2E},
{"Loongson 2F", Mips::AFL_EXT_LOONGSON_2F},
{"Loongson 3A", Mips::AFL_EXT_LOONGSON_3A},
{"MIPS R4650", Mips::AFL_EXT_4650},
{"MIPS R5900", Mips::AFL_EXT_5900},
{"MIPS R10000", Mips::AFL_EXT_10000},
{"NEC VR4100", Mips::AFL_EXT_4100},
{"NEC VR4111/VR4181", Mips::AFL_EXT_4111},
{"NEC VR4120", Mips::AFL_EXT_4120},
{"NEC VR5400", Mips::AFL_EXT_5400},
{"NEC VR5500", Mips::AFL_EXT_5500},
{"RMI Xlr", Mips::AFL_EXT_XLR},
{"Toshiba R3900", Mips::AFL_EXT_3900}
};
static const EnumEntry<unsigned> ElfMipsASEFlags[] = {
{"DSP", Mips::AFL_ASE_DSP},
{"DSPR2", Mips::AFL_ASE_DSPR2},
{"Enhanced VA Scheme", Mips::AFL_ASE_EVA},
{"MCU", Mips::AFL_ASE_MCU},
{"MDMX", Mips::AFL_ASE_MDMX},
{"MIPS-3D", Mips::AFL_ASE_MIPS3D},
{"MT", Mips::AFL_ASE_MT},
{"SmartMIPS", Mips::AFL_ASE_SMARTMIPS},
{"VZ", Mips::AFL_ASE_VIRT},
{"MSA", Mips::AFL_ASE_MSA},
{"MIPS16", Mips::AFL_ASE_MIPS16},
{"microMIPS", Mips::AFL_ASE_MICROMIPS},
{"XPA", Mips::AFL_ASE_XPA},
{"CRC", Mips::AFL_ASE_CRC},
{"GINV", Mips::AFL_ASE_GINV},
};
static const EnumEntry<unsigned> ElfMipsFpABIType[] = {
{"Hard or soft float", Mips::Val_GNU_MIPS_ABI_FP_ANY},
{"Hard float (double precision)", Mips::Val_GNU_MIPS_ABI_FP_DOUBLE},
{"Hard float (single precision)", Mips::Val_GNU_MIPS_ABI_FP_SINGLE},
{"Soft float", Mips::Val_GNU_MIPS_ABI_FP_SOFT},
{"Hard float (MIPS32r2 64-bit FPU 12 callee-saved)",
Mips::Val_GNU_MIPS_ABI_FP_OLD_64},
{"Hard float (32-bit CPU, Any FPU)", Mips::Val_GNU_MIPS_ABI_FP_XX},
{"Hard float (32-bit CPU, 64-bit FPU)", Mips::Val_GNU_MIPS_ABI_FP_64},
{"Hard float compat (32-bit CPU, 64-bit FPU)",
Mips::Val_GNU_MIPS_ABI_FP_64A}
};
static const EnumEntry<unsigned> ElfMipsFlags1[] {
{"ODDSPREG", Mips::AFL_FLAGS1_ODDSPREG},
};
static int getMipsRegisterSize(uint8_t Flag) {
switch (Flag) {
case Mips::AFL_REG_NONE:
return 0;
case Mips::AFL_REG_32:
return 32;
case Mips::AFL_REG_64:
return 64;
case Mips::AFL_REG_128:
return 128;
default:
return -1;
}
}
template <class ELFT>
static void printMipsReginfoData(ScopedPrinter &W,
const Elf_Mips_RegInfo<ELFT> &Reginfo) {
W.printHex("GP", Reginfo.ri_gp_value);
W.printHex("General Mask", Reginfo.ri_gprmask);
W.printHex("Co-Proc Mask0", Reginfo.ri_cprmask[0]);
W.printHex("Co-Proc Mask1", Reginfo.ri_cprmask[1]);
W.printHex("Co-Proc Mask2", Reginfo.ri_cprmask[2]);
W.printHex("Co-Proc Mask3", Reginfo.ri_cprmask[3]);
}
template <class ELFT> void ELFDumper<ELFT>::printMipsReginfo() {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
const Elf_Shdr *Shdr = findSectionByName(*Obj, ObjF->getFileName(), ".reginfo");
if (!Shdr) {
W.startLine() << "There is no .reginfo section in the file.\n";
return;
}
ArrayRef<uint8_t> Sec =
unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr));
if (Sec.size() != sizeof(Elf_Mips_RegInfo<ELFT>)) {
W.startLine() << "The .reginfo section has a wrong size.\n";
return;
}
DictScope GS(W, "MIPS RegInfo");
auto *Reginfo = reinterpret_cast<const Elf_Mips_RegInfo<ELFT> *>(Sec.data());
printMipsReginfoData(W, *Reginfo);
}
template <class ELFT> void ELFDumper<ELFT>::printMipsOptions() {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
const Elf_Shdr *Shdr =
findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.options");
if (!Shdr) {
W.startLine() << "There is no .MIPS.options section in the file.\n";
return;
}
DictScope GS(W, "MIPS Options");
ArrayRef<uint8_t> Sec =
unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr));
while (!Sec.empty()) {
if (Sec.size() < sizeof(Elf_Mips_Options<ELFT>)) {
W.startLine() << "The .MIPS.options section has a wrong size.\n";
return;
}
auto *O = reinterpret_cast<const Elf_Mips_Options<ELFT> *>(Sec.data());
DictScope GS(W, getElfMipsOptionsOdkType(O->kind));
switch (O->kind) {
case ODK_REGINFO:
printMipsReginfoData(W, O->getRegInfo());
break;
default:
W.startLine() << "Unsupported MIPS options tag.\n";
break;
}
Sec = Sec.slice(O->size);
}
}
template <class ELFT> void ELFDumper<ELFT>::printStackMap() const {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
const Elf_Shdr *StackMapSection = nullptr;
for (const auto &Sec : unwrapOrError(ObjF->getFileName(), Obj->sections())) {
StringRef Name =
unwrapOrError(ObjF->getFileName(), Obj->getSectionName(&Sec));
if (Name == ".llvm_stackmaps") {
StackMapSection = &Sec;
break;
}
}
if (!StackMapSection)
return;
ArrayRef<uint8_t> StackMapContentsArray = unwrapOrError(
ObjF->getFileName(), Obj->getSectionContents(StackMapSection));
prettyPrintStackMap(
W, StackMapParser<ELFT::TargetEndianness>(StackMapContentsArray));
}
template <class ELFT> void ELFDumper<ELFT>::printGroupSections() {
ELFDumperStyle->printGroupSections(ObjF->getELFFile());
}
template <class ELFT> void ELFDumper<ELFT>::printAddrsig() {
ELFDumperStyle->printAddrsig(ObjF->getELFFile());
}
static inline void printFields(formatted_raw_ostream &OS, StringRef Str1,
StringRef Str2) {
OS.PadToColumn(2u);
OS << Str1;
OS.PadToColumn(37u);
OS << Str2 << "\n";
OS.flush();
}
template <class ELFT>
static std::string getSectionHeadersNumString(const ELFFile<ELFT> *Obj,
StringRef FileName) {
const typename ELFT::Ehdr *ElfHeader = Obj->getHeader();
if (ElfHeader->e_shnum != 0)
return to_string(ElfHeader->e_shnum);
ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections());
if (Arr.empty())
return "0";
return "0 (" + to_string(Arr[0].sh_size) + ")";
}
template <class ELFT>
static std::string getSectionHeaderTableIndexString(const ELFFile<ELFT> *Obj,
StringRef FileName) {
const typename ELFT::Ehdr *ElfHeader = Obj->getHeader();
if (ElfHeader->e_shstrndx != SHN_XINDEX)
return to_string(ElfHeader->e_shstrndx);
ArrayRef<typename ELFT::Shdr> Arr = unwrapOrError(FileName, Obj->sections());
if (Arr.empty())
return "65535 (corrupt: out of range)";
return to_string(ElfHeader->e_shstrndx) + " (" + to_string(Arr[0].sh_link) +
")";
}
template <class ELFT> void GNUStyle<ELFT>::printFileHeaders(const ELFO *Obj) {
const Elf_Ehdr *e = Obj->getHeader();
OS << "ELF Header:\n";
OS << " Magic: ";
std::string Str;
for (int i = 0; i < ELF::EI_NIDENT; i++)
OS << format(" %02x", static_cast<int>(e->e_ident[i]));
OS << "\n";
Str = printEnum(e->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass));
printFields(OS, "Class:", Str);
Str = printEnum(e->e_ident[ELF::EI_DATA], makeArrayRef(ElfDataEncoding));
printFields(OS, "Data:", Str);
OS.PadToColumn(2u);
OS << "Version:";
OS.PadToColumn(37u);
OS << to_hexString(e->e_ident[ELF::EI_VERSION]);
if (e->e_version == ELF::EV_CURRENT)
OS << " (current)";
OS << "\n";
Str = printEnum(e->e_ident[ELF::EI_OSABI], makeArrayRef(ElfOSABI));
printFields(OS, "OS/ABI:", Str);
printFields(OS,
"ABI Version:", std::to_string(e->e_ident[ELF::EI_ABIVERSION]));
Str = printEnum(e->e_type, makeArrayRef(ElfObjectFileType));
printFields(OS, "Type:", Str);
Str = printEnum(e->e_machine, makeArrayRef(ElfMachineType));
printFields(OS, "Machine:", Str);
Str = "0x" + to_hexString(e->e_version);
printFields(OS, "Version:", Str);
Str = "0x" + to_hexString(e->e_entry);
printFields(OS, "Entry point address:", Str);
Str = to_string(e->e_phoff) + " (bytes into file)";
printFields(OS, "Start of program headers:", Str);
Str = to_string(e->e_shoff) + " (bytes into file)";
printFields(OS, "Start of section headers:", Str);
std::string ElfFlags;
if (e->e_machine == EM_MIPS)
ElfFlags =
printFlags(e->e_flags, makeArrayRef(ElfHeaderMipsFlags),
unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI),
unsigned(ELF::EF_MIPS_MACH));
else if (e->e_machine == EM_RISCV)
ElfFlags = printFlags(e->e_flags, makeArrayRef(ElfHeaderRISCVFlags));
Str = "0x" + to_hexString(e->e_flags);
if (!ElfFlags.empty())
Str = Str + ", " + ElfFlags;
printFields(OS, "Flags:", Str);
Str = to_string(e->e_ehsize) + " (bytes)";
printFields(OS, "Size of this header:", Str);
Str = to_string(e->e_phentsize) + " (bytes)";
printFields(OS, "Size of program headers:", Str);
Str = to_string(e->e_phnum);
printFields(OS, "Number of program headers:", Str);
Str = to_string(e->e_shentsize) + " (bytes)";
printFields(OS, "Size of section headers:", Str);
Str = getSectionHeadersNumString(Obj, this->FileName);
printFields(OS, "Number of section headers:", Str);
Str = getSectionHeaderTableIndexString(Obj, this->FileName);
printFields(OS, "Section header string table index:", Str);
}
namespace {
struct GroupMember {
StringRef Name;
uint64_t Index;
};
struct GroupSection {
StringRef Name;
std::string Signature;
uint64_t ShName;
uint64_t Index;
uint32_t Link;
uint32_t Info;
uint32_t Type;
std::vector<GroupMember> Members;
};
template <class ELFT>
std::vector<GroupSection> getGroups(const ELFFile<ELFT> *Obj,
StringRef FileName) {
using Elf_Shdr = typename ELFT::Shdr;
using Elf_Sym = typename ELFT::Sym;
using Elf_Word = typename ELFT::Word;
std::vector<GroupSection> Ret;
uint64_t I = 0;
for (const Elf_Shdr &Sec : unwrapOrError(FileName, Obj->sections())) {
++I;
if (Sec.sh_type != ELF::SHT_GROUP)
continue;
const Elf_Shdr *Symtab =
unwrapOrError(FileName, Obj->getSection(Sec.sh_link));
StringRef StrTable =
unwrapOrError(FileName, Obj->getStringTableForSymtab(*Symtab));
const Elf_Sym *Sym = unwrapOrError(
FileName, Obj->template getEntry<Elf_Sym>(Symtab, Sec.sh_info));
auto Data = unwrapOrError(
FileName, Obj->template getSectionContentsAsArray<Elf_Word>(&Sec));
StringRef Name = unwrapOrError(FileName, Obj->getSectionName(&Sec));
StringRef Signature = StrTable.data() + Sym->st_name;
Ret.push_back({Name,
maybeDemangle(Signature),
Sec.sh_name,
I - 1,
Sec.sh_link,
Sec.sh_info,
Data[0],
{}});
std::vector<GroupMember> &GM = Ret.back().Members;
for (uint32_t Ndx : Data.slice(1)) {
auto Sec = unwrapOrError(FileName, Obj->getSection(Ndx));
const StringRef Name = unwrapOrError(FileName, Obj->getSectionName(Sec));
GM.push_back({Name, Ndx});
}
}
return Ret;
}
DenseMap<uint64_t, const GroupSection *>
mapSectionsToGroups(ArrayRef<GroupSection> Groups) {
DenseMap<uint64_t, const GroupSection *> Ret;
for (const GroupSection &G : Groups)
for (const GroupMember &GM : G.Members)
Ret.insert({GM.Index, &G});
return Ret;
}
} // namespace
template <class ELFT> void GNUStyle<ELFT>::printGroupSections(const ELFO *Obj) {
std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName);
DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V);
for (const GroupSection &G : V) {
OS << "\n"
<< getGroupType(G.Type) << " group section ["
<< format_decimal(G.Index, 5) << "] `" << G.Name << "' [" << G.Signature
<< "] contains " << G.Members.size() << " sections:\n"
<< " [Index] Name\n";
for (const GroupMember &GM : G.Members) {
const GroupSection *MainGroup = Map[GM.Index];
if (MainGroup != &G) {
OS.flush();
errs() << "Error: section [" << format_decimal(GM.Index, 5)
<< "] in group section [" << format_decimal(G.Index, 5)
<< "] already in group section ["
<< format_decimal(MainGroup->Index, 5) << "]";
errs().flush();
continue;
}
OS << " [" << format_decimal(GM.Index, 5) << "] " << GM.Name << "\n";
}
}
if (V.empty())
OS << "There are no section groups in this file.\n";
}
template <class ELFT>
void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex,
const Elf_Shdr *SymTab, const Elf_Rela &R,
unsigned RelIndex, bool IsRela) {
Expected<std::pair<const typename ELFT::Sym *, std::string>> Target =
this->dumper()->getRelocationTarget(SymTab, R);
if (!Target)
this->reportUniqueWarning(createError(
"unable to print relocation " + Twine(RelIndex) + " in section " +
Twine(SecIndex) + ": " + toString(Target.takeError())));
else
printRelocation(Obj, /*Sym=*/Target->first, /*Name=*/Target->second, R,
IsRela);
}
template <class ELFT>
void GNUStyle<ELFT>::printRelocation(const ELFO *Obj, const Elf_Sym *Sym,
StringRef SymbolName, const Elf_Rela &R,
bool IsRela) {
// First two fields are bit width dependent. The rest of them are fixed width.
unsigned Bias = ELFT::Is64Bits ? 8 : 0;
Field Fields[5] = {0, 10 + Bias, 19 + 2 * Bias, 42 + 2 * Bias, 53 + 2 * Bias};
unsigned Width = ELFT::Is64Bits ? 16 : 8;
Fields[0].Str = to_string(format_hex_no_prefix(R.r_offset, Width));
Fields[1].Str = to_string(format_hex_no_prefix(R.r_info, Width));
SmallString<32> RelocName;
Obj->getRelocationTypeName(R.getType(Obj->isMips64EL()), RelocName);
Fields[2].Str = RelocName.c_str();
if (Sym)
Fields[3].Str = to_string(format_hex_no_prefix(Sym->getValue(), Width));
Fields[4].Str = std::string(SymbolName);
for (const Field &F : Fields)
printField(F);
std::string Addend;
if (IsRela) {
int64_t RelAddend = R.r_addend;
if (!SymbolName.empty()) {
if (R.r_addend < 0) {
Addend = " - ";
RelAddend = std::abs(RelAddend);
} else
Addend = " + ";
}
Addend += to_hexString(RelAddend, false);
}
OS << Addend << "\n";
}
template <class ELFT> void GNUStyle<ELFT>::printRelocHeader(unsigned SType) {
bool IsRela = SType == ELF::SHT_RELA || SType == ELF::SHT_ANDROID_RELA;
bool IsRelr = SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR;
if (ELFT::Is64Bits)
OS << " ";
else
OS << " ";
if (IsRelr && opts::RawRelr)
OS << "Data ";
else
OS << "Offset";
if (ELFT::Is64Bits)
OS << " Info Type"
<< " Symbol's Value Symbol's Name";
else
OS << " Info Type Sym. Value Symbol's Name";
if (IsRela)
OS << " + Addend";
OS << "\n";
}
template <class ELFT> void GNUStyle<ELFT>::printRelocations(const ELFO *Obj) {
bool HasRelocSections = false;
for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) {
if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA &&
Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL &&
Sec.sh_type != ELF::SHT_ANDROID_RELA &&
Sec.sh_type != ELF::SHT_ANDROID_RELR)
continue;
HasRelocSections = true;
StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec));
unsigned Entries = Sec.getEntityCount();
std::vector<Elf_Rela> AndroidRelas;
if (Sec.sh_type == ELF::SHT_ANDROID_REL ||
Sec.sh_type == ELF::SHT_ANDROID_RELA) {
// Android's packed relocation section needs to be unpacked first
// to get the actual number of entries.
AndroidRelas = unwrapOrError(this->FileName, Obj->android_relas(&Sec));
Entries = AndroidRelas.size();
}
std::vector<Elf_Rela> RelrRelas;
if (!opts::RawRelr && (Sec.sh_type == ELF::SHT_RELR ||
Sec.sh_type == ELF::SHT_ANDROID_RELR)) {
// .relr.dyn relative relocation section needs to be unpacked first
// to get the actual number of entries.
Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(&Sec));
RelrRelas = unwrapOrError(this->FileName, Obj->decode_relrs(Relrs));
Entries = RelrRelas.size();
}
uintX_t Offset = Sec.sh_offset;
OS << "\nRelocation section '" << Name << "' at offset 0x"
<< to_hexString(Offset, false) << " contains " << Entries
<< " entries:\n";
printRelocHeader(Sec.sh_type);
const Elf_Shdr *SymTab =
unwrapOrError(this->FileName, Obj->getSection(Sec.sh_link));
unsigned SecNdx = &Sec - &cantFail(Obj->sections()).front();
unsigned RelNdx = 0;
switch (Sec.sh_type) {
case ELF::SHT_REL:
for (const auto &R : unwrapOrError(this->FileName, Obj->rels(&Sec))) {
Elf_Rela Rela;
Rela.r_offset = R.r_offset;
Rela.r_info = R.r_info;
Rela.r_addend = 0;
printRelocation(Obj, SecNdx, SymTab, Rela, ++RelNdx, false);
}
break;
case ELF::SHT_RELA:
for (const auto &R : unwrapOrError(this->FileName, Obj->relas(&Sec)))
printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, true);
break;
case ELF::SHT_RELR:
case ELF::SHT_ANDROID_RELR:
if (opts::RawRelr)
for (const auto &R : unwrapOrError(this->FileName, Obj->relrs(&Sec)))
OS << to_string(format_hex_no_prefix(R, ELFT::Is64Bits ? 16 : 8))
<< "\n";
else
for (const auto &R : RelrRelas)
printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx, false);
break;
case ELF::SHT_ANDROID_REL:
case ELF::SHT_ANDROID_RELA:
for (const auto &R : AndroidRelas)
printRelocation(Obj, SecNdx, SymTab, R, ++RelNdx,
Sec.sh_type == ELF::SHT_ANDROID_RELA);
break;
}
}
if (!HasRelocSections)
OS << "\nThere are no relocations in this file.\n";
}
// Print the offset of a particular section from anyone of the ranges:
// [SHT_LOOS, SHT_HIOS], [SHT_LOPROC, SHT_HIPROC], [SHT_LOUSER, SHT_HIUSER].
// If 'Type' does not fall within any of those ranges, then a string is
// returned as '<unknown>' followed by the type value.
static std::string getSectionTypeOffsetString(unsigned Type) {
if (Type >= SHT_LOOS && Type <= SHT_HIOS)
return "LOOS+0x" + to_hexString(Type - SHT_LOOS);
else if (Type >= SHT_LOPROC && Type <= SHT_HIPROC)
return "LOPROC+0x" + to_hexString(Type - SHT_LOPROC);
else if (Type >= SHT_LOUSER && Type <= SHT_HIUSER)
return "LOUSER+0x" + to_hexString(Type - SHT_LOUSER);
return "0x" + to_hexString(Type) + ": <unknown>";
}
static std::string getSectionTypeString(unsigned Arch, unsigned Type) {
using namespace ELF;
switch (Arch) {
case EM_ARM:
switch (Type) {
case SHT_ARM_EXIDX:
return "ARM_EXIDX";
case SHT_ARM_PREEMPTMAP:
return "ARM_PREEMPTMAP";
case SHT_ARM_ATTRIBUTES:
return "ARM_ATTRIBUTES";
case SHT_ARM_DEBUGOVERLAY:
return "ARM_DEBUGOVERLAY";
case SHT_ARM_OVERLAYSECTION:
return "ARM_OVERLAYSECTION";
}
break;
case EM_X86_64:
switch (Type) {
case SHT_X86_64_UNWIND:
return "X86_64_UNWIND";
}
break;
case EM_MIPS:
case EM_MIPS_RS3_LE:
switch (Type) {
case SHT_MIPS_REGINFO:
return "MIPS_REGINFO";
case SHT_MIPS_OPTIONS:
return "MIPS_OPTIONS";
case SHT_MIPS_DWARF:
return "MIPS_DWARF";
case SHT_MIPS_ABIFLAGS:
return "MIPS_ABIFLAGS";
}
break;
case EM_RISCV:
switch (Type) {
case SHT_RISCV_ATTRIBUTES:
return "RISCV_ATTRIBUTES";
}
}
switch (Type) {
case SHT_NULL:
return "NULL";
case SHT_PROGBITS:
return "PROGBITS";
case SHT_SYMTAB:
return "SYMTAB";
case SHT_STRTAB:
return "STRTAB";
case SHT_RELA:
return "RELA";
case SHT_HASH:
return "HASH";
case SHT_DYNAMIC:
return "DYNAMIC";
case SHT_NOTE:
return "NOTE";
case SHT_NOBITS:
return "NOBITS";
case SHT_REL:
return "REL";
case SHT_SHLIB:
return "SHLIB";
case SHT_DYNSYM:
return "DYNSYM";
case SHT_INIT_ARRAY:
return "INIT_ARRAY";
case SHT_FINI_ARRAY:
return "FINI_ARRAY";
case SHT_PREINIT_ARRAY:
return "PREINIT_ARRAY";
case SHT_GROUP:
return "GROUP";
case SHT_SYMTAB_SHNDX:
return "SYMTAB SECTION INDICES";
case SHT_ANDROID_REL:
return "ANDROID_REL";
case SHT_ANDROID_RELA:
return "ANDROID_RELA";
case SHT_RELR:
case SHT_ANDROID_RELR:
return "RELR";
case SHT_LLVM_ODRTAB:
return "LLVM_ODRTAB";
case SHT_LLVM_LINKER_OPTIONS:
return "LLVM_LINKER_OPTIONS";
case SHT_LLVM_CALL_GRAPH_PROFILE:
return "LLVM_CALL_GRAPH_PROFILE";
case SHT_LLVM_ADDRSIG:
return "LLVM_ADDRSIG";
case SHT_LLVM_DEPENDENT_LIBRARIES:
return "LLVM_DEPENDENT_LIBRARIES";
case SHT_LLVM_SYMPART:
return "LLVM_SYMPART";
case SHT_LLVM_PART_EHDR:
return "LLVM_PART_EHDR";
case SHT_LLVM_PART_PHDR:
return "LLVM_PART_PHDR";
// FIXME: Parse processor specific GNU attributes
case SHT_GNU_ATTRIBUTES:
return "ATTRIBUTES";
case SHT_GNU_HASH:
return "GNU_HASH";
case SHT_GNU_verdef:
return "VERDEF";
case SHT_GNU_verneed:
return "VERNEED";
case SHT_GNU_versym:
return "VERSYM";
default:
return getSectionTypeOffsetString(Type);
}
return "";
}
static void printSectionDescription(formatted_raw_ostream &OS,
unsigned EMachine) {
OS << "Key to Flags:\n";
OS << " W (write), A (alloc), X (execute), M (merge), S (strings), I "
"(info),\n";
OS << " L (link order), O (extra OS processing required), G (group), T "
"(TLS),\n";
OS << " C (compressed), x (unknown), o (OS specific), E (exclude),\n";
if (EMachine == EM_X86_64)
OS << " l (large), ";
else if (EMachine == EM_ARM)
OS << " y (purecode), ";
else
OS << " ";
OS << "p (processor specific)\n";
}
template <class ELFT>
void GNUStyle<ELFT>::printSectionHeaders(const ELFO *Obj) {
unsigned Bias = ELFT::Is64Bits ? 0 : 8;
ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections());
OS << "There are " << to_string(Sections.size())
<< " section headers, starting at offset "
<< "0x" << to_hexString(Obj->getHeader()->e_shoff, false) << ":\n\n";
OS << "Section Headers:\n";
Field Fields[11] = {
{"[Nr]", 2}, {"Name", 7}, {"Type", 25},
{"Address", 41}, {"Off", 58 - Bias}, {"Size", 65 - Bias},
{"ES", 72 - Bias}, {"Flg", 75 - Bias}, {"Lk", 79 - Bias},
{"Inf", 82 - Bias}, {"Al", 86 - Bias}};
for (auto &F : Fields)
printField(F);
OS << "\n";
const ELFObjectFile<ELFT> *ElfObj = this->dumper()->getElfObject();
StringRef SecStrTable = unwrapOrError<StringRef>(
ElfObj->getFileName(),
Obj->getSectionStringTable(Sections, this->dumper()->WarningHandler));
size_t SectionIndex = 0;
for (const Elf_Shdr &Sec : Sections) {
Fields[0].Str = to_string(SectionIndex);
if (SecStrTable.empty())
Fields[1].Str = "<no-strings>";
else
Fields[1].Str = std::string(unwrapOrError<StringRef>(
ElfObj->getFileName(), Obj->getSectionName(&Sec, SecStrTable)));
Fields[2].Str =
getSectionTypeString(Obj->getHeader()->e_machine, Sec.sh_type);
Fields[3].Str =
to_string(format_hex_no_prefix(Sec.sh_addr, ELFT::Is64Bits ? 16 : 8));
Fields[4].Str = to_string(format_hex_no_prefix(Sec.sh_offset, 6));
Fields[5].Str = to_string(format_hex_no_prefix(Sec.sh_size, 6));
Fields[6].Str = to_string(format_hex_no_prefix(Sec.sh_entsize, 2));
Fields[7].Str = getGNUFlags(Obj->getHeader()->e_machine, Sec.sh_flags);
Fields[8].Str = to_string(Sec.sh_link);
Fields[9].Str = to_string(Sec.sh_info);
Fields[10].Str = to_string(Sec.sh_addralign);
OS.PadToColumn(Fields[0].Column);
OS << "[" << right_justify(Fields[0].Str, 2) << "]";
for (int i = 1; i < 7; i++)
printField(Fields[i]);
OS.PadToColumn(Fields[7].Column);
OS << right_justify(Fields[7].Str, 3);
OS.PadToColumn(Fields[8].Column);
OS << right_justify(Fields[8].Str, 2);
OS.PadToColumn(Fields[9].Column);
OS << right_justify(Fields[9].Str, 3);
OS.PadToColumn(Fields[10].Column);
OS << right_justify(Fields[10].Str, 2);
OS << "\n";
++SectionIndex;
}
printSectionDescription(OS, Obj->getHeader()->e_machine);
}
template <class ELFT>
void GNUStyle<ELFT>::printSymtabMessage(const ELFO *Obj, StringRef Name,
size_t Entries,
bool NonVisibilityBitsUsed) {
if (!Name.empty())
OS << "\nSymbol table '" << Name << "'";
else
OS << "\nSymbol table for image";
OS << " contains " << Entries << " entries:\n";
if (ELFT::Is64Bits)
OS << " Num: Value Size Type Bind Vis";
else
OS << " Num: Value Size Type Bind Vis";
if (NonVisibilityBitsUsed)
OS << " ";
OS << " Ndx Name\n";
}
template <class ELFT>
std::string GNUStyle<ELFT>::getSymbolSectionNdx(const ELFO *Obj,
const Elf_Sym *Symbol,
const Elf_Sym *FirstSym) {
unsigned SectionIndex = Symbol->st_shndx;
switch (SectionIndex) {
case ELF::SHN_UNDEF:
return "UND";
case ELF::SHN_ABS:
return "ABS";
case ELF::SHN_COMMON:
return "COM";
case ELF::SHN_XINDEX: {
Expected<uint32_t> IndexOrErr = object::getExtendedSymbolTableIndex<ELFT>(
Symbol, FirstSym, this->dumper()->getShndxTable());
if (!IndexOrErr) {
assert(Symbol->st_shndx == SHN_XINDEX &&
"getSymbolSectionIndex should only fail due to an invalid "
"SHT_SYMTAB_SHNDX table/reference");
this->reportUniqueWarning(IndexOrErr.takeError());
return "RSV[0xffff]";
}
return to_string(format_decimal(*IndexOrErr, 3));
}
default:
// Find if:
// Processor specific
if (SectionIndex >= ELF::SHN_LOPROC && SectionIndex <= ELF::SHN_HIPROC)
return std::string("PRC[0x") +
to_string(format_hex_no_prefix(SectionIndex, 4)) + "]";
// OS specific
if (SectionIndex >= ELF::SHN_LOOS && SectionIndex <= ELF::SHN_HIOS)
return std::string("OS[0x") +
to_string(format_hex_no_prefix(SectionIndex, 4)) + "]";
// Architecture reserved:
if (SectionIndex >= ELF::SHN_LORESERVE &&
SectionIndex <= ELF::SHN_HIRESERVE)
return std::string("RSV[0x") +
to_string(format_hex_no_prefix(SectionIndex, 4)) + "]";
// A normal section with an index
return to_string(format_decimal(SectionIndex, 3));
}
}
template <class ELFT>
void GNUStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol,
const Elf_Sym *FirstSym, StringRef StrTable,
bool IsDynamic, bool NonVisibilityBitsUsed) {
static int Idx = 0;
static bool Dynamic = true;
// If this function was called with a different value from IsDynamic
// from last call, happens when we move from dynamic to static symbol
// table, "Num" field should be reset.
if (!Dynamic != !IsDynamic) {
Idx = 0;
Dynamic = false;
}
unsigned Bias = ELFT::Is64Bits ? 8 : 0;
Field Fields[8] = {0, 8, 17 + Bias, 23 + Bias,
31 + Bias, 38 + Bias, 48 + Bias, 51 + Bias};
Fields[0].Str = to_string(format_decimal(Idx++, 6)) + ":";
Fields[1].Str = to_string(
format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8));
Fields[2].Str = to_string(format_decimal(Symbol->st_size, 5));
unsigned char SymbolType = Symbol->getType();
if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU &&
SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS)
Fields[3].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes));
else
Fields[3].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes));
Fields[4].Str =
printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings));
Fields[5].Str =
printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities));
if (Symbol->st_other & ~0x3)
Fields[5].Str +=
" [<other: " + to_string(format_hex(Symbol->st_other, 2)) + ">]";
Fields[6].Column += NonVisibilityBitsUsed ? 13 : 0;
Fields[6].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym);
Fields[7].Str =
this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic);
for (auto &Entry : Fields)
printField(Entry);
OS << "\n";
}
template <class ELFT>
void GNUStyle<ELFT>::printHashedSymbol(const ELFO *Obj, const Elf_Sym *FirstSym,
uint32_t Sym, StringRef StrTable,
uint32_t Bucket) {
unsigned Bias = ELFT::Is64Bits ? 8 : 0;
Field Fields[9] = {0, 6, 11, 20 + Bias, 25 + Bias,
34 + Bias, 41 + Bias, 49 + Bias, 53 + Bias};
Fields[0].Str = to_string(format_decimal(Sym, 5));
Fields[1].Str = to_string(format_decimal(Bucket, 3)) + ":";
const auto Symbol = FirstSym + Sym;
Fields[2].Str = to_string(
format_hex_no_prefix(Symbol->st_value, ELFT::Is64Bits ? 16 : 8));
Fields[3].Str = to_string(format_decimal(Symbol->st_size, 5));
unsigned char SymbolType = Symbol->getType();
if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU &&
SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS)
Fields[4].Str = printEnum(SymbolType, makeArrayRef(AMDGPUSymbolTypes));
else
Fields[4].Str = printEnum(SymbolType, makeArrayRef(ElfSymbolTypes));
Fields[5].Str =
printEnum(Symbol->getBinding(), makeArrayRef(ElfSymbolBindings));
Fields[6].Str =
printEnum(Symbol->getVisibility(), makeArrayRef(ElfSymbolVisibilities));
Fields[7].Str = getSymbolSectionNdx(Obj, Symbol, FirstSym);
Fields[8].Str = this->dumper()->getFullSymbolName(Symbol, StrTable, true);
for (auto &Entry : Fields)
printField(Entry);
OS << "\n";
}
template <class ELFT>
void GNUStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols,
bool PrintDynamicSymbols) {
if (!PrintSymbols && !PrintDynamicSymbols)
return;
// GNU readelf prints both the .dynsym and .symtab with --symbols.
this->dumper()->printSymbolsHelper(true);
if (PrintSymbols)
this->dumper()->printSymbolsHelper(false);
}
template <class ELFT> void GNUStyle<ELFT>::printHashSymbols(const ELFO *Obj) {
if (this->dumper()->getDynamicStringTable().empty())
return;
auto StringTable = this->dumper()->getDynamicStringTable();
auto DynSyms = this->dumper()->dynamic_symbols();
auto PrintHashTable = [&](const Elf_Hash *SysVHash) {
if (ELFT::Is64Bits)
OS << " Num Buc: Value Size Type Bind Vis Ndx Name";
else
OS << " Num Buc: Value Size Type Bind Vis Ndx Name";
OS << "\n";
auto Buckets = SysVHash->buckets();
auto Chains = SysVHash->chains();
for (uint32_t Buc = 0; Buc < SysVHash->nbucket; Buc++) {
if (Buckets[Buc] == ELF::STN_UNDEF)
continue;
std::vector<bool> Visited(SysVHash->nchain);
for (uint32_t Ch = Buckets[Buc]; Ch < SysVHash->nchain; Ch = Chains[Ch]) {
if (Ch == ELF::STN_UNDEF)
break;
if (Visited[Ch]) {
reportWarning(
createError(".hash section is invalid: bucket " + Twine(Ch) +
": a cycle was detected in the linked chain"),
this->FileName);
break;
}
printHashedSymbol(Obj, &DynSyms[0], Ch, StringTable, Buc);
Visited[Ch] = true;
}
}
};
if (const Elf_Hash *SysVHash = this->dumper()->getHashTable()) {
OS << "\n Symbol table of .hash for image:\n";
if (Error E = checkHashTable<ELFT>(Obj, SysVHash))
this->reportUniqueWarning(std::move(E));
else
PrintHashTable(SysVHash);
}
// Try printing .gnu.hash
if (auto GnuHash = this->dumper()->getGnuHashTable()) {
OS << "\n Symbol table of .gnu.hash for image:\n";
if (ELFT::Is64Bits)
OS << " Num Buc: Value Size Type Bind Vis Ndx Name";
else
OS << " Num Buc: Value Size Type Bind Vis Ndx Name";
OS << "\n";
auto Buckets = GnuHash->buckets();
for (uint32_t Buc = 0; Buc < GnuHash->nbuckets; Buc++) {
if (Buckets[Buc] == ELF::STN_UNDEF)
continue;
uint32_t Index = Buckets[Buc];
uint32_t GnuHashable = Index - GnuHash->symndx;
// Print whole chain
while (true) {
printHashedSymbol(Obj, &DynSyms[0], Index++, StringTable, Buc);
// Chain ends at symbol with stopper bit
if ((GnuHash->values(DynSyms.size())[GnuHashable++] & 1) == 1)
break;
}
}
}
}
static inline std::string printPhdrFlags(unsigned Flag) {
std::string Str;
Str = (Flag & PF_R) ? "R" : " ";
Str += (Flag & PF_W) ? "W" : " ";
Str += (Flag & PF_X) ? "E" : " ";
return Str;
}
template <class ELFT>
static bool checkTLSSections(const typename ELFT::Phdr &Phdr,
const typename ELFT::Shdr &Sec) {
if (Sec.sh_flags & ELF::SHF_TLS) {
// .tbss must only be shown in the PT_TLS segment.
if (Sec.sh_type == ELF::SHT_NOBITS)
return Phdr.p_type == ELF::PT_TLS;
// SHF_TLS sections are only shown in PT_TLS, PT_LOAD or PT_GNU_RELRO
// segments.
return (Phdr.p_type == ELF::PT_TLS) || (Phdr.p_type == ELF::PT_LOAD) ||
(Phdr.p_type == ELF::PT_GNU_RELRO);
}
// PT_TLS must only have SHF_TLS sections.
return Phdr.p_type != ELF::PT_TLS;
}
template <class ELFT>
static bool checkOffsets(const typename ELFT::Phdr &Phdr,
const typename ELFT::Shdr &Sec) {
// SHT_NOBITS sections don't need to have an offset inside the segment.
if (Sec.sh_type == ELF::SHT_NOBITS)
return true;
if (Sec.sh_offset < Phdr.p_offset)
return false;
// Only non-empty sections can be at the end of a segment.
if (Sec.sh_size == 0)
return (Sec.sh_offset + 1 <= Phdr.p_offset + Phdr.p_filesz);
return Sec.sh_offset + Sec.sh_size <= Phdr.p_offset + Phdr.p_filesz;
}
// Check that an allocatable section belongs to a virtual address
// space of a segment.
template <class ELFT>
static bool checkVMA(const typename ELFT::Phdr &Phdr,
const typename ELFT::Shdr &Sec) {
if (!(Sec.sh_flags & ELF::SHF_ALLOC))
return true;
if (Sec.sh_addr < Phdr.p_vaddr)
return false;
bool IsTbss =
(Sec.sh_type == ELF::SHT_NOBITS) && ((Sec.sh_flags & ELF::SHF_TLS) != 0);
// .tbss is special, it only has memory in PT_TLS and has NOBITS properties.
bool IsTbssInNonTLS = IsTbss && Phdr.p_type != ELF::PT_TLS;
// Only non-empty sections can be at the end of a segment.
if (Sec.sh_size == 0 || IsTbssInNonTLS)
return Sec.sh_addr + 1 <= Phdr.p_vaddr + Phdr.p_memsz;
return Sec.sh_addr + Sec.sh_size <= Phdr.p_vaddr + Phdr.p_memsz;
}
template <class ELFT>
static bool checkPTDynamic(const typename ELFT::Phdr &Phdr,
const typename ELFT::Shdr &Sec) {
if (Phdr.p_type != ELF::PT_DYNAMIC || Phdr.p_memsz == 0 || Sec.sh_size != 0)
return true;
// We get here when we have an empty section. Only non-empty sections can be
// at the start or at the end of PT_DYNAMIC.
// Is section within the phdr both based on offset and VMA?
bool CheckOffset = (Sec.sh_type == ELF::SHT_NOBITS) ||
(Sec.sh_offset > Phdr.p_offset &&
Sec.sh_offset < Phdr.p_offset + Phdr.p_filesz);
bool CheckVA = !(Sec.sh_flags & ELF::SHF_ALLOC) ||
(Sec.sh_addr > Phdr.p_vaddr && Sec.sh_addr < Phdr.p_memsz);
return CheckOffset && CheckVA;
}
template <class ELFT>
void GNUStyle<ELFT>::printProgramHeaders(
const ELFO *Obj, bool PrintProgramHeaders,
cl::boolOrDefault PrintSectionMapping) {
if (PrintProgramHeaders)
printProgramHeaders(Obj);
// Display the section mapping along with the program headers, unless
// -section-mapping is explicitly set to false.
if (PrintSectionMapping != cl::BOU_FALSE)
printSectionMapping(Obj);
}
template <class ELFT>
void GNUStyle<ELFT>::printProgramHeaders(const ELFO *Obj) {
unsigned Bias = ELFT::Is64Bits ? 8 : 0;
const Elf_Ehdr *Header = Obj->getHeader();
Field Fields[8] = {2, 17, 26, 37 + Bias,
48 + Bias, 56 + Bias, 64 + Bias, 68 + Bias};
OS << "\nElf file type is "
<< printEnum(Header->e_type, makeArrayRef(ElfObjectFileType)) << "\n"
<< "Entry point " << format_hex(Header->e_entry, 3) << "\n"
<< "There are " << Header->e_phnum << " program headers,"
<< " starting at offset " << Header->e_phoff << "\n\n"
<< "Program Headers:\n";
if (ELFT::Is64Bits)
OS << " Type Offset VirtAddr PhysAddr "
<< " FileSiz MemSiz Flg Align\n";
else
OS << " Type Offset VirtAddr PhysAddr FileSiz "
<< "MemSiz Flg Align\n";
unsigned Width = ELFT::Is64Bits ? 18 : 10;
unsigned SizeWidth = ELFT::Is64Bits ? 8 : 7;
for (const auto &Phdr :
unwrapOrError(this->FileName, Obj->program_headers())) {
Fields[0].Str = getElfPtType(Header->e_machine, Phdr.p_type);
Fields[1].Str = to_string(format_hex(Phdr.p_offset, 8));
Fields[2].Str = to_string(format_hex(Phdr.p_vaddr, Width));
Fields[3].Str = to_string(format_hex(Phdr.p_paddr, Width));
Fields[4].Str = to_string(format_hex(Phdr.p_filesz, SizeWidth));
Fields[5].Str = to_string(format_hex(Phdr.p_memsz, SizeWidth));
Fields[6].Str = printPhdrFlags(Phdr.p_flags);
Fields[7].Str = to_string(format_hex(Phdr.p_align, 1));
for (auto Field : Fields)
printField(Field);
if (Phdr.p_type == ELF::PT_INTERP) {
OS << "\n";
auto ReportBadInterp = [&](const Twine &Msg) {
reportWarning(
createError("unable to read program interpreter name at offset 0x" +
Twine::utohexstr(Phdr.p_offset) + ": " + Msg),
this->FileName);
};
if (Phdr.p_offset >= Obj->getBufSize()) {
ReportBadInterp("it goes past the end of the file (0x" +
Twine::utohexstr(Obj->getBufSize()) + ")");
continue;
}
const char *Data =
reinterpret_cast<const char *>(Obj->base()) + Phdr.p_offset;
size_t MaxSize = Obj->getBufSize() - Phdr.p_offset;
size_t Len = strnlen(Data, MaxSize);
if (Len == MaxSize) {
ReportBadInterp("it is not null-terminated");
continue;
}
OS << " [Requesting program interpreter: ";
OS << StringRef(Data, Len) << "]";
}
OS << "\n";
}
}
template <class ELFT>
void GNUStyle<ELFT>::printSectionMapping(const ELFO *Obj) {
OS << "\n Section to Segment mapping:\n Segment Sections...\n";
DenseSet<const Elf_Shdr *> BelongsToSegment;
int Phnum = 0;
for (const Elf_Phdr &Phdr :
unwrapOrError(this->FileName, Obj->program_headers())) {
std::string Sections;
OS << format(" %2.2d ", Phnum++);
// Check if each section is in a segment and then print mapping.
for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) {
if (Sec.sh_type == ELF::SHT_NULL)
continue;
// readelf additionally makes sure it does not print zero sized sections
// at end of segments and for PT_DYNAMIC both start and end of section
// .tbss must only be shown in PT_TLS section.
if (checkTLSSections<ELFT>(Phdr, Sec) && checkOffsets<ELFT>(Phdr, Sec) &&
checkVMA<ELFT>(Phdr, Sec) && checkPTDynamic<ELFT>(Phdr, Sec)) {
Sections +=
unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() +
" ";
BelongsToSegment.insert(&Sec);
}
}
OS << Sections << "\n";
OS.flush();
}
// Display sections that do not belong to a segment.
std::string Sections;
for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) {
if (BelongsToSegment.find(&Sec) == BelongsToSegment.end())
Sections +=
unwrapOrError(this->FileName, Obj->getSectionName(&Sec)).str() + ' ';
}
if (!Sections.empty()) {
OS << " None " << Sections << '\n';
OS.flush();
}
}
namespace {
template <class ELFT> struct RelSymbol {
const typename ELFT::Sym *Sym;
std::string Name;
};
template <class ELFT>
RelSymbol<ELFT> getSymbolForReloc(const ELFFile<ELFT> *Obj, StringRef FileName,
const ELFDumper<ELFT> *Dumper,
const typename ELFT::Rela &Reloc) {
uint32_t SymIndex = Reloc.getSymbol(Obj->isMips64EL());
auto WarnAndReturn = [&](const typename ELFT::Sym *Sym,
const Twine &Reason) -> RelSymbol<ELFT> {
reportWarning(
createError("unable to get name of the dynamic symbol with index " +
Twine(SymIndex) + ": " + Reason),
FileName);
return {Sym, "<corrupt>"};
};
ArrayRef<typename ELFT::Sym> Symbols = Dumper->dynamic_symbols();
const typename ELFT::Sym *FirstSym = Symbols.begin();
if (!FirstSym)
return WarnAndReturn(nullptr, "no dynamic symbol table found");
// We might have an object without a section header. In this case the size of
// Symbols is zero, because there is no way to know the size of the dynamic
// table. We should allow this case and not print a warning.
if (!Symbols.empty() && SymIndex >= Symbols.size())
return WarnAndReturn(
nullptr,
"index is greater than or equal to the number of dynamic symbols (" +
Twine(Symbols.size()) + ")");
const typename ELFT::Sym *Sym = FirstSym + SymIndex;
Expected<StringRef> ErrOrName = Sym->getName(Dumper->getDynamicStringTable());
if (!ErrOrName)
return WarnAndReturn(Sym, toString(ErrOrName.takeError()));
return {Sym == FirstSym ? nullptr : Sym, maybeDemangle(*ErrOrName)};
}
} // namespace
template <class ELFT>
void GNUStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela R,
bool IsRela) {
RelSymbol<ELFT> S = getSymbolForReloc(Obj, this->FileName, this->dumper(), R);
printRelocation(Obj, S.Sym, S.Name, R, IsRela);
}
template <class ELFT>
static size_t getMaxDynamicTagSize(const ELFFile<ELFT> *Obj,
typename ELFT::DynRange Tags) {
size_t Max = 0;
for (const typename ELFT::Dyn &Dyn : Tags)
Max = std::max(Max, Obj->getDynamicTagAsString(Dyn.d_tag).size());
return Max;
}
template <class ELFT> void GNUStyle<ELFT>::printDynamic(const ELFO *Obj) {
Elf_Dyn_Range Table = this->dumper()->dynamic_table();
if (Table.empty())
return;
const DynRegionInfo &DynamicTableRegion =
this->dumper()->getDynamicTableRegion();
OS << "Dynamic section at offset "
<< format_hex(reinterpret_cast<const uint8_t *>(DynamicTableRegion.Addr) -
Obj->base(),
1)
<< " contains " << Table.size() << " entries:\n";
// The type name is surrounded with round brackets, hence add 2.
size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table) + 2;
// The "Name/Value" column should be indented from the "Type" column by N
// spaces, where N = MaxTagSize - length of "Type" (4) + trailing
// space (1) = 3.
OS << " Tag" + std::string(ELFT::Is64Bits ? 16 : 8, ' ') + "Type"
<< std::string(MaxTagSize - 3, ' ') << "Name/Value\n";
std::string ValueFmt = " %-" + std::to_string(MaxTagSize) + "s ";
for (auto Entry : Table) {
uintX_t Tag = Entry.getTag();
std::string Type =
std::string("(") + Obj->getDynamicTagAsString(Tag).c_str() + ")";
std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal());
OS << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10)
<< format(ValueFmt.c_str(), Type.c_str()) << Value << "\n";
}
}
template <class ELFT>
void GNUStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) {
const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion();
const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion();
const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion();
const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion();
if (DynRelaRegion.Size > 0) {
OS << "\n'RELA' relocation section at offset "
<< format_hex(reinterpret_cast<const uint8_t *>(DynRelaRegion.Addr) -
Obj->base(),
1)
<< " contains " << DynRelaRegion.Size << " bytes:\n";
printRelocHeader(ELF::SHT_RELA);
for (const Elf_Rela &Rela : this->dumper()->dyn_relas())
printDynamicRelocation(Obj, Rela, true);
}
if (DynRelRegion.Size > 0) {
OS << "\n'REL' relocation section at offset "
<< format_hex(reinterpret_cast<const uint8_t *>(DynRelRegion.Addr) -
Obj->base(),
1)
<< " contains " << DynRelRegion.Size << " bytes:\n";
printRelocHeader(ELF::SHT_REL);
for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) {
Elf_Rela Rela;
Rela.r_offset = Rel.r_offset;
Rela.r_info = Rel.r_info;
Rela.r_addend = 0;
printDynamicRelocation(Obj, Rela, false);
}
}
if (DynRelrRegion.Size > 0) {
OS << "\n'RELR' relocation section at offset "
<< format_hex(reinterpret_cast<const uint8_t *>(DynRelrRegion.Addr) -
Obj->base(),
1)
<< " contains " << DynRelrRegion.Size << " bytes:\n";
printRelocHeader(ELF::SHT_REL);
Elf_Relr_Range Relrs = this->dumper()->dyn_relrs();
std::vector<Elf_Rela> RelrRelas =
unwrapOrError(this->FileName, Obj->decode_relrs(Relrs));
for (const Elf_Rela &Rela : RelrRelas) {
printDynamicRelocation(Obj, Rela, false);
}
}
if (DynPLTRelRegion.Size) {
OS << "\n'PLT' relocation section at offset "
<< format_hex(reinterpret_cast<const uint8_t *>(DynPLTRelRegion.Addr) -
Obj->base(),
1)
<< " contains " << DynPLTRelRegion.Size << " bytes:\n";
}
if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela)) {
printRelocHeader(ELF::SHT_RELA);
for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>())
printDynamicRelocation(Obj, Rela, true);
} else {
printRelocHeader(ELF::SHT_REL);
for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) {
Elf_Rela Rela;
Rela.r_offset = Rel.r_offset;
Rela.r_info = Rel.r_info;
Rela.r_addend = 0;
printDynamicRelocation(Obj, Rela, false);
}
}
}
template <class ELFT>
void GNUStyle<ELFT>::printGNUVersionSectionProlog(
const ELFFile<ELFT> *Obj, const typename ELFT::Shdr *Sec,
const Twine &Label, unsigned EntriesNum) {
StringRef SecName = unwrapOrError(this->FileName, Obj->getSectionName(Sec));
OS << Label << " section '" << SecName << "' "
<< "contains " << EntriesNum << " entries:\n";
unsigned SecNdx = Sec - &cantFail(Obj->sections()).front();
StringRef SymTabName = "<corrupt>";
Expected<const typename ELFT::Shdr *> SymTabOrErr =
Obj->getSection(Sec->sh_link);
if (SymTabOrErr)
SymTabName =
unwrapOrError(this->FileName, Obj->getSectionName(*SymTabOrErr));
else
this->reportUniqueWarning(
createError("invalid section linked to " +
object::getELFSectionTypeName(Obj->getHeader()->e_machine,
Sec->sh_type) +
" section with index " + Twine(SecNdx) + ": " +
toString(SymTabOrErr.takeError())));
OS << " Addr: " << format_hex_no_prefix(Sec->sh_addr, 16)
<< " Offset: " << format_hex(Sec->sh_offset, 8)
<< " Link: " << Sec->sh_link << " (" << SymTabName << ")\n";
}
template <class ELFT>
void GNUStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) {
if (!Sec)
return;
printGNUVersionSectionProlog(Obj, Sec, "Version symbols",
Sec->sh_size / sizeof(Elf_Versym));
Expected<ArrayRef<Elf_Versym>> VerTableOrErr =
this->dumper()->getVersionTable(Sec, /*SymTab=*/nullptr,
/*StrTab=*/nullptr);
if (!VerTableOrErr) {
this->reportUniqueWarning(VerTableOrErr.takeError());
return;
}
ArrayRef<Elf_Versym> VerTable = *VerTableOrErr;
std::vector<StringRef> Versions;
for (size_t I = 0, E = VerTable.size(); I < E; ++I) {
unsigned Ndx = VerTable[I].vs_index;
if (Ndx == VER_NDX_LOCAL || Ndx == VER_NDX_GLOBAL) {
Versions.emplace_back(Ndx == VER_NDX_LOCAL ? "*local*" : "*global*");
continue;
}
bool IsDefault;
Expected<StringRef> NameOrErr =
this->dumper()->getSymbolVersionByIndex(Ndx, IsDefault);
if (!NameOrErr) {
if (!NameOrErr) {
unsigned SecNdx = Sec - &cantFail(Obj->sections()).front();
this->reportUniqueWarning(createError(
"unable to get a version for entry " + Twine(I) +
" of SHT_GNU_versym section with index " + Twine(SecNdx) + ": " +
toString(NameOrErr.takeError())));
}
Versions.emplace_back("<corrupt>");
continue;
}
Versions.emplace_back(*NameOrErr);
}
// readelf prints 4 entries per line.
uint64_t Entries = VerTable.size();
for (uint64_t VersymRow = 0; VersymRow < Entries; VersymRow += 4) {
OS << " " << format_hex_no_prefix(VersymRow, 3) << ":";
for (uint64_t I = 0; (I < 4) && (I + VersymRow) < Entries; ++I) {
unsigned Ndx = VerTable[VersymRow + I].vs_index;
OS << format("%4x%c", Ndx & VERSYM_VERSION,
Ndx & VERSYM_HIDDEN ? 'h' : ' ');
OS << left_justify("(" + std::string(Versions[VersymRow + I]) + ")", 13);
}
OS << '\n';
}
OS << '\n';
}
static std::string versionFlagToString(unsigned Flags) {
if (Flags == 0)
return "none";
std::string Ret;
auto AddFlag = [&Ret, &Flags](unsigned Flag, StringRef Name) {
if (!(Flags & Flag))
return;
if (!Ret.empty())
Ret += " | ";
Ret += Name;
Flags &= ~Flag;
};
AddFlag(VER_FLG_BASE, "BASE");
AddFlag(VER_FLG_WEAK, "WEAK");
AddFlag(VER_FLG_INFO, "INFO");
AddFlag(~0, "<unknown>");
return Ret;
}
template <class ELFT>
void GNUStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) {
if (!Sec)
return;
printGNUVersionSectionProlog(Obj, Sec, "Version definition", Sec->sh_info);
Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec);
if (!V) {
this->reportUniqueWarning(V.takeError());
return;
}
for (const VerDef &Def : *V) {
OS << format(" 0x%04x: Rev: %u Flags: %s Index: %u Cnt: %u Name: %s\n",
Def.Offset, Def.Version,
versionFlagToString(Def.Flags).c_str(), Def.Ndx, Def.Cnt,
Def.Name.data());
unsigned I = 0;
for (const VerdAux &Aux : Def.AuxV)
OS << format(" 0x%04x: Parent %u: %s\n", Aux.Offset, ++I,
Aux.Name.data());
}
OS << '\n';
}
template <class ELFT>
void GNUStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) {
if (!Sec)
return;
unsigned VerneedNum = Sec->sh_info;
printGNUVersionSectionProlog(Obj, Sec, "Version needs", VerneedNum);
Expected<std::vector<VerNeed>> V =
this->dumper()->getVersionDependencies(Sec);
if (!V) {
this->reportUniqueWarning(V.takeError());
return;
}
for (const VerNeed &VN : *V) {
OS << format(" 0x%04x: Version: %u File: %s Cnt: %u\n", VN.Offset,
VN.Version, VN.File.data(), VN.Cnt);
for (const VernAux &Aux : VN.AuxV)
OS << format(" 0x%04x: Name: %s Flags: %s Version: %u\n", Aux.Offset,
Aux.Name.data(), versionFlagToString(Aux.Flags).c_str(),
Aux.Other);
}
OS << '\n';
}
template <class ELFT>
void GNUStyle<ELFT>::printHashHistogram(const Elf_Hash &HashTable) {
size_t NBucket = HashTable.nbucket;
size_t NChain = HashTable.nchain;
ArrayRef<Elf_Word> Buckets = HashTable.buckets();
ArrayRef<Elf_Word> Chains = HashTable.chains();
size_t TotalSyms = 0;
// If hash table is correct, we have at least chains with 0 length
size_t MaxChain = 1;
size_t CumulativeNonZero = 0;
if (NChain == 0 || NBucket == 0)
return;
std::vector<size_t> ChainLen(NBucket, 0);
// Go over all buckets and and note chain lengths of each bucket (total
// unique chain lengths).
for (size_t B = 0; B < NBucket; B++) {
std::vector<bool> Visited(NChain);
for (size_t C = Buckets[B]; C < NChain; C = Chains[C]) {
if (C == ELF::STN_UNDEF)
break;
if (Visited[C]) {
reportWarning(createError(".hash section is invalid: bucket " +
Twine(C) +
": a cycle was detected in the linked chain"),
this->FileName);
break;
}
Visited[C] = true;
if (MaxChain <= ++ChainLen[B])
MaxChain++;
}
TotalSyms += ChainLen[B];
}
if (!TotalSyms)
return;
std::vector<size_t> Count(MaxChain, 0);
// Count how long is the chain for each bucket
for (size_t B = 0; B < NBucket; B++)
++Count[ChainLen[B]];
// Print Number of buckets with each chain lengths and their cumulative
// coverage of the symbols
OS << "Histogram for bucket list length (total of " << NBucket
<< " buckets)\n"
<< " Length Number % of total Coverage\n";
for (size_t I = 0; I < MaxChain; I++) {
CumulativeNonZero += Count[I] * I;
OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I],
(Count[I] * 100.0) / NBucket,
(CumulativeNonZero * 100.0) / TotalSyms);
}
}
template <class ELFT>
void GNUStyle<ELFT>::printGnuHashHistogram(const Elf_GnuHash &GnuHashTable) {
size_t NBucket = GnuHashTable.nbuckets;
ArrayRef<Elf_Word> Buckets = GnuHashTable.buckets();
unsigned NumSyms = this->dumper()->dynamic_symbols().size();
if (!NumSyms)
return;
ArrayRef<Elf_Word> Chains = GnuHashTable.values(NumSyms);
size_t Symndx = GnuHashTable.symndx;
size_t TotalSyms = 0;
size_t MaxChain = 1;
size_t CumulativeNonZero = 0;
if (Chains.empty() || NBucket == 0)
return;
std::vector<size_t> ChainLen(NBucket, 0);
for (size_t B = 0; B < NBucket; B++) {
if (!Buckets[B])
continue;
size_t Len = 1;
for (size_t C = Buckets[B] - Symndx;
C < Chains.size() && (Chains[C] & 1) == 0; C++)
if (MaxChain < ++Len)
MaxChain++;
ChainLen[B] = Len;
TotalSyms += Len;
}
MaxChain++;
if (!TotalSyms)
return;
std::vector<size_t> Count(MaxChain, 0);
for (size_t B = 0; B < NBucket; B++)
++Count[ChainLen[B]];
// Print Number of buckets with each chain lengths and their cumulative
// coverage of the symbols
OS << "Histogram for `.gnu.hash' bucket list length (total of " << NBucket
<< " buckets)\n"
<< " Length Number % of total Coverage\n";
for (size_t I = 0; I < MaxChain; I++) {
CumulativeNonZero += Count[I] * I;
OS << format("%7lu %-10lu (%5.1f%%) %5.1f%%\n", I, Count[I],
(Count[I] * 100.0) / NBucket,
(CumulativeNonZero * 100.0) / TotalSyms);
}
}
// Hash histogram shows statistics of how efficient the hash was for the
// dynamic symbol table. The table shows the number of hash buckets for
// different lengths of chains as an absolute number and percentage of the total
// buckets, and the cumulative coverage of symbols for each set of buckets.
template <class ELFT>
void GNUStyle<ELFT>::printHashHistograms(const ELFFile<ELFT> *Obj) {
// Print histogram for the .hash section.
if (const Elf_Hash *HashTable = this->dumper()->getHashTable()) {
if (Error E = checkHashTable<ELFT>(Obj, HashTable))
this->reportUniqueWarning(std::move(E));
else
printHashHistogram(*HashTable);
}
// Print histogram for the .gnu.hash section.
if (const Elf_GnuHash *GnuHashTable = this->dumper()->getGnuHashTable()) {
if (Error E = checkGNUHashTable<ELFT>(Obj, GnuHashTable))
this->reportUniqueWarning(std::move(E));
else
printGnuHashHistogram(*GnuHashTable);
}
}
template <class ELFT>
void GNUStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) {
OS << "GNUStyle::printCGProfile not implemented\n";
}
template <class ELFT>
void GNUStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) {
reportError(createError("--addrsig: not implemented"), this->FileName);
}
static StringRef getGenericNoteTypeName(const uint32_t NT) {
static const struct {
uint32_t ID;
const char *Name;
} Notes[] = {
{ELF::NT_VERSION, "NT_VERSION (version)"},
{ELF::NT_ARCH, "NT_ARCH (architecture)"},
{ELF::NT_GNU_BUILD_ATTRIBUTE_OPEN, "OPEN"},
{ELF::NT_GNU_BUILD_ATTRIBUTE_FUNC, "func"},
};
for (const auto &Note : Notes)
if (Note.ID == NT)
return Note.Name;
return "";
}
static StringRef getCoreNoteTypeName(const uint32_t NT) {
static const struct {
uint32_t ID;
const char *Name;
} Notes[] = {
{ELF::NT_PRSTATUS, "NT_PRSTATUS (prstatus structure)"},
{ELF::NT_FPREGSET, "NT_FPREGSET (floating point registers)"},
{ELF::NT_PRPSINFO, "NT_PRPSINFO (prpsinfo structure)"},
{ELF::NT_TASKSTRUCT, "NT_TASKSTRUCT (task structure)"},
{ELF::NT_AUXV, "NT_AUXV (auxiliary vector)"},
{ELF::NT_PSTATUS, "NT_PSTATUS (pstatus structure)"},
{ELF::NT_FPREGS, "NT_FPREGS (floating point registers)"},
{ELF::NT_PSINFO, "NT_PSINFO (psinfo structure)"},
{ELF::NT_LWPSTATUS, "NT_LWPSTATUS (lwpstatus_t structure)"},
{ELF::NT_LWPSINFO, "NT_LWPSINFO (lwpsinfo_t structure)"},
{ELF::NT_WIN32PSTATUS, "NT_WIN32PSTATUS (win32_pstatus structure)"},
{ELF::NT_PPC_VMX, "NT_PPC_VMX (ppc Altivec registers)"},
{ELF::NT_PPC_VSX, "NT_PPC_VSX (ppc VSX registers)"},
{ELF::NT_PPC_TAR, "NT_PPC_TAR (ppc TAR register)"},
{ELF::NT_PPC_PPR, "NT_PPC_PPR (ppc PPR register)"},
{ELF::NT_PPC_DSCR, "NT_PPC_DSCR (ppc DSCR register)"},
{ELF::NT_PPC_EBB, "NT_PPC_EBB (ppc EBB registers)"},
{ELF::NT_PPC_PMU, "NT_PPC_PMU (ppc PMU registers)"},
{ELF::NT_PPC_TM_CGPR, "NT_PPC_TM_CGPR (ppc checkpointed GPR registers)"},
{ELF::NT_PPC_TM_CFPR,
"NT_PPC_TM_CFPR (ppc checkpointed floating point registers)"},
{ELF::NT_PPC_TM_CVMX,
"NT_PPC_TM_CVMX (ppc checkpointed Altivec registers)"},
{ELF::NT_PPC_TM_CVSX, "NT_PPC_TM_CVSX (ppc checkpointed VSX registers)"},
{ELF::NT_PPC_TM_SPR, "NT_PPC_TM_SPR (ppc TM special purpose registers)"},
{ELF::NT_PPC_TM_CTAR, "NT_PPC_TM_CTAR (ppc checkpointed TAR register)"},
{ELF::NT_PPC_TM_CPPR, "NT_PPC_TM_CPPR (ppc checkpointed PPR register)"},
{ELF::NT_PPC_TM_CDSCR,
"NT_PPC_TM_CDSCR (ppc checkpointed DSCR register)"},
{ELF::NT_386_TLS, "NT_386_TLS (x86 TLS information)"},
{ELF::NT_386_IOPERM, "NT_386_IOPERM (x86 I/O permissions)"},
{ELF::NT_X86_XSTATE, "NT_X86_XSTATE (x86 XSAVE extended state)"},
{ELF::NT_S390_HIGH_GPRS,
"NT_S390_HIGH_GPRS (s390 upper register halves)"},
{ELF::NT_S390_TIMER, "NT_S390_TIMER (s390 timer register)"},
{ELF::NT_S390_TODCMP, "NT_S390_TODCMP (s390 TOD comparator register)"},
{ELF::NT_S390_TODPREG,
"NT_S390_TODPREG (s390 TOD programmable register)"},
{ELF::NT_S390_CTRS, "NT_S390_CTRS (s390 control registers)"},
{ELF::NT_S390_PREFIX, "NT_S390_PREFIX (s390 prefix register)"},
{ELF::NT_S390_LAST_BREAK,
"NT_S390_LAST_BREAK (s390 last breaking event address)"},
{ELF::NT_S390_SYSTEM_CALL,
"NT_S390_SYSTEM_CALL (s390 system call restart data)"},
{ELF::NT_S390_TDB, "NT_S390_TDB (s390 transaction diagnostic block)"},
{ELF::NT_S390_VXRS_LOW,
"NT_S390_VXRS_LOW (s390 vector registers 0-15 upper half)"},
{ELF::NT_S390_VXRS_HIGH,
"NT_S390_VXRS_HIGH (s390 vector registers 16-31)"},
{ELF::NT_S390_GS_CB, "NT_S390_GS_CB (s390 guarded-storage registers)"},
{ELF::NT_S390_GS_BC,
"NT_S390_GS_BC (s390 guarded-storage broadcast control)"},
{ELF::NT_ARM_VFP, "NT_ARM_VFP (arm VFP registers)"},
{ELF::NT_ARM_TLS, "NT_ARM_TLS (AArch TLS registers)"},
{ELF::NT_ARM_HW_BREAK,
"NT_ARM_HW_BREAK (AArch hardware breakpoint registers)"},
{ELF::NT_ARM_HW_WATCH,
"NT_ARM_HW_WATCH (AArch hardware watchpoint registers)"},
{ELF::NT_FILE, "NT_FILE (mapped files)"},
{ELF::NT_PRXFPREG, "NT_PRXFPREG (user_xfpregs structure)"},
{ELF::NT_SIGINFO, "NT_SIGINFO (siginfo_t data)"},
};
for (const auto &Note : Notes)
if (Note.ID == NT)
return Note.Name;
return "";
}
static std::string getGNUNoteTypeName(const uint32_t NT) {
static const struct {
uint32_t ID;
const char *Name;
} Notes[] = {
{ELF::NT_GNU_ABI_TAG, "NT_GNU_ABI_TAG (ABI version tag)"},
{ELF::NT_GNU_HWCAP, "NT_GNU_HWCAP (DSO-supplied software HWCAP info)"},
{ELF::NT_GNU_BUILD_ID, "NT_GNU_BUILD_ID (unique build ID bitstring)"},
{ELF::NT_GNU_GOLD_VERSION, "NT_GNU_GOLD_VERSION (gold version)"},
{ELF::NT_GNU_PROPERTY_TYPE_0, "NT_GNU_PROPERTY_TYPE_0 (property note)"},
};
for (const auto &Note : Notes)
if (Note.ID == NT)
return std::string(Note.Name);
std::string string;
raw_string_ostream OS(string);
OS << format("Unknown note type (0x%08x)", NT);
return OS.str();
}
static std::string getFreeBSDNoteTypeName(const uint32_t NT) {
static const struct {
uint32_t ID;
const char *Name;
} Notes[] = {
{ELF::NT_FREEBSD_THRMISC, "NT_THRMISC (thrmisc structure)"},
{ELF::NT_FREEBSD_PROCSTAT_PROC, "NT_PROCSTAT_PROC (proc data)"},
{ELF::NT_FREEBSD_PROCSTAT_FILES, "NT_PROCSTAT_FILES (files data)"},
{ELF::NT_FREEBSD_PROCSTAT_VMMAP, "NT_PROCSTAT_VMMAP (vmmap data)"},
{ELF::NT_FREEBSD_PROCSTAT_GROUPS, "NT_PROCSTAT_GROUPS (groups data)"},
{ELF::NT_FREEBSD_PROCSTAT_UMASK, "NT_PROCSTAT_UMASK (umask data)"},
{ELF::NT_FREEBSD_PROCSTAT_RLIMIT, "NT_PROCSTAT_RLIMIT (rlimit data)"},
{ELF::NT_FREEBSD_PROCSTAT_OSREL, "NT_PROCSTAT_OSREL (osreldate data)"},
{ELF::NT_FREEBSD_PROCSTAT_PSSTRINGS,
"NT_PROCSTAT_PSSTRINGS (ps_strings data)"},
{ELF::NT_FREEBSD_PROCSTAT_AUXV, "NT_PROCSTAT_AUXV (auxv data)"},
};
for (const auto &Note : Notes)
if (Note.ID == NT)
return std::string(Note.Name);
std::string string;
raw_string_ostream OS(string);
OS << format("Unknown note type (0x%08x)", NT);
return OS.str();
}
static std::string getAMDNoteTypeName(const uint32_t NT) {
static const struct {
uint32_t ID;
const char *Name;
} Notes[] = {{ELF::NT_AMD_AMDGPU_HSA_METADATA,
"NT_AMD_AMDGPU_HSA_METADATA (HSA Metadata)"},
{ELF::NT_AMD_AMDGPU_ISA, "NT_AMD_AMDGPU_ISA (ISA Version)"},
{ELF::NT_AMD_AMDGPU_PAL_METADATA,
"NT_AMD_AMDGPU_PAL_METADATA (PAL Metadata)"}};
for (const auto &Note : Notes)
if (Note.ID == NT)
return std::string(Note.Name);
std::string string;
raw_string_ostream OS(string);
OS << format("Unknown note type (0x%08x)", NT);
return OS.str();
}
static std::string getAMDGPUNoteTypeName(const uint32_t NT) {
if (NT == ELF::NT_AMDGPU_METADATA)
return std::string("NT_AMDGPU_METADATA (AMDGPU Metadata)");
std::string string;
raw_string_ostream OS(string);
OS << format("Unknown note type (0x%08x)", NT);
return OS.str();
}
template <typename ELFT>
static std::string getGNUProperty(uint32_t Type, uint32_t DataSize,
ArrayRef<uint8_t> Data) {
std::string str;
raw_string_ostream OS(str);
uint32_t PrData;
auto DumpBit = [&](uint32_t Flag, StringRef Name) {
if (PrData & Flag) {
PrData &= ~Flag;
OS << Name;
if (PrData)
OS << ", ";
}
};
switch (Type) {
default:
OS << format("<application-specific type 0x%x>", Type);
return OS.str();
case GNU_PROPERTY_STACK_SIZE: {
OS << "stack size: ";
if (DataSize == sizeof(typename ELFT::uint))
OS << formatv("{0:x}",
(uint64_t)(*(const typename ELFT::Addr *)Data.data()));
else
OS << format("<corrupt length: 0x%x>", DataSize);
return OS.str();
}
case GNU_PROPERTY_NO_COPY_ON_PROTECTED:
OS << "no copy on protected";
if (DataSize)
OS << format(" <corrupt length: 0x%x>", DataSize);
return OS.str();
case GNU_PROPERTY_AARCH64_FEATURE_1_AND:
case GNU_PROPERTY_X86_FEATURE_1_AND:
OS << ((Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) ? "aarch64 feature: "
: "x86 feature: ");
if (DataSize != 4) {
OS << format("<corrupt length: 0x%x>", DataSize);
return OS.str();
}
PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data());
if (PrData == 0) {
OS << "<None>";
return OS.str();
}
if (Type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) {
DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_BTI, "BTI");
DumpBit(GNU_PROPERTY_AARCH64_FEATURE_1_PAC, "PAC");
} else {
DumpBit(GNU_PROPERTY_X86_FEATURE_1_IBT, "IBT");
DumpBit(GNU_PROPERTY_X86_FEATURE_1_SHSTK, "SHSTK");
}
if (PrData)
OS << format("<unknown flags: 0x%x>", PrData);
return OS.str();
case GNU_PROPERTY_X86_ISA_1_NEEDED:
case GNU_PROPERTY_X86_ISA_1_USED:
OS << "x86 ISA "
<< (Type == GNU_PROPERTY_X86_ISA_1_NEEDED ? "needed: " : "used: ");
if (DataSize != 4) {
OS << format("<corrupt length: 0x%x>", DataSize);
return OS.str();
}
PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data());
if (PrData == 0) {
OS << "<None>";
return OS.str();
}
DumpBit(GNU_PROPERTY_X86_ISA_1_CMOV, "CMOV");
DumpBit(GNU_PROPERTY_X86_ISA_1_SSE, "SSE");
DumpBit(GNU_PROPERTY_X86_ISA_1_SSE2, "SSE2");
DumpBit(GNU_PROPERTY_X86_ISA_1_SSE3, "SSE3");
DumpBit(GNU_PROPERTY_X86_ISA_1_SSSE3, "SSSE3");
DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_1, "SSE4_1");
DumpBit(GNU_PROPERTY_X86_ISA_1_SSE4_2, "SSE4_2");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX, "AVX");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX2, "AVX2");
DumpBit(GNU_PROPERTY_X86_ISA_1_FMA, "FMA");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512F, "AVX512F");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512CD, "AVX512CD");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512ER, "AVX512ER");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512PF, "AVX512PF");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512VL, "AVX512VL");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512DQ, "AVX512DQ");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512BW, "AVX512BW");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4FMAPS, "AVX512_4FMAPS");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_4VNNIW, "AVX512_4VNNIW");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_BITALG, "AVX512_BITALG");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_IFMA, "AVX512_IFMA");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI, "AVX512_VBMI");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VBMI2, "AVX512_VBMI2");
DumpBit(GNU_PROPERTY_X86_ISA_1_AVX512_VNNI, "AVX512_VNNI");
if (PrData)
OS << format("<unknown flags: 0x%x>", PrData);
return OS.str();
break;
case GNU_PROPERTY_X86_FEATURE_2_NEEDED:
case GNU_PROPERTY_X86_FEATURE_2_USED:
OS << "x86 feature "
<< (Type == GNU_PROPERTY_X86_FEATURE_2_NEEDED ? "needed: " : "used: ");
if (DataSize != 4) {
OS << format("<corrupt length: 0x%x>", DataSize);
return OS.str();
}
PrData = support::endian::read32<ELFT::TargetEndianness>(Data.data());
if (PrData == 0) {
OS << "<None>";
return OS.str();
}
DumpBit(GNU_PROPERTY_X86_FEATURE_2_X86, "x86");
DumpBit(GNU_PROPERTY_X86_FEATURE_2_X87, "x87");
DumpBit(GNU_PROPERTY_X86_FEATURE_2_MMX, "MMX");
DumpBit(GNU_PROPERTY_X86_FEATURE_2_XMM, "XMM");
DumpBit(GNU_PROPERTY_X86_FEATURE_2_YMM, "YMM");
DumpBit(GNU_PROPERTY_X86_FEATURE_2_ZMM, "ZMM");
DumpBit(GNU_PROPERTY_X86_FEATURE_2_FXSR, "FXSR");
DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVE, "XSAVE");
DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEOPT, "XSAVEOPT");
DumpBit(GNU_PROPERTY_X86_FEATURE_2_XSAVEC, "XSAVEC");
if (PrData)
OS << format("<unknown flags: 0x%x>", PrData);
return OS.str();
}
}
template <typename ELFT>
static SmallVector<std::string, 4> getGNUPropertyList(ArrayRef<uint8_t> Arr) {
using Elf_Word = typename ELFT::Word;
SmallVector<std::string, 4> Properties;
while (Arr.size() >= 8) {
uint32_t Type = *reinterpret_cast<const Elf_Word *>(Arr.data());
uint32_t DataSize = *reinterpret_cast<const Elf_Word *>(Arr.data() + 4);
Arr = Arr.drop_front(8);
// Take padding size into account if present.
uint64_t PaddedSize = alignTo(DataSize, sizeof(typename ELFT::uint));
std::string str;
raw_string_ostream OS(str);
if (Arr.size() < PaddedSize) {
OS << format("<corrupt type (0x%x) datasz: 0x%x>", Type, DataSize);
Properties.push_back(OS.str());
break;
}
Properties.push_back(
getGNUProperty<ELFT>(Type, DataSize, Arr.take_front(PaddedSize)));
Arr = Arr.drop_front(PaddedSize);
}
if (!Arr.empty())
Properties.push_back("<corrupted GNU_PROPERTY_TYPE_0>");
return Properties;
}
struct GNUAbiTag {
std::string OSName;
std::string ABI;
bool IsValid;
};
template <typename ELFT> static GNUAbiTag getGNUAbiTag(ArrayRef<uint8_t> Desc) {
typedef typename ELFT::Word Elf_Word;
ArrayRef<Elf_Word> Words(reinterpret_cast<const Elf_Word *>(Desc.begin()),
reinterpret_cast<const Elf_Word *>(Desc.end()));
if (Words.size() < 4)
return {"", "", /*IsValid=*/false};
static const char *OSNames[] = {
"Linux", "Hurd", "Solaris", "FreeBSD", "NetBSD", "Syllable", "NaCl",
};
StringRef OSName = "Unknown";
if (Words[0] < array_lengthof(OSNames))
OSName = OSNames[Words[0]];
uint32_t Major = Words[1], Minor = Words[2], Patch = Words[3];
std::string str;
raw_string_ostream ABI(str);
ABI << Major << "." << Minor << "." << Patch;
return {std::string(OSName), ABI.str(), /*IsValid=*/true};
}
static std::string getGNUBuildId(ArrayRef<uint8_t> Desc) {
std::string str;
raw_string_ostream OS(str);
for (const auto &B : Desc)
OS << format_hex_no_prefix(B, 2);
return OS.str();
}
static StringRef getGNUGoldVersion(ArrayRef<uint8_t> Desc) {
return StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size());
}
template <typename ELFT>
static void printGNUNote(raw_ostream &OS, uint32_t NoteType,
ArrayRef<uint8_t> Desc) {
switch (NoteType) {
default:
return;
case ELF::NT_GNU_ABI_TAG: {
const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc);
if (!AbiTag.IsValid)
OS << " <corrupt GNU_ABI_TAG>";
else
OS << " OS: " << AbiTag.OSName << ", ABI: " << AbiTag.ABI;
break;
}
case ELF::NT_GNU_BUILD_ID: {
OS << " Build ID: " << getGNUBuildId(Desc);
break;
}
case ELF::NT_GNU_GOLD_VERSION:
OS << " Version: " << getGNUGoldVersion(Desc);
break;
case ELF::NT_GNU_PROPERTY_TYPE_0:
OS << " Properties:";
for (const auto &Property : getGNUPropertyList<ELFT>(Desc))
OS << " " << Property << "\n";
break;
}
OS << '\n';
}
struct AMDNote {
std::string Type;
std::string Value;
};
template <typename ELFT>
static AMDNote getAMDNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) {
switch (NoteType) {
default:
return {"", ""};
case ELF::NT_AMD_AMDGPU_HSA_METADATA:
return {
"HSA Metadata",
std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())};
case ELF::NT_AMD_AMDGPU_ISA:
return {
"ISA Version",
std::string(reinterpret_cast<const char *>(Desc.data()), Desc.size())};
}
}
struct AMDGPUNote {
std::string Type;
std::string Value;
};
template <typename ELFT>
static AMDGPUNote getAMDGPUNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) {
switch (NoteType) {
default:
return {"", ""};
case ELF::NT_AMDGPU_METADATA: {
auto MsgPackString =
StringRef(reinterpret_cast<const char *>(Desc.data()), Desc.size());
msgpack::Document MsgPackDoc;
if (!MsgPackDoc.readFromBlob(MsgPackString, /*Multi=*/false))
return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"};
AMDGPU::HSAMD::V3::MetadataVerifier Verifier(true);
if (!Verifier.verify(MsgPackDoc.getRoot()))
return {"AMDGPU Metadata", "Invalid AMDGPU Metadata"};
std::string HSAMetadataString;
raw_string_ostream StrOS(HSAMetadataString);
MsgPackDoc.toYAML(StrOS);
return {"AMDGPU Metadata", StrOS.str()};
}
}
}
struct CoreFileMapping {
uint64_t Start, End, Offset;
StringRef Filename;
};
struct CoreNote {
uint64_t PageSize;
std::vector<CoreFileMapping> Mappings;
};
static Expected<CoreNote> readCoreNote(DataExtractor Desc) {
// Expected format of the NT_FILE note description:
// 1. # of file mappings (call it N)
// 2. Page size
// 3. N (start, end, offset) triples
// 4. N packed filenames (null delimited)
// Each field is an Elf_Addr, except for filenames which are char* strings.
CoreNote Ret;
const int Bytes = Desc.getAddressSize();
if (!Desc.isValidOffsetForAddress(2))
return createStringError(object_error::parse_failed,
"malformed note: header too short");
if (Desc.getData().back() != 0)
return createStringError(object_error::parse_failed,
"malformed note: not NUL terminated");
uint64_t DescOffset = 0;
uint64_t FileCount = Desc.getAddress(&DescOffset);
Ret.PageSize = Desc.getAddress(&DescOffset);
if (!Desc.isValidOffsetForAddress(3 * FileCount * Bytes))
return createStringError(object_error::parse_failed,
"malformed note: too short for number of files");
uint64_t FilenamesOffset = 0;
DataExtractor Filenames(
Desc.getData().drop_front(DescOffset + 3 * FileCount * Bytes),
Desc.isLittleEndian(), Desc.getAddressSize());
Ret.Mappings.resize(FileCount);
for (CoreFileMapping &Mapping : Ret.Mappings) {
if (!Filenames.isValidOffsetForDataOfSize(FilenamesOffset, 1))
return createStringError(object_error::parse_failed,
"malformed note: too few filenames");
Mapping.Start = Desc.getAddress(&DescOffset);
Mapping.End = Desc.getAddress(&DescOffset);
Mapping.Offset = Desc.getAddress(&DescOffset);
Mapping.Filename = Filenames.getCStrRef(&FilenamesOffset);
}
return Ret;
}
template <typename ELFT>
static void printCoreNote(raw_ostream &OS, const CoreNote &Note) {
// Length of "0x<address>" string.
const int FieldWidth = ELFT::Is64Bits ? 18 : 10;
OS << " Page size: " << format_decimal(Note.PageSize, 0) << '\n';
OS << " " << right_justify("Start", FieldWidth) << " "
<< right_justify("End", FieldWidth) << " "
<< right_justify("Page Offset", FieldWidth) << '\n';
for (const CoreFileMapping &Mapping : Note.Mappings) {
OS << " " << format_hex(Mapping.Start, FieldWidth) << " "
<< format_hex(Mapping.End, FieldWidth) << " "
<< format_hex(Mapping.Offset, FieldWidth) << "\n "
<< Mapping.Filename << '\n';
}
}
template <class ELFT>
void GNUStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) {
auto PrintHeader = [&](Optional<StringRef> SecName,
const typename ELFT::Off Offset,
const typename ELFT::Addr Size) {
OS << "Displaying notes found ";
if (SecName)
OS << "in: " << *SecName << "\n";
else
OS << "at file offset " << format_hex(Offset, 10) << " with length "
<< format_hex(Size, 10) << ":\n";
OS << " Owner Data size \tDescription\n";
};
auto ProcessNote = [&](const Elf_Note &Note) {
StringRef Name = Note.getName();
ArrayRef<uint8_t> Descriptor = Note.getDesc();
Elf_Word Type = Note.getType();
// Print the note owner/type.
OS << " " << left_justify(Name, 20) << ' '
<< format_hex(Descriptor.size(), 10) << '\t';
if (Name == "GNU") {
OS << getGNUNoteTypeName(Type) << '\n';
} else if (Name == "FreeBSD") {
OS << getFreeBSDNoteTypeName(Type) << '\n';
} else if (Name == "AMD") {
OS << getAMDNoteTypeName(Type) << '\n';
} else if (Name == "AMDGPU") {
OS << getAMDGPUNoteTypeName(Type) << '\n';
} else {
StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE
? getCoreNoteTypeName(Type)
: getGenericNoteTypeName(Type);
if (!NoteType.empty())
OS << NoteType << '\n';
else
OS << "Unknown note type: (" << format_hex(Type, 10) << ")\n";
}
// Print the description, or fallback to printing raw bytes for unknown
// owners.
if (Name == "GNU") {
printGNUNote<ELFT>(OS, Type, Descriptor);
} else if (Name == "AMD") {
const AMDNote N = getAMDNote<ELFT>(Type, Descriptor);
if (!N.Type.empty())
OS << " " << N.Type << ":\n " << N.Value << '\n';
} else if (Name == "AMDGPU") {
const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor);
if (!N.Type.empty())
OS << " " << N.Type << ":\n " << N.Value << '\n';
} else if (Name == "CORE") {
if (Type == ELF::NT_FILE) {
DataExtractor DescExtractor(Descriptor,
ELFT::TargetEndianness == support::little,
sizeof(Elf_Addr));
Expected<CoreNote> Note = readCoreNote(DescExtractor);
if (Note)
printCoreNote<ELFT>(OS, *Note);
else
reportWarning(Note.takeError(), this->FileName);
}
} else if (!Descriptor.empty()) {
OS << " description data:";
for (uint8_t B : Descriptor)
OS << " " << format("%02x", B);
OS << '\n';
}
};
ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections());
if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) {
for (const auto &S : Sections) {
if (S.sh_type != SHT_NOTE)
continue;
PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset,
S.sh_size);
Error Err = Error::success();
for (auto Note : Obj->notes(S, Err))
ProcessNote(Note);
if (Err)
reportError(std::move(Err), this->FileName);
}
} else {
for (const auto &P :
unwrapOrError(this->FileName, Obj->program_headers())) {
if (P.p_type != PT_NOTE)
continue;
PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz);
Error Err = Error::success();
for (auto Note : Obj->notes(P, Err))
ProcessNote(Note);
if (Err)
reportError(std::move(Err), this->FileName);
}
}
}
template <class ELFT>
void GNUStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) {
OS << "printELFLinkerOptions not implemented!\n";
}
template <class ELFT>
void DumpStyle<ELFT>::printDependentLibsHelper(
const ELFFile<ELFT> *Obj,
function_ref<void(const Elf_Shdr &)> OnSectionStart,
function_ref<void(StringRef, uint64_t)> OnLibEntry) {
auto Warn = [this](unsigned SecNdx, StringRef Msg) {
this->reportUniqueWarning(
createError("SHT_LLVM_DEPENDENT_LIBRARIES section at index " +
Twine(SecNdx) + " is broken: " + Msg));
};
unsigned I = -1;
for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) {
++I;
if (Shdr.sh_type != ELF::SHT_LLVM_DEPENDENT_LIBRARIES)
continue;
OnSectionStart(Shdr);
Expected<ArrayRef<uint8_t>> ContentsOrErr = Obj->getSectionContents(&Shdr);
if (!ContentsOrErr) {
Warn(I, toString(ContentsOrErr.takeError()));
continue;
}
ArrayRef<uint8_t> Contents = *ContentsOrErr;
if (!Contents.empty() && Contents.back() != 0) {
Warn(I, "the content is not null-terminated");
continue;
}
for (const uint8_t *I = Contents.begin(), *E = Contents.end(); I < E;) {
StringRef Lib((const char *)I);
OnLibEntry(Lib, I - Contents.begin());
I += Lib.size() + 1;
}
}
}
template <class ELFT>
void GNUStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) {
bool SectionStarted = false;
struct NameOffset {
StringRef Name;
uint64_t Offset;
};
std::vector<NameOffset> SecEntries;
NameOffset Current;
auto PrintSection = [&]() {
OS << "Dependent libraries section " << Current.Name << " at offset "
<< format_hex(Current.Offset, 1) << " contains " << SecEntries.size()
<< " entries:\n";
for (NameOffset Entry : SecEntries)
OS << " [" << format("%6tx", Entry.Offset) << "] " << Entry.Name
<< "\n";
OS << "\n";
SecEntries.clear();
};
auto OnSectionStart = [&](const Elf_Shdr &Shdr) {
if (SectionStarted)
PrintSection();
SectionStarted = true;
Current.Offset = Shdr.sh_offset;
Expected<StringRef> Name = Obj->getSectionName(&Shdr);
if (!Name) {
Current.Name = "<?>";
this->reportUniqueWarning(
createError("cannot get section name of "
"SHT_LLVM_DEPENDENT_LIBRARIES section: " +
toString(Name.takeError())));
} else {
Current.Name = *Name;
}
};
auto OnLibEntry = [&](StringRef Lib, uint64_t Offset) {
SecEntries.push_back(NameOffset{Lib, Offset});
};
this->printDependentLibsHelper(Obj, OnSectionStart, OnLibEntry);
if (SectionStarted)
PrintSection();
}
// Used for printing section names in places where possible errors can be
// ignored.
static StringRef getSectionName(const SectionRef &Sec) {
Expected<StringRef> NameOrErr = Sec.getName();
if (NameOrErr)
return *NameOrErr;
consumeError(NameOrErr.takeError());
return "<?>";
}
// Used for printing symbol names in places where possible errors can be
// ignored.
static std::string getSymbolName(const ELFSymbolRef &Sym) {
Expected<StringRef> NameOrErr = Sym.getName();
if (NameOrErr)
return maybeDemangle(*NameOrErr);
consumeError(NameOrErr.takeError());
return "<?>";
}
template <class ELFT>
void DumpStyle<ELFT>::printFunctionStackSize(const ELFObjectFile<ELFT> *Obj,
uint64_t SymValue,
Optional<SectionRef> FunctionSec,
const StringRef SectionName,
DataExtractor Data,
uint64_t *Offset) {
// This function ignores potentially erroneous input, unless it is directly
// related to stack size reporting.
SymbolRef FuncSym;
for (const ELFSymbolRef &Symbol : Obj->symbols()) {
Expected<uint64_t> SymAddrOrErr = Symbol.getAddress();
if (!SymAddrOrErr) {
consumeError(SymAddrOrErr.takeError());
continue;
}
if (Expected<uint32_t> SymFlags = Symbol.getFlags()) {
if (*SymFlags & SymbolRef::SF_Undefined)
continue;
} else
consumeError(SymFlags.takeError());
if (Symbol.getELFType() == ELF::STT_FUNC && *SymAddrOrErr == SymValue) {
// Check if the symbol is in the right section. FunctionSec == None means
// "any section".
if (!FunctionSec || FunctionSec->containsSymbol(Symbol)) {
FuncSym = Symbol;
break;
}
}
}
std::string FuncName = "?";
// A valid SymbolRef has a non-null object file pointer.
if (FuncSym.BasicSymbolRef::getObject())
FuncName = getSymbolName(FuncSym);
else
reportWarning(
createError("could not identify function symbol for stack size entry"),
Obj->getFileName());
// Extract the size. The expectation is that Offset is pointing to the right
// place, i.e. past the function address.
uint64_t PrevOffset = *Offset;
uint64_t StackSize = Data.getULEB128(Offset);
// getULEB128() does not advance Offset if it is not able to extract a valid
// integer.
if (*Offset == PrevOffset)
reportError(
createStringError(object_error::parse_failed,
"could not extract a valid stack size in section %s",
SectionName.data()),
Obj->getFileName());
printStackSizeEntry(StackSize, FuncName);
}
template <class ELFT>
void GNUStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) {
OS.PadToColumn(2);
OS << format_decimal(Size, 11);
OS.PadToColumn(18);
OS << FuncName << "\n";
}
template <class ELFT>
void DumpStyle<ELFT>::printStackSize(const ELFObjectFile<ELFT> *Obj,
RelocationRef Reloc,
SectionRef FunctionSec,
const StringRef &StackSizeSectionName,
const RelocationResolver &Resolver,
DataExtractor Data) {
// This function ignores potentially erroneous input, unless it is directly
// related to stack size reporting.
object::symbol_iterator RelocSym = Reloc.getSymbol();
uint64_t RelocSymValue = 0;
StringRef FileStr = Obj->getFileName();
if (RelocSym != Obj->symbol_end()) {
// Ensure that the relocation symbol is in the function section, i.e. the
// section where the functions whose stack sizes we are reporting are
// located.
auto SectionOrErr = RelocSym->getSection();
if (!SectionOrErr) {
reportWarning(
createError("cannot identify the section for relocation symbol '" +
getSymbolName(*RelocSym) + "'"),
FileStr);
consumeError(SectionOrErr.takeError());
} else if (*SectionOrErr != FunctionSec) {
reportWarning(createError("relocation symbol '" +
getSymbolName(*RelocSym) +
"' is not in the expected section"),
FileStr);
// Pretend that the symbol is in the correct section and report its
// stack size anyway.
FunctionSec = **SectionOrErr;
}
Expected<uint64_t> RelocSymValueOrErr = RelocSym->getValue();
if (RelocSymValueOrErr)
RelocSymValue = *RelocSymValueOrErr;
else
consumeError(RelocSymValueOrErr.takeError());
}
uint64_t Offset = Reloc.getOffset();
if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1))
reportError(
createStringError(object_error::parse_failed,
"found invalid relocation offset into section %s "
"while trying to extract a stack size entry",
StackSizeSectionName.data()),
FileStr);
uint64_t Addend = Data.getAddress(&Offset);
uint64_t SymValue = Resolver(Reloc, RelocSymValue, Addend);
this->printFunctionStackSize(Obj, SymValue, FunctionSec, StackSizeSectionName,
Data, &Offset);
}
template <class ELFT>
void DumpStyle<ELFT>::printNonRelocatableStackSizes(
const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) {
// This function ignores potentially erroneous input, unless it is directly
// related to stack size reporting.
const ELFFile<ELFT> *EF = Obj->getELFFile();
StringRef FileStr = Obj->getFileName();
for (const SectionRef &Sec : Obj->sections()) {
StringRef SectionName = getSectionName(Sec);
if (SectionName != ".stack_sizes")
continue;
PrintHeader();
const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl());
ArrayRef<uint8_t> Contents =
unwrapOrError(this->FileName, EF->getSectionContents(ElfSec));
DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr));
uint64_t Offset = 0;
while (Offset < Contents.size()) {
// The function address is followed by a ULEB representing the stack
// size. Check for an extra byte before we try to process the entry.
if (!Data.isValidOffsetForDataOfSize(Offset, sizeof(Elf_Addr) + 1)) {
reportError(
createStringError(
object_error::parse_failed,
"section %s ended while trying to extract a stack size entry",
SectionName.data()),
FileStr);
}
uint64_t SymValue = Data.getAddress(&Offset);
printFunctionStackSize(Obj, SymValue, /*FunctionSec=*/None, SectionName,
Data, &Offset);
}
}
}
template <class ELFT>
void DumpStyle<ELFT>::printRelocatableStackSizes(
const ELFObjectFile<ELFT> *Obj, std::function<void()> PrintHeader) {
const ELFFile<ELFT> *EF = Obj->getELFFile();
// Build a map between stack size sections and their corresponding relocation
// sections.
llvm::MapVector<SectionRef, SectionRef> StackSizeRelocMap;
const SectionRef NullSection{};
for (const SectionRef &Sec : Obj->sections()) {
StringRef SectionName;
if (Expected<StringRef> NameOrErr = Sec.getName())
SectionName = *NameOrErr;
else
consumeError(NameOrErr.takeError());
// A stack size section that we haven't encountered yet is mapped to the
// null section until we find its corresponding relocation section.
if (SectionName == ".stack_sizes")
if (StackSizeRelocMap.count(Sec) == 0) {
StackSizeRelocMap[Sec] = NullSection;
continue;
}
// Check relocation sections if they are relocating contents of a
// stack sizes section.
const Elf_Shdr *ElfSec = Obj->getSection(Sec.getRawDataRefImpl());
uint32_t SectionType = ElfSec->sh_type;
if (SectionType != ELF::SHT_RELA && SectionType != ELF::SHT_REL)
continue;
Expected<section_iterator> RelSecOrErr = Sec.getRelocatedSection();
if (!RelSecOrErr)
reportError(createStringError(object_error::parse_failed,
"%s: failed to get a relocated section: %s",
SectionName.data(),
toString(RelSecOrErr.takeError()).c_str()),
Obj->getFileName());
const Elf_Shdr *ContentsSec =
Obj->getSection((*RelSecOrErr)->getRawDataRefImpl());
Expected<StringRef> ContentsSectionNameOrErr =
EF->getSectionName(ContentsSec);
if (!ContentsSectionNameOrErr) {
consumeError(ContentsSectionNameOrErr.takeError());
continue;
}
if (*ContentsSectionNameOrErr != ".stack_sizes")
continue;
// Insert a mapping from the stack sizes section to its relocation section.
StackSizeRelocMap[Obj->toSectionRef(ContentsSec)] = Sec;
}
for (const auto &StackSizeMapEntry : StackSizeRelocMap) {
PrintHeader();
const SectionRef &StackSizesSec = StackSizeMapEntry.first;
const SectionRef &RelocSec = StackSizeMapEntry.second;
// Warn about stack size sections without a relocation section.
StringRef StackSizeSectionName = getSectionName(StackSizesSec);
if (RelocSec == NullSection) {
reportWarning(createError("section " + StackSizeSectionName +
" does not have a corresponding "
"relocation section"),
Obj->getFileName());
continue;
}
// A .stack_sizes section header's sh_link field is supposed to point
// to the section that contains the functions whose stack sizes are
// described in it.
const Elf_Shdr *StackSizesELFSec =
Obj->getSection(StackSizesSec.getRawDataRefImpl());
const SectionRef FunctionSec = Obj->toSectionRef(unwrapOrError(
this->FileName, EF->getSection(StackSizesELFSec->sh_link)));
bool (*IsSupportedFn)(uint64_t);
RelocationResolver Resolver;
std::tie(IsSupportedFn, Resolver) = getRelocationResolver(*Obj);
auto Contents = unwrapOrError(this->FileName, StackSizesSec.getContents());
DataExtractor Data(Contents, Obj->isLittleEndian(), sizeof(Elf_Addr));
for (const RelocationRef &Reloc : RelocSec.relocations()) {
if (!IsSupportedFn || !IsSupportedFn(Reloc.getType()))
reportError(createStringError(
object_error::parse_failed,
"unsupported relocation type in section %s: %s",
getSectionName(RelocSec).data(),
EF->getRelocationTypeName(Reloc.getType()).data()),
Obj->getFileName());
this->printStackSize(Obj, Reloc, FunctionSec, StackSizeSectionName,
Resolver, Data);
}
}
}
template <class ELFT>
void GNUStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) {
bool HeaderHasBeenPrinted = false;
auto PrintHeader = [&]() {
if (HeaderHasBeenPrinted)
return;
OS << "\nStack Sizes:\n";
OS.PadToColumn(9);
OS << "Size";
OS.PadToColumn(18);
OS << "Function\n";
HeaderHasBeenPrinted = true;
};
// For non-relocatable objects, look directly for sections whose name starts
// with .stack_sizes and process the contents.
if (Obj->isRelocatableObject())
this->printRelocatableStackSizes(Obj, PrintHeader);
else
this->printNonRelocatableStackSizes(Obj, PrintHeader);
}
template <class ELFT>
void GNUStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) {
size_t Bias = ELFT::Is64Bits ? 8 : 0;
auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) {
OS.PadToColumn(2);
OS << format_hex_no_prefix(Parser.getGotAddress(E), 8 + Bias);
OS.PadToColumn(11 + Bias);
OS << format_decimal(Parser.getGotOffset(E), 6) << "(gp)";
OS.PadToColumn(22 + Bias);
OS << format_hex_no_prefix(*E, 8 + Bias);
OS.PadToColumn(31 + 2 * Bias);
OS << Purpose << "\n";
};
OS << (Parser.IsStatic ? "Static GOT:\n" : "Primary GOT:\n");
OS << " Canonical gp value: "
<< format_hex_no_prefix(Parser.getGp(), 8 + Bias) << "\n\n";
OS << " Reserved entries:\n";
if (ELFT::Is64Bits)
OS << " Address Access Initial Purpose\n";
else
OS << " Address Access Initial Purpose\n";
PrintEntry(Parser.getGotLazyResolver(), "Lazy resolver");
if (Parser.getGotModulePointer())
PrintEntry(Parser.getGotModulePointer(), "Module pointer (GNU extension)");
if (!Parser.getLocalEntries().empty()) {
OS << "\n";
OS << " Local entries:\n";
if (ELFT::Is64Bits)
OS << " Address Access Initial\n";
else
OS << " Address Access Initial\n";
for (auto &E : Parser.getLocalEntries())
PrintEntry(&E, "");
}
if (Parser.IsStatic)
return;
if (!Parser.getGlobalEntries().empty()) {
OS << "\n";
OS << " Global entries:\n";
if (ELFT::Is64Bits)
OS << " Address Access Initial Sym.Val."
<< " Type Ndx Name\n";
else
OS << " Address Access Initial Sym.Val. Type Ndx Name\n";
for (auto &E : Parser.getGlobalEntries()) {
const Elf_Sym *Sym = Parser.getGotSym(&E);
std::string SymName = this->dumper()->getFullSymbolName(
Sym, this->dumper()->getDynamicStringTable(), false);
OS.PadToColumn(2);
OS << to_string(format_hex_no_prefix(Parser.getGotAddress(&E), 8 + Bias));
OS.PadToColumn(11 + Bias);
OS << to_string(format_decimal(Parser.getGotOffset(&E), 6)) + "(gp)";
OS.PadToColumn(22 + Bias);
OS << to_string(format_hex_no_prefix(E, 8 + Bias));
OS.PadToColumn(31 + 2 * Bias);
OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias));
OS.PadToColumn(40 + 3 * Bias);
OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes));
OS.PadToColumn(48 + 3 * Bias);
OS << getSymbolSectionNdx(Parser.Obj, Sym,
this->dumper()->dynamic_symbols().begin());
OS.PadToColumn(52 + 3 * Bias);
OS << SymName << "\n";
}
}
if (!Parser.getOtherEntries().empty())
OS << "\n Number of TLS and multi-GOT entries "
<< Parser.getOtherEntries().size() << "\n";
}
template <class ELFT>
void GNUStyle<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) {
size_t Bias = ELFT::Is64Bits ? 8 : 0;
auto PrintEntry = [&](const Elf_Addr *E, StringRef Purpose) {
OS.PadToColumn(2);
OS << format_hex_no_prefix(Parser.getPltAddress(E), 8 + Bias);
OS.PadToColumn(11 + Bias);
OS << format_hex_no_prefix(*E, 8 + Bias);
OS.PadToColumn(20 + 2 * Bias);
OS << Purpose << "\n";
};
OS << "PLT GOT:\n\n";
OS << " Reserved entries:\n";
OS << " Address Initial Purpose\n";
PrintEntry(Parser.getPltLazyResolver(), "PLT lazy resolver");
if (Parser.getPltModulePointer())
PrintEntry(Parser.getPltModulePointer(), "Module pointer");
if (!Parser.getPltEntries().empty()) {
OS << "\n";
OS << " Entries:\n";
OS << " Address Initial Sym.Val. Type Ndx Name\n";
for (auto &E : Parser.getPltEntries()) {
const Elf_Sym *Sym = Parser.getPltSym(&E);
std::string SymName = this->dumper()->getFullSymbolName(
Sym, this->dumper()->getDynamicStringTable(), false);
OS.PadToColumn(2);
OS << to_string(format_hex_no_prefix(Parser.getPltAddress(&E), 8 + Bias));
OS.PadToColumn(11 + Bias);
OS << to_string(format_hex_no_prefix(E, 8 + Bias));
OS.PadToColumn(20 + 2 * Bias);
OS << to_string(format_hex_no_prefix(Sym->st_value, 8 + Bias));
OS.PadToColumn(29 + 3 * Bias);
OS << printEnum(Sym->getType(), makeArrayRef(ElfSymbolTypes));
OS.PadToColumn(37 + 3 * Bias);
OS << getSymbolSectionNdx(Parser.Obj, Sym,
this->dumper()->dynamic_symbols().begin());
OS.PadToColumn(41 + 3 * Bias);
OS << SymName << "\n";
}
}
}
template <class ELFT>
void GNUStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
const Elf_Shdr *Shdr =
findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags");
if (!Shdr)
return;
ArrayRef<uint8_t> Sec =
unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr));
if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>))
reportError(createError(".MIPS.abiflags section has a wrong size"),
ObjF->getFileName());
auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data());
OS << "MIPS ABI Flags Version: " << Flags->version << "\n\n";
OS << "ISA: MIPS" << int(Flags->isa_level);
if (Flags->isa_rev > 1)
OS << "r" << int(Flags->isa_rev);
OS << "\n";
OS << "GPR size: " << getMipsRegisterSize(Flags->gpr_size) << "\n";
OS << "CPR1 size: " << getMipsRegisterSize(Flags->cpr1_size) << "\n";
OS << "CPR2 size: " << getMipsRegisterSize(Flags->cpr2_size) << "\n";
OS << "FP ABI: " << printEnum(Flags->fp_abi, makeArrayRef(ElfMipsFpABIType))
<< "\n";
OS << "ISA Extension: "
<< printEnum(Flags->isa_ext, makeArrayRef(ElfMipsISAExtType)) << "\n";
if (Flags->ases == 0)
OS << "ASEs: None\n";
else
// FIXME: Print each flag on a separate line.
OS << "ASEs: " << printFlags(Flags->ases, makeArrayRef(ElfMipsASEFlags))
<< "\n";
OS << "FLAGS 1: " << format_hex_no_prefix(Flags->flags1, 8, false) << "\n";
OS << "FLAGS 2: " << format_hex_no_prefix(Flags->flags2, 8, false) << "\n";
OS << "\n";
}
template <class ELFT> void LLVMStyle<ELFT>::printFileHeaders(const ELFO *Obj) {
const Elf_Ehdr *E = Obj->getHeader();
{
DictScope D(W, "ElfHeader");
{
DictScope D(W, "Ident");
W.printBinary("Magic", makeArrayRef(E->e_ident).slice(ELF::EI_MAG0, 4));
W.printEnum("Class", E->e_ident[ELF::EI_CLASS], makeArrayRef(ElfClass));
W.printEnum("DataEncoding", E->e_ident[ELF::EI_DATA],
makeArrayRef(ElfDataEncoding));
W.printNumber("FileVersion", E->e_ident[ELF::EI_VERSION]);
auto OSABI = makeArrayRef(ElfOSABI);
if (E->e_ident[ELF::EI_OSABI] >= ELF::ELFOSABI_FIRST_ARCH &&
E->e_ident[ELF::EI_OSABI] <= ELF::ELFOSABI_LAST_ARCH) {
switch (E->e_machine) {
case ELF::EM_AMDGPU:
OSABI = makeArrayRef(AMDGPUElfOSABI);
break;
case ELF::EM_ARM:
OSABI = makeArrayRef(ARMElfOSABI);
break;
case ELF::EM_TI_C6000:
OSABI = makeArrayRef(C6000ElfOSABI);
break;
}
}
W.printEnum("OS/ABI", E->e_ident[ELF::EI_OSABI], OSABI);
W.printNumber("ABIVersion", E->e_ident[ELF::EI_ABIVERSION]);
W.printBinary("Unused", makeArrayRef(E->e_ident).slice(ELF::EI_PAD));
}
W.printEnum("Type", E->e_type, makeArrayRef(ElfObjectFileType));
W.printEnum("Machine", E->e_machine, makeArrayRef(ElfMachineType));
W.printNumber("Version", E->e_version);
W.printHex("Entry", E->e_entry);
W.printHex("ProgramHeaderOffset", E->e_phoff);
W.printHex("SectionHeaderOffset", E->e_shoff);
if (E->e_machine == EM_MIPS)
W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderMipsFlags),
unsigned(ELF::EF_MIPS_ARCH), unsigned(ELF::EF_MIPS_ABI),
unsigned(ELF::EF_MIPS_MACH));
else if (E->e_machine == EM_AMDGPU)
W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderAMDGPUFlags),
unsigned(ELF::EF_AMDGPU_MACH));
else if (E->e_machine == EM_RISCV)
W.printFlags("Flags", E->e_flags, makeArrayRef(ElfHeaderRISCVFlags));
else
W.printFlags("Flags", E->e_flags);
W.printNumber("HeaderSize", E->e_ehsize);
W.printNumber("ProgramHeaderEntrySize", E->e_phentsize);
W.printNumber("ProgramHeaderCount", E->e_phnum);
W.printNumber("SectionHeaderEntrySize", E->e_shentsize);
W.printString("SectionHeaderCount",
getSectionHeadersNumString(Obj, this->FileName));
W.printString("StringTableSectionIndex",
getSectionHeaderTableIndexString(Obj, this->FileName));
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printGroupSections(const ELFO *Obj) {
DictScope Lists(W, "Groups");
std::vector<GroupSection> V = getGroups<ELFT>(Obj, this->FileName);
DenseMap<uint64_t, const GroupSection *> Map = mapSectionsToGroups(V);
for (const GroupSection &G : V) {
DictScope D(W, "Group");
W.printNumber("Name", G.Name, G.ShName);
W.printNumber("Index", G.Index);
W.printNumber("Link", G.Link);
W.printNumber("Info", G.Info);
W.printHex("Type", getGroupType(G.Type), G.Type);
W.startLine() << "Signature: " << G.Signature << "\n";
ListScope L(W, "Section(s) in group");
for (const GroupMember &GM : G.Members) {
const GroupSection *MainGroup = Map[GM.Index];
if (MainGroup != &G) {
W.flush();
errs() << "Error: " << GM.Name << " (" << GM.Index
<< ") in a group " + G.Name + " (" << G.Index
<< ") is already in a group " + MainGroup->Name + " ("
<< MainGroup->Index << ")\n";
errs().flush();
continue;
}
W.startLine() << GM.Name << " (" << GM.Index << ")\n";
}
}
if (V.empty())
W.startLine() << "There are no group sections in the file.\n";
}
template <class ELFT> void LLVMStyle<ELFT>::printRelocations(const ELFO *Obj) {
ListScope D(W, "Relocations");
int SectionNumber = -1;
for (const Elf_Shdr &Sec : unwrapOrError(this->FileName, Obj->sections())) {
++SectionNumber;
if (Sec.sh_type != ELF::SHT_REL && Sec.sh_type != ELF::SHT_RELA &&
Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_REL &&
Sec.sh_type != ELF::SHT_ANDROID_RELA &&
Sec.sh_type != ELF::SHT_ANDROID_RELR)
continue;
StringRef Name = unwrapOrError(this->FileName, Obj->getSectionName(&Sec));
W.startLine() << "Section (" << SectionNumber << ") " << Name << " {\n";
W.indent();
printRelocations(&Sec, Obj);
W.unindent();
W.startLine() << "}\n";
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printRelocations(const Elf_Shdr *Sec, const ELFO *Obj) {
const Elf_Shdr *SymTab =
unwrapOrError(this->FileName, Obj->getSection(Sec->sh_link));
unsigned SecNdx = Sec - &cantFail(Obj->sections()).front();
unsigned RelNdx = 0;
switch (Sec->sh_type) {
case ELF::SHT_REL:
for (const Elf_Rel &R : unwrapOrError(this->FileName, Obj->rels(Sec))) {
Elf_Rela Rela;
Rela.r_offset = R.r_offset;
Rela.r_info = R.r_info;
Rela.r_addend = 0;
printRelocation(Obj, SecNdx, Rela, ++RelNdx, SymTab);
}
break;
case ELF::SHT_RELA:
for (const Elf_Rela &R : unwrapOrError(this->FileName, Obj->relas(Sec)))
printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab);
break;
case ELF::SHT_RELR:
case ELF::SHT_ANDROID_RELR: {
Elf_Relr_Range Relrs = unwrapOrError(this->FileName, Obj->relrs(Sec));
if (opts::RawRelr) {
for (const Elf_Relr &R : Relrs)
W.startLine() << W.hex(R) << "\n";
} else {
std::vector<Elf_Rela> RelrRelas =
unwrapOrError(this->FileName, Obj->decode_relrs(Relrs));
for (const Elf_Rela &R : RelrRelas)
printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab);
}
break;
}
case ELF::SHT_ANDROID_REL:
case ELF::SHT_ANDROID_RELA:
for (const Elf_Rela &R :
unwrapOrError(this->FileName, Obj->android_relas(Sec)))
printRelocation(Obj, SecNdx, R, ++RelNdx, SymTab);
break;
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printRelocation(const ELFO *Obj, unsigned SecIndex,
Elf_Rela Rel, unsigned RelIndex,
const Elf_Shdr *SymTab) {
Expected<std::pair<const typename ELFT::Sym *, std::string>> Target =
this->dumper()->getRelocationTarget(SymTab, Rel);
if (!Target) {
this->reportUniqueWarning(createError(
"unable to print relocation " + Twine(RelIndex) + " in section " +
Twine(SecIndex) + ": " + toString(Target.takeError())));
return;
}
std::string TargetName = Target->second;
SmallString<32> RelocName;
Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName);
if (opts::ExpandRelocs) {
DictScope Group(W, "Relocation");
W.printHex("Offset", Rel.r_offset);
W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL()));
W.printNumber("Symbol", !TargetName.empty() ? TargetName : "-",
Rel.getSymbol(Obj->isMips64EL()));
W.printHex("Addend", Rel.r_addend);
} else {
raw_ostream &OS = W.startLine();
OS << W.hex(Rel.r_offset) << " " << RelocName << " "
<< (!TargetName.empty() ? TargetName : "-") << " " << W.hex(Rel.r_addend)
<< "\n";
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printSectionHeaders(const ELFO *Obj) {
ListScope SectionsD(W, "Sections");
int SectionIndex = -1;
ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections());
std::vector<EnumEntry<unsigned>> FlagsList =
getSectionFlagsForTarget(Obj->getHeader()->e_machine);
for (const Elf_Shdr &Sec : Sections) {
StringRef Name = "<?>";
if (Expected<StringRef> SecNameOrErr =
Obj->getSectionName(&Sec, this->dumper()->WarningHandler))
Name = *SecNameOrErr;
else
this->reportUniqueWarning(SecNameOrErr.takeError());
DictScope SectionD(W, "Section");
W.printNumber("Index", ++SectionIndex);
W.printNumber("Name", Name, Sec.sh_name);
W.printHex(
"Type",
object::getELFSectionTypeName(Obj->getHeader()->e_machine, Sec.sh_type),
Sec.sh_type);
W.printFlags("Flags", Sec.sh_flags, makeArrayRef(FlagsList));
W.printHex("Address", Sec.sh_addr);
W.printHex("Offset", Sec.sh_offset);
W.printNumber("Size", Sec.sh_size);
W.printNumber("Link", Sec.sh_link);
W.printNumber("Info", Sec.sh_info);
W.printNumber("AddressAlignment", Sec.sh_addralign);
W.printNumber("EntrySize", Sec.sh_entsize);
if (opts::SectionRelocations) {
ListScope D(W, "Relocations");
printRelocations(&Sec, Obj);
}
if (opts::SectionSymbols) {
ListScope D(W, "Symbols");
const Elf_Shdr *Symtab = this->dumper()->getDotSymtabSec();
StringRef StrTable =
unwrapOrError(this->FileName, Obj->getStringTableForSymtab(*Symtab));
for (const Elf_Sym &Sym :
unwrapOrError(this->FileName, Obj->symbols(Symtab))) {
const Elf_Shdr *SymSec = unwrapOrError(
this->FileName,
Obj->getSection(&Sym, Symtab, this->dumper()->getShndxTable()));
if (SymSec == &Sec)
printSymbol(
Obj, &Sym,
unwrapOrError(this->FileName, Obj->symbols(Symtab)).begin(),
StrTable, false, false);
}
}
if (opts::SectionData && Sec.sh_type != ELF::SHT_NOBITS) {
ArrayRef<uint8_t> Data =
unwrapOrError(this->FileName, Obj->getSectionContents(&Sec));
W.printBinaryBlock(
"SectionData",
StringRef(reinterpret_cast<const char *>(Data.data()), Data.size()));
}
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printSymbolSection(const Elf_Sym *Symbol,
const Elf_Sym *First) {
Expected<unsigned> SectionIndex =
this->dumper()->getSymbolSectionIndex(Symbol, First);
if (!SectionIndex) {
assert(Symbol->st_shndx == SHN_XINDEX &&
"getSymbolSectionIndex should only fail due to an invalid "
"SHT_SYMTAB_SHNDX table/reference");
this->reportUniqueWarning(SectionIndex.takeError());
W.printHex("Section", "Reserved", SHN_XINDEX);
return;
}
Expected<StringRef> SectionName =
this->dumper()->getSymbolSectionName(Symbol, *SectionIndex);
if (!SectionName) {
// Don't report an invalid section name if the section headers are missing.
// In such situations, all sections will be "invalid".
if (!this->dumper()->getElfObject()->sections().empty())
this->reportUniqueWarning(SectionName.takeError());
else
consumeError(SectionName.takeError());
W.printHex("Section", "<?>", *SectionIndex);
} else {
W.printHex("Section", *SectionName, *SectionIndex);
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printSymbol(const ELFO *Obj, const Elf_Sym *Symbol,
const Elf_Sym *First, StringRef StrTable,
bool IsDynamic,
bool /*NonVisibilityBitsUsed*/) {
std::string FullSymbolName =
this->dumper()->getFullSymbolName(Symbol, StrTable, IsDynamic);
unsigned char SymbolType = Symbol->getType();
DictScope D(W, "Symbol");
W.printNumber("Name", FullSymbolName, Symbol->st_name);
W.printHex("Value", Symbol->st_value);
W.printNumber("Size", Symbol->st_size);
W.printEnum("Binding", Symbol->getBinding(), makeArrayRef(ElfSymbolBindings));
if (Obj->getHeader()->e_machine == ELF::EM_AMDGPU &&
SymbolType >= ELF::STT_LOOS && SymbolType < ELF::STT_HIOS)
W.printEnum("Type", SymbolType, makeArrayRef(AMDGPUSymbolTypes));
else
W.printEnum("Type", SymbolType, makeArrayRef(ElfSymbolTypes));
if (Symbol->st_other == 0)
// Usually st_other flag is zero. Do not pollute the output
// by flags enumeration in that case.
W.printNumber("Other", 0);
else {
std::vector<EnumEntry<unsigned>> SymOtherFlags(std::begin(ElfSymOtherFlags),
std::end(ElfSymOtherFlags));
if (Obj->getHeader()->e_machine == EM_MIPS) {
// Someones in their infinite wisdom decided to make STO_MIPS_MIPS16
// flag overlapped with other ST_MIPS_xxx flags. So consider both
// cases separately.
if ((Symbol->st_other & STO_MIPS_MIPS16) == STO_MIPS_MIPS16)
SymOtherFlags.insert(SymOtherFlags.end(),
std::begin(ElfMips16SymOtherFlags),
std::end(ElfMips16SymOtherFlags));
else
SymOtherFlags.insert(SymOtherFlags.end(),
std::begin(ElfMipsSymOtherFlags),
std::end(ElfMipsSymOtherFlags));
}
W.printFlags("Other", Symbol->st_other, makeArrayRef(SymOtherFlags), 0x3u);
}
printSymbolSection(Symbol, First);
}
template <class ELFT>
void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj, bool PrintSymbols,
bool PrintDynamicSymbols) {
if (PrintSymbols)
printSymbols(Obj);
if (PrintDynamicSymbols)
printDynamicSymbols(Obj);
}
template <class ELFT> void LLVMStyle<ELFT>::printSymbols(const ELFO *Obj) {
ListScope Group(W, "Symbols");
this->dumper()->printSymbolsHelper(false);
}
template <class ELFT>
void LLVMStyle<ELFT>::printDynamicSymbols(const ELFO *Obj) {
ListScope Group(W, "DynamicSymbols");
this->dumper()->printSymbolsHelper(true);
}
template <class ELFT> void LLVMStyle<ELFT>::printDynamic(const ELFFile<ELFT> *Obj) {
Elf_Dyn_Range Table = this->dumper()->dynamic_table();
if (Table.empty())
return;
W.startLine() << "DynamicSection [ (" << Table.size() << " entries)\n";
size_t MaxTagSize = getMaxDynamicTagSize(Obj, Table);
// The "Name/Value" column should be indented from the "Type" column by N
// spaces, where N = MaxTagSize - length of "Type" (4) + trailing
// space (1) = -3.
W.startLine() << " Tag" << std::string(ELFT::Is64Bits ? 16 : 8, ' ')
<< "Type" << std::string(MaxTagSize - 3, ' ') << "Name/Value\n";
std::string ValueFmt = "%-" + std::to_string(MaxTagSize) + "s ";
for (auto Entry : Table) {
uintX_t Tag = Entry.getTag();
std::string Value = this->dumper()->getDynamicEntry(Tag, Entry.getVal());
W.startLine() << " " << format_hex(Tag, ELFT::Is64Bits ? 18 : 10, true)
<< " "
<< format(ValueFmt.c_str(),
Obj->getDynamicTagAsString(Tag).c_str())
<< Value << "\n";
}
W.startLine() << "]\n";
}
template <class ELFT>
void LLVMStyle<ELFT>::printDynamicRelocations(const ELFO *Obj) {
const DynRegionInfo &DynRelRegion = this->dumper()->getDynRelRegion();
const DynRegionInfo &DynRelaRegion = this->dumper()->getDynRelaRegion();
const DynRegionInfo &DynRelrRegion = this->dumper()->getDynRelrRegion();
const DynRegionInfo &DynPLTRelRegion = this->dumper()->getDynPLTRelRegion();
if (DynRelRegion.Size && DynRelaRegion.Size)
report_fatal_error("There are both REL and RELA dynamic relocations");
W.startLine() << "Dynamic Relocations {\n";
W.indent();
if (DynRelaRegion.Size > 0)
for (const Elf_Rela &Rela : this->dumper()->dyn_relas())
printDynamicRelocation(Obj, Rela);
else
for (const Elf_Rel &Rel : this->dumper()->dyn_rels()) {
Elf_Rela Rela;
Rela.r_offset = Rel.r_offset;
Rela.r_info = Rel.r_info;
Rela.r_addend = 0;
printDynamicRelocation(Obj, Rela);
}
if (DynRelrRegion.Size > 0) {
Elf_Relr_Range Relrs = this->dumper()->dyn_relrs();
std::vector<Elf_Rela> RelrRelas =
unwrapOrError(this->FileName, Obj->decode_relrs(Relrs));
for (const Elf_Rela &Rela : RelrRelas)
printDynamicRelocation(Obj, Rela);
}
if (DynPLTRelRegion.EntSize == sizeof(Elf_Rela))
for (const Elf_Rela &Rela : DynPLTRelRegion.getAsArrayRef<Elf_Rela>())
printDynamicRelocation(Obj, Rela);
else
for (const Elf_Rel &Rel : DynPLTRelRegion.getAsArrayRef<Elf_Rel>()) {
Elf_Rela Rela;
Rela.r_offset = Rel.r_offset;
Rela.r_info = Rel.r_info;
Rela.r_addend = 0;
printDynamicRelocation(Obj, Rela);
}
W.unindent();
W.startLine() << "}\n";
}
template <class ELFT>
void LLVMStyle<ELFT>::printDynamicRelocation(const ELFO *Obj, Elf_Rela Rel) {
SmallString<32> RelocName;
Obj->getRelocationTypeName(Rel.getType(Obj->isMips64EL()), RelocName);
std::string SymbolName =
getSymbolForReloc(Obj, this->FileName, this->dumper(), Rel).Name;
if (opts::ExpandRelocs) {
DictScope Group(W, "Relocation");
W.printHex("Offset", Rel.r_offset);
W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL()));
W.printString("Symbol", !SymbolName.empty() ? SymbolName : "-");
W.printHex("Addend", Rel.r_addend);
} else {
raw_ostream &OS = W.startLine();
OS << W.hex(Rel.r_offset) << " " << RelocName << " "
<< (!SymbolName.empty() ? SymbolName : "-") << " " << W.hex(Rel.r_addend)
<< "\n";
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printProgramHeaders(
const ELFO *Obj, bool PrintProgramHeaders,
cl::boolOrDefault PrintSectionMapping) {
if (PrintProgramHeaders)
printProgramHeaders(Obj);
if (PrintSectionMapping == cl::BOU_TRUE)
printSectionMapping(Obj);
}
template <class ELFT>
void LLVMStyle<ELFT>::printProgramHeaders(const ELFO *Obj) {
ListScope L(W, "ProgramHeaders");
for (const Elf_Phdr &Phdr :
unwrapOrError(this->FileName, Obj->program_headers())) {
DictScope P(W, "ProgramHeader");
W.printHex("Type",
getElfSegmentType(Obj->getHeader()->e_machine, Phdr.p_type),
Phdr.p_type);
W.printHex("Offset", Phdr.p_offset);
W.printHex("VirtualAddress", Phdr.p_vaddr);
W.printHex("PhysicalAddress", Phdr.p_paddr);
W.printNumber("FileSize", Phdr.p_filesz);
W.printNumber("MemSize", Phdr.p_memsz);
W.printFlags("Flags", Phdr.p_flags, makeArrayRef(ElfSegmentFlags));
W.printNumber("Alignment", Phdr.p_align);
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printVersionSymbolSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) {
ListScope SS(W, "VersionSymbols");
if (!Sec)
return;
StringRef StrTable;
ArrayRef<Elf_Sym> Syms;
Expected<ArrayRef<Elf_Versym>> VerTableOrErr =
this->dumper()->getVersionTable(Sec, &Syms, &StrTable);
if (!VerTableOrErr) {
this->reportUniqueWarning(VerTableOrErr.takeError());
return;
}
if (StrTable.empty() || Syms.empty() || Syms.size() != VerTableOrErr->size())
return;
for (size_t I = 0, E = Syms.size(); I < E; ++I) {
DictScope S(W, "Symbol");
W.printNumber("Version", (*VerTableOrErr)[I].vs_index & VERSYM_VERSION);
W.printString("Name", this->dumper()->getFullSymbolName(
&Syms[I], StrTable, /*IsDynamic=*/true));
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printVersionDefinitionSection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) {
ListScope SD(W, "VersionDefinitions");
if (!Sec)
return;
Expected<std::vector<VerDef>> V = this->dumper()->getVersionDefinitions(Sec);
if (!V) {
this->reportUniqueWarning(V.takeError());
return;
}
for (const VerDef &D : *V) {
DictScope Def(W, "Definition");
W.printNumber("Version", D.Version);
W.printFlags("Flags", D.Flags, makeArrayRef(SymVersionFlags));
W.printNumber("Index", D.Ndx);
W.printNumber("Hash", D.Hash);
W.printString("Name", D.Name.c_str());
W.printList(
"Predecessors", D.AuxV,
[](raw_ostream &OS, const VerdAux &Aux) { OS << Aux.Name.c_str(); });
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printVersionDependencySection(const ELFFile<ELFT> *Obj,
const Elf_Shdr *Sec) {
ListScope SD(W, "VersionRequirements");
if (!Sec)
return;
Expected<std::vector<VerNeed>> V =
this->dumper()->getVersionDependencies(Sec);
if (!V) {
this->reportUniqueWarning(V.takeError());
return;
}
for (const VerNeed &VN : *V) {
DictScope Entry(W, "Dependency");
W.printNumber("Version", VN.Version);
W.printNumber("Count", VN.Cnt);
W.printString("FileName", VN.File.c_str());
ListScope L(W, "Entries");
for (const VernAux &Aux : VN.AuxV) {
DictScope Entry(W, "Entry");
W.printNumber("Hash", Aux.Hash);
W.printFlags("Flags", Aux.Flags, makeArrayRef(SymVersionFlags));
W.printNumber("Index", Aux.Other);
W.printString("Name", Aux.Name.c_str());
}
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printHashHistograms(const ELFFile<ELFT> *Obj) {
W.startLine() << "Hash Histogram not implemented!\n";
}
template <class ELFT>
void LLVMStyle<ELFT>::printCGProfile(const ELFFile<ELFT> *Obj) {
ListScope L(W, "CGProfile");
if (!this->dumper()->getDotCGProfileSec())
return;
auto CGProfile = unwrapOrError(
this->FileName, Obj->template getSectionContentsAsArray<Elf_CGProfile>(
this->dumper()->getDotCGProfileSec()));
for (const Elf_CGProfile &CGPE : CGProfile) {
DictScope D(W, "CGProfileEntry");
W.printNumber(
"From",
unwrapOrError(this->FileName,
this->dumper()->getStaticSymbolName(CGPE.cgp_from)),
CGPE.cgp_from);
W.printNumber(
"To",
unwrapOrError(this->FileName,
this->dumper()->getStaticSymbolName(CGPE.cgp_to)),
CGPE.cgp_to);
W.printNumber("Weight", CGPE.cgp_weight);
}
}
static Expected<std::vector<uint64_t>> toULEB128Array(ArrayRef<uint8_t> Data) {
std::vector<uint64_t> Ret;
const uint8_t *Cur = Data.begin();
const uint8_t *End = Data.end();
while (Cur != End) {
unsigned Size;
const char *Err;
Ret.push_back(decodeULEB128(Cur, &Size, End, &Err));
if (Err)
return createError(Err);
Cur += Size;
}
return Ret;
}
template <class ELFT>
void LLVMStyle<ELFT>::printAddrsig(const ELFFile<ELFT> *Obj) {
ListScope L(W, "Addrsig");
if (!this->dumper()->getDotAddrsigSec())
return;
ArrayRef<uint8_t> Contents = unwrapOrError(
this->FileName,
Obj->getSectionContents(this->dumper()->getDotAddrsigSec()));
Expected<std::vector<uint64_t>> V = toULEB128Array(Contents);
if (!V) {
reportWarning(V.takeError(), this->FileName);
return;
}
for (uint64_t Sym : *V) {
Expected<std::string> NameOrErr = this->dumper()->getStaticSymbolName(Sym);
if (NameOrErr) {
W.printNumber("Sym", *NameOrErr, Sym);
continue;
}
reportWarning(NameOrErr.takeError(), this->FileName);
W.printNumber("Sym", "<?>", Sym);
}
}
template <typename ELFT>
static void printGNUNoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc,
ScopedPrinter &W) {
switch (NoteType) {
default:
return;
case ELF::NT_GNU_ABI_TAG: {
const GNUAbiTag &AbiTag = getGNUAbiTag<ELFT>(Desc);
if (!AbiTag.IsValid) {
W.printString("ABI", "<corrupt GNU_ABI_TAG>");
} else {
W.printString("OS", AbiTag.OSName);
W.printString("ABI", AbiTag.ABI);
}
break;
}
case ELF::NT_GNU_BUILD_ID: {
W.printString("Build ID", getGNUBuildId(Desc));
break;
}
case ELF::NT_GNU_GOLD_VERSION:
W.printString("Version", getGNUGoldVersion(Desc));
break;
case ELF::NT_GNU_PROPERTY_TYPE_0:
ListScope D(W, "Property");
for (const auto &Property : getGNUPropertyList<ELFT>(Desc))
W.printString(Property);
break;
}
}
static void printCoreNoteLLVMStyle(const CoreNote &Note, ScopedPrinter &W) {
W.printNumber("Page Size", Note.PageSize);
for (const CoreFileMapping &Mapping : Note.Mappings) {
ListScope D(W, "Mapping");
W.printHex("Start", Mapping.Start);
W.printHex("End", Mapping.End);
W.printHex("Offset", Mapping.Offset);
W.printString("Filename", Mapping.Filename);
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printNotes(const ELFFile<ELFT> *Obj) {
ListScope L(W, "Notes");
auto PrintHeader = [&](Optional<StringRef> SecName,
const typename ELFT::Off Offset,
const typename ELFT::Addr Size) {
W.printString("Name", SecName ? *SecName : "<?>");
W.printHex("Offset", Offset);
W.printHex("Size", Size);
};
auto ProcessNote = [&](const Elf_Note &Note) {
DictScope D2(W, "Note");
StringRef Name = Note.getName();
ArrayRef<uint8_t> Descriptor = Note.getDesc();
Elf_Word Type = Note.getType();
// Print the note owner/type.
W.printString("Owner", Name);
W.printHex("Data size", Descriptor.size());
if (Name == "GNU") {
W.printString("Type", getGNUNoteTypeName(Type));
} else if (Name == "FreeBSD") {
W.printString("Type", getFreeBSDNoteTypeName(Type));
} else if (Name == "AMD") {
W.printString("Type", getAMDNoteTypeName(Type));
} else if (Name == "AMDGPU") {
W.printString("Type", getAMDGPUNoteTypeName(Type));
} else {
StringRef NoteType = Obj->getHeader()->e_type == ELF::ET_CORE
? getCoreNoteTypeName(Type)
: getGenericNoteTypeName(Type);
if (!NoteType.empty())
W.printString("Type", NoteType);
else
W.printString("Type",
"Unknown (" + to_string(format_hex(Type, 10)) + ")");
}
// Print the description, or fallback to printing raw bytes for unknown
// owners.
if (Name == "GNU") {
printGNUNoteLLVMStyle<ELFT>(Type, Descriptor, W);
} else if (Name == "AMD") {
const AMDNote N = getAMDNote<ELFT>(Type, Descriptor);
if (!N.Type.empty())
W.printString(N.Type, N.Value);
} else if (Name == "AMDGPU") {
const AMDGPUNote N = getAMDGPUNote<ELFT>(Type, Descriptor);
if (!N.Type.empty())
W.printString(N.Type, N.Value);
} else if (Name == "CORE") {
if (Type == ELF::NT_FILE) {
DataExtractor DescExtractor(Descriptor,
ELFT::TargetEndianness == support::little,
sizeof(Elf_Addr));
Expected<CoreNote> Note = readCoreNote(DescExtractor);
if (Note)
printCoreNoteLLVMStyle(*Note, W);
else
reportWarning(Note.takeError(), this->FileName);
}
} else if (!Descriptor.empty()) {
W.printBinaryBlock("Description data", Descriptor);
}
};
ArrayRef<Elf_Shdr> Sections = unwrapOrError(this->FileName, Obj->sections());
if (Obj->getHeader()->e_type != ELF::ET_CORE && !Sections.empty()) {
for (const auto &S : Sections) {
if (S.sh_type != SHT_NOTE)
continue;
DictScope D(W, "NoteSection");
PrintHeader(expectedToOptional(Obj->getSectionName(&S)), S.sh_offset,
S.sh_size);
Error Err = Error::success();
for (auto Note : Obj->notes(S, Err))
ProcessNote(Note);
if (Err)
reportError(std::move(Err), this->FileName);
}
} else {
for (const auto &P :
unwrapOrError(this->FileName, Obj->program_headers())) {
if (P.p_type != PT_NOTE)
continue;
DictScope D(W, "NoteSection");
PrintHeader(/*SecName=*/None, P.p_offset, P.p_filesz);
Error Err = Error::success();
for (auto Note : Obj->notes(P, Err))
ProcessNote(Note);
if (Err)
reportError(std::move(Err), this->FileName);
}
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printELFLinkerOptions(const ELFFile<ELFT> *Obj) {
ListScope L(W, "LinkerOptions");
unsigned I = -1;
for (const Elf_Shdr &Shdr : unwrapOrError(this->FileName, Obj->sections())) {
++I;
if (Shdr.sh_type != ELF::SHT_LLVM_LINKER_OPTIONS)
continue;
ArrayRef<uint8_t> Contents =
unwrapOrError(this->FileName, Obj->getSectionContents(&Shdr));
if (Contents.empty())
continue;
if (Contents.back() != 0) {
reportWarning(createError("SHT_LLVM_LINKER_OPTIONS section at index " +
Twine(I) +
" is broken: the "
"content is not null-terminated"),
this->FileName);
continue;
}
SmallVector<StringRef, 16> Strings;
toStringRef(Contents.drop_back()).split(Strings, '\0');
if (Strings.size() % 2 != 0) {
reportWarning(
createError(
"SHT_LLVM_LINKER_OPTIONS section at index " + Twine(I) +
" is broken: an incomplete "
"key-value pair was found. The last possible key was: \"" +
Strings.back() + "\""),
this->FileName);
continue;
}
for (size_t I = 0; I < Strings.size(); I += 2)
W.printString(Strings[I], Strings[I + 1]);
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printDependentLibs(const ELFFile<ELFT> *Obj) {
ListScope L(W, "DependentLibs");
this->printDependentLibsHelper(
Obj, [](const Elf_Shdr &) {},
[this](StringRef Lib, uint64_t) { W.printString(Lib); });
}
template <class ELFT>
void LLVMStyle<ELFT>::printStackSizes(const ELFObjectFile<ELFT> *Obj) {
ListScope L(W, "StackSizes");
if (Obj->isRelocatableObject())
this->printRelocatableStackSizes(Obj, []() {});
else
this->printNonRelocatableStackSizes(Obj, []() {});
}
template <class ELFT>
void LLVMStyle<ELFT>::printStackSizeEntry(uint64_t Size, StringRef FuncName) {
DictScope D(W, "Entry");
W.printString("Function", FuncName);
W.printHex("Size", Size);
}
template <class ELFT>
void LLVMStyle<ELFT>::printMipsGOT(const MipsGOTParser<ELFT> &Parser) {
auto PrintEntry = [&](const Elf_Addr *E) {
W.printHex("Address", Parser.getGotAddress(E));
W.printNumber("Access", Parser.getGotOffset(E));
W.printHex("Initial", *E);
};
DictScope GS(W, Parser.IsStatic ? "Static GOT" : "Primary GOT");
W.printHex("Canonical gp value", Parser.getGp());
{
ListScope RS(W, "Reserved entries");
{
DictScope D(W, "Entry");
PrintEntry(Parser.getGotLazyResolver());
W.printString("Purpose", StringRef("Lazy resolver"));
}
if (Parser.getGotModulePointer()) {
DictScope D(W, "Entry");
PrintEntry(Parser.getGotModulePointer());
W.printString("Purpose", StringRef("Module pointer (GNU extension)"));
}
}
{
ListScope LS(W, "Local entries");
for (auto &E : Parser.getLocalEntries()) {
DictScope D(W, "Entry");
PrintEntry(&E);
}
}
if (Parser.IsStatic)
return;
{
ListScope GS(W, "Global entries");
for (auto &E : Parser.getGlobalEntries()) {
DictScope D(W, "Entry");
PrintEntry(&E);
const Elf_Sym *Sym = Parser.getGotSym(&E);
W.printHex("Value", Sym->st_value);
W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes));
printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin());
std::string SymName = this->dumper()->getFullSymbolName(
Sym, this->dumper()->getDynamicStringTable(), true);
W.printNumber("Name", SymName, Sym->st_name);
}
}
W.printNumber("Number of TLS and multi-GOT entries",
uint64_t(Parser.getOtherEntries().size()));
}
template <class ELFT>
void LLVMStyle<ELFT>::printMipsPLT(const MipsGOTParser<ELFT> &Parser) {
auto PrintEntry = [&](const Elf_Addr *E) {
W.printHex("Address", Parser.getPltAddress(E));
W.printHex("Initial", *E);
};
DictScope GS(W, "PLT GOT");
{
ListScope RS(W, "Reserved entries");
{
DictScope D(W, "Entry");
PrintEntry(Parser.getPltLazyResolver());
W.printString("Purpose", StringRef("PLT lazy resolver"));
}
if (auto E = Parser.getPltModulePointer()) {
DictScope D(W, "Entry");
PrintEntry(E);
W.printString("Purpose", StringRef("Module pointer"));
}
}
{
ListScope LS(W, "Entries");
for (auto &E : Parser.getPltEntries()) {
DictScope D(W, "Entry");
PrintEntry(&E);
const Elf_Sym *Sym = Parser.getPltSym(&E);
W.printHex("Value", Sym->st_value);
W.printEnum("Type", Sym->getType(), makeArrayRef(ElfSymbolTypes));
printSymbolSection(Sym, this->dumper()->dynamic_symbols().begin());
std::string SymName =
this->dumper()->getFullSymbolName(Sym, Parser.getPltStrTable(), true);
W.printNumber("Name", SymName, Sym->st_name);
}
}
}
template <class ELFT>
void LLVMStyle<ELFT>::printMipsABIFlags(const ELFObjectFile<ELFT> *ObjF) {
const ELFFile<ELFT> *Obj = ObjF->getELFFile();
const Elf_Shdr *Shdr =
findSectionByName(*Obj, ObjF->getFileName(), ".MIPS.abiflags");
if (!Shdr) {
W.startLine() << "There is no .MIPS.abiflags section in the file.\n";
return;
}
ArrayRef<uint8_t> Sec =
unwrapOrError(ObjF->getFileName(), Obj->getSectionContents(Shdr));
if (Sec.size() != sizeof(Elf_Mips_ABIFlags<ELFT>)) {
W.startLine() << "The .MIPS.abiflags section has a wrong size.\n";
return;
}
auto *Flags = reinterpret_cast<const Elf_Mips_ABIFlags<ELFT> *>(Sec.data());
raw_ostream &OS = W.getOStream();
DictScope GS(W, "MIPS ABI Flags");
W.printNumber("Version", Flags->version);
W.startLine() << "ISA: ";
if (Flags->isa_rev <= 1)
OS << format("MIPS%u", Flags->isa_level);
else
OS << format("MIPS%ur%u", Flags->isa_level, Flags->isa_rev);
OS << "\n";
W.printEnum("ISA Extension", Flags->isa_ext, makeArrayRef(ElfMipsISAExtType));
W.printFlags("ASEs", Flags->ases, makeArrayRef(ElfMipsASEFlags));
W.printEnum("FP ABI", Flags->fp_abi, makeArrayRef(ElfMipsFpABIType));
W.printNumber("GPR size", getMipsRegisterSize(Flags->gpr_size));
W.printNumber("CPR1 size", getMipsRegisterSize(Flags->cpr1_size));
W.printNumber("CPR2 size", getMipsRegisterSize(Flags->cpr2_size));
W.printFlags("Flags 1", Flags->flags1, makeArrayRef(ElfMipsFlags1));
W.printHex("Flags 2", Flags->flags2);
}
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