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android / toolchain / llvm / 45d116d45ea75efdab6284f2d9737b31feaee62c / . / tools / llvm-objdump / llvm-objdump.cpp
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//===-- llvm-objdump.cpp - Object file dumping utility for llvm -----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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;
using namespace object;
cl::opt<bool>
llvm::AllHeaders("all-headers",
cl::desc("Display all available header information"));
static cl::alias AllHeadersShort("x", cl::desc("Alias for --all-headers"),
cl::aliasopt(AllHeaders));
static cl::list<std::string>
InputFilenames(cl::Positional, cl::desc("<input object files>"),cl::ZeroOrMore);
cl::opt<bool>
llvm::Disassemble("disassemble",
cl::desc("Display assembler mnemonics for the machine instructions"));
static cl::alias
Disassembled("d", cl::desc("Alias for --disassemble"),
cl::aliasopt(Disassemble));
cl::opt<bool>
llvm::DisassembleAll("disassemble-all",
cl::desc("Display assembler mnemonics for the machine instructions"));
static cl::alias
DisassembleAlld("D", cl::desc("Alias for --disassemble-all"),
cl::aliasopt(DisassembleAll));
cl::opt<bool> llvm::Demangle("demangle", cl::desc("Demangle symbols names"),
cl::init(false));
static cl::alias DemangleShort("C", cl::desc("Alias for --demangle"),
cl::aliasopt(llvm::Demangle));
static cl::list<std::string>
DisassembleFunctions("df",
cl::CommaSeparated,
cl::desc("List of functions to disassemble"));
static StringSet<> DisasmFuncsSet;
cl::opt<bool>
llvm::Relocations("reloc",
cl::desc("Display the relocation entries in the file"));
static cl::alias RelocationsShort("r", cl::desc("Alias for --reloc"),
cl::NotHidden,
cl::aliasopt(llvm::Relocations));
cl::opt<bool>
llvm::DynamicRelocations("dynamic-reloc",
cl::desc("Display the dynamic relocation entries in the file"));
static cl::alias
DynamicRelocationsd("R", cl::desc("Alias for --dynamic-reloc"),
cl::aliasopt(DynamicRelocations));
cl::opt<bool>
llvm::SectionContents("full-contents",
cl::desc("Display the content of each section"));
static cl::alias SectionContentsShort("s",
cl::desc("Alias for --full-contents"),
cl::aliasopt(SectionContents));
cl::opt<bool> llvm::SymbolTable("syms", cl::desc("Display the symbol table"));
static cl::alias SymbolTableShort("t", cl::desc("Alias for --syms"),
cl::NotHidden,
cl::aliasopt(llvm::SymbolTable));
cl::opt<bool>
llvm::ExportsTrie("exports-trie", cl::desc("Display mach-o exported symbols"));
cl::opt<bool>
llvm::Rebase("rebase", cl::desc("Display mach-o rebasing info"));
cl::opt<bool>
llvm::Bind("bind", cl::desc("Display mach-o binding info"));
cl::opt<bool>
llvm::LazyBind("lazy-bind", cl::desc("Display mach-o lazy binding info"));
cl::opt<bool>
llvm::WeakBind("weak-bind", cl::desc("Display mach-o weak binding info"));
cl::opt<bool>
llvm::RawClangAST("raw-clang-ast",
cl::desc("Dump the raw binary contents of the clang AST section"));
static cl::opt<bool>
MachOOpt("macho", cl::desc("Use MachO specific object file parser"));
static cl::alias
MachOm("m", cl::desc("Alias for --macho"), cl::aliasopt(MachOOpt));
cl::opt<std::string>
llvm::TripleName("triple", cl::desc("Target triple to disassemble for, "
"see -version for available targets"));
cl::opt<std::string>
llvm::MCPU("mcpu",
cl::desc("Target a specific cpu type (-mcpu=help for details)"),
cl::value_desc("cpu-name"),
cl::init(""));
cl::opt<std::string>
llvm::ArchName("arch-name", cl::desc("Target arch to disassemble for, "
"see -version for available targets"));
cl::opt<bool>
llvm::SectionHeaders("section-headers", cl::desc("Display summaries of the "
"headers for each section."));
static cl::alias
SectionHeadersShort("headers", cl::desc("Alias for --section-headers"),
cl::aliasopt(SectionHeaders));
static cl::alias
SectionHeadersShorter("h", cl::desc("Alias for --section-headers"),
cl::aliasopt(SectionHeaders));
cl::list<std::string>
llvm::FilterSections("section", cl::desc("Operate on the specified sections only. "
"With -macho dump segment,section"));
cl::alias
static FilterSectionsj("j", cl::desc("Alias for --section"),
cl::aliasopt(llvm::FilterSections));
cl::list<std::string>
llvm::MAttrs("mattr",
cl::CommaSeparated,
cl::desc("Target specific attributes"),
cl::value_desc("a1,+a2,-a3,..."));
cl::opt<bool>
llvm::NoShowRawInsn("no-show-raw-insn", cl::desc("When disassembling "
"instructions, do not print "
"the instruction bytes."));
cl::opt<bool>
llvm::NoLeadingAddr("no-leading-addr", cl::desc("Print no leading address"));
cl::opt<bool>
llvm::UnwindInfo("unwind-info", cl::desc("Display unwind information"));
static cl::alias
UnwindInfoShort("u", cl::desc("Alias for --unwind-info"),
cl::aliasopt(UnwindInfo));
cl::opt<bool>
llvm::PrivateHeaders("private-headers",
cl::desc("Display format specific file headers"));
cl::opt<bool>
llvm::FirstPrivateHeader("private-header",
cl::desc("Display only the first format specific file "
"header"));
static cl::alias
PrivateHeadersShort("p", cl::desc("Alias for --private-headers"),
cl::aliasopt(PrivateHeaders));
cl::opt<bool> llvm::FileHeaders(
"file-headers",
cl::desc("Display the contents of the overall file header"));
static cl::alias FileHeadersShort("f", cl::desc("Alias for --file-headers"),
cl::aliasopt(FileHeaders));
cl::opt<bool>
llvm::ArchiveHeaders("archive-headers",
cl::desc("Display archive header information"));
cl::alias
ArchiveHeadersShort("a", cl::desc("Alias for --archive-headers"),
cl::aliasopt(ArchiveHeaders));
cl::opt<bool>
llvm::PrintImmHex("print-imm-hex",
cl::desc("Use hex format for immediate values"));
cl::opt<bool> PrintFaultMaps("fault-map-section",
cl::desc("Display contents of faultmap section"));
cl::opt<DIDumpType> llvm::DwarfDumpType(
"dwarf", cl::init(DIDT_Null), cl::desc("Dump of dwarf debug sections:"),
cl::values(clEnumValN(DIDT_DebugFrame, "frames", ".debug_frame")));
cl::opt<bool> PrintSource(
"source",
cl::desc(
"Display source inlined with disassembly. Implies disassemble object"));
cl::alias PrintSourceShort("S", cl::desc("Alias for -source"),
cl::aliasopt(PrintSource));
cl::opt<bool> PrintLines("line-numbers",
cl::desc("Display source line numbers with "
"disassembly. Implies disassemble object"));
cl::alias PrintLinesShort("l", cl::desc("Alias for -line-numbers"),
cl::aliasopt(PrintLines));
cl::opt<unsigned long long>
StartAddress("start-address", cl::desc("Disassemble beginning at address"),
cl::value_desc("address"), cl::init(0));
cl::opt<unsigned long long>
StopAddress("stop-address",
cl::desc("Do not skip blocks of zeroes when disassembling"),
cl::value_desc("address"), cl::init(UINT64_MAX));
cl::opt<bool> DisassembleZeroes("disassemble-zeroes",
cl::desc("Do not skip blocks of zeroes when "
"disassembling the blocks of zeroes"));
cl::alias DisassembleZeroesShort("z",
cl::desc("Alias for --disassemble-zeroes"),
cl::aliasopt(DisassembleZeroes));
static StringRef ToolName;
typedef std::vector<std::tuple<uint64_t, StringRef, uint8_t>> SectionSymbolsTy;
namespace {
typedef std::function<bool(llvm::object::SectionRef const &)> FilterPredicate;
class SectionFilterIterator {
public:
SectionFilterIterator(FilterPredicate P,
llvm::object::section_iterator const &I,
llvm::object::section_iterator const &E)
: Predicate(std::move(P)), Iterator(I), End(E) {
ScanPredicate();
}
const llvm::object::SectionRef &operator*() const { return *Iterator; }
SectionFilterIterator &operator++() {
++Iterator;
ScanPredicate();
return *this;
}
bool operator!=(SectionFilterIterator const &Other) const {
return Iterator != Other.Iterator;
}
private:
void ScanPredicate() {
while (Iterator != End && !Predicate(*Iterator)) {
++Iterator;
}
}
FilterPredicate Predicate;
llvm::object::section_iterator Iterator;
llvm::object::section_iterator End;
};
class SectionFilter {
public:
SectionFilter(FilterPredicate P, llvm::object::ObjectFile const &O)
: Predicate(std::move(P)), Object(O) {}
SectionFilterIterator begin() {
return SectionFilterIterator(Predicate, Object.section_begin(),
Object.section_end());
}
SectionFilterIterator end() {
return SectionFilterIterator(Predicate, Object.section_end(),
Object.section_end());
}
private:
FilterPredicate Predicate;
llvm::object::ObjectFile const &Object;
};
SectionFilter ToolSectionFilter(llvm::object::ObjectFile const &O) {
return SectionFilter(
[](llvm::object::SectionRef const &S) {
if (FilterSections.empty())
return true;
llvm::StringRef String;
std::error_code error = S.getName(String);
if (error)
return false;
return is_contained(FilterSections, String);
},
O);
}
}
void llvm::error(std::error_code EC) {
if (!EC)
return;
WithColor::error(errs(), ToolName)
<< "reading file: " << EC.message() << ".\n";
errs().flush();
exit(1);
}
LLVM_ATTRIBUTE_NORETURN void llvm::error(Twine Message) {
WithColor::error(errs(), ToolName) << Message << ".\n";
errs().flush();
exit(1);
}
void llvm::warn(StringRef Message) {
WithColor::warning(errs(), ToolName) << Message << ".\n";
errs().flush();
}
LLVM_ATTRIBUTE_NORETURN void llvm::report_error(StringRef File,
Twine Message) {
WithColor::error(errs(), ToolName)
<< "'" << File << "': " << Message << ".\n";
exit(1);
}
LLVM_ATTRIBUTE_NORETURN void llvm::report_error(StringRef File,
std::error_code EC) {
assert(EC);
WithColor::error(errs(), ToolName)
<< "'" << File << "': " << EC.message() << ".\n";
exit(1);
}
LLVM_ATTRIBUTE_NORETURN void llvm::report_error(StringRef File,
llvm::Error E) {
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 llvm::report_error(StringRef ArchiveName,
StringRef FileName,
llvm::Error E,
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 llvm::report_error(StringRef ArchiveName,
const object::Archive::Child &C,
llvm::Error E,
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());
llvm::report_error(ArchiveName, "???", std::move(E), ArchitectureName);
} else
llvm::report_error(ArchiveName, NameOrErr.get(), std::move(E),
ArchitectureName);
}
static const Target *getTarget(const ObjectFile *Obj = nullptr) {
// Figure out the target triple.
llvm::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 llvm::isRelocAddressLess(RelocationRef A, RelocationRef B) {
return A.getOffset() < B.getOffset();
}
static std::string demangle(StringRef Name) {
char *Demangled = nullptr;
if (Name.startswith("_Z"))
Demangled = itaniumDemangle(Name.data(), Demangled, nullptr, nullptr);
else if (Name.startswith("?"))
Demangled = microsoftDemangle(Name.data(), Demangled, nullptr, nullptr);
if (!Demangled)
return Name;
std::string Ret = Demangled;
free(Demangled);
return Ret;
}
template <class ELFT>
static std::error_code getRelocationValueString(const ELFObjectFile<ELFT> *Obj,
const RelocationRef &RelRef,
SmallVectorImpl<char> &Result) {
typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
typedef typename ELFObjectFile<ELFT>::Elf_Shdr Elf_Shdr;
typedef typename ELFObjectFile<ELFT>::Elf_Rela Elf_Rela;
const ELFFile<ELFT> &EF = *Obj->getELFFile();
DataRefImpl Rel = RelRef.getRawDataRefImpl();
auto SecOrErr = EF.getSection(Rel.d.a);
if (!SecOrErr)
return errorToErrorCode(SecOrErr.takeError());
const Elf_Shdr *Sec = *SecOrErr;
auto SymTabOrErr = EF.getSection(Sec->sh_link);
if (!SymTabOrErr)
return errorToErrorCode(SymTabOrErr.takeError());
const Elf_Shdr *SymTab = *SymTabOrErr;
assert(SymTab->sh_type == ELF::SHT_SYMTAB ||
SymTab->sh_type == ELF::SHT_DYNSYM);
auto StrTabSec = EF.getSection(SymTab->sh_link);
if (!StrTabSec)
return errorToErrorCode(StrTabSec.takeError());
auto StrTabOrErr = EF.getStringTable(*StrTabSec);
if (!StrTabOrErr)
return errorToErrorCode(StrTabOrErr.takeError());
StringRef StrTab = *StrTabOrErr;
int64_t Addend = 0;
// If there is no Symbol associated with the relocation, we set the undef
// boolean value to 'true'. This will prevent us from calling functions that
// requires the relocation to be associated with a symbol.
bool Undef = false;
switch (Sec->sh_type) {
default:
return object_error::parse_failed;
case ELF::SHT_REL: {
// TODO: Read implicit addend from section data.
break;
}
case ELF::SHT_RELA: {
const Elf_Rela *ERela = Obj->getRela(Rel);
Addend = ERela->r_addend;
Undef = ERela->getSymbol(false) == 0;
break;
}
}
std::string Target;
if (!Undef) {
symbol_iterator SI = RelRef.getSymbol();
const Elf_Sym *symb = Obj->getSymbol(SI->getRawDataRefImpl());
if (symb->getType() == ELF::STT_SECTION) {
Expected<section_iterator> SymSI = SI->getSection();
if (!SymSI)
return errorToErrorCode(SymSI.takeError());
const Elf_Shdr *SymSec = Obj->getSection((*SymSI)->getRawDataRefImpl());
auto SecName = EF.getSectionName(SymSec);
if (!SecName)
return errorToErrorCode(SecName.takeError());
Target = *SecName;
} else {
Expected<StringRef> SymName = symb->getName(StrTab);
if (!SymName)
return errorToErrorCode(SymName.takeError());
if (Demangle)
Target = demangle(*SymName);
else
Target = *SymName;
}
} else
Target = "*ABS*";
// Default scheme is to print Target, as well as "+ <addend>" for nonzero
// addend. Should be acceptable for all normal purposes.
std::string FmtBuf;
raw_string_ostream Fmt(FmtBuf);
Fmt << Target;
if (Addend != 0)
Fmt << (Addend < 0 ? "" : "+") << Addend;
Fmt.flush();
Result.append(FmtBuf.begin(), FmtBuf.end());
return std::error_code();
}
static std::error_code getRelocationValueString(const ELFObjectFileBase *Obj,
const RelocationRef &Rel,
SmallVectorImpl<char> &Result) {
if (auto *ELF32LE = dyn_cast<ELF32LEObjectFile>(Obj))
return getRelocationValueString(ELF32LE, Rel, Result);
if (auto *ELF64LE = dyn_cast<ELF64LEObjectFile>(Obj))
return getRelocationValueString(ELF64LE, Rel, Result);
if (auto *ELF32BE = dyn_cast<ELF32BEObjectFile>(Obj))
return getRelocationValueString(ELF32BE, Rel, Result);
auto *ELF64BE = cast<ELF64BEObjectFile>(Obj);
return getRelocationValueString(ELF64BE, Rel, Result);
}
static std::error_code getRelocationValueString(const COFFObjectFile *Obj,
const RelocationRef &Rel,
SmallVectorImpl<char> &Result) {
symbol_iterator SymI = Rel.getSymbol();
Expected<StringRef> SymNameOrErr = SymI->getName();
if (!SymNameOrErr)
return errorToErrorCode(SymNameOrErr.takeError());
StringRef SymName = *SymNameOrErr;
Result.append(SymName.begin(), SymName.end());
return std::error_code();
}
static void printRelocationTargetName(const MachOObjectFile *O,
const MachO::any_relocation_info &RE,
raw_string_ostream &Fmt) {
// Target of a scattered relocation is an address. In the interest of
// generating pretty output, scan through the symbol table looking for a
// symbol that aligns with that address. If we find one, print it.
// Otherwise, we just print the hex address of the target.
if (O->isRelocationScattered(RE)) {
uint32_t Val = O->getPlainRelocationSymbolNum(RE);
for (const SymbolRef &Symbol : O->symbols()) {
Expected<uint64_t> Addr = Symbol.getAddress();
if (!Addr)
report_error(O->getFileName(), Addr.takeError());
if (*Addr != Val)
continue;
Expected<StringRef> Name = Symbol.getName();
if (!Name)
report_error(O->getFileName(), Name.takeError());
Fmt << *Name;
return;
}
// If we couldn't find a symbol that this relocation refers to, try
// to find a section beginning instead.
for (const SectionRef &Section : ToolSectionFilter(*O)) {
std::error_code ec;
StringRef Name;
uint64_t Addr = Section.getAddress();
if (Addr != Val)
continue;
if ((ec = Section.getName(Name)))
report_error(O->getFileName(), ec);
Fmt << Name;
return;
}
Fmt << format("0x%x", Val);
return;
}
StringRef S;
bool isExtern = O->getPlainRelocationExternal(RE);
uint64_t Val = O->getPlainRelocationSymbolNum(RE);
if (O->getAnyRelocationType(RE) == MachO::ARM64_RELOC_ADDEND) {
Fmt << format("0x%0" PRIx64, Val);
return;
}
if (isExtern) {
symbol_iterator SI = O->symbol_begin();
advance(SI, Val);
Expected<StringRef> SOrErr = SI->getName();
if (!SOrErr)
report_error(O->getFileName(), SOrErr.takeError());
S = *SOrErr;
} else {
section_iterator SI = O->section_begin();
// Adjust for the fact that sections are 1-indexed.
if (Val == 0) {
Fmt << "0 (?,?)";
return;
}
uint32_t I = Val - 1;
while (I != 0 && SI != O->section_end()) {
--I;
advance(SI, 1);
}
if (SI == O->section_end())
Fmt << Val << " (?,?)";
else
SI->getName(S);
}
Fmt << S;
}
static std::error_code getRelocationValueString(const WasmObjectFile *Obj,
const RelocationRef &RelRef,
SmallVectorImpl<char> &Result) {
const wasm::WasmRelocation& Rel = Obj->getWasmRelocation(RelRef);
symbol_iterator SI = RelRef.getSymbol();
std::string FmtBuf;
raw_string_ostream Fmt(FmtBuf);
if (SI == Obj->symbol_end()) {
// Not all wasm relocations have symbols associated with them.
// In particular R_WEBASSEMBLY_TYPE_INDEX_LEB.
Fmt << Rel.Index;
} else {
Expected<StringRef> SymNameOrErr = SI->getName();
if (!SymNameOrErr)
return errorToErrorCode(SymNameOrErr.takeError());
StringRef SymName = *SymNameOrErr;
Result.append(SymName.begin(), SymName.end());
}
Fmt << (Rel.Addend < 0 ? "" : "+") << Rel.Addend;
Fmt.flush();
Result.append(FmtBuf.begin(), FmtBuf.end());
return std::error_code();
}
static std::error_code getRelocationValueString(const MachOObjectFile *Obj,
const RelocationRef &RelRef,
SmallVectorImpl<char> &Result) {
DataRefImpl Rel = RelRef.getRawDataRefImpl();
MachO::any_relocation_info RE = Obj->getRelocation(Rel);
unsigned Arch = Obj->getArch();
std::string FmtBuf;
raw_string_ostream Fmt(FmtBuf);
unsigned Type = Obj->getAnyRelocationType(RE);
bool IsPCRel = Obj->getAnyRelocationPCRel(RE);
// Determine any addends that should be displayed with the relocation.
// These require decoding the relocation type, which is triple-specific.
// X86_64 has entirely custom relocation types.
if (Arch == Triple::x86_64) {
switch (Type) {
case MachO::X86_64_RELOC_GOT_LOAD:
case MachO::X86_64_RELOC_GOT: {
printRelocationTargetName(Obj, RE, Fmt);
Fmt << "@GOT";
if (IsPCRel)
Fmt << "PCREL";
break;
}
case MachO::X86_64_RELOC_SUBTRACTOR: {
DataRefImpl RelNext = Rel;
Obj->moveRelocationNext(RelNext);
MachO::any_relocation_info RENext = Obj->getRelocation(RelNext);
// X86_64_RELOC_SUBTRACTOR must be followed by a relocation of type
// X86_64_RELOC_UNSIGNED.
// NOTE: Scattered relocations don't exist on x86_64.
unsigned RType = Obj->getAnyRelocationType(RENext);
if (RType != MachO::X86_64_RELOC_UNSIGNED)
report_error(Obj->getFileName(), "Expected X86_64_RELOC_UNSIGNED after "
"X86_64_RELOC_SUBTRACTOR.");
// The X86_64_RELOC_UNSIGNED contains the minuend symbol;
// X86_64_RELOC_SUBTRACTOR contains the subtrahend.
printRelocationTargetName(Obj, RENext, Fmt);
Fmt << "-";
printRelocationTargetName(Obj, RE, Fmt);
break;
}
case MachO::X86_64_RELOC_TLV:
printRelocationTargetName(Obj, RE, Fmt);
Fmt << "@TLV";
if (IsPCRel)
Fmt << "P";
break;
case MachO::X86_64_RELOC_SIGNED_1:
printRelocationTargetName(Obj, RE, Fmt);
Fmt << "-1";
break;
case MachO::X86_64_RELOC_SIGNED_2:
printRelocationTargetName(Obj, RE, Fmt);
Fmt << "-2";
break;
case MachO::X86_64_RELOC_SIGNED_4:
printRelocationTargetName(Obj, RE, Fmt);
Fmt << "-4";
break;
default:
printRelocationTargetName(Obj, RE, Fmt);
break;
}
// X86 and ARM share some relocation types in common.
} else if (Arch == Triple::x86 || Arch == Triple::arm ||
Arch == Triple::ppc) {
// Generic relocation types...
switch (Type) {
case MachO::GENERIC_RELOC_PAIR: // prints no info
return std::error_code();
case MachO::GENERIC_RELOC_SECTDIFF: {
DataRefImpl RelNext = Rel;
Obj->moveRelocationNext(RelNext);
MachO::any_relocation_info RENext = Obj->getRelocation(RelNext);
// X86 sect diff's must be followed by a relocation of type
// GENERIC_RELOC_PAIR.
unsigned RType = Obj->getAnyRelocationType(RENext);
if (RType != MachO::GENERIC_RELOC_PAIR)
report_error(Obj->getFileName(), "Expected GENERIC_RELOC_PAIR after "
"GENERIC_RELOC_SECTDIFF.");
printRelocationTargetName(Obj, RE, Fmt);
Fmt << "-";
printRelocationTargetName(Obj, RENext, Fmt);
break;
}
}
if (Arch == Triple::x86 || Arch == Triple::ppc) {
switch (Type) {
case MachO::GENERIC_RELOC_LOCAL_SECTDIFF: {
DataRefImpl RelNext = Rel;
Obj->moveRelocationNext(RelNext);
MachO::any_relocation_info RENext = Obj->getRelocation(RelNext);
// X86 sect diff's must be followed by a relocation of type
// GENERIC_RELOC_PAIR.
unsigned RType = Obj->getAnyRelocationType(RENext);
if (RType != MachO::GENERIC_RELOC_PAIR)
report_error(Obj->getFileName(), "Expected GENERIC_RELOC_PAIR after "
"GENERIC_RELOC_LOCAL_SECTDIFF.");
printRelocationTargetName(Obj, RE, Fmt);
Fmt << "-";
printRelocationTargetName(Obj, RENext, Fmt);
break;
}
case MachO::GENERIC_RELOC_TLV: {
printRelocationTargetName(Obj, RE, Fmt);
Fmt << "@TLV";
if (IsPCRel)
Fmt << "P";
break;
}
default:
printRelocationTargetName(Obj, RE, Fmt);
}
} else { // ARM-specific relocations
switch (Type) {
case MachO::ARM_RELOC_HALF:
case MachO::ARM_RELOC_HALF_SECTDIFF: {
// Half relocations steal a bit from the length field to encode
// whether this is an upper16 or a lower16 relocation.
bool isUpper = (Obj->getAnyRelocationLength(RE) & 0x1) == 1;
if (isUpper)
Fmt << ":upper16:(";
else
Fmt << ":lower16:(";
printRelocationTargetName(Obj, RE, Fmt);
DataRefImpl RelNext = Rel;
Obj->moveRelocationNext(RelNext);
MachO::any_relocation_info RENext = Obj->getRelocation(RelNext);
// ARM half relocs must be followed by a relocation of type
// ARM_RELOC_PAIR.
unsigned RType = Obj->getAnyRelocationType(RENext);
if (RType != MachO::ARM_RELOC_PAIR)
report_error(Obj->getFileName(), "Expected ARM_RELOC_PAIR after "
"ARM_RELOC_HALF");
// NOTE: The half of the target virtual address is stashed in the
// address field of the secondary relocation, but we can't reverse
// engineer the constant offset from it without decoding the movw/movt
// instruction to find the other half in its immediate field.
// ARM_RELOC_HALF_SECTDIFF encodes the second section in the
// symbol/section pointer of the follow-on relocation.
if (Type == MachO::ARM_RELOC_HALF_SECTDIFF) {
Fmt << "-";
printRelocationTargetName(Obj, RENext, Fmt);
}
Fmt << ")";
break;
}
default: { printRelocationTargetName(Obj, RE, Fmt); }
}
}
} else
printRelocationTargetName(Obj, RE, Fmt);
Fmt.flush();
Result.append(FmtBuf.begin(), FmtBuf.end());
return std::error_code();
}
static std::error_code getRelocationValueString(const RelocationRef &Rel,
SmallVectorImpl<char> &Result) {
const ObjectFile *Obj = Rel.getObject();
if (auto *ELF = dyn_cast<ELFObjectFileBase>(Obj))
return getRelocationValueString(ELF, Rel, Result);
if (auto *COFF = dyn_cast<COFFObjectFile>(Obj))
return getRelocationValueString(COFF, Rel, Result);
if (auto *Wasm = dyn_cast<WasmObjectFile>(Obj))
return getRelocationValueString(Wasm, Rel, Result);
if (auto *MachO = dyn_cast<MachOObjectFile>(Obj))
return getRelocationValueString(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, uint64_t 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
size_t BufferSize = Buffer->getBufferSize();
const char *BufferStart = Buffer->getBufferStart();
for (const char *Start = BufferStart, *End = BufferStart;
End < BufferStart + BufferSize; End++)
if (*End == '\n' || End == BufferStart + BufferSize - 1 ||
(*End == '\r' && *(End + 1) == '\n')) {
LineCache[LineInfo.FileName].push_back(StringRef(Start, End - Start));
if (*End == '\r')
End++;
Start = End + 1;
}
SourceCache[LineInfo.FileName] = std::move(Buffer);
return true;
}
void SourcePrinter::printSourceLine(raw_ostream &OS, uint64_t Address,
StringRef Delimiter) {
if (!Symbolizer)
return;
DILineInfo LineInfo = DILineInfo();
auto ExpectecLineInfo =
Symbolizer->symbolizeCode(Obj->getFileName(), Address);
if (!ExpectecLineInfo)
consumeError(ExpectecLineInfo.takeError());
else
LineInfo = *ExpectecLineInfo;
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 FileBuffer = SourceCache.find(LineInfo.FileName);
if (FileBuffer != SourceCache.end()) {
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].ltrim()
<< "\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));
}
class PrettyPrinter {
public:
virtual ~PrettyPrinter() = default;
virtual void printInst(MCInstPrinter &IP, const MCInst *MI,
ArrayRef<uint8_t> Bytes, uint64_t Address,
raw_ostream &OS, StringRef Annot,
MCSubtargetInfo const &STI, SourcePrinter *SP,
std::vector<RelocationRef> *Rels = nullptr) {
if (SP && (PrintSource || PrintLines))
SP->printSourceLine(OS, Address);
if (!NoLeadingAddr)
OS << format("%8" PRIx64 ":", Address);
if (!NoShowRawInsn) {
OS << "\t";
dumpBytes(Bytes, OS);
}
if (MI)
IP.printInst(MI, OS, "", STI);
else
OS << " <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("%08" PRIx32, opcode);
}
}
void printInst(MCInstPrinter &IP, const MCInst *MI, ArrayRef<uint8_t> Bytes,
uint64_t 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, 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 = "";
StringRef Fmt = "\t\t\t%08" PRIx64 ": ";
std::vector<RelocationRef>::const_iterator RelCur = Rels->begin();
std::vector<RelocationRef>::const_iterator RelEnd = Rels->end();
// Hexagon's packets require relocations to be inline rather than
// clustered at the end of the packet.
auto PrintReloc = [&]() -> void {
while ((RelCur != RelEnd) && (RelCur->getOffset() <= Address)) {
if (RelCur->getOffset() == Address) {
SmallString<16> Name;
SmallString<32> Val;
RelCur->getTypeName(Name);
error(getRelocationValueString(*RelCur, Val));
OS << Separator << format(Fmt.data(), Address) << Name << "\t" << Val
<< "\n";
return;
}
++RelCur;
}
};
while (!HeadTail.first.empty()) {
OS << Separator;
Separator = "\n";
if (SP && (PrintSource || PrintLines))
SP->printSourceLine(OS, Address, "");
printLead(Bytes, 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 += 4;
}
}
};
HexagonPrettyPrinter HexagonPrettyPrinterInst;
class AMDGCNPrettyPrinter : public PrettyPrinter {
public:
void printInst(MCInstPrinter &IP, const MCInst *MI, ArrayRef<uint8_t> Bytes,
uint64_t 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);
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,
uint64_t 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 / 8);
if (!NoShowRawInsn) {
OS << "\t";
dumpBytes(Bytes, OS);
}
if (MI)
IP.printInst(MI, OS, "", STI);
else
OS << " <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;
Expected<uint64_t> AddressOrErr = Symbol.getAddress();
if (!AddressOrErr)
report_error(Obj->getFileName(), AddressOrErr.takeError());
Expected<StringRef> Name = Symbol.getName();
if (!Name)
report_error(Obj->getFileName(), Name.takeError());
if (Name->empty())
continue;
Expected<section_iterator> SectionOrErr = Symbol.getSection();
if (!SectionOrErr)
report_error(Obj->getFileName(), SectionOrErr.takeError());
section_iterator SecI = *SectionOrErr;
if (SecI == Obj->section_end())
continue;
AllSymbols[*SecI].emplace_back(*AddressOrErr, *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);
Expected<StringRef> NameOrErr = Symbol.getName();
if (!NameOrErr)
report_error(Obj->getFileName(), NameOrErr.takeError());
if (NameOrErr->empty())
continue;
StringRef Name = Saver.save((*NameOrErr + "@plt").str());
AllSymbols[*Plt].emplace_back(PltEntry.second, Name, 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) {
// When -z or --disassemble-zeroes are given we always dissasemble them.
if (DisassembleZeroes)
return 0;
// 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;
}
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));
StringRef Fmt = Obj->getBytesInAddress() > 4 ? "\t\t%016" PRIx64 ": " :
"\t\t\t%08" PRIx64 ": ";
SourcePrinter SP(Obj, TheTarget->getName());
// Create a mapping, RelocSecs = SectionRelocMap[S], where sections
// in RelocSecs contain the relocations for section S.
std::error_code EC;
std::map<SectionRef, SmallVector<SectionRef, 1>> SectionRelocMap;
for (const SectionRef &Section : ToolSectionFilter(*Obj)) {
section_iterator Sec2 = Section.getRelocatedSection();
if (Sec2 != Obj->section_end())
SectionRelocMap[*Sec2].push_back(Section);
}
// 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;
for (const SymbolRef &Symbol : Obj->symbols()) {
Expected<uint64_t> AddressOrErr = Symbol.getAddress();
if (!AddressOrErr)
report_error(Obj->getFileName(), AddressOrErr.takeError());
uint64_t Address = *AddressOrErr;
Expected<StringRef> Name = Symbol.getName();
if (!Name)
report_error(Obj->getFileName(), Name.takeError());
if (Name->empty())
continue;
Expected<section_iterator> SectionOrErr = Symbol.getSection();
if (!SectionOrErr)
report_error(Obj->getFileName(), SectionOrErr.takeError());
uint8_t SymbolType = ELF::STT_NOTYPE;
if (Obj->isELF())
SymbolType = getElfSymbolType(Obj, Symbol);
section_iterator SecI = *SectionOrErr;
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 = std::upper_bound(
SectionAddresses.begin(), SectionAddresses.end(), VA,
[](uint64_t LHS, const std::pair<uint64_t, SectionRef> &RHS) {
return LHS < RHS.first;
});
if (Sec != SectionAddresses.begin())
--Sec;
else
Sec = SectionAddresses.end();
if (Sec != SectionAddresses.end())
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));
}
}
// Make a list of all the relocations for this section.
std::vector<RelocationRef> Rels;
if (InlineRelocs) {
for (const SectionRef &RelocSec : SectionRelocMap[Section]) {
for (const RelocationRef &Reloc : RelocSec.relocations()) {
Rels.push_back(Reloc);
}
}
}
// Sort relocations by address.
llvm::sort(Rels, isRelocAddressLess);
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);
StringRef BytesStr;
error(Section.getContents(BytesStr));
ArrayRef<uint8_t> Bytes(reinterpret_cast<const uint8_t *>(BytesStr.data()),
BytesStr.size());
uint64_t Size;
uint64_t Index;
bool PrintedSection = false;
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) {
uint64_t Start = std::get<0>(Symbols[SI]) - SectionAddr;
// The end is either the section end or the beginning of the next
// symbol.
uint64_t End = (SI == SE - 1)
? SectSize
: std::get<0>(Symbols[SI + 1]) - SectionAddr;
// Don't try to disassemble beyond the end of section contents.
if (End > SectSize)
End = SectSize;
// If this symbol has the same address as the next symbol, then skip it.
if (Start >= End)
continue;
// Check if we need to skip symbol
// Skip if the symbol's data is not between StartAddress and StopAddress
if (End + SectionAddr < StartAddress ||
Start + SectionAddr > StopAddress) {
continue;
}
/// Skip if user requested specific symbols and this is not in the list
if (!DisasmFuncsSet.empty() &&
!DisasmFuncsSet.count(std::get<1>(Symbols[SI])))
continue;
if (!PrintedSection) {
PrintedSection = true;
outs() << "Disassembly of section ";
if (!SegmentName.empty())
outs() << SegmentName << ",";
outs() << SectionName << ':';
}
// Stop disassembly at the stop address specified
if (End + SectionAddr > StopAddress)
End = StopAddress - SectionAddr;
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);
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
for (Index = Start; Index < End; Index += Size) {
MCInst Inst;
if (Index + SectionAddr < StartAddress ||
Index + SectionAddr > StopAddress) {
// skip byte by byte till StartAddress is reached
Size = 1;
continue;
}
// 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 (isArmElf(Obj) && std::get<2>(Symbols[SI]) != ELF::STT_OBJECT &&
!DisassembleAll) {
uint64_t Stride = 0;
auto DAI = std::lower_bound(DataMappingSymsAddr.begin(),
DataMappingSymsAddr.end(), Index);
if (DAI != DataMappingSymsAddr.end() && *DAI == Index) {
// Switch to data.
while (Index < End) {
outs() << format("%8" PRIx64 ":", SectionAddr + Index);
outs() << "\t";
if (Index + 4 <= End) {
Stride = 4;
dumpBytes(Bytes.slice(Index, 4), outs());
outs() << "\t.word\t";
uint32_t Data = 0;
if (Obj->isLittleEndian()) {
const auto Word =
reinterpret_cast<const support::ulittle32_t *>(
Bytes.data() + Index);
Data = *Word;
} else {
const auto Word = reinterpret_cast<const support::ubig32_t *>(
Bytes.data() + Index);
Data = *Word;
}
outs() << "0x" << format("%08" PRIx32, Data);
} else if (Index + 2 <= End) {
Stride = 2;
dumpBytes(Bytes.slice(Index, 2), outs());
outs() << "\t\t.short\t";
uint16_t Data = 0;
if (Obj->isLittleEndian()) {
const auto Short =
reinterpret_cast<const support::ulittle16_t *>(
Bytes.data() + Index);
Data = *Short;
} else {
const auto Short =
reinterpret_cast<const support::ubig16_t *>(Bytes.data() +
Index);
Data = *Short;
}
outs() << "0x" << format("%04" PRIx16, Data);
} else {
Stride = 1;
dumpBytes(Bytes.slice(Index, 1), outs());
outs() << "\t\t.byte\t";
outs() << "0x" << format("%02" PRIx8, Bytes.slice(Index, 1)[0]);
}
Index += Stride;
outs() << "\n";
auto TAI = std::lower_bound(TextMappingSymsAddr.begin(),
TextMappingSymsAddr.end(), Index);
if (TAI != TextMappingSymsAddr.end() && *TAI == Index)
break;
}
}
}
// 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()) {
// 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 = Start; Index < End; Index += 1) {
if (((SectionAddr + Index) < StartAddress) ||
((SectionAddr + Index) > StopAddress))
continue;
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 = 8 - 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;
}
}
}
if (Index >= End)
break;
if (size_t N =
countSkippableZeroBytes(Bytes.slice(Index, End - Index))) {
outs() << "\t\t..." << '\n';
Index += N;
if (Index >= End)
break;
}
// Disassemble a real instruction or a data when disassemble all is
// provided
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, 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 SectionAddress = std::upper_bound(
SectionAddresses.begin(), SectionAddresses.end(), Target,
[](uint64_t LHS,
const std::pair<uint64_t, SectionRef> &RHS) {
return LHS < RHS.first;
});
if (SectionAddress != SectionAddresses.begin()) {
--SectionAddress;
TargetSectionSymbols = &AllSymbols[SectionAddress->second];
} else {
TargetSectionSymbols = &AbsoluteSymbols;
}
}
// Find the first 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 = std::upper_bound(
TargetSectionSymbols->begin(), TargetSectionSymbols->end(),
Target, [](uint64_t LHS,
const std::tuple<uint64_t, StringRef, uint8_t> &RHS) {
return LHS < std::get<0>(RHS);
});
if (TargetSym == TargetSectionSymbols->begin()) {
TargetSectionSymbols = &AbsoluteSymbols;
TargetSym = std::upper_bound(
AbsoluteSymbols.begin(), AbsoluteSymbols.end(),
Target, [](uint64_t LHS,
const std::tuple<uint64_t, StringRef, uint8_t> &RHS) {
return LHS < 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 Addr = RelCur->getOffset();
SmallString<16> Name;
SmallString<32> Val;
// If this relocation is hidden, skip it.
if (getHidden(*RelCur) || ((SectionAddr + Addr) < StartAddress)) {
++RelCur;
continue;
}
// Stop when rel_cur's address is past the current instruction.
if (Addr >= Index + Size)
break;
RelCur->getTypeName(Name);
error(getRelocationValueString(*RelCur, Val));
outs() << format(Fmt.data(), SectionAddr + Addr) << Name << "\t"
<< Val << "\n";
++RelCur;
}
}
}
}
}
void llvm::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;
for (const SectionRef &Section : ToolSectionFilter(*Obj)) {
if (Section.relocation_begin() == Section.relocation_end())
continue;
StringRef SecName;
error(Section.getName(SecName));
outs() << "RELOCATION RECORDS FOR [" << SecName << "]:\n";
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 llvm::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) {
if (Section.relocation_begin() == Section.relocation_end())
continue;
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";
}
}
}
void llvm::printSectionHeaders(const ObjectFile *Obj) {
outs() << "Sections:\n"
"Idx Name Size Address Type\n";
for (const SectionRef &Section : ToolSectionFilter(*Obj)) {
StringRef Name;
error(Section.getName(Name));
uint64_t Address = Section.getAddress();
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" : ""));
outs() << format("%3d %-13s %08" PRIx64 " %016" PRIx64 " %s\n",
(unsigned)Section.getIndex(), Name.str().c_str(), Size,
Address, Type.c_str());
}
outs() << "\n";
}
void llvm::printSectionContents(const ObjectFile *Obj) {
std::error_code EC;
for (const SectionRef &Section : ToolSectionFilter(*Obj)) {
StringRef Name;
StringRef Contents;
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;
}
error(Section.getContents(Contents));
// 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 llvm::printSymbolTable(const ObjectFile *O, StringRef ArchiveName,
StringRef ArchitectureName) {
outs() << "SYMBOL TABLE:\n";
if (const COFFObjectFile *Coff = dyn_cast<const COFFObjectFile>(O)) {
printCOFFSymbolTable(Coff);
return;
}
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;
Expected<uint64_t> AddressOrError = Symbol.getAddress();
if (!AddressOrError)
report_error(ArchiveName, O->getFileName(), AddressOrError.takeError(),
ArchitectureName);
uint64_t Address = *AddressOrError;
if ((Address < StartAddress) || (Address > StopAddress))
continue;
Expected<SymbolRef::Type> TypeOrError = Symbol.getType();
if (!TypeOrError)
report_error(ArchiveName, O->getFileName(), TypeOrError.takeError(),
ArchitectureName);
SymbolRef::Type Type = *TypeOrError;
uint32_t Flags = Symbol.getFlags();
Expected<section_iterator> SectionOrErr = Symbol.getSection();
if (!SectionOrErr)
report_error(ArchiveName, O->getFileName(), SectionOrErr.takeError(),
ArchitectureName);
section_iterator Section = *SectionOrErr;
StringRef Name;
if (Type == SymbolRef::ST_Debug && Section != O->section_end()) {
Section->getName(Name);
} else {
Expected<StringRef> NameOrErr = Symbol.getName();
if (!NameOrErr)
report_error(ArchiveName, O->getFileName(), NameOrErr.takeError(),
ArchitectureName);
Name = *NameOrErr;
}
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;
}
outs() << '\t';
if (Common || isa<ELFObjectFileBase>(O)) {
uint64_t Val =
Common ? Symbol.getAlignment() : ELFSymbolRef(Symbol).getSize();
outs() << format("\t %08" PRIx64 " ", Val);
}
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";
}
void llvm::printExportsTrie(const ObjectFile *o) {
outs() << "Exports trie:\n";
if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachOExportsTrie(MachO);
else
WithColor::error(errs(), ToolName)
<< "This operation is only currently supported "
"for Mach-O executable files.\n";
}
void llvm::printRebaseTable(ObjectFile *o) {
outs() << "Rebase table:\n";
if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachORebaseTable(MachO);
else
WithColor::error(errs(), ToolName)
<< "This operation is only currently supported "
"for Mach-O executable files.\n";
}
void llvm::printBindTable(ObjectFile *o) {
outs() << "Bind table:\n";
if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachOBindTable(MachO);
else
WithColor::error(errs(), ToolName)
<< "This operation is only currently supported "
"for Mach-O executable files.\n";
}
void llvm::printLazyBindTable(ObjectFile *o) {
outs() << "Lazy bind table:\n";
if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachOLazyBindTable(MachO);
else
WithColor::error(errs(), ToolName)
<< "This operation is only currently supported "
"for Mach-O executable files.\n";
}
void llvm::printWeakBindTable(ObjectFile *o) {
outs() << "Weak bind table:\n";
if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachOWeakBindTable(MachO);
else
WithColor::error(errs(), ToolName)
<< "This operation is only currently supported "
"for Mach-O executable files.\n";
}
/// Dump the raw contents of the __clangast section so the output can be piped
/// into llvm-bcanalyzer.
void llvm::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;
error(ClangASTSection.getValue().getContents(ClangASTContents));
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;
error(FaultMapSection.getValue().getContents(FaultMapContents));
FaultMapParser FMP(FaultMapContents.bytes_begin(),
FaultMapContents.bytes_end());
outs() << FMP;
}
static void printPrivateFileHeaders(const ObjectFile *O, bool OnlyFirst) {
if (O->isELF()) {
printELFFileHeader(O);
return printELFDynamicSection(O);
}
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";
Expected<uint64_t> StartAddrOrErr = O->getStartAddress();
if (!StartAddrOrErr)
report_error(O->getFileName(), StartAddrOrErr.takeError());
StringRef Fmt = O->getBytesInAddress() > 4 ? "%016" PRIx64 : "%08" PRIx64;
uint64_t Address = StartAddrOrErr.get();
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() << " ";
Expected<unsigned> UIDOrErr = C.getUID();
if (!UIDOrErr)
report_error(Filename, UIDOrErr.takeError());
unsigned UID = UIDOrErr.get();
outs() << format("%d/", UID);
Expected<unsigned> GIDOrErr = C.getGID();
if (!GIDOrErr)
report_error(Filename, GIDOrErr.takeError());
unsigned GID = GIDOrErr.get();
outs() << format("%-d ", GID);
Expected<uint64_t> Size = C.getRawSize();
if (!Size)
report_error(Filename, Size.takeError());
outs() << format("%6" PRId64, Size.get()) << " ";
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());
Expected<StringRef> RawNameOrErr = C.getRawName();
if (!RawNameOrErr)
report_error(Filename, NameOrErr.takeError());
Name = RawNameOrErr.get();
} 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 (PrintFaultMaps)
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(A->getFileName(), C, std::move(E));
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(A->getFileName(), object_error::invalid_file_type);
}
if (Err)
report_error(A->getFileName(), std::move(Err));
}
/// 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.
Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(file);
if (!BinaryOrErr)
report_error(file, BinaryOrErr.takeError());
Binary &Binary = *BinaryOrErr.get().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(file, object_error::invalid_file_type);
}
int main(int argc, char **argv) {
InitLLVM X(argc, argv);
// Initialize targets and assembly printers/parsers.
llvm::InitializeAllTargetInfos();
llvm::InitializeAllTargetMCs();
llvm::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)
FileHeaders = PrivateHeaders = Relocations = SectionHeaders = SymbolTable =
true;
if (DisassembleAll || PrintSource || PrintLines)
Disassemble = true;
if (!Disassemble
&& !Relocations
&& !DynamicRelocations
&& !SectionHeaders
&& !SectionContents
&& !SymbolTable
&& !UnwindInfo
&& !PrivateHeaders
&& !FileHeaders
&& !FirstPrivateHeader
&& !ExportsTrie
&& !Rebase
&& !Bind
&& !LazyBind
&& !WeakBind
&& !RawClangAST
&& !(UniversalHeaders && MachOOpt)
&& !ArchiveHeaders
&& !(IndirectSymbols && MachOOpt)
&& !(DataInCode && MachOOpt)
&& !(LinkOptHints && MachOOpt)
&& !(InfoPlist && MachOOpt)
&& !(DylibsUsed && MachOOpt)
&& !(DylibId && MachOOpt)
&& !(ObjcMetaData && MachOOpt)
&& !(!FilterSections.empty() && MachOOpt)
&& !PrintFaultMaps
&& DwarfDumpType == DIDT_Null) {
cl::PrintHelpMessage();
return 2;
}
DisasmFuncsSet.insert(DisassembleFunctions.begin(),
DisassembleFunctions.end());
llvm::for_each(InputFilenames, dumpInput);
return EXIT_SUCCESS;
}