MachODumper.cpp revision 280031 
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
23using namespace llvm;
24using namespace object;
25
26namespace {
27
28class MachODumper : public ObjDumper {
29public:
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
41private:
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
59namespace llvm {
60
61std::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
74static 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
83static 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
97static 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
109static 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
132static 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
138static 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
153static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM64[] = {
154  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64_ALL),
155};
156
157static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesSPARC[] = {
158  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_SPARC_ALL),
159};
160
161static 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
177static 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
206static 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
231static 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
244static const EnumEntry<unsigned> MachOSymbolRefTypes[] = {
245  { "UndefinedNonLazy",                     0 },
246  { "ReferenceFlagUndefinedLazy",           1 },
247  { "ReferenceFlagDefined",                 2 },
248  { "ReferenceFlagPrivateDefined",          3 },
249  { "ReferenceFlagPrivateUndefinedNonLazy", 4 },
250  { "ReferenceFlagPrivateUndefinedLazy",    5 }
251};
252
253static const EnumEntry<unsigned> MachOSymbolFlags[] = {
254  { "ReferencedDynamically", 0x10 },
255  { "NoDeadStrip",           0x20 },
256  { "WeakRef",               0x40 },
257  { "WeakDef",               0x80 }
258};
259
260static const EnumEntry<unsigned> MachOSymbolTypes[] = {
261  { "Undef",           0x0 },
262  { "Abs",             0x2 },
263  { "Indirect",        0xA },
264  { "PreboundUndef",   0xC },
265  { "Section",         0xE }
266};
267
268namespace {
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
292static 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
321static 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
341void 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
351template<class MachHeader>
352void 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
385void MachODumper::printSections() {
386  return printSections(Obj);
387}
388
389void 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
454void 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
481void MachODumper::printRelocation(const RelocationRef &Reloc) {
482  return printRelocation(Obj, Reloc);
483}
484
485void 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
541void MachODumper::printSymbols() {
542  ListScope Group(W, "Symbols");
543
544  for (const SymbolRef &Symbol : Obj->symbols()) {
545    printSymbol(Symbol);
546  }
547}
548
549void MachODumper::printDynamicSymbols() {
550  ListScope Group(W, "DynamicSymbols");
551}
552
553void 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
586void MachODumper::printUnwindInfo() {
587  W.startLine() << "UnwindInfo not implemented.\n";
588}
589