X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fllvm-objdump%2FMachODump.cpp;h=9a0255d428bfc8dc01a230d3b4372e63b00a41fe;hb=1de0e80e97d1a8e26414171772bc760f51ae6413;hp=139311ade21c3848f373806debc4c63afcbf2234;hpb=3ab3a82f728e1c10602ab86f0c489351233f9224;p=oota-llvm.git diff --git a/tools/llvm-objdump/MachODump.cpp b/tools/llvm-objdump/MachODump.cpp index 139311ade21..9a0255d428b 100644 --- a/tools/llvm-objdump/MachODump.cpp +++ b/tools/llvm-objdump/MachODump.cpp @@ -12,27 +12,31 @@ //===----------------------------------------------------------------------===// #include "llvm-objdump.h" +#include "llvm-c/Disassembler.h" #include "llvm/ADT/STLExtras.h" #include "llvm/ADT/StringExtras.h" #include "llvm/ADT/Triple.h" -#include "llvm/DebugInfo/DIContext.h" +#include "llvm/Config/config.h" +#include "llvm/DebugInfo/DWARF/DIContext.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/MCInstrDesc.h" #include "llvm/MC/MCInstrInfo.h" #include "llvm/MC/MCRegisterInfo.h" #include "llvm/MC/MCSubtargetInfo.h" #include "llvm/Object/MachO.h" +#include "llvm/Object/MachOUniversal.h" #include "llvm/Support/Casting.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" #include "llvm/Support/Endian.h" #include "llvm/Support/Format.h" +#include "llvm/Support/FormattedStream.h" #include "llvm/Support/GraphWriter.h" +#include "llvm/Support/LEB128.h" #include "llvm/Support/MachO.h" #include "llvm/Support/MemoryBuffer.h" #include "llvm/Support/TargetRegistry.h" @@ -41,14 +45,61 @@ #include #include #include + +#if HAVE_CXXABI_H +#include +#endif + using namespace llvm; using namespace object; static cl::opt - UseDbg("g", cl::desc("Print line information from debug info if available")); + UseDbg("g", + cl::desc("Print line information from debug info if available")); + +static cl::opt DSYMFile("dsym", + cl::desc("Use .dSYM file for debug info")); -static cl::opt - DSYMFile("dsym", cl::desc("Use .dSYM file for debug info")); +static cl::opt FullLeadingAddr("full-leading-addr", + cl::desc("Print full leading address")); + +static cl::opt + PrintImmHex("print-imm-hex", + cl::desc("Use hex format for immediate values")); + +cl::opt llvm::UniversalHeaders("universal-headers", + cl::desc("Print Mach-O universal headers " + "(requires -macho)")); + +cl::opt + llvm::ArchiveHeaders("archive-headers", + cl::desc("Print archive headers for Mach-O archives " + "(requires -macho)")); + +cl::opt + llvm::IndirectSymbols("indirect-symbols", + cl::desc("Print indirect symbol table for Mach-O " + "objects (requires -macho)")); + +cl::opt + llvm::DataInCode("data-in-code", + cl::desc("Print the data in code table for Mach-O objects " + "(requires -macho)")); + +cl::opt + llvm::LinkOptHints("link-opt-hints", + cl::desc("Print the linker optimization hints for " + "Mach-O objects (requires -macho)")); + +cl::list + llvm::DumpSections("section", + cl::desc("Prints the specified segment,section for " + "Mach-O objects (requires -macho)")); + +static cl::list + ArchFlags("arch", cl::desc("architecture(s) from a Mach-O file to dump"), + cl::ZeroOrMore); +bool ArchAll = false; static std::string ThumbTripleName; @@ -108,58 +159,80 @@ typedef std::pair DiceTableEntry; typedef std::vector DiceTable; typedef DiceTable::iterator dice_table_iterator; -static bool -compareDiceTableEntries(const DiceTableEntry i, - const DiceTableEntry j) { - return i.first == j.first; +// This is used to search for a data in code table entry for the PC being +// disassembled. The j parameter has the PC in j.first. A single data in code +// table entry can cover many bytes for each of its Kind's. So if the offset, +// aka the i.first value, of the data in code table entry plus its Length +// covers the PC being searched for this will return true. If not it will +// return false. +static bool compareDiceTableEntries(const DiceTableEntry &i, + const DiceTableEntry &j) { + uint16_t Length; + i.second.getLength(Length); + + return j.first >= i.first && j.first < i.first + Length; } -static void DumpDataInCode(const char *bytes, uint64_t Size, - unsigned short Kind) { - uint64_t Value; +static uint64_t DumpDataInCode(const char *bytes, uint64_t Length, + unsigned short Kind) { + uint32_t Value, Size = 1; switch (Kind) { + default: case MachO::DICE_KIND_DATA: - switch (Size) { - case 4: - Value = bytes[3] << 24 | - bytes[2] << 16 | - bytes[1] << 8 | - bytes[0]; + if (Length >= 4) { + if (!NoShowRawInsn) + DumpBytes(StringRef(bytes, 4)); + Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0]; outs() << "\t.long " << Value; - break; - case 2: - Value = bytes[1] << 8 | - bytes[0]; + Size = 4; + } else if (Length >= 2) { + if (!NoShowRawInsn) + DumpBytes(StringRef(bytes, 2)); + Value = bytes[1] << 8 | bytes[0]; outs() << "\t.short " << Value; - break; - case 1: + Size = 2; + } else { + if (!NoShowRawInsn) + DumpBytes(StringRef(bytes, 2)); Value = bytes[0]; outs() << "\t.byte " << Value; - break; + Size = 1; } - outs() << "\t@ KIND_DATA\n"; + if (Kind == MachO::DICE_KIND_DATA) + outs() << "\t@ KIND_DATA\n"; + else + outs() << "\t@ data in code kind = " << Kind << "\n"; break; case MachO::DICE_KIND_JUMP_TABLE8: + if (!NoShowRawInsn) + DumpBytes(StringRef(bytes, 1)); Value = bytes[0]; - outs() << "\t.byte " << Value << "\t@ KIND_JUMP_TABLE8"; + outs() << "\t.byte " << format("%3u", Value) << "\t@ KIND_JUMP_TABLE8\n"; + Size = 1; break; case MachO::DICE_KIND_JUMP_TABLE16: - Value = bytes[1] << 8 | - bytes[0]; - outs() << "\t.short " << Value << "\t@ KIND_JUMP_TABLE16"; + if (!NoShowRawInsn) + DumpBytes(StringRef(bytes, 2)); + Value = bytes[1] << 8 | bytes[0]; + outs() << "\t.short " << format("%5u", Value & 0xffff) + << "\t@ KIND_JUMP_TABLE16\n"; + Size = 2; break; case MachO::DICE_KIND_JUMP_TABLE32: - Value = bytes[3] << 24 | - bytes[2] << 16 | - bytes[1] << 8 | - bytes[0]; - outs() << "\t.long " << Value << "\t@ KIND_JUMP_TABLE32"; - break; - default: - outs() << "\t@ data in code kind = " << Kind << "\n"; + case MachO::DICE_KIND_ABS_JUMP_TABLE32: + if (!NoShowRawInsn) + DumpBytes(StringRef(bytes, 4)); + Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0]; + outs() << "\t.long " << Value; + if (Kind == MachO::DICE_KIND_JUMP_TABLE32) + outs() << "\t@ KIND_JUMP_TABLE32\n"; + else + outs() << "\t@ KIND_ABS_JUMP_TABLE32\n"; + Size = 4; break; } + return Size; } static void getSectionsAndSymbols(const MachO::mach_header Header, @@ -168,8 +241,12 @@ static void getSectionsAndSymbols(const MachO::mach_header Header, std::vector &Symbols, SmallVectorImpl &FoundFns, uint64_t &BaseSegmentAddress) { - for (const SymbolRef &Symbol : MachOObj->symbols()) - Symbols.push_back(Symbol); + for (const SymbolRef &Symbol : MachOObj->symbols()) { + StringRef SymName; + Symbol.getName(SymName); + if (!SymName.startswith("ltmp")) + Symbols.push_back(Symbol); + } for (const SectionRef &Section : MachOObj->sections()) { StringRef SectName; @@ -180,20 +257,18 @@ static void getSectionsAndSymbols(const MachO::mach_header Header, MachOObjectFile::LoadCommandInfo Command = MachOObj->getFirstLoadCommandInfo(); bool BaseSegmentAddressSet = false; - for (unsigned i = 0; ; ++i) { + for (unsigned i = 0;; ++i) { if (Command.C.cmd == MachO::LC_FUNCTION_STARTS) { // We found a function starts segment, parse the addresses for later // consumption. MachO::linkedit_data_command LLC = - MachOObj->getLinkeditDataLoadCommand(Command); + MachOObj->getLinkeditDataLoadCommand(Command); MachOObj->ReadULEB128s(LLC.dataoff, FoundFns); - } - else if (Command.C.cmd == MachO::LC_SEGMENT) { - MachO::segment_command SLC = - MachOObj->getSegmentLoadCommand(Command); + } else if (Command.C.cmd == MachO::LC_SEGMENT) { + MachO::segment_command SLC = MachOObj->getSegmentLoadCommand(Command); StringRef SegName = SLC.segname; - if(!BaseSegmentAddressSet && SegName != "__PAGEZERO") { + if (!BaseSegmentAddressSet && SegName != "__PAGEZERO") { BaseSegmentAddressSet = true; BaseSegmentAddress = SLC.vmaddr; } @@ -206,26 +281,2282 @@ static void getSectionsAndSymbols(const MachO::mach_header Header, } } -static void DisassembleInputMachO2(StringRef Filename, - MachOObjectFile *MachOOF); +static void PrintIndirectSymbolTable(MachOObjectFile *O, bool verbose, + uint32_t n, uint32_t count, + uint32_t stride, uint64_t addr) { + MachO::dysymtab_command Dysymtab = O->getDysymtabLoadCommand(); + uint32_t nindirectsyms = Dysymtab.nindirectsyms; + if (n > nindirectsyms) + outs() << " (entries start past the end of the indirect symbol " + "table) (reserved1 field greater than the table size)"; + else if (n + count > nindirectsyms) + outs() << " (entries extends past the end of the indirect symbol " + "table)"; + outs() << "\n"; + uint32_t cputype = O->getHeader().cputype; + if (cputype & MachO::CPU_ARCH_ABI64) + outs() << "address index"; + else + outs() << "address index"; + if (verbose) + outs() << " name\n"; + else + outs() << "\n"; + for (uint32_t j = 0; j < count && n + j < nindirectsyms; j++) { + if (cputype & MachO::CPU_ARCH_ABI64) + outs() << format("0x%016" PRIx64, addr + j * stride) << " "; + else + outs() << format("0x%08" PRIx32, addr + j * stride) << " "; + MachO::dysymtab_command Dysymtab = O->getDysymtabLoadCommand(); + uint32_t indirect_symbol = O->getIndirectSymbolTableEntry(Dysymtab, n + j); + if (indirect_symbol == MachO::INDIRECT_SYMBOL_LOCAL) { + outs() << "LOCAL\n"; + continue; + } + if (indirect_symbol == + (MachO::INDIRECT_SYMBOL_LOCAL | MachO::INDIRECT_SYMBOL_ABS)) { + outs() << "LOCAL ABSOLUTE\n"; + continue; + } + if (indirect_symbol == MachO::INDIRECT_SYMBOL_ABS) { + outs() << "ABSOLUTE\n"; + continue; + } + outs() << format("%5u ", indirect_symbol); + MachO::symtab_command Symtab = O->getSymtabLoadCommand(); + if (indirect_symbol < Symtab.nsyms) { + symbol_iterator Sym = O->getSymbolByIndex(indirect_symbol); + SymbolRef Symbol = *Sym; + StringRef SymName; + Symbol.getName(SymName); + outs() << SymName; + } else { + outs() << "?"; + } + outs() << "\n"; + } +} + +static void PrintIndirectSymbols(MachOObjectFile *O, bool verbose) { + uint32_t LoadCommandCount = O->getHeader().ncmds; + MachOObjectFile::LoadCommandInfo Load = O->getFirstLoadCommandInfo(); + for (unsigned I = 0;; ++I) { + if (Load.C.cmd == MachO::LC_SEGMENT_64) { + MachO::segment_command_64 Seg = O->getSegment64LoadCommand(Load); + for (unsigned J = 0; J < Seg.nsects; ++J) { + MachO::section_64 Sec = O->getSection64(Load, J); + uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; + if (section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS || + section_type == MachO::S_LAZY_SYMBOL_POINTERS || + section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS || + section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS || + section_type == MachO::S_SYMBOL_STUBS) { + uint32_t stride; + if (section_type == MachO::S_SYMBOL_STUBS) + stride = Sec.reserved2; + else + stride = 8; + if (stride == 0) { + outs() << "Can't print indirect symbols for (" << Sec.segname << "," + << Sec.sectname << ") " + << "(size of stubs in reserved2 field is zero)\n"; + continue; + } + uint32_t count = Sec.size / stride; + outs() << "Indirect symbols for (" << Sec.segname << "," + << Sec.sectname << ") " << count << " entries"; + uint32_t n = Sec.reserved1; + PrintIndirectSymbolTable(O, verbose, n, count, stride, Sec.addr); + } + } + } else if (Load.C.cmd == MachO::LC_SEGMENT) { + MachO::segment_command Seg = O->getSegmentLoadCommand(Load); + for (unsigned J = 0; J < Seg.nsects; ++J) { + MachO::section Sec = O->getSection(Load, J); + uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; + if (section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS || + section_type == MachO::S_LAZY_SYMBOL_POINTERS || + section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS || + section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS || + section_type == MachO::S_SYMBOL_STUBS) { + uint32_t stride; + if (section_type == MachO::S_SYMBOL_STUBS) + stride = Sec.reserved2; + else + stride = 4; + if (stride == 0) { + outs() << "Can't print indirect symbols for (" << Sec.segname << "," + << Sec.sectname << ") " + << "(size of stubs in reserved2 field is zero)\n"; + continue; + } + uint32_t count = Sec.size / stride; + outs() << "Indirect symbols for (" << Sec.segname << "," + << Sec.sectname << ") " << count << " entries"; + uint32_t n = Sec.reserved1; + PrintIndirectSymbolTable(O, verbose, n, count, stride, Sec.addr); + } + } + } + if (I == LoadCommandCount - 1) + break; + else + Load = O->getNextLoadCommandInfo(Load); + } +} -void llvm::DisassembleInputMachO(StringRef Filename) { - ErrorOr> BuffOrErr = - MemoryBuffer::getFileOrSTDIN(Filename); - if (std::error_code EC = BuffOrErr.getError()) { - errs() << "llvm-objdump: " << Filename << ": " << EC.message() << "\n"; +static void PrintDataInCodeTable(MachOObjectFile *O, bool verbose) { + MachO::linkedit_data_command DIC = O->getDataInCodeLoadCommand(); + uint32_t nentries = DIC.datasize / sizeof(struct MachO::data_in_code_entry); + outs() << "Data in code table (" << nentries << " entries)\n"; + outs() << "offset length kind\n"; + for (dice_iterator DI = O->begin_dices(), DE = O->end_dices(); DI != DE; + ++DI) { + uint32_t Offset; + DI->getOffset(Offset); + outs() << format("0x%08" PRIx32, Offset) << " "; + uint16_t Length; + DI->getLength(Length); + outs() << format("%6u", Length) << " "; + uint16_t Kind; + DI->getKind(Kind); + if (verbose) { + switch (Kind) { + case MachO::DICE_KIND_DATA: + outs() << "DATA"; + break; + case MachO::DICE_KIND_JUMP_TABLE8: + outs() << "JUMP_TABLE8"; + break; + case MachO::DICE_KIND_JUMP_TABLE16: + outs() << "JUMP_TABLE16"; + break; + case MachO::DICE_KIND_JUMP_TABLE32: + outs() << "JUMP_TABLE32"; + break; + case MachO::DICE_KIND_ABS_JUMP_TABLE32: + outs() << "ABS_JUMP_TABLE32"; + break; + default: + outs() << format("0x%04" PRIx32, Kind); + break; + } + } else + outs() << format("0x%04" PRIx32, Kind); + outs() << "\n"; + } +} + +static void PrintLinkOptHints(MachOObjectFile *O) { + MachO::linkedit_data_command LohLC = O->getLinkOptHintsLoadCommand(); + const char *loh = O->getData().substr(LohLC.dataoff, 1).data(); + uint32_t nloh = LohLC.datasize; + outs() << "Linker optimiztion hints (" << nloh << " total bytes)\n"; + for (uint32_t i = 0; i < nloh;) { + unsigned n; + uint64_t identifier = decodeULEB128((const uint8_t *)(loh + i), &n); + i += n; + outs() << " identifier " << identifier << " "; + if (i >= nloh) + return; + switch (identifier) { + case 1: + outs() << "AdrpAdrp\n"; + break; + case 2: + outs() << "AdrpLdr\n"; + break; + case 3: + outs() << "AdrpAddLdr\n"; + break; + case 4: + outs() << "AdrpLdrGotLdr\n"; + break; + case 5: + outs() << "AdrpAddStr\n"; + break; + case 6: + outs() << "AdrpLdrGotStr\n"; + break; + case 7: + outs() << "AdrpAdd\n"; + break; + case 8: + outs() << "AdrpLdrGot\n"; + break; + default: + outs() << "Unknown identifier value\n"; + break; + } + uint64_t narguments = decodeULEB128((const uint8_t *)(loh + i), &n); + i += n; + outs() << " narguments " << narguments << "\n"; + if (i >= nloh) + return; + + for (uint32_t j = 0; j < narguments; j++) { + uint64_t value = decodeULEB128((const uint8_t *)(loh + i), &n); + i += n; + outs() << "\tvalue " << format("0x%" PRIx64, value) << "\n"; + if (i >= nloh) + return; + } + } +} + +typedef DenseMap SymbolAddressMap; + +static void CreateSymbolAddressMap(MachOObjectFile *O, + SymbolAddressMap *AddrMap) { + // Create a map of symbol addresses to symbol names. + for (const SymbolRef &Symbol : O->symbols()) { + SymbolRef::Type ST; + Symbol.getType(ST); + if (ST == SymbolRef::ST_Function || ST == SymbolRef::ST_Data || + ST == SymbolRef::ST_Other) { + uint64_t Address; + Symbol.getAddress(Address); + StringRef SymName; + Symbol.getName(SymName); + (*AddrMap)[Address] = SymName; + } + } +} + +// GuessSymbolName is passed the address of what might be a symbol and a +// pointer to the SymbolAddressMap. It returns the name of a symbol +// with that address or nullptr if no symbol is found with that address. +static const char *GuessSymbolName(uint64_t value, SymbolAddressMap *AddrMap) { + const char *SymbolName = nullptr; + // A DenseMap can't lookup up some values. + if (value != 0xffffffffffffffffULL && value != 0xfffffffffffffffeULL) { + StringRef name = AddrMap->lookup(value); + if (!name.empty()) + SymbolName = name.data(); + } + return SymbolName; +} + +static void DumpInitTermPointerSection(MachOObjectFile *O, const char *sect, + uint32_t sect_size, uint64_t sect_addr, + SymbolAddressMap *AddrMap, + bool verbose) { + uint32_t stride; + if (O->is64Bit()) + stride = sizeof(uint64_t); + else + stride = sizeof(uint32_t); + for (uint32_t i = 0; i < sect_size; i += stride) { + const char *SymbolName = nullptr; + if (O->is64Bit()) { + outs() << format("0x%016" PRIx64, sect_addr + i * stride) << " "; + uint64_t pointer_value; + memcpy(&pointer_value, sect + i, stride); + if (O->isLittleEndian() != sys::IsLittleEndianHost) + sys::swapByteOrder(pointer_value); + outs() << format("0x%016" PRIx64, pointer_value); + if (verbose) + SymbolName = GuessSymbolName(pointer_value, AddrMap); + } else { + outs() << format("0x%08" PRIx64, sect_addr + i * stride) << " "; + uint32_t pointer_value; + memcpy(&pointer_value, sect + i, stride); + if (O->isLittleEndian() != sys::IsLittleEndianHost) + sys::swapByteOrder(pointer_value); + outs() << format("0x%08" PRIx32, pointer_value); + if (verbose) + SymbolName = GuessSymbolName(pointer_value, AddrMap); + } + if (SymbolName) + outs() << " " << SymbolName; + outs() << "\n"; + } +} + +static void DumpRawSectionContents(MachOObjectFile *O, const char *sect, + uint32_t size, uint64_t addr) { + uint32_t cputype = O->getHeader().cputype; + if (cputype == MachO::CPU_TYPE_I386 || cputype == MachO::CPU_TYPE_X86_64) { + uint32_t j; + for (uint32_t i = 0; i < size; i += j, addr += j) { + if (O->is64Bit()) + outs() << format("%016" PRIx64, addr) << "\t"; + else + outs() << format("%08" PRIx64, sect) << "\t"; + for (j = 0; j < 16 && i + j < size; j++) { + uint8_t byte_word = *(sect + i + j); + outs() << format("%02" PRIx32, (uint32_t)byte_word) << " "; + } + outs() << "\n"; + } + } else { + uint32_t j; + for (uint32_t i = 0; i < size; i += j, addr += j) { + if (O->is64Bit()) + outs() << format("%016" PRIx64, addr) << "\t"; + else + outs() << format("%08" PRIx64, sect) << "\t"; + for (j = 0; j < 4 * sizeof(int32_t) && i + j < size; + j += sizeof(int32_t)) { + if (i + j + sizeof(int32_t) < size) { + uint32_t long_word; + memcpy(&long_word, sect + i + j, sizeof(int32_t)); + if (O->isLittleEndian() != sys::IsLittleEndianHost) + sys::swapByteOrder(long_word); + outs() << format("%08" PRIx32, long_word) << " "; + } else { + for (uint32_t k = 0; i + j + k < size; k++) { + uint8_t byte_word = *(sect + i + j); + outs() << format("%02" PRIx32, (uint32_t)byte_word) << " "; + } + } + } + outs() << "\n"; + } + } +} + +static void DisassembleMachO(StringRef Filename, MachOObjectFile *MachOOF, + StringRef DisSegName, StringRef DisSectName); + +static void DumpSectionContents(StringRef Filename, MachOObjectFile *O, + bool verbose) { + SymbolAddressMap AddrMap; + if (verbose) + CreateSymbolAddressMap(O, &AddrMap); + + for (unsigned i = 0; i < DumpSections.size(); ++i) { + StringRef DumpSection = DumpSections[i]; + std::pair DumpSegSectName; + DumpSegSectName = DumpSection.split(','); + StringRef DumpSegName, DumpSectName; + if (DumpSegSectName.second.size()) { + DumpSegName = DumpSegSectName.first; + DumpSectName = DumpSegSectName.second; + } else { + DumpSegName = ""; + DumpSectName = DumpSegSectName.first; + } + for (const SectionRef &Section : O->sections()) { + StringRef SectName; + Section.getName(SectName); + DataRefImpl Ref = Section.getRawDataRefImpl(); + StringRef SegName = O->getSectionFinalSegmentName(Ref); + if ((DumpSegName.empty() || SegName == DumpSegName) && + (SectName == DumpSectName)) { + outs() << "Contents of (" << SegName << "," << SectName + << ") section\n"; + uint32_t section_flags; + if (O->is64Bit()) { + const MachO::section_64 Sec = O->getSection64(Ref); + section_flags = Sec.flags; + + } else { + const MachO::section Sec = O->getSection(Ref); + section_flags = Sec.flags; + } + uint32_t section_type = section_flags & MachO::SECTION_TYPE; + + StringRef BytesStr; + Section.getContents(BytesStr); + const char *sect = reinterpret_cast(BytesStr.data()); + uint32_t sect_size = BytesStr.size(); + uint64_t sect_addr = Section.getAddress(); + + if (verbose) { + if ((section_flags & MachO::S_ATTR_PURE_INSTRUCTIONS) || + (section_flags & MachO::S_ATTR_SOME_INSTRUCTIONS)) { + DisassembleMachO(Filename, O, SegName, SectName); + continue; + } + switch (section_type) { + case MachO::S_REGULAR: + DumpRawSectionContents(O, sect, sect_size, sect_addr); + break; + case MachO::S_ZEROFILL: + outs() << "zerofill section and has no contents in the file\n"; + break; + case MachO::S_MOD_INIT_FUNC_POINTERS: + case MachO::S_MOD_TERM_FUNC_POINTERS: + DumpInitTermPointerSection(O, sect, sect_size, sect_addr, &AddrMap, + verbose); + break; + default: + outs() << "Unknown section type (" + << format("0x%08" PRIx32, section_type) << ")\n"; + DumpRawSectionContents(O, sect, sect_size, sect_addr); + break; + } + } else { + if (section_type == MachO::S_ZEROFILL) + outs() << "zerofill section and has no contents in the file\n"; + else + DumpRawSectionContents(O, sect, sect_size, sect_addr); + } + } + } + } +} + +// checkMachOAndArchFlags() checks to see if the ObjectFile is a Mach-O file +// and if it is and there is a list of architecture flags is specified then +// check to make sure this Mach-O file is one of those architectures or all +// architectures were specified. If not then an error is generated and this +// routine returns false. Else it returns true. +static bool checkMachOAndArchFlags(ObjectFile *O, StringRef Filename) { + if (isa(O) && !ArchAll && ArchFlags.size() != 0) { + MachOObjectFile *MachO = dyn_cast(O); + bool ArchFound = false; + MachO::mach_header H; + MachO::mach_header_64 H_64; + Triple T; + if (MachO->is64Bit()) { + H_64 = MachO->MachOObjectFile::getHeader64(); + T = MachOObjectFile::getArch(H_64.cputype, H_64.cpusubtype); + } else { + H = MachO->MachOObjectFile::getHeader(); + T = MachOObjectFile::getArch(H.cputype, H.cpusubtype); + } + unsigned i; + for (i = 0; i < ArchFlags.size(); ++i) { + if (ArchFlags[i] == T.getArchName()) + ArchFound = true; + break; + } + if (!ArchFound) { + errs() << "llvm-objdump: file: " + Filename + " does not contain " + << "architecture: " + ArchFlags[i] + "\n"; + return false; + } + } + return true; +} + +// ProcessMachO() is passed a single opened Mach-O file, which may be an +// archive member and or in a slice of a universal file. It prints the +// the file name and header info and then processes it according to the +// command line options. +static void ProcessMachO(StringRef Filename, MachOObjectFile *MachOOF, + StringRef ArchiveMemberName = StringRef(), + StringRef ArchitectureName = StringRef()) { + // If we are doing some processing here on the Mach-O file print the header + // info. And don't print it otherwise like in the case of printing the + // UniversalHeaders or ArchiveHeaders. + if (Disassemble || PrivateHeaders || ExportsTrie || Rebase || Bind || + LazyBind || WeakBind || IndirectSymbols || DataInCode || LinkOptHints || + DumpSections.size() != 0) { + outs() << Filename; + if (!ArchiveMemberName.empty()) + outs() << '(' << ArchiveMemberName << ')'; + if (!ArchitectureName.empty()) + outs() << " (architecture " << ArchitectureName << ")"; + outs() << ":\n"; + } + + if (Disassemble) + DisassembleMachO(Filename, MachOOF, "__TEXT", "__text"); + if (IndirectSymbols) + PrintIndirectSymbols(MachOOF, true); + if (DataInCode) + PrintDataInCodeTable(MachOOF, true); + if (LinkOptHints) + PrintLinkOptHints(MachOOF); + if (Relocations) + PrintRelocations(MachOOF); + if (SectionHeaders) + PrintSectionHeaders(MachOOF); + if (SectionContents) + PrintSectionContents(MachOOF); + if (DumpSections.size() != 0) + DumpSectionContents(Filename, MachOOF, true); + if (SymbolTable) + PrintSymbolTable(MachOOF); + if (UnwindInfo) + printMachOUnwindInfo(MachOOF); + if (PrivateHeaders) + printMachOFileHeader(MachOOF); + if (ExportsTrie) + printExportsTrie(MachOOF); + if (Rebase) + printRebaseTable(MachOOF); + if (Bind) + printBindTable(MachOOF); + if (LazyBind) + printLazyBindTable(MachOOF); + if (WeakBind) + printWeakBindTable(MachOOF); +} + +// printUnknownCPUType() helps print_fat_headers for unknown CPU's. +static void printUnknownCPUType(uint32_t cputype, uint32_t cpusubtype) { + outs() << " cputype (" << cputype << ")\n"; + outs() << " cpusubtype (" << cpusubtype << ")\n"; +} + +// printCPUType() helps print_fat_headers by printing the cputype and +// pusubtype (symbolically for the one's it knows about). +static void printCPUType(uint32_t cputype, uint32_t cpusubtype) { + switch (cputype) { + case MachO::CPU_TYPE_I386: + switch (cpusubtype) { + case MachO::CPU_SUBTYPE_I386_ALL: + outs() << " cputype CPU_TYPE_I386\n"; + outs() << " cpusubtype CPU_SUBTYPE_I386_ALL\n"; + break; + default: + printUnknownCPUType(cputype, cpusubtype); + break; + } + break; + case MachO::CPU_TYPE_X86_64: + switch (cpusubtype) { + case MachO::CPU_SUBTYPE_X86_64_ALL: + outs() << " cputype CPU_TYPE_X86_64\n"; + outs() << " cpusubtype CPU_SUBTYPE_X86_64_ALL\n"; + break; + case MachO::CPU_SUBTYPE_X86_64_H: + outs() << " cputype CPU_TYPE_X86_64\n"; + outs() << " cpusubtype CPU_SUBTYPE_X86_64_H\n"; + break; + default: + printUnknownCPUType(cputype, cpusubtype); + break; + } + break; + case MachO::CPU_TYPE_ARM: + switch (cpusubtype) { + case MachO::CPU_SUBTYPE_ARM_ALL: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_ALL\n"; + break; + case MachO::CPU_SUBTYPE_ARM_V4T: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_V4T\n"; + break; + case MachO::CPU_SUBTYPE_ARM_V5TEJ: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_V5TEJ\n"; + break; + case MachO::CPU_SUBTYPE_ARM_XSCALE: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_XSCALE\n"; + break; + case MachO::CPU_SUBTYPE_ARM_V6: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_V6\n"; + break; + case MachO::CPU_SUBTYPE_ARM_V6M: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_V6M\n"; + break; + case MachO::CPU_SUBTYPE_ARM_V7: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_V7\n"; + break; + case MachO::CPU_SUBTYPE_ARM_V7EM: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_V7EM\n"; + break; + case MachO::CPU_SUBTYPE_ARM_V7K: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_V7K\n"; + break; + case MachO::CPU_SUBTYPE_ARM_V7M: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_V7M\n"; + break; + case MachO::CPU_SUBTYPE_ARM_V7S: + outs() << " cputype CPU_TYPE_ARM\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM_V7S\n"; + break; + default: + printUnknownCPUType(cputype, cpusubtype); + break; + } + break; + case MachO::CPU_TYPE_ARM64: + switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) { + case MachO::CPU_SUBTYPE_ARM64_ALL: + outs() << " cputype CPU_TYPE_ARM64\n"; + outs() << " cpusubtype CPU_SUBTYPE_ARM64_ALL\n"; + break; + default: + printUnknownCPUType(cputype, cpusubtype); + break; + } + break; + default: + printUnknownCPUType(cputype, cpusubtype); + break; + } +} + +static void printMachOUniversalHeaders(const object::MachOUniversalBinary *UB, + bool verbose) { + outs() << "Fat headers\n"; + if (verbose) + outs() << "fat_magic FAT_MAGIC\n"; + else + outs() << "fat_magic " << format("0x%" PRIx32, MachO::FAT_MAGIC) << "\n"; + + uint32_t nfat_arch = UB->getNumberOfObjects(); + StringRef Buf = UB->getData(); + uint64_t size = Buf.size(); + uint64_t big_size = sizeof(struct MachO::fat_header) + + nfat_arch * sizeof(struct MachO::fat_arch); + outs() << "nfat_arch " << UB->getNumberOfObjects(); + if (nfat_arch == 0) + outs() << " (malformed, contains zero architecture types)\n"; + else if (big_size > size) + outs() << " (malformed, architectures past end of file)\n"; + else + outs() << "\n"; + + for (uint32_t i = 0; i < nfat_arch; ++i) { + MachOUniversalBinary::ObjectForArch OFA(UB, i); + uint32_t cputype = OFA.getCPUType(); + uint32_t cpusubtype = OFA.getCPUSubType(); + outs() << "architecture "; + for (uint32_t j = 0; i != 0 && j <= i - 1; j++) { + MachOUniversalBinary::ObjectForArch other_OFA(UB, j); + uint32_t other_cputype = other_OFA.getCPUType(); + uint32_t other_cpusubtype = other_OFA.getCPUSubType(); + if (cputype != 0 && cpusubtype != 0 && cputype == other_cputype && + (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) == + (other_cpusubtype & ~MachO::CPU_SUBTYPE_MASK)) { + outs() << "(illegal duplicate architecture) "; + break; + } + } + if (verbose) { + outs() << OFA.getArchTypeName() << "\n"; + printCPUType(cputype, cpusubtype & ~MachO::CPU_SUBTYPE_MASK); + } else { + outs() << i << "\n"; + outs() << " cputype " << cputype << "\n"; + outs() << " cpusubtype " << (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) + << "\n"; + } + if (verbose && + (cpusubtype & MachO::CPU_SUBTYPE_MASK) == MachO::CPU_SUBTYPE_LIB64) + outs() << " capabilities CPU_SUBTYPE_LIB64\n"; + else + outs() << " capabilities " + << format("0x%" PRIx32, + (cpusubtype & MachO::CPU_SUBTYPE_MASK) >> 24) << "\n"; + outs() << " offset " << OFA.getOffset(); + if (OFA.getOffset() > size) + outs() << " (past end of file)"; + if (OFA.getOffset() % (1 << OFA.getAlign()) != 0) + outs() << " (not aligned on it's alignment (2^" << OFA.getAlign() << ")"; + outs() << "\n"; + outs() << " size " << OFA.getSize(); + big_size = OFA.getOffset() + OFA.getSize(); + if (big_size > size) + outs() << " (past end of file)"; + outs() << "\n"; + outs() << " align 2^" << OFA.getAlign() << " (" << (1 << OFA.getAlign()) + << ")\n"; + } +} + +static void printArchiveChild(Archive::Child &C, bool verbose, + bool print_offset) { + if (print_offset) + outs() << C.getChildOffset() << "\t"; + sys::fs::perms Mode = C.getAccessMode(); + if (verbose) { + // FIXME: this first dash, "-", is for (Mode & S_IFMT) == S_IFREG. + // But there is nothing in sys::fs::perms for S_IFMT or S_IFREG. + outs() << "-"; + if (Mode & sys::fs::owner_read) + outs() << "r"; + else + outs() << "-"; + if (Mode & sys::fs::owner_write) + outs() << "w"; + else + outs() << "-"; + if (Mode & sys::fs::owner_exe) + outs() << "x"; + else + outs() << "-"; + if (Mode & sys::fs::group_read) + outs() << "r"; + else + outs() << "-"; + if (Mode & sys::fs::group_write) + outs() << "w"; + else + outs() << "-"; + if (Mode & sys::fs::group_exe) + outs() << "x"; + else + outs() << "-"; + if (Mode & sys::fs::others_read) + outs() << "r"; + else + outs() << "-"; + if (Mode & sys::fs::others_write) + outs() << "w"; + else + outs() << "-"; + if (Mode & sys::fs::others_exe) + outs() << "x"; + else + outs() << "-"; + } else { + outs() << format("0%o ", Mode); + } + + unsigned UID = C.getUID(); + outs() << format("%3d/", UID); + unsigned GID = C.getGID(); + outs() << format("%-3d ", GID); + uint64_t Size = C.getRawSize(); + outs() << format("%5" PRId64, Size) << " "; + + StringRef RawLastModified = C.getRawLastModified(); + if (verbose) { + unsigned Seconds; + if (RawLastModified.getAsInteger(10, Seconds)) + outs() << "(date: \"%s\" contains non-decimal chars) " << RawLastModified; + else { + // Since cime(3) returns a 26 character string of the form: + // "Sun Sep 16 01:03:52 1973\n\0" + // just print 24 characters. + time_t t = Seconds; + outs() << format("%.24s ", ctime(&t)); + } + } else { + outs() << RawLastModified << " "; + } + + if (verbose) { + ErrorOr NameOrErr = C.getName(); + if (NameOrErr.getError()) { + StringRef RawName = C.getRawName(); + outs() << RawName << "\n"; + } else { + StringRef Name = NameOrErr.get(); + outs() << Name << "\n"; + } + } else { + StringRef RawName = C.getRawName(); + outs() << RawName << "\n"; + } +} + +static void printArchiveHeaders(Archive *A, bool verbose, bool print_offset) { + if (A->hasSymbolTable()) { + Archive::child_iterator S = A->getSymbolTableChild(); + Archive::Child C = *S; + printArchiveChild(C, verbose, print_offset); + } + for (Archive::child_iterator I = A->child_begin(), E = A->child_end(); I != E; + ++I) { + Archive::Child C = *I; + printArchiveChild(C, verbose, print_offset); + } +} + +// ParseInputMachO() parses the named Mach-O file in Filename and handles the +// -arch flags selecting just those slices as specified by them and also parses +// archive files. Then for each individual Mach-O file ProcessMachO() is +// called to process the file based on the command line options. +void llvm::ParseInputMachO(StringRef Filename) { + // Check for -arch all and verifiy the -arch flags are valid. + for (unsigned i = 0; i < ArchFlags.size(); ++i) { + if (ArchFlags[i] == "all") { + ArchAll = true; + } else { + if (!MachOObjectFile::isValidArch(ArchFlags[i])) { + errs() << "llvm-objdump: Unknown architecture named '" + ArchFlags[i] + + "'for the -arch option\n"; + return; + } + } + } + + // Attempt to open the binary. + ErrorOr> BinaryOrErr = createBinary(Filename); + if (std::error_code EC = BinaryOrErr.getError()) { + errs() << "llvm-objdump: '" << Filename << "': " << EC.message() << ".\n"; return; } - std::unique_ptr Buff = std::move(BuffOrErr.get()); + Binary &Bin = *BinaryOrErr.get().getBinary(); + + if (Archive *A = dyn_cast(&Bin)) { + outs() << "Archive : " << Filename << "\n"; + if (ArchiveHeaders) + printArchiveHeaders(A, true, false); + for (Archive::child_iterator I = A->child_begin(), E = A->child_end(); + I != E; ++I) { + ErrorOr> ChildOrErr = I->getAsBinary(); + if (ChildOrErr.getError()) + continue; + if (MachOObjectFile *O = dyn_cast(&*ChildOrErr.get())) { + if (!checkMachOAndArchFlags(O, Filename)) + return; + ProcessMachO(Filename, O, O->getFileName()); + } + } + return; + } + if (UniversalHeaders) { + if (MachOUniversalBinary *UB = dyn_cast(&Bin)) + printMachOUniversalHeaders(UB, true); + } + if (MachOUniversalBinary *UB = dyn_cast(&Bin)) { + // If we have a list of architecture flags specified dump only those. + if (!ArchAll && ArchFlags.size() != 0) { + // Look for a slice in the universal binary that matches each ArchFlag. + bool ArchFound; + for (unsigned i = 0; i < ArchFlags.size(); ++i) { + ArchFound = false; + for (MachOUniversalBinary::object_iterator I = UB->begin_objects(), + E = UB->end_objects(); + I != E; ++I) { + if (ArchFlags[i] == I->getArchTypeName()) { + ArchFound = true; + ErrorOr> ObjOrErr = + I->getAsObjectFile(); + std::string ArchitectureName = ""; + if (ArchFlags.size() > 1) + ArchitectureName = I->getArchTypeName(); + if (ObjOrErr) { + ObjectFile &O = *ObjOrErr.get(); + if (MachOObjectFile *MachOOF = dyn_cast(&O)) + ProcessMachO(Filename, MachOOF, "", ArchitectureName); + } else if (ErrorOr> AOrErr = + I->getAsArchive()) { + std::unique_ptr &A = *AOrErr; + outs() << "Archive : " << Filename; + if (!ArchitectureName.empty()) + outs() << " (architecture " << ArchitectureName << ")"; + outs() << "\n"; + if (ArchiveHeaders) + printArchiveHeaders(A.get(), true, false); + for (Archive::child_iterator AI = A->child_begin(), + AE = A->child_end(); + AI != AE; ++AI) { + ErrorOr> ChildOrErr = AI->getAsBinary(); + if (ChildOrErr.getError()) + continue; + if (MachOObjectFile *O = + dyn_cast(&*ChildOrErr.get())) + ProcessMachO(Filename, O, O->getFileName(), ArchitectureName); + } + } + } + } + if (!ArchFound) { + errs() << "llvm-objdump: file: " + Filename + " does not contain " + << "architecture: " + ArchFlags[i] + "\n"; + return; + } + } + return; + } + // No architecture flags were specified so if this contains a slice that + // matches the host architecture dump only that. + if (!ArchAll) { + for (MachOUniversalBinary::object_iterator I = UB->begin_objects(), + E = UB->end_objects(); + I != E; ++I) { + if (MachOObjectFile::getHostArch().getArchName() == + I->getArchTypeName()) { + ErrorOr> ObjOrErr = I->getAsObjectFile(); + std::string ArchiveName; + ArchiveName.clear(); + if (ObjOrErr) { + ObjectFile &O = *ObjOrErr.get(); + if (MachOObjectFile *MachOOF = dyn_cast(&O)) + ProcessMachO(Filename, MachOOF); + } else if (ErrorOr> AOrErr = + I->getAsArchive()) { + std::unique_ptr &A = *AOrErr; + outs() << "Archive : " << Filename << "\n"; + if (ArchiveHeaders) + printArchiveHeaders(A.get(), true, false); + for (Archive::child_iterator AI = A->child_begin(), + AE = A->child_end(); + AI != AE; ++AI) { + ErrorOr> ChildOrErr = AI->getAsBinary(); + if (ChildOrErr.getError()) + continue; + if (MachOObjectFile *O = + dyn_cast(&*ChildOrErr.get())) + ProcessMachO(Filename, O, O->getFileName()); + } + } + return; + } + } + } + // Either all architectures have been specified or none have been specified + // and this does not contain the host architecture so dump all the slices. + bool moreThanOneArch = UB->getNumberOfObjects() > 1; + for (MachOUniversalBinary::object_iterator I = UB->begin_objects(), + E = UB->end_objects(); + I != E; ++I) { + ErrorOr> ObjOrErr = I->getAsObjectFile(); + std::string ArchitectureName = ""; + if (moreThanOneArch) + ArchitectureName = I->getArchTypeName(); + if (ObjOrErr) { + ObjectFile &Obj = *ObjOrErr.get(); + if (MachOObjectFile *MachOOF = dyn_cast(&Obj)) + ProcessMachO(Filename, MachOOF, "", ArchitectureName); + } else if (ErrorOr> AOrErr = I->getAsArchive()) { + std::unique_ptr &A = *AOrErr; + outs() << "Archive : " << Filename; + if (!ArchitectureName.empty()) + outs() << " (architecture " << ArchitectureName << ")"; + outs() << "\n"; + if (ArchiveHeaders) + printArchiveHeaders(A.get(), true, false); + for (Archive::child_iterator AI = A->child_begin(), AE = A->child_end(); + AI != AE; ++AI) { + ErrorOr> ChildOrErr = AI->getAsBinary(); + if (ChildOrErr.getError()) + continue; + if (MachOObjectFile *O = + dyn_cast(&*ChildOrErr.get())) { + if (MachOObjectFile *MachOOF = dyn_cast(O)) + ProcessMachO(Filename, MachOOF, MachOOF->getFileName(), + ArchitectureName); + } + } + } + } + return; + } + if (ObjectFile *O = dyn_cast(&Bin)) { + if (!checkMachOAndArchFlags(O, Filename)) + return; + if (MachOObjectFile *MachOOF = dyn_cast(&*O)) { + ProcessMachO(Filename, MachOOF); + } else + errs() << "llvm-objdump: '" << Filename << "': " + << "Object is not a Mach-O file type.\n"; + } else + errs() << "llvm-objdump: '" << Filename << "': " + << "Unrecognized file type.\n"; +} + +typedef std::pair BindInfoEntry; +typedef std::vector BindTable; +typedef BindTable::iterator bind_table_iterator; + +// The block of info used by the Symbolizer call backs. +struct DisassembleInfo { + bool verbose; + MachOObjectFile *O; + SectionRef S; + SymbolAddressMap *AddrMap; + std::vector *Sections; + const char *class_name; + const char *selector_name; + char *method; + char *demangled_name; + uint64_t adrp_addr; + uint32_t adrp_inst; + BindTable *bindtable; +}; + +// SymbolizerGetOpInfo() is the operand information call back function. +// This is called to get the symbolic information for operand(s) of an +// instruction when it is being done. This routine does this from +// the relocation information, symbol table, etc. That block of information +// is a pointer to the struct DisassembleInfo that was passed when the +// disassembler context was created and passed to back to here when +// called back by the disassembler for instruction operands that could have +// relocation information. The address of the instruction containing operand is +// at the Pc parameter. The immediate value the operand has is passed in +// op_info->Value and is at Offset past the start of the instruction and has a +// byte Size of 1, 2 or 4. The symbolc information is returned in TagBuf is the +// LLVMOpInfo1 struct defined in the header "llvm-c/Disassembler.h" as symbol +// names and addends of the symbolic expression to add for the operand. The +// value of TagType is currently 1 (for the LLVMOpInfo1 struct). If symbolic +// information is returned then this function returns 1 else it returns 0. +int SymbolizerGetOpInfo(void *DisInfo, uint64_t Pc, uint64_t Offset, + uint64_t Size, int TagType, void *TagBuf) { + struct DisassembleInfo *info = (struct DisassembleInfo *)DisInfo; + struct LLVMOpInfo1 *op_info = (struct LLVMOpInfo1 *)TagBuf; + uint64_t value = op_info->Value; + + // Make sure all fields returned are zero if we don't set them. + memset((void *)op_info, '\0', sizeof(struct LLVMOpInfo1)); + op_info->Value = value; + + // If the TagType is not the value 1 which it code knows about or if no + // verbose symbolic information is wanted then just return 0, indicating no + // information is being returned. + if (TagType != 1 || info->verbose == false) + return 0; + + unsigned int Arch = info->O->getArch(); + if (Arch == Triple::x86) { + if (Size != 1 && Size != 2 && Size != 4 && Size != 0) + return 0; + // First search the section's relocation entries (if any) for an entry + // for this section offset. + uint32_t sect_addr = info->S.getAddress(); + uint32_t sect_offset = (Pc + Offset) - sect_addr; + bool reloc_found = false; + DataRefImpl Rel; + MachO::any_relocation_info RE; + bool isExtern = false; + SymbolRef Symbol; + bool r_scattered = false; + uint32_t r_value, pair_r_value, r_type; + for (const RelocationRef &Reloc : info->S.relocations()) { + uint64_t RelocOffset; + Reloc.getOffset(RelocOffset); + if (RelocOffset == sect_offset) { + Rel = Reloc.getRawDataRefImpl(); + RE = info->O->getRelocation(Rel); + r_type = info->O->getAnyRelocationType(RE); + r_scattered = info->O->isRelocationScattered(RE); + if (r_scattered) { + r_value = info->O->getScatteredRelocationValue(RE); + if (r_type == MachO::GENERIC_RELOC_SECTDIFF || + r_type == MachO::GENERIC_RELOC_LOCAL_SECTDIFF) { + DataRefImpl RelNext = Rel; + info->O->moveRelocationNext(RelNext); + MachO::any_relocation_info RENext; + RENext = info->O->getRelocation(RelNext); + if (info->O->isRelocationScattered(RENext)) + pair_r_value = info->O->getScatteredRelocationValue(RENext); + else + return 0; + } + } else { + isExtern = info->O->getPlainRelocationExternal(RE); + if (isExtern) { + symbol_iterator RelocSym = Reloc.getSymbol(); + Symbol = *RelocSym; + } + } + reloc_found = true; + break; + } + } + if (reloc_found && isExtern) { + StringRef SymName; + Symbol.getName(SymName); + const char *name = SymName.data(); + op_info->AddSymbol.Present = 1; + op_info->AddSymbol.Name = name; + // For i386 extern relocation entries the value in the instruction is + // the offset from the symbol, and value is already set in op_info->Value. + return 1; + } + if (reloc_found && (r_type == MachO::GENERIC_RELOC_SECTDIFF || + r_type == MachO::GENERIC_RELOC_LOCAL_SECTDIFF)) { + const char *add = GuessSymbolName(r_value, info->AddrMap); + const char *sub = GuessSymbolName(pair_r_value, info->AddrMap); + uint32_t offset = value - (r_value - pair_r_value); + op_info->AddSymbol.Present = 1; + if (add != nullptr) + op_info->AddSymbol.Name = add; + else + op_info->AddSymbol.Value = r_value; + op_info->SubtractSymbol.Present = 1; + if (sub != nullptr) + op_info->SubtractSymbol.Name = sub; + else + op_info->SubtractSymbol.Value = pair_r_value; + op_info->Value = offset; + return 1; + } + // TODO: + // Second search the external relocation entries of a fully linked image + // (if any) for an entry that matches this segment offset. + // uint32_t seg_offset = (Pc + Offset); + return 0; + } else if (Arch == Triple::x86_64) { + if (Size != 1 && Size != 2 && Size != 4 && Size != 0) + return 0; + // First search the section's relocation entries (if any) for an entry + // for this section offset. + uint64_t sect_addr = info->S.getAddress(); + uint64_t sect_offset = (Pc + Offset) - sect_addr; + bool reloc_found = false; + DataRefImpl Rel; + MachO::any_relocation_info RE; + bool isExtern = false; + SymbolRef Symbol; + for (const RelocationRef &Reloc : info->S.relocations()) { + uint64_t RelocOffset; + Reloc.getOffset(RelocOffset); + if (RelocOffset == sect_offset) { + Rel = Reloc.getRawDataRefImpl(); + RE = info->O->getRelocation(Rel); + // NOTE: Scattered relocations don't exist on x86_64. + isExtern = info->O->getPlainRelocationExternal(RE); + if (isExtern) { + symbol_iterator RelocSym = Reloc.getSymbol(); + Symbol = *RelocSym; + } + reloc_found = true; + break; + } + } + if (reloc_found && isExtern) { + // The Value passed in will be adjusted by the Pc if the instruction + // adds the Pc. But for x86_64 external relocation entries the Value + // is the offset from the external symbol. + if (info->O->getAnyRelocationPCRel(RE)) + op_info->Value -= Pc + Offset + Size; + StringRef SymName; + Symbol.getName(SymName); + const char *name = SymName.data(); + unsigned Type = info->O->getAnyRelocationType(RE); + if (Type == MachO::X86_64_RELOC_SUBTRACTOR) { + DataRefImpl RelNext = Rel; + info->O->moveRelocationNext(RelNext); + MachO::any_relocation_info RENext = info->O->getRelocation(RelNext); + unsigned TypeNext = info->O->getAnyRelocationType(RENext); + bool isExternNext = info->O->getPlainRelocationExternal(RENext); + unsigned SymbolNum = info->O->getPlainRelocationSymbolNum(RENext); + if (TypeNext == MachO::X86_64_RELOC_UNSIGNED && isExternNext) { + op_info->SubtractSymbol.Present = 1; + op_info->SubtractSymbol.Name = name; + symbol_iterator RelocSymNext = info->O->getSymbolByIndex(SymbolNum); + Symbol = *RelocSymNext; + StringRef SymNameNext; + Symbol.getName(SymNameNext); + name = SymNameNext.data(); + } + } + // TODO: add the VariantKinds to op_info->VariantKind for relocation types + // like: X86_64_RELOC_TLV, X86_64_RELOC_GOT_LOAD and X86_64_RELOC_GOT. + op_info->AddSymbol.Present = 1; + op_info->AddSymbol.Name = name; + return 1; + } + // TODO: + // Second search the external relocation entries of a fully linked image + // (if any) for an entry that matches this segment offset. + // uint64_t seg_offset = (Pc + Offset); + return 0; + } else if (Arch == Triple::arm) { + if (Offset != 0 || (Size != 4 && Size != 2)) + return 0; + // First search the section's relocation entries (if any) for an entry + // for this section offset. + uint32_t sect_addr = info->S.getAddress(); + uint32_t sect_offset = (Pc + Offset) - sect_addr; + bool reloc_found = false; + DataRefImpl Rel; + MachO::any_relocation_info RE; + bool isExtern = false; + SymbolRef Symbol; + bool r_scattered = false; + uint32_t r_value, pair_r_value, r_type, r_length, other_half; + for (const RelocationRef &Reloc : info->S.relocations()) { + uint64_t RelocOffset; + Reloc.getOffset(RelocOffset); + if (RelocOffset == sect_offset) { + Rel = Reloc.getRawDataRefImpl(); + RE = info->O->getRelocation(Rel); + r_length = info->O->getAnyRelocationLength(RE); + r_scattered = info->O->isRelocationScattered(RE); + if (r_scattered) { + r_value = info->O->getScatteredRelocationValue(RE); + r_type = info->O->getScatteredRelocationType(RE); + } else { + r_type = info->O->getAnyRelocationType(RE); + isExtern = info->O->getPlainRelocationExternal(RE); + if (isExtern) { + symbol_iterator RelocSym = Reloc.getSymbol(); + Symbol = *RelocSym; + } + } + if (r_type == MachO::ARM_RELOC_HALF || + r_type == MachO::ARM_RELOC_SECTDIFF || + r_type == MachO::ARM_RELOC_LOCAL_SECTDIFF || + r_type == MachO::ARM_RELOC_HALF_SECTDIFF) { + DataRefImpl RelNext = Rel; + info->O->moveRelocationNext(RelNext); + MachO::any_relocation_info RENext; + RENext = info->O->getRelocation(RelNext); + other_half = info->O->getAnyRelocationAddress(RENext) & 0xffff; + if (info->O->isRelocationScattered(RENext)) + pair_r_value = info->O->getScatteredRelocationValue(RENext); + } + reloc_found = true; + break; + } + } + if (reloc_found && isExtern) { + StringRef SymName; + Symbol.getName(SymName); + const char *name = SymName.data(); + op_info->AddSymbol.Present = 1; + op_info->AddSymbol.Name = name; + if (value != 0) { + switch (r_type) { + case MachO::ARM_RELOC_HALF: + if ((r_length & 0x1) == 1) { + op_info->Value = value << 16 | other_half; + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16; + } else { + op_info->Value = other_half << 16 | value; + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16; + } + break; + default: + break; + } + } else { + switch (r_type) { + case MachO::ARM_RELOC_HALF: + if ((r_length & 0x1) == 1) { + op_info->Value = value << 16 | other_half; + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16; + } else { + op_info->Value = other_half << 16 | value; + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16; + } + break; + default: + break; + } + } + return 1; + } + // If we have a branch that is not an external relocation entry then + // return 0 so the code in tryAddingSymbolicOperand() can use the + // SymbolLookUp call back with the branch target address to look up the + // symbol and possiblity add an annotation for a symbol stub. + if (reloc_found && isExtern == 0 && (r_type == MachO::ARM_RELOC_BR24 || + r_type == MachO::ARM_THUMB_RELOC_BR22)) + return 0; + + uint32_t offset = 0; + if (reloc_found) { + if (r_type == MachO::ARM_RELOC_HALF || + r_type == MachO::ARM_RELOC_HALF_SECTDIFF) { + if ((r_length & 0x1) == 1) + value = value << 16 | other_half; + else + value = other_half << 16 | value; + } + if (r_scattered && (r_type != MachO::ARM_RELOC_HALF && + r_type != MachO::ARM_RELOC_HALF_SECTDIFF)) { + offset = value - r_value; + value = r_value; + } + } + + if (reloc_found && r_type == MachO::ARM_RELOC_HALF_SECTDIFF) { + if ((r_length & 0x1) == 1) + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16; + else + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16; + const char *add = GuessSymbolName(r_value, info->AddrMap); + const char *sub = GuessSymbolName(pair_r_value, info->AddrMap); + int32_t offset = value - (r_value - pair_r_value); + op_info->AddSymbol.Present = 1; + if (add != nullptr) + op_info->AddSymbol.Name = add; + else + op_info->AddSymbol.Value = r_value; + op_info->SubtractSymbol.Present = 1; + if (sub != nullptr) + op_info->SubtractSymbol.Name = sub; + else + op_info->SubtractSymbol.Value = pair_r_value; + op_info->Value = offset; + return 1; + } + + if (reloc_found == false) + return 0; + + op_info->AddSymbol.Present = 1; + op_info->Value = offset; + if (reloc_found) { + if (r_type == MachO::ARM_RELOC_HALF) { + if ((r_length & 0x1) == 1) + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16; + else + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16; + } + } + const char *add = GuessSymbolName(value, info->AddrMap); + if (add != nullptr) { + op_info->AddSymbol.Name = add; + return 1; + } + op_info->AddSymbol.Value = value; + return 1; + } else if (Arch == Triple::aarch64) { + if (Offset != 0 || Size != 4) + return 0; + // First search the section's relocation entries (if any) for an entry + // for this section offset. + uint64_t sect_addr = info->S.getAddress(); + uint64_t sect_offset = (Pc + Offset) - sect_addr; + bool reloc_found = false; + DataRefImpl Rel; + MachO::any_relocation_info RE; + bool isExtern = false; + SymbolRef Symbol; + uint32_t r_type = 0; + for (const RelocationRef &Reloc : info->S.relocations()) { + uint64_t RelocOffset; + Reloc.getOffset(RelocOffset); + if (RelocOffset == sect_offset) { + Rel = Reloc.getRawDataRefImpl(); + RE = info->O->getRelocation(Rel); + r_type = info->O->getAnyRelocationType(RE); + if (r_type == MachO::ARM64_RELOC_ADDEND) { + DataRefImpl RelNext = Rel; + info->O->moveRelocationNext(RelNext); + MachO::any_relocation_info RENext = info->O->getRelocation(RelNext); + if (value == 0) { + value = info->O->getPlainRelocationSymbolNum(RENext); + op_info->Value = value; + } + } + // NOTE: Scattered relocations don't exist on arm64. + isExtern = info->O->getPlainRelocationExternal(RE); + if (isExtern) { + symbol_iterator RelocSym = Reloc.getSymbol(); + Symbol = *RelocSym; + } + reloc_found = true; + break; + } + } + if (reloc_found && isExtern) { + StringRef SymName; + Symbol.getName(SymName); + const char *name = SymName.data(); + op_info->AddSymbol.Present = 1; + op_info->AddSymbol.Name = name; + + switch (r_type) { + case MachO::ARM64_RELOC_PAGE21: + /* @page */ + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_PAGE; + break; + case MachO::ARM64_RELOC_PAGEOFF12: + /* @pageoff */ + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_PAGEOFF; + break; + case MachO::ARM64_RELOC_GOT_LOAD_PAGE21: + /* @gotpage */ + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_GOTPAGE; + break; + case MachO::ARM64_RELOC_GOT_LOAD_PAGEOFF12: + /* @gotpageoff */ + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_GOTPAGEOFF; + break; + case MachO::ARM64_RELOC_TLVP_LOAD_PAGE21: + /* @tvlppage is not implemented in llvm-mc */ + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_TLVP; + break; + case MachO::ARM64_RELOC_TLVP_LOAD_PAGEOFF12: + /* @tvlppageoff is not implemented in llvm-mc */ + op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_TLVOFF; + break; + default: + case MachO::ARM64_RELOC_BRANCH26: + op_info->VariantKind = LLVMDisassembler_VariantKind_None; + break; + } + return 1; + } + return 0; + } else { + return 0; + } +} + +// GuessCstringPointer is passed the address of what might be a pointer to a +// literal string in a cstring section. If that address is in a cstring section +// it returns a pointer to that string. Else it returns nullptr. +const char *GuessCstringPointer(uint64_t ReferenceValue, + struct DisassembleInfo *info) { + uint32_t LoadCommandCount = info->O->getHeader().ncmds; + MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo(); + for (unsigned I = 0;; ++I) { + if (Load.C.cmd == MachO::LC_SEGMENT_64) { + MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load); + for (unsigned J = 0; J < Seg.nsects; ++J) { + MachO::section_64 Sec = info->O->getSection64(Load, J); + uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; + if (section_type == MachO::S_CSTRING_LITERALS && + ReferenceValue >= Sec.addr && + ReferenceValue < Sec.addr + Sec.size) { + uint64_t sect_offset = ReferenceValue - Sec.addr; + uint64_t object_offset = Sec.offset + sect_offset; + StringRef MachOContents = info->O->getData(); + uint64_t object_size = MachOContents.size(); + const char *object_addr = (const char *)MachOContents.data(); + if (object_offset < object_size) { + const char *name = object_addr + object_offset; + return name; + } else { + return nullptr; + } + } + } + } else if (Load.C.cmd == MachO::LC_SEGMENT) { + MachO::segment_command Seg = info->O->getSegmentLoadCommand(Load); + for (unsigned J = 0; J < Seg.nsects; ++J) { + MachO::section Sec = info->O->getSection(Load, J); + uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; + if (section_type == MachO::S_CSTRING_LITERALS && + ReferenceValue >= Sec.addr && + ReferenceValue < Sec.addr + Sec.size) { + uint64_t sect_offset = ReferenceValue - Sec.addr; + uint64_t object_offset = Sec.offset + sect_offset; + StringRef MachOContents = info->O->getData(); + uint64_t object_size = MachOContents.size(); + const char *object_addr = (const char *)MachOContents.data(); + if (object_offset < object_size) { + const char *name = object_addr + object_offset; + return name; + } else { + return nullptr; + } + } + } + } + if (I == LoadCommandCount - 1) + break; + else + Load = info->O->getNextLoadCommandInfo(Load); + } + return nullptr; +} + +// GuessIndirectSymbol returns the name of the indirect symbol for the +// ReferenceValue passed in or nullptr. This is used when ReferenceValue maybe +// an address of a symbol stub or a lazy or non-lazy pointer to associate the +// symbol name being referenced by the stub or pointer. +static const char *GuessIndirectSymbol(uint64_t ReferenceValue, + struct DisassembleInfo *info) { + uint32_t LoadCommandCount = info->O->getHeader().ncmds; + MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo(); + MachO::dysymtab_command Dysymtab = info->O->getDysymtabLoadCommand(); + MachO::symtab_command Symtab = info->O->getSymtabLoadCommand(); + for (unsigned I = 0;; ++I) { + if (Load.C.cmd == MachO::LC_SEGMENT_64) { + MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load); + for (unsigned J = 0; J < Seg.nsects; ++J) { + MachO::section_64 Sec = info->O->getSection64(Load, J); + uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; + if ((section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS || + section_type == MachO::S_LAZY_SYMBOL_POINTERS || + section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS || + section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS || + section_type == MachO::S_SYMBOL_STUBS) && + ReferenceValue >= Sec.addr && + ReferenceValue < Sec.addr + Sec.size) { + uint32_t stride; + if (section_type == MachO::S_SYMBOL_STUBS) + stride = Sec.reserved2; + else + stride = 8; + if (stride == 0) + return nullptr; + uint32_t index = Sec.reserved1 + (ReferenceValue - Sec.addr) / stride; + if (index < Dysymtab.nindirectsyms) { + uint32_t indirect_symbol = + info->O->getIndirectSymbolTableEntry(Dysymtab, index); + if (indirect_symbol < Symtab.nsyms) { + symbol_iterator Sym = info->O->getSymbolByIndex(indirect_symbol); + SymbolRef Symbol = *Sym; + StringRef SymName; + Symbol.getName(SymName); + const char *name = SymName.data(); + return name; + } + } + } + } + } else if (Load.C.cmd == MachO::LC_SEGMENT) { + MachO::segment_command Seg = info->O->getSegmentLoadCommand(Load); + for (unsigned J = 0; J < Seg.nsects; ++J) { + MachO::section Sec = info->O->getSection(Load, J); + uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; + if ((section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS || + section_type == MachO::S_LAZY_SYMBOL_POINTERS || + section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS || + section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS || + section_type == MachO::S_SYMBOL_STUBS) && + ReferenceValue >= Sec.addr && + ReferenceValue < Sec.addr + Sec.size) { + uint32_t stride; + if (section_type == MachO::S_SYMBOL_STUBS) + stride = Sec.reserved2; + else + stride = 4; + if (stride == 0) + return nullptr; + uint32_t index = Sec.reserved1 + (ReferenceValue - Sec.addr) / stride; + if (index < Dysymtab.nindirectsyms) { + uint32_t indirect_symbol = + info->O->getIndirectSymbolTableEntry(Dysymtab, index); + if (indirect_symbol < Symtab.nsyms) { + symbol_iterator Sym = info->O->getSymbolByIndex(indirect_symbol); + SymbolRef Symbol = *Sym; + StringRef SymName; + Symbol.getName(SymName); + const char *name = SymName.data(); + return name; + } + } + } + } + } + if (I == LoadCommandCount - 1) + break; + else + Load = info->O->getNextLoadCommandInfo(Load); + } + return nullptr; +} + +// method_reference() is called passing it the ReferenceName that might be +// a reference it to an Objective-C method call. If so then it allocates and +// assembles a method call string with the values last seen and saved in +// the DisassembleInfo's class_name and selector_name fields. This is saved +// into the method field of the info and any previous string is free'ed. +// Then the class_name field in the info is set to nullptr. The method call +// string is set into ReferenceName and ReferenceType is set to +// LLVMDisassembler_ReferenceType_Out_Objc_Message. If this not a method call +// then both ReferenceType and ReferenceName are left unchanged. +static void method_reference(struct DisassembleInfo *info, + uint64_t *ReferenceType, + const char **ReferenceName) { + unsigned int Arch = info->O->getArch(); + if (*ReferenceName != nullptr) { + if (strcmp(*ReferenceName, "_objc_msgSend") == 0) { + if (info->selector_name != nullptr) { + if (info->method != nullptr) + free(info->method); + if (info->class_name != nullptr) { + info->method = (char *)malloc(5 + strlen(info->class_name) + + strlen(info->selector_name)); + if (info->method != nullptr) { + strcpy(info->method, "+["); + strcat(info->method, info->class_name); + strcat(info->method, " "); + strcat(info->method, info->selector_name); + strcat(info->method, "]"); + *ReferenceName = info->method; + *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message; + } + } else { + info->method = (char *)malloc(9 + strlen(info->selector_name)); + if (info->method != nullptr) { + if (Arch == Triple::x86_64) + strcpy(info->method, "-[%rdi "); + else if (Arch == Triple::aarch64) + strcpy(info->method, "-[x0 "); + else + strcpy(info->method, "-[r? "); + strcat(info->method, info->selector_name); + strcat(info->method, "]"); + *ReferenceName = info->method; + *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message; + } + } + info->class_name = nullptr; + } + } else if (strcmp(*ReferenceName, "_objc_msgSendSuper2") == 0) { + if (info->selector_name != nullptr) { + if (info->method != nullptr) + free(info->method); + info->method = (char *)malloc(17 + strlen(info->selector_name)); + if (info->method != nullptr) { + if (Arch == Triple::x86_64) + strcpy(info->method, "-[[%rdi super] "); + else if (Arch == Triple::aarch64) + strcpy(info->method, "-[[x0 super] "); + else + strcpy(info->method, "-[[r? super] "); + strcat(info->method, info->selector_name); + strcat(info->method, "]"); + *ReferenceName = info->method; + *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message; + } + info->class_name = nullptr; + } + } + } +} + +// GuessPointerPointer() is passed the address of what might be a pointer to +// a reference to an Objective-C class, selector, message ref or cfstring. +// If so the value of the pointer is returned and one of the booleans are set +// to true. If not zero is returned and all the booleans are set to false. +static uint64_t GuessPointerPointer(uint64_t ReferenceValue, + struct DisassembleInfo *info, + bool &classref, bool &selref, bool &msgref, + bool &cfstring) { + classref = false; + selref = false; + msgref = false; + cfstring = false; + uint32_t LoadCommandCount = info->O->getHeader().ncmds; + MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo(); + for (unsigned I = 0;; ++I) { + if (Load.C.cmd == MachO::LC_SEGMENT_64) { + MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load); + for (unsigned J = 0; J < Seg.nsects; ++J) { + MachO::section_64 Sec = info->O->getSection64(Load, J); + if ((strncmp(Sec.sectname, "__objc_selrefs", 16) == 0 || + strncmp(Sec.sectname, "__objc_classrefs", 16) == 0 || + strncmp(Sec.sectname, "__objc_superrefs", 16) == 0 || + strncmp(Sec.sectname, "__objc_msgrefs", 16) == 0 || + strncmp(Sec.sectname, "__cfstring", 16) == 0) && + ReferenceValue >= Sec.addr && + ReferenceValue < Sec.addr + Sec.size) { + uint64_t sect_offset = ReferenceValue - Sec.addr; + uint64_t object_offset = Sec.offset + sect_offset; + StringRef MachOContents = info->O->getData(); + uint64_t object_size = MachOContents.size(); + const char *object_addr = (const char *)MachOContents.data(); + if (object_offset < object_size) { + uint64_t pointer_value; + memcpy(&pointer_value, object_addr + object_offset, + sizeof(uint64_t)); + if (info->O->isLittleEndian() != sys::IsLittleEndianHost) + sys::swapByteOrder(pointer_value); + if (strncmp(Sec.sectname, "__objc_selrefs", 16) == 0) + selref = true; + else if (strncmp(Sec.sectname, "__objc_classrefs", 16) == 0 || + strncmp(Sec.sectname, "__objc_superrefs", 16) == 0) + classref = true; + else if (strncmp(Sec.sectname, "__objc_msgrefs", 16) == 0 && + ReferenceValue + 8 < Sec.addr + Sec.size) { + msgref = true; + memcpy(&pointer_value, object_addr + object_offset + 8, + sizeof(uint64_t)); + if (info->O->isLittleEndian() != sys::IsLittleEndianHost) + sys::swapByteOrder(pointer_value); + } else if (strncmp(Sec.sectname, "__cfstring", 16) == 0) + cfstring = true; + return pointer_value; + } else { + return 0; + } + } + } + } + // TODO: Look for LC_SEGMENT for 32-bit Mach-O files. + if (I == LoadCommandCount - 1) + break; + else + Load = info->O->getNextLoadCommandInfo(Load); + } + return 0; +} + +// get_pointer_64 returns a pointer to the bytes in the object file at the +// Address from a section in the Mach-O file. And indirectly returns the +// offset into the section, number of bytes left in the section past the offset +// and which section is was being referenced. If the Address is not in a +// section nullptr is returned. +const char *get_pointer_64(uint64_t Address, uint32_t &offset, uint32_t &left, + SectionRef &S, DisassembleInfo *info) { + offset = 0; + left = 0; + S = SectionRef(); + for (unsigned SectIdx = 0; SectIdx != info->Sections->size(); SectIdx++) { + uint64_t SectAddress = ((*(info->Sections))[SectIdx]).getAddress(); + uint64_t SectSize = ((*(info->Sections))[SectIdx]).getSize(); + if (Address >= SectAddress && Address < SectAddress + SectSize) { + S = (*(info->Sections))[SectIdx]; + offset = Address - SectAddress; + left = SectSize - offset; + StringRef SectContents; + ((*(info->Sections))[SectIdx]).getContents(SectContents); + return SectContents.data() + offset; + } + } + return nullptr; +} + +// get_symbol_64() returns the name of a symbol (or nullptr) and the address of +// the symbol indirectly through n_value. Based on the relocation information +// for the specified section offset in the specified section reference. +const char *get_symbol_64(uint32_t sect_offset, SectionRef S, + DisassembleInfo *info, uint64_t &n_value) { + n_value = 0; + if (info->verbose == false) + return nullptr; + + // See if there is an external relocation entry at the sect_offset. + bool reloc_found = false; + DataRefImpl Rel; + MachO::any_relocation_info RE; + bool isExtern = false; + SymbolRef Symbol; + for (const RelocationRef &Reloc : S.relocations()) { + uint64_t RelocOffset; + Reloc.getOffset(RelocOffset); + if (RelocOffset == sect_offset) { + Rel = Reloc.getRawDataRefImpl(); + RE = info->O->getRelocation(Rel); + if (info->O->isRelocationScattered(RE)) + continue; + isExtern = info->O->getPlainRelocationExternal(RE); + if (isExtern) { + symbol_iterator RelocSym = Reloc.getSymbol(); + Symbol = *RelocSym; + } + reloc_found = true; + break; + } + } + // If there is an external relocation entry for a symbol in this section + // at this section_offset then use that symbol's value for the n_value + // and return its name. + const char *SymbolName = nullptr; + if (reloc_found && isExtern) { + Symbol.getAddress(n_value); + StringRef name; + Symbol.getName(name); + if (!name.empty()) { + SymbolName = name.data(); + return SymbolName; + } + } + + // TODO: For fully linked images, look through the external relocation + // entries off the dynamic symtab command. For these the r_offset is from the + // start of the first writeable segment in the Mach-O file. So the offset + // to this section from that segment is passed to this routine by the caller, + // as the database_offset. Which is the difference of the section's starting + // address and the first writable segment. + // + // NOTE: need add passing the database_offset to this routine. + + // TODO: We did not find an external relocation entry so look up the + // ReferenceValue as an address of a symbol and if found return that symbol's + // name. + // + // NOTE: need add passing the ReferenceValue to this routine. Then that code + // would simply be this: + // SymbolName = GuessSymbolName(ReferenceValue, info->AddrMap); + + return SymbolName; +} + +// These are structs in the Objective-C meta data and read to produce the +// comments for disassembly. While these are part of the ABI they are no +// public defintions. So the are here not in include/llvm/Support/MachO.h . + +// The cfstring object in a 64-bit Mach-O file. +struct cfstring64_t { + uint64_t isa; // class64_t * (64-bit pointer) + uint64_t flags; // flag bits + uint64_t characters; // char * (64-bit pointer) + uint64_t length; // number of non-NULL characters in above +}; + +// The class object in a 64-bit Mach-O file. +struct class64_t { + uint64_t isa; // class64_t * (64-bit pointer) + uint64_t superclass; // class64_t * (64-bit pointer) + uint64_t cache; // Cache (64-bit pointer) + uint64_t vtable; // IMP * (64-bit pointer) + uint64_t data; // class_ro64_t * (64-bit pointer) +}; + +struct class_ro64_t { + uint32_t flags; + uint32_t instanceStart; + uint32_t instanceSize; + uint32_t reserved; + uint64_t ivarLayout; // const uint8_t * (64-bit pointer) + uint64_t name; // const char * (64-bit pointer) + uint64_t baseMethods; // const method_list_t * (64-bit pointer) + uint64_t baseProtocols; // const protocol_list_t * (64-bit pointer) + uint64_t ivars; // const ivar_list_t * (64-bit pointer) + uint64_t weakIvarLayout; // const uint8_t * (64-bit pointer) + uint64_t baseProperties; // const struct objc_property_list (64-bit pointer) +}; + +inline void swapStruct(struct cfstring64_t &cfs) { + sys::swapByteOrder(cfs.isa); + sys::swapByteOrder(cfs.flags); + sys::swapByteOrder(cfs.characters); + sys::swapByteOrder(cfs.length); +} + +inline void swapStruct(struct class64_t &c) { + sys::swapByteOrder(c.isa); + sys::swapByteOrder(c.superclass); + sys::swapByteOrder(c.cache); + sys::swapByteOrder(c.vtable); + sys::swapByteOrder(c.data); +} + +inline void swapStruct(struct class_ro64_t &cro) { + sys::swapByteOrder(cro.flags); + sys::swapByteOrder(cro.instanceStart); + sys::swapByteOrder(cro.instanceSize); + sys::swapByteOrder(cro.reserved); + sys::swapByteOrder(cro.ivarLayout); + sys::swapByteOrder(cro.name); + sys::swapByteOrder(cro.baseMethods); + sys::swapByteOrder(cro.baseProtocols); + sys::swapByteOrder(cro.ivars); + sys::swapByteOrder(cro.weakIvarLayout); + sys::swapByteOrder(cro.baseProperties); +} + +static const char *get_dyld_bind_info_symbolname(uint64_t ReferenceValue, + struct DisassembleInfo *info); + +// get_objc2_64bit_class_name() is used for disassembly and is passed a pointer +// to an Objective-C class and returns the class name. It is also passed the +// address of the pointer, so when the pointer is zero as it can be in an .o +// file, that is used to look for an external relocation entry with a symbol +// name. +const char *get_objc2_64bit_class_name(uint64_t pointer_value, + uint64_t ReferenceValue, + struct DisassembleInfo *info) { + const char *r; + uint32_t offset, left; + SectionRef S; + + // The pointer_value can be 0 in an object file and have a relocation + // entry for the class symbol at the ReferenceValue (the address of the + // pointer). + if (pointer_value == 0) { + r = get_pointer_64(ReferenceValue, offset, left, S, info); + if (r == nullptr || left < sizeof(uint64_t)) + return nullptr; + uint64_t n_value; + const char *symbol_name = get_symbol_64(offset, S, info, n_value); + if (symbol_name == nullptr) + return nullptr; + const char *class_name = strrchr(symbol_name, '$'); + if (class_name != nullptr && class_name[1] == '_' && class_name[2] != '\0') + return class_name + 2; + else + return nullptr; + } + + // The case were the pointer_value is non-zero and points to a class defined + // in this Mach-O file. + r = get_pointer_64(pointer_value, offset, left, S, info); + if (r == nullptr || left < sizeof(struct class64_t)) + return nullptr; + struct class64_t c; + memcpy(&c, r, sizeof(struct class64_t)); + if (info->O->isLittleEndian() != sys::IsLittleEndianHost) + swapStruct(c); + if (c.data == 0) + return nullptr; + r = get_pointer_64(c.data, offset, left, S, info); + if (r == nullptr || left < sizeof(struct class_ro64_t)) + return nullptr; + struct class_ro64_t cro; + memcpy(&cro, r, sizeof(struct class_ro64_t)); + if (info->O->isLittleEndian() != sys::IsLittleEndianHost) + swapStruct(cro); + if (cro.name == 0) + return nullptr; + const char *name = get_pointer_64(cro.name, offset, left, S, info); + return name; +} + +// get_objc2_64bit_cfstring_name is used for disassembly and is passed a +// pointer to a cfstring and returns its name or nullptr. +const char *get_objc2_64bit_cfstring_name(uint64_t ReferenceValue, + struct DisassembleInfo *info) { + const char *r, *name; + uint32_t offset, left; + SectionRef S; + struct cfstring64_t cfs; + uint64_t cfs_characters; + + r = get_pointer_64(ReferenceValue, offset, left, S, info); + if (r == nullptr || left < sizeof(struct cfstring64_t)) + return nullptr; + memcpy(&cfs, r, sizeof(struct cfstring64_t)); + if (info->O->isLittleEndian() != sys::IsLittleEndianHost) + swapStruct(cfs); + if (cfs.characters == 0) { + uint64_t n_value; + const char *symbol_name = get_symbol_64( + offset + offsetof(struct cfstring64_t, characters), S, info, n_value); + if (symbol_name == nullptr) + return nullptr; + cfs_characters = n_value; + } else + cfs_characters = cfs.characters; + name = get_pointer_64(cfs_characters, offset, left, S, info); + + return name; +} + +// get_objc2_64bit_selref() is used for disassembly and is passed a the address +// of a pointer to an Objective-C selector reference when the pointer value is +// zero as in a .o file and is likely to have a external relocation entry with +// who's symbol's n_value is the real pointer to the selector name. If that is +// the case the real pointer to the selector name is returned else 0 is +// returned +uint64_t get_objc2_64bit_selref(uint64_t ReferenceValue, + struct DisassembleInfo *info) { + uint32_t offset, left; + SectionRef S; + + const char *r = get_pointer_64(ReferenceValue, offset, left, S, info); + if (r == nullptr || left < sizeof(uint64_t)) + return 0; + uint64_t n_value; + const char *symbol_name = get_symbol_64(offset, S, info, n_value); + if (symbol_name == nullptr) + return 0; + return n_value; +} + +// GuessLiteralPointer returns a string which for the item in the Mach-O file +// for the address passed in as ReferenceValue for printing as a comment with +// the instruction and also returns the corresponding type of that item +// indirectly through ReferenceType. +// +// If ReferenceValue is an address of literal cstring then a pointer to the +// cstring is returned and ReferenceType is set to +// LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr . +// +// If ReferenceValue is an address of an Objective-C CFString, Selector ref or +// Class ref that name is returned and the ReferenceType is set accordingly. +// +// Lastly, literals which are Symbol address in a literal pool are looked for +// and if found the symbol name is returned and ReferenceType is set to +// LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr . +// +// If there is no item in the Mach-O file for the address passed in as +// ReferenceValue nullptr is returned and ReferenceType is unchanged. +const char *GuessLiteralPointer(uint64_t ReferenceValue, uint64_t ReferencePC, + uint64_t *ReferenceType, + struct DisassembleInfo *info) { + // First see if there is an external relocation entry at the ReferencePC. + uint64_t sect_addr = info->S.getAddress(); + uint64_t sect_offset = ReferencePC - sect_addr; + bool reloc_found = false; + DataRefImpl Rel; + MachO::any_relocation_info RE; + bool isExtern = false; + SymbolRef Symbol; + for (const RelocationRef &Reloc : info->S.relocations()) { + uint64_t RelocOffset; + Reloc.getOffset(RelocOffset); + if (RelocOffset == sect_offset) { + Rel = Reloc.getRawDataRefImpl(); + RE = info->O->getRelocation(Rel); + if (info->O->isRelocationScattered(RE)) + continue; + isExtern = info->O->getPlainRelocationExternal(RE); + if (isExtern) { + symbol_iterator RelocSym = Reloc.getSymbol(); + Symbol = *RelocSym; + } + reloc_found = true; + break; + } + } + // If there is an external relocation entry for a symbol in a section + // then used that symbol's value for the value of the reference. + if (reloc_found && isExtern) { + if (info->O->getAnyRelocationPCRel(RE)) { + unsigned Type = info->O->getAnyRelocationType(RE); + if (Type == MachO::X86_64_RELOC_SIGNED) { + Symbol.getAddress(ReferenceValue); + } + } + } + + // Look for literals such as Objective-C CFStrings refs, Selector refs, + // Message refs and Class refs. + bool classref, selref, msgref, cfstring; + uint64_t pointer_value = GuessPointerPointer(ReferenceValue, info, classref, + selref, msgref, cfstring); + if (classref == true && pointer_value == 0) { + // Note the ReferenceValue is a pointer into the __objc_classrefs section. + // And the pointer_value in that section is typically zero as it will be + // set by dyld as part of the "bind information". + const char *name = get_dyld_bind_info_symbolname(ReferenceValue, info); + if (name != nullptr) { + *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Class_Ref; + const char *class_name = strrchr(name, '$'); + if (class_name != nullptr && class_name[1] == '_' && + class_name[2] != '\0') { + info->class_name = class_name + 2; + return name; + } + } + } + + if (classref == true) { + *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Class_Ref; + const char *name = + get_objc2_64bit_class_name(pointer_value, ReferenceValue, info); + if (name != nullptr) + info->class_name = name; + else + name = "bad class ref"; + return name; + } + + if (cfstring == true) { + *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_CFString_Ref; + const char *name = get_objc2_64bit_cfstring_name(ReferenceValue, info); + return name; + } + + if (selref == true && pointer_value == 0) + pointer_value = get_objc2_64bit_selref(ReferenceValue, info); + + if (pointer_value != 0) + ReferenceValue = pointer_value; + + const char *name = GuessCstringPointer(ReferenceValue, info); + if (name) { + if (pointer_value != 0 && selref == true) { + *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Selector_Ref; + info->selector_name = name; + } else if (pointer_value != 0 && msgref == true) { + info->class_name = nullptr; + *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message_Ref; + info->selector_name = name; + } else + *ReferenceType = LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr; + return name; + } + + // Lastly look for an indirect symbol with this ReferenceValue which is in + // a literal pool. If found return that symbol name. + name = GuessIndirectSymbol(ReferenceValue, info); + if (name) { + *ReferenceType = LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr; + return name; + } + + return nullptr; +} + +// SymbolizerSymbolLookUp is the symbol lookup function passed when creating +// the Symbolizer. It looks up the ReferenceValue using the info passed via the +// pointer to the struct DisassembleInfo that was passed when MCSymbolizer +// is created and returns the symbol name that matches the ReferenceValue or +// nullptr if none. The ReferenceType is passed in for the IN type of +// reference the instruction is making from the values in defined in the header +// "llvm-c/Disassembler.h". On return the ReferenceType can set to a specific +// Out type and the ReferenceName will also be set which is added as a comment +// to the disassembled instruction. +// +#if HAVE_CXXABI_H +// If the symbol name is a C++ mangled name then the demangled name is +// returned through ReferenceName and ReferenceType is set to +// LLVMDisassembler_ReferenceType_DeMangled_Name . +#endif +// +// When this is called to get a symbol name for a branch target then the +// ReferenceType will be LLVMDisassembler_ReferenceType_In_Branch and then +// SymbolValue will be looked for in the indirect symbol table to determine if +// it is an address for a symbol stub. If so then the symbol name for that +// stub is returned indirectly through ReferenceName and then ReferenceType is +// set to LLVMDisassembler_ReferenceType_Out_SymbolStub. +// +// When this is called with an value loaded via a PC relative load then +// ReferenceType will be LLVMDisassembler_ReferenceType_In_PCrel_Load then the +// SymbolValue is checked to be an address of literal pointer, symbol pointer, +// or an Objective-C meta data reference. If so the output ReferenceType is +// set to correspond to that as well as setting the ReferenceName. +const char *SymbolizerSymbolLookUp(void *DisInfo, uint64_t ReferenceValue, + uint64_t *ReferenceType, + uint64_t ReferencePC, + const char **ReferenceName) { + struct DisassembleInfo *info = (struct DisassembleInfo *)DisInfo; + // If no verbose symbolic information is wanted then just return nullptr. + if (info->verbose == false) { + *ReferenceName = nullptr; + *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; + return nullptr; + } + + const char *SymbolName = GuessSymbolName(ReferenceValue, info->AddrMap); + + if (*ReferenceType == LLVMDisassembler_ReferenceType_In_Branch) { + *ReferenceName = GuessIndirectSymbol(ReferenceValue, info); + if (*ReferenceName != nullptr) { + method_reference(info, ReferenceType, ReferenceName); + if (*ReferenceType != LLVMDisassembler_ReferenceType_Out_Objc_Message) + *ReferenceType = LLVMDisassembler_ReferenceType_Out_SymbolStub; + } else +#if HAVE_CXXABI_H + if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) { + if (info->demangled_name != nullptr) + free(info->demangled_name); + int status; + info->demangled_name = + abi::__cxa_demangle(SymbolName + 1, nullptr, nullptr, &status); + if (info->demangled_name != nullptr) { + *ReferenceName = info->demangled_name; + *ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name; + } else + *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; + } else +#endif + *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; + } else if (*ReferenceType == LLVMDisassembler_ReferenceType_In_PCrel_Load) { + *ReferenceName = + GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info); + if (*ReferenceName) + method_reference(info, ReferenceType, ReferenceName); + else + *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; + // If this is arm64 and the reference is an adrp instruction save the + // instruction, passed in ReferenceValue and the address of the instruction + // for use later if we see and add immediate instruction. + } else if (info->O->getArch() == Triple::aarch64 && + *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_ADRP) { + info->adrp_inst = ReferenceValue; + info->adrp_addr = ReferencePC; + SymbolName = nullptr; + *ReferenceName = nullptr; + *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; + // If this is arm64 and reference is an add immediate instruction and we + // have + // seen an adrp instruction just before it and the adrp's Xd register + // matches + // this add's Xn register reconstruct the value being referenced and look to + // see if it is a literal pointer. Note the add immediate instruction is + // passed in ReferenceValue. + } else if (info->O->getArch() == Triple::aarch64 && + *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_ADDXri && + ReferencePC - 4 == info->adrp_addr && + (info->adrp_inst & 0x9f000000) == 0x90000000 && + (info->adrp_inst & 0x1f) == ((ReferenceValue >> 5) & 0x1f)) { + uint32_t addxri_inst; + uint64_t adrp_imm, addxri_imm; + + adrp_imm = + ((info->adrp_inst & 0x00ffffe0) >> 3) | ((info->adrp_inst >> 29) & 0x3); + if (info->adrp_inst & 0x0200000) + adrp_imm |= 0xfffffffffc000000LL; + + addxri_inst = ReferenceValue; + addxri_imm = (addxri_inst >> 10) & 0xfff; + if (((addxri_inst >> 22) & 0x3) == 1) + addxri_imm <<= 12; + + ReferenceValue = (info->adrp_addr & 0xfffffffffffff000LL) + + (adrp_imm << 12) + addxri_imm; + + *ReferenceName = + GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info); + if (*ReferenceName == nullptr) + *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; + // If this is arm64 and the reference is a load register instruction and we + // have seen an adrp instruction just before it and the adrp's Xd register + // matches this add's Xn register reconstruct the value being referenced and + // look to see if it is a literal pointer. Note the load register + // instruction is passed in ReferenceValue. + } else if (info->O->getArch() == Triple::aarch64 && + *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_LDRXui && + ReferencePC - 4 == info->adrp_addr && + (info->adrp_inst & 0x9f000000) == 0x90000000 && + (info->adrp_inst & 0x1f) == ((ReferenceValue >> 5) & 0x1f)) { + uint32_t ldrxui_inst; + uint64_t adrp_imm, ldrxui_imm; + + adrp_imm = + ((info->adrp_inst & 0x00ffffe0) >> 3) | ((info->adrp_inst >> 29) & 0x3); + if (info->adrp_inst & 0x0200000) + adrp_imm |= 0xfffffffffc000000LL; + + ldrxui_inst = ReferenceValue; + ldrxui_imm = (ldrxui_inst >> 10) & 0xfff; + + ReferenceValue = (info->adrp_addr & 0xfffffffffffff000LL) + + (adrp_imm << 12) + (ldrxui_imm << 3); + + *ReferenceName = + GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info); + if (*ReferenceName == nullptr) + *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; + } + // If this arm64 and is an load register (PC-relative) instruction the + // ReferenceValue is the PC plus the immediate value. + else if (info->O->getArch() == Triple::aarch64 && + (*ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_LDRXl || + *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_ADR)) { + *ReferenceName = + GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info); + if (*ReferenceName == nullptr) + *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; + } +#if HAVE_CXXABI_H + else if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) { + if (info->demangled_name != nullptr) + free(info->demangled_name); + int status; + info->demangled_name = + abi::__cxa_demangle(SymbolName + 1, nullptr, nullptr, &status); + if (info->demangled_name != nullptr) { + *ReferenceName = info->demangled_name; + *ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name; + } + } +#endif + else { + *ReferenceName = nullptr; + *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; + } - std::unique_ptr MachOOF = std::move( - ObjectFile::createMachOObjectFile(Buff.get()->getMemBufferRef()).get()); + return SymbolName; +} + +/// \brief Emits the comments that are stored in the CommentStream. +/// Each comment in the CommentStream must end with a newline. +static void emitComments(raw_svector_ostream &CommentStream, + SmallString<128> &CommentsToEmit, + formatted_raw_ostream &FormattedOS, + const MCAsmInfo &MAI) { + // Flush the stream before taking its content. + CommentStream.flush(); + StringRef Comments = CommentsToEmit.str(); + // Get the default information for printing a comment. + const char *CommentBegin = MAI.getCommentString(); + unsigned CommentColumn = MAI.getCommentColumn(); + bool IsFirst = true; + while (!Comments.empty()) { + if (!IsFirst) + FormattedOS << '\n'; + // Emit a line of comments. + FormattedOS.PadToColumn(CommentColumn); + size_t Position = Comments.find('\n'); + FormattedOS << CommentBegin << ' ' << Comments.substr(0, Position); + // Move after the newline character. + Comments = Comments.substr(Position + 1); + IsFirst = false; + } + FormattedOS.flush(); - DisassembleInputMachO2(Filename, MachOOF.get()); + // Tell the comment stream that the vector changed underneath it. + CommentsToEmit.clear(); + CommentStream.resync(); } -static void DisassembleInputMachO2(StringRef Filename, - MachOObjectFile *MachOOF) { +static void DisassembleMachO(StringRef Filename, MachOObjectFile *MachOOF, + StringRef DisSegName, StringRef DisSectName) { const char *McpuDefault = nullptr; const Target *ThumbTarget = nullptr; const Target *TheTarget = GetTarget(MachOOF, &McpuDefault, &ThumbTarget); @@ -237,15 +2568,9 @@ static void DisassembleInputMachO2(StringRef Filename, MCPU = McpuDefault; std::unique_ptr InstrInfo(TheTarget->createMCInstrInfo()); - std::unique_ptr InstrAnalysis( - TheTarget->createMCInstrAnalysis(InstrInfo.get())); std::unique_ptr ThumbInstrInfo; - std::unique_ptr ThumbInstrAnalysis; - if (ThumbTarget) { + if (ThumbTarget) ThumbInstrInfo.reset(ThumbTarget->createMCInstrInfo()); - ThumbInstrAnalysis.reset( - ThumbTarget->createMCInstrAnalysis(ThumbInstrInfo.get())); - } // Package up features to be passed to target/subtarget std::string FeaturesStr; @@ -264,13 +2589,34 @@ static void DisassembleInputMachO2(StringRef Filename, std::unique_ptr STI( TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr)); MCContext Ctx(AsmInfo.get(), MRI.get(), nullptr); - std::unique_ptr DisAsm( + std::unique_ptr DisAsm( TheTarget->createMCDisassembler(*STI, Ctx)); + std::unique_ptr Symbolizer; + struct DisassembleInfo SymbolizerInfo; + std::unique_ptr RelInfo( + TheTarget->createMCRelocationInfo(TripleName, Ctx)); + if (RelInfo) { + Symbolizer.reset(TheTarget->createMCSymbolizer( + TripleName, SymbolizerGetOpInfo, SymbolizerSymbolLookUp, + &SymbolizerInfo, &Ctx, std::move(RelInfo))); + DisAsm->setSymbolizer(std::move(Symbolizer)); + } int AsmPrinterVariant = AsmInfo->getAssemblerDialect(); std::unique_ptr IP(TheTarget->createMCInstPrinter( AsmPrinterVariant, *AsmInfo, *InstrInfo, *MRI, *STI)); - - if (!InstrAnalysis || !AsmInfo || !STI || !DisAsm || !IP) { + // Set the display preference for hex vs. decimal immediates. + IP->setPrintImmHex(PrintImmHex); + // Comment stream and backing vector. + SmallString<128> CommentsToEmit; + raw_svector_ostream CommentStream(CommentsToEmit); + // FIXME: Setting the CommentStream in the InstPrinter is problematic in that + // if it is done then arm64 comments for string literals don't get printed + // and some constant get printed instead and not setting it causes intel + // (32-bit and 64-bit) comments printed with different spacing before the + // comment causing different diffs with the 'C' disassembler library API. + // IP->setCommentStream(CommentStream); + + if (!AsmInfo || !STI || !DisAsm || !IP) { errs() << "error: couldn't initialize disassembler for target " << TripleName << '\n'; return; @@ -280,9 +2626,12 @@ static void DisassembleInputMachO2(StringRef Filename, std::unique_ptr ThumbMRI; std::unique_ptr ThumbAsmInfo; std::unique_ptr ThumbSTI; - std::unique_ptr ThumbDisAsm; + std::unique_ptr ThumbDisAsm; std::unique_ptr ThumbIP; std::unique_ptr ThumbCtx; + std::unique_ptr ThumbSymbolizer; + struct DisassembleInfo ThumbSymbolizerInfo; + std::unique_ptr ThumbRelInfo; if (ThumbTarget) { ThumbMRI.reset(ThumbTarget->createMCRegInfo(ThumbTripleName)); ThumbAsmInfo.reset( @@ -291,21 +2640,29 @@ static void DisassembleInputMachO2(StringRef Filename, ThumbTarget->createMCSubtargetInfo(ThumbTripleName, MCPU, FeaturesStr)); ThumbCtx.reset(new MCContext(ThumbAsmInfo.get(), ThumbMRI.get(), nullptr)); ThumbDisAsm.reset(ThumbTarget->createMCDisassembler(*ThumbSTI, *ThumbCtx)); + MCContext *PtrThumbCtx = ThumbCtx.get(); + ThumbRelInfo.reset( + ThumbTarget->createMCRelocationInfo(ThumbTripleName, *PtrThumbCtx)); + if (ThumbRelInfo) { + ThumbSymbolizer.reset(ThumbTarget->createMCSymbolizer( + ThumbTripleName, SymbolizerGetOpInfo, SymbolizerSymbolLookUp, + &ThumbSymbolizerInfo, PtrThumbCtx, std::move(ThumbRelInfo))); + ThumbDisAsm->setSymbolizer(std::move(ThumbSymbolizer)); + } int ThumbAsmPrinterVariant = ThumbAsmInfo->getAssemblerDialect(); ThumbIP.reset(ThumbTarget->createMCInstPrinter( ThumbAsmPrinterVariant, *ThumbAsmInfo, *ThumbInstrInfo, *ThumbMRI, *ThumbSTI)); + // Set the display preference for hex vs. decimal immediates. + ThumbIP->setPrintImmHex(PrintImmHex); } - if (ThumbTarget && (!ThumbInstrAnalysis || !ThumbAsmInfo || !ThumbSTI || - !ThumbDisAsm || !ThumbIP)) { + if (ThumbTarget && (!ThumbAsmInfo || !ThumbSTI || !ThumbDisAsm || !ThumbIP)) { errs() << "error: couldn't initialize disassembler for target " << ThumbTripleName << '\n'; return; } - outs() << '\n' << Filename << ":\n\n"; - MachO::mach_header Header = MachOOF->getHeader(); // FIXME: Using the -cfg command line option, this code used to be able to @@ -326,7 +2683,7 @@ static void DisassembleInputMachO2(StringRef Filename, // Build a data in code table that is sorted on by the address of each entry. uint64_t BaseAddress = 0; if (Header.filetype == MachO::MH_OBJECT) - Sections[0].getAddress(BaseAddress); + BaseAddress = Sections[0].getAddress(); else BaseAddress = BaseSegmentAddress; DiceTable Dices; @@ -367,35 +2724,34 @@ static void DisassembleInputMachO2(StringRef Filename, diContext.reset(DIContext::getDWARFContext(*DbgObj)); } - for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) { - - bool SectIsText = false; - Sections[SectIdx].isText(SectIsText); - if (SectIsText == false) - continue; + if (DumpSections.size() == 0) + outs() << "(" << DisSegName << "," << DisSectName << ") section\n"; + for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) { StringRef SectName; - if (Sections[SectIdx].getName(SectName) || - SectName != "__text") - continue; // Skip non-text sections + if (Sections[SectIdx].getName(SectName) || SectName != DisSectName) + continue; DataRefImpl DR = Sections[SectIdx].getRawDataRefImpl(); StringRef SegmentName = MachOOF->getSectionFinalSegmentName(DR); - if (SegmentName != "__TEXT") + if (SegmentName != DisSegName) continue; - StringRef Bytes; - Sections[SectIdx].getContents(Bytes); - StringRefMemoryObject memoryObject(Bytes); + StringRef BytesStr; + Sections[SectIdx].getContents(BytesStr); + ArrayRef Bytes(reinterpret_cast(BytesStr.data()), + BytesStr.size()); + uint64_t SectAddress = Sections[SectIdx].getAddress(); + bool symbolTableWorked = false; // Parse relocations. std::vector> Relocs; for (const RelocationRef &Reloc : Sections[SectIdx].relocations()) { - uint64_t RelocOffset, SectionAddress; + uint64_t RelocOffset; Reloc.getOffset(RelocOffset); - Sections[SectIdx].getAddress(SectionAddress); + uint64_t SectionAddress = Sections[SectIdx].getAddress(); RelocOffset -= SectionAddress; symbol_iterator RelocSym = Reloc.getSymbol(); @@ -404,6 +2760,48 @@ static void DisassembleInputMachO2(StringRef Filename, } array_pod_sort(Relocs.begin(), Relocs.end()); + // Create a map of symbol addresses to symbol names for use by + // the SymbolizerSymbolLookUp() routine. + SymbolAddressMap AddrMap; + for (const SymbolRef &Symbol : MachOOF->symbols()) { + SymbolRef::Type ST; + Symbol.getType(ST); + if (ST == SymbolRef::ST_Function || ST == SymbolRef::ST_Data || + ST == SymbolRef::ST_Other) { + uint64_t Address; + Symbol.getAddress(Address); + StringRef SymName; + Symbol.getName(SymName); + AddrMap[Address] = SymName; + } + } + // Set up the block of info used by the Symbolizer call backs. + SymbolizerInfo.verbose = true; + SymbolizerInfo.O = MachOOF; + SymbolizerInfo.S = Sections[SectIdx]; + SymbolizerInfo.AddrMap = &AddrMap; + SymbolizerInfo.Sections = &Sections; + SymbolizerInfo.class_name = nullptr; + SymbolizerInfo.selector_name = nullptr; + SymbolizerInfo.method = nullptr; + SymbolizerInfo.demangled_name = nullptr; + SymbolizerInfo.bindtable = nullptr; + SymbolizerInfo.adrp_addr = 0; + SymbolizerInfo.adrp_inst = 0; + // Same for the ThumbSymbolizer + ThumbSymbolizerInfo.verbose = true; + ThumbSymbolizerInfo.O = MachOOF; + ThumbSymbolizerInfo.S = Sections[SectIdx]; + ThumbSymbolizerInfo.AddrMap = &AddrMap; + ThumbSymbolizerInfo.Sections = &Sections; + ThumbSymbolizerInfo.class_name = nullptr; + ThumbSymbolizerInfo.selector_name = nullptr; + ThumbSymbolizerInfo.method = nullptr; + ThumbSymbolizerInfo.demangled_name = nullptr; + ThumbSymbolizerInfo.bindtable = nullptr; + ThumbSymbolizerInfo.adrp_addr = 0; + ThumbSymbolizerInfo.adrp_inst = 0; + // Disassemble symbol by symbol. for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) { StringRef SymName; @@ -415,15 +2813,13 @@ static void DisassembleInputMachO2(StringRef Filename, continue; // Make sure the symbol is defined in this section. - bool containsSym = false; - Sections[SectIdx].containsSymbol(Symbols[SymIdx], containsSym); + bool containsSym = Sections[SectIdx].containsSymbol(Symbols[SymIdx]); if (!containsSym) continue; // Start at the address of the symbol relative to the section's address. - uint64_t SectionAddress = 0; uint64_t Start = 0; - Sections[SectIdx].getAddress(SectionAddress); + uint64_t SectionAddress = Sections[SectIdx].getAddress(); Symbols[SymIdx].getAddress(Start); Start -= SectionAddress; @@ -431,13 +2827,13 @@ static void DisassembleInputMachO2(StringRef Filename, // the end of the section. bool containsNextSym = false; uint64_t NextSym = 0; - uint64_t NextSymIdx = SymIdx+1; + uint64_t NextSymIdx = SymIdx + 1; while (Symbols.size() > NextSymIdx) { SymbolRef::Type NextSymType; Symbols[NextSymIdx].getType(NextSymType); if (NextSymType == SymbolRef::ST_Function) { - Sections[SectIdx].containsSymbol(Symbols[NextSymIdx], - containsNextSym); + containsNextSym = + Sections[SectIdx].containsSymbol(Symbols[NextSymIdx]); Symbols[NextSymIdx].getAddress(NextSym); NextSym -= SectionAddress; break; @@ -445,9 +2841,8 @@ static void DisassembleInputMachO2(StringRef Filename, ++NextSymIdx; } - uint64_t SectSize; - Sections[SectIdx].getSize(SectSize); - uint64_t End = containsNextSym ? NextSym : SectSize; + uint64_t SectSize = Sections[SectIdx].getSize(); + uint64_t End = containsNextSym ? NextSym : SectSize; uint64_t Size; symbolTableWorked = true; @@ -461,45 +2856,66 @@ static void DisassembleInputMachO2(StringRef Filename, for (uint64_t Index = Start; Index < End; Index += Size) { MCInst Inst; - uint64_t SectAddress = 0; - Sections[SectIdx].getAddress(SectAddress); - outs() << format("%8" PRIx64 ":\t", SectAddress + Index); + uint64_t PC = SectAddress + Index; + if (FullLeadingAddr) { + if (MachOOF->is64Bit()) + outs() << format("%016" PRIx64, PC); + else + outs() << format("%08" PRIx64, PC); + } else { + outs() << format("%8" PRIx64 ":", PC); + } + if (!NoShowRawInsn) + outs() << "\t"; // Check the data in code table here to see if this is data not an // instruction to be disassembled. DiceTable Dice; - Dice.push_back(std::make_pair(SectAddress + Index, DiceRef())); - dice_table_iterator DTI = std::search(Dices.begin(), Dices.end(), - Dice.begin(), Dice.end(), - compareDiceTableEntries); - if (DTI != Dices.end()){ + Dice.push_back(std::make_pair(PC, DiceRef())); + dice_table_iterator DTI = + std::search(Dices.begin(), Dices.end(), Dice.begin(), Dice.end(), + compareDiceTableEntries); + if (DTI != Dices.end()) { uint16_t Length; DTI->second.getLength(Length); - DumpBytes(StringRef(Bytes.data() + Index, Length)); uint16_t Kind; DTI->second.getKind(Kind); - DumpDataInCode(Bytes.data() + Index, Length, Kind); + Size = DumpDataInCode(reinterpret_cast(Bytes.data()) + + Index, + Length, Kind); + if ((Kind == MachO::DICE_KIND_JUMP_TABLE8) && + (PC == (DTI->first + Length - 1)) && (Length & 1)) + Size++; continue; } + SmallVector AnnotationsBytes; + raw_svector_ostream Annotations(AnnotationsBytes); + bool gotInst; if (isThumb) - gotInst = ThumbDisAsm->getInstruction(Inst, Size, memoryObject, Index, - DebugOut, nulls()); + gotInst = ThumbDisAsm->getInstruction(Inst, Size, Bytes.slice(Index), + PC, DebugOut, Annotations); else - gotInst = DisAsm->getInstruction(Inst, Size, memoryObject, Index, - DebugOut, nulls()); + gotInst = DisAsm->getInstruction(Inst, Size, Bytes.slice(Index), PC, + DebugOut, Annotations); if (gotInst) { - DumpBytes(StringRef(Bytes.data() + Index, Size)); + if (!NoShowRawInsn) { + DumpBytes(StringRef( + reinterpret_cast(Bytes.data()) + Index, Size)); + } + formatted_raw_ostream FormattedOS(outs()); + Annotations.flush(); + StringRef AnnotationsStr = Annotations.str(); if (isThumb) - ThumbIP->printInst(&Inst, outs(), ""); + ThumbIP->printInst(&Inst, FormattedOS, AnnotationsStr); else - IP->printInst(&Inst, outs(), ""); + IP->printInst(&Inst, FormattedOS, AnnotationsStr); + emitComments(CommentStream, CommentsToEmit, FormattedOS, *AsmInfo); // Print debug info. if (diContext) { - DILineInfo dli = - diContext->getLineInfoForAddress(SectAddress + Index); + DILineInfo dli = diContext->getLineInfoForAddress(PC); // Print valid line info if it changed. if (dli != lastLine && dli.Line != 0) outs() << "\t## " << dli.FileName << ':' << dli.Line << ':' @@ -508,39 +2924,87 @@ static void DisassembleInputMachO2(StringRef Filename, } outs() << "\n"; } else { - errs() << "llvm-objdump: warning: invalid instruction encoding\n"; - if (Size == 0) - Size = 1; // skip illegible bytes + unsigned int Arch = MachOOF->getArch(); + if (Arch == Triple::x86_64 || Arch == Triple::x86) { + outs() << format("\t.byte 0x%02x #bad opcode\n", + *(Bytes.data() + Index) & 0xff); + Size = 1; // skip exactly one illegible byte and move on. + } else if (Arch == Triple::aarch64) { + uint32_t opcode = (*(Bytes.data() + Index) & 0xff) | + (*(Bytes.data() + Index + 1) & 0xff) << 8 | + (*(Bytes.data() + Index + 2) & 0xff) << 16 | + (*(Bytes.data() + Index + 3) & 0xff) << 24; + outs() << format("\t.long\t0x%08x\n", opcode); + Size = 4; + } else { + errs() << "llvm-objdump: warning: invalid instruction encoding\n"; + if (Size == 0) + Size = 1; // skip illegible bytes + } } } } if (!symbolTableWorked) { - // Reading the symbol table didn't work, disassemble the whole section. - uint64_t SectAddress; - Sections[SectIdx].getAddress(SectAddress); - uint64_t SectSize; - Sections[SectIdx].getSize(SectSize); + // Reading the symbol table didn't work, disassemble the whole section. + uint64_t SectAddress = Sections[SectIdx].getAddress(); + uint64_t SectSize = Sections[SectIdx].getSize(); uint64_t InstSize; for (uint64_t Index = 0; Index < SectSize; Index += InstSize) { MCInst Inst; - if (DisAsm->getInstruction(Inst, InstSize, memoryObject, Index, + uint64_t PC = SectAddress + Index; + if (DisAsm->getInstruction(Inst, InstSize, Bytes.slice(Index), PC, DebugOut, nulls())) { - outs() << format("%8" PRIx64 ":\t", SectAddress + Index); - DumpBytes(StringRef(Bytes.data() + Index, InstSize)); + if (FullLeadingAddr) { + if (MachOOF->is64Bit()) + outs() << format("%016" PRIx64, PC); + else + outs() << format("%08" PRIx64, PC); + } else { + outs() << format("%8" PRIx64 ":", PC); + } + if (!NoShowRawInsn) { + outs() << "\t"; + DumpBytes( + StringRef(reinterpret_cast(Bytes.data()) + Index, + InstSize)); + } IP->printInst(&Inst, outs(), ""); outs() << "\n"; } else { - errs() << "llvm-objdump: warning: invalid instruction encoding\n"; - if (InstSize == 0) - InstSize = 1; // skip illegible bytes + unsigned int Arch = MachOOF->getArch(); + if (Arch == Triple::x86_64 || Arch == Triple::x86) { + outs() << format("\t.byte 0x%02x #bad opcode\n", + *(Bytes.data() + Index) & 0xff); + InstSize = 1; // skip exactly one illegible byte and move on. + } else { + errs() << "llvm-objdump: warning: invalid instruction encoding\n"; + if (InstSize == 0) + InstSize = 1; // skip illegible bytes + } } } } + // The TripleName's need to be reset if we are called again for a different + // archtecture. + TripleName = ""; + ThumbTripleName = ""; + + if (SymbolizerInfo.method != nullptr) + free(SymbolizerInfo.method); + if (SymbolizerInfo.demangled_name != nullptr) + free(SymbolizerInfo.demangled_name); + if (SymbolizerInfo.bindtable != nullptr) + delete SymbolizerInfo.bindtable; + if (ThumbSymbolizerInfo.method != nullptr) + free(ThumbSymbolizerInfo.method); + if (ThumbSymbolizerInfo.demangled_name != nullptr) + free(ThumbSymbolizerInfo.demangled_name); + if (ThumbSymbolizerInfo.bindtable != nullptr) + delete ThumbSymbolizerInfo.bindtable; } } - //===----------------------------------------------------------------------===// // __compact_unwind section dumping //===----------------------------------------------------------------------===// @@ -548,13 +3012,13 @@ static void DisassembleInputMachO2(StringRef Filename, namespace { template static uint64_t readNext(const char *&Buf) { - using llvm::support::little; - using llvm::support::unaligned; + using llvm::support::little; + using llvm::support::unaligned; - uint64_t Val = support::endian::read(Buf); - Buf += sizeof(T); - return Val; - } + uint64_t Val = support::endian::read(Buf); + Buf += sizeof(T); + return Val; +} struct CompactUnwindEntry { uint32_t OffsetInSection; @@ -570,7 +3034,7 @@ struct CompactUnwindEntry { RelocationRef LSDAReloc; CompactUnwindEntry(StringRef Contents, unsigned Offset, bool Is64) - : OffsetInSection(Offset) { + : OffsetInSection(Offset) { if (Is64) read(Contents.data() + Offset); else @@ -578,8 +3042,7 @@ struct CompactUnwindEntry { } private: - template - void read(const char *Buf) { + template void read(const char *Buf) { FunctionAddr = readNext(Buf); Length = readNext(Buf); CompactEncoding = readNext(Buf); @@ -601,8 +3064,7 @@ private: /// referenced section. static void findUnwindRelocNameAddend(const MachOObjectFile *Obj, std::map &Symbols, - const RelocationRef &Reloc, - uint64_t Addr, + const RelocationRef &Reloc, uint64_t Addr, StringRef &Name, uint64_t &Addend) { if (Reloc.getSymbol() != Obj->symbol_end()) { Reloc.getSymbol()->getName(Name); @@ -613,8 +3075,7 @@ static void findUnwindRelocNameAddend(const MachOObjectFile *Obj, auto RE = Obj->getRelocation(Reloc.getRawDataRefImpl()); SectionRef RelocSection = Obj->getRelocationSection(RE); - uint64_t SectionAddr; - RelocSection.getAddress(SectionAddr); + uint64_t SectionAddr = RelocSection.getAddress(); auto Sym = Symbols.upper_bound(Addr); if (Sym == Symbols.begin()) { @@ -645,11 +3106,13 @@ static void findUnwindRelocNameAddend(const MachOObjectFile *Obj, static void printUnwindRelocDest(const MachOObjectFile *Obj, std::map &Symbols, - const RelocationRef &Reloc, - uint64_t Addr) { + const RelocationRef &Reloc, uint64_t Addr) { StringRef Name; uint64_t Addend; + if (!Reloc.getObjectFile()) + return; + findUnwindRelocNameAddend(Obj, Symbols, Reloc, Addr, Name, Addend); outs() << Name; @@ -707,15 +3170,14 @@ printMachOCompactUnwindSection(const MachOObjectFile *Obj, << format("0x%" PRIx32, Entry.OffsetInSection) << ":\n"; // 1. Start of the region this entry applies to. - outs() << " start: " - << format("0x%" PRIx64, Entry.FunctionAddr) << ' '; - printUnwindRelocDest(Obj, Symbols, Entry.FunctionReloc, - Entry.FunctionAddr); + outs() << " start: " << format("0x%" PRIx64, + Entry.FunctionAddr) << ' '; + printUnwindRelocDest(Obj, Symbols, Entry.FunctionReloc, Entry.FunctionAddr); outs() << '\n'; // 2. Length of the region this entry applies to. - outs() << " length: " - << format("0x%" PRIx32, Entry.Length) << '\n'; + outs() << " length: " << format("0x%" PRIx32, Entry.Length) + << '\n'; // 3. The 32-bit compact encoding. outs() << " compact encoding: " << format("0x%08" PRIx32, Entry.CompactEncoding) << '\n'; @@ -731,8 +3193,8 @@ printMachOCompactUnwindSection(const MachOObjectFile *Obj, // 5. This entry's language-specific data area. if (Entry.LSDAReloc.getObjectFile()) { - outs() << " LSDA: " - << format("0x%" PRIx64, Entry.LSDAAddr) << ' '; + outs() << " LSDA: " << format("0x%" PRIx64, + Entry.LSDAAddr) << ' '; printUnwindRelocDest(Obj, Symbols, Entry.LSDAReloc, Entry.LSDAAddr); outs() << '\n'; } @@ -758,11 +3220,9 @@ static void printRegularSecondLevelUnwindPage(const char *PageStart) { uint32_t Encoding = readNext(Pos); outs() << " [" << i << "]: " - << "function offset=" - << format("0x%08" PRIx32, FunctionOffset) << ", " - << "encoding=" - << format("0x%08" PRIx32, Encoding) - << '\n'; + << "function offset=" << format("0x%08" PRIx32, FunctionOffset) + << ", " + << "encoding=" << format("0x%08" PRIx32, Encoding) << '\n'; } } @@ -795,18 +3255,16 @@ static void printCompressedSecondLevelUnwindPage( Encoding = PageEncodings[EncodingIdx - CommonEncodings.size()]; outs() << " [" << i << "]: " - << "function offset=" - << format("0x%08" PRIx32, FunctionOffset) << ", " - << "encoding[" << EncodingIdx << "]=" - << format("0x%08" PRIx32, Encoding) - << '\n'; + << "function offset=" << format("0x%08" PRIx32, FunctionOffset) + << ", " + << "encoding[" << EncodingIdx + << "]=" << format("0x%08" PRIx32, Encoding) << '\n'; } } -static void -printMachOUnwindInfoSection(const MachOObjectFile *Obj, - std::map &Symbols, - const SectionRef &UnwindInfo) { +static void printMachOUnwindInfoSection(const MachOObjectFile *Obj, + std::map &Symbols, + const SectionRef &UnwindInfo) { assert(Obj->isLittleEndian() && "There should not be a big-endian .o with __unwind_info"); @@ -867,7 +3325,6 @@ printMachOUnwindInfoSection(const MachOObjectFile *Obj, << '\n'; } - //===---------------------------------- // Personality functions used in this executable //===---------------------------------- @@ -909,15 +3366,13 @@ printMachOUnwindInfoSection(const MachOObjectFile *Obj, IndexEntries.push_back(Entry); outs() << " [" << i << "]: " - << "function offset=" - << format("0x%08" PRIx32, Entry.FunctionOffset) << ", " + << "function offset=" << format("0x%08" PRIx32, Entry.FunctionOffset) + << ", " << "2nd level page offset=" << format("0x%08" PRIx32, Entry.SecondLevelPageStart) << ", " - << "LSDA offset=" - << format("0x%08" PRIx32, Entry.LSDAStart) << '\n'; + << "LSDA offset=" << format("0x%08" PRIx32, Entry.LSDAStart) << '\n'; } - //===---------------------------------- // Next come the LSDA tables //===---------------------------------- @@ -933,10 +3388,9 @@ printMachOUnwindInfoSection(const MachOObjectFile *Obj, uint32_t FunctionOffset = readNext(Pos); uint32_t LSDAOffset = readNext(Pos); outs() << " [" << i << "]: " - << "function offset=" - << format("0x%08" PRIx32, FunctionOffset) << ", " - << "LSDA offset=" - << format("0x%08" PRIx32, LSDAOffset) << '\n'; + << "function offset=" << format("0x%08" PRIx32, FunctionOffset) + << ", " + << "LSDA offset=" << format("0x%08" PRIx32, LSDAOffset) << '\n'; } //===---------------------------------- @@ -969,7 +3423,6 @@ printMachOUnwindInfoSection(const MachOObjectFile *Obj, CommonEncodings); else llvm_unreachable("Do not know how to print this kind of 2nd level page"); - } } @@ -997,7 +3450,6 @@ void llvm::printMachOUnwindInfo(const MachOObjectFile *Obj) { printMachOUnwindInfoSection(Obj, Symbols, Section); else if (SectName == "__eh_frame") outs() << "llvm-objdump: warning: unhandled __eh_frame section\n"; - } } @@ -1029,12 +3481,17 @@ static void PrintMachHeader(uint32_t magic, uint32_t cputype, break; case MachO::CPU_TYPE_X86_64: outs() << " X86_64"; - case MachO::CPU_SUBTYPE_X86_64_ALL: - outs() << " ALL"; - break; - case MachO::CPU_SUBTYPE_X86_64_H: - outs() << " Haswell"; - outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK); + switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) { + case MachO::CPU_SUBTYPE_X86_64_ALL: + outs() << " ALL"; + break; + case MachO::CPU_SUBTYPE_X86_64_H: + outs() << " Haswell"; + break; + default: + outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK); + break; + } break; case MachO::CPU_TYPE_ARM: outs() << " ARM"; @@ -1112,7 +3569,7 @@ static void PrintMachHeader(uint32_t magic, uint32_t cputype, break; } if ((cpusubtype & MachO::CPU_SUBTYPE_MASK) == MachO::CPU_SUBTYPE_LIB64) { - outs() << " LIB64 "; + outs() << " LIB64"; } else { outs() << format(" 0x%02" PRIx32, (cpusubtype & MachO::CPU_SUBTYPE_MASK) >> 24); @@ -1299,8 +3756,8 @@ static void PrintSegmentCommand(uint32_t cmd, uint32_t cmdsize, outs() << " vmaddr " << format("0x%016" PRIx64, vmaddr) << "\n"; outs() << " vmsize " << format("0x%016" PRIx64, vmsize) << "\n"; } else { - outs() << " vmaddr " << format("0x%08" PRIx32, vmaddr) << "\n"; - outs() << " vmsize " << format("0x%08" PRIx32, vmsize) << "\n"; + outs() << " vmaddr " << format("0x%08" PRIx64, vmaddr) << "\n"; + outs() << " vmsize " << format("0x%08" PRIx64, vmsize) << "\n"; } outs() << " fileoff " << fileoff; if (fileoff > object_size) @@ -1403,8 +3860,8 @@ static void PrintSection(const char *sectname, const char *segname, outs() << " addr " << format("0x%016" PRIx64, addr) << "\n"; outs() << " size " << format("0x%016" PRIx64, size); } else { - outs() << " addr " << format("0x%08" PRIx32, addr) << "\n"; - outs() << " size " << format("0x%08" PRIx32, size); + outs() << " addr " << format("0x%08" PRIx64, addr) << "\n"; + outs() << " size " << format("0x%08" PRIx64, size); } if ((flags & MachO::S_ZEROFILL) != 0 && offset + size > object_size) outs() << " (past end of file)\n"; @@ -1517,7 +3974,7 @@ static void PrintSection(const char *sectname, const char *segname, outs() << "\n"; } -static void PrintSymtabLoadCommand(MachO::symtab_command st, uint32_t cputype, +static void PrintSymtabLoadCommand(MachO::symtab_command st, bool Is64Bit, uint32_t object_size) { outs() << " cmd LC_SYMTAB\n"; outs() << " cmdsize " << st.cmdsize; @@ -1532,7 +3989,7 @@ static void PrintSymtabLoadCommand(MachO::symtab_command st, uint32_t cputype, outs() << "\n"; outs() << " nsyms " << st.nsyms; uint64_t big_size; - if (cputype & MachO::CPU_ARCH_ABI64) { + if (Is64Bit) { big_size = st.nsyms; big_size *= sizeof(struct MachO::nlist_64); big_size += st.symoff; @@ -1563,133 +4020,936 @@ static void PrintSymtabLoadCommand(MachO::symtab_command st, uint32_t cputype, outs() << "\n"; } -static void PrintDysymtabLoadCommand(MachO::dysymtab_command dyst, - uint32_t nsyms, uint32_t object_size, - uint32_t cputype) { - outs() << " cmd LC_DYSYMTAB\n"; - outs() << " cmdsize " << dyst.cmdsize; - if (dyst.cmdsize != sizeof(struct MachO::dysymtab_command)) +static void PrintDysymtabLoadCommand(MachO::dysymtab_command dyst, + uint32_t nsyms, uint32_t object_size, + bool Is64Bit) { + outs() << " cmd LC_DYSYMTAB\n"; + outs() << " cmdsize " << dyst.cmdsize; + if (dyst.cmdsize != sizeof(struct MachO::dysymtab_command)) + outs() << " Incorrect size\n"; + else + outs() << "\n"; + outs() << " ilocalsym " << dyst.ilocalsym; + if (dyst.ilocalsym > nsyms) + outs() << " (greater than the number of symbols)\n"; + else + outs() << "\n"; + outs() << " nlocalsym " << dyst.nlocalsym; + uint64_t big_size; + big_size = dyst.ilocalsym; + big_size += dyst.nlocalsym; + if (big_size > nsyms) + outs() << " (past the end of the symbol table)\n"; + else + outs() << "\n"; + outs() << " iextdefsym " << dyst.iextdefsym; + if (dyst.iextdefsym > nsyms) + outs() << " (greater than the number of symbols)\n"; + else + outs() << "\n"; + outs() << " nextdefsym " << dyst.nextdefsym; + big_size = dyst.iextdefsym; + big_size += dyst.nextdefsym; + if (big_size > nsyms) + outs() << " (past the end of the symbol table)\n"; + else + outs() << "\n"; + outs() << " iundefsym " << dyst.iundefsym; + if (dyst.iundefsym > nsyms) + outs() << " (greater than the number of symbols)\n"; + else + outs() << "\n"; + outs() << " nundefsym " << dyst.nundefsym; + big_size = dyst.iundefsym; + big_size += dyst.nundefsym; + if (big_size > nsyms) + outs() << " (past the end of the symbol table)\n"; + else + outs() << "\n"; + outs() << " tocoff " << dyst.tocoff; + if (dyst.tocoff > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " ntoc " << dyst.ntoc; + big_size = dyst.ntoc; + big_size *= sizeof(struct MachO::dylib_table_of_contents); + big_size += dyst.tocoff; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " modtaboff " << dyst.modtaboff; + if (dyst.modtaboff > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " nmodtab " << dyst.nmodtab; + uint64_t modtabend; + if (Is64Bit) { + modtabend = dyst.nmodtab; + modtabend *= sizeof(struct MachO::dylib_module_64); + modtabend += dyst.modtaboff; + } else { + modtabend = dyst.nmodtab; + modtabend *= sizeof(struct MachO::dylib_module); + modtabend += dyst.modtaboff; + } + if (modtabend > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " extrefsymoff " << dyst.extrefsymoff; + if (dyst.extrefsymoff > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " nextrefsyms " << dyst.nextrefsyms; + big_size = dyst.nextrefsyms; + big_size *= sizeof(struct MachO::dylib_reference); + big_size += dyst.extrefsymoff; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " indirectsymoff " << dyst.indirectsymoff; + if (dyst.indirectsymoff > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " nindirectsyms " << dyst.nindirectsyms; + big_size = dyst.nindirectsyms; + big_size *= sizeof(uint32_t); + big_size += dyst.indirectsymoff; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " extreloff " << dyst.extreloff; + if (dyst.extreloff > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " nextrel " << dyst.nextrel; + big_size = dyst.nextrel; + big_size *= sizeof(struct MachO::relocation_info); + big_size += dyst.extreloff; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " locreloff " << dyst.locreloff; + if (dyst.locreloff > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " nlocrel " << dyst.nlocrel; + big_size = dyst.nlocrel; + big_size *= sizeof(struct MachO::relocation_info); + big_size += dyst.locreloff; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; +} + +static void PrintDyldInfoLoadCommand(MachO::dyld_info_command dc, + uint32_t object_size) { + if (dc.cmd == MachO::LC_DYLD_INFO) + outs() << " cmd LC_DYLD_INFO\n"; + else + outs() << " cmd LC_DYLD_INFO_ONLY\n"; + outs() << " cmdsize " << dc.cmdsize; + if (dc.cmdsize != sizeof(struct MachO::dyld_info_command)) + outs() << " Incorrect size\n"; + else + outs() << "\n"; + outs() << " rebase_off " << dc.rebase_off; + if (dc.rebase_off > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " rebase_size " << dc.rebase_size; + uint64_t big_size; + big_size = dc.rebase_off; + big_size += dc.rebase_size; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " bind_off " << dc.bind_off; + if (dc.bind_off > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " bind_size " << dc.bind_size; + big_size = dc.bind_off; + big_size += dc.bind_size; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " weak_bind_off " << dc.weak_bind_off; + if (dc.weak_bind_off > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " weak_bind_size " << dc.weak_bind_size; + big_size = dc.weak_bind_off; + big_size += dc.weak_bind_size; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " lazy_bind_off " << dc.lazy_bind_off; + if (dc.lazy_bind_off > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " lazy_bind_size " << dc.lazy_bind_size; + big_size = dc.lazy_bind_off; + big_size += dc.lazy_bind_size; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " export_off " << dc.export_off; + if (dc.export_off > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; + outs() << " export_size " << dc.export_size; + big_size = dc.export_off; + big_size += dc.export_size; + if (big_size > object_size) + outs() << " (past end of file)\n"; + else + outs() << "\n"; +} + +static void PrintDyldLoadCommand(MachO::dylinker_command dyld, + const char *Ptr) { + if (dyld.cmd == MachO::LC_ID_DYLINKER) + outs() << " cmd LC_ID_DYLINKER\n"; + else if (dyld.cmd == MachO::LC_LOAD_DYLINKER) + outs() << " cmd LC_LOAD_DYLINKER\n"; + else if (dyld.cmd == MachO::LC_DYLD_ENVIRONMENT) + outs() << " cmd LC_DYLD_ENVIRONMENT\n"; + else + outs() << " cmd ?(" << dyld.cmd << ")\n"; + outs() << " cmdsize " << dyld.cmdsize; + if (dyld.cmdsize < sizeof(struct MachO::dylinker_command)) + outs() << " Incorrect size\n"; + else + outs() << "\n"; + if (dyld.name >= dyld.cmdsize) + outs() << " name ?(bad offset " << dyld.name << ")\n"; + else { + const char *P = (const char *)(Ptr) + dyld.name; + outs() << " name " << P << " (offset " << dyld.name << ")\n"; + } +} + +static void PrintUuidLoadCommand(MachO::uuid_command uuid) { + outs() << " cmd LC_UUID\n"; + outs() << " cmdsize " << uuid.cmdsize; + if (uuid.cmdsize != sizeof(struct MachO::uuid_command)) + outs() << " Incorrect size\n"; + else + outs() << "\n"; + outs() << " uuid "; + outs() << format("%02" PRIX32, uuid.uuid[0]); + outs() << format("%02" PRIX32, uuid.uuid[1]); + outs() << format("%02" PRIX32, uuid.uuid[2]); + outs() << format("%02" PRIX32, uuid.uuid[3]); + outs() << "-"; + outs() << format("%02" PRIX32, uuid.uuid[4]); + outs() << format("%02" PRIX32, uuid.uuid[5]); + outs() << "-"; + outs() << format("%02" PRIX32, uuid.uuid[6]); + outs() << format("%02" PRIX32, uuid.uuid[7]); + outs() << "-"; + outs() << format("%02" PRIX32, uuid.uuid[8]); + outs() << format("%02" PRIX32, uuid.uuid[9]); + outs() << "-"; + outs() << format("%02" PRIX32, uuid.uuid[10]); + outs() << format("%02" PRIX32, uuid.uuid[11]); + outs() << format("%02" PRIX32, uuid.uuid[12]); + outs() << format("%02" PRIX32, uuid.uuid[13]); + outs() << format("%02" PRIX32, uuid.uuid[14]); + outs() << format("%02" PRIX32, uuid.uuid[15]); + outs() << "\n"; +} + +static void PrintRpathLoadCommand(MachO::rpath_command rpath, const char *Ptr) { + outs() << " cmd LC_RPATH\n"; + outs() << " cmdsize " << rpath.cmdsize; + if (rpath.cmdsize < sizeof(struct MachO::rpath_command)) + outs() << " Incorrect size\n"; + else + outs() << "\n"; + if (rpath.path >= rpath.cmdsize) + outs() << " path ?(bad offset " << rpath.path << ")\n"; + else { + const char *P = (const char *)(Ptr) + rpath.path; + outs() << " path " << P << " (offset " << rpath.path << ")\n"; + } +} + +static void PrintVersionMinLoadCommand(MachO::version_min_command vd) { + if (vd.cmd == MachO::LC_VERSION_MIN_MACOSX) + outs() << " cmd LC_VERSION_MIN_MACOSX\n"; + else if (vd.cmd == MachO::LC_VERSION_MIN_IPHONEOS) + outs() << " cmd LC_VERSION_MIN_IPHONEOS\n"; + else + outs() << " cmd " << vd.cmd << " (?)\n"; + outs() << " cmdsize " << vd.cmdsize; + if (vd.cmdsize != sizeof(struct MachO::version_min_command)) + outs() << " Incorrect size\n"; + else + outs() << "\n"; + outs() << " version " << ((vd.version >> 16) & 0xffff) << "." + << ((vd.version >> 8) & 0xff); + if ((vd.version & 0xff) != 0) + outs() << "." << (vd.version & 0xff); + outs() << "\n"; + if (vd.sdk == 0) + outs() << " sdk n/a"; + else { + outs() << " sdk " << ((vd.sdk >> 16) & 0xffff) << "." + << ((vd.sdk >> 8) & 0xff); + } + if ((vd.sdk & 0xff) != 0) + outs() << "." << (vd.sdk & 0xff); + outs() << "\n"; +} + +static void PrintSourceVersionCommand(MachO::source_version_command sd) { + outs() << " cmd LC_SOURCE_VERSION\n"; + outs() << " cmdsize " << sd.cmdsize; + if (sd.cmdsize != sizeof(struct MachO::source_version_command)) + outs() << " Incorrect size\n"; + else + outs() << "\n"; + uint64_t a = (sd.version >> 40) & 0xffffff; + uint64_t b = (sd.version >> 30) & 0x3ff; + uint64_t c = (sd.version >> 20) & 0x3ff; + uint64_t d = (sd.version >> 10) & 0x3ff; + uint64_t e = sd.version & 0x3ff; + outs() << " version " << a << "." << b; + if (e != 0) + outs() << "." << c << "." << d << "." << e; + else if (d != 0) + outs() << "." << c << "." << d; + else if (c != 0) + outs() << "." << c; + outs() << "\n"; +} + +static void PrintEntryPointCommand(MachO::entry_point_command ep) { + outs() << " cmd LC_MAIN\n"; + outs() << " cmdsize " << ep.cmdsize; + if (ep.cmdsize != sizeof(struct MachO::entry_point_command)) + outs() << " Incorrect size\n"; + else + outs() << "\n"; + outs() << " entryoff " << ep.entryoff << "\n"; + outs() << " stacksize " << ep.stacksize << "\n"; +} + +static void PrintEncryptionInfoCommand(MachO::encryption_info_command ec, + uint32_t object_size) { + outs() << " cmd LC_ENCRYPTION_INFO\n"; + outs() << " cmdsize " << ec.cmdsize; + if (ec.cmdsize != sizeof(struct MachO::encryption_info_command)) outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " ilocalsym " << dyst.ilocalsym; - if (dyst.ilocalsym > nsyms) - outs() << " (greater than the number of symbols)\n"; + outs() << " cryptoff " << ec.cryptoff; + if (ec.cryptoff > object_size) + outs() << " (past end of file)\n"; else outs() << "\n"; - outs() << " nlocalsym " << dyst.nlocalsym; - uint64_t big_size; - big_size = dyst.ilocalsym; - big_size += dyst.nlocalsym; - if (big_size > nsyms) - outs() << " (past the end of the symbol table)\n"; + outs() << " cryptsize " << ec.cryptsize; + if (ec.cryptsize > object_size) + outs() << " (past end of file)\n"; else outs() << "\n"; - outs() << " iextdefsym " << dyst.iextdefsym; - if (dyst.iextdefsym > nsyms) - outs() << " (greater than the number of symbols)\n"; + outs() << " cryptid " << ec.cryptid << "\n"; +} + +static void PrintEncryptionInfoCommand64(MachO::encryption_info_command_64 ec, + uint32_t object_size) { + outs() << " cmd LC_ENCRYPTION_INFO_64\n"; + outs() << " cmdsize " << ec.cmdsize; + if (ec.cmdsize != sizeof(struct MachO::encryption_info_command_64)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " nextdefsym " << dyst.nextdefsym; - big_size = dyst.iextdefsym; - big_size += dyst.nextdefsym; - if (big_size > nsyms) - outs() << " (past the end of the symbol table)\n"; + outs() << " cryptoff " << ec.cryptoff; + if (ec.cryptoff > object_size) + outs() << " (past end of file)\n"; else outs() << "\n"; - outs() << " iundefsym " << dyst.iundefsym; - if (dyst.iundefsym > nsyms) - outs() << " (greater than the number of symbols)\n"; + outs() << " cryptsize " << ec.cryptsize; + if (ec.cryptsize > object_size) + outs() << " (past end of file)\n"; else outs() << "\n"; - outs() << " nundefsym " << dyst.nundefsym; - big_size = dyst.iundefsym; - big_size += dyst.nundefsym; - if (big_size > nsyms) - outs() << " (past the end of the symbol table)\n"; + outs() << " cryptid " << ec.cryptid << "\n"; + outs() << " pad " << ec.pad << "\n"; +} + +static void PrintLinkerOptionCommand(MachO::linker_option_command lo, + const char *Ptr) { + outs() << " cmd LC_LINKER_OPTION\n"; + outs() << " cmdsize " << lo.cmdsize; + if (lo.cmdsize < sizeof(struct MachO::linker_option_command)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " tocoff " << dyst.tocoff; - if (dyst.tocoff > object_size) - outs() << " (past end of file)\n"; + outs() << " count " << lo.count << "\n"; + const char *string = Ptr + sizeof(struct MachO::linker_option_command); + uint32_t left = lo.cmdsize - sizeof(struct MachO::linker_option_command); + uint32_t i = 0; + while (left > 0) { + while (*string == '\0' && left > 0) { + string++; + left--; + } + if (left > 0) { + i++; + outs() << " string #" << i << " " << format("%.*s\n", left, string); + uint32_t NullPos = StringRef(string, left).find('\0'); + uint32_t len = std::min(NullPos, left) + 1; + string += len; + left -= len; + } + } + if (lo.count != i) + outs() << " count " << lo.count << " does not match number of strings " + << i << "\n"; +} + +static void PrintSubFrameworkCommand(MachO::sub_framework_command sub, + const char *Ptr) { + outs() << " cmd LC_SUB_FRAMEWORK\n"; + outs() << " cmdsize " << sub.cmdsize; + if (sub.cmdsize < sizeof(struct MachO::sub_framework_command)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " ntoc " << dyst.ntoc; - big_size = dyst.ntoc; - big_size *= sizeof(struct MachO::dylib_table_of_contents); - big_size += dyst.tocoff; - if (big_size > object_size) - outs() << " (past end of file)\n"; + if (sub.umbrella < sub.cmdsize) { + const char *P = Ptr + sub.umbrella; + outs() << " umbrella " << P << " (offset " << sub.umbrella << ")\n"; + } else { + outs() << " umbrella ?(bad offset " << sub.umbrella << ")\n"; + } +} + +static void PrintSubUmbrellaCommand(MachO::sub_umbrella_command sub, + const char *Ptr) { + outs() << " cmd LC_SUB_UMBRELLA\n"; + outs() << " cmdsize " << sub.cmdsize; + if (sub.cmdsize < sizeof(struct MachO::sub_umbrella_command)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " modtaboff " << dyst.modtaboff; - if (dyst.modtaboff > object_size) - outs() << " (past end of file)\n"; + if (sub.sub_umbrella < sub.cmdsize) { + const char *P = Ptr + sub.sub_umbrella; + outs() << " sub_umbrella " << P << " (offset " << sub.sub_umbrella << ")\n"; + } else { + outs() << " sub_umbrella ?(bad offset " << sub.sub_umbrella << ")\n"; + } +} + +static void PrintSubLibraryCommand(MachO::sub_library_command sub, + const char *Ptr) { + outs() << " cmd LC_SUB_LIBRARY\n"; + outs() << " cmdsize " << sub.cmdsize; + if (sub.cmdsize < sizeof(struct MachO::sub_library_command)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " nmodtab " << dyst.nmodtab; - uint64_t modtabend; - if (cputype & MachO::CPU_ARCH_ABI64) { - modtabend = dyst.nmodtab; - modtabend *= sizeof(struct MachO::dylib_module_64); - modtabend += dyst.modtaboff; + if (sub.sub_library < sub.cmdsize) { + const char *P = Ptr + sub.sub_library; + outs() << " sub_library " << P << " (offset " << sub.sub_library << ")\n"; } else { - modtabend = dyst.nmodtab; - modtabend *= sizeof(struct MachO::dylib_module); - modtabend += dyst.modtaboff; + outs() << " sub_library ?(bad offset " << sub.sub_library << ")\n"; } - if (modtabend > object_size) - outs() << " (past end of file)\n"; +} + +static void PrintSubClientCommand(MachO::sub_client_command sub, + const char *Ptr) { + outs() << " cmd LC_SUB_CLIENT\n"; + outs() << " cmdsize " << sub.cmdsize; + if (sub.cmdsize < sizeof(struct MachO::sub_client_command)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " extrefsymoff " << dyst.extrefsymoff; - if (dyst.extrefsymoff > object_size) - outs() << " (past end of file)\n"; + if (sub.client < sub.cmdsize) { + const char *P = Ptr + sub.client; + outs() << " client " << P << " (offset " << sub.client << ")\n"; + } else { + outs() << " client ?(bad offset " << sub.client << ")\n"; + } +} + +static void PrintRoutinesCommand(MachO::routines_command r) { + outs() << " cmd LC_ROUTINES\n"; + outs() << " cmdsize " << r.cmdsize; + if (r.cmdsize != sizeof(struct MachO::routines_command)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " nextrefsyms " << dyst.nextrefsyms; - big_size = dyst.nextrefsyms; - big_size *= sizeof(struct MachO::dylib_reference); - big_size += dyst.extrefsymoff; - if (big_size > object_size) - outs() << " (past end of file)\n"; + outs() << " init_address " << format("0x%08" PRIx32, r.init_address) << "\n"; + outs() << " init_module " << r.init_module << "\n"; + outs() << " reserved1 " << r.reserved1 << "\n"; + outs() << " reserved2 " << r.reserved2 << "\n"; + outs() << " reserved3 " << r.reserved3 << "\n"; + outs() << " reserved4 " << r.reserved4 << "\n"; + outs() << " reserved5 " << r.reserved5 << "\n"; + outs() << " reserved6 " << r.reserved6 << "\n"; +} + +static void PrintRoutinesCommand64(MachO::routines_command_64 r) { + outs() << " cmd LC_ROUTINES_64\n"; + outs() << " cmdsize " << r.cmdsize; + if (r.cmdsize != sizeof(struct MachO::routines_command_64)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " indirectsymoff " << dyst.indirectsymoff; - if (dyst.indirectsymoff > object_size) - outs() << " (past end of file)\n"; + outs() << " init_address " << format("0x%016" PRIx64, r.init_address) << "\n"; + outs() << " init_module " << r.init_module << "\n"; + outs() << " reserved1 " << r.reserved1 << "\n"; + outs() << " reserved2 " << r.reserved2 << "\n"; + outs() << " reserved3 " << r.reserved3 << "\n"; + outs() << " reserved4 " << r.reserved4 << "\n"; + outs() << " reserved5 " << r.reserved5 << "\n"; + outs() << " reserved6 " << r.reserved6 << "\n"; +} + +static void Print_x86_thread_state64_t(MachO::x86_thread_state64_t &cpu64) { + outs() << " rax " << format("0x%016" PRIx64, cpu64.rax); + outs() << " rbx " << format("0x%016" PRIx64, cpu64.rbx); + outs() << " rcx " << format("0x%016" PRIx64, cpu64.rcx) << "\n"; + outs() << " rdx " << format("0x%016" PRIx64, cpu64.rdx); + outs() << " rdi " << format("0x%016" PRIx64, cpu64.rdi); + outs() << " rsi " << format("0x%016" PRIx64, cpu64.rsi) << "\n"; + outs() << " rbp " << format("0x%016" PRIx64, cpu64.rbp); + outs() << " rsp " << format("0x%016" PRIx64, cpu64.rsp); + outs() << " r8 " << format("0x%016" PRIx64, cpu64.r8) << "\n"; + outs() << " r9 " << format("0x%016" PRIx64, cpu64.r9); + outs() << " r10 " << format("0x%016" PRIx64, cpu64.r10); + outs() << " r11 " << format("0x%016" PRIx64, cpu64.r11) << "\n"; + outs() << " r12 " << format("0x%016" PRIx64, cpu64.r12); + outs() << " r13 " << format("0x%016" PRIx64, cpu64.r13); + outs() << " r14 " << format("0x%016" PRIx64, cpu64.r14) << "\n"; + outs() << " r15 " << format("0x%016" PRIx64, cpu64.r15); + outs() << " rip " << format("0x%016" PRIx64, cpu64.rip) << "\n"; + outs() << "rflags " << format("0x%016" PRIx64, cpu64.rflags); + outs() << " cs " << format("0x%016" PRIx64, cpu64.cs); + outs() << " fs " << format("0x%016" PRIx64, cpu64.fs) << "\n"; + outs() << " gs " << format("0x%016" PRIx64, cpu64.gs) << "\n"; +} + +static void Print_mmst_reg(MachO::mmst_reg_t &r) { + uint32_t f; + outs() << "\t mmst_reg "; + for (f = 0; f < 10; f++) + outs() << format("%02" PRIx32, (r.mmst_reg[f] & 0xff)) << " "; + outs() << "\n"; + outs() << "\t mmst_rsrv "; + for (f = 0; f < 6; f++) + outs() << format("%02" PRIx32, (r.mmst_rsrv[f] & 0xff)) << " "; + outs() << "\n"; +} + +static void Print_xmm_reg(MachO::xmm_reg_t &r) { + uint32_t f; + outs() << "\t xmm_reg "; + for (f = 0; f < 16; f++) + outs() << format("%02" PRIx32, (r.xmm_reg[f] & 0xff)) << " "; + outs() << "\n"; +} + +static void Print_x86_float_state_t(MachO::x86_float_state64_t &fpu) { + outs() << "\t fpu_reserved[0] " << fpu.fpu_reserved[0]; + outs() << " fpu_reserved[1] " << fpu.fpu_reserved[1] << "\n"; + outs() << "\t control: invalid " << fpu.fpu_fcw.invalid; + outs() << " denorm " << fpu.fpu_fcw.denorm; + outs() << " zdiv " << fpu.fpu_fcw.zdiv; + outs() << " ovrfl " << fpu.fpu_fcw.ovrfl; + outs() << " undfl " << fpu.fpu_fcw.undfl; + outs() << " precis " << fpu.fpu_fcw.precis << "\n"; + outs() << "\t\t pc "; + if (fpu.fpu_fcw.pc == MachO::x86_FP_PREC_24B) + outs() << "FP_PREC_24B "; + else if (fpu.fpu_fcw.pc == MachO::x86_FP_PREC_53B) + outs() << "FP_PREC_53B "; + else if (fpu.fpu_fcw.pc == MachO::x86_FP_PREC_64B) + outs() << "FP_PREC_64B "; else + outs() << fpu.fpu_fcw.pc << " "; + outs() << "rc "; + if (fpu.fpu_fcw.rc == MachO::x86_FP_RND_NEAR) + outs() << "FP_RND_NEAR "; + else if (fpu.fpu_fcw.rc == MachO::x86_FP_RND_DOWN) + outs() << "FP_RND_DOWN "; + else if (fpu.fpu_fcw.rc == MachO::x86_FP_RND_UP) + outs() << "FP_RND_UP "; + else if (fpu.fpu_fcw.rc == MachO::x86_FP_CHOP) + outs() << "FP_CHOP "; + outs() << "\n"; + outs() << "\t status: invalid " << fpu.fpu_fsw.invalid; + outs() << " denorm " << fpu.fpu_fsw.denorm; + outs() << " zdiv " << fpu.fpu_fsw.zdiv; + outs() << " ovrfl " << fpu.fpu_fsw.ovrfl; + outs() << " undfl " << fpu.fpu_fsw.undfl; + outs() << " precis " << fpu.fpu_fsw.precis; + outs() << " stkflt " << fpu.fpu_fsw.stkflt << "\n"; + outs() << "\t errsumm " << fpu.fpu_fsw.errsumm; + outs() << " c0 " << fpu.fpu_fsw.c0; + outs() << " c1 " << fpu.fpu_fsw.c1; + outs() << " c2 " << fpu.fpu_fsw.c2; + outs() << " tos " << fpu.fpu_fsw.tos; + outs() << " c3 " << fpu.fpu_fsw.c3; + outs() << " busy " << fpu.fpu_fsw.busy << "\n"; + outs() << "\t fpu_ftw " << format("0x%02" PRIx32, fpu.fpu_ftw); + outs() << " fpu_rsrv1 " << format("0x%02" PRIx32, fpu.fpu_rsrv1); + outs() << " fpu_fop " << format("0x%04" PRIx32, fpu.fpu_fop); + outs() << " fpu_ip " << format("0x%08" PRIx32, fpu.fpu_ip) << "\n"; + outs() << "\t fpu_cs " << format("0x%04" PRIx32, fpu.fpu_cs); + outs() << " fpu_rsrv2 " << format("0x%04" PRIx32, fpu.fpu_rsrv2); + outs() << " fpu_dp " << format("0x%08" PRIx32, fpu.fpu_dp); + outs() << " fpu_ds " << format("0x%04" PRIx32, fpu.fpu_ds) << "\n"; + outs() << "\t fpu_rsrv3 " << format("0x%04" PRIx32, fpu.fpu_rsrv3); + outs() << " fpu_mxcsr " << format("0x%08" PRIx32, fpu.fpu_mxcsr); + outs() << " fpu_mxcsrmask " << format("0x%08" PRIx32, fpu.fpu_mxcsrmask); + outs() << "\n"; + outs() << "\t fpu_stmm0:\n"; + Print_mmst_reg(fpu.fpu_stmm0); + outs() << "\t fpu_stmm1:\n"; + Print_mmst_reg(fpu.fpu_stmm1); + outs() << "\t fpu_stmm2:\n"; + Print_mmst_reg(fpu.fpu_stmm2); + outs() << "\t fpu_stmm3:\n"; + Print_mmst_reg(fpu.fpu_stmm3); + outs() << "\t fpu_stmm4:\n"; + Print_mmst_reg(fpu.fpu_stmm4); + outs() << "\t fpu_stmm5:\n"; + Print_mmst_reg(fpu.fpu_stmm5); + outs() << "\t fpu_stmm6:\n"; + Print_mmst_reg(fpu.fpu_stmm6); + outs() << "\t fpu_stmm7:\n"; + Print_mmst_reg(fpu.fpu_stmm7); + outs() << "\t fpu_xmm0:\n"; + Print_xmm_reg(fpu.fpu_xmm0); + outs() << "\t fpu_xmm1:\n"; + Print_xmm_reg(fpu.fpu_xmm1); + outs() << "\t fpu_xmm2:\n"; + Print_xmm_reg(fpu.fpu_xmm2); + outs() << "\t fpu_xmm3:\n"; + Print_xmm_reg(fpu.fpu_xmm3); + outs() << "\t fpu_xmm4:\n"; + Print_xmm_reg(fpu.fpu_xmm4); + outs() << "\t fpu_xmm5:\n"; + Print_xmm_reg(fpu.fpu_xmm5); + outs() << "\t fpu_xmm6:\n"; + Print_xmm_reg(fpu.fpu_xmm6); + outs() << "\t fpu_xmm7:\n"; + Print_xmm_reg(fpu.fpu_xmm7); + outs() << "\t fpu_xmm8:\n"; + Print_xmm_reg(fpu.fpu_xmm8); + outs() << "\t fpu_xmm9:\n"; + Print_xmm_reg(fpu.fpu_xmm9); + outs() << "\t fpu_xmm10:\n"; + Print_xmm_reg(fpu.fpu_xmm10); + outs() << "\t fpu_xmm11:\n"; + Print_xmm_reg(fpu.fpu_xmm11); + outs() << "\t fpu_xmm12:\n"; + Print_xmm_reg(fpu.fpu_xmm12); + outs() << "\t fpu_xmm13:\n"; + Print_xmm_reg(fpu.fpu_xmm13); + outs() << "\t fpu_xmm14:\n"; + Print_xmm_reg(fpu.fpu_xmm14); + outs() << "\t fpu_xmm15:\n"; + Print_xmm_reg(fpu.fpu_xmm15); + outs() << "\t fpu_rsrv4:\n"; + for (uint32_t f = 0; f < 6; f++) { + outs() << "\t "; + for (uint32_t g = 0; g < 16; g++) + outs() << format("%02" PRIx32, fpu.fpu_rsrv4[f * g]) << " "; outs() << "\n"; - outs() << " nindirectsyms " << dyst.nindirectsyms; - big_size = dyst.nindirectsyms; - big_size *= sizeof(uint32_t); - big_size += dyst.indirectsymoff; - if (big_size > object_size) - outs() << " (past end of file)\n"; + } + outs() << "\t fpu_reserved1 " << format("0x%08" PRIx32, fpu.fpu_reserved1); + outs() << "\n"; +} + +static void Print_x86_exception_state_t(MachO::x86_exception_state64_t &exc64) { + outs() << "\t trapno " << format("0x%08" PRIx32, exc64.trapno); + outs() << " err " << format("0x%08" PRIx32, exc64.err); + outs() << " faultvaddr " << format("0x%016" PRIx64, exc64.faultvaddr) << "\n"; +} + +static void PrintThreadCommand(MachO::thread_command t, const char *Ptr, + bool isLittleEndian, uint32_t cputype) { + if (t.cmd == MachO::LC_THREAD) + outs() << " cmd LC_THREAD\n"; + else if (t.cmd == MachO::LC_UNIXTHREAD) + outs() << " cmd LC_UNIXTHREAD\n"; + else + outs() << " cmd " << t.cmd << " (unknown)\n"; + outs() << " cmdsize " << t.cmdsize; + if (t.cmdsize < sizeof(struct MachO::thread_command) + 2 * sizeof(uint32_t)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " extreloff " << dyst.extreloff; - if (dyst.extreloff > object_size) - outs() << " (past end of file)\n"; + + const char *begin = Ptr + sizeof(struct MachO::thread_command); + const char *end = Ptr + t.cmdsize; + uint32_t flavor, count, left; + if (cputype == MachO::CPU_TYPE_X86_64) { + while (begin < end) { + if (end - begin > (ptrdiff_t)sizeof(uint32_t)) { + memcpy((char *)&flavor, begin, sizeof(uint32_t)); + begin += sizeof(uint32_t); + } else { + flavor = 0; + begin = end; + } + if (isLittleEndian != sys::IsLittleEndianHost) + sys::swapByteOrder(flavor); + if (end - begin > (ptrdiff_t)sizeof(uint32_t)) { + memcpy((char *)&count, begin, sizeof(uint32_t)); + begin += sizeof(uint32_t); + } else { + count = 0; + begin = end; + } + if (isLittleEndian != sys::IsLittleEndianHost) + sys::swapByteOrder(count); + if (flavor == MachO::x86_THREAD_STATE64) { + outs() << " flavor x86_THREAD_STATE64\n"; + if (count == MachO::x86_THREAD_STATE64_COUNT) + outs() << " count x86_THREAD_STATE64_COUNT\n"; + else + outs() << " count " << count + << " (not x86_THREAD_STATE64_COUNT)\n"; + MachO::x86_thread_state64_t cpu64; + left = end - begin; + if (left >= sizeof(MachO::x86_thread_state64_t)) { + memcpy(&cpu64, begin, sizeof(MachO::x86_thread_state64_t)); + begin += sizeof(MachO::x86_thread_state64_t); + } else { + memset(&cpu64, '\0', sizeof(MachO::x86_thread_state64_t)); + memcpy(&cpu64, begin, left); + begin += left; + } + if (isLittleEndian != sys::IsLittleEndianHost) + swapStruct(cpu64); + Print_x86_thread_state64_t(cpu64); + } else if (flavor == MachO::x86_THREAD_STATE) { + outs() << " flavor x86_THREAD_STATE\n"; + if (count == MachO::x86_THREAD_STATE_COUNT) + outs() << " count x86_THREAD_STATE_COUNT\n"; + else + outs() << " count " << count + << " (not x86_THREAD_STATE_COUNT)\n"; + struct MachO::x86_thread_state_t ts; + left = end - begin; + if (left >= sizeof(MachO::x86_thread_state_t)) { + memcpy(&ts, begin, sizeof(MachO::x86_thread_state_t)); + begin += sizeof(MachO::x86_thread_state_t); + } else { + memset(&ts, '\0', sizeof(MachO::x86_thread_state_t)); + memcpy(&ts, begin, left); + begin += left; + } + if (isLittleEndian != sys::IsLittleEndianHost) + swapStruct(ts); + if (ts.tsh.flavor == MachO::x86_THREAD_STATE64) { + outs() << "\t tsh.flavor x86_THREAD_STATE64 "; + if (ts.tsh.count == MachO::x86_THREAD_STATE64_COUNT) + outs() << "tsh.count x86_THREAD_STATE64_COUNT\n"; + else + outs() << "tsh.count " << ts.tsh.count + << " (not x86_THREAD_STATE64_COUNT\n"; + Print_x86_thread_state64_t(ts.uts.ts64); + } else { + outs() << "\t tsh.flavor " << ts.tsh.flavor << " tsh.count " + << ts.tsh.count << "\n"; + } + } else if (flavor == MachO::x86_FLOAT_STATE) { + outs() << " flavor x86_FLOAT_STATE\n"; + if (count == MachO::x86_FLOAT_STATE_COUNT) + outs() << " count x86_FLOAT_STATE_COUNT\n"; + else + outs() << " count " << count << " (not x86_FLOAT_STATE_COUNT)\n"; + struct MachO::x86_float_state_t fs; + left = end - begin; + if (left >= sizeof(MachO::x86_float_state_t)) { + memcpy(&fs, begin, sizeof(MachO::x86_float_state_t)); + begin += sizeof(MachO::x86_float_state_t); + } else { + memset(&fs, '\0', sizeof(MachO::x86_float_state_t)); + memcpy(&fs, begin, left); + begin += left; + } + if (isLittleEndian != sys::IsLittleEndianHost) + swapStruct(fs); + if (fs.fsh.flavor == MachO::x86_FLOAT_STATE64) { + outs() << "\t fsh.flavor x86_FLOAT_STATE64 "; + if (fs.fsh.count == MachO::x86_FLOAT_STATE64_COUNT) + outs() << "fsh.count x86_FLOAT_STATE64_COUNT\n"; + else + outs() << "fsh.count " << fs.fsh.count + << " (not x86_FLOAT_STATE64_COUNT\n"; + Print_x86_float_state_t(fs.ufs.fs64); + } else { + outs() << "\t fsh.flavor " << fs.fsh.flavor << " fsh.count " + << fs.fsh.count << "\n"; + } + } else if (flavor == MachO::x86_EXCEPTION_STATE) { + outs() << " flavor x86_EXCEPTION_STATE\n"; + if (count == MachO::x86_EXCEPTION_STATE_COUNT) + outs() << " count x86_EXCEPTION_STATE_COUNT\n"; + else + outs() << " count " << count + << " (not x86_EXCEPTION_STATE_COUNT)\n"; + struct MachO::x86_exception_state_t es; + left = end - begin; + if (left >= sizeof(MachO::x86_exception_state_t)) { + memcpy(&es, begin, sizeof(MachO::x86_exception_state_t)); + begin += sizeof(MachO::x86_exception_state_t); + } else { + memset(&es, '\0', sizeof(MachO::x86_exception_state_t)); + memcpy(&es, begin, left); + begin += left; + } + if (isLittleEndian != sys::IsLittleEndianHost) + swapStruct(es); + if (es.esh.flavor == MachO::x86_EXCEPTION_STATE64) { + outs() << "\t esh.flavor x86_EXCEPTION_STATE64\n"; + if (es.esh.count == MachO::x86_EXCEPTION_STATE64_COUNT) + outs() << "\t esh.count x86_EXCEPTION_STATE64_COUNT\n"; + else + outs() << "\t esh.count " << es.esh.count + << " (not x86_EXCEPTION_STATE64_COUNT\n"; + Print_x86_exception_state_t(es.ues.es64); + } else { + outs() << "\t esh.flavor " << es.esh.flavor << " esh.count " + << es.esh.count << "\n"; + } + } else { + outs() << " flavor " << flavor << " (unknown)\n"; + outs() << " count " << count << "\n"; + outs() << " state (unknown)\n"; + begin += count * sizeof(uint32_t); + } + } + } else { + while (begin < end) { + if (end - begin > (ptrdiff_t)sizeof(uint32_t)) { + memcpy((char *)&flavor, begin, sizeof(uint32_t)); + begin += sizeof(uint32_t); + } else { + flavor = 0; + begin = end; + } + if (isLittleEndian != sys::IsLittleEndianHost) + sys::swapByteOrder(flavor); + if (end - begin > (ptrdiff_t)sizeof(uint32_t)) { + memcpy((char *)&count, begin, sizeof(uint32_t)); + begin += sizeof(uint32_t); + } else { + count = 0; + begin = end; + } + if (isLittleEndian != sys::IsLittleEndianHost) + sys::swapByteOrder(count); + outs() << " flavor " << flavor << "\n"; + outs() << " count " << count << "\n"; + outs() << " state (Unknown cputype/cpusubtype)\n"; + begin += count * sizeof(uint32_t); + } + } +} + +static void PrintDylibCommand(MachO::dylib_command dl, const char *Ptr) { + if (dl.cmd == MachO::LC_ID_DYLIB) + outs() << " cmd LC_ID_DYLIB\n"; + else if (dl.cmd == MachO::LC_LOAD_DYLIB) + outs() << " cmd LC_LOAD_DYLIB\n"; + else if (dl.cmd == MachO::LC_LOAD_WEAK_DYLIB) + outs() << " cmd LC_LOAD_WEAK_DYLIB\n"; + else if (dl.cmd == MachO::LC_REEXPORT_DYLIB) + outs() << " cmd LC_REEXPORT_DYLIB\n"; + else if (dl.cmd == MachO::LC_LAZY_LOAD_DYLIB) + outs() << " cmd LC_LAZY_LOAD_DYLIB\n"; + else if (dl.cmd == MachO::LC_LOAD_UPWARD_DYLIB) + outs() << " cmd LC_LOAD_UPWARD_DYLIB\n"; + else + outs() << " cmd " << dl.cmd << " (unknown)\n"; + outs() << " cmdsize " << dl.cmdsize; + if (dl.cmdsize < sizeof(struct MachO::dylib_command)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " nextrel " << dyst.nextrel; - big_size = dyst.nextrel; - big_size *= sizeof(struct MachO::relocation_info); - big_size += dyst.extreloff; - if (big_size > object_size) - outs() << " (past end of file)\n"; + if (dl.dylib.name < dl.cmdsize) { + const char *P = (const char *)(Ptr) + dl.dylib.name; + outs() << " name " << P << " (offset " << dl.dylib.name << ")\n"; + } else { + outs() << " name ?(bad offset " << dl.dylib.name << ")\n"; + } + outs() << " time stamp " << dl.dylib.timestamp << " "; + time_t t = dl.dylib.timestamp; + outs() << ctime(&t); + outs() << " current version "; + if (dl.dylib.current_version == 0xffffffff) + outs() << "n/a\n"; + else + outs() << ((dl.dylib.current_version >> 16) & 0xffff) << "." + << ((dl.dylib.current_version >> 8) & 0xff) << "." + << (dl.dylib.current_version & 0xff) << "\n"; + outs() << "compatibility version "; + if (dl.dylib.compatibility_version == 0xffffffff) + outs() << "n/a\n"; + else + outs() << ((dl.dylib.compatibility_version >> 16) & 0xffff) << "." + << ((dl.dylib.compatibility_version >> 8) & 0xff) << "." + << (dl.dylib.compatibility_version & 0xff) << "\n"; +} + +static void PrintLinkEditDataCommand(MachO::linkedit_data_command ld, + uint32_t object_size) { + if (ld.cmd == MachO::LC_CODE_SIGNATURE) + outs() << " cmd LC_FUNCTION_STARTS\n"; + else if (ld.cmd == MachO::LC_SEGMENT_SPLIT_INFO) + outs() << " cmd LC_SEGMENT_SPLIT_INFO\n"; + else if (ld.cmd == MachO::LC_FUNCTION_STARTS) + outs() << " cmd LC_FUNCTION_STARTS\n"; + else if (ld.cmd == MachO::LC_DATA_IN_CODE) + outs() << " cmd LC_DATA_IN_CODE\n"; + else if (ld.cmd == MachO::LC_DYLIB_CODE_SIGN_DRS) + outs() << " cmd LC_DYLIB_CODE_SIGN_DRS\n"; + else if (ld.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT) + outs() << " cmd LC_LINKER_OPTIMIZATION_HINT\n"; + else + outs() << " cmd " << ld.cmd << " (?)\n"; + outs() << " cmdsize " << ld.cmdsize; + if (ld.cmdsize != sizeof(struct MachO::linkedit_data_command)) + outs() << " Incorrect size\n"; else outs() << "\n"; - outs() << " locreloff " << dyst.locreloff; - if (dyst.locreloff > object_size) + outs() << " dataoff " << ld.dataoff; + if (ld.dataoff > object_size) outs() << " (past end of file)\n"; else outs() << "\n"; - outs() << " nlocrel " << dyst.nlocrel; - big_size = dyst.nlocrel; - big_size *= sizeof(struct MachO::relocation_info); - big_size += dyst.locreloff; + outs() << " datasize " << ld.datasize; + uint64_t big_size = ld.dataoff; + big_size += ld.datasize; if (big_size > object_size) outs() << " (past end of file)\n"; else @@ -1699,6 +4959,8 @@ static void PrintDysymtabLoadCommand(MachO::dysymtab_command dyst, static void PrintLoadCommands(const MachOObjectFile *Obj, uint32_t ncmds, uint32_t filetype, uint32_t cputype, bool verbose) { + if (ncmds == 0) + return; StringRef Buf = Obj->getData(); MachOObjectFile::LoadCommandInfo Command = Obj->getFirstLoadCommandInfo(); for (unsigned i = 0;; ++i) { @@ -1711,7 +4973,7 @@ static void PrintLoadCommands(const MachOObjectFile *Obj, uint32_t ncmds, SLC.initprot, SLC.nsects, SLC.flags, Buf.size(), verbose); for (unsigned j = 0; j < SLC.nsects; j++) { - MachO::section_64 S = Obj->getSection64(Command, j); + MachO::section S = Obj->getSection(Command, j); PrintSection(S.sectname, S.segname, S.addr, S.size, S.offset, S.align, S.reloff, S.nreloc, S.flags, S.reserved1, S.reserved2, SLC.cmd, sg_segname, filetype, Buf.size(), verbose); @@ -1732,11 +4994,88 @@ static void PrintLoadCommands(const MachOObjectFile *Obj, uint32_t ncmds, } } else if (Command.C.cmd == MachO::LC_SYMTAB) { MachO::symtab_command Symtab = Obj->getSymtabLoadCommand(); - PrintSymtabLoadCommand(Symtab, cputype, Buf.size()); + PrintSymtabLoadCommand(Symtab, Obj->is64Bit(), Buf.size()); } else if (Command.C.cmd == MachO::LC_DYSYMTAB) { MachO::dysymtab_command Dysymtab = Obj->getDysymtabLoadCommand(); MachO::symtab_command Symtab = Obj->getSymtabLoadCommand(); - PrintDysymtabLoadCommand(Dysymtab, Symtab.nsyms, Buf.size(), cputype); + PrintDysymtabLoadCommand(Dysymtab, Symtab.nsyms, Buf.size(), + Obj->is64Bit()); + } else if (Command.C.cmd == MachO::LC_DYLD_INFO || + Command.C.cmd == MachO::LC_DYLD_INFO_ONLY) { + MachO::dyld_info_command DyldInfo = Obj->getDyldInfoLoadCommand(Command); + PrintDyldInfoLoadCommand(DyldInfo, Buf.size()); + } else if (Command.C.cmd == MachO::LC_LOAD_DYLINKER || + Command.C.cmd == MachO::LC_ID_DYLINKER || + Command.C.cmd == MachO::LC_DYLD_ENVIRONMENT) { + MachO::dylinker_command Dyld = Obj->getDylinkerCommand(Command); + PrintDyldLoadCommand(Dyld, Command.Ptr); + } else if (Command.C.cmd == MachO::LC_UUID) { + MachO::uuid_command Uuid = Obj->getUuidCommand(Command); + PrintUuidLoadCommand(Uuid); + } else if (Command.C.cmd == MachO::LC_RPATH) { + MachO::rpath_command Rpath = Obj->getRpathCommand(Command); + PrintRpathLoadCommand(Rpath, Command.Ptr); + } else if (Command.C.cmd == MachO::LC_VERSION_MIN_MACOSX || + Command.C.cmd == MachO::LC_VERSION_MIN_IPHONEOS) { + MachO::version_min_command Vd = Obj->getVersionMinLoadCommand(Command); + PrintVersionMinLoadCommand(Vd); + } else if (Command.C.cmd == MachO::LC_SOURCE_VERSION) { + MachO::source_version_command Sd = Obj->getSourceVersionCommand(Command); + PrintSourceVersionCommand(Sd); + } else if (Command.C.cmd == MachO::LC_MAIN) { + MachO::entry_point_command Ep = Obj->getEntryPointCommand(Command); + PrintEntryPointCommand(Ep); + } else if (Command.C.cmd == MachO::LC_ENCRYPTION_INFO) { + MachO::encryption_info_command Ei = + Obj->getEncryptionInfoCommand(Command); + PrintEncryptionInfoCommand(Ei, Buf.size()); + } else if (Command.C.cmd == MachO::LC_ENCRYPTION_INFO_64) { + MachO::encryption_info_command_64 Ei = + Obj->getEncryptionInfoCommand64(Command); + PrintEncryptionInfoCommand64(Ei, Buf.size()); + } else if (Command.C.cmd == MachO::LC_LINKER_OPTION) { + MachO::linker_option_command Lo = + Obj->getLinkerOptionLoadCommand(Command); + PrintLinkerOptionCommand(Lo, Command.Ptr); + } else if (Command.C.cmd == MachO::LC_SUB_FRAMEWORK) { + MachO::sub_framework_command Sf = Obj->getSubFrameworkCommand(Command); + PrintSubFrameworkCommand(Sf, Command.Ptr); + } else if (Command.C.cmd == MachO::LC_SUB_UMBRELLA) { + MachO::sub_umbrella_command Sf = Obj->getSubUmbrellaCommand(Command); + PrintSubUmbrellaCommand(Sf, Command.Ptr); + } else if (Command.C.cmd == MachO::LC_SUB_LIBRARY) { + MachO::sub_library_command Sl = Obj->getSubLibraryCommand(Command); + PrintSubLibraryCommand(Sl, Command.Ptr); + } else if (Command.C.cmd == MachO::LC_SUB_CLIENT) { + MachO::sub_client_command Sc = Obj->getSubClientCommand(Command); + PrintSubClientCommand(Sc, Command.Ptr); + } else if (Command.C.cmd == MachO::LC_ROUTINES) { + MachO::routines_command Rc = Obj->getRoutinesCommand(Command); + PrintRoutinesCommand(Rc); + } else if (Command.C.cmd == MachO::LC_ROUTINES_64) { + MachO::routines_command_64 Rc = Obj->getRoutinesCommand64(Command); + PrintRoutinesCommand64(Rc); + } else if (Command.C.cmd == MachO::LC_THREAD || + Command.C.cmd == MachO::LC_UNIXTHREAD) { + MachO::thread_command Tc = Obj->getThreadCommand(Command); + PrintThreadCommand(Tc, Command.Ptr, Obj->isLittleEndian(), cputype); + } else if (Command.C.cmd == MachO::LC_LOAD_DYLIB || + Command.C.cmd == MachO::LC_ID_DYLIB || + Command.C.cmd == MachO::LC_LOAD_WEAK_DYLIB || + Command.C.cmd == MachO::LC_REEXPORT_DYLIB || + Command.C.cmd == MachO::LC_LAZY_LOAD_DYLIB || + Command.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) { + MachO::dylib_command Dl = Obj->getDylibIDLoadCommand(Command); + PrintDylibCommand(Dl, Command.Ptr); + } else if (Command.C.cmd == MachO::LC_CODE_SIGNATURE || + Command.C.cmd == MachO::LC_SEGMENT_SPLIT_INFO || + Command.C.cmd == MachO::LC_FUNCTION_STARTS || + Command.C.cmd == MachO::LC_DATA_IN_CODE || + Command.C.cmd == MachO::LC_DYLIB_CODE_SIGN_DRS || + Command.C.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT) { + MachO::linkedit_data_command Ld = + Obj->getLinkeditDataLoadCommand(Command); + PrintLinkEditDataCommand(Ld, Buf.size()); } else { outs() << " cmd ?(" << format("0x%08" PRIx32, Command.C.cmd) << ")\n"; @@ -1799,8 +5138,8 @@ void llvm::printMachOExportsTrie(const object::MachOObjectFile *Obj) { if (ReExport) outs() << "[re-export] "; else - outs() - << format("0x%08llX ", Entry.address()); // FIXME:add in base address + outs() << format("0x%08llX ", + Entry.address()); // FIXME:add in base address outs() << Entry.name(); if (WeakDef || ThreadLocal || Resolver || Abs) { bool NeedsComma = false; @@ -1841,3 +5180,252 @@ void llvm::printMachOExportsTrie(const object::MachOObjectFile *Obj) { outs() << "\n"; } } + +//===----------------------------------------------------------------------===// +// rebase table dumping +//===----------------------------------------------------------------------===// + +namespace { +class SegInfo { +public: + SegInfo(const object::MachOObjectFile *Obj); + + StringRef segmentName(uint32_t SegIndex); + StringRef sectionName(uint32_t SegIndex, uint64_t SegOffset); + uint64_t address(uint32_t SegIndex, uint64_t SegOffset); + +private: + struct SectionInfo { + uint64_t Address; + uint64_t Size; + StringRef SectionName; + StringRef SegmentName; + uint64_t OffsetInSegment; + uint64_t SegmentStartAddress; + uint32_t SegmentIndex; + }; + const SectionInfo &findSection(uint32_t SegIndex, uint64_t SegOffset); + SmallVector Sections; +}; +} + +SegInfo::SegInfo(const object::MachOObjectFile *Obj) { + // Build table of sections so segIndex/offset pairs can be translated. + uint32_t CurSegIndex = Obj->hasPageZeroSegment() ? 1 : 0; + StringRef CurSegName; + uint64_t CurSegAddress; + for (const SectionRef &Section : Obj->sections()) { + SectionInfo Info; + if (error(Section.getName(Info.SectionName))) + return; + Info.Address = Section.getAddress(); + Info.Size = Section.getSize(); + Info.SegmentName = + Obj->getSectionFinalSegmentName(Section.getRawDataRefImpl()); + if (!Info.SegmentName.equals(CurSegName)) { + ++CurSegIndex; + CurSegName = Info.SegmentName; + CurSegAddress = Info.Address; + } + Info.SegmentIndex = CurSegIndex - 1; + Info.OffsetInSegment = Info.Address - CurSegAddress; + Info.SegmentStartAddress = CurSegAddress; + Sections.push_back(Info); + } +} + +StringRef SegInfo::segmentName(uint32_t SegIndex) { + for (const SectionInfo &SI : Sections) { + if (SI.SegmentIndex == SegIndex) + return SI.SegmentName; + } + llvm_unreachable("invalid segIndex"); +} + +const SegInfo::SectionInfo &SegInfo::findSection(uint32_t SegIndex, + uint64_t OffsetInSeg) { + for (const SectionInfo &SI : Sections) { + if (SI.SegmentIndex != SegIndex) + continue; + if (SI.OffsetInSegment > OffsetInSeg) + continue; + if (OffsetInSeg >= (SI.OffsetInSegment + SI.Size)) + continue; + return SI; + } + llvm_unreachable("segIndex and offset not in any section"); +} + +StringRef SegInfo::sectionName(uint32_t SegIndex, uint64_t OffsetInSeg) { + return findSection(SegIndex, OffsetInSeg).SectionName; +} + +uint64_t SegInfo::address(uint32_t SegIndex, uint64_t OffsetInSeg) { + const SectionInfo &SI = findSection(SegIndex, OffsetInSeg); + return SI.SegmentStartAddress + OffsetInSeg; +} + +void llvm::printMachORebaseTable(const object::MachOObjectFile *Obj) { + // Build table of sections so names can used in final output. + SegInfo sectionTable(Obj); + + outs() << "segment section address type\n"; + for (const llvm::object::MachORebaseEntry &Entry : Obj->rebaseTable()) { + uint32_t SegIndex = Entry.segmentIndex(); + uint64_t OffsetInSeg = Entry.segmentOffset(); + StringRef SegmentName = sectionTable.segmentName(SegIndex); + StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg); + uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); + + // Table lines look like: __DATA __nl_symbol_ptr 0x0000F00C pointer + outs() << format("%-8s %-18s 0x%08" PRIX64 " %s\n", + SegmentName.str().c_str(), SectionName.str().c_str(), + Address, Entry.typeName().str().c_str()); + } +} + +static StringRef ordinalName(const object::MachOObjectFile *Obj, int Ordinal) { + StringRef DylibName; + switch (Ordinal) { + case MachO::BIND_SPECIAL_DYLIB_SELF: + return "this-image"; + case MachO::BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE: + return "main-executable"; + case MachO::BIND_SPECIAL_DYLIB_FLAT_LOOKUP: + return "flat-namespace"; + default: + if (Ordinal > 0) { + std::error_code EC = + Obj->getLibraryShortNameByIndex(Ordinal - 1, DylibName); + if (EC) + return "<>"; + return DylibName; + } + } + return "<>"; +} + +//===----------------------------------------------------------------------===// +// bind table dumping +//===----------------------------------------------------------------------===// + +void llvm::printMachOBindTable(const object::MachOObjectFile *Obj) { + // Build table of sections so names can used in final output. + SegInfo sectionTable(Obj); + + outs() << "segment section address type " + "addend dylib symbol\n"; + for (const llvm::object::MachOBindEntry &Entry : Obj->bindTable()) { + uint32_t SegIndex = Entry.segmentIndex(); + uint64_t OffsetInSeg = Entry.segmentOffset(); + StringRef SegmentName = sectionTable.segmentName(SegIndex); + StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg); + uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); + + // Table lines look like: + // __DATA __got 0x00012010 pointer 0 libSystem ___stack_chk_guard + StringRef Attr; + if (Entry.flags() & MachO::BIND_SYMBOL_FLAGS_WEAK_IMPORT) + Attr = " (weak_import)"; + outs() << left_justify(SegmentName, 8) << " " + << left_justify(SectionName, 18) << " " + << format_hex(Address, 10, true) << " " + << left_justify(Entry.typeName(), 8) << " " + << format_decimal(Entry.addend(), 8) << " " + << left_justify(ordinalName(Obj, Entry.ordinal()), 16) << " " + << Entry.symbolName() << Attr << "\n"; + } +} + +//===----------------------------------------------------------------------===// +// lazy bind table dumping +//===----------------------------------------------------------------------===// + +void llvm::printMachOLazyBindTable(const object::MachOObjectFile *Obj) { + // Build table of sections so names can used in final output. + SegInfo sectionTable(Obj); + + outs() << "segment section address " + "dylib symbol\n"; + for (const llvm::object::MachOBindEntry &Entry : Obj->lazyBindTable()) { + uint32_t SegIndex = Entry.segmentIndex(); + uint64_t OffsetInSeg = Entry.segmentOffset(); + StringRef SegmentName = sectionTable.segmentName(SegIndex); + StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg); + uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); + + // Table lines look like: + // __DATA __got 0x00012010 libSystem ___stack_chk_guard + outs() << left_justify(SegmentName, 8) << " " + << left_justify(SectionName, 18) << " " + << format_hex(Address, 10, true) << " " + << left_justify(ordinalName(Obj, Entry.ordinal()), 16) << " " + << Entry.symbolName() << "\n"; + } +} + +//===----------------------------------------------------------------------===// +// weak bind table dumping +//===----------------------------------------------------------------------===// + +void llvm::printMachOWeakBindTable(const object::MachOObjectFile *Obj) { + // Build table of sections so names can used in final output. + SegInfo sectionTable(Obj); + + outs() << "segment section address " + "type addend symbol\n"; + for (const llvm::object::MachOBindEntry &Entry : Obj->weakBindTable()) { + // Strong symbols don't have a location to update. + if (Entry.flags() & MachO::BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION) { + outs() << " strong " + << Entry.symbolName() << "\n"; + continue; + } + uint32_t SegIndex = Entry.segmentIndex(); + uint64_t OffsetInSeg = Entry.segmentOffset(); + StringRef SegmentName = sectionTable.segmentName(SegIndex); + StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg); + uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); + + // Table lines look like: + // __DATA __data 0x00001000 pointer 0 _foo + outs() << left_justify(SegmentName, 8) << " " + << left_justify(SectionName, 18) << " " + << format_hex(Address, 10, true) << " " + << left_justify(Entry.typeName(), 8) << " " + << format_decimal(Entry.addend(), 8) << " " << Entry.symbolName() + << "\n"; + } +} + +// get_dyld_bind_info_symbolname() is used for disassembly and passed an +// address, ReferenceValue, in the Mach-O file and looks in the dyld bind +// information for that address. If the address is found its binding symbol +// name is returned. If not nullptr is returned. +static const char *get_dyld_bind_info_symbolname(uint64_t ReferenceValue, + struct DisassembleInfo *info) { + if (info->bindtable == nullptr) { + info->bindtable = new (BindTable); + SegInfo sectionTable(info->O); + for (const llvm::object::MachOBindEntry &Entry : info->O->bindTable()) { + uint32_t SegIndex = Entry.segmentIndex(); + uint64_t OffsetInSeg = Entry.segmentOffset(); + uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); + const char *SymbolName = nullptr; + StringRef name = Entry.symbolName(); + if (!name.empty()) + SymbolName = name.data(); + info->bindtable->push_back(std::make_pair(Address, SymbolName)); + } + } + for (bind_table_iterator BI = info->bindtable->begin(), + BE = info->bindtable->end(); + BI != BE; ++BI) { + uint64_t Address = BI->first; + if (ReferenceValue == Address) { + const char *SymbolName = BI->second; + return SymbolName; + } + } + return nullptr; +}