1 //===- MachODumper.cpp - Object file dumping utility for llvm -------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the MachO-specific dumper for llvm-readobj.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "ObjDumper.h"
14 #include "StackMapPrinter.h"
15 #include "llvm-readobj.h"
16 #include "llvm/ADT/Optional.h"
17 #include "llvm/ADT/SmallString.h"
18 #include "llvm/ADT/StringExtras.h"
19 #include "llvm/Object/MachO.h"
20 #include "llvm/Support/BinaryStreamReader.h"
21 #include "llvm/Support/Casting.h"
22 #include "llvm/Support/ScopedPrinter.h"
23 
24 using namespace llvm;
25 using namespace object;
26 
27 namespace {
28 
29 class MachODumper : public ObjDumper {
30 public:
MachODumper(const MachOObjectFile * Obj,ScopedPrinter & Writer)31   MachODumper(const MachOObjectFile *Obj, ScopedPrinter &Writer)
32       : ObjDumper(Writer, Obj->getFileName()), Obj(Obj) {}
33 
34   void printFileHeaders() override;
35   void printSectionHeaders() override;
36   void printRelocations() override;
37   void printUnwindInfo() override;
38   void printStackMap() const override;
39   void printCGProfile() override;
40 
41   void printNeededLibraries() override;
42 
canCompareSymbols() const43   bool canCompareSymbols() const override { return true; }
44   bool compareSymbolsByName(object::SymbolRef LHS,
45                             object::SymbolRef RHS) const override;
46   bool compareSymbolsByType(object::SymbolRef LHS,
47                             object::SymbolRef RHS) const override;
48   // MachO-specific.
49   void printMachODataInCode() override;
50   void printMachOVersionMin() override;
51   void printMachODysymtab() override;
52   void printMachOSegment() override;
53   void printMachOIndirectSymbols() override;
54   void printMachOLinkerOptions () override;
55 
56 private:
57   template<class MachHeader>
58   void printFileHeaders(const MachHeader &Header);
59 
60   StringRef getSymbolName(const SymbolRef &Symbol) const;
61   uint8_t getSymbolType(const SymbolRef &Symbol) const;
62 
63   void printSymbols() override;
64   void printSymbols(Optional<SymbolComparator> SymComp) override;
65   void printDynamicSymbols() override;
66   void printDynamicSymbols(Optional<SymbolComparator> SymComp) override;
67   void printSymbol(const SymbolRef &Symbol, ScopedPrinter &W);
68   void printSymbol(const SymbolRef &Symbol);
69 
70   void printRelocation(const RelocationRef &Reloc);
71 
72   void printRelocation(const MachOObjectFile *Obj, const RelocationRef &Reloc);
73 
74   void printSectionHeaders(const MachOObjectFile *Obj);
75 
76   const MachOObjectFile *Obj;
77 };
78 
79 } // namespace
80 
81 
82 namespace llvm {
83 
createMachODumper(const object::MachOObjectFile & Obj,ScopedPrinter & Writer)84 std::unique_ptr<ObjDumper> createMachODumper(const object::MachOObjectFile &Obj,
85                                              ScopedPrinter &Writer) {
86   return std::make_unique<MachODumper>(&Obj, Writer);
87 }
88 
89 } // namespace llvm
90 
91 const EnumEntry<uint32_t> MachOMagics[] = {
92   { "Magic",      MachO::MH_MAGIC    },
93   { "Cigam",      MachO::MH_CIGAM    },
94   { "Magic64",    MachO::MH_MAGIC_64 },
95   { "Cigam64",    MachO::MH_CIGAM_64 },
96   { "FatMagic",   MachO::FAT_MAGIC   },
97   { "FatCigam",   MachO::FAT_CIGAM   },
98 };
99 
100 const EnumEntry<uint32_t> MachOHeaderFileTypes[] = {
101   { "Relocatable",          MachO::MH_OBJECT      },
102   { "Executable",           MachO::MH_EXECUTE     },
103   { "FixedVMLibrary",       MachO::MH_FVMLIB      },
104   { "Core",                 MachO::MH_CORE        },
105   { "PreloadedExecutable",  MachO::MH_PRELOAD     },
106   { "DynamicLibrary",       MachO::MH_DYLIB       },
107   { "DynamicLinker",        MachO::MH_DYLINKER    },
108   { "Bundle",               MachO::MH_BUNDLE      },
109   { "DynamicLibraryStub",   MachO::MH_DYLIB_STUB  },
110   { "DWARFSymbol",          MachO::MH_DSYM        },
111   { "KextBundle",           MachO::MH_KEXT_BUNDLE },
112 };
113 
114 const EnumEntry<uint32_t> MachOHeaderCpuTypes[] = {
115   { "Any"       , static_cast<uint32_t>(MachO::CPU_TYPE_ANY) },
116   { "X86"       , MachO::CPU_TYPE_X86       },
117   { "X86-64"    , MachO::CPU_TYPE_X86_64    },
118   { "Mc98000"   , MachO::CPU_TYPE_MC98000   },
119   { "Arm"       , MachO::CPU_TYPE_ARM       },
120   { "Arm64"     , MachO::CPU_TYPE_ARM64     },
121   { "Sparc"     , MachO::CPU_TYPE_SPARC     },
122   { "PowerPC"   , MachO::CPU_TYPE_POWERPC   },
123   { "PowerPC64" , MachO::CPU_TYPE_POWERPC64 },
124 };
125 
126 const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX86[] = {
127   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_I386_ALL),
128   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_386),
129   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486),
130   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486SX),
131   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_586),
132   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTPRO),
133   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M3),
134   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M5),
135   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON),
136   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON_MOBILE),
137   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3),
138   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_M),
139   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_XEON),
140   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_M),
141   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4),
142   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4_M),
143   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM),
144   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM_2),
145   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON),
146   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON_MP),
147 };
148 
149 const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX64[] = {
150   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_ALL),
151   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_ARCH1),
152   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_H),
153 };
154 
155 const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM[] = {
156   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_ALL),
157   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V4T),
158   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6),
159   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5),
160   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5TEJ),
161   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_XSCALE),
162   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7),
163   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7S),
164   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7K),
165   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6M),
166   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7M),
167   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7EM),
168 };
169 
170 const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM64[] = {
171     LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64_ALL),
172     LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64_V8),
173     LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64E),
174 };
175 
176 const EnumEntry<uint32_t> MachOHeaderCpuSubtypesSPARC[] = {
177   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_SPARC_ALL),
178 };
179 
180 const EnumEntry<uint32_t> MachOHeaderCpuSubtypesPPC[] = {
181   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_ALL),
182   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_601),
183   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_602),
184   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603),
185   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603e),
186   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603ev),
187   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604),
188   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604e),
189   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_620),
190   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_750),
191   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7400),
192   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7450),
193   LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_970),
194 };
195 
196 const EnumEntry<uint32_t> MachOHeaderFlags[] = {
197   LLVM_READOBJ_ENUM_ENT(MachO, MH_NOUNDEFS),
198   LLVM_READOBJ_ENUM_ENT(MachO, MH_INCRLINK),
199   LLVM_READOBJ_ENUM_ENT(MachO, MH_DYLDLINK),
200   LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDATLOAD),
201   LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBOUND),
202   LLVM_READOBJ_ENUM_ENT(MachO, MH_SPLIT_SEGS),
203   LLVM_READOBJ_ENUM_ENT(MachO, MH_LAZY_INIT),
204   LLVM_READOBJ_ENUM_ENT(MachO, MH_TWOLEVEL),
205   LLVM_READOBJ_ENUM_ENT(MachO, MH_FORCE_FLAT),
206   LLVM_READOBJ_ENUM_ENT(MachO, MH_NOMULTIDEFS),
207   LLVM_READOBJ_ENUM_ENT(MachO, MH_NOFIXPREBINDING),
208   LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBINDABLE),
209   LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLMODSBOUND),
210   LLVM_READOBJ_ENUM_ENT(MachO, MH_SUBSECTIONS_VIA_SYMBOLS),
211   LLVM_READOBJ_ENUM_ENT(MachO, MH_CANONICAL),
212   LLVM_READOBJ_ENUM_ENT(MachO, MH_WEAK_DEFINES),
213   LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDS_TO_WEAK),
214   LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLOW_STACK_EXECUTION),
215   LLVM_READOBJ_ENUM_ENT(MachO, MH_ROOT_SAFE),
216   LLVM_READOBJ_ENUM_ENT(MachO, MH_SETUID_SAFE),
217   LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_REEXPORTED_DYLIBS),
218   LLVM_READOBJ_ENUM_ENT(MachO, MH_PIE),
219   LLVM_READOBJ_ENUM_ENT(MachO, MH_DEAD_STRIPPABLE_DYLIB),
220   LLVM_READOBJ_ENUM_ENT(MachO, MH_HAS_TLV_DESCRIPTORS),
221   LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_HEAP_EXECUTION),
222   LLVM_READOBJ_ENUM_ENT(MachO, MH_APP_EXTENSION_SAFE),
223 };
224 
225 const EnumEntry<unsigned> MachOSectionTypes[] = {
226   { "Regular"                        , MachO::S_REGULAR },
227   { "ZeroFill"                       , MachO::S_ZEROFILL },
228   { "CStringLiterals"                , MachO::S_CSTRING_LITERALS },
229   { "4ByteLiterals"                  , MachO::S_4BYTE_LITERALS },
230   { "8ByteLiterals"                  , MachO::S_8BYTE_LITERALS },
231   { "LiteralPointers"                , MachO::S_LITERAL_POINTERS },
232   { "NonLazySymbolPointers"          , MachO::S_NON_LAZY_SYMBOL_POINTERS },
233   { "LazySymbolPointers"             , MachO::S_LAZY_SYMBOL_POINTERS },
234   { "SymbolStubs"                    , MachO::S_SYMBOL_STUBS },
235   { "ModInitFuncPointers"            , MachO::S_MOD_INIT_FUNC_POINTERS },
236   { "ModTermFuncPointers"            , MachO::S_MOD_TERM_FUNC_POINTERS },
237   { "Coalesced"                      , MachO::S_COALESCED },
238   { "GBZeroFill"                     , MachO::S_GB_ZEROFILL },
239   { "Interposing"                    , MachO::S_INTERPOSING },
240   { "16ByteLiterals"                 , MachO::S_16BYTE_LITERALS },
241   { "DTraceDOF"                      , MachO::S_DTRACE_DOF },
242   { "LazyDylibSymbolPointers"        , MachO::S_LAZY_DYLIB_SYMBOL_POINTERS },
243   { "ThreadLocalRegular"             , MachO::S_THREAD_LOCAL_REGULAR },
244   { "ThreadLocalZerofill"            , MachO::S_THREAD_LOCAL_ZEROFILL },
245   { "ThreadLocalVariables"           , MachO::S_THREAD_LOCAL_VARIABLES },
246   { "ThreadLocalVariablePointers"    , MachO::S_THREAD_LOCAL_VARIABLE_POINTERS },
247   { "ThreadLocalInitFunctionPointers", MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS }
248 };
249 
250 const EnumEntry<unsigned> MachOSectionAttributes[] = {
251   { "LocReloc"         , 1 <<  0 /*S_ATTR_LOC_RELOC          */ },
252   { "ExtReloc"         , 1 <<  1 /*S_ATTR_EXT_RELOC          */ },
253   { "SomeInstructions" , 1 <<  2 /*S_ATTR_SOME_INSTRUCTIONS  */ },
254   { "Debug"            , 1 << 17 /*S_ATTR_DEBUG              */ },
255   { "SelfModifyingCode", 1 << 18 /*S_ATTR_SELF_MODIFYING_CODE*/ },
256   { "LiveSupport"      , 1 << 19 /*S_ATTR_LIVE_SUPPORT       */ },
257   { "NoDeadStrip"      , 1 << 20 /*S_ATTR_NO_DEAD_STRIP      */ },
258   { "StripStaticSyms"  , 1 << 21 /*S_ATTR_STRIP_STATIC_SYMS  */ },
259   { "NoTOC"            , 1 << 22 /*S_ATTR_NO_TOC             */ },
260   { "PureInstructions" , 1 << 23 /*S_ATTR_PURE_INSTRUCTIONS  */ },
261 };
262 
263 const EnumEntry<unsigned> MachOSymbolRefTypes[] = {
264   { "UndefinedNonLazy",                     0 },
265   { "ReferenceFlagUndefinedLazy",           1 },
266   { "ReferenceFlagDefined",                 2 },
267   { "ReferenceFlagPrivateDefined",          3 },
268   { "ReferenceFlagPrivateUndefinedNonLazy", 4 },
269   { "ReferenceFlagPrivateUndefinedLazy",    5 }
270 };
271 
272 const EnumEntry<unsigned> MachOSymbolFlags[] = {
273   { "ThumbDef",               0x8 },
274   { "ReferencedDynamically", 0x10 },
275   { "NoDeadStrip",           0x20 },
276   { "WeakRef",               0x40 },
277   { "WeakDef",               0x80 },
278   { "SymbolResolver",       0x100 },
279   { "AltEntry",             0x200 },
280   { "ColdFunc",             0x400 },
281 };
282 
283 const EnumEntry<unsigned> MachOSymbolTypes[] = {
284   { "Undef",           0x0 },
285   { "Abs",             0x2 },
286   { "Indirect",        0xA },
287   { "PreboundUndef",   0xC },
288   { "Section",         0xE }
289 };
290 
291 namespace {
292   struct MachOSection {
293     ArrayRef<char> Name;
294     ArrayRef<char> SegmentName;
295     uint64_t Address;
296     uint64_t Size;
297     uint32_t Offset;
298     uint32_t Alignment;
299     uint32_t RelocationTableOffset;
300     uint32_t NumRelocationTableEntries;
301     uint32_t Flags;
302     uint32_t Reserved1;
303     uint32_t Reserved2;
304     uint32_t Reserved3;
305   };
306 
307   struct MachOSegment {
308     std::string CmdName;
309     std::string SegName;
310     uint64_t cmdsize;
311     uint64_t vmaddr;
312     uint64_t vmsize;
313     uint64_t fileoff;
314     uint64_t filesize;
315     uint32_t maxprot;
316     uint32_t initprot;
317     uint32_t nsects;
318     uint32_t flags;
319   };
320 
321   struct MachOSymbol {
322     uint32_t StringIndex;
323     uint8_t Type;
324     uint8_t SectionIndex;
325     uint16_t Flags;
326     uint64_t Value;
327   };
328 }
329 
getMask(uint32_t prot)330 static std::string getMask(uint32_t prot)
331 {
332   // TODO (davide): This always assumes prot is valid.
333   // Catch mistakes and report if needed.
334   std::string Prot;
335   Prot = "";
336   Prot += (prot & MachO::VM_PROT_READ) ? "r" : "-";
337   Prot += (prot & MachO::VM_PROT_WRITE) ? "w" : "-";
338   Prot += (prot & MachO::VM_PROT_EXECUTE) ? "x" : "-";
339   return Prot;
340 }
341 
getSection(const MachOObjectFile * Obj,DataRefImpl Sec,MachOSection & Section)342 static void getSection(const MachOObjectFile *Obj,
343                        DataRefImpl Sec,
344                        MachOSection &Section) {
345   if (!Obj->is64Bit()) {
346     MachO::section Sect = Obj->getSection(Sec);
347     Section.Address     = Sect.addr;
348     Section.Size        = Sect.size;
349     Section.Offset      = Sect.offset;
350     Section.Alignment   = Sect.align;
351     Section.RelocationTableOffset = Sect.reloff;
352     Section.NumRelocationTableEntries = Sect.nreloc;
353     Section.Flags       = Sect.flags;
354     Section.Reserved1   = Sect.reserved1;
355     Section.Reserved2   = Sect.reserved2;
356     return;
357   }
358   MachO::section_64 Sect = Obj->getSection64(Sec);
359   Section.Address     = Sect.addr;
360   Section.Size        = Sect.size;
361   Section.Offset      = Sect.offset;
362   Section.Alignment   = Sect.align;
363   Section.RelocationTableOffset = Sect.reloff;
364   Section.NumRelocationTableEntries = Sect.nreloc;
365   Section.Flags       = Sect.flags;
366   Section.Reserved1   = Sect.reserved1;
367   Section.Reserved2   = Sect.reserved2;
368   Section.Reserved3   = Sect.reserved3;
369 }
370 
getSegment(const MachOObjectFile * Obj,const MachOObjectFile::LoadCommandInfo & L,MachOSegment & Segment)371 static void getSegment(const MachOObjectFile *Obj,
372                        const MachOObjectFile::LoadCommandInfo &L,
373                        MachOSegment &Segment) {
374   if (!Obj->is64Bit()) {
375     MachO::segment_command SC = Obj->getSegmentLoadCommand(L);
376     Segment.CmdName = "LC_SEGMENT";
377     Segment.SegName = SC.segname;
378     Segment.cmdsize = SC.cmdsize;
379     Segment.vmaddr = SC.vmaddr;
380     Segment.vmsize = SC.vmsize;
381     Segment.fileoff = SC.fileoff;
382     Segment.filesize = SC.filesize;
383     Segment.maxprot = SC.maxprot;
384     Segment.initprot = SC.initprot;
385     Segment.nsects = SC.nsects;
386     Segment.flags = SC.flags;
387     return;
388   }
389   MachO::segment_command_64 SC = Obj->getSegment64LoadCommand(L);
390   Segment.CmdName = "LC_SEGMENT_64";
391   Segment.SegName = SC.segname;
392   Segment.cmdsize = SC.cmdsize;
393   Segment.vmaddr = SC.vmaddr;
394   Segment.vmsize = SC.vmsize;
395   Segment.fileoff = SC.fileoff;
396   Segment.filesize = SC.filesize;
397   Segment.maxprot = SC.maxprot;
398   Segment.initprot = SC.initprot;
399   Segment.nsects = SC.nsects;
400   Segment.flags = SC.flags;
401 }
402 
getSymbol(const MachOObjectFile * Obj,DataRefImpl DRI,MachOSymbol & Symbol)403 static void getSymbol(const MachOObjectFile *Obj,
404                       DataRefImpl DRI,
405                       MachOSymbol &Symbol) {
406   if (!Obj->is64Bit()) {
407     MachO::nlist Entry = Obj->getSymbolTableEntry(DRI);
408     Symbol.StringIndex  = Entry.n_strx;
409     Symbol.Type         = Entry.n_type;
410     Symbol.SectionIndex = Entry.n_sect;
411     Symbol.Flags        = Entry.n_desc;
412     Symbol.Value        = Entry.n_value;
413     return;
414   }
415   MachO::nlist_64 Entry = Obj->getSymbol64TableEntry(DRI);
416   Symbol.StringIndex  = Entry.n_strx;
417   Symbol.Type         = Entry.n_type;
418   Symbol.SectionIndex = Entry.n_sect;
419   Symbol.Flags        = Entry.n_desc;
420   Symbol.Value        = Entry.n_value;
421 }
422 
printFileHeaders()423 void MachODumper::printFileHeaders() {
424   DictScope H(W, "MachHeader");
425   if (!Obj->is64Bit()) {
426     printFileHeaders(Obj->getHeader());
427   } else {
428     printFileHeaders(Obj->getHeader64());
429     W.printHex("Reserved", Obj->getHeader64().reserved);
430   }
431 }
432 
433 template<class MachHeader>
printFileHeaders(const MachHeader & Header)434 void MachODumper::printFileHeaders(const MachHeader &Header) {
435   W.printEnum("Magic", Header.magic, makeArrayRef(MachOMagics));
436   W.printEnum("CpuType", Header.cputype, makeArrayRef(MachOHeaderCpuTypes));
437   uint32_t subtype = Header.cpusubtype & ~MachO::CPU_SUBTYPE_MASK;
438   switch (Header.cputype) {
439   case MachO::CPU_TYPE_X86:
440     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX86));
441     break;
442   case MachO::CPU_TYPE_X86_64:
443     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX64));
444     break;
445   case MachO::CPU_TYPE_ARM:
446     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM));
447     break;
448   case MachO::CPU_TYPE_POWERPC:
449     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesPPC));
450     break;
451   case MachO::CPU_TYPE_SPARC:
452     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesSPARC));
453     break;
454   case MachO::CPU_TYPE_ARM64:
455     W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM64));
456     break;
457   case MachO::CPU_TYPE_POWERPC64:
458   default:
459     W.printHex("CpuSubtype", subtype);
460   }
461   W.printEnum("FileType", Header.filetype, makeArrayRef(MachOHeaderFileTypes));
462   W.printNumber("NumOfLoadCommands", Header.ncmds);
463   W.printNumber("SizeOfLoadCommands", Header.sizeofcmds);
464   W.printFlags("Flags", Header.flags, makeArrayRef(MachOHeaderFlags));
465 }
466 
printSectionHeaders()467 void MachODumper::printSectionHeaders() { return printSectionHeaders(Obj); }
468 
printSectionHeaders(const MachOObjectFile * Obj)469 void MachODumper::printSectionHeaders(const MachOObjectFile *Obj) {
470   ListScope Group(W, "Sections");
471 
472   int SectionIndex = -1;
473   for (const SectionRef &Section : Obj->sections()) {
474     ++SectionIndex;
475 
476     MachOSection MOSection;
477     getSection(Obj, Section.getRawDataRefImpl(), MOSection);
478     DataRefImpl DR = Section.getRawDataRefImpl();
479     StringRef Name = unwrapOrError(Obj->getFileName(), Section.getName());
480     ArrayRef<char> RawName = Obj->getSectionRawName(DR);
481     StringRef SegmentName = Obj->getSectionFinalSegmentName(DR);
482     ArrayRef<char> RawSegmentName = Obj->getSectionRawFinalSegmentName(DR);
483 
484     DictScope SectionD(W, "Section");
485     W.printNumber("Index", SectionIndex);
486     W.printBinary("Name", Name, RawName);
487     W.printBinary("Segment", SegmentName, RawSegmentName);
488     W.printHex("Address", MOSection.Address);
489     W.printHex("Size", MOSection.Size);
490     W.printNumber("Offset", MOSection.Offset);
491     W.printNumber("Alignment", MOSection.Alignment);
492     W.printHex("RelocationOffset", MOSection.RelocationTableOffset);
493     W.printNumber("RelocationCount", MOSection.NumRelocationTableEntries);
494     W.printEnum("Type", MOSection.Flags & 0xFF,
495                 makeArrayRef(MachOSectionTypes));
496     W.printFlags("Attributes", MOSection.Flags >> 8,
497                  makeArrayRef(MachOSectionAttributes));
498     W.printHex("Reserved1", MOSection.Reserved1);
499     W.printHex("Reserved2", MOSection.Reserved2);
500     if (Obj->is64Bit())
501       W.printHex("Reserved3", MOSection.Reserved3);
502 
503     if (opts::SectionRelocations) {
504       ListScope D(W, "Relocations");
505       for (const RelocationRef &Reloc : Section.relocations())
506         printRelocation(Reloc);
507     }
508 
509     if (opts::SectionSymbols) {
510       ListScope D(W, "Symbols");
511       for (const SymbolRef &Symbol : Obj->symbols()) {
512         if (!Section.containsSymbol(Symbol))
513           continue;
514 
515         printSymbol(Symbol);
516       }
517     }
518 
519     if (opts::SectionData && !Section.isBSS())
520       W.printBinaryBlock("SectionData", unwrapOrError(Obj->getFileName(),
521                                                       Section.getContents()));
522   }
523 }
524 
printRelocations()525 void MachODumper::printRelocations() {
526   ListScope D(W, "Relocations");
527 
528   std::error_code EC;
529   for (const SectionRef &Section : Obj->sections()) {
530     StringRef Name = unwrapOrError(Obj->getFileName(), Section.getName());
531     bool PrintedGroup = false;
532     for (const RelocationRef &Reloc : Section.relocations()) {
533       if (!PrintedGroup) {
534         W.startLine() << "Section " << Name << " {\n";
535         W.indent();
536         PrintedGroup = true;
537       }
538 
539       printRelocation(Reloc);
540     }
541 
542     if (PrintedGroup) {
543       W.unindent();
544       W.startLine() << "}\n";
545     }
546   }
547 }
548 
printRelocation(const RelocationRef & Reloc)549 void MachODumper::printRelocation(const RelocationRef &Reloc) {
550   return printRelocation(Obj, Reloc);
551 }
552 
printRelocation(const MachOObjectFile * Obj,const RelocationRef & Reloc)553 void MachODumper::printRelocation(const MachOObjectFile *Obj,
554                                   const RelocationRef &Reloc) {
555   uint64_t Offset = Reloc.getOffset();
556   SmallString<32> RelocName;
557   Reloc.getTypeName(RelocName);
558 
559   DataRefImpl DR = Reloc.getRawDataRefImpl();
560   MachO::any_relocation_info RE = Obj->getRelocation(DR);
561   bool IsScattered = Obj->isRelocationScattered(RE);
562   bool IsExtern = !IsScattered && Obj->getPlainRelocationExternal(RE);
563 
564   StringRef TargetName;
565   if (IsExtern) {
566     symbol_iterator Symbol = Reloc.getSymbol();
567     if (Symbol != Obj->symbol_end()) {
568       TargetName = getSymbolName(*Symbol);
569     }
570   } else if (!IsScattered) {
571     section_iterator SecI = Obj->getRelocationSection(DR);
572     if (SecI != Obj->section_end())
573       TargetName = unwrapOrError(Obj->getFileName(), SecI->getName());
574   }
575   if (TargetName.empty())
576     TargetName = "-";
577 
578   if (opts::ExpandRelocs) {
579     DictScope Group(W, "Relocation");
580     W.printHex("Offset", Offset);
581     W.printNumber("PCRel", Obj->getAnyRelocationPCRel(RE));
582     W.printNumber("Length", Obj->getAnyRelocationLength(RE));
583     W.printNumber("Type", RelocName, Obj->getAnyRelocationType(RE));
584     if (IsScattered) {
585       W.printHex("Value", Obj->getScatteredRelocationValue(RE));
586     } else {
587       const char *Kind = IsExtern ? "Symbol" : "Section";
588       W.printNumber(Kind, TargetName, Obj->getPlainRelocationSymbolNum(RE));
589     }
590   } else {
591     SmallString<32> SymbolNameOrOffset("0x");
592     if (IsScattered) {
593       // Scattered relocations don't really have an associated symbol for some
594       // reason, even if one exists in the symtab at the correct address.
595       SymbolNameOrOffset += utohexstr(Obj->getScatteredRelocationValue(RE));
596     } else {
597       SymbolNameOrOffset = TargetName;
598     }
599 
600     raw_ostream& OS = W.startLine();
601     OS << W.hex(Offset)
602        << " " << Obj->getAnyRelocationPCRel(RE)
603        << " " << Obj->getAnyRelocationLength(RE);
604     if (IsScattered)
605       OS << " n/a";
606     else
607       OS << " " << Obj->getPlainRelocationExternal(RE);
608     OS << " " << RelocName
609        << " " << IsScattered
610        << " " << SymbolNameOrOffset
611        << "\n";
612   }
613 }
614 
getSymbolName(const SymbolRef & Symbol) const615 StringRef MachODumper::getSymbolName(const SymbolRef &Symbol) const {
616   Expected<StringRef> SymbolNameOrErr = Symbol.getName();
617   if (!SymbolNameOrErr) {
618     reportError(SymbolNameOrErr.takeError(), Obj->getFileName());
619   }
620   return *SymbolNameOrErr;
621 }
622 
getSymbolType(const SymbolRef & Symbol) const623 uint8_t MachODumper::getSymbolType(const SymbolRef &Symbol) const {
624   return Obj->is64Bit()
625       ? Obj->getSymbol64TableEntry(Symbol.getRawDataRefImpl()).n_type
626       : Obj->getSymbolTableEntry(Symbol.getRawDataRefImpl()).n_type;
627 }
628 
compareSymbolsByName(SymbolRef LHS,SymbolRef RHS) const629 bool MachODumper::compareSymbolsByName(SymbolRef LHS, SymbolRef RHS) const {
630   return getSymbolName(LHS).str().compare(getSymbolName(RHS).str()) < 0;
631 }
632 
compareSymbolsByType(SymbolRef LHS,SymbolRef RHS) const633 bool MachODumper::compareSymbolsByType(SymbolRef LHS, SymbolRef RHS) const {
634   return getSymbolType(LHS) < getSymbolType(RHS);
635 }
636 
printSymbols()637 void MachODumper::printSymbols() { printSymbols(None); }
638 
printSymbols(Optional<SymbolComparator> SymComp)639 void MachODumper::printSymbols(Optional<SymbolComparator> SymComp) {
640   ListScope Group(W, "Symbols");
641   if (SymComp) {
642     auto SymbolRange = Obj->symbols();
643     std::vector<SymbolRef> SortedSymbols(SymbolRange.begin(),
644                                          SymbolRange.end());
645     llvm::stable_sort(SortedSymbols, *SymComp);
646     for (SymbolRef Symbol : SortedSymbols)
647       printSymbol(Symbol);
648   } else {
649     for (const SymbolRef &Symbol : Obj->symbols()) {
650       printSymbol(Symbol);
651     }
652   }
653 }
654 
printDynamicSymbols()655 void MachODumper::printDynamicSymbols() {
656   ListScope Group(W, "DynamicSymbols");
657 }
printDynamicSymbols(Optional<SymbolComparator> SymComp)658 void MachODumper::printDynamicSymbols(Optional<SymbolComparator> SymComp) {
659   ListScope Group(W, "DynamicSymbols");
660 }
661 
printSymbol(const SymbolRef & Symbol)662 void MachODumper::printSymbol(const SymbolRef &Symbol) {
663   printSymbol(Symbol, W);
664 }
665 
printSymbol(const SymbolRef & Symbol,ScopedPrinter & W)666 void MachODumper::printSymbol(const SymbolRef &Symbol, ScopedPrinter &W) {
667   StringRef SymbolName = getSymbolName(Symbol);
668 
669   MachOSymbol MOSymbol;
670   getSymbol(Obj, Symbol.getRawDataRefImpl(), MOSymbol);
671 
672   StringRef SectionName = "";
673   // Don't ask a Mach-O STABS symbol for its section unless we know that
674   // STAB symbol's section field refers to a valid section index. Otherwise
675   // the symbol may error trying to load a section that does not exist.
676   // TODO: Add a whitelist of STABS symbol types that contain valid section
677   // indices.
678   if (!(MOSymbol.Type & MachO::N_STAB)) {
679     Expected<section_iterator> SecIOrErr = Symbol.getSection();
680     if (!SecIOrErr)
681       reportError(SecIOrErr.takeError(), Obj->getFileName());
682 
683     section_iterator SecI = *SecIOrErr;
684     if (SecI != Obj->section_end())
685       SectionName = unwrapOrError(Obj->getFileName(), SecI->getName());
686   }
687 
688   DictScope D(W, "Symbol");
689   W.printNumber("Name", SymbolName, MOSymbol.StringIndex);
690   if (MOSymbol.Type & MachO::N_STAB) {
691     W.printHex("Type", "SymDebugTable", MOSymbol.Type);
692   } else {
693     if (MOSymbol.Type & MachO::N_PEXT)
694       W.startLine() << "PrivateExtern\n";
695     if (MOSymbol.Type & MachO::N_EXT)
696       W.startLine() << "Extern\n";
697     W.printEnum("Type", uint8_t(MOSymbol.Type & MachO::N_TYPE),
698                 makeArrayRef(MachOSymbolTypes));
699   }
700   W.printHex("Section", SectionName, MOSymbol.SectionIndex);
701   W.printEnum("RefType", static_cast<uint16_t>(MOSymbol.Flags & 0x7),
702               makeArrayRef(MachOSymbolRefTypes));
703   W.printFlags("Flags", static_cast<uint16_t>(MOSymbol.Flags & ~0x7),
704                makeArrayRef(MachOSymbolFlags));
705   W.printHex("Value", MOSymbol.Value);
706 }
707 
printUnwindInfo()708 void MachODumper::printUnwindInfo() {
709   W.startLine() << "UnwindInfo not implemented.\n";
710 }
711 
printStackMap() const712 void MachODumper::printStackMap() const {
713   object::SectionRef StackMapSection;
714   for (auto Sec : Obj->sections()) {
715     StringRef Name;
716     if (Expected<StringRef> NameOrErr = Sec.getName())
717       Name = *NameOrErr;
718     else
719       consumeError(NameOrErr.takeError());
720 
721     if (Name == "__llvm_stackmaps") {
722       StackMapSection = Sec;
723       break;
724     }
725   }
726 
727   if (StackMapSection == object::SectionRef())
728     return;
729 
730   StringRef StackMapContents =
731       unwrapOrError(Obj->getFileName(), StackMapSection.getContents());
732   ArrayRef<uint8_t> StackMapContentsArray =
733       arrayRefFromStringRef(StackMapContents);
734 
735   if (Obj->isLittleEndian())
736     prettyPrintStackMap(
737         W, StackMapParser<support::little>(StackMapContentsArray));
738   else
739     prettyPrintStackMap(
740         W, StackMapParser<support::big>(StackMapContentsArray));
741 }
742 
printCGProfile()743 void MachODumper::printCGProfile() {
744   object::SectionRef CGProfileSection;
745   for (auto Sec : Obj->sections()) {
746     StringRef Name;
747     if (Expected<StringRef> NameOrErr = Sec.getName())
748       Name = *NameOrErr;
749     else
750       consumeError(NameOrErr.takeError());
751 
752     if (Name == "__cg_profile") {
753       CGProfileSection = Sec;
754       break;
755     }
756   }
757   if (CGProfileSection == object::SectionRef())
758     return;
759 
760   StringRef CGProfileContents =
761       unwrapOrError(Obj->getFileName(), CGProfileSection.getContents());
762   BinaryStreamReader Reader(CGProfileContents, Obj->isLittleEndian()
763                                                    ? llvm::support::little
764                                                    : llvm::support::big);
765 
766   ListScope L(W, "CGProfile");
767   while (!Reader.empty()) {
768     uint32_t FromIndex, ToIndex;
769     uint64_t Count;
770     if (Error Err = Reader.readInteger(FromIndex))
771       reportError(std::move(Err), Obj->getFileName());
772     if (Error Err = Reader.readInteger(ToIndex))
773       reportError(std::move(Err), Obj->getFileName());
774     if (Error Err = Reader.readInteger(Count))
775       reportError(std::move(Err), Obj->getFileName());
776     DictScope D(W, "CGProfileEntry");
777     W.printNumber("From", getSymbolName(*Obj->getSymbolByIndex(FromIndex)),
778                   FromIndex);
779     W.printNumber("To", getSymbolName(*Obj->getSymbolByIndex(ToIndex)),
780                   ToIndex);
781     W.printNumber("Weight", Count);
782   }
783 }
784 
printNeededLibraries()785 void MachODumper::printNeededLibraries() {
786   ListScope D(W, "NeededLibraries");
787 
788   using LibsTy = std::vector<StringRef>;
789   LibsTy Libs;
790 
791   for (const auto &Command : Obj->load_commands()) {
792     if (Command.C.cmd == MachO::LC_LOAD_DYLIB ||
793         Command.C.cmd == MachO::LC_ID_DYLIB ||
794         Command.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||
795         Command.C.cmd == MachO::LC_REEXPORT_DYLIB ||
796         Command.C.cmd == MachO::LC_LAZY_LOAD_DYLIB ||
797         Command.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
798       MachO::dylib_command Dl = Obj->getDylibIDLoadCommand(Command);
799       if (Dl.dylib.name < Dl.cmdsize) {
800         auto *P = static_cast<const char*>(Command.Ptr) + Dl.dylib.name;
801         Libs.push_back(P);
802       }
803     }
804   }
805 
806   llvm::stable_sort(Libs);
807 
808   for (const auto &L : Libs) {
809     W.startLine() << L << "\n";
810   }
811 }
812 
printMachODataInCode()813 void MachODumper::printMachODataInCode() {
814   for (const auto &Load : Obj->load_commands()) {
815     if (Load.C.cmd  == MachO::LC_DATA_IN_CODE) {
816       MachO::linkedit_data_command LLC = Obj->getLinkeditDataLoadCommand(Load);
817       DictScope Group(W, "DataInCode");
818       W.printNumber("Data offset", LLC.dataoff);
819       W.printNumber("Data size", LLC.datasize);
820       ListScope D(W, "Data entries");
821       unsigned NumRegions = LLC.datasize / sizeof(MachO::data_in_code_entry);
822       for (unsigned i = 0; i < NumRegions; ++i) {
823         MachO::data_in_code_entry DICE = Obj->getDataInCodeTableEntry(
824                                                               LLC.dataoff, i);
825         DictScope Group(W, "Entry");
826         W.printNumber("Index", i);
827         W.printNumber("Offset", DICE.offset);
828         W.printNumber("Length", DICE.length);
829         W.printNumber("Kind", DICE.kind);
830       }
831     }
832   }
833 }
834 
printMachOVersionMin()835 void MachODumper::printMachOVersionMin() {
836   for (const auto &Load : Obj->load_commands()) {
837     StringRef Cmd;
838     switch (Load.C.cmd) {
839     case MachO::LC_VERSION_MIN_MACOSX:
840       Cmd = "LC_VERSION_MIN_MACOSX";
841       break;
842     case MachO::LC_VERSION_MIN_IPHONEOS:
843       Cmd = "LC_VERSION_MIN_IPHONEOS";
844       break;
845     case MachO::LC_VERSION_MIN_TVOS:
846       Cmd = "LC_VERSION_MIN_TVOS";
847       break;
848     case MachO::LC_VERSION_MIN_WATCHOS:
849       Cmd = "LC_VERSION_MIN_WATCHOS";
850       break;
851     case MachO::LC_BUILD_VERSION:
852       Cmd = "LC_BUILD_VERSION";
853       break;
854     default:
855       continue;
856     }
857 
858     DictScope Group(W, "MinVersion");
859     // Handle LC_BUILD_VERSION.
860     if (Load.C.cmd == MachO::LC_BUILD_VERSION) {
861       MachO::build_version_command BVC = Obj->getBuildVersionLoadCommand(Load);
862       W.printString("Cmd", Cmd);
863       W.printNumber("Size", BVC.cmdsize);
864       W.printString("Platform",
865                     MachOObjectFile::getBuildPlatform(BVC.platform));
866       W.printString("Version", MachOObjectFile::getVersionString(BVC.minos));
867       if (BVC.sdk)
868         W.printString("SDK", MachOObjectFile::getVersionString(BVC.sdk));
869       else
870         W.printString("SDK", StringRef("n/a"));
871       continue;
872     }
873 
874     MachO::version_min_command VMC = Obj->getVersionMinLoadCommand(Load);
875     W.printString("Cmd", Cmd);
876     W.printNumber("Size", VMC.cmdsize);
877     SmallString<32> Version;
878     Version = utostr(MachOObjectFile::getVersionMinMajor(VMC, false)) + "." +
879               utostr(MachOObjectFile::getVersionMinMinor(VMC, false));
880     uint32_t Update = MachOObjectFile::getVersionMinUpdate(VMC, false);
881     if (Update != 0)
882       Version += "." + utostr(MachOObjectFile::getVersionMinUpdate(VMC, false));
883     W.printString("Version", Version);
884     SmallString<32> SDK;
885     if (VMC.sdk == 0)
886       SDK = "n/a";
887     else {
888       SDK = utostr(MachOObjectFile::getVersionMinMajor(VMC, true)) + "." +
889             utostr(MachOObjectFile::getVersionMinMinor(VMC, true));
890       uint32_t Update = MachOObjectFile::getVersionMinUpdate(VMC, true);
891       if (Update != 0)
892         SDK += "." + utostr(MachOObjectFile::getVersionMinUpdate(VMC, true));
893     }
894     W.printString("SDK", SDK);
895   }
896 }
897 
printMachODysymtab()898 void MachODumper::printMachODysymtab() {
899   for (const auto &Load : Obj->load_commands()) {
900     if (Load.C.cmd == MachO::LC_DYSYMTAB) {
901       MachO::dysymtab_command DLC = Obj->getDysymtabLoadCommand();
902       DictScope Group(W, "Dysymtab");
903       W.printNumber("ilocalsym", DLC.ilocalsym);
904       W.printNumber("nlocalsym", DLC.nlocalsym);
905       W.printNumber("iextdefsym", DLC.iextdefsym);
906       W.printNumber("nextdefsym", DLC.nextdefsym);
907       W.printNumber("iundefsym", DLC.iundefsym);
908       W.printNumber("nundefsym", DLC.nundefsym);
909       W.printNumber("tocoff", DLC.tocoff);
910       W.printNumber("ntoc", DLC.ntoc);
911       W.printNumber("modtaboff", DLC.modtaboff);
912       W.printNumber("nmodtab", DLC.nmodtab);
913       W.printNumber("extrefsymoff", DLC.extrefsymoff);
914       W.printNumber("nextrefsyms", DLC.nextrefsyms);
915       W.printNumber("indirectsymoff", DLC.indirectsymoff);
916       W.printNumber("nindirectsyms", DLC.nindirectsyms);
917       W.printNumber("extreloff", DLC.extreloff);
918       W.printNumber("nextrel", DLC.nextrel);
919       W.printNumber("locreloff", DLC.locreloff);
920       W.printNumber("nlocrel", DLC.nlocrel);
921     }
922   }
923 }
924 
printMachOSegment()925 void MachODumper::printMachOSegment() {
926   for (const auto &Load : Obj->load_commands()) {
927     if (Load.C.cmd == MachO::LC_SEGMENT || Load.C.cmd == MachO::LC_SEGMENT_64) {
928       MachOSegment MOSegment;
929       getSegment(Obj, Load, MOSegment);
930       DictScope Group(W, "Segment");
931       W.printString("Cmd", MOSegment.CmdName);
932       W.printString("Name", MOSegment.SegName);
933       W.printNumber("Size", MOSegment.cmdsize);
934       W.printHex("vmaddr", MOSegment.vmaddr);
935       W.printHex("vmsize", MOSegment.vmsize);
936       W.printNumber("fileoff", MOSegment.fileoff);
937       W.printNumber("filesize", MOSegment.filesize);
938       W.printString("maxprot", getMask(MOSegment.maxprot));
939       W.printString("initprot", getMask(MOSegment.initprot));
940       W.printNumber("nsects", MOSegment.nsects);
941       W.printHex("flags", MOSegment.flags);
942     }
943   }
944 }
945 
printMachOIndirectSymbols()946 void MachODumper::printMachOIndirectSymbols() {
947   for (const auto &Load : Obj->load_commands()) {
948     if (Load.C.cmd == MachO::LC_DYSYMTAB) {
949       MachO::dysymtab_command DLC = Obj->getDysymtabLoadCommand();
950       DictScope Group(W, "Indirect Symbols");
951       W.printNumber("Number", DLC.nindirectsyms);
952       ListScope D(W, "Symbols");
953       for (unsigned i = 0; i < DLC.nindirectsyms; ++i) {
954         DictScope Group(W, "Entry");
955         W.printNumber("Entry Index", i);
956         W.printHex("Symbol Index", Obj->getIndirectSymbolTableEntry(DLC, i));
957       }
958     }
959   }
960 }
961 
printMachOLinkerOptions()962 void MachODumper::printMachOLinkerOptions() {
963   for (const auto &Load : Obj->load_commands()) {
964     if (Load.C.cmd == MachO::LC_LINKER_OPTION) {
965       MachO::linker_option_command LOLC = Obj->getLinkerOptionLoadCommand(Load);
966       DictScope Group(W, "Linker Options");
967       W.printNumber("Size", LOLC.cmdsize);
968       ListScope D(W, "Strings");
969       uint64_t DataSize = LOLC.cmdsize - sizeof(MachO::linker_option_command);
970       const char *P = Load.Ptr + sizeof(MachO::linker_option_command);
971       StringRef Data(P, DataSize);
972       for (unsigned i = 0; i < LOLC.count; ++i) {
973         std::pair<StringRef,StringRef> Split = Data.split('\0');
974         W.printString("Value", Split.first);
975         Data = Split.second;
976       }
977     }
978   }
979 }
980