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 "Error.h" 15 #include "ObjDumper.h" 16 #include "StackMapPrinter.h" 17 #include "llvm-readobj.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 #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: 31 MachODumper(const MachOObjectFile *Obj, ScopedPrinter &Writer) 32 : ObjDumper(Writer), 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 void printStackMap() const override; 41 42 // MachO-specific. 43 void printMachODataInCode() override; 44 void printMachOVersionMin() override; 45 void printMachODysymtab() override; 46 void printMachOSegment() override; 47 void printMachOIndirectSymbols() override; 48 void printMachOLinkerOptions () override; 49 50 private: 51 template<class MachHeader> 52 void printFileHeaders(const MachHeader &Header); 53 54 void printSymbol(const SymbolRef &Symbol); 55 56 void printRelocation(const RelocationRef &Reloc); 57 58 void printRelocation(const MachOObjectFile *Obj, const RelocationRef &Reloc); 59 60 void printSections(const MachOObjectFile *Obj); 61 62 const MachOObjectFile *Obj; 63 }; 64 65 } // namespace 66 67 68 namespace llvm { 69 70 std::error_code createMachODumper(const object::ObjectFile *Obj, 71 ScopedPrinter &Writer, 72 std::unique_ptr<ObjDumper> &Result) { 73 const MachOObjectFile *MachOObj = dyn_cast<MachOObjectFile>(Obj); 74 if (!MachOObj) 75 return readobj_error::unsupported_obj_file_format; 76 77 Result.reset(new MachODumper(MachOObj, Writer)); 78 return readobj_error::success; 79 } 80 81 } // namespace llvm 82 83 static const EnumEntry<uint32_t> MachOMagics[] = { 84 { "Magic", MachO::MH_MAGIC }, 85 { "Cigam", MachO::MH_CIGAM }, 86 { "Magic64", MachO::MH_MAGIC_64 }, 87 { "Cigam64", MachO::MH_CIGAM_64 }, 88 { "FatMagic", MachO::FAT_MAGIC }, 89 { "FatCigam", MachO::FAT_CIGAM }, 90 }; 91 92 static const EnumEntry<uint32_t> MachOHeaderFileTypes[] = { 93 { "Relocatable", MachO::MH_OBJECT }, 94 { "Executable", MachO::MH_EXECUTE }, 95 { "FixedVMLibrary", MachO::MH_FVMLIB }, 96 { "Core", MachO::MH_CORE }, 97 { "PreloadedExecutable", MachO::MH_PRELOAD }, 98 { "DynamicLibrary", MachO::MH_DYLIB }, 99 { "DynamicLinker", MachO::MH_DYLINKER }, 100 { "Bundle", MachO::MH_BUNDLE }, 101 { "DynamicLibraryStub", MachO::MH_DYLIB_STUB }, 102 { "DWARFSymbol", MachO::MH_DSYM }, 103 { "KextBundle", MachO::MH_KEXT_BUNDLE }, 104 }; 105 106 static const EnumEntry<uint32_t> MachOHeaderCpuTypes[] = { 107 { "Any" , static_cast<uint32_t>(MachO::CPU_TYPE_ANY) }, 108 { "X86" , MachO::CPU_TYPE_X86 }, 109 { "X86-64" , MachO::CPU_TYPE_X86_64 }, 110 { "Mc98000" , MachO::CPU_TYPE_MC98000 }, 111 { "Arm" , MachO::CPU_TYPE_ARM }, 112 { "Arm64" , MachO::CPU_TYPE_ARM64 }, 113 { "Sparc" , MachO::CPU_TYPE_SPARC }, 114 { "PowerPC" , MachO::CPU_TYPE_POWERPC }, 115 { "PowerPC64" , MachO::CPU_TYPE_POWERPC64 }, 116 }; 117 118 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX86[] = { 119 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_I386_ALL), 120 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_386), 121 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486), 122 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486SX), 123 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_586), 124 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTPRO), 125 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M3), 126 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M5), 127 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON), 128 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON_MOBILE), 129 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3), 130 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_M), 131 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_XEON), 132 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_M), 133 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4), 134 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4_M), 135 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM), 136 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM_2), 137 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON), 138 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON_MP), 139 }; 140 141 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX64[] = { 142 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_ALL), 143 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_ARCH1), 144 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_H), 145 }; 146 147 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM[] = { 148 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_ALL), 149 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V4T), 150 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6), 151 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5), 152 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5TEJ), 153 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_XSCALE), 154 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7), 155 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7S), 156 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7K), 157 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6M), 158 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7M), 159 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7EM), 160 }; 161 162 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM64[] = { 163 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64_ALL), 164 }; 165 166 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesSPARC[] = { 167 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_SPARC_ALL), 168 }; 169 170 static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesPPC[] = { 171 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_ALL), 172 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_601), 173 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_602), 174 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603), 175 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603e), 176 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603ev), 177 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604), 178 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604e), 179 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_620), 180 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_750), 181 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7400), 182 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7450), 183 LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_970), 184 }; 185 186 static const EnumEntry<uint32_t> MachOHeaderFlags[] = { 187 LLVM_READOBJ_ENUM_ENT(MachO, MH_NOUNDEFS), 188 LLVM_READOBJ_ENUM_ENT(MachO, MH_INCRLINK), 189 LLVM_READOBJ_ENUM_ENT(MachO, MH_DYLDLINK), 190 LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDATLOAD), 191 LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBOUND), 192 LLVM_READOBJ_ENUM_ENT(MachO, MH_SPLIT_SEGS), 193 LLVM_READOBJ_ENUM_ENT(MachO, MH_LAZY_INIT), 194 LLVM_READOBJ_ENUM_ENT(MachO, MH_TWOLEVEL), 195 LLVM_READOBJ_ENUM_ENT(MachO, MH_FORCE_FLAT), 196 LLVM_READOBJ_ENUM_ENT(MachO, MH_NOMULTIDEFS), 197 LLVM_READOBJ_ENUM_ENT(MachO, MH_NOFIXPREBINDING), 198 LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBINDABLE), 199 LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLMODSBOUND), 200 LLVM_READOBJ_ENUM_ENT(MachO, MH_SUBSECTIONS_VIA_SYMBOLS), 201 LLVM_READOBJ_ENUM_ENT(MachO, MH_CANONICAL), 202 LLVM_READOBJ_ENUM_ENT(MachO, MH_WEAK_DEFINES), 203 LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDS_TO_WEAK), 204 LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLOW_STACK_EXECUTION), 205 LLVM_READOBJ_ENUM_ENT(MachO, MH_ROOT_SAFE), 206 LLVM_READOBJ_ENUM_ENT(MachO, MH_SETUID_SAFE), 207 LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_REEXPORTED_DYLIBS), 208 LLVM_READOBJ_ENUM_ENT(MachO, MH_PIE), 209 LLVM_READOBJ_ENUM_ENT(MachO, MH_DEAD_STRIPPABLE_DYLIB), 210 LLVM_READOBJ_ENUM_ENT(MachO, MH_HAS_TLV_DESCRIPTORS), 211 LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_HEAP_EXECUTION), 212 LLVM_READOBJ_ENUM_ENT(MachO, MH_APP_EXTENSION_SAFE), 213 }; 214 215 static const EnumEntry<unsigned> MachOSectionAttributes[] = { 216 { "LocReloc" , 1 << 0 /*S_ATTR_LOC_RELOC */ }, 217 { "ExtReloc" , 1 << 1 /*S_ATTR_EXT_RELOC */ }, 218 { "SomeInstructions" , 1 << 2 /*S_ATTR_SOME_INSTRUCTIONS */ }, 219 { "Debug" , 1 << 17 /*S_ATTR_DEBUG */ }, 220 { "SelfModifyingCode", 1 << 18 /*S_ATTR_SELF_MODIFYING_CODE*/ }, 221 { "LiveSupport" , 1 << 19 /*S_ATTR_LIVE_SUPPORT */ }, 222 { "NoDeadStrip" , 1 << 20 /*S_ATTR_NO_DEAD_STRIP */ }, 223 { "StripStaticSyms" , 1 << 21 /*S_ATTR_STRIP_STATIC_SYMS */ }, 224 { "NoTOC" , 1 << 22 /*S_ATTR_NO_TOC */ }, 225 { "PureInstructions" , 1 << 23 /*S_ATTR_PURE_INSTRUCTIONS */ }, 226 }; 227 228 static const EnumEntry<unsigned> MachOSymbolRefTypes[] = { 229 { "UndefinedNonLazy", 0 }, 230 { "ReferenceFlagUndefinedLazy", 1 }, 231 { "ReferenceFlagDefined", 2 }, 232 { "ReferenceFlagPrivateDefined", 3 }, 233 { "ReferenceFlagPrivateUndefinedNonLazy", 4 }, 234 { "ReferenceFlagPrivateUndefinedLazy", 5 } 235 }; 236 237 static const EnumEntry<unsigned> MachOSymbolFlags[] = { 238 { "ReferencedDynamically", 0x10 }, 239 { "NoDeadStrip", 0x20 }, 240 { "WeakRef", 0x40 }, 241 { "WeakDef", 0x80 }, 242 { "AltEntry", 0x200 }, 243 }; 244 245 static const EnumEntry<unsigned> MachOSymbolTypes[] = { 246 { "Undef", 0x0 }, 247 { "Abs", 0x2 }, 248 { "Indirect", 0xA }, 249 { "PreboundUndef", 0xC }, 250 { "Section", 0xE } 251 }; 252 253 namespace { 254 struct MachOSection { 255 ArrayRef<char> Name; 256 ArrayRef<char> SegmentName; 257 uint64_t Address; 258 uint64_t Size; 259 uint32_t Offset; 260 uint32_t Alignment; 261 uint32_t RelocationTableOffset; 262 uint32_t NumRelocationTableEntries; 263 uint32_t Flags; 264 uint32_t Reserved1; 265 uint32_t Reserved2; 266 uint32_t Reserved3; 267 }; 268 269 struct MachOSegment { 270 std::string CmdName; 271 std::string SegName; 272 uint64_t cmdsize; 273 uint64_t vmaddr; 274 uint64_t vmsize; 275 uint64_t fileoff; 276 uint64_t filesize; 277 uint32_t maxprot; 278 uint32_t initprot; 279 uint32_t nsects; 280 uint32_t flags; 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 std::string getMask(uint32_t prot) 293 { 294 // TODO (davide): This always assumes prot is valid. 295 // Catch mistakes and report if needed. 296 std::string Prot; 297 Prot = ""; 298 Prot += (prot & MachO::VM_PROT_READ) ? "r" : "-"; 299 Prot += (prot & MachO::VM_PROT_WRITE) ? "w" : "-"; 300 Prot += (prot & MachO::VM_PROT_EXECUTE) ? "x" : "-"; 301 return Prot; 302 } 303 304 static void getSection(const MachOObjectFile *Obj, 305 DataRefImpl Sec, 306 MachOSection &Section) { 307 if (!Obj->is64Bit()) { 308 MachO::section Sect = Obj->getSection(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 return; 319 } 320 MachO::section_64 Sect = Obj->getSection64(Sec); 321 Section.Address = Sect.addr; 322 Section.Size = Sect.size; 323 Section.Offset = Sect.offset; 324 Section.Alignment = Sect.align; 325 Section.RelocationTableOffset = Sect.reloff; 326 Section.NumRelocationTableEntries = Sect.nreloc; 327 Section.Flags = Sect.flags; 328 Section.Reserved1 = Sect.reserved1; 329 Section.Reserved2 = Sect.reserved2; 330 Section.Reserved3 = Sect.reserved3; 331 } 332 333 static void getSegment(const MachOObjectFile *Obj, 334 const MachOObjectFile::LoadCommandInfo &L, 335 MachOSegment &Segment) { 336 if (!Obj->is64Bit()) { 337 MachO::segment_command SC = Obj->getSegmentLoadCommand(L); 338 Segment.CmdName = "LC_SEGMENT"; 339 Segment.SegName = SC.segname; 340 Segment.cmdsize = SC.cmdsize; 341 Segment.vmaddr = SC.vmaddr; 342 Segment.vmsize = SC.vmsize; 343 Segment.fileoff = SC.fileoff; 344 Segment.filesize = SC.filesize; 345 Segment.maxprot = SC.maxprot; 346 Segment.initprot = SC.initprot; 347 Segment.nsects = SC.nsects; 348 Segment.flags = SC.flags; 349 return; 350 } 351 MachO::segment_command_64 SC = Obj->getSegment64LoadCommand(L); 352 Segment.CmdName = "LC_SEGMENT_64"; 353 Segment.SegName = SC.segname; 354 Segment.cmdsize = SC.cmdsize; 355 Segment.vmaddr = SC.vmaddr; 356 Segment.vmsize = SC.vmsize; 357 Segment.fileoff = SC.fileoff; 358 Segment.filesize = SC.filesize; 359 Segment.maxprot = SC.maxprot; 360 Segment.initprot = SC.initprot; 361 Segment.nsects = SC.nsects; 362 Segment.flags = SC.flags; 363 } 364 365 static void getSymbol(const MachOObjectFile *Obj, 366 DataRefImpl DRI, 367 MachOSymbol &Symbol) { 368 if (!Obj->is64Bit()) { 369 MachO::nlist Entry = Obj->getSymbolTableEntry(DRI); 370 Symbol.StringIndex = Entry.n_strx; 371 Symbol.Type = Entry.n_type; 372 Symbol.SectionIndex = Entry.n_sect; 373 Symbol.Flags = Entry.n_desc; 374 Symbol.Value = Entry.n_value; 375 return; 376 } 377 MachO::nlist_64 Entry = Obj->getSymbol64TableEntry(DRI); 378 Symbol.StringIndex = Entry.n_strx; 379 Symbol.Type = Entry.n_type; 380 Symbol.SectionIndex = Entry.n_sect; 381 Symbol.Flags = Entry.n_desc; 382 Symbol.Value = Entry.n_value; 383 } 384 385 void MachODumper::printFileHeaders() { 386 DictScope H(W, "MachHeader"); 387 if (!Obj->is64Bit()) { 388 printFileHeaders(Obj->getHeader()); 389 } else { 390 printFileHeaders(Obj->getHeader64()); 391 W.printHex("Reserved", Obj->getHeader64().reserved); 392 } 393 } 394 395 template<class MachHeader> 396 void MachODumper::printFileHeaders(const MachHeader &Header) { 397 W.printEnum("Magic", Header.magic, makeArrayRef(MachOMagics)); 398 W.printEnum("CpuType", Header.cputype, makeArrayRef(MachOHeaderCpuTypes)); 399 uint32_t subtype = Header.cpusubtype & ~MachO::CPU_SUBTYPE_MASK; 400 switch (Header.cputype) { 401 case MachO::CPU_TYPE_X86: 402 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX86)); 403 break; 404 case MachO::CPU_TYPE_X86_64: 405 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX64)); 406 break; 407 case MachO::CPU_TYPE_ARM: 408 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM)); 409 break; 410 case MachO::CPU_TYPE_POWERPC: 411 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesPPC)); 412 break; 413 case MachO::CPU_TYPE_SPARC: 414 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesSPARC)); 415 break; 416 case MachO::CPU_TYPE_ARM64: 417 W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM64)); 418 break; 419 case MachO::CPU_TYPE_POWERPC64: 420 default: 421 W.printHex("CpuSubtype", subtype); 422 } 423 W.printEnum("FileType", Header.filetype, makeArrayRef(MachOHeaderFileTypes)); 424 W.printNumber("NumOfLoadCommands", Header.ncmds); 425 W.printNumber("SizeOfLoadCommands", Header.sizeofcmds); 426 W.printFlags("Flags", Header.flags, makeArrayRef(MachOHeaderFlags)); 427 } 428 429 void MachODumper::printSections() { 430 return printSections(Obj); 431 } 432 433 void MachODumper::printSections(const MachOObjectFile *Obj) { 434 ListScope Group(W, "Sections"); 435 436 int SectionIndex = -1; 437 for (const SectionRef &Section : Obj->sections()) { 438 ++SectionIndex; 439 440 MachOSection MOSection; 441 getSection(Obj, Section.getRawDataRefImpl(), MOSection); 442 DataRefImpl DR = Section.getRawDataRefImpl(); 443 444 StringRef Name; 445 error(Section.getName(Name)); 446 447 ArrayRef<char> RawName = Obj->getSectionRawName(DR); 448 StringRef SegmentName = Obj->getSectionFinalSegmentName(DR); 449 ArrayRef<char> RawSegmentName = Obj->getSectionRawFinalSegmentName(DR); 450 451 DictScope SectionD(W, "Section"); 452 W.printNumber("Index", SectionIndex); 453 W.printBinary("Name", Name, RawName); 454 W.printBinary("Segment", SegmentName, RawSegmentName); 455 W.printHex("Address", MOSection.Address); 456 W.printHex("Size", MOSection.Size); 457 W.printNumber("Offset", MOSection.Offset); 458 W.printNumber("Alignment", MOSection.Alignment); 459 W.printHex("RelocationOffset", MOSection.RelocationTableOffset); 460 W.printNumber("RelocationCount", MOSection.NumRelocationTableEntries); 461 W.printEnum("Type", MOSection.Flags & 0xFF, 462 makeArrayRef(MachOSectionAttributes)); 463 W.printFlags("Attributes", MOSection.Flags >> 8, 464 makeArrayRef(MachOSectionAttributes)); 465 W.printHex("Reserved1", MOSection.Reserved1); 466 W.printHex("Reserved2", MOSection.Reserved2); 467 if (Obj->is64Bit()) 468 W.printHex("Reserved3", MOSection.Reserved3); 469 470 if (opts::SectionRelocations) { 471 ListScope D(W, "Relocations"); 472 for (const RelocationRef &Reloc : Section.relocations()) 473 printRelocation(Reloc); 474 } 475 476 if (opts::SectionSymbols) { 477 ListScope D(W, "Symbols"); 478 for (const SymbolRef &Symbol : Obj->symbols()) { 479 if (!Section.containsSymbol(Symbol)) 480 continue; 481 482 printSymbol(Symbol); 483 } 484 } 485 486 if (opts::SectionData) { 487 bool IsBSS = Section.isBSS(); 488 if (!IsBSS) { 489 StringRef Data; 490 error(Section.getContents(Data)); 491 492 W.printBinaryBlock("SectionData", Data); 493 } 494 } 495 } 496 } 497 498 void MachODumper::printRelocations() { 499 ListScope D(W, "Relocations"); 500 501 std::error_code EC; 502 for (const SectionRef &Section : Obj->sections()) { 503 StringRef Name; 504 error(Section.getName(Name)); 505 506 bool PrintedGroup = false; 507 for (const RelocationRef &Reloc : Section.relocations()) { 508 if (!PrintedGroup) { 509 W.startLine() << "Section " << Name << " {\n"; 510 W.indent(); 511 PrintedGroup = true; 512 } 513 514 printRelocation(Reloc); 515 } 516 517 if (PrintedGroup) { 518 W.unindent(); 519 W.startLine() << "}\n"; 520 } 521 } 522 } 523 524 void MachODumper::printRelocation(const RelocationRef &Reloc) { 525 return printRelocation(Obj, Reloc); 526 } 527 528 void MachODumper::printRelocation(const MachOObjectFile *Obj, 529 const RelocationRef &Reloc) { 530 uint64_t Offset = Reloc.getOffset(); 531 SmallString<32> RelocName; 532 Reloc.getTypeName(RelocName); 533 534 DataRefImpl DR = Reloc.getRawDataRefImpl(); 535 MachO::any_relocation_info RE = Obj->getRelocation(DR); 536 bool IsScattered = Obj->isRelocationScattered(RE); 537 bool IsExtern = !IsScattered && Obj->getPlainRelocationExternal(RE); 538 539 StringRef TargetName; 540 if (IsExtern) { 541 symbol_iterator Symbol = Reloc.getSymbol(); 542 if (Symbol != Obj->symbol_end()) { 543 Expected<StringRef> TargetNameOrErr = Symbol->getName(); 544 if (!TargetNameOrErr) 545 error(errorToErrorCode(TargetNameOrErr.takeError())); 546 TargetName = *TargetNameOrErr; 547 } 548 } else if (!IsScattered) { 549 section_iterator SecI = Obj->getRelocationSection(DR); 550 if (SecI != Obj->section_end()) { 551 error(SecI->getName(TargetName)); 552 } 553 } 554 if (TargetName.empty()) 555 TargetName = "-"; 556 557 if (opts::ExpandRelocs) { 558 DictScope Group(W, "Relocation"); 559 W.printHex("Offset", Offset); 560 W.printNumber("PCRel", Obj->getAnyRelocationPCRel(RE)); 561 W.printNumber("Length", Obj->getAnyRelocationLength(RE)); 562 W.printNumber("Type", RelocName, Obj->getAnyRelocationType(RE)); 563 if (IsScattered) { 564 W.printHex("Value", Obj->getScatteredRelocationValue(RE)); 565 } else { 566 const char *Kind = IsExtern ? "Symbol" : "Section"; 567 W.printNumber(Kind, TargetName, Obj->getPlainRelocationSymbolNum(RE)); 568 } 569 } else { 570 SmallString<32> SymbolNameOrOffset("0x"); 571 if (IsScattered) { 572 // Scattered relocations don't really have an associated symbol for some 573 // reason, even if one exists in the symtab at the correct address. 574 SymbolNameOrOffset += utohexstr(Obj->getScatteredRelocationValue(RE)); 575 } else { 576 SymbolNameOrOffset = TargetName; 577 } 578 579 raw_ostream& OS = W.startLine(); 580 OS << W.hex(Offset) 581 << " " << Obj->getAnyRelocationPCRel(RE) 582 << " " << Obj->getAnyRelocationLength(RE); 583 if (IsScattered) 584 OS << " n/a"; 585 else 586 OS << " " << Obj->getPlainRelocationExternal(RE); 587 OS << " " << RelocName 588 << " " << IsScattered 589 << " " << SymbolNameOrOffset 590 << "\n"; 591 } 592 } 593 594 void MachODumper::printSymbols() { 595 ListScope Group(W, "Symbols"); 596 597 for (const SymbolRef &Symbol : Obj->symbols()) { 598 printSymbol(Symbol); 599 } 600 } 601 602 void MachODumper::printDynamicSymbols() { 603 ListScope Group(W, "DynamicSymbols"); 604 } 605 606 void MachODumper::printSymbol(const SymbolRef &Symbol) { 607 StringRef SymbolName; 608 Expected<StringRef> SymbolNameOrErr = Symbol.getName(); 609 if (!SymbolNameOrErr) { 610 // TODO: Actually report errors helpfully. 611 consumeError(SymbolNameOrErr.takeError()); 612 } else 613 SymbolName = *SymbolNameOrErr; 614 615 MachOSymbol MOSymbol; 616 getSymbol(Obj, Symbol.getRawDataRefImpl(), MOSymbol); 617 618 StringRef SectionName = ""; 619 Expected<section_iterator> SecIOrErr = Symbol.getSection(); 620 error(errorToErrorCode(SecIOrErr.takeError())); 621 section_iterator SecI = *SecIOrErr; 622 if (SecI != Obj->section_end()) 623 error(SecI->getName(SectionName)); 624 625 DictScope D(W, "Symbol"); 626 W.printNumber("Name", SymbolName, MOSymbol.StringIndex); 627 if (MOSymbol.Type & MachO::N_STAB) { 628 W.printHex("Type", "SymDebugTable", MOSymbol.Type); 629 } else { 630 if (MOSymbol.Type & MachO::N_PEXT) 631 W.startLine() << "PrivateExtern\n"; 632 if (MOSymbol.Type & MachO::N_EXT) 633 W.startLine() << "Extern\n"; 634 W.printEnum("Type", uint8_t(MOSymbol.Type & MachO::N_TYPE), 635 makeArrayRef(MachOSymbolTypes)); 636 } 637 W.printHex("Section", SectionName, MOSymbol.SectionIndex); 638 W.printEnum("RefType", static_cast<uint16_t>(MOSymbol.Flags & 0xF), 639 makeArrayRef(MachOSymbolRefTypes)); 640 W.printFlags("Flags", static_cast<uint16_t>(MOSymbol.Flags & ~0xF), 641 makeArrayRef(MachOSymbolFlags)); 642 W.printHex("Value", MOSymbol.Value); 643 } 644 645 void MachODumper::printUnwindInfo() { 646 W.startLine() << "UnwindInfo not implemented.\n"; 647 } 648 649 void MachODumper::printStackMap() const { 650 object::SectionRef StackMapSection; 651 for (auto Sec : Obj->sections()) { 652 StringRef Name; 653 Sec.getName(Name); 654 if (Name == "__llvm_stackmaps") { 655 StackMapSection = Sec; 656 break; 657 } 658 } 659 660 if (StackMapSection == object::SectionRef()) 661 return; 662 663 StringRef StackMapContents; 664 StackMapSection.getContents(StackMapContents); 665 ArrayRef<uint8_t> StackMapContentsArray( 666 reinterpret_cast<const uint8_t*>(StackMapContents.data()), 667 StackMapContents.size()); 668 669 if (Obj->isLittleEndian()) 670 prettyPrintStackMap( 671 llvm::outs(), 672 StackMapV1Parser<support::little>(StackMapContentsArray)); 673 else 674 prettyPrintStackMap(llvm::outs(), 675 StackMapV1Parser<support::big>(StackMapContentsArray)); 676 } 677 678 void MachODumper::printMachODataInCode() { 679 for (const auto &Load : Obj->load_commands()) { 680 if (Load.C.cmd == MachO::LC_DATA_IN_CODE) { 681 MachO::linkedit_data_command LLC = Obj->getLinkeditDataLoadCommand(Load); 682 DictScope Group(W, "DataInCode"); 683 W.printNumber("Data offset", LLC.dataoff); 684 W.printNumber("Data size", LLC.datasize); 685 ListScope D(W, "Data entries"); 686 unsigned NumRegions = LLC.datasize / sizeof(MachO::data_in_code_entry); 687 for (unsigned i = 0; i < NumRegions; ++i) { 688 MachO::data_in_code_entry DICE = Obj->getDataInCodeTableEntry( 689 LLC.dataoff, i); 690 DictScope Group(W, "Entry"); 691 W.printNumber("Index", i); 692 W.printNumber("Offset", DICE.offset); 693 W.printNumber("Length", DICE.length); 694 W.printNumber("Kind", DICE.kind); 695 } 696 } 697 } 698 } 699 700 void MachODumper::printMachOVersionMin() { 701 for (const auto &Load : Obj->load_commands()) { 702 StringRef Cmd; 703 switch (Load.C.cmd) { 704 case MachO::LC_VERSION_MIN_MACOSX: 705 Cmd = "LC_VERSION_MIN_MACOSX"; 706 break; 707 case MachO::LC_VERSION_MIN_IPHONEOS: 708 Cmd = "LC_VERSION_MIN_IPHONEOS"; 709 break; 710 case MachO::LC_VERSION_MIN_TVOS: 711 Cmd = "LC_VERSION_MIN_TVOS"; 712 break; 713 case MachO::LC_VERSION_MIN_WATCHOS: 714 Cmd = "LC_VERSION_MIN_WATCHOS"; 715 break; 716 default: 717 continue; 718 } 719 720 MachO::version_min_command VMC = Obj->getVersionMinLoadCommand(Load); 721 DictScope Group(W, "MinVersion"); 722 W.printString("Cmd", Cmd); 723 W.printNumber("Size", VMC.cmdsize); 724 SmallString<32> Version; 725 Version = utostr(MachOObjectFile::getVersionMinMajor(VMC, false)) + "." + 726 utostr(MachOObjectFile::getVersionMinMinor(VMC, false)); 727 uint32_t Update = MachOObjectFile::getVersionMinUpdate(VMC, false); 728 if (Update != 0) 729 Version += "." + utostr(MachOObjectFile::getVersionMinUpdate(VMC, false)); 730 W.printString("Version", Version); 731 SmallString<32> SDK; 732 if (VMC.sdk == 0) 733 SDK = "n/a"; 734 else { 735 SDK = utostr(MachOObjectFile::getVersionMinMajor(VMC, true)) + "." + 736 utostr(MachOObjectFile::getVersionMinMinor(VMC, true)); 737 uint32_t Update = MachOObjectFile::getVersionMinUpdate(VMC, true); 738 if (Update != 0) 739 SDK += "." + utostr(MachOObjectFile::getVersionMinUpdate(VMC, true)); 740 } 741 W.printString("SDK", SDK); 742 } 743 } 744 745 void MachODumper::printMachODysymtab() { 746 for (const auto &Load : Obj->load_commands()) { 747 if (Load.C.cmd == MachO::LC_DYSYMTAB) { 748 MachO::dysymtab_command DLC = Obj->getDysymtabLoadCommand(); 749 DictScope Group(W, "Dysymtab"); 750 W.printNumber("ilocalsym", DLC.ilocalsym); 751 W.printNumber("nlocalsym", DLC.nlocalsym); 752 W.printNumber("iextdefsym", DLC.iextdefsym); 753 W.printNumber("nextdefsym", DLC.nextdefsym); 754 W.printNumber("iundefsym", DLC.iundefsym); 755 W.printNumber("nundefsym", DLC.nundefsym); 756 W.printNumber("tocoff", DLC.tocoff); 757 W.printNumber("ntoc", DLC.ntoc); 758 W.printNumber("modtaboff", DLC.modtaboff); 759 W.printNumber("nmodtab", DLC.nmodtab); 760 W.printNumber("extrefsymoff", DLC.extrefsymoff); 761 W.printNumber("nextrefsyms", DLC.nextrefsyms); 762 W.printNumber("indirectsymoff", DLC.indirectsymoff); 763 W.printNumber("nindirectsyms", DLC.nindirectsyms); 764 W.printNumber("extreloff", DLC.extreloff); 765 W.printNumber("nextrel", DLC.nextrel); 766 W.printNumber("locreloff", DLC.locreloff); 767 W.printNumber("nlocrel", DLC.nlocrel); 768 } 769 } 770 } 771 772 void MachODumper::printMachOSegment() { 773 for (const auto &Load : Obj->load_commands()) { 774 if (Load.C.cmd == MachO::LC_SEGMENT || Load.C.cmd == MachO::LC_SEGMENT_64) { 775 MachOSegment MOSegment; 776 getSegment(Obj, Load, MOSegment); 777 DictScope Group(W, "Segment"); 778 W.printString("Cmd", MOSegment.CmdName); 779 W.printString("Name", MOSegment.SegName); 780 W.printNumber("Size", MOSegment.cmdsize); 781 W.printHex("vmaddr", MOSegment.vmaddr); 782 W.printHex("vmsize", MOSegment.vmsize); 783 W.printNumber("fileoff", MOSegment.fileoff); 784 W.printNumber("filesize", MOSegment.filesize); 785 W.printString("maxprot", getMask(MOSegment.maxprot)); 786 W.printString("initprot", getMask(MOSegment.initprot)); 787 W.printNumber("nsects", MOSegment.nsects); 788 W.printHex("flags", MOSegment.flags); 789 } 790 } 791 } 792 793 void MachODumper::printMachOIndirectSymbols() { 794 for (const auto &Load : Obj->load_commands()) { 795 if (Load.C.cmd == MachO::LC_DYSYMTAB) { 796 MachO::dysymtab_command DLC = Obj->getDysymtabLoadCommand(); 797 DictScope Group(W, "Indirect Symbols"); 798 W.printNumber("Number", DLC.nindirectsyms); 799 ListScope D(W, "Symbols"); 800 for (unsigned i = 0; i < DLC.nindirectsyms; ++i) { 801 DictScope Group(W, "Entry"); 802 W.printNumber("Entry Index", i); 803 W.printHex("Symbol Index", Obj->getIndirectSymbolTableEntry(DLC, i)); 804 } 805 } 806 } 807 } 808 809 void MachODumper::printMachOLinkerOptions() { 810 for (const auto &Load : Obj->load_commands()) { 811 if (Load.C.cmd == MachO::LC_LINKER_OPTION) { 812 MachO::linker_option_command LOLC = Obj->getLinkerOptionLoadCommand(Load); 813 DictScope Group(W, "Linker Options"); 814 W.printNumber("Size", LOLC.cmdsize); 815 ListScope D(W, "Strings"); 816 uint64_t DataSize = LOLC.cmdsize - sizeof(MachO::linker_option_command); 817 const char *P = Load.Ptr + sizeof(MachO::linker_option_command); 818 StringRef Data(P, DataSize); 819 for (unsigned i = 0; i < LOLC.count; ++i) { 820 std::pair<StringRef,StringRef> Split = Data.split('\0'); 821 W.printString("Value", Split.first); 822 Data = Split.second; 823 } 824 } 825 } 826 } 827
