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 "StreamWriter.h"
  18 #include "llvm/ADT/SmallString.h"
  19 #include "llvm/ADT/StringExtras.h"
  20 #include "llvm/Object/MachO.h"
  21 #include "llvm/Support/Casting.h"
  22
  23 using namespace llvm;
  24 using namespace object;
  25
  26 namespace {
  27
  28 class MachODumper : public ObjDumper {
  29 public:
  30   MachODumper(const MachOObjectFile *Obj, StreamWriter& Writer)
  31     : ObjDumper(Writer)
  32     , Obj(Obj) { }
  33
  34   void printFileHeaders() override;
  35   void printSections() override;
  36   void printRelocations() override;
  37   void printSymbols() override;
  38   void printDynamicSymbols() override;
  39   void printUnwindInfo() override;
  40
  41 private:
  42   template<class MachHeader>
  43   void printFileHeaders(const MachHeader &Header);
  44
  45   void printSymbol(const SymbolRef &Symbol);
  46
  47   void printRelocation(const RelocationRef &Reloc);
  48
  49   void printRelocation(const MachOObjectFile *Obj, const RelocationRef &Reloc);
  50
  51   void printSections(const MachOObjectFile *Obj);
  52
  53   const MachOObjectFile *Obj;
  54 };
  55
  56 } // namespace
  57
  58
  59 namespace llvm {
  60
  61 std::error_code createMachODumper(const object::ObjectFile *Obj,
  62                                   StreamWriter &Writer,
  63                                   std::unique_ptr<ObjDumper> &Result) {
  64   const MachOObjectFile *MachOObj = dyn_cast<MachOObjectFile>(Obj);
  65   if (!MachOObj)
  66     return readobj_error::unsupported_obj_file_format;
  67
  68   Result.reset(new MachODumper(MachOObj, Writer));
  69   return readobj_error::success;
  70 }
  71
  72 } // namespace llvm
  73
  74 static const EnumEntry<uint32_t> MachOMagics[] = {
  75   { "Magic",      MachO::MH_MAGIC    },
  76   { "Cigam",      MachO::MH_CIGAM    },
  77   { "Magic64",    MachO::MH_MAGIC_64 },
  78   { "Cigam64",    MachO::MH_CIGAM_64 },
  79   { "FatMagic",   MachO::FAT_MAGIC   },
  80   { "FatCigam",   MachO::FAT_CIGAM   },
  81 };
  82
  83 static const EnumEntry<uint32_t> MachOHeaderFileTypes[] = {
  84   { "Relocatable",          MachO::MH_OBJECT      },
  85   { "Executable",           MachO::MH_EXECUTE     },
  86   { "FixedVMLibrary",       MachO::MH_FVMLIB      },
  87   { "Core",                 MachO::MH_CORE        },
  88   { "PreloadedExecutable",  MachO::MH_PRELOAD     },
  89   { "DynamicLibrary",       MachO::MH_DYLIB       },
  90   { "DynamicLinker",        MachO::MH_DYLINKER    },
  91   { "Bundle",               MachO::MH_BUNDLE      },
  92   { "DynamicLibraryStub",   MachO::MH_DYLIB_STUB  },
  93   { "DWARFSymbol",          MachO::MH_DSYM        },
  94   { "KextBundle",           MachO::MH_KEXT_BUNDLE },
  95 };
  96
  97 static const EnumEntry<uint32_t> MachOHeaderCpuTypes[] = {
  98   { "Any"       , static_cast<uint32_t>(MachO::CPU_TYPE_ANY) },
  99   { "X86"       , MachO::CPU_TYPE_X86       },
 100   { "X86-64"    , MachO::CPU_TYPE_X86_64    },
 101   { "Mc98000"   , MachO::CPU_TYPE_MC98000   },
 102   { "Arm"       , MachO::CPU_TYPE_ARM       },
 103   { "Arm64"     , MachO::CPU_TYPE_ARM64     },
 104   { "Sparc"     , MachO::CPU_TYPE_SPARC     },
 105   { "PowerPC"   , MachO::CPU_TYPE_POWERPC   },
 106   { "PowerPC64" , MachO::CPU_TYPE_POWERPC64 },
 107 };
 108
 109 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX86[] = {
 110   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_I386_ALL),
 111   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_386),
 112   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486),
 113   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486SX),
 114   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_586),
 115   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTPRO),
 116   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M3),
 117   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M5),
 118   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON),
 119   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON_MOBILE),
 120   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3),
 121   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_M),
 122   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_XEON),
 123   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_M),
 124   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4),
 125   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4_M),
 126   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM),
 127   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM_2),
 128   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON),
 129   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON_MP),
 130 };
 131
 132 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX64[] = {
 133   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_ALL),
 134   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_ARCH1),
 135   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_H),
 136 };
 137
 138 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM[] = {
 139   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_ALL),
 140   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V4T),
 141   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6),
 142   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5),
 143   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5TEJ),
 144   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_XSCALE),
 145   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7),
 146   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7S),
 147   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7K),
 148   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6M),
 149   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7M),
 150   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7EM),
 151 };
 152
 153 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM64[] = {
 154   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64_ALL),
 155 };
 156
 157 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesSPARC[] = {
 158   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_SPARC_ALL),
 159 };
 160
 161 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesPPC[] = {
 162   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_ALL),
 163   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_601),
 164   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_602),
 165   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603),
 166   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603e),
 167   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603ev),
 168   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604),
 169   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604e),
 170   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_620),
 171   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_750),
 172   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7400),
 173   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7450),
 174   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_970),
 175 };
 176
 177 static const EnumEntry<uint32_t> MachOHeaderFlags[] = {
 178   LLVM_READOBJ_ENUM_ENT(MachO, MH_NOUNDEFS),
 179   LLVM_READOBJ_ENUM_ENT(MachO, MH_INCRLINK),
 180   LLVM_READOBJ_ENUM_ENT(MachO, MH_DYLDLINK),
 181   LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDATLOAD),
 182   LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBOUND),
 183   LLVM_READOBJ_ENUM_ENT(MachO, MH_SPLIT_SEGS),
 184   LLVM_READOBJ_ENUM_ENT(MachO, MH_LAZY_INIT),
 185   LLVM_READOBJ_ENUM_ENT(MachO, MH_TWOLEVEL),
 186   LLVM_READOBJ_ENUM_ENT(MachO, MH_FORCE_FLAT),
 187   LLVM_READOBJ_ENUM_ENT(MachO, MH_NOMULTIDEFS),
 188   LLVM_READOBJ_ENUM_ENT(MachO, MH_NOFIXPREBINDING),
 189   LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBINDABLE),
 190   LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLMODSBOUND),
 191   LLVM_READOBJ_ENUM_ENT(MachO, MH_SUBSECTIONS_VIA_SYMBOLS),
 192   LLVM_READOBJ_ENUM_ENT(MachO, MH_CANONICAL),
 193   LLVM_READOBJ_ENUM_ENT(MachO, MH_WEAK_DEFINES),
 194   LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDS_TO_WEAK),
 195   LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLOW_STACK_EXECUTION),
 196   LLVM_READOBJ_ENUM_ENT(MachO, MH_ROOT_SAFE),
 197   LLVM_READOBJ_ENUM_ENT(MachO, MH_SETUID_SAFE),
 198   LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_REEXPORTED_DYLIBS),
 199   LLVM_READOBJ_ENUM_ENT(MachO, MH_PIE),
 200   LLVM_READOBJ_ENUM_ENT(MachO, MH_DEAD_STRIPPABLE_DYLIB),
 201   LLVM_READOBJ_ENUM_ENT(MachO, MH_HAS_TLV_DESCRIPTORS),
 202   LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_HEAP_EXECUTION),
 203   LLVM_READOBJ_ENUM_ENT(MachO, MH_APP_EXTENSION_SAFE),
 204 };
 205
 206 static const EnumEntry<unsigned> MachOSectionTypes[] = {
 207   { "Regular"                        , 0x00 },
 208   { "ZeroFill"                       , 0x01 },
 209   { "CStringLiterals"                , 0x02 },
 210   { "4ByteLiterals"                  , 0x03 },
 211   { "8ByteLiterals"                  , 0x04 },
 212   { "LiteralPointers"                , 0x05 },
 213   { "NonLazySymbolPointers"          , 0x06 },
 214   { "LazySymbolPointers"             , 0x07 },
 215   { "SymbolStubs"                    , 0x08 },
 216   { "ModInitFuncs"                   , 0x09 },
 217   { "ModTermFuncs"                   , 0x0A },
 218   { "Coalesced"                      , 0x0B },
 219   { "GBZeroFill"                     , 0x0C },
 220   { "Interposing"                    , 0x0D },
 221   { "16ByteLiterals"                 , 0x0E },
 222   { "DTraceDOF"                      , 0x0F },
 223   { "LazyDylibSymbolPoints"          , 0x10 },
 224   { "ThreadLocalRegular"             , 0x11 },
 225   { "ThreadLocalZerofill"            , 0x12 },
 226   { "ThreadLocalVariables"           , 0x13 },
 227   { "ThreadLocalVariablePointers"    , 0x14 },
 228   { "ThreadLocalInitFunctionPointers", 0x15 }
 229 };
 230
 231 static const EnumEntry<unsigned> MachOSectionAttributes[] = {
 232   { "LocReloc"         , 1 <<  0 /*S_ATTR_LOC_RELOC          */ },
 233   { "ExtReloc"         , 1 <<  1 /*S_ATTR_EXT_RELOC          */ },
 234   { "SomeInstructions" , 1 <<  2 /*S_ATTR_SOME_INSTRUCTIONS  */ },
 235   { "Debug"            , 1 << 17 /*S_ATTR_DEBUG              */ },
 236   { "SelfModifyingCode", 1 << 18 /*S_ATTR_SELF_MODIFYING_CODE*/ },
 237   { "LiveSupport"      , 1 << 19 /*S_ATTR_LIVE_SUPPORT       */ },
 238   { "NoDeadStrip"      , 1 << 20 /*S_ATTR_NO_DEAD_STRIP      */ },
 239   { "StripStaticSyms"  , 1 << 21 /*S_ATTR_STRIP_STATIC_SYMS  */ },
 240   { "NoTOC"            , 1 << 22 /*S_ATTR_NO_TOC             */ },
 241   { "PureInstructions" , 1 << 23 /*S_ATTR_PURE_INSTRUCTIONS  */ },
 242 };
 243
 244 static const EnumEntry<unsigned> MachOSymbolRefTypes[] = {
 245   { "UndefinedNonLazy",                     0 },
 246   { "ReferenceFlagUndefinedLazy",           1 },
 247   { "ReferenceFlagDefined",                 2 },
 248   { "ReferenceFlagPrivateDefined",          3 },
 249   { "ReferenceFlagPrivateUndefinedNonLazy", 4 },
 250   { "ReferenceFlagPrivateUndefinedLazy",    5 }
 251 };
 252
 253 static const EnumEntry<unsigned> MachOSymbolFlags[] = {
 254   { "ReferencedDynamically", 0x10 },
 255   { "NoDeadStrip",           0x20 },
 256   { "WeakRef",               0x40 },
 257   { "WeakDef",               0x80 }
 258 };
 259
 260 static const EnumEntry<unsigned> MachOSymbolTypes[] = {
 261   { "Undef",           0x0 },
 262   { "Abs",             0x2 },
 263   { "Indirect",        0xA },
 264   { "PreboundUndef",   0xC },
 265   { "Section",         0xE }
 266 };
 267
 268 namespace {
 269   struct MachOSection {
 270     ArrayRef<char> Name;
 271     ArrayRef<char> SegmentName;
 272     uint64_t Address;
 273     uint64_t Size;
 274     uint32_t Offset;
 275     uint32_t Alignment;
 276     uint32_t RelocationTableOffset;
 277     uint32_t NumRelocationTableEntries;
 278     uint32_t Flags;
 279     uint32_t Reserved1;
 280     uint32_t Reserved2;
 281   };
 282
 283   struct MachOSymbol {
 284     uint32_t StringIndex;
 285     uint8_t Type;
 286     uint8_t SectionIndex;
 287     uint16_t Flags;
 288     uint64_t Value;
 289   };
 290 }
 291
 292 static void getSection(const MachOObjectFile *Obj,
 293                        DataRefImpl Sec,
 294                        MachOSection &Section) {
 295   if (!Obj->is64Bit()) {
 296     MachO::section Sect = Obj->getSection(Sec);
 297     Section.Address     = Sect.addr;
 298     Section.Size        = Sect.size;
 299     Section.Offset      = Sect.offset;
 300     Section.Alignment   = Sect.align;
 301     Section.RelocationTableOffset = Sect.reloff;
 302     Section.NumRelocationTableEntries = Sect.nreloc;
 303     Section.Flags       = Sect.flags;
 304     Section.Reserved1   = Sect.reserved1;
 305     Section.Reserved2   = Sect.reserved2;
 306     return;
 307   }
 308   MachO::section_64 Sect = Obj->getSection64(Sec);
 309   Section.Address     = Sect.addr;
 310   Section.Size        = Sect.size;
 311   Section.Offset      = Sect.offset;
 312   Section.Alignment   = Sect.align;
 313   Section.RelocationTableOffset = Sect.reloff;
 314   Section.NumRelocationTableEntries = Sect.nreloc;
 315   Section.Flags       = Sect.flags;
 316   Section.Reserved1   = Sect.reserved1;
 317   Section.Reserved2   = Sect.reserved2;
 318 }
 319
 320
 321 static void getSymbol(const MachOObjectFile *Obj,
 322                       DataRefImpl DRI,
 323                       MachOSymbol &Symbol) {
 324   if (!Obj->is64Bit()) {
 325     MachO::nlist Entry = Obj->getSymbolTableEntry(DRI);
 326     Symbol.StringIndex  = Entry.n_strx;
 327     Symbol.Type         = Entry.n_type;
 328     Symbol.SectionIndex = Entry.n_sect;
 329     Symbol.Flags        = Entry.n_desc;
 330     Symbol.Value        = Entry.n_value;
 331     return;
 332   }
 333   MachO::nlist_64 Entry = Obj->getSymbol64TableEntry(DRI);
 334   Symbol.StringIndex  = Entry.n_strx;
 335   Symbol.Type         = Entry.n_type;
 336   Symbol.SectionIndex = Entry.n_sect;
 337   Symbol.Flags        = Entry.n_desc;
 338   Symbol.Value        = Entry.n_value;
 339 }
 340
 341 void MachODumper::printFileHeaders() {
 342   DictScope H(W, "MachHeader");
 343   if (!Obj->is64Bit()) {
 344     printFileHeaders(Obj->getHeader());
 345   } else {
 346     printFileHeaders(Obj->getHeader64());
 347     W.printHex("Reserved", Obj->getHeader64().reserved);
 348   }
 349 }
 350
 351 template<class MachHeader>
 352 void MachODumper::printFileHeaders(const MachHeader &Header) {
 353   W.printEnum("Magic", Header.magic, makeArrayRef(MachOMagics));
 354   W.printEnum("CpuType", Header.cputype, makeArrayRef(MachOHeaderCpuTypes));
 355   uint32_t subtype = Header.cpusubtype & ~MachO::CPU_SUBTYPE_MASK;
 356   switch (Header.cputype) {
 357   case MachO::CPU_TYPE_X86:
 358     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX86));
 359     break;
 360   case MachO::CPU_TYPE_X86_64:
 361     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX64));
 362     break;
 363   case MachO::CPU_TYPE_ARM:
 364     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM));
 365     break;
 366   case MachO::CPU_TYPE_POWERPC:
 367     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesPPC));
 368     break;
 369   case MachO::CPU_TYPE_SPARC:
 370     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesSPARC));
 371     break;
 372   case MachO::CPU_TYPE_ARM64:
 373     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM64));
 374     break;
 375   case MachO::CPU_TYPE_POWERPC64:
 376   default:
 377     W.printHex("CpuSubtype", subtype);
 378   }
 379   W.printEnum("FileType", Header.filetype, makeArrayRef(MachOHeaderFileTypes));
 380   W.printNumber("NumOfLoadCommands", Header.ncmds);
 381   W.printNumber("SizeOfLoadCommands", Header.sizeofcmds);
 382   W.printFlags("Flags", Header.flags, makeArrayRef(MachOHeaderFlags));
 383 }
 384
 385 void MachODumper::printSections() {
 386   return printSections(Obj);
 387 }
 388
 389 void MachODumper::printSections(const MachOObjectFile *Obj) {
 390   ListScope Group(W, "Sections");
 391
 392   int SectionIndex = -1;
 393   for (const SectionRef &Section : Obj->sections()) {
 394     ++SectionIndex;
 395
 396     MachOSection MOSection;
 397     getSection(Obj, Section.getRawDataRefImpl(), MOSection);
 398     DataRefImpl DR = Section.getRawDataRefImpl();
 399
 400     StringRef Name;
 401     if (error(Section.getName(Name)))
 402       Name = "";
 403
 404     ArrayRef<char> RawName = Obj->getSectionRawName(DR);
 405     StringRef SegmentName = Obj->getSectionFinalSegmentName(DR);
 406     ArrayRef<char> RawSegmentName = Obj->getSectionRawFinalSegmentName(DR);
 407
 408     DictScope SectionD(W, "Section");
 409     W.printNumber("Index", SectionIndex);
 410     W.printBinary("Name", Name, RawName);
 411     W.printBinary("Segment", SegmentName, RawSegmentName);
 412     W.printHex("Address", MOSection.Address);
 413     W.printHex("Size", MOSection.Size);
 414     W.printNumber("Offset", MOSection.Offset);
 415     W.printNumber("Alignment", MOSection.Alignment);
 416     W.printHex("RelocationOffset", MOSection.RelocationTableOffset);
 417     W.printNumber("RelocationCount", MOSection.NumRelocationTableEntries);
 418     W.printEnum("Type", MOSection.Flags & 0xFF,
 419                 makeArrayRef(MachOSectionAttributes));
 420     W.printFlags("Attributes", MOSection.Flags >> 8,
 421                  makeArrayRef(MachOSectionAttributes));
 422     W.printHex("Reserved1", MOSection.Reserved1);
 423     W.printHex("Reserved2", MOSection.Reserved2);
 424
 425     if (opts::SectionRelocations) {
 426       ListScope D(W, "Relocations");
 427       for (const RelocationRef &Reloc : Section.relocations())
 428         printRelocation(Reloc);
 429     }
 430
 431     if (opts::SectionSymbols) {
 432       ListScope D(W, "Symbols");
 433       for (const SymbolRef &Symbol : Obj->symbols()) {
 434         if (!Section.containsSymbol(Symbol))
 435           continue;
 436
 437         printSymbol(Symbol);
 438       }
 439     }
 440
 441     if (opts::SectionData) {
 442       bool IsBSS = Section.isBSS();
 443       if (!IsBSS) {
 444         StringRef Data;
 445         if (error(Section.getContents(Data)))
 446           break;
 447
 448         W.printBinaryBlock("SectionData", Data);
 449       }
 450     }
 451   }
 452 }
 453
 454 void MachODumper::printRelocations() {
 455   ListScope D(W, "Relocations");
 456
 457   std::error_code EC;
 458   for (const SectionRef &Section : Obj->sections()) {
 459     StringRef Name;
 460     if (error(Section.getName(Name)))
 461       continue;
 462
 463     bool PrintedGroup = false;
 464     for (const RelocationRef &Reloc : Section.relocations()) {
 465       if (!PrintedGroup) {
 466         W.startLine() << "Section " << Name << " {\n";
 467         W.indent();
 468         PrintedGroup = true;
 469       }
 470
 471       printRelocation(Reloc);
 472     }
 473
 474     if (PrintedGroup) {
 475       W.unindent();
 476       W.startLine() << "}\n";
 477     }
 478   }
 479 }
 480
 481 void MachODumper::printRelocation(const RelocationRef &Reloc) {
 482   return printRelocation(Obj, Reloc);
 483 }
 484
 485 void MachODumper::printRelocation(const MachOObjectFile *Obj,
 486                                   const RelocationRef &Reloc) {
 487   uint64_t Offset;
 488   SmallString<32> RelocName;
 489   if (error(Reloc.getOffset(Offset)))
 490     return;
 491   if (error(Reloc.getTypeName(RelocName)))
 492     return;
 493
 494   DataRefImpl DR = Reloc.getRawDataRefImpl();
 495   MachO::any_relocation_info RE = Obj->getRelocation(DR);
 496   bool IsScattered = Obj->isRelocationScattered(RE);
 497   SmallString<32> SymbolNameOrOffset("0x");
 498   if (IsScattered) {
 499     // Scattered relocations don't really have an associated symbol
 500     // for some reason, even if one exists in the symtab at the correct address.
 501     SymbolNameOrOffset += utohexstr(Obj->getScatteredRelocationValue(RE));
 502   } else {
 503     symbol_iterator Symbol = Reloc.getSymbol();
 504     if (Symbol != Obj->symbol_end()) {
 505       StringRef SymbolName;
 506       if (error(Symbol->getName(SymbolName)))
 507         return;
 508       SymbolNameOrOffset = SymbolName;
 509     } else
 510       SymbolNameOrOffset += utohexstr(Obj->getPlainRelocationSymbolNum(RE));
 511   }
 512
 513   if (opts::ExpandRelocs) {
 514     DictScope Group(W, "Relocation");
 515     W.printHex("Offset", Offset);
 516     W.printNumber("PCRel", Obj->getAnyRelocationPCRel(RE));
 517     W.printNumber("Length", Obj->getAnyRelocationLength(RE));
 518     if (IsScattered)
 519       W.printString("Extern", StringRef("N/A"));
 520     else
 521       W.printNumber("Extern", Obj->getPlainRelocationExternal(RE));
 522     W.printNumber("Type", RelocName, Obj->getAnyRelocationType(RE));
 523     W.printString("Symbol", SymbolNameOrOffset);
 524     W.printNumber("Scattered", IsScattered);
 525   } else {
 526     raw_ostream& OS = W.startLine();
 527     OS << W.hex(Offset)
 528        << " " << Obj->getAnyRelocationPCRel(RE)
 529        << " " << Obj->getAnyRelocationLength(RE);
 530     if (IsScattered)
 531       OS << " n/a";
 532     else
 533       OS << " " << Obj->getPlainRelocationExternal(RE);
 534     OS << " " << RelocName
 535        << " " << IsScattered
 536        << " " << SymbolNameOrOffset
 537        << "\n";
 538   }
 539 }
 540
 541 void MachODumper::printSymbols() {
 542   ListScope Group(W, "Symbols");
 543
 544   for (const SymbolRef &Symbol : Obj->symbols()) {
 545     printSymbol(Symbol);
 546   }
 547 }
 548
 549 void MachODumper::printDynamicSymbols() {
 550   ListScope Group(W, "DynamicSymbols");
 551 }
 552
 553 void MachODumper::printSymbol(const SymbolRef &Symbol) {
 554   StringRef SymbolName;
 555   if (Symbol.getName(SymbolName))
 556     SymbolName = "";
 557
 558   MachOSymbol MOSymbol;
 559   getSymbol(Obj, Symbol.getRawDataRefImpl(), MOSymbol);
 560
 561   StringRef SectionName = "";
 562   section_iterator SecI(Obj->section_begin());
 563   if (!error(Symbol.getSection(SecI)) && SecI != Obj->section_end())
 564     error(SecI->getName(SectionName));
 565
 566   DictScope D(W, "Symbol");
 567   W.printNumber("Name", SymbolName, MOSymbol.StringIndex);
 568   if (MOSymbol.Type & MachO::N_STAB) {
 569     W.printHex("Type", "SymDebugTable", MOSymbol.Type);
 570   } else {
 571     if (MOSymbol.Type & MachO::N_PEXT)
 572       W.startLine() << "PrivateExtern\n";
 573     if (MOSymbol.Type & MachO::N_EXT)
 574       W.startLine() << "Extern\n";
 575     W.printEnum("Type", uint8_t(MOSymbol.Type & MachO::N_TYPE),
 576                 makeArrayRef(MachOSymbolTypes));
 577   }
 578   W.printHex("Section", SectionName, MOSymbol.SectionIndex);
 579   W.printEnum("RefType", static_cast<uint16_t>(MOSymbol.Flags & 0xF),
 580               makeArrayRef(MachOSymbolRefTypes));
 581   W.printFlags("Flags", static_cast<uint16_t>(MOSymbol.Flags & ~0xF),
 582                makeArrayRef(MachOSymbolFlags));
 583   W.printHex("Value", MOSymbol.Value);
 584 }
 585
 586 void MachODumper::printUnwindInfo() {
 587   W.startLine() << "UnwindInfo not implemented.\n";
 588 }