tools/llvm-readobj/MachODumper.cpp

   1 //===-- MachODump.cpp - Object file dumping utility for llvm --------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements the MachO-specific dumper for llvm-readobj.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm-readobj.h"
  15 #include "Error.h"
  16 #include "ObjDumper.h"
  17 #include "StackMapPrinter.h"
  18 #include "StreamWriter.h"
  19 #include "llvm/ADT/SmallString.h"
  20 #include "llvm/ADT/StringExtras.h"
  21 #include "llvm/Object/MachO.h"
  22 #include "llvm/Support/Casting.h"
  23
  24 using namespace llvm;
  25 using namespace object;
  26
  27 namespace {
  28
  29 class MachODumper : public ObjDumper {
  30 public:
  31   MachODumper(const MachOObjectFile *Obj, StreamWriter& Writer)
  32     : ObjDumper(Writer)
  33     , Obj(Obj) { }
  34
  35   void printFileHeaders() override;
  36   void printSections() override;
  37   void printRelocations() override;
  38   void printSymbols() override;
  39   void printDynamicSymbols() override;
  40   void printUnwindInfo() override;
  41   void printStackMap() const override;
  42
  43 private:
  44   template<class MachHeader>
  45   void printFileHeaders(const MachHeader &Header);
  46
  47   void printSymbol(const SymbolRef &Symbol);
  48
  49   void printRelocation(const RelocationRef &Reloc);
  50
  51   void printRelocation(const MachOObjectFile *Obj, const RelocationRef &Reloc);
  52
  53   void printSections(const MachOObjectFile *Obj);
  54
  55   const MachOObjectFile *Obj;
  56 };
  57
  58 } // namespace
  59
  60
  61 namespace llvm {
  62
  63 std::error_code createMachODumper(const object::ObjectFile *Obj,
  64                                   StreamWriter &Writer,
  65                                   std::unique_ptr<ObjDumper> &Result) {
  66   const MachOObjectFile *MachOObj = dyn_cast<MachOObjectFile>(Obj);
  67   if (!MachOObj)
  68     return readobj_error::unsupported_obj_file_format;
  69
  70   Result.reset(new MachODumper(MachOObj, Writer));
  71   return readobj_error::success;
  72 }
  73
  74 } // namespace llvm
  75
  76 static const EnumEntry<uint32_t> MachOMagics[] = {
  77   { "Magic",      MachO::MH_MAGIC    },
  78   { "Cigam",      MachO::MH_CIGAM    },
  79   { "Magic64",    MachO::MH_MAGIC_64 },
  80   { "Cigam64",    MachO::MH_CIGAM_64 },
  81   { "FatMagic",   MachO::FAT_MAGIC   },
  82   { "FatCigam",   MachO::FAT_CIGAM   },
  83 };
  84
  85 static const EnumEntry<uint32_t> MachOHeaderFileTypes[] = {
  86   { "Relocatable",          MachO::MH_OBJECT      },
  87   { "Executable",           MachO::MH_EXECUTE     },
  88   { "FixedVMLibrary",       MachO::MH_FVMLIB      },
  89   { "Core",                 MachO::MH_CORE        },
  90   { "PreloadedExecutable",  MachO::MH_PRELOAD     },
  91   { "DynamicLibrary",       MachO::MH_DYLIB       },
  92   { "DynamicLinker",        MachO::MH_DYLINKER    },
  93   { "Bundle",               MachO::MH_BUNDLE      },
  94   { "DynamicLibraryStub",   MachO::MH_DYLIB_STUB  },
  95   { "DWARFSymbol",          MachO::MH_DSYM        },
  96   { "KextBundle",           MachO::MH_KEXT_BUNDLE },
  97 };
  98
  99 static const EnumEntry<uint32_t> MachOHeaderCpuTypes[] = {
 100   { "Any"       , static_cast<uint32_t>(MachO::CPU_TYPE_ANY) },
 101   { "X86"       , MachO::CPU_TYPE_X86       },
 102   { "X86-64"    , MachO::CPU_TYPE_X86_64    },
 103   { "Mc98000"   , MachO::CPU_TYPE_MC98000   },
 104   { "Arm"       , MachO::CPU_TYPE_ARM       },
 105   { "Arm64"     , MachO::CPU_TYPE_ARM64     },
 106   { "Sparc"     , MachO::CPU_TYPE_SPARC     },
 107   { "PowerPC"   , MachO::CPU_TYPE_POWERPC   },
 108   { "PowerPC64" , MachO::CPU_TYPE_POWERPC64 },
 109 };
 110
 111 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX86[] = {
 112   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_I386_ALL),
 113   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_386),
 114   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486),
 115   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486SX),
 116   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_586),
 117   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTPRO),
 118   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M3),
 119   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M5),
 120   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON),
 121   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON_MOBILE),
 122   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3),
 123   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_M),
 124   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_XEON),
 125   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_M),
 126   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4),
 127   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4_M),
 128   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM),
 129   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM_2),
 130   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON),
 131   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON_MP),
 132 };
 133
 134 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX64[] = {
 135   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_ALL),
 136   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_ARCH1),
 137   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_H),
 138 };
 139
 140 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM[] = {
 141   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_ALL),
 142   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V4T),
 143   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6),
 144   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5),
 145   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5TEJ),
 146   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_XSCALE),
 147   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7),
 148   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7S),
 149   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7K),
 150   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6M),
 151   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7M),
 152   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7EM),
 153 };
 154
 155 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM64[] = {
 156   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64_ALL),
 157 };
 158
 159 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesSPARC[] = {
 160   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_SPARC_ALL),
 161 };
 162
 163 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesPPC[] = {
 164   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_ALL),
 165   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_601),
 166   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_602),
 167   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603),
 168   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603e),
 169   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603ev),
 170   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604),
 171   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604e),
 172   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_620),
 173   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_750),
 174   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7400),
 175   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7450),
 176   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_970),
 177 };
 178
 179 static const EnumEntry<uint32_t> MachOHeaderFlags[] = {
 180   LLVM_READOBJ_ENUM_ENT(MachO, MH_NOUNDEFS),
 181   LLVM_READOBJ_ENUM_ENT(MachO, MH_INCRLINK),
 182   LLVM_READOBJ_ENUM_ENT(MachO, MH_DYLDLINK),
 183   LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDATLOAD),
 184   LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBOUND),
 185   LLVM_READOBJ_ENUM_ENT(MachO, MH_SPLIT_SEGS),
 186   LLVM_READOBJ_ENUM_ENT(MachO, MH_LAZY_INIT),
 187   LLVM_READOBJ_ENUM_ENT(MachO, MH_TWOLEVEL),
 188   LLVM_READOBJ_ENUM_ENT(MachO, MH_FORCE_FLAT),
 189   LLVM_READOBJ_ENUM_ENT(MachO, MH_NOMULTIDEFS),
 190   LLVM_READOBJ_ENUM_ENT(MachO, MH_NOFIXPREBINDING),
 191   LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBINDABLE),
 192   LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLMODSBOUND),
 193   LLVM_READOBJ_ENUM_ENT(MachO, MH_SUBSECTIONS_VIA_SYMBOLS),
 194   LLVM_READOBJ_ENUM_ENT(MachO, MH_CANONICAL),
 195   LLVM_READOBJ_ENUM_ENT(MachO, MH_WEAK_DEFINES),
 196   LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDS_TO_WEAK),
 197   LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLOW_STACK_EXECUTION),
 198   LLVM_READOBJ_ENUM_ENT(MachO, MH_ROOT_SAFE),
 199   LLVM_READOBJ_ENUM_ENT(MachO, MH_SETUID_SAFE),
 200   LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_REEXPORTED_DYLIBS),
 201   LLVM_READOBJ_ENUM_ENT(MachO, MH_PIE),
 202   LLVM_READOBJ_ENUM_ENT(MachO, MH_DEAD_STRIPPABLE_DYLIB),
 203   LLVM_READOBJ_ENUM_ENT(MachO, MH_HAS_TLV_DESCRIPTORS),
 204   LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_HEAP_EXECUTION),
 205   LLVM_READOBJ_ENUM_ENT(MachO, MH_APP_EXTENSION_SAFE),
 206 };
 207
 208 static const EnumEntry<unsigned> MachOSectionAttributes[] = {
 209   { "LocReloc"         , 1 <<  0 /*S_ATTR_LOC_RELOC          */ },
 210   { "ExtReloc"         , 1 <<  1 /*S_ATTR_EXT_RELOC          */ },
 211   { "SomeInstructions" , 1 <<  2 /*S_ATTR_SOME_INSTRUCTIONS  */ },
 212   { "Debug"            , 1 << 17 /*S_ATTR_DEBUG              */ },
 213   { "SelfModifyingCode", 1 << 18 /*S_ATTR_SELF_MODIFYING_CODE*/ },
 214   { "LiveSupport"      , 1 << 19 /*S_ATTR_LIVE_SUPPORT       */ },
 215   { "NoDeadStrip"      , 1 << 20 /*S_ATTR_NO_DEAD_STRIP      */ },
 216   { "StripStaticSyms"  , 1 << 21 /*S_ATTR_STRIP_STATIC_SYMS  */ },
 217   { "NoTOC"            , 1 << 22 /*S_ATTR_NO_TOC             */ },
 218   { "PureInstructions" , 1 << 23 /*S_ATTR_PURE_INSTRUCTIONS  */ },
 219 };
 220
 221 static const EnumEntry<unsigned> MachOSymbolRefTypes[] = {
 222   { "UndefinedNonLazy",                     0 },
 223   { "ReferenceFlagUndefinedLazy",           1 },
 224   { "ReferenceFlagDefined",                 2 },
 225   { "ReferenceFlagPrivateDefined",          3 },
 226   { "ReferenceFlagPrivateUndefinedNonLazy", 4 },
 227   { "ReferenceFlagPrivateUndefinedLazy",    5 }
 228 };
 229
 230 static const EnumEntry<unsigned> MachOSymbolFlags[] = {
 231   { "ReferencedDynamically", 0x10 },
 232   { "NoDeadStrip",           0x20 },
 233   { "WeakRef",               0x40 },
 234   { "WeakDef",               0x80 }
 235 };
 236
 237 static const EnumEntry<unsigned> MachOSymbolTypes[] = {
 238   { "Undef",           0x0 },
 239   { "Abs",             0x2 },
 240   { "Indirect",        0xA },
 241   { "PreboundUndef",   0xC },
 242   { "Section",         0xE }
 243 };
 244
 245 namespace {
 246   struct MachOSection {
 247     ArrayRef<char> Name;
 248     ArrayRef<char> SegmentName;
 249     uint64_t Address;
 250     uint64_t Size;
 251     uint32_t Offset;
 252     uint32_t Alignment;
 253     uint32_t RelocationTableOffset;
 254     uint32_t NumRelocationTableEntries;
 255     uint32_t Flags;
 256     uint32_t Reserved1;
 257     uint32_t Reserved2;
 258   };
 259
 260   struct MachOSymbol {
 261     uint32_t StringIndex;
 262     uint8_t Type;
 263     uint8_t SectionIndex;
 264     uint16_t Flags;
 265     uint64_t Value;
 266   };
 267 }
 268
 269 static void getSection(const MachOObjectFile *Obj,
 270                        DataRefImpl Sec,
 271                        MachOSection &Section) {
 272   if (!Obj->is64Bit()) {
 273     MachO::section Sect = Obj->getSection(Sec);
 274     Section.Address     = Sect.addr;
 275     Section.Size        = Sect.size;
 276     Section.Offset      = Sect.offset;
 277     Section.Alignment   = Sect.align;
 278     Section.RelocationTableOffset = Sect.reloff;
 279     Section.NumRelocationTableEntries = Sect.nreloc;
 280     Section.Flags       = Sect.flags;
 281     Section.Reserved1   = Sect.reserved1;
 282     Section.Reserved2   = Sect.reserved2;
 283     return;
 284   }
 285   MachO::section_64 Sect = Obj->getSection64(Sec);
 286   Section.Address     = Sect.addr;
 287   Section.Size        = Sect.size;
 288   Section.Offset      = Sect.offset;
 289   Section.Alignment   = Sect.align;
 290   Section.RelocationTableOffset = Sect.reloff;
 291   Section.NumRelocationTableEntries = Sect.nreloc;
 292   Section.Flags       = Sect.flags;
 293   Section.Reserved1   = Sect.reserved1;
 294   Section.Reserved2   = Sect.reserved2;
 295 }
 296
 297
 298 static void getSymbol(const MachOObjectFile *Obj,
 299                       DataRefImpl DRI,
 300                       MachOSymbol &Symbol) {
 301   if (!Obj->is64Bit()) {
 302     MachO::nlist Entry = Obj->getSymbolTableEntry(DRI);
 303     Symbol.StringIndex  = Entry.n_strx;
 304     Symbol.Type         = Entry.n_type;
 305     Symbol.SectionIndex = Entry.n_sect;
 306     Symbol.Flags        = Entry.n_desc;
 307     Symbol.Value        = Entry.n_value;
 308     return;
 309   }
 310   MachO::nlist_64 Entry = Obj->getSymbol64TableEntry(DRI);
 311   Symbol.StringIndex  = Entry.n_strx;
 312   Symbol.Type         = Entry.n_type;
 313   Symbol.SectionIndex = Entry.n_sect;
 314   Symbol.Flags        = Entry.n_desc;
 315   Symbol.Value        = Entry.n_value;
 316 }
 317
 318 void MachODumper::printFileHeaders() {
 319   DictScope H(W, "MachHeader");
 320   if (!Obj->is64Bit()) {
 321     printFileHeaders(Obj->getHeader());
 322   } else {
 323     printFileHeaders(Obj->getHeader64());
 324     W.printHex("Reserved", Obj->getHeader64().reserved);
 325   }
 326 }
 327
 328 template<class MachHeader>
 329 void MachODumper::printFileHeaders(const MachHeader &Header) {
 330   W.printEnum("Magic", Header.magic, makeArrayRef(MachOMagics));
 331   W.printEnum("CpuType", Header.cputype, makeArrayRef(MachOHeaderCpuTypes));
 332   uint32_t subtype = Header.cpusubtype & ~MachO::CPU_SUBTYPE_MASK;
 333   switch (Header.cputype) {
 334   case MachO::CPU_TYPE_X86:
 335     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX86));
 336     break;
 337   case MachO::CPU_TYPE_X86_64:
 338     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX64));
 339     break;
 340   case MachO::CPU_TYPE_ARM:
 341     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM));
 342     break;
 343   case MachO::CPU_TYPE_POWERPC:
 344     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesPPC));
 345     break;
 346   case MachO::CPU_TYPE_SPARC:
 347     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesSPARC));
 348     break;
 349   case MachO::CPU_TYPE_ARM64:
 350     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM64));
 351     break;
 352   case MachO::CPU_TYPE_POWERPC64:
 353   default:
 354     W.printHex("CpuSubtype", subtype);
 355   }
 356   W.printEnum("FileType", Header.filetype, makeArrayRef(MachOHeaderFileTypes));
 357   W.printNumber("NumOfLoadCommands", Header.ncmds);
 358   W.printNumber("SizeOfLoadCommands", Header.sizeofcmds);
 359   W.printFlags("Flags", Header.flags, makeArrayRef(MachOHeaderFlags));
 360 }
 361
 362 void MachODumper::printSections() {
 363   return printSections(Obj);
 364 }
 365
 366 void MachODumper::printSections(const MachOObjectFile *Obj) {
 367   ListScope Group(W, "Sections");
 368
 369   int SectionIndex = -1;
 370   for (const SectionRef &Section : Obj->sections()) {
 371     ++SectionIndex;
 372
 373     MachOSection MOSection;
 374     getSection(Obj, Section.getRawDataRefImpl(), MOSection);
 375     DataRefImpl DR = Section.getRawDataRefImpl();
 376
 377     StringRef Name;
 378     error(Section.getName(Name));
 379
 380     ArrayRef<char> RawName = Obj->getSectionRawName(DR);
 381     StringRef SegmentName = Obj->getSectionFinalSegmentName(DR);
 382     ArrayRef<char> RawSegmentName = Obj->getSectionRawFinalSegmentName(DR);
 383
 384     DictScope SectionD(W, "Section");
 385     W.printNumber("Index", SectionIndex);
 386     W.printBinary("Name", Name, RawName);
 387     W.printBinary("Segment", SegmentName, RawSegmentName);
 388     W.printHex("Address", MOSection.Address);
 389     W.printHex("Size", MOSection.Size);
 390     W.printNumber("Offset", MOSection.Offset);
 391     W.printNumber("Alignment", MOSection.Alignment);
 392     W.printHex("RelocationOffset", MOSection.RelocationTableOffset);
 393     W.printNumber("RelocationCount", MOSection.NumRelocationTableEntries);
 394     W.printEnum("Type", MOSection.Flags & 0xFF,
 395                 makeArrayRef(MachOSectionAttributes));
 396     W.printFlags("Attributes", MOSection.Flags >> 8,
 397                  makeArrayRef(MachOSectionAttributes));
 398     W.printHex("Reserved1", MOSection.Reserved1);
 399     W.printHex("Reserved2", MOSection.Reserved2);
 400
 401     if (opts::SectionRelocations) {
 402       ListScope D(W, "Relocations");
 403       for (const RelocationRef &Reloc : Section.relocations())
 404         printRelocation(Reloc);
 405     }
 406
 407     if (opts::SectionSymbols) {
 408       ListScope D(W, "Symbols");
 409       for (const SymbolRef &Symbol : Obj->symbols()) {
 410         if (!Section.containsSymbol(Symbol))
 411           continue;
 412
 413         printSymbol(Symbol);
 414       }
 415     }
 416
 417     if (opts::SectionData) {
 418       bool IsBSS = Section.isBSS();
 419       if (!IsBSS) {
 420         StringRef Data;
 421         error(Section.getContents(Data));
 422
 423         W.printBinaryBlock("SectionData", Data);
 424       }
 425     }
 426   }
 427 }
 428
 429 void MachODumper::printRelocations() {
 430   ListScope D(W, "Relocations");
 431
 432   std::error_code EC;
 433   for (const SectionRef &Section : Obj->sections()) {
 434     StringRef Name;
 435     error(Section.getName(Name));
 436
 437     bool PrintedGroup = false;
 438     for (const RelocationRef &Reloc : Section.relocations()) {
 439       if (!PrintedGroup) {
 440         W.startLine() << "Section " << Name << " {\n";
 441         W.indent();
 442         PrintedGroup = true;
 443       }
 444
 445       printRelocation(Reloc);
 446     }
 447
 448     if (PrintedGroup) {
 449       W.unindent();
 450       W.startLine() << "}\n";
 451     }
 452   }
 453 }
 454
 455 void MachODumper::printRelocation(const RelocationRef &Reloc) {
 456   return printRelocation(Obj, Reloc);
 457 }
 458
 459 void MachODumper::printRelocation(const MachOObjectFile *Obj,
 460                                   const RelocationRef &Reloc) {
 461   uint64_t Offset = Reloc.getOffset();
 462   SmallString<32> RelocName;
 463   Reloc.getTypeName(RelocName);
 464
 465   DataRefImpl DR = Reloc.getRawDataRefImpl();
 466   MachO::any_relocation_info RE = Obj->getRelocation(DR);
 467   bool IsScattered = Obj->isRelocationScattered(RE);
 468   bool IsExtern = !IsScattered && Obj->getPlainRelocationExternal(RE);
 469
 470   StringRef TargetName;
 471   if (IsExtern) {
 472     symbol_iterator Symbol = Reloc.getSymbol();
 473     if (Symbol != Obj->symbol_end()) {
 474       ErrorOr<StringRef> TargetNameOrErr = Symbol->getName();
 475       error(TargetNameOrErr.getError());
 476       TargetName = *TargetNameOrErr;
 477     }
 478   } else if (!IsScattered) {
 479     section_iterator SecI = Obj->getRelocationSection(DR);
 480     if (SecI != Obj->section_end()) {
 481       error(SecI->getName(TargetName));
 482     }
 483   }
 484   if (TargetName.empty())
 485     TargetName = "-";
 486
 487   if (opts::ExpandRelocs) {
 488     DictScope Group(W, "Relocation");
 489     W.printHex("Offset", Offset);
 490     W.printNumber("PCRel", Obj->getAnyRelocationPCRel(RE));
 491     W.printNumber("Length", Obj->getAnyRelocationLength(RE));
 492     W.printNumber("Type", RelocName, Obj->getAnyRelocationType(RE));
 493     if (IsScattered) {
 494       W.printHex("Value", Obj->getScatteredRelocationValue(RE));
 495     } else {
 496       const char *Kind = IsExtern ? "Symbol" : "Section";
 497       W.printNumber(Kind, TargetName, Obj->getPlainRelocationSymbolNum(RE));
 498     }
 499   } else {
 500     SmallString<32> SymbolNameOrOffset("0x");
 501     if (IsScattered) {
 502       // Scattered relocations don't really have an associated symbol for some
 503       // reason, even if one exists in the symtab at the correct address.
 504       SymbolNameOrOffset += utohexstr(Obj->getScatteredRelocationValue(RE));
 505     } else {
 506       SymbolNameOrOffset = TargetName;
 507     }
 508
 509     raw_ostream& OS = W.startLine();
 510     OS << W.hex(Offset)
 511        << " " << Obj->getAnyRelocationPCRel(RE)
 512        << " " << Obj->getAnyRelocationLength(RE);
 513     if (IsScattered)
 514       OS << " n/a";
 515     else
 516       OS << " " << Obj->getPlainRelocationExternal(RE);
 517     OS << " " << RelocName
 518        << " " << IsScattered
 519        << " " << SymbolNameOrOffset
 520        << "\n";
 521   }
 522 }
 523
 524 void MachODumper::printSymbols() {
 525   ListScope Group(W, "Symbols");
 526
 527   for (const SymbolRef &Symbol : Obj->symbols()) {
 528     printSymbol(Symbol);
 529   }
 530 }
 531
 532 void MachODumper::printDynamicSymbols() {
 533   ListScope Group(W, "DynamicSymbols");
 534 }
 535
 536 void MachODumper::printSymbol(const SymbolRef &Symbol) {
 537   StringRef SymbolName;
 538   if (ErrorOr<StringRef> SymbolNameOrErr = Symbol.getName())
 539     SymbolName = *SymbolNameOrErr;
 540
 541   MachOSymbol MOSymbol;
 542   getSymbol(Obj, Symbol.getRawDataRefImpl(), MOSymbol);
 543
 544   StringRef SectionName = "";
 545   ErrorOr<section_iterator> SecIOrErr = Symbol.getSection();
 546   error(SecIOrErr.getError());
 547   section_iterator SecI = *SecIOrErr;
 548   if (SecI != Obj->section_end())
 549     error(SecI->getName(SectionName));
 550
 551   DictScope D(W, "Symbol");
 552   W.printNumber("Name", SymbolName, MOSymbol.StringIndex);
 553   if (MOSymbol.Type & MachO::N_STAB) {
 554     W.printHex("Type", "SymDebugTable", MOSymbol.Type);
 555   } else {
 556     if (MOSymbol.Type & MachO::N_PEXT)
 557       W.startLine() << "PrivateExtern\n";
 558     if (MOSymbol.Type & MachO::N_EXT)
 559       W.startLine() << "Extern\n";
 560     W.printEnum("Type", uint8_t(MOSymbol.Type & MachO::N_TYPE),
 561                 makeArrayRef(MachOSymbolTypes));
 562   }
 563   W.printHex("Section", SectionName, MOSymbol.SectionIndex);
 564   W.printEnum("RefType", static_cast<uint16_t>(MOSymbol.Flags & 0xF),
 565               makeArrayRef(MachOSymbolRefTypes));
 566   W.printFlags("Flags", static_cast<uint16_t>(MOSymbol.Flags & ~0xF),
 567                makeArrayRef(MachOSymbolFlags));
 568   W.printHex("Value", MOSymbol.Value);
 569 }
 570
 571 void MachODumper::printUnwindInfo() {
 572   W.startLine() << "UnwindInfo not implemented.\n";
 573 }
 574
 575 void MachODumper::printStackMap() const {
 576   object::SectionRef StackMapSection;
 577   for (auto Sec : Obj->sections()) {
 578     StringRef Name;
 579     Sec.getName(Name);
 580     if (Name == "__llvm_stackmaps") {
 581       StackMapSection = Sec;
 582       break;
 583     }
 584   }
 585
 586   if (StackMapSection == object::SectionRef())
 587     return;
 588
 589   StringRef StackMapContents;
 590   StackMapSection.getContents(StackMapContents);
 591   ArrayRef<uint8_t> StackMapContentsArray(
 592       reinterpret_cast<const uint8_t*>(StackMapContents.data()),
 593       StackMapContents.size());
 594
 595   if (Obj->isLittleEndian())
 596      prettyPrintStackMap(
 597                       llvm::outs(),
 598                       StackMapV1Parser<support::little>(StackMapContentsArray));
 599   else
 600      prettyPrintStackMap(llvm::outs(),
 601                          StackMapV1Parser<support::big>(StackMapContentsArray));
 602 }