| //===-- 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")); |
| |
| 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::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; |
| |
| errs() << ToolName << ": error reading file: " << EC.message() << ".\n"; |
| errs().flush(); |
| exit(1); |
| } |
| |
| LLVM_ATTRIBUTE_NORETURN void llvm::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) |
| report_fatal_error("can't find target: " + Error); |
| |
| // 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; |
| case ELF::EM_WEBASSEMBLY: |
| switch (type) { |
| case ELF::R_WEBASSEMBLY_DATA: { |
| std::string fmtbuf; |
| raw_string_ostream fmt(fmtbuf); |
| fmt << Target << (addend < 0 ? "" : "+") << addend; |
| fmt.flush(); |
| Result.append(fmtbuf.begin(), fmtbuf.end()); |
| break; |
| } |
| case ELF::R_WEBASSEMBLY_FUNCTION: |
| res = Target; |
| break; |
| default: |
| res = "Unknown"; |
| } |
| 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); |
| |
| // 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) |
| report_fatal_error("error: no register info for target " + TripleName); |
| |
| // Set up disassembler. |
| std::unique_ptr<const MCAsmInfo> AsmInfo( |
| TheTarget->createMCAsmInfo(*MRI, TripleName)); |
| if (!AsmInfo) |
| report_fatal_error("error: no assembly info for target " + TripleName); |
| std::unique_ptr<const MCSubtargetInfo> STI( |
| TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr)); |
| if (!STI) |
| report_fatal_error("error: no subtarget info for target " + TripleName); |
| std::unique_ptr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo()); |
| if (!MII) |
| report_fatal_error("error: no instruction info for target " + TripleName); |
| 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) |
| report_fatal_error("error: 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_fatal_error("error: 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 ": "; |
| |
| // 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. |
| typedef std::vector<std::pair<uint64_t, StringRef>> SectionSymbolsTy; |
| std::map<SectionRef, SectionSymbolsTy> AllSymbols; |
| for (const SymbolRef &Symbol : Obj->symbols()) { |
| 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; |
| |
| ErrorOr<section_iterator> SectionOrErr = Symbol.getSection(); |
| error(SectionOrErr.getError()); |
| section_iterator SecI = *SectionOrErr; |
| if (SecI == Obj->section_end()) |
| continue; |
| |
| AllSymbols[*SecI].emplace_back(Address, *Name); |
| } |
| |
| // 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); |
| } |
| } |
| |
| // 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()); |
| |
| 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 (Obj->isELF() && Obj->getArch() == Triple::aarch64) { |
| for (const auto &Symb : Symbols) { |
| uint64_t Address = Symb.first; |
| StringRef Name = Symb.second; |
| if (Name.startswith("$d")) |
| DataMappingSymsAddr.push_back(Address - SectionAddr); |
| if (Name.startswith("$x")) |
| TextMappingSymsAddr.push_back(Address - SectionAddr); |
| } |
| } |
| |
| 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(SectionAddr, 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 - SectionAddr; |
| // 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 - 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; |
| |
| 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(); |
| |
| // 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 = nullptr; |
| } |
| } |
| |
| // Find the first symbol in the section whose offset is less than |
| // or equal to the target. |
| if (TargetSectionSymbols) { |
| auto TargetSym = std::upper_bound( |
| TargetSectionSymbols->begin(), TargetSectionSymbols->end(), |
| Target, [](uint64_t LHS, |
| const std::pair<uint64_t, StringRef> &RHS) { |
| return LHS < RHS.first; |
| }); |
| 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() << '+' << 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"; |
| } |
| } |
| } |
| |
| 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 printPrivateFileHeaders(const ObjectFile *o) { |
| if (o->isELF()) |
| printELFFileHeader(o); |
| else if (o->isCOFF()) |
| printCOFFFileHeader(o); |
| else if (o->isMachO()) { |
| printMachOFileHeader(o); |
| printMachOLoadCommands(o); |
| } else |
| report_fatal_error("Invalid/Unsupported object file format"); |
| } |
| |
| static void printFirstPrivateFileHeader(const ObjectFile *o) { |
| if (o->isELF()) |
| printELFFileHeader(o); |
| else if (o->isCOFF()) |
| printCOFFFileHeader(o); |
| else if (o->isMachO()) |
| printMachOFileHeader(o); |
| else |
| report_fatal_error("Invalid/Unsupported object file format"); |
| } |
| |
| 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) |
| printPrivateFileHeaders(o); |
| if (FirstPrivateHeader) |
| printFirstPrivateFileHeader(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 |
| && !FirstPrivateHeader |
| && !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; |
| } |
