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llvm-mirror/tools/llvm-objdump/llvm-objdump.cpp
Fangrui Song 2b5c980652 [llvm-objdump] Dump inline relocations if the relocated section is specified with --section 
This fixes PR41886: llvm-objdump -d -r -j .text doesn't show inline relocations of .text

While here, switch to stable_sort() because we don't want to change the order of relocations applied to the same location. gABI says consecutive relocation records are composed together and their order matters. In practise it is difficult to see relocations applied to the same location not consecutive, we just have to keep the relative order of relocations with the same offset.

Reviewed By: grimar

Differential Revision: https://reviews.llvm.org/D62253

llvm-svn: 361395
2019-05-22 15:12:51 +00:00

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//===-- llvm-objdump.cpp - Object file dumping utility for llvm -----------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This program is a utility that works like binutils "objdump", that is, it
// dumps out a plethora of information about an object file depending on the
// flags.
//
// The flags and output of this program should be near identical to those of
// binutils objdump.
//
//===----------------------------------------------------------------------===//
#include "llvm-objdump.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/Triple.h"
#include "llvm/CodeGen/FaultMaps.h"
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
#include "llvm/DebugInfo/Symbolize/Symbolize.h"
#include "llvm/Demangle/Demangle.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/MC/MCDisassembler/MCRelocationInfo.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCInstrAnalysis.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/COFFImportFile.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/MachOUniversal.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/Wasm.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/GraphWriter.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/StringSaver.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cctype>
#include <cstring>
#include <system_error>
#include <unordered_map>
#include <utility>
using namespace llvm::object;
namespace llvm {
cl::OptionCategory ObjdumpCat("llvm-objdump Options");
// MachO specific
extern cl::OptionCategory MachOCat;
extern cl::opt<bool> Bind;
extern cl::opt<bool> DataInCode;
extern cl::opt<bool> DylibsUsed;
extern cl::opt<bool> DylibId;
extern cl::opt<bool> ExportsTrie;
extern cl::opt<bool> FirstPrivateHeader;
extern cl::opt<bool> IndirectSymbols;
extern cl::opt<bool> InfoPlist;
extern cl::opt<bool> LazyBind;
extern cl::opt<bool> LinkOptHints;
extern cl::opt<bool> ObjcMetaData;
extern cl::opt<bool> Rebase;
extern cl::opt<bool> UniversalHeaders;
extern cl::opt<bool> WeakBind;
static cl::opt<uint64_t> AdjustVMA(
"adjust-vma",
cl::desc("Increase the displayed address by the specified offset"),
cl::value_desc("offset"), cl::init(0), cl::cat(ObjdumpCat));
static cl::opt<bool>
AllHeaders("all-headers",
cl::desc("Display all available header information"),
cl::cat(ObjdumpCat));
static cl::alias AllHeadersShort("x", cl::desc("Alias for --all-headers"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(AllHeaders));
static cl::opt<std::string>
ArchName("arch-name",
cl::desc("Target arch to disassemble for, "
"see -version for available targets"),
cl::cat(ObjdumpCat));
cl::opt<bool> ArchiveHeaders("archive-headers",
cl::desc("Display archive header information"),
cl::cat(ObjdumpCat));
static cl::alias ArchiveHeadersShort("a",
cl::desc("Alias for --archive-headers"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(ArchiveHeaders));
cl::opt<bool> Demangle("demangle", cl::desc("Demangle symbols names"),
cl::init(false), cl::cat(ObjdumpCat));
static cl::alias DemangleShort("C", cl::desc("Alias for --demangle"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(Demangle));
cl::opt<bool> Disassemble(
"disassemble",
cl::desc("Display assembler mnemonics for the machine instructions"),
cl::cat(ObjdumpCat));
static cl::alias DisassembleShort("d", cl::desc("Alias for --disassemble"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(Disassemble));
cl::opt<bool> DisassembleAll(
"disassemble-all",
cl::desc("Display assembler mnemonics for the machine instructions"),
cl::cat(ObjdumpCat));
static cl::alias DisassembleAllShort("D",
cl::desc("Alias for --disassemble-all"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(DisassembleAll));
static cl::list<std::string>
DisassembleFunctions("disassemble-functions", cl::CommaSeparated,
cl::desc("List of functions to disassemble"),
cl::cat(ObjdumpCat));
static cl::opt<bool> DisassembleZeroes(
"disassemble-zeroes",
cl::desc("Do not skip blocks of zeroes when disassembling"),
cl::cat(ObjdumpCat));
static cl::alias
DisassembleZeroesShort("z", cl::desc("Alias for --disassemble-zeroes"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(DisassembleZeroes));
static cl::list<std::string>
DisassemblerOptions("disassembler-options",
cl::desc("Pass target specific disassembler options"),
cl::value_desc("options"), cl::CommaSeparated,
cl::cat(ObjdumpCat));
static cl::alias
DisassemblerOptionsShort("M", cl::desc("Alias for --disassembler-options"),
cl::NotHidden, cl::Grouping, cl::Prefix,
cl::CommaSeparated,
cl::aliasopt(DisassemblerOptions));
cl::opt<DIDumpType> DwarfDumpType(
"dwarf", cl::init(DIDT_Null), cl::desc("Dump of dwarf debug sections:"),
cl::values(clEnumValN(DIDT_DebugFrame, "frames", ".debug_frame")),
cl::cat(ObjdumpCat));
static cl::opt<bool> DynamicRelocations(
"dynamic-reloc",
cl::desc("Display the dynamic relocation entries in the file"),
cl::cat(ObjdumpCat));
static cl::alias DynamicRelocationShort("R",
cl::desc("Alias for --dynamic-reloc"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(DynamicRelocations));
static cl::opt<bool>
FaultMapSection("fault-map-section",
cl::desc("Display contents of faultmap section"),
cl::cat(ObjdumpCat));
static cl::opt<bool>
FileHeaders("file-headers",
cl::desc("Display the contents of the overall file header"),
cl::cat(ObjdumpCat));
static cl::alias FileHeadersShort("f", cl::desc("Alias for --file-headers"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(FileHeaders));
cl::opt<bool> SectionContents("full-contents",
cl::desc("Display the content of each section"),
cl::cat(ObjdumpCat));
static cl::alias SectionContentsShort("s",
cl::desc("Alias for --full-contents"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(SectionContents));
static cl::list<std::string> InputFilenames(cl::Positional,
cl::desc("<input object files>"),
cl::ZeroOrMore,
cl::cat(ObjdumpCat));
static cl::opt<bool>
PrintLines("line-numbers",
cl::desc("Display source line numbers with "
"disassembly. Implies disassemble object"),
cl::cat(ObjdumpCat));
static cl::alias PrintLinesShort("l", cl::desc("Alias for --line-numbers"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(PrintLines));
static cl::opt<bool> MachOOpt("macho",
cl::desc("Use MachO specific object file parser"),
cl::cat(ObjdumpCat));
static cl::alias MachOm("m", cl::desc("Alias for --macho"), cl::NotHidden,
cl::Grouping, cl::aliasopt(MachOOpt));
cl::opt<std::string>
MCPU("mcpu",
cl::desc("Target a specific cpu type (-mcpu=help for details)"),
cl::value_desc("cpu-name"), cl::init(""), cl::cat(ObjdumpCat));
cl::list<std::string> MAttrs("mattr", cl::CommaSeparated,
cl::desc("Target specific attributes"),
cl::value_desc("a1,+a2,-a3,..."),
cl::cat(ObjdumpCat));
cl::opt<bool> NoShowRawInsn("no-show-raw-insn",
cl::desc("When disassembling "
"instructions, do not print "
"the instruction bytes."),
cl::cat(ObjdumpCat));
cl::opt<bool> NoLeadingAddr("no-leading-addr",
cl::desc("Print no leading address"),
cl::cat(ObjdumpCat));
static cl::opt<bool> RawClangAST(
"raw-clang-ast",
cl::desc("Dump the raw binary contents of the clang AST section"),
cl::cat(ObjdumpCat));
cl::opt<bool>
Relocations("reloc", cl::desc("Display the relocation entries in the file"),
cl::cat(ObjdumpCat));
static cl::alias RelocationsShort("r", cl::desc("Alias for --reloc"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(Relocations));
cl::opt<bool> PrintImmHex("print-imm-hex",
cl::desc("Use hex format for immediate values"),
cl::cat(ObjdumpCat));
cl::opt<bool> PrivateHeaders("private-headers",
cl::desc("Display format specific file headers"),
cl::cat(ObjdumpCat));
static cl::alias PrivateHeadersShort("p",
cl::desc("Alias for --private-headers"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(PrivateHeaders));
cl::list<std::string>
FilterSections("section",
cl::desc("Operate on the specified sections only. "
"With -macho dump segment,section"),
cl::cat(ObjdumpCat));
static cl::alias FilterSectionsj("j", cl::desc("Alias for --section"),
cl::NotHidden, cl::Grouping, cl::Prefix,
cl::aliasopt(FilterSections));
cl::opt<bool> SectionHeaders("section-headers",
cl::desc("Display summaries of the "
"headers for each section."),
cl::cat(ObjdumpCat));
static cl::alias SectionHeadersShort("headers",
cl::desc("Alias for --section-headers"),
cl::NotHidden,
cl::aliasopt(SectionHeaders));
static cl::alias SectionHeadersShorter("h",
cl::desc("Alias for --section-headers"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(SectionHeaders));
static cl::opt<bool>
ShowLMA("show-lma",
cl::desc("Display LMA column when dumping ELF section headers"),
cl::cat(ObjdumpCat));
static cl::opt<bool> PrintSource(
"source",
cl::desc(
"Display source inlined with disassembly. Implies disassemble object"),
cl::cat(ObjdumpCat));
static cl::alias PrintSourceShort("S", cl::desc("Alias for -source"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(PrintSource));
static cl::opt<uint64_t>
StartAddress("start-address", cl::desc("Disassemble beginning at address"),
cl::value_desc("address"), cl::init(0), cl::cat(ObjdumpCat));
static cl::opt<uint64_t> StopAddress("stop-address",
cl::desc("Stop disassembly at address"),
cl::value_desc("address"),
cl::init(UINT64_MAX), cl::cat(ObjdumpCat));
cl::opt<bool> SymbolTable("syms", cl::desc("Display the symbol table"),
cl::cat(ObjdumpCat));
static cl::alias SymbolTableShort("t", cl::desc("Alias for --syms"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(SymbolTable));
cl::opt<std::string> TripleName("triple",
cl::desc("Target triple to disassemble for, "
"see -version for available targets"),
cl::cat(ObjdumpCat));
cl::opt<bool> UnwindInfo("unwind-info", cl::desc("Display unwind information"),
cl::cat(ObjdumpCat));
static cl::alias UnwindInfoShort("u", cl::desc("Alias for --unwind-info"),
cl::NotHidden, cl::Grouping,
cl::aliasopt(UnwindInfo));
static cl::opt<bool>
Wide("wide", cl::desc("Ignored for compatibility with GNU objdump"),
cl::cat(ObjdumpCat));
static cl::alias WideShort("w", cl::Grouping, cl::aliasopt(Wide));
static StringSet<> DisasmFuncsSet;
static StringRef ToolName;
typedef std::vector<std::tuple<uint64_t, StringRef, uint8_t>> SectionSymbolsTy;
static bool shouldKeep(object::SectionRef S) {
if (FilterSections.empty())
return true;
StringRef String;
std::error_code error = S.getName(String);
if (error)
return false;
return is_contained(FilterSections, String);
}
SectionFilter ToolSectionFilter(object::ObjectFile const &O) {
return SectionFilter([](object::SectionRef S) { return shouldKeep(S); }, O);
}
void error(std::error_code EC) {
if (!EC)
return;
WithColor::error(errs(), ToolName)
<< "reading file: " << EC.message() << ".\n";
errs().flush();
exit(1);
}
void error(Error E) {
if (!E)
return;
WithColor::error(errs(), ToolName) << toString(std::move(E));
exit(1);
}
LLVM_ATTRIBUTE_NORETURN void error(Twine Message) {
WithColor::error(errs(), ToolName) << Message << ".\n";
errs().flush();
exit(1);
}
void warn(StringRef Message) {
WithColor::warning(errs(), ToolName) << Message << ".\n";
errs().flush();
}
LLVM_ATTRIBUTE_NORETURN void report_error(StringRef File, Twine Message) {
WithColor::error(errs(), ToolName)
<< "'" << File << "': " << Message << ".\n";
exit(1);
}
LLVM_ATTRIBUTE_NORETURN void report_error(Error E, StringRef File) {
assert(E);
std::string Buf;
raw_string_ostream OS(Buf);
logAllUnhandledErrors(std::move(E), OS);
OS.flush();
WithColor::error(errs(), ToolName) << "'" << File << "': " << Buf;
exit(1);
}
LLVM_ATTRIBUTE_NORETURN void report_error(Error E, StringRef ArchiveName,
StringRef FileName,
StringRef ArchitectureName) {
assert(E);
WithColor::error(errs(), ToolName);
if (ArchiveName != "")
errs() << ArchiveName << "(" << FileName << ")";
else
errs() << "'" << FileName << "'";
if (!ArchitectureName.empty())
errs() << " (for architecture " << ArchitectureName << ")";
std::string Buf;
raw_string_ostream OS(Buf);
logAllUnhandledErrors(std::move(E), OS);
OS.flush();
errs() << ": " << Buf;
exit(1);
}
LLVM_ATTRIBUTE_NORETURN void report_error(Error E, StringRef ArchiveName,
const object::Archive::Child &C,
StringRef ArchitectureName) {
Expected<StringRef> NameOrErr = C.getName();
// TODO: if we have a error getting the name then it would be nice to print
// the index of which archive member this is and or its offset in the
// archive instead of "???" as the name.
if (!NameOrErr) {
consumeError(NameOrErr.takeError());
report_error(std::move(E), ArchiveName, "???", ArchitectureName);
} else
report_error(std::move(E), ArchiveName, NameOrErr.get(), ArchitectureName);
}
static const Target *getTarget(const ObjectFile *Obj = nullptr) {
// Figure out the target triple.
Triple TheTriple("unknown-unknown-unknown");
if (TripleName.empty()) {
if (Obj)
TheTriple = Obj->makeTriple();
} else {
TheTriple.setTriple(Triple::normalize(TripleName));
// Use the triple, but also try to combine with ARM build attributes.
if (Obj) {
auto Arch = Obj->getArch();
if (Arch == Triple::arm || Arch == Triple::armeb)
Obj->setARMSubArch(TheTriple);
}
}
// Get the target specific parser.
std::string Error;
const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple,
Error);
if (!TheTarget) {
if (Obj)
report_error(Obj->getFileName(), "can't find target: " + Error);
else
error("can't find target: " + Error);
}
// Update the triple name and return the found target.
TripleName = TheTriple.getTriple();
return TheTarget;
}
bool isRelocAddressLess(RelocationRef A, RelocationRef B) {
return A.getOffset() < B.getOffset();
}
static Error getRelocationValueString(const RelocationRef &Rel,
SmallVectorImpl<char> &Result) {
const ObjectFile *Obj = Rel.getObject();
if (auto *ELF = dyn_cast<ELFObjectFileBase>(Obj))
return getELFRelocationValueString(ELF, Rel, Result);
if (auto *COFF = dyn_cast<COFFObjectFile>(Obj))
return getCOFFRelocationValueString(COFF, Rel, Result);
if (auto *Wasm = dyn_cast<WasmObjectFile>(Obj))
return getWasmRelocationValueString(Wasm, Rel, Result);
if (auto *MachO = dyn_cast<MachOObjectFile>(Obj))
return getMachORelocationValueString(MachO, Rel, Result);
llvm_unreachable("unknown object file format");
}
/// Indicates whether this relocation should hidden when listing
/// relocations, usually because it is the trailing part of a multipart
/// relocation that will be printed as part of the leading relocation.
static bool getHidden(RelocationRef RelRef) {
auto *MachO = dyn_cast<MachOObjectFile>(RelRef.getObject());
if (!MachO)
return false;
unsigned Arch = MachO->getArch();
DataRefImpl Rel = RelRef.getRawDataRefImpl();
uint64_t Type = MachO->getRelocationType(Rel);
// On arches that use the generic relocations, GENERIC_RELOC_PAIR
// is always hidden.
if (Arch == Triple::x86 || Arch == Triple::arm || Arch == Triple::ppc)
return Type == MachO::GENERIC_RELOC_PAIR;
if (Arch == Triple::x86_64) {
// On x86_64, X86_64_RELOC_UNSIGNED is hidden only when it follows
// an X86_64_RELOC_SUBTRACTOR.
if (Type == MachO::X86_64_RELOC_UNSIGNED && Rel.d.a > 0) {
DataRefImpl RelPrev = Rel;
RelPrev.d.a--;
uint64_t PrevType = MachO->getRelocationType(RelPrev);
if (PrevType == MachO::X86_64_RELOC_SUBTRACTOR)
return true;
}
}
return false;
}
namespace {
class SourcePrinter {
protected:
DILineInfo OldLineInfo;
const ObjectFile *Obj = nullptr;
std::unique_ptr<symbolize::LLVMSymbolizer> Symbolizer;
// File name to file contents of source
std::unordered_map<std::string, std::unique_ptr<MemoryBuffer>> SourceCache;
// Mark the line endings of the cached source
std::unordered_map<std::string, std::vector<StringRef>> LineCache;
private:
bool cacheSource(const DILineInfo& LineInfoFile);
public:
SourcePrinter() = default;
SourcePrinter(const ObjectFile *Obj, StringRef DefaultArch) : Obj(Obj) {
symbolize::LLVMSymbolizer::Options SymbolizerOpts(
DILineInfoSpecifier::FunctionNameKind::None, true, false, false,
DefaultArch);
Symbolizer.reset(new symbolize::LLVMSymbolizer(SymbolizerOpts));
}
virtual ~SourcePrinter() = default;
virtual void printSourceLine(raw_ostream &OS,
object::SectionedAddress Address,
StringRef Delimiter = "; ");
};
bool SourcePrinter::cacheSource(const DILineInfo &LineInfo) {
std::unique_ptr<MemoryBuffer> Buffer;
if (LineInfo.Source) {
Buffer = MemoryBuffer::getMemBuffer(*LineInfo.Source);
} else {
auto BufferOrError = MemoryBuffer::getFile(LineInfo.FileName);
if (!BufferOrError)
return false;
Buffer = std::move(*BufferOrError);
}
// Chomp the file to get lines
const char *BufferStart = Buffer->getBufferStart(),
*BufferEnd = Buffer->getBufferEnd();
std::vector<StringRef> &Lines = LineCache[LineInfo.FileName];
const char *Start = BufferStart;
for (const char *I = BufferStart; I != BufferEnd; ++I)
if (*I == '\n') {
Lines.emplace_back(Start, I - Start - (BufferStart < I && I[-1] == '\r'));
Start = I + 1;
}
if (Start < BufferEnd)
Lines.emplace_back(Start, BufferEnd - Start);
SourceCache[LineInfo.FileName] = std::move(Buffer);
return true;
}
void SourcePrinter::printSourceLine(raw_ostream &OS,
object::SectionedAddress Address,
StringRef Delimiter) {
if (!Symbolizer)
return;
DILineInfo LineInfo = DILineInfo();
auto ExpectedLineInfo =
Symbolizer->symbolizeCode(Obj->getFileName(), Address);
if (!ExpectedLineInfo)
consumeError(ExpectedLineInfo.takeError());
else
LineInfo = *ExpectedLineInfo;
if ((LineInfo.FileName == "<invalid>") || OldLineInfo.Line == LineInfo.Line ||
LineInfo.Line == 0)
return;
if (PrintLines)
OS << Delimiter << LineInfo.FileName << ":" << LineInfo.Line << "\n";
if (PrintSource) {
if (SourceCache.find(LineInfo.FileName) == SourceCache.end())
if (!cacheSource(LineInfo))
return;
auto LineBuffer = LineCache.find(LineInfo.FileName);
if (LineBuffer != LineCache.end()) {
if (LineInfo.Line > LineBuffer->second.size())
return;
// Vector begins at 0, line numbers are non-zero
OS << Delimiter << LineBuffer->second[LineInfo.Line - 1] << '\n';
}
}
OldLineInfo = LineInfo;
}
static bool isArmElf(const ObjectFile *Obj) {
return (Obj->isELF() &&
(Obj->getArch() == Triple::aarch64 ||
Obj->getArch() == Triple::aarch64_be ||
Obj->getArch() == Triple::arm || Obj->getArch() == Triple::armeb ||
Obj->getArch() == Triple::thumb ||
Obj->getArch() == Triple::thumbeb));
}
static void printRelocation(const RelocationRef &Rel, uint64_t Address,
uint8_t AddrSize) {
StringRef Fmt =
AddrSize > 4 ? "\t\t%016" PRIx64 ": " : "\t\t\t%08" PRIx64 ": ";
SmallString<16> Name;
SmallString<32> Val;
Rel.getTypeName(Name);
error(getRelocationValueString(Rel, Val));
outs() << format(Fmt.data(), Address) << Name << "\t" << Val << "\n";
}
class PrettyPrinter {
public:
virtual ~PrettyPrinter() = default;
virtual void printInst(MCInstPrinter &IP, const MCInst *MI,
ArrayRef<uint8_t> Bytes,
object::SectionedAddress Address, raw_ostream &OS,
StringRef Annot, MCSubtargetInfo const &STI,
SourcePrinter *SP,
std::vector<RelocationRef> *Rels = nullptr) {
if (SP && (PrintSource || PrintLines))
SP->printSourceLine(OS, Address);
{
formatted_raw_ostream FOS(OS);
if (!NoLeadingAddr)
FOS << format("%8" PRIx64 ":", Address.Address);
if (!NoShowRawInsn) {
FOS << ' ';
dumpBytes(Bytes, FOS);
}
FOS.flush();
// The output of printInst starts with a tab. Print some spaces so that
// the tab has 1 column and advances to the target tab stop.
unsigned TabStop = NoShowRawInsn ? 16 : 40;
unsigned Column = FOS.getColumn();
FOS.indent(Column < TabStop - 1 ? TabStop - 1 - Column : 7 - Column % 8);
// The dtor calls flush() to ensure the indent comes before printInst().
}
if (MI)
IP.printInst(MI, OS, "", STI);
else
OS << "\t<unknown>";
}
};
PrettyPrinter PrettyPrinterInst;
class HexagonPrettyPrinter : public PrettyPrinter {
public:
void printLead(ArrayRef<uint8_t> Bytes, uint64_t Address,
raw_ostream &OS) {
uint32_t opcode =
(Bytes[3] << 24) | (Bytes[2] << 16) | (Bytes[1] << 8) | Bytes[0];
if (!NoLeadingAddr)
OS << format("%8" PRIx64 ":", Address);
if (!NoShowRawInsn) {
OS << "\t";
dumpBytes(Bytes.slice(0, 4), OS);
OS << format("\t%08" PRIx32, opcode);
}
}
void printInst(MCInstPrinter &IP, const MCInst *MI, ArrayRef<uint8_t> Bytes,
object::SectionedAddress Address, raw_ostream &OS,
StringRef Annot, MCSubtargetInfo const &STI, SourcePrinter *SP,
std::vector<RelocationRef> *Rels) override {
if (SP && (PrintSource || PrintLines))
SP->printSourceLine(OS, Address, "");
if (!MI) {
printLead(Bytes, Address.Address, OS);
OS << " <unknown>";
return;
}
std::string Buffer;
{
raw_string_ostream TempStream(Buffer);
IP.printInst(MI, TempStream, "", STI);
}
StringRef Contents(Buffer);
// Split off bundle attributes
auto PacketBundle = Contents.rsplit('\n');
// Split off first instruction from the rest
auto HeadTail = PacketBundle.first.split('\n');
auto Preamble = " { ";
auto Separator = "";
// Hexagon's packets require relocations to be inline rather than
// clustered at the end of the packet.
std::vector<RelocationRef>::const_iterator RelCur = Rels->begin();
std::vector<RelocationRef>::const_iterator RelEnd = Rels->end();
auto PrintReloc = [&]() -> void {
while ((RelCur != RelEnd) && (RelCur->getOffset() <= Address.Address)) {
if (RelCur->getOffset() == Address.Address) {
printRelocation(*RelCur, Address.Address, 4);
return;
}
++RelCur;
}
};
while (!HeadTail.first.empty()) {
OS << Separator;
Separator = "\n";
if (SP && (PrintSource || PrintLines))
SP->printSourceLine(OS, Address, "");
printLead(Bytes, Address.Address, OS);
OS << Preamble;
Preamble = " ";
StringRef Inst;
auto Duplex = HeadTail.first.split('\v');
if (!Duplex.second.empty()) {
OS << Duplex.first;
OS << "; ";
Inst = Duplex.second;
}
else
Inst = HeadTail.first;
OS << Inst;
HeadTail = HeadTail.second.split('\n');
if (HeadTail.first.empty())
OS << " } " << PacketBundle.second;
PrintReloc();
Bytes = Bytes.slice(4);
Address.Address += 4;
}
}
};
HexagonPrettyPrinter HexagonPrettyPrinterInst;
class AMDGCNPrettyPrinter : public PrettyPrinter {
public:
void printInst(MCInstPrinter &IP, const MCInst *MI, ArrayRef<uint8_t> Bytes,
object::SectionedAddress Address, raw_ostream &OS,
StringRef Annot, MCSubtargetInfo const &STI, SourcePrinter *SP,
std::vector<RelocationRef> *Rels) override {
if (SP && (PrintSource || PrintLines))
SP->printSourceLine(OS, Address);
typedef support::ulittle32_t U32;
if (MI) {
SmallString<40> InstStr;
raw_svector_ostream IS(InstStr);
IP.printInst(MI, IS, "", STI);
OS << left_justify(IS.str(), 60);
} else {
// an unrecognized encoding - this is probably data so represent it
// using the .long directive, or .byte directive if fewer than 4 bytes
// remaining
if (Bytes.size() >= 4) {
OS << format("\t.long 0x%08" PRIx32 " ",
static_cast<uint32_t>(*reinterpret_cast<const U32*>(Bytes.data())));
OS.indent(42);
} else {
OS << format("\t.byte 0x%02" PRIx8, Bytes[0]);
for (unsigned int i = 1; i < Bytes.size(); i++)
OS << format(", 0x%02" PRIx8, Bytes[i]);
OS.indent(55 - (6 * Bytes.size()));
}
}
OS << format("// %012" PRIX64 ": ", Address.Address);
if (Bytes.size() >=4) {
for (auto D : makeArrayRef(reinterpret_cast<const U32*>(Bytes.data()),
Bytes.size() / sizeof(U32)))
// D should be explicitly casted to uint32_t here as it is passed
// by format to snprintf as vararg.
OS << format("%08" PRIX32 " ", static_cast<uint32_t>(D));
} else {
for (unsigned int i = 0; i < Bytes.size(); i++)
OS << format("%02" PRIX8 " ", Bytes[i]);
}
if (!Annot.empty())
OS << "// " << Annot;
}
};
AMDGCNPrettyPrinter AMDGCNPrettyPrinterInst;
class BPFPrettyPrinter : public PrettyPrinter {
public:
void printInst(MCInstPrinter &IP, const MCInst *MI, ArrayRef<uint8_t> Bytes,
object::SectionedAddress Address, raw_ostream &OS,
StringRef Annot, MCSubtargetInfo const &STI, SourcePrinter *SP,
std::vector<RelocationRef> *Rels) override {
if (SP && (PrintSource || PrintLines))
SP->printSourceLine(OS, Address);
if (!NoLeadingAddr)
OS << format("%8" PRId64 ":", Address.Address / 8);
if (!NoShowRawInsn) {
OS << "\t";
dumpBytes(Bytes, OS);
}
if (MI)
IP.printInst(MI, OS, "", STI);
else
OS << "\t<unknown>";
}
};
BPFPrettyPrinter BPFPrettyPrinterInst;
PrettyPrinter &selectPrettyPrinter(Triple const &Triple) {
switch(Triple.getArch()) {
default:
return PrettyPrinterInst;
case Triple::hexagon:
return HexagonPrettyPrinterInst;
case Triple::amdgcn:
return AMDGCNPrettyPrinterInst;
case Triple::bpfel:
case Triple::bpfeb:
return BPFPrettyPrinterInst;
}
}
}
static uint8_t getElfSymbolType(const ObjectFile *Obj, const SymbolRef &Sym) {
assert(Obj->isELF());
if (auto *Elf32LEObj = dyn_cast<ELF32LEObjectFile>(Obj))
return Elf32LEObj->getSymbol(Sym.getRawDataRefImpl())->getType();
if (auto *Elf64LEObj = dyn_cast<ELF64LEObjectFile>(Obj))
return Elf64LEObj->getSymbol(Sym.getRawDataRefImpl())->getType();
if (auto *Elf32BEObj = dyn_cast<ELF32BEObjectFile>(Obj))
return Elf32BEObj->getSymbol(Sym.getRawDataRefImpl())->getType();
if (auto *Elf64BEObj = cast<ELF64BEObjectFile>(Obj))
return Elf64BEObj->getSymbol(Sym.getRawDataRefImpl())->getType();
llvm_unreachable("Unsupported binary format");
}
template <class ELFT> static void
addDynamicElfSymbols(const ELFObjectFile<ELFT> *Obj,
std::map<SectionRef, SectionSymbolsTy> &AllSymbols) {
for (auto Symbol : Obj->getDynamicSymbolIterators()) {
uint8_t SymbolType = Symbol.getELFType();
if (SymbolType != ELF::STT_FUNC || Symbol.getSize() == 0)
continue;
uint64_t Address = unwrapOrError(Symbol.getAddress(), Obj->getFileName());
StringRef Name = unwrapOrError(Symbol.getName(), Obj->getFileName());
if (Name.empty())
continue;
section_iterator SecI =
unwrapOrError(Symbol.getSection(), Obj->getFileName());
if (SecI == Obj->section_end())
continue;
AllSymbols[*SecI].emplace_back(Address, Name, SymbolType);
}
}
static void
addDynamicElfSymbols(const ObjectFile *Obj,
std::map<SectionRef, SectionSymbolsTy> &AllSymbols) {
assert(Obj->isELF());
if (auto *Elf32LEObj = dyn_cast<ELF32LEObjectFile>(Obj))
addDynamicElfSymbols(Elf32LEObj, AllSymbols);
else if (auto *Elf64LEObj = dyn_cast<ELF64LEObjectFile>(Obj))
addDynamicElfSymbols(Elf64LEObj, AllSymbols);
else if (auto *Elf32BEObj = dyn_cast<ELF32BEObjectFile>(Obj))
addDynamicElfSymbols(Elf32BEObj, AllSymbols);
else if (auto *Elf64BEObj = cast<ELF64BEObjectFile>(Obj))
addDynamicElfSymbols(Elf64BEObj, AllSymbols);
else
llvm_unreachable("Unsupported binary format");
}
static void addPltEntries(const ObjectFile *Obj,
std::map<SectionRef, SectionSymbolsTy> &AllSymbols,
StringSaver &Saver) {
Optional<SectionRef> Plt = None;
for (const SectionRef &Section : Obj->sections()) {
StringRef Name;
if (Section.getName(Name))
continue;
if (Name == ".plt")
Plt = Section;
}
if (!Plt)
return;
if (auto *ElfObj = dyn_cast<ELFObjectFileBase>(Obj)) {
for (auto PltEntry : ElfObj->getPltAddresses()) {
SymbolRef Symbol(PltEntry.first, ElfObj);
uint8_t SymbolType = getElfSymbolType(Obj, Symbol);
StringRef Name = unwrapOrError(Symbol.getName(), Obj->getFileName());
if (!Name.empty())
AllSymbols[*Plt].emplace_back(
PltEntry.second, Saver.save((Name + "@plt").str()), SymbolType);
}
}
}
// Normally the disassembly output will skip blocks of zeroes. This function
// returns the number of zero bytes that can be skipped when dumping the
// disassembly of the instructions in Buf.
static size_t countSkippableZeroBytes(ArrayRef<uint8_t> Buf) {
// Find the number of leading zeroes.
size_t N = 0;
while (N < Buf.size() && !Buf[N])
++N;
// We may want to skip blocks of zero bytes, but unless we see
// at least 8 of them in a row.
if (N < 8)
return 0;
// We skip zeroes in multiples of 4 because do not want to truncate an
// instruction if it starts with a zero byte.
return N & ~0x3;
}
// Returns a map from sections to their relocations.
static std::map<SectionRef, std::vector<RelocationRef>>
getRelocsMap(object::ObjectFile const &Obj) {
std::map<SectionRef, std::vector<RelocationRef>> Ret;
for (SectionRef Sec : Obj.sections()) {
section_iterator Relocated = Sec.getRelocatedSection();
if (Relocated == Obj.section_end() || !shouldKeep(*Relocated))
continue;
std::vector<RelocationRef> &V = Ret[*Relocated];
for (const RelocationRef &R : Sec.relocations())
V.push_back(R);
// Sort relocations by address.
llvm::stable_sort(V, isRelocAddressLess);
}
return Ret;
}
// Used for --adjust-vma to check if address should be adjusted by the
// specified value for a given section.
// For ELF we do not adjust non-allocatable sections like debug ones,
// because they are not loadable.
// TODO: implement for other file formats.
static bool shouldAdjustVA(const SectionRef &Section) {
const ObjectFile *Obj = Section.getObject();
if (isa<object::ELFObjectFileBase>(Obj))
return ELFSectionRef(Section).getFlags() & ELF::SHF_ALLOC;
return false;
}
static uint64_t
dumpARMELFData(uint64_t SectionAddr, uint64_t Index, uint64_t End,
const ObjectFile *Obj, ArrayRef<uint8_t> Bytes,
const std::vector<uint64_t> &TextMappingSymsAddr) {
support::endianness Endian =
Obj->isLittleEndian() ? support::little : support::big;
while (Index < End) {
outs() << format("%8" PRIx64 ":", SectionAddr + Index);
outs() << "\t";
if (Index + 4 <= End) {
dumpBytes(Bytes.slice(Index, 4), outs());
outs() << "\t.word\t"
<< format_hex(
support::endian::read32(Bytes.data() + Index, Endian), 10);
Index += 4;
} else if (Index + 2 <= End) {
dumpBytes(Bytes.slice(Index, 2), outs());
outs() << "\t\t.short\t"
<< format_hex(
support::endian::read16(Bytes.data() + Index, Endian), 6);
Index += 2;
} else {
dumpBytes(Bytes.slice(Index, 1), outs());
outs() << "\t\t.byte\t" << format_hex(Bytes[0], 4);
++Index;
}
outs() << "\n";
if (std::binary_search(TextMappingSymsAddr.begin(),
TextMappingSymsAddr.end(), Index))
break;
}
return Index;
}
static void dumpELFData(uint64_t SectionAddr, uint64_t Index, uint64_t End,
ArrayRef<uint8_t> Bytes) {
// print out data up to 8 bytes at a time in hex and ascii
uint8_t AsciiData[9] = {'\0'};
uint8_t Byte;
int NumBytes = 0;
for (; Index < End; ++Index) {
if (NumBytes == 0) {
outs() << format("%8" PRIx64 ":", SectionAddr + Index);
outs() << "\t";
}
Byte = Bytes.slice(Index)[0];
outs() << format(" %02x", Byte);
AsciiData[NumBytes] = isPrint(Byte) ? Byte : '.';
uint8_t IndentOffset = 0;
NumBytes++;
if (Index == End - 1 || NumBytes > 8) {
// Indent the space for less than 8 bytes data.
// 2 spaces for byte and one for space between bytes
IndentOffset = 3 * (8 - NumBytes);
for (int Excess = NumBytes; Excess < 8; Excess++)
AsciiData[Excess] = '\0';
NumBytes = 8;
}
if (NumBytes == 8) {
AsciiData[8] = '\0';
outs() << std::string(IndentOffset, ' ') << " ";
outs() << reinterpret_cast<char *>(AsciiData);
outs() << '\n';
NumBytes = 0;
}
}
}
static void disassembleObject(const Target *TheTarget, const ObjectFile *Obj,
MCContext &Ctx, MCDisassembler *DisAsm,
const MCInstrAnalysis *MIA, MCInstPrinter *IP,
const MCSubtargetInfo *STI, PrettyPrinter &PIP,
SourcePrinter &SP, bool InlineRelocs) {
std::map<SectionRef, std::vector<RelocationRef>> RelocMap;
if (InlineRelocs)
RelocMap = getRelocsMap(*Obj);
// Create a mapping from virtual address to symbol name. This is used to
// pretty print the symbols while disassembling.
std::map<SectionRef, SectionSymbolsTy> AllSymbols;
SectionSymbolsTy AbsoluteSymbols;
const StringRef FileName = Obj->getFileName();
for (const SymbolRef &Symbol : Obj->symbols()) {
uint64_t Address = unwrapOrError(Symbol.getAddress(), FileName);
StringRef Name = unwrapOrError(Symbol.getName(), FileName);
if (Name.empty())
continue;
uint8_t SymbolType = ELF::STT_NOTYPE;
if (Obj->isELF()) {
SymbolType = getElfSymbolType(Obj, Symbol);
if (SymbolType == ELF::STT_SECTION)
continue;
}
section_iterator SecI = unwrapOrError(Symbol.getSection(), FileName);
if (SecI != Obj->section_end())
AllSymbols[*SecI].emplace_back(Address, Name, SymbolType);
else
AbsoluteSymbols.emplace_back(Address, Name, SymbolType);
}
if (AllSymbols.empty() && Obj->isELF())
addDynamicElfSymbols(Obj, AllSymbols);
BumpPtrAllocator A;
StringSaver Saver(A);
addPltEntries(Obj, AllSymbols, Saver);
// Create a mapping from virtual address to section.
std::vector<std::pair<uint64_t, SectionRef>> SectionAddresses;
for (SectionRef Sec : Obj->sections())
SectionAddresses.emplace_back(Sec.getAddress(), Sec);
array_pod_sort(SectionAddresses.begin(), SectionAddresses.end());
// Linked executables (.exe and .dll files) typically don't include a real
// symbol table but they might contain an export table.
if (const auto *COFFObj = dyn_cast<COFFObjectFile>(Obj)) {
for (const auto &ExportEntry : COFFObj->export_directories()) {
StringRef Name;
error(ExportEntry.getSymbolName(Name));
if (Name.empty())
continue;
uint32_t RVA;
error(ExportEntry.getExportRVA(RVA));
uint64_t VA = COFFObj->getImageBase() + RVA;
auto Sec = llvm::bsearch(
SectionAddresses, [VA](const std::pair<uint64_t, SectionRef> &RHS) {
return VA < RHS.first;
});
if (Sec != SectionAddresses.begin()) {
--Sec;
AllSymbols[Sec->second].emplace_back(VA, Name, ELF::STT_NOTYPE);
} else
AbsoluteSymbols.emplace_back(VA, Name, ELF::STT_NOTYPE);
}
}
// Sort all the symbols, this allows us to use a simple binary search to find
// a symbol near an address.
for (std::pair<const SectionRef, SectionSymbolsTy> &SecSyms : AllSymbols)
array_pod_sort(SecSyms.second.begin(), SecSyms.second.end());
array_pod_sort(AbsoluteSymbols.begin(), AbsoluteSymbols.end());
for (const SectionRef &Section : ToolSectionFilter(*Obj)) {
if (!DisassembleAll && (!Section.isText() || Section.isVirtual()))
continue;
uint64_t SectionAddr = Section.getAddress();
uint64_t SectSize = Section.getSize();
if (!SectSize)
continue;
// Get the list of all the symbols in this section.
SectionSymbolsTy &Symbols = AllSymbols[Section];
std::vector<uint64_t> DataMappingSymsAddr;
std::vector<uint64_t> TextMappingSymsAddr;
if (isArmElf(Obj)) {
for (const auto &Symb : Symbols) {
uint64_t Address = std::get<0>(Symb);
StringRef Name = std::get<1>(Symb);
if (Name.startswith("$d"))
DataMappingSymsAddr.push_back(Address - SectionAddr);
if (Name.startswith("$x"))
TextMappingSymsAddr.push_back(Address - SectionAddr);
if (Name.startswith("$a"))
TextMappingSymsAddr.push_back(Address - SectionAddr);
if (Name.startswith("$t"))
TextMappingSymsAddr.push_back(Address - SectionAddr);
}
}
llvm::sort(DataMappingSymsAddr);
llvm::sort(TextMappingSymsAddr);
if (Obj->isELF() && Obj->getArch() == Triple::amdgcn) {
// AMDGPU disassembler uses symbolizer for printing labels
std::unique_ptr<MCRelocationInfo> RelInfo(
TheTarget->createMCRelocationInfo(TripleName, Ctx));
if (RelInfo) {
std::unique_ptr<MCSymbolizer> Symbolizer(
TheTarget->createMCSymbolizer(
TripleName, nullptr, nullptr, &Symbols, &Ctx, std::move(RelInfo)));
DisAsm->setSymbolizer(std::move(Symbolizer));
}
}
StringRef SegmentName = "";
if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(Obj)) {
DataRefImpl DR = Section.getRawDataRefImpl();
SegmentName = MachO->getSectionFinalSegmentName(DR);
}
StringRef SectionName;
error(Section.getName(SectionName));
// If the section has no symbol at the start, just insert a dummy one.
if (Symbols.empty() || std::get<0>(Symbols[0]) != 0) {
Symbols.insert(
Symbols.begin(),
std::make_tuple(SectionAddr, SectionName,
Section.isText() ? ELF::STT_FUNC : ELF::STT_OBJECT));
}
SmallString<40> Comments;
raw_svector_ostream CommentStream(Comments);
ArrayRef<uint8_t> Bytes = arrayRefFromStringRef(
unwrapOrError(Section.getContents(), Obj->getFileName()));
uint64_t VMAAdjustment = 0;
if (shouldAdjustVA(Section))
VMAAdjustment = AdjustVMA;
uint64_t Size;
uint64_t Index;
bool PrintedSection = false;
std::vector<RelocationRef> Rels = RelocMap[Section];
std::vector<RelocationRef>::const_iterator RelCur = Rels.begin();
std::vector<RelocationRef>::const_iterator RelEnd = Rels.end();
// Disassemble symbol by symbol.
for (unsigned SI = 0, SE = Symbols.size(); SI != SE; ++SI) {
// Skip if --disassemble-functions is not empty and the symbol is not in
// the list.
if (!DisasmFuncsSet.empty() &&
!DisasmFuncsSet.count(std::get<1>(Symbols[SI])))
continue;
uint64_t Start = std::get<0>(Symbols[SI]);
if (Start < SectionAddr || StopAddress <= Start)
continue;
// The end is the section end, the beginning of the next symbol, or
// --stop-address.
uint64_t End = std::min<uint64_t>(SectionAddr + SectSize, StopAddress);
if (SI + 1 < SE)
End = std::min(End, std::get<0>(Symbols[SI + 1]));
if (Start >= End || End <= StartAddress)
continue;
Start -= SectionAddr;
End -= SectionAddr;
if (!PrintedSection) {
PrintedSection = true;
outs() << "\nDisassembly of section ";
if (!SegmentName.empty())
outs() << SegmentName << ",";
outs() << SectionName << ":\n";
}
if (Obj->isELF() && Obj->getArch() == Triple::amdgcn) {
if (std::get<2>(Symbols[SI]) == ELF::STT_AMDGPU_HSA_KERNEL) {
// skip amd_kernel_code_t at the begining of kernel symbol (256 bytes)
Start += 256;
}
if (SI == SE - 1 ||
std::get<2>(Symbols[SI + 1]) == ELF::STT_AMDGPU_HSA_KERNEL) {
// cut trailing zeroes at the end of kernel
// cut up to 256 bytes
const uint64_t EndAlign = 256;
const auto Limit = End - (std::min)(EndAlign, End - Start);
while (End > Limit &&
*reinterpret_cast<const support::ulittle32_t*>(&Bytes[End - 4]) == 0)
End -= 4;
}
}
outs() << '\n';
if (!NoLeadingAddr)
outs() << format("%016" PRIx64 " ",
SectionAddr + Start + VMAAdjustment);
StringRef SymbolName = std::get<1>(Symbols[SI]);
if (Demangle)
outs() << demangle(SymbolName) << ":\n";
else
outs() << SymbolName << ":\n";
// Don't print raw contents of a virtual section. A virtual section
// doesn't have any contents in the file.
if (Section.isVirtual()) {
outs() << "...\n";
continue;
}
#ifndef NDEBUG
raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
#else
raw_ostream &DebugOut = nulls();
#endif
// Some targets (like WebAssembly) have a special prelude at the start
// of each symbol.
DisAsm->onSymbolStart(SymbolName, Size, Bytes.slice(Start, End - Start),
SectionAddr + Start, DebugOut, CommentStream);
Start += Size;
Index = Start;
if (SectionAddr < StartAddress)
Index = std::max<uint64_t>(Index, StartAddress - SectionAddr);
// If there is a data symbol inside an ELF text section and we are
// only disassembling text (applicable all architectures), we are in a
// situation where we must print the data and not disassemble it.
if (Obj->isELF() && std::get<2>(Symbols[SI]) == ELF::STT_OBJECT &&
!DisassembleAll && Section.isText()) {
dumpELFData(SectionAddr, Index, End, Bytes);
Index = End;
}
bool CheckARMELFData = isArmElf(Obj) &&
std::get<2>(Symbols[SI]) != ELF::STT_OBJECT &&
!DisassembleAll;
while (Index < End) {
// AArch64 ELF binaries can interleave data and text in the same
// section. We rely on the markers introduced to understand what we
// need to dump. If the data marker is within a function, it is
// denoted as a word/short etc.
if (CheckARMELFData &&
std::binary_search(DataMappingSymsAddr.begin(),
DataMappingSymsAddr.end(), Index)) {
Index = dumpARMELFData(SectionAddr, Index, End, Obj, Bytes,
TextMappingSymsAddr);
continue;
}
// When -z or --disassemble-zeroes are given we always dissasemble
// them. Otherwise we might want to skip zero bytes we see.
if (!DisassembleZeroes) {
uint64_t MaxOffset = End - Index;
// For -reloc: print zero blocks patched by relocations, so that
// relocations can be shown in the dump.
if (RelCur != RelEnd)
MaxOffset = RelCur->getOffset() - Index;
if (size_t N =
countSkippableZeroBytes(Bytes.slice(Index, MaxOffset))) {
outs() << "\t\t..." << '\n';
Index += N;
continue;
}
}
// Disassemble a real instruction or a data when disassemble all is
// provided
MCInst Inst;
bool Disassembled = DisAsm->getInstruction(
Inst, Size, Bytes.slice(Index), SectionAddr + Index, DebugOut,
CommentStream);
if (Size == 0)
Size = 1;
PIP.printInst(
*IP, Disassembled ? &Inst : nullptr, Bytes.slice(Index, Size),
{SectionAddr + Index + VMAAdjustment, Section.getIndex()}, outs(),
"", *STI, &SP, &Rels);
outs() << CommentStream.str();
Comments.clear();
// Try to resolve the target of a call, tail call, etc. to a specific
// symbol.
if (MIA && (MIA->isCall(Inst) || MIA->isUnconditionalBranch(Inst) ||
MIA->isConditionalBranch(Inst))) {
uint64_t Target;
if (MIA->evaluateBranch(Inst, SectionAddr + Index, Size, Target)) {
// In a relocatable object, the target's section must reside in
// the same section as the call instruction or it is accessed
// through a relocation.
//
// In a non-relocatable object, the target may be in any section.
//
// N.B. We don't walk the relocations in the relocatable case yet.
auto *TargetSectionSymbols = &Symbols;
if (!Obj->isRelocatableObject()) {
auto It = llvm::bsearch(
SectionAddresses,
[=](const std::pair<uint64_t, SectionRef> &RHS) {
return Target < RHS.first;
});
if (It != SectionAddresses.begin()) {
--It;
TargetSectionSymbols = &AllSymbols[It->second];
} else {
TargetSectionSymbols = &AbsoluteSymbols;
}
}
// Find the last symbol in the section whose offset is less than
// or equal to the target. If there isn't a section that contains
// the target, find the nearest preceding absolute symbol.
auto TargetSym = llvm::bsearch(
*TargetSectionSymbols,
[=](const std::tuple<uint64_t, StringRef, uint8_t> &RHS) {
return Target < std::get<0>(RHS);
});
if (TargetSym == TargetSectionSymbols->begin()) {
TargetSectionSymbols = &AbsoluteSymbols;
TargetSym = llvm::bsearch(
AbsoluteSymbols,
[=](const std::tuple<uint64_t, StringRef, uint8_t> &RHS) {
return Target < std::get<0>(RHS);
});
}
if (TargetSym != TargetSectionSymbols->begin()) {
--TargetSym;
uint64_t TargetAddress = std::get<0>(*TargetSym);
StringRef TargetName = std::get<1>(*TargetSym);
outs() << " <" << TargetName;
uint64_t Disp = Target - TargetAddress;
if (Disp)
outs() << "+0x" << Twine::utohexstr(Disp);
outs() << '>';
}
}
}
outs() << "\n";
// Hexagon does this in pretty printer
if (Obj->getArch() != Triple::hexagon) {
// Print relocation for instruction.
while (RelCur != RelEnd) {
uint64_t Offset = RelCur->getOffset();
// If this relocation is hidden, skip it.
if (getHidden(*RelCur) || SectionAddr + Offset < StartAddress) {
++RelCur;
continue;
}
// Stop when RelCur's offset is past the current instruction.
if (Offset >= Index + Size)
break;
// When --adjust-vma is used, update the address printed.
if (RelCur->getSymbol() != Obj->symbol_end()) {
Expected<section_iterator> SymSI =
RelCur->getSymbol()->getSection();
if (SymSI && *SymSI != Obj->section_end() &&
shouldAdjustVA(**SymSI))
Offset += AdjustVMA;
}
printRelocation(*RelCur, SectionAddr + Offset,
Obj->getBytesInAddress());
++RelCur;
}
}
Index += Size;
}
}
}
}
static void disassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
if (StartAddress > StopAddress)
error("Start address should be less than stop address");
const Target *TheTarget = getTarget(Obj);
// Package up features to be passed to target/subtarget
SubtargetFeatures Features = Obj->getFeatures();
if (!MAttrs.empty())
for (unsigned I = 0; I != MAttrs.size(); ++I)
Features.AddFeature(MAttrs[I]);
std::unique_ptr<const MCRegisterInfo> MRI(
TheTarget->createMCRegInfo(TripleName));
if (!MRI)
report_error(Obj->getFileName(),
"no register info for target " + TripleName);
// Set up disassembler.
std::unique_ptr<const MCAsmInfo> AsmInfo(
TheTarget->createMCAsmInfo(*MRI, TripleName));
if (!AsmInfo)
report_error(Obj->getFileName(),
"no assembly info for target " + TripleName);
std::unique_ptr<const MCSubtargetInfo> STI(
TheTarget->createMCSubtargetInfo(TripleName, MCPU, Features.getString()));
if (!STI)
report_error(Obj->getFileName(),
"no subtarget info for target " + TripleName);
std::unique_ptr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo());
if (!MII)
report_error(Obj->getFileName(),
"no instruction info for target " + TripleName);
MCObjectFileInfo MOFI;
MCContext Ctx(AsmInfo.get(), MRI.get(), &MOFI);
// FIXME: for now initialize MCObjectFileInfo with default values
MOFI.InitMCObjectFileInfo(Triple(TripleName), false, Ctx);
std::unique_ptr<MCDisassembler> DisAsm(
TheTarget->createMCDisassembler(*STI, Ctx));
if (!DisAsm)
report_error(Obj->getFileName(),
"no disassembler for target " + TripleName);
std::unique_ptr<const MCInstrAnalysis> MIA(
TheTarget->createMCInstrAnalysis(MII.get()));
int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
std::unique_ptr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
Triple(TripleName), AsmPrinterVariant, *AsmInfo, *MII, *MRI));
if (!IP)
report_error(Obj->getFileName(),
"no instruction printer for target " + TripleName);
IP->setPrintImmHex(PrintImmHex);
PrettyPrinter &PIP = selectPrettyPrinter(Triple(TripleName));
SourcePrinter SP(Obj, TheTarget->getName());
for (StringRef Opt : DisassemblerOptions)
if (!IP->applyTargetSpecificCLOption(Opt))
error("Unrecognized disassembler option: " + Opt);
disassembleObject(TheTarget, Obj, Ctx, DisAsm.get(), MIA.get(), IP.get(),
STI.get(), PIP, SP, InlineRelocs);
}
void printRelocations(const ObjectFile *Obj) {
StringRef Fmt = Obj->getBytesInAddress() > 4 ? "%016" PRIx64 :
"%08" PRIx64;
// Regular objdump doesn't print relocations in non-relocatable object
// files.
if (!Obj->isRelocatableObject())
return;
// Build a mapping from relocation target to a vector of relocation
// sections. Usually, there is an only one relocation section for
// each relocated section.
MapVector<SectionRef, std::vector<SectionRef>> SecToRelSec;
for (const SectionRef &Section : ToolSectionFilter(*Obj)) {
if (Section.relocation_begin() == Section.relocation_end())
continue;
const SectionRef TargetSec = *Section.getRelocatedSection();
SecToRelSec[TargetSec].push_back(Section);
}
for (std::pair<SectionRef, std::vector<SectionRef>> &P : SecToRelSec) {
StringRef SecName;
error(P.first.getName(SecName));
outs() << "RELOCATION RECORDS FOR [" << SecName << "]:\n";
for (SectionRef Section : P.second) {
for (const RelocationRef &Reloc : Section.relocations()) {
uint64_t Address = Reloc.getOffset();
SmallString<32> RelocName;
SmallString<32> ValueStr;
if (Address < StartAddress || Address > StopAddress || getHidden(Reloc))
continue;
Reloc.getTypeName(RelocName);
error(getRelocationValueString(Reloc, ValueStr));
outs() << format(Fmt.data(), Address) << " " << RelocName << " "
<< ValueStr << "\n";
}
}
outs() << "\n";
}
}
void printDynamicRelocations(const ObjectFile *Obj) {
// For the moment, this option is for ELF only
if (!Obj->isELF())
return;
const auto *Elf = dyn_cast<ELFObjectFileBase>(Obj);
if (!Elf || Elf->getEType() != ELF::ET_DYN) {
error("not a dynamic object");
return;
}
std::vector<SectionRef> DynRelSec = Obj->dynamic_relocation_sections();
if (DynRelSec.empty())
return;
outs() << "DYNAMIC RELOCATION RECORDS\n";
StringRef Fmt = Obj->getBytesInAddress() > 4 ? "%016" PRIx64 : "%08" PRIx64;
for (const SectionRef &Section : DynRelSec)
for (const RelocationRef &Reloc : Section.relocations()) {
uint64_t Address = Reloc.getOffset();
SmallString<32> RelocName;
SmallString<32> ValueStr;
Reloc.getTypeName(RelocName);
error(getRelocationValueString(Reloc, ValueStr));
outs() << format(Fmt.data(), Address) << " " << RelocName << " "
<< ValueStr << "\n";
}
}
// Returns true if we need to show LMA column when dumping section headers. We
// show it only when the platform is ELF and either we have at least one section
// whose VMA and LMA are different and/or when --show-lma flag is used.
static bool shouldDisplayLMA(const ObjectFile *Obj) {
if (!Obj->isELF())
return false;
for (const SectionRef &S : ToolSectionFilter(*Obj))
if (S.getAddress() != getELFSectionLMA(S))
return true;
return ShowLMA;
}
void printSectionHeaders(const ObjectFile *Obj) {
bool HasLMAColumn = shouldDisplayLMA(Obj);
if (HasLMAColumn)
outs() << "Sections:\n"
"Idx Name Size VMA LMA "
"Type\n";
else
outs() << "Sections:\n"
"Idx Name Size VMA Type\n";
for (const SectionRef &Section : ToolSectionFilter(*Obj)) {
StringRef Name;
error(Section.getName(Name));
uint64_t VMA = Section.getAddress();
if (shouldAdjustVA(Section))
VMA += AdjustVMA;
uint64_t Size = Section.getSize();
bool Text = Section.isText();
bool Data = Section.isData();
bool BSS = Section.isBSS();
std::string Type = (std::string(Text ? "TEXT " : "") +
(Data ? "DATA " : "") + (BSS ? "BSS" : ""));
if (HasLMAColumn)
outs() << format("%3d %-13s %08" PRIx64 " %016" PRIx64 " %016" PRIx64
" %s\n",
(unsigned)Section.getIndex(), Name.str().c_str(), Size,
VMA, getELFSectionLMA(Section), Type.c_str());
else
outs() << format("%3d %-13s %08" PRIx64 " %016" PRIx64 " %s\n",
(unsigned)Section.getIndex(), Name.str().c_str(), Size,
VMA, Type.c_str());
}
outs() << "\n";
}
void printSectionContents(const ObjectFile *Obj) {
for (const SectionRef &Section : ToolSectionFilter(*Obj)) {
StringRef Name;
error(Section.getName(Name));
uint64_t BaseAddr = Section.getAddress();
uint64_t Size = Section.getSize();
if (!Size)
continue;
outs() << "Contents of section " << Name << ":\n";
if (Section.isBSS()) {
outs() << format("<skipping contents of bss section at [%04" PRIx64
", %04" PRIx64 ")>\n",
BaseAddr, BaseAddr + Size);
continue;
}
StringRef Contents = unwrapOrError(Section.getContents(), Obj->getFileName());
// Dump out the content as hex and printable ascii characters.
for (std::size_t Addr = 0, End = Contents.size(); Addr < End; Addr += 16) {
outs() << format(" %04" PRIx64 " ", BaseAddr + Addr);
// Dump line of hex.
for (std::size_t I = 0; I < 16; ++I) {
if (I != 0 && I % 4 == 0)
outs() << ' ';
if (Addr + I < End)
outs() << hexdigit((Contents[Addr + I] >> 4) & 0xF, true)
<< hexdigit(Contents[Addr + I] & 0xF, true);
else
outs() << " ";
}
// Print ascii.
outs() << " ";
for (std::size_t I = 0; I < 16 && Addr + I < End; ++I) {
if (isPrint(static_cast<unsigned char>(Contents[Addr + I]) & 0xFF))
outs() << Contents[Addr + I];
else
outs() << ".";
}
outs() << "\n";
}
}
}
void printSymbolTable(const ObjectFile *O, StringRef ArchiveName,
StringRef ArchitectureName) {
outs() << "SYMBOL TABLE:\n";
if (const COFFObjectFile *Coff = dyn_cast<const COFFObjectFile>(O)) {
printCOFFSymbolTable(Coff);
return;
}
const StringRef FileName = O->getFileName();
for (auto I = O->symbol_begin(), E = O->symbol_end(); I != E; ++I) {
// Skip printing the special zero symbol when dumping an ELF file.
// This makes the output consistent with the GNU objdump.
if (I == O->symbol_begin() && isa<ELFObjectFileBase>(O))
continue;
const SymbolRef &Symbol = *I;
uint64_t Address = unwrapOrError(Symbol.getAddress(), ArchiveName, FileName,
ArchitectureName);
if ((Address < StartAddress) || (Address > StopAddress))
continue;
SymbolRef::Type Type = unwrapOrError(Symbol.getType(), ArchiveName,
FileName, ArchitectureName);
uint32_t Flags = Symbol.getFlags();
section_iterator Section = unwrapOrError(Symbol.getSection(), ArchiveName,
FileName, ArchitectureName);
StringRef Name;
if (Type == SymbolRef::ST_Debug && Section != O->section_end())
Section->getName(Name);
else
Name = unwrapOrError(Symbol.getName(), ArchiveName, FileName,
ArchitectureName);
bool Global = Flags & SymbolRef::SF_Global;
bool Weak = Flags & SymbolRef::SF_Weak;
bool Absolute = Flags & SymbolRef::SF_Absolute;
bool Common = Flags & SymbolRef::SF_Common;
bool Hidden = Flags & SymbolRef::SF_Hidden;
char GlobLoc = ' ';
if (Type != SymbolRef::ST_Unknown)
GlobLoc = Global ? 'g' : 'l';
char Debug = (Type == SymbolRef::ST_Debug || Type == SymbolRef::ST_File)
? 'd' : ' ';
char FileFunc = ' ';
if (Type == SymbolRef::ST_File)
FileFunc = 'f';
else if (Type == SymbolRef::ST_Function)
FileFunc = 'F';
else if (Type == SymbolRef::ST_Data)
FileFunc = 'O';
const char *Fmt = O->getBytesInAddress() > 4 ? "%016" PRIx64 :
"%08" PRIx64;
outs() << format(Fmt, Address) << " "
<< GlobLoc // Local -> 'l', Global -> 'g', Neither -> ' '
<< (Weak ? 'w' : ' ') // Weak?
<< ' ' // Constructor. Not supported yet.
<< ' ' // Warning. Not supported yet.
<< ' ' // Indirect reference to another symbol.
<< Debug // Debugging (d) or dynamic (D) symbol.
<< FileFunc // Name of function (F), file (f) or object (O).
<< ' ';
if (Absolute) {
outs() << "*ABS*";
} else if (Common) {
outs() << "*COM*";
} else if (Section == O->section_end()) {
outs() << "*UND*";
} else {
if (const MachOObjectFile *MachO =
dyn_cast<const MachOObjectFile>(O)) {
DataRefImpl DR = Section->getRawDataRefImpl();
StringRef SegmentName = MachO->getSectionFinalSegmentName(DR);
outs() << SegmentName << ",";
}
StringRef SectionName;
error(Section->getName(SectionName));
outs() << SectionName;
}
if (Common || isa<ELFObjectFileBase>(O)) {
uint64_t Val =
Common ? Symbol.getAlignment() : ELFSymbolRef(Symbol).getSize();
outs() << format("\t%08" PRIx64, Val);
}
if (isa<ELFObjectFileBase>(O)) {
uint8_t Other = ELFSymbolRef(Symbol).getOther();
switch (Other) {
case ELF::STV_DEFAULT:
break;
case ELF::STV_INTERNAL:
outs() << " .internal";
break;
case ELF::STV_HIDDEN:
outs() << " .hidden";
break;
case ELF::STV_PROTECTED:
outs() << " .protected";
break;
default:
outs() << format(" 0x%02x", Other);
break;
}
} else if (Hidden) {
outs() << " .hidden";
}
if (Demangle)
outs() << ' ' << demangle(Name) << '\n';
else
outs() << ' ' << Name << '\n';
}
}
static void printUnwindInfo(const ObjectFile *O) {
outs() << "Unwind info:\n\n";
if (const COFFObjectFile *Coff = dyn_cast<COFFObjectFile>(O))
printCOFFUnwindInfo(Coff);
else if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(O))
printMachOUnwindInfo(MachO);
else
// TODO: Extract DWARF dump tool to objdump.
WithColor::error(errs(), ToolName)
<< "This operation is only currently supported "
"for COFF and MachO object files.\n";
}
/// Dump the raw contents of the __clangast section so the output can be piped
/// into llvm-bcanalyzer.
void printRawClangAST(const ObjectFile *Obj) {
if (outs().is_displayed()) {
WithColor::error(errs(), ToolName)
<< "The -raw-clang-ast option will dump the raw binary contents of "
"the clang ast section.\n"
"Please redirect the output to a file or another program such as "
"llvm-bcanalyzer.\n";
return;
}
StringRef ClangASTSectionName("__clangast");
if (isa<COFFObjectFile>(Obj)) {
ClangASTSectionName = "clangast";
}
Optional<object::SectionRef> ClangASTSection;
for (auto Sec : ToolSectionFilter(*Obj)) {
StringRef Name;
Sec.getName(Name);
if (Name == ClangASTSectionName) {
ClangASTSection = Sec;
break;
}
}
if (!ClangASTSection)
return;
StringRef ClangASTContents = unwrapOrError(
ClangASTSection.getValue().getContents(), Obj->getFileName());
outs().write(ClangASTContents.data(), ClangASTContents.size());
}
static void printFaultMaps(const ObjectFile *Obj) {
StringRef FaultMapSectionName;
if (isa<ELFObjectFileBase>(Obj)) {
FaultMapSectionName = ".llvm_faultmaps";
} else if (isa<MachOObjectFile>(Obj)) {
FaultMapSectionName = "__llvm_faultmaps";
} else {
WithColor::error(errs(), ToolName)
<< "This operation is only currently supported "
"for ELF and Mach-O executable files.\n";
return;
}
Optional<object::SectionRef> FaultMapSection;
for (auto Sec : ToolSectionFilter(*Obj)) {
StringRef Name;
Sec.getName(Name);
if (Name == FaultMapSectionName) {
FaultMapSection = Sec;
break;
}
}
outs() << "FaultMap table:\n";
if (!FaultMapSection.hasValue()) {
outs() << "<not found>\n";
return;
}
StringRef FaultMapContents =
unwrapOrError(FaultMapSection.getValue().getContents(), Obj->getFileName());
FaultMapParser FMP(FaultMapContents.bytes_begin(),
FaultMapContents.bytes_end());
outs() << FMP;
}
static void printPrivateFileHeaders(const ObjectFile *O, bool OnlyFirst) {
if (O->isELF()) {
printELFFileHeader(O);
printELFDynamicSection(O);
printELFSymbolVersionInfo(O);
return;
}
if (O->isCOFF())
return printCOFFFileHeader(O);
if (O->isWasm())
return printWasmFileHeader(O);
if (O->isMachO()) {
printMachOFileHeader(O);
if (!OnlyFirst)
printMachOLoadCommands(O);
return;
}
report_error(O->getFileName(), "Invalid/Unsupported object file format");
}
static void printFileHeaders(const ObjectFile *O) {
if (!O->isELF() && !O->isCOFF())
report_error(O->getFileName(), "Invalid/Unsupported object file format");
Triple::ArchType AT = O->getArch();
outs() << "architecture: " << Triple::getArchTypeName(AT) << "\n";
uint64_t Address = unwrapOrError(O->getStartAddress(), O->getFileName());
StringRef Fmt = O->getBytesInAddress() > 4 ? "%016" PRIx64 : "%08" PRIx64;
outs() << "start address: "
<< "0x" << format(Fmt.data(), Address) << "\n\n";
}
static void printArchiveChild(StringRef Filename, const Archive::Child &C) {
Expected<sys::fs::perms> ModeOrErr = C.getAccessMode();
if (!ModeOrErr) {
WithColor::error(errs(), ToolName) << "ill-formed archive entry.\n";
consumeError(ModeOrErr.takeError());
return;
}
sys::fs::perms Mode = ModeOrErr.get();
outs() << ((Mode & sys::fs::owner_read) ? "r" : "-");
outs() << ((Mode & sys::fs::owner_write) ? "w" : "-");
outs() << ((Mode & sys::fs::owner_exe) ? "x" : "-");
outs() << ((Mode & sys::fs::group_read) ? "r" : "-");
outs() << ((Mode & sys::fs::group_write) ? "w" : "-");
outs() << ((Mode & sys::fs::group_exe) ? "x" : "-");
outs() << ((Mode & sys::fs::others_read) ? "r" : "-");
outs() << ((Mode & sys::fs::others_write) ? "w" : "-");
outs() << ((Mode & sys::fs::others_exe) ? "x" : "-");
outs() << " ";
outs() << format("%d/%d %6" PRId64 " ", unwrapOrError(C.getUID(), Filename),
unwrapOrError(C.getGID(), Filename),
unwrapOrError(C.getRawSize(), Filename));
StringRef RawLastModified = C.getRawLastModified();
unsigned Seconds;
if (RawLastModified.getAsInteger(10, Seconds))
outs() << "(date: \"" << RawLastModified
<< "\" contains non-decimal chars) ";
else {
// Since ctime(3) returns a 26 character string of the form:
// "Sun Sep 16 01:03:52 1973\n\0"
// just print 24 characters.
time_t t = Seconds;
outs() << format("%.24s ", ctime(&t));
}
StringRef Name = "";
Expected<StringRef> NameOrErr = C.getName();
if (!NameOrErr) {
consumeError(NameOrErr.takeError());
Name = unwrapOrError(C.getRawName(), Filename);
} else {
Name = NameOrErr.get();
}
outs() << Name << "\n";
}
static void dumpObject(ObjectFile *O, const Archive *A = nullptr,
const Archive::Child *C = nullptr) {
// Avoid other output when using a raw option.
if (!RawClangAST) {
outs() << '\n';
if (A)
outs() << A->getFileName() << "(" << O->getFileName() << ")";
else
outs() << O->getFileName();
outs() << ":\tfile format " << O->getFileFormatName() << "\n\n";
}
StringRef ArchiveName = A ? A->getFileName() : "";
if (FileHeaders)
printFileHeaders(O);
if (ArchiveHeaders && !MachOOpt && C)
printArchiveChild(ArchiveName, *C);
if (Disassemble)
disassembleObject(O, Relocations);
if (Relocations && !Disassemble)
printRelocations(O);
if (DynamicRelocations)
printDynamicRelocations(O);
if (SectionHeaders)
printSectionHeaders(O);
if (SectionContents)
printSectionContents(O);
if (SymbolTable)
printSymbolTable(O, ArchiveName);
if (UnwindInfo)
printUnwindInfo(O);
if (PrivateHeaders || FirstPrivateHeader)
printPrivateFileHeaders(O, FirstPrivateHeader);
if (ExportsTrie)
printExportsTrie(O);
if (Rebase)
printRebaseTable(O);
if (Bind)
printBindTable(O);
if (LazyBind)
printLazyBindTable(O);
if (WeakBind)
printWeakBindTable(O);
if (RawClangAST)
printRawClangAST(O);
if (FaultMapSection)
printFaultMaps(O);
if (DwarfDumpType != DIDT_Null) {
std::unique_ptr<DIContext> DICtx = DWARFContext::create(*O);
// Dump the complete DWARF structure.
DIDumpOptions DumpOpts;
DumpOpts.DumpType = DwarfDumpType;
DICtx->dump(outs(), DumpOpts);
}
}
static void dumpObject(const COFFImportFile *I, const Archive *A,
const Archive::Child *C = nullptr) {
StringRef ArchiveName = A ? A->getFileName() : "";
// Avoid other output when using a raw option.
if (!RawClangAST)
outs() << '\n'
<< ArchiveName << "(" << I->getFileName() << ")"
<< ":\tfile format COFF-import-file"
<< "\n\n";
if (ArchiveHeaders && !MachOOpt && C)
printArchiveChild(ArchiveName, *C);
if (SymbolTable)
printCOFFSymbolTable(I);
}
/// Dump each object file in \a a;
static void dumpArchive(const Archive *A) {
Error Err = Error::success();
for (auto &C : A->children(Err)) {
Expected<std::unique_ptr<Binary>> ChildOrErr = C.getAsBinary();
if (!ChildOrErr) {
if (auto E = isNotObjectErrorInvalidFileType(ChildOrErr.takeError()))
report_error(std::move(E), A->getFileName(), C);
continue;
}
if (ObjectFile *O = dyn_cast<ObjectFile>(&*ChildOrErr.get()))
dumpObject(O, A, &C);
else if (COFFImportFile *I = dyn_cast<COFFImportFile>(&*ChildOrErr.get()))
dumpObject(I, A, &C);
else
report_error(errorCodeToError(object_error::invalid_file_type),
A->getFileName());
}
if (Err)
report_error(std::move(Err), A->getFileName());
}
/// Open file and figure out how to dump it.
static void dumpInput(StringRef file) {
// If we are using the Mach-O specific object file parser, then let it parse
// the file and process the command line options. So the -arch flags can
// be used to select specific slices, etc.
if (MachOOpt) {
parseInputMachO(file);
return;
}
// Attempt to open the binary.
OwningBinary<Binary> OBinary = unwrapOrError(createBinary(file), file);
Binary &Binary = *OBinary.getBinary();
if (Archive *A = dyn_cast<Archive>(&Binary))
dumpArchive(A);
else if (ObjectFile *O = dyn_cast<ObjectFile>(&Binary))
dumpObject(O);
else if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(&Binary))
parseInputMachO(UB);
else
report_error(errorCodeToError(object_error::invalid_file_type), file);
}
} // namespace llvm
int main(int argc, char **argv) {
using namespace llvm;
InitLLVM X(argc, argv);
const cl::OptionCategory *OptionFilters[] = {&ObjdumpCat, &MachOCat};
cl::HideUnrelatedOptions(OptionFilters);
// Initialize targets and assembly printers/parsers.
InitializeAllTargetInfos();
InitializeAllTargetMCs();
InitializeAllDisassemblers();
// Register the target printer for --version.
cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
cl::ParseCommandLineOptions(argc, argv, "llvm object file dumper\n");
ToolName = argv[0];
// Defaults to a.out if no filenames specified.
if (InputFilenames.empty())
InputFilenames.push_back("a.out");
if (AllHeaders)
ArchiveHeaders = FileHeaders = PrivateHeaders = Relocations =
SectionHeaders = SymbolTable = true;
if (DisassembleAll || PrintSource || PrintLines ||
(!DisassembleFunctions.empty()))
Disassemble = true;
if (!ArchiveHeaders && !Disassemble && DwarfDumpType == DIDT_Null &&
!DynamicRelocations && !FileHeaders && !PrivateHeaders && !RawClangAST &&
!Relocations && !SectionHeaders && !SectionContents && !SymbolTable &&
!UnwindInfo && !FaultMapSection &&
!(MachOOpt &&
(Bind || DataInCode || DylibId || DylibsUsed || ExportsTrie ||
FirstPrivateHeader || IndirectSymbols || InfoPlist || LazyBind ||
LinkOptHints || ObjcMetaData || Rebase || UniversalHeaders ||
WeakBind || !FilterSections.empty()))) {
cl::PrintHelpMessage();
return 2;
}
DisasmFuncsSet.insert(DisassembleFunctions.begin(),
DisassembleFunctions.end());
llvm::for_each(InputFilenames, dumpInput);
return EXIT_SUCCESS;
}
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