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llvm-mirror/tools/llvm-objdump/llvm-objdump.cpp
Kevin Enderby 8994e20f69 Reapply r250906 with many suggested updates from Rafael Espindola. 
The needed lld matching changes to be submitted immediately next,
but this revision will cause lld failures with this alone which is expected.

This removes the eating of the error in Archive::Child::getSize() when the characters
in the size field in the archive header for the member is not a number.  To do this we
have all of the needed methods return ErrorOr to push them up until we get out of lib.
Then the tools and can handle the error in whatever way is appropriate for that tool.

So the solution is to plumb all the ErrorOr stuff through everything that touches archives.
This include its iterators as one can create an Archive object but the first or any other
Child object may fail to be created due to a bad size field in its header.

Thanks to Lang Hames on the changes making child_iterator contain an
ErrorOr<Child> instead of a Child and the needed changes to ErrorOr.h to add
operator overloading for * and -> .

We don’t want to use llvm_unreachable() as it calls abort() and is produces a “crash”
and using report_fatal_error() to move the error checking will cause the program to
stop, neither of which are really correct in library code. There are still some uses of
these that should be cleaned up in this library code for other than the size field.

The test cases use archives with text files so one can see the non-digit character,
in this case a ‘%’, in the size field.

These changes will require corresponding changes to the lld project.  That will be
committed immediately after this change.  But this revision will cause lld failures
with this alone which is expected.

llvm-svn: 252192
2015-11-05 19:24:56 +00:00

1638 lines
53 KiB
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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/Triple.h"
#include "llvm/CodeGen/FaultMaps.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler.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/MCRelocationInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.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/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cctype>
#include <cstring>
#include <system_error>
using namespace llvm;
using namespace object;
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::Relocations("r", cl::desc("Display the relocation entries in the file"));
cl::opt<bool>
llvm::SectionContents("s", cl::desc("Display the content of each section"));
cl::opt<bool>
llvm::SymbolTable("t", cl::desc("Display the symbol table"));
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::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"));
static cl::alias
PrivateHeadersShort("p", cl::desc("Alias for --private-headers"),
cl::aliasopt(PrivateHeaders));
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"));
static StringRef ToolName;
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(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(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 std::find(FilterSections.begin(),
FilterSections.end(),
String) != FilterSections.end();
},
O);
}
}
void llvm::error(std::error_code EC) {
if (!EC)
return;
outs() << ToolName << ": error reading file: " << EC.message() << ".\n";
outs().flush();
exit(1);
}
static void report_error(StringRef File, std::error_code EC) {
assert(EC);
errs() << ToolName << ": '" << File << "': " << EC.message() << ".\n";
exit(1);
}
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.setArch(Triple::ArchType(Obj->getArch()));
// TheTriple defaults to ELF, and COFF doesn't have an environment:
// the best we can do here is indicate that it is mach-o.
if (Obj->isMachO())
TheTriple.setObjectFormat(Triple::MachO);
if (Obj->isCOFF()) {
const auto COFFObj = dyn_cast<COFFObjectFile>(Obj);
if (COFFObj->getArch() == Triple::thumb)
TheTriple.setTriple("thumbv7-windows");
}
}
} else
TheTriple.setTriple(Triple::normalize(TripleName));
// Get the target specific parser.
std::string Error;
const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple,
Error);
if (!TheTarget) {
errs() << ToolName << ": " << Error;
return nullptr;
}
// Update the triple name and return the found target.
TripleName = TheTriple.getTriple();
return TheTarget;
}
bool llvm::RelocAddressLess(RelocationRef a, RelocationRef b) {
return a.getOffset() < b.getOffset();
}
namespace {
class PrettyPrinter {
public:
virtual ~PrettyPrinter(){}
virtual void printInst(MCInstPrinter &IP, const MCInst *MI,
ArrayRef<uint8_t> Bytes, uint64_t Address,
raw_ostream &OS, StringRef Annot,
MCSubtargetInfo const &STI) {
outs() << format("%8" PRIx64 ":", Address);
if (!NoShowRawInsn) {
outs() << "\t";
dumpBytes(Bytes, outs());
}
IP.printInst(MI, outs(), "", STI);
}
};
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];
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) override {
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 = "";
while(!HeadTail.first.empty()) {
OS << Separator;
Separator = "\n";
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;
Bytes = Bytes.slice(4);
Address += 4;
HeadTail = HeadTail.second.split('\n');
}
OS << " } " << PacketBundle.second;
}
};
HexagonPrettyPrinter HexagonPrettyPrinterInst;
PrettyPrinter &selectPrettyPrinter(Triple const &Triple) {
switch(Triple.getArch()) {
default:
return PrettyPrinterInst;
case Triple::hexagon:
return HexagonPrettyPrinterInst;
}
}
}
template <class ELFT>
static std::error_code getRelocationValueString(const ELFObjectFile<ELFT> *Obj,
const RelocationRef &RelRef,
SmallVectorImpl<char> &Result) {
DataRefImpl Rel = RelRef.getRawDataRefImpl();
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();
ErrorOr<const Elf_Shdr *> SecOrErr = EF.getSection(Rel.d.a);
if (std::error_code EC = SecOrErr.getError())
return EC;
const Elf_Shdr *Sec = *SecOrErr;
ErrorOr<const Elf_Shdr *> SymTabOrErr = EF.getSection(Sec->sh_link);
if (std::error_code EC = SymTabOrErr.getError())
return EC;
const Elf_Shdr *SymTab = *SymTabOrErr;
assert(SymTab->sh_type == ELF::SHT_SYMTAB ||
SymTab->sh_type == ELF::SHT_DYNSYM);
ErrorOr<const Elf_Shdr *> StrTabSec = EF.getSection(SymTab->sh_link);
if (std::error_code EC = StrTabSec.getError())
return EC;
ErrorOr<StringRef> StrTabOrErr = EF.getStringTable(*StrTabSec);
if (std::error_code EC = StrTabOrErr.getError())
return EC;
StringRef StrTab = *StrTabOrErr;
uint8_t type = RelRef.getType();
StringRef res;
int64_t addend = 0;
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;
break;
}
}
symbol_iterator SI = RelRef.getSymbol();
const Elf_Sym *symb = Obj->getSymbol(SI->getRawDataRefImpl());
StringRef Target;
if (symb->getType() == ELF::STT_SECTION) {
ErrorOr<section_iterator> SymSI = SI->getSection();
if (std::error_code EC = SymSI.getError())
return EC;
const Elf_Shdr *SymSec = Obj->getSection((*SymSI)->getRawDataRefImpl());
ErrorOr<StringRef> SecName = EF.getSectionName(SymSec);
if (std::error_code EC = SecName.getError())
return EC;
Target = *SecName;
} else {
ErrorOr<StringRef> SymName = symb->getName(StrTab);
if (!SymName)
return SymName.getError();
Target = *SymName;
}
switch (EF.getHeader()->e_machine) {
case ELF::EM_X86_64:
switch (type) {
case ELF::R_X86_64_PC8:
case ELF::R_X86_64_PC16:
case ELF::R_X86_64_PC32: {
std::string fmtbuf;
raw_string_ostream fmt(fmtbuf);
fmt << Target << (addend < 0 ? "" : "+") << addend << "-P";
fmt.flush();
Result.append(fmtbuf.begin(), fmtbuf.end());
} break;
case ELF::R_X86_64_8:
case ELF::R_X86_64_16:
case ELF::R_X86_64_32:
case ELF::R_X86_64_32S:
case ELF::R_X86_64_64: {
std::string fmtbuf;
raw_string_ostream fmt(fmtbuf);
fmt << Target << (addend < 0 ? "" : "+") << addend;
fmt.flush();
Result.append(fmtbuf.begin(), fmtbuf.end());
} break;
default:
res = "Unknown";
}
break;
case ELF::EM_AARCH64: {
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());
break;
}
case ELF::EM_386:
case ELF::EM_IAMCU:
case ELF::EM_ARM:
case ELF::EM_HEXAGON:
case ELF::EM_MIPS:
res = Target;
break;
default:
res = "Unknown";
}
if (Result.empty())
Result.append(res.begin(), res.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();
ErrorOr<StringRef> SymNameOrErr = SymI->getName();
if (std::error_code EC = SymNameOrErr.getError())
return EC;
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) {
bool IsScattered = O->isRelocationScattered(RE);
// 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 (IsScattered) {
uint32_t Val = O->getPlainRelocationSymbolNum(RE);
for (const SymbolRef &Symbol : O->symbols()) {
std::error_code ec;
ErrorOr<uint64_t> Addr = Symbol.getAddress();
if ((ec = Addr.getError()))
report_fatal_error(ec.message());
if (*Addr != Val)
continue;
ErrorOr<StringRef> Name = Symbol.getName();
if (std::error_code EC = Name.getError())
report_fatal_error(EC.message());
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_fatal_error(ec.message());
fmt << Name;
return;
}
fmt << format("0x%x", Val);
return;
}
StringRef S;
bool isExtern = O->getPlainRelocationExternal(RE);
uint64_t Val = O->getPlainRelocationSymbolNum(RE);
if (isExtern) {
symbol_iterator SI = O->symbol_begin();
advance(SI, Val);
ErrorOr<StringRef> SOrErr = SI->getName();
error(SOrErr.getError());
S = *SOrErr;
} else {
section_iterator SI = O->section_begin();
// Adjust for the fact that sections are 1-indexed.
advance(SI, Val - 1);
SI->getName(S);
}
fmt << S;
}
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) {
bool isPCRel = Obj->getAnyRelocationPCRel(RE);
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_fatal_error("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_fatal_error("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_fatal_error("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) >> 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_fatal_error("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);
auto *MachO = cast<MachOObjectFile>(Obj);
return getRelocationValueString(MachO, Rel, Result);
}
/// @brief 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) {
const ObjectFile *Obj = RelRef.getObject();
auto *MachO = dyn_cast<MachOObjectFile>(Obj);
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) {
if (Type == MachO::GENERIC_RELOC_PAIR)
return true;
} else 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;
}
static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
const Target *TheTarget = getTarget(Obj);
// getTarget() will have already issued a diagnostic if necessary, so
// just bail here if it failed.
if (!TheTarget)
return;
// Package up features to be passed to target/subtarget
std::string FeaturesStr;
if (MAttrs.size()) {
SubtargetFeatures Features;
for (unsigned i = 0; i != MAttrs.size(); ++i)
Features.AddFeature(MAttrs[i]);
FeaturesStr = Features.getString();
}
std::unique_ptr<const MCRegisterInfo> MRI(
TheTarget->createMCRegInfo(TripleName));
if (!MRI) {
errs() << "error: no register info for target " << TripleName << "\n";
return;
}
// Set up disassembler.
std::unique_ptr<const MCAsmInfo> AsmInfo(
TheTarget->createMCAsmInfo(*MRI, TripleName));
if (!AsmInfo) {
errs() << "error: no assembly info for target " << TripleName << "\n";
return;
}
std::unique_ptr<const MCSubtargetInfo> STI(
TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr));
if (!STI) {
errs() << "error: no subtarget info for target " << TripleName << "\n";
return;
}
std::unique_ptr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo());
if (!MII) {
errs() << "error: no instruction info for target " << TripleName << "\n";
return;
}
std::unique_ptr<const MCObjectFileInfo> MOFI(new MCObjectFileInfo);
MCContext Ctx(AsmInfo.get(), MRI.get(), MOFI.get());
std::unique_ptr<MCDisassembler> DisAsm(
TheTarget->createMCDisassembler(*STI, Ctx));
if (!DisAsm) {
errs() << "error: no disassembler for target " << TripleName << "\n";
return;
}
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) {
errs() << "error: no instruction printer for target " << TripleName
<< '\n';
return;
}
IP->setPrintImmHex(PrintImmHex);
PrettyPrinter &PIP = selectPrettyPrinter(Triple(TripleName));
StringRef Fmt = Obj->getBytesInAddress() > 4 ? "\t\t%016" PRIx64 ": " :
"\t\t\t%08" PRIx64 ": ";
// 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 target of a call.
std::vector<std::pair<uint64_t, StringRef>> AllSymbols;
if (MIA) {
for (const SymbolRef &Symbol : Obj->symbols()) {
if (Symbol.getType() != SymbolRef::ST_Function)
continue;
ErrorOr<uint64_t> AddressOrErr = Symbol.getAddress();
error(AddressOrErr.getError());
uint64_t Address = *AddressOrErr;
ErrorOr<StringRef> Name = Symbol.getName();
error(Name.getError());
if (Name->empty())
continue;
AllSymbols.push_back(std::make_pair(Address, *Name));
}
array_pod_sort(AllSymbols.begin(), AllSymbols.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;
// Make a list of all the symbols in this section.
std::vector<std::pair<uint64_t, StringRef>> Symbols;
std::vector<uint64_t> DataMappingSymsAddr;
std::vector<uint64_t> TextMappingSymsAddr;
for (const SymbolRef &Symbol : Obj->symbols()) {
if (Section.containsSymbol(Symbol)) {
ErrorOr<uint64_t> AddressOrErr = Symbol.getAddress();
error(AddressOrErr.getError());
uint64_t Address = *AddressOrErr;
Address -= SectionAddr;
if (Address >= SectSize)
continue;
ErrorOr<StringRef> Name = Symbol.getName();
error(Name.getError());
Symbols.push_back(std::make_pair(Address, *Name));
if (Obj->isELF() && Obj->getArch() == Triple::aarch64) {
if (Name->startswith("$d"))
DataMappingSymsAddr.push_back(Address);
if (Name->startswith("$x"))
TextMappingSymsAddr.push_back(Address);
}
}
}
// Sort the symbols by address, just in case they didn't come in that way.
array_pod_sort(Symbols.begin(), Symbols.end());
std::sort(DataMappingSymsAddr.begin(), DataMappingSymsAddr.end());
std::sort(TextMappingSymsAddr.begin(), TextMappingSymsAddr.end());
// 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.
std::sort(Rels.begin(), Rels.end(), RelocAddressLess);
StringRef SegmentName = "";
if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(Obj)) {
DataRefImpl DR = Section.getRawDataRefImpl();
SegmentName = MachO->getSectionFinalSegmentName(DR);
}
StringRef name;
error(Section.getName(name));
outs() << "Disassembly of section ";
if (!SegmentName.empty())
outs() << SegmentName << ",";
outs() << name << ':';
// If the section has no symbol at the start, just insert a dummy one.
if (Symbols.empty() || Symbols[0].first != 0)
Symbols.insert(Symbols.begin(), std::make_pair(0, name));
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;
std::vector<RelocationRef>::const_iterator rel_cur = Rels.begin();
std::vector<RelocationRef>::const_iterator rel_end = Rels.end();
// Disassemble symbol by symbol.
for (unsigned si = 0, se = Symbols.size(); si != se; ++si) {
uint64_t Start = Symbols[si].first;
// The end is either the section end or the beginning of the next symbol.
uint64_t End = (si == se - 1) ? SectSize : Symbols[si + 1].first;
// If this symbol has the same address as the next symbol, then skip it.
if (Start == End)
continue;
outs() << '\n' << Symbols[si].second << ":\n";
#ifndef NDEBUG
raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
#else
raw_ostream &DebugOut = nulls();
#endif
for (Index = Start; Index < End; Index += Size) {
MCInst Inst;
// 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 (Obj->isELF() && Obj->getArch() == Triple::aarch64) {
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";
} else if (Index + 2 <= End) {
Stride = 2;
dumpBytes(Bytes.slice(Index, 2), outs());
outs() << "\t.short";
} else {
Stride = 1;
dumpBytes(Bytes.slice(Index, 1), outs());
outs() << "\t.byte";
}
Index += Stride;
outs() << "\n";
auto TAI = std::lower_bound(TextMappingSymsAddr.begin(),
TextMappingSymsAddr.end(), Index);
if (TAI != TextMappingSymsAddr.end() && *TAI == Index)
break;
}
}
}
if (Index >= End)
break;
if (DisAsm->getInstruction(Inst, Size, Bytes.slice(Index),
SectionAddr + Index, DebugOut,
CommentStream)) {
PIP.printInst(*IP, &Inst,
Bytes.slice(Index, Size),
SectionAddr + Index, outs(), "", *STI);
outs() << CommentStream.str();
Comments.clear();
if (MIA && (MIA->isCall(Inst) || MIA->isUnconditionalBranch(Inst) ||
MIA->isConditionalBranch(Inst))) {
uint64_t Target;
if (MIA->evaluateBranch(Inst, SectionAddr + Index, Size, Target)) {
auto TargetSym = std::upper_bound(
AllSymbols.begin(), AllSymbols.end(), Target,
[](uint64_t LHS, const std::pair<uint64_t, StringRef> &RHS) {
return LHS < RHS.first;
});
if (TargetSym != AllSymbols.begin())
--TargetSym;
else
TargetSym = AllSymbols.end();
if (TargetSym != AllSymbols.end()) {
outs() << " <" << TargetSym->second;
uint64_t Disp = Target - TargetSym->first;
if (Disp)
outs() << '+' << utohexstr(Disp);
outs() << '>';
}
}
}
outs() << "\n";
} else {
errs() << ToolName << ": warning: invalid instruction encoding\n";
if (Size == 0)
Size = 1; // skip illegible bytes
}
// Print relocation for instruction.
while (rel_cur != rel_end) {
bool hidden = getHidden(*rel_cur);
uint64_t addr = rel_cur->getOffset();
SmallString<16> name;
SmallString<32> val;
// If this relocation is hidden, skip it.
if (hidden) goto skip_print_rel;
// Stop when rel_cur's address is past the current instruction.
if (addr >= Index + Size) break;
rel_cur->getTypeName(name);
error(getRelocationValueString(*rel_cur, val));
outs() << format(Fmt.data(), SectionAddr + addr) << name
<< "\t" << val << "\n";
skip_print_rel:
++rel_cur;
}
}
}
}
}
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()) {
bool hidden = getHidden(Reloc);
uint64_t address = Reloc.getOffset();
SmallString<32> relocname;
SmallString<32> valuestr;
if (hidden)
continue;
Reloc.getTypeName(relocname);
error(getRelocationValueString(Reloc, valuestr));
outs() << format(Fmt.data(), address) << " " << relocname << " "
<< valuestr << "\n";
}
outs() << "\n";
}
}
void llvm::PrintSectionHeaders(const ObjectFile *Obj) {
outs() << "Sections:\n"
"Idx Name Size Address Type\n";
unsigned i = 0;
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", i,
Name.str().c_str(), Size, Address, Type.c_str());
++i;
}
}
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 (std::isprint(static_cast<unsigned char>(Contents[addr + i]) & 0xFF))
outs() << Contents[addr + i];
else
outs() << ".";
}
outs() << "\n";
}
}
}
static void PrintCOFFSymbolTable(const COFFObjectFile *coff) {
for (unsigned SI = 0, SE = coff->getNumberOfSymbols(); SI != SE; ++SI) {
ErrorOr<COFFSymbolRef> Symbol = coff->getSymbol(SI);
StringRef Name;
error(Symbol.getError());
error(coff->getSymbolName(*Symbol, Name));
outs() << "[" << format("%2d", SI) << "]"
<< "(sec " << format("%2d", int(Symbol->getSectionNumber())) << ")"
<< "(fl 0x00)" // Flag bits, which COFF doesn't have.
<< "(ty " << format("%3x", unsigned(Symbol->getType())) << ")"
<< "(scl " << format("%3x", unsigned(Symbol->getStorageClass())) << ") "
<< "(nx " << unsigned(Symbol->getNumberOfAuxSymbols()) << ") "
<< "0x" << format("%08x", unsigned(Symbol->getValue())) << " "
<< Name << "\n";
for (unsigned AI = 0, AE = Symbol->getNumberOfAuxSymbols(); AI < AE; ++AI, ++SI) {
if (Symbol->isSectionDefinition()) {
const coff_aux_section_definition *asd;
error(coff->getAuxSymbol<coff_aux_section_definition>(SI + 1, asd));
int32_t AuxNumber = asd->getNumber(Symbol->isBigObj());
outs() << "AUX "
<< format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x "
, unsigned(asd->Length)
, unsigned(asd->NumberOfRelocations)
, unsigned(asd->NumberOfLinenumbers)
, unsigned(asd->CheckSum))
<< format("assoc %d comdat %d\n"
, unsigned(AuxNumber)
, unsigned(asd->Selection));
} else if (Symbol->isFileRecord()) {
const char *FileName;
error(coff->getAuxSymbol<char>(SI + 1, FileName));
StringRef Name(FileName, Symbol->getNumberOfAuxSymbols() *
coff->getSymbolTableEntrySize());
outs() << "AUX " << Name.rtrim(StringRef("\0", 1)) << '\n';
SI = SI + Symbol->getNumberOfAuxSymbols();
break;
} else {
outs() << "AUX Unknown\n";
}
}
}
}
void llvm::PrintSymbolTable(const ObjectFile *o) {
outs() << "SYMBOL TABLE:\n";
if (const COFFObjectFile *coff = dyn_cast<const COFFObjectFile>(o)) {
PrintCOFFSymbolTable(coff);
return;
}
for (const SymbolRef &Symbol : o->symbols()) {
ErrorOr<uint64_t> AddressOrError = Symbol.getAddress();
error(AddressOrError.getError());
uint64_t Address = *AddressOrError;
SymbolRef::Type Type = Symbol.getType();
uint32_t Flags = Symbol.getFlags();
ErrorOr<section_iterator> SectionOrErr = Symbol.getSection();
error(SectionOrErr.getError());
section_iterator Section = *SectionOrErr;
StringRef Name;
if (Type == SymbolRef::ST_Debug && Section != o->section_end()) {
Section->getName(Name);
} else {
ErrorOr<StringRef> NameOrErr = Symbol.getName();
error(NameOrErr.getError());
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';
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 ";
}
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.
errs() << "This operation is only currently supported "
"for COFF and MachO object files.\n";
return;
}
}
void llvm::printExportsTrie(const ObjectFile *o) {
outs() << "Exports trie:\n";
if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachOExportsTrie(MachO);
else {
errs() << "This operation is only currently supported "
"for Mach-O executable files.\n";
return;
}
}
void llvm::printRebaseTable(const ObjectFile *o) {
outs() << "Rebase table:\n";
if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachORebaseTable(MachO);
else {
errs() << "This operation is only currently supported "
"for Mach-O executable files.\n";
return;
}
}
void llvm::printBindTable(const ObjectFile *o) {
outs() << "Bind table:\n";
if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachOBindTable(MachO);
else {
errs() << "This operation is only currently supported "
"for Mach-O executable files.\n";
return;
}
}
void llvm::printLazyBindTable(const ObjectFile *o) {
outs() << "Lazy bind table:\n";
if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachOLazyBindTable(MachO);
else {
errs() << "This operation is only currently supported "
"for Mach-O executable files.\n";
return;
}
}
void llvm::printWeakBindTable(const ObjectFile *o) {
outs() << "Weak bind table:\n";
if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
printMachOWeakBindTable(MachO);
else {
errs() << "This operation is only currently supported "
"for Mach-O executable files.\n";
return;
}
}
/// 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()) {
errs() << "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) {
const char *FaultMapSectionName = nullptr;
if (isa<ELFObjectFileBase>(Obj)) {
FaultMapSectionName = ".llvm_faultmaps";
} else if (isa<MachOObjectFile>(Obj)) {
FaultMapSectionName = "__llvm_faultmaps";
} else {
errs() << "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 printPrivateFileHeader(const ObjectFile *o) {
if (o->isELF()) {
printELFFileHeader(o);
} else if (o->isCOFF()) {
printCOFFFileHeader(o);
} else if (o->isMachO()) {
printMachOFileHeader(o);
}
}
static void DumpObject(const ObjectFile *o) {
// Avoid other output when using a raw option.
if (!RawClangAST) {
outs() << '\n';
outs() << o->getFileName()
<< ":\tfile format " << o->getFileFormatName() << "\n\n";
}
if (Disassemble)
DisassembleObject(o, Relocations);
if (Relocations && !Disassemble)
PrintRelocations(o);
if (SectionHeaders)
PrintSectionHeaders(o);
if (SectionContents)
PrintSectionContents(o);
if (SymbolTable)
PrintSymbolTable(o);
if (UnwindInfo)
PrintUnwindInfo(o);
if (PrivateHeaders)
printPrivateFileHeader(o);
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);
}
/// @brief Dump each object file in \a a;
static void DumpArchive(const Archive *a) {
for (auto &ErrorOrChild : a->children()) {
if (std::error_code EC = ErrorOrChild.getError())
report_error(a->getFileName(), EC);
const Archive::Child &C = *ErrorOrChild;
ErrorOr<std::unique_ptr<Binary>> ChildOrErr = C.getAsBinary();
if (std::error_code EC = ChildOrErr.getError())
if (EC != object_error::invalid_file_type)
report_error(a->getFileName(), EC);
if (ObjectFile *o = dyn_cast<ObjectFile>(&*ChildOrErr.get()))
DumpObject(o);
else
report_error(a->getFileName(), object_error::invalid_file_type);
}
}
/// @brief 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.
ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(file);
if (std::error_code EC = BinaryOrErr.getError())
report_error(file, EC);
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
report_error(file, object_error::invalid_file_type);
}
int main(int argc, char **argv) {
// Print a stack trace if we signal out.
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
// 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");
TripleName = Triple::normalize(TripleName);
ToolName = argv[0];
// Defaults to a.out if no filenames specified.
if (InputFilenames.size() == 0)
InputFilenames.push_back("a.out");
if (DisassembleAll)
Disassemble = true;
if (!Disassemble
&& !Relocations
&& !SectionHeaders
&& !SectionContents
&& !SymbolTable
&& !UnwindInfo
&& !PrivateHeaders
&& !ExportsTrie
&& !Rebase
&& !Bind
&& !LazyBind
&& !WeakBind
&& !RawClangAST
&& !(UniversalHeaders && MachOOpt)
&& !(ArchiveHeaders && MachOOpt)
&& !(IndirectSymbols && MachOOpt)
&& !(DataInCode && MachOOpt)
&& !(LinkOptHints && MachOOpt)
&& !(InfoPlist && MachOOpt)
&& !(DylibsUsed && MachOOpt)
&& !(DylibId && MachOOpt)
&& !(ObjcMetaData && MachOOpt)
&& !(FilterSections.size() != 0 && MachOOpt)
&& !PrintFaultMaps) {
cl::PrintHelpMessage();
return 2;
}
std::for_each(InputFilenames.begin(), InputFilenames.end(),
DumpInput);
return EXIT_SUCCESS;
}
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