MachODump.cpp revision 37ed9c199ca639565f6ce88105f9e39e898d82d0
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-objdump. 11// 12//===----------------------------------------------------------------------===// 13 14#include "llvm-objdump.h" 15#include "llvm-c/Disassembler.h" 16#include "llvm/ADT/STLExtras.h" 17#include "llvm/ADT/StringExtras.h" 18#include "llvm/ADT/Triple.h" 19#include "llvm/Config/config.h" 20#include "llvm/DebugInfo/DIContext.h" 21#include "llvm/MC/MCAsmInfo.h" 22#include "llvm/MC/MCContext.h" 23#include "llvm/MC/MCDisassembler.h" 24#include "llvm/MC/MCInst.h" 25#include "llvm/MC/MCInstPrinter.h" 26#include "llvm/MC/MCInstrDesc.h" 27#include "llvm/MC/MCInstrInfo.h" 28#include "llvm/MC/MCRegisterInfo.h" 29#include "llvm/MC/MCSubtargetInfo.h" 30#include "llvm/Object/MachO.h" 31#include "llvm/Support/Casting.h" 32#include "llvm/Support/CommandLine.h" 33#include "llvm/Support/Debug.h" 34#include "llvm/Support/Endian.h" 35#include "llvm/Support/Format.h" 36#include "llvm/Support/GraphWriter.h" 37#include "llvm/Support/MachO.h" 38#include "llvm/Support/MemoryBuffer.h" 39#include "llvm/Support/FormattedStream.h" 40#include "llvm/Support/TargetRegistry.h" 41#include "llvm/Support/TargetSelect.h" 42#include "llvm/Support/raw_ostream.h" 43#include <algorithm> 44#include <cstring> 45#include <system_error> 46 47#if HAVE_CXXABI_H 48#include <cxxabi.h> 49#endif 50 51using namespace llvm; 52using namespace object; 53 54static cl::opt<bool> 55 UseDbg("g", 56 cl::desc("Print line information from debug info if available")); 57 58static cl::opt<std::string> DSYMFile("dsym", 59 cl::desc("Use .dSYM file for debug info")); 60 61static cl::opt<bool> FullLeadingAddr("full-leading-addr", 62 cl::desc("Print full leading address")); 63 64static cl::opt<bool> 65 PrintImmHex("print-imm-hex", 66 cl::desc("Use hex format for immediate values")); 67 68static std::string ThumbTripleName; 69 70static const Target *GetTarget(const MachOObjectFile *MachOObj, 71 const char **McpuDefault, 72 const Target **ThumbTarget) { 73 // Figure out the target triple. 74 if (TripleName.empty()) { 75 llvm::Triple TT("unknown-unknown-unknown"); 76 llvm::Triple ThumbTriple = Triple(); 77 TT = MachOObj->getArch(McpuDefault, &ThumbTriple); 78 TripleName = TT.str(); 79 ThumbTripleName = ThumbTriple.str(); 80 } 81 82 // Get the target specific parser. 83 std::string Error; 84 const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error); 85 if (TheTarget && ThumbTripleName.empty()) 86 return TheTarget; 87 88 *ThumbTarget = TargetRegistry::lookupTarget(ThumbTripleName, Error); 89 if (*ThumbTarget) 90 return TheTarget; 91 92 errs() << "llvm-objdump: error: unable to get target for '"; 93 if (!TheTarget) 94 errs() << TripleName; 95 else 96 errs() << ThumbTripleName; 97 errs() << "', see --version and --triple.\n"; 98 return nullptr; 99} 100 101struct SymbolSorter { 102 bool operator()(const SymbolRef &A, const SymbolRef &B) { 103 SymbolRef::Type AType, BType; 104 A.getType(AType); 105 B.getType(BType); 106 107 uint64_t AAddr, BAddr; 108 if (AType != SymbolRef::ST_Function) 109 AAddr = 0; 110 else 111 A.getAddress(AAddr); 112 if (BType != SymbolRef::ST_Function) 113 BAddr = 0; 114 else 115 B.getAddress(BAddr); 116 return AAddr < BAddr; 117 } 118}; 119 120// Types for the storted data in code table that is built before disassembly 121// and the predicate function to sort them. 122typedef std::pair<uint64_t, DiceRef> DiceTableEntry; 123typedef std::vector<DiceTableEntry> DiceTable; 124typedef DiceTable::iterator dice_table_iterator; 125 126// This is used to search for a data in code table entry for the PC being 127// disassembled. The j parameter has the PC in j.first. A single data in code 128// table entry can cover many bytes for each of its Kind's. So if the offset, 129// aka the i.first value, of the data in code table entry plus its Length 130// covers the PC being searched for this will return true. If not it will 131// return false. 132static bool compareDiceTableEntries(const DiceTableEntry &i, 133 const DiceTableEntry &j) { 134 uint16_t Length; 135 i.second.getLength(Length); 136 137 return j.first >= i.first && j.first < i.first + Length; 138} 139 140static uint64_t DumpDataInCode(const char *bytes, uint64_t Length, 141 unsigned short Kind) { 142 uint32_t Value, Size = 1; 143 144 switch (Kind) { 145 default: 146 case MachO::DICE_KIND_DATA: 147 if (Length >= 4) { 148 if (!NoShowRawInsn) 149 DumpBytes(StringRef(bytes, 4)); 150 Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0]; 151 outs() << "\t.long " << Value; 152 Size = 4; 153 } else if (Length >= 2) { 154 if (!NoShowRawInsn) 155 DumpBytes(StringRef(bytes, 2)); 156 Value = bytes[1] << 8 | bytes[0]; 157 outs() << "\t.short " << Value; 158 Size = 2; 159 } else { 160 if (!NoShowRawInsn) 161 DumpBytes(StringRef(bytes, 2)); 162 Value = bytes[0]; 163 outs() << "\t.byte " << Value; 164 Size = 1; 165 } 166 if (Kind == MachO::DICE_KIND_DATA) 167 outs() << "\t@ KIND_DATA\n"; 168 else 169 outs() << "\t@ data in code kind = " << Kind << "\n"; 170 break; 171 case MachO::DICE_KIND_JUMP_TABLE8: 172 if (!NoShowRawInsn) 173 DumpBytes(StringRef(bytes, 1)); 174 Value = bytes[0]; 175 outs() << "\t.byte " << format("%3u", Value) << "\t@ KIND_JUMP_TABLE8\n"; 176 Size = 1; 177 break; 178 case MachO::DICE_KIND_JUMP_TABLE16: 179 if (!NoShowRawInsn) 180 DumpBytes(StringRef(bytes, 2)); 181 Value = bytes[1] << 8 | bytes[0]; 182 outs() << "\t.short " << format("%5u", Value & 0xffff) 183 << "\t@ KIND_JUMP_TABLE16\n"; 184 Size = 2; 185 break; 186 case MachO::DICE_KIND_JUMP_TABLE32: 187 case MachO::DICE_KIND_ABS_JUMP_TABLE32: 188 if (!NoShowRawInsn) 189 DumpBytes(StringRef(bytes, 4)); 190 Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0]; 191 outs() << "\t.long " << Value; 192 if (Kind == MachO::DICE_KIND_JUMP_TABLE32) 193 outs() << "\t@ KIND_JUMP_TABLE32\n"; 194 else 195 outs() << "\t@ KIND_ABS_JUMP_TABLE32\n"; 196 Size = 4; 197 break; 198 } 199 return Size; 200} 201 202static void getSectionsAndSymbols(const MachO::mach_header Header, 203 MachOObjectFile *MachOObj, 204 std::vector<SectionRef> &Sections, 205 std::vector<SymbolRef> &Symbols, 206 SmallVectorImpl<uint64_t> &FoundFns, 207 uint64_t &BaseSegmentAddress) { 208 for (const SymbolRef &Symbol : MachOObj->symbols()) 209 Symbols.push_back(Symbol); 210 211 for (const SectionRef &Section : MachOObj->sections()) { 212 StringRef SectName; 213 Section.getName(SectName); 214 Sections.push_back(Section); 215 } 216 217 MachOObjectFile::LoadCommandInfo Command = 218 MachOObj->getFirstLoadCommandInfo(); 219 bool BaseSegmentAddressSet = false; 220 for (unsigned i = 0;; ++i) { 221 if (Command.C.cmd == MachO::LC_FUNCTION_STARTS) { 222 // We found a function starts segment, parse the addresses for later 223 // consumption. 224 MachO::linkedit_data_command LLC = 225 MachOObj->getLinkeditDataLoadCommand(Command); 226 227 MachOObj->ReadULEB128s(LLC.dataoff, FoundFns); 228 } else if (Command.C.cmd == MachO::LC_SEGMENT) { 229 MachO::segment_command SLC = MachOObj->getSegmentLoadCommand(Command); 230 StringRef SegName = SLC.segname; 231 if (!BaseSegmentAddressSet && SegName != "__PAGEZERO") { 232 BaseSegmentAddressSet = true; 233 BaseSegmentAddress = SLC.vmaddr; 234 } 235 } 236 237 if (i == Header.ncmds - 1) 238 break; 239 else 240 Command = MachOObj->getNextLoadCommandInfo(Command); 241 } 242} 243 244static void DisassembleInputMachO2(StringRef Filename, 245 MachOObjectFile *MachOOF); 246 247void llvm::DisassembleInputMachO(StringRef Filename) { 248 ErrorOr<std::unique_ptr<MemoryBuffer>> BuffOrErr = 249 MemoryBuffer::getFileOrSTDIN(Filename); 250 if (std::error_code EC = BuffOrErr.getError()) { 251 errs() << "llvm-objdump: " << Filename << ": " << EC.message() << "\n"; 252 return; 253 } 254 std::unique_ptr<MemoryBuffer> Buff = std::move(BuffOrErr.get()); 255 256 std::unique_ptr<MachOObjectFile> MachOOF = std::move( 257 ObjectFile::createMachOObjectFile(Buff.get()->getMemBufferRef()).get()); 258 259 DisassembleInputMachO2(Filename, MachOOF.get()); 260} 261 262typedef DenseMap<uint64_t, StringRef> SymbolAddressMap; 263typedef std::pair<uint64_t, const char *> BindInfoEntry; 264typedef std::vector<BindInfoEntry> BindTable; 265typedef BindTable::iterator bind_table_iterator; 266 267// The block of info used by the Symbolizer call backs. 268struct DisassembleInfo { 269 bool verbose; 270 MachOObjectFile *O; 271 SectionRef S; 272 SymbolAddressMap *AddrMap; 273 std::vector<SectionRef> *Sections; 274 const char *class_name; 275 const char *selector_name; 276 char *method; 277 char *demangled_name; 278 uint64_t adrp_addr; 279 uint32_t adrp_inst; 280 BindTable *bindtable; 281}; 282 283// GuessSymbolName is passed the address of what might be a symbol and a 284// pointer to the DisassembleInfo struct. It returns the name of a symbol 285// with that address or nullptr if no symbol is found with that address. 286static const char *GuessSymbolName(uint64_t value, 287 struct DisassembleInfo *info) { 288 const char *SymbolName = nullptr; 289 // A DenseMap can't lookup up some values. 290 if (value != 0xffffffffffffffffULL && value != 0xfffffffffffffffeULL) { 291 StringRef name = info->AddrMap->lookup(value); 292 if (!name.empty()) 293 SymbolName = name.data(); 294 } 295 return SymbolName; 296} 297 298// SymbolizerGetOpInfo() is the operand information call back function. 299// This is called to get the symbolic information for operand(s) of an 300// instruction when it is being done. This routine does this from 301// the relocation information, symbol table, etc. That block of information 302// is a pointer to the struct DisassembleInfo that was passed when the 303// disassembler context was created and passed to back to here when 304// called back by the disassembler for instruction operands that could have 305// relocation information. The address of the instruction containing operand is 306// at the Pc parameter. The immediate value the operand has is passed in 307// op_info->Value and is at Offset past the start of the instruction and has a 308// byte Size of 1, 2 or 4. The symbolc information is returned in TagBuf is the 309// LLVMOpInfo1 struct defined in the header "llvm-c/Disassembler.h" as symbol 310// names and addends of the symbolic expression to add for the operand. The 311// value of TagType is currently 1 (for the LLVMOpInfo1 struct). If symbolic 312// information is returned then this function returns 1 else it returns 0. 313int SymbolizerGetOpInfo(void *DisInfo, uint64_t Pc, uint64_t Offset, 314 uint64_t Size, int TagType, void *TagBuf) { 315 struct DisassembleInfo *info = (struct DisassembleInfo *)DisInfo; 316 struct LLVMOpInfo1 *op_info = (struct LLVMOpInfo1 *)TagBuf; 317 uint64_t value = op_info->Value; 318 319 // Make sure all fields returned are zero if we don't set them. 320 memset((void *)op_info, '\0', sizeof(struct LLVMOpInfo1)); 321 op_info->Value = value; 322 323 // If the TagType is not the value 1 which it code knows about or if no 324 // verbose symbolic information is wanted then just return 0, indicating no 325 // information is being returned. 326 if (TagType != 1 || info->verbose == false) 327 return 0; 328 329 unsigned int Arch = info->O->getArch(); 330 if (Arch == Triple::x86) { 331 if (Size != 1 && Size != 2 && Size != 4 && Size != 0) 332 return 0; 333 // First search the section's relocation entries (if any) for an entry 334 // for this section offset. 335 uint32_t sect_addr = info->S.getAddress(); 336 uint32_t sect_offset = (Pc + Offset) - sect_addr; 337 bool reloc_found = false; 338 DataRefImpl Rel; 339 MachO::any_relocation_info RE; 340 bool isExtern = false; 341 SymbolRef Symbol; 342 bool r_scattered = false; 343 uint32_t r_value, pair_r_value, r_type; 344 for (const RelocationRef &Reloc : info->S.relocations()) { 345 uint64_t RelocOffset; 346 Reloc.getOffset(RelocOffset); 347 if (RelocOffset == sect_offset) { 348 Rel = Reloc.getRawDataRefImpl(); 349 RE = info->O->getRelocation(Rel); 350 r_type = info->O->getAnyRelocationType(RE); 351 r_scattered = info->O->isRelocationScattered(RE); 352 if (r_scattered) { 353 r_value = info->O->getScatteredRelocationValue(RE); 354 if (r_type == MachO::GENERIC_RELOC_SECTDIFF || 355 r_type == MachO::GENERIC_RELOC_LOCAL_SECTDIFF) { 356 DataRefImpl RelNext = Rel; 357 info->O->moveRelocationNext(RelNext); 358 MachO::any_relocation_info RENext; 359 RENext = info->O->getRelocation(RelNext); 360 if (info->O->isRelocationScattered(RENext)) 361 pair_r_value = info->O->getScatteredRelocationValue(RENext); 362 else 363 return 0; 364 } 365 } else { 366 isExtern = info->O->getPlainRelocationExternal(RE); 367 if (isExtern) { 368 symbol_iterator RelocSym = Reloc.getSymbol(); 369 Symbol = *RelocSym; 370 } 371 } 372 reloc_found = true; 373 break; 374 } 375 } 376 if (reloc_found && isExtern) { 377 StringRef SymName; 378 Symbol.getName(SymName); 379 const char *name = SymName.data(); 380 op_info->AddSymbol.Present = 1; 381 op_info->AddSymbol.Name = name; 382 // For i386 extern relocation entries the value in the instruction is 383 // the offset from the symbol, and value is already set in op_info->Value. 384 return 1; 385 } 386 if (reloc_found && (r_type == MachO::GENERIC_RELOC_SECTDIFF || 387 r_type == MachO::GENERIC_RELOC_LOCAL_SECTDIFF)) { 388 const char *add = GuessSymbolName(r_value, info); 389 const char *sub = GuessSymbolName(pair_r_value, info); 390 uint32_t offset = value - (r_value - pair_r_value); 391 op_info->AddSymbol.Present = 1; 392 if (add != nullptr) 393 op_info->AddSymbol.Name = add; 394 else 395 op_info->AddSymbol.Value = r_value; 396 op_info->SubtractSymbol.Present = 1; 397 if (sub != nullptr) 398 op_info->SubtractSymbol.Name = sub; 399 else 400 op_info->SubtractSymbol.Value = pair_r_value; 401 op_info->Value = offset; 402 return 1; 403 } 404 // TODO: 405 // Second search the external relocation entries of a fully linked image 406 // (if any) for an entry that matches this segment offset. 407 // uint32_t seg_offset = (Pc + Offset); 408 return 0; 409 } else if (Arch == Triple::x86_64) { 410 if (Size != 1 && Size != 2 && Size != 4 && Size != 0) 411 return 0; 412 // First search the section's relocation entries (if any) for an entry 413 // for this section offset. 414 uint64_t sect_addr = info->S.getAddress(); 415 uint64_t sect_offset = (Pc + Offset) - sect_addr; 416 bool reloc_found = false; 417 DataRefImpl Rel; 418 MachO::any_relocation_info RE; 419 bool isExtern = false; 420 SymbolRef Symbol; 421 for (const RelocationRef &Reloc : info->S.relocations()) { 422 uint64_t RelocOffset; 423 Reloc.getOffset(RelocOffset); 424 if (RelocOffset == sect_offset) { 425 Rel = Reloc.getRawDataRefImpl(); 426 RE = info->O->getRelocation(Rel); 427 // NOTE: Scattered relocations don't exist on x86_64. 428 isExtern = info->O->getPlainRelocationExternal(RE); 429 if (isExtern) { 430 symbol_iterator RelocSym = Reloc.getSymbol(); 431 Symbol = *RelocSym; 432 } 433 reloc_found = true; 434 break; 435 } 436 } 437 if (reloc_found && isExtern) { 438 // The Value passed in will be adjusted by the Pc if the instruction 439 // adds the Pc. But for x86_64 external relocation entries the Value 440 // is the offset from the external symbol. 441 if (info->O->getAnyRelocationPCRel(RE)) 442 op_info->Value -= Pc + Offset + Size; 443 StringRef SymName; 444 Symbol.getName(SymName); 445 const char *name = SymName.data(); 446 unsigned Type = info->O->getAnyRelocationType(RE); 447 if (Type == MachO::X86_64_RELOC_SUBTRACTOR) { 448 DataRefImpl RelNext = Rel; 449 info->O->moveRelocationNext(RelNext); 450 MachO::any_relocation_info RENext = info->O->getRelocation(RelNext); 451 unsigned TypeNext = info->O->getAnyRelocationType(RENext); 452 bool isExternNext = info->O->getPlainRelocationExternal(RENext); 453 unsigned SymbolNum = info->O->getPlainRelocationSymbolNum(RENext); 454 if (TypeNext == MachO::X86_64_RELOC_UNSIGNED && isExternNext) { 455 op_info->SubtractSymbol.Present = 1; 456 op_info->SubtractSymbol.Name = name; 457 symbol_iterator RelocSymNext = info->O->getSymbolByIndex(SymbolNum); 458 Symbol = *RelocSymNext; 459 StringRef SymNameNext; 460 Symbol.getName(SymNameNext); 461 name = SymNameNext.data(); 462 } 463 } 464 // TODO: add the VariantKinds to op_info->VariantKind for relocation types 465 // like: X86_64_RELOC_TLV, X86_64_RELOC_GOT_LOAD and X86_64_RELOC_GOT. 466 op_info->AddSymbol.Present = 1; 467 op_info->AddSymbol.Name = name; 468 return 1; 469 } 470 // TODO: 471 // Second search the external relocation entries of a fully linked image 472 // (if any) for an entry that matches this segment offset. 473 // uint64_t seg_offset = (Pc + Offset); 474 return 0; 475 } else if (Arch == Triple::arm) { 476 if (Offset != 0 || (Size != 4 && Size != 2)) 477 return 0; 478 // First search the section's relocation entries (if any) for an entry 479 // for this section offset. 480 uint32_t sect_addr = info->S.getAddress(); 481 uint32_t sect_offset = (Pc + Offset) - sect_addr; 482 bool reloc_found = false; 483 DataRefImpl Rel; 484 MachO::any_relocation_info RE; 485 bool isExtern = false; 486 SymbolRef Symbol; 487 bool r_scattered = false; 488 uint32_t r_value, pair_r_value, r_type, r_length, other_half; 489 for (const RelocationRef &Reloc : info->S.relocations()) { 490 uint64_t RelocOffset; 491 Reloc.getOffset(RelocOffset); 492 if (RelocOffset == sect_offset) { 493 Rel = Reloc.getRawDataRefImpl(); 494 RE = info->O->getRelocation(Rel); 495 r_length = info->O->getAnyRelocationLength(RE); 496 r_scattered = info->O->isRelocationScattered(RE); 497 if (r_scattered) { 498 r_value = info->O->getScatteredRelocationValue(RE); 499 r_type = info->O->getScatteredRelocationType(RE); 500 } else { 501 r_type = info->O->getAnyRelocationType(RE); 502 isExtern = info->O->getPlainRelocationExternal(RE); 503 if (isExtern) { 504 symbol_iterator RelocSym = Reloc.getSymbol(); 505 Symbol = *RelocSym; 506 } 507 } 508 if (r_type == MachO::ARM_RELOC_HALF || 509 r_type == MachO::ARM_RELOC_SECTDIFF || 510 r_type == MachO::ARM_RELOC_LOCAL_SECTDIFF || 511 r_type == MachO::ARM_RELOC_HALF_SECTDIFF) { 512 DataRefImpl RelNext = Rel; 513 info->O->moveRelocationNext(RelNext); 514 MachO::any_relocation_info RENext; 515 RENext = info->O->getRelocation(RelNext); 516 other_half = info->O->getAnyRelocationAddress(RENext) & 0xffff; 517 if (info->O->isRelocationScattered(RENext)) 518 pair_r_value = info->O->getScatteredRelocationValue(RENext); 519 } 520 reloc_found = true; 521 break; 522 } 523 } 524 if (reloc_found && isExtern) { 525 StringRef SymName; 526 Symbol.getName(SymName); 527 const char *name = SymName.data(); 528 op_info->AddSymbol.Present = 1; 529 op_info->AddSymbol.Name = name; 530 if (value != 0) { 531 switch (r_type) { 532 case MachO::ARM_RELOC_HALF: 533 if ((r_length & 0x1) == 1) { 534 op_info->Value = value << 16 | other_half; 535 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16; 536 } else { 537 op_info->Value = other_half << 16 | value; 538 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16; 539 } 540 break; 541 default: 542 break; 543 } 544 } else { 545 switch (r_type) { 546 case MachO::ARM_RELOC_HALF: 547 if ((r_length & 0x1) == 1) { 548 op_info->Value = value << 16 | other_half; 549 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16; 550 } else { 551 op_info->Value = other_half << 16 | value; 552 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16; 553 } 554 break; 555 default: 556 break; 557 } 558 } 559 return 1; 560 } 561 // If we have a branch that is not an external relocation entry then 562 // return 0 so the code in tryAddingSymbolicOperand() can use the 563 // SymbolLookUp call back with the branch target address to look up the 564 // symbol and possiblity add an annotation for a symbol stub. 565 if (reloc_found && isExtern == 0 && (r_type == MachO::ARM_RELOC_BR24 || 566 r_type == MachO::ARM_THUMB_RELOC_BR22)) 567 return 0; 568 569 uint32_t offset = 0; 570 if (reloc_found) { 571 if (r_type == MachO::ARM_RELOC_HALF || 572 r_type == MachO::ARM_RELOC_HALF_SECTDIFF) { 573 if ((r_length & 0x1) == 1) 574 value = value << 16 | other_half; 575 else 576 value = other_half << 16 | value; 577 } 578 if (r_scattered && (r_type != MachO::ARM_RELOC_HALF && 579 r_type != MachO::ARM_RELOC_HALF_SECTDIFF)) { 580 offset = value - r_value; 581 value = r_value; 582 } 583 } 584 585 if (reloc_found && r_type == MachO::ARM_RELOC_HALF_SECTDIFF) { 586 if ((r_length & 0x1) == 1) 587 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16; 588 else 589 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16; 590 const char *add = GuessSymbolName(r_value, info); 591 const char *sub = GuessSymbolName(pair_r_value, info); 592 int32_t offset = value - (r_value - pair_r_value); 593 op_info->AddSymbol.Present = 1; 594 if (add != nullptr) 595 op_info->AddSymbol.Name = add; 596 else 597 op_info->AddSymbol.Value = r_value; 598 op_info->SubtractSymbol.Present = 1; 599 if (sub != nullptr) 600 op_info->SubtractSymbol.Name = sub; 601 else 602 op_info->SubtractSymbol.Value = pair_r_value; 603 op_info->Value = offset; 604 return 1; 605 } 606 607 if (reloc_found == false) 608 return 0; 609 610 op_info->AddSymbol.Present = 1; 611 op_info->Value = offset; 612 if (reloc_found) { 613 if (r_type == MachO::ARM_RELOC_HALF) { 614 if ((r_length & 0x1) == 1) 615 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16; 616 else 617 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16; 618 } 619 } 620 const char *add = GuessSymbolName(value, info); 621 if (add != nullptr) { 622 op_info->AddSymbol.Name = add; 623 return 1; 624 } 625 op_info->AddSymbol.Value = value; 626 return 1; 627 } else if (Arch == Triple::aarch64) { 628 if (Offset != 0 || Size != 4) 629 return 0; 630 // First search the section's relocation entries (if any) for an entry 631 // for this section offset. 632 uint64_t sect_addr = info->S.getAddress(); 633 uint64_t sect_offset = (Pc + Offset) - sect_addr; 634 bool reloc_found = false; 635 DataRefImpl Rel; 636 MachO::any_relocation_info RE; 637 bool isExtern = false; 638 SymbolRef Symbol; 639 uint32_t r_type = 0; 640 for (const RelocationRef &Reloc : info->S.relocations()) { 641 uint64_t RelocOffset; 642 Reloc.getOffset(RelocOffset); 643 if (RelocOffset == sect_offset) { 644 Rel = Reloc.getRawDataRefImpl(); 645 RE = info->O->getRelocation(Rel); 646 r_type = info->O->getAnyRelocationType(RE); 647 if (r_type == MachO::ARM64_RELOC_ADDEND) { 648 DataRefImpl RelNext = Rel; 649 info->O->moveRelocationNext(RelNext); 650 MachO::any_relocation_info RENext = info->O->getRelocation(RelNext); 651 if (value == 0) { 652 value = info->O->getPlainRelocationSymbolNum(RENext); 653 op_info->Value = value; 654 } 655 } 656 // NOTE: Scattered relocations don't exist on arm64. 657 isExtern = info->O->getPlainRelocationExternal(RE); 658 if (isExtern) { 659 symbol_iterator RelocSym = Reloc.getSymbol(); 660 Symbol = *RelocSym; 661 } 662 reloc_found = true; 663 break; 664 } 665 } 666 if (reloc_found && isExtern) { 667 StringRef SymName; 668 Symbol.getName(SymName); 669 const char *name = SymName.data(); 670 op_info->AddSymbol.Present = 1; 671 op_info->AddSymbol.Name = name; 672 673 switch (r_type) { 674 case MachO::ARM64_RELOC_PAGE21: 675 /* @page */ 676 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_PAGE; 677 break; 678 case MachO::ARM64_RELOC_PAGEOFF12: 679 /* @pageoff */ 680 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_PAGEOFF; 681 break; 682 case MachO::ARM64_RELOC_GOT_LOAD_PAGE21: 683 /* @gotpage */ 684 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_GOTPAGE; 685 break; 686 case MachO::ARM64_RELOC_GOT_LOAD_PAGEOFF12: 687 /* @gotpageoff */ 688 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_GOTPAGEOFF; 689 break; 690 case MachO::ARM64_RELOC_TLVP_LOAD_PAGE21: 691 /* @tvlppage is not implemented in llvm-mc */ 692 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_TLVP; 693 break; 694 case MachO::ARM64_RELOC_TLVP_LOAD_PAGEOFF12: 695 /* @tvlppageoff is not implemented in llvm-mc */ 696 op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_TLVOFF; 697 break; 698 default: 699 case MachO::ARM64_RELOC_BRANCH26: 700 op_info->VariantKind = LLVMDisassembler_VariantKind_None; 701 break; 702 } 703 return 1; 704 } 705 return 0; 706 } else { 707 return 0; 708 } 709} 710 711// GuessCstringPointer is passed the address of what might be a pointer to a 712// literal string in a cstring section. If that address is in a cstring section 713// it returns a pointer to that string. Else it returns nullptr. 714const char *GuessCstringPointer(uint64_t ReferenceValue, 715 struct DisassembleInfo *info) { 716 uint32_t LoadCommandCount = info->O->getHeader().ncmds; 717 MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo(); 718 for (unsigned I = 0;; ++I) { 719 if (Load.C.cmd == MachO::LC_SEGMENT_64) { 720 MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load); 721 for (unsigned J = 0; J < Seg.nsects; ++J) { 722 MachO::section_64 Sec = info->O->getSection64(Load, J); 723 uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; 724 if (section_type == MachO::S_CSTRING_LITERALS && 725 ReferenceValue >= Sec.addr && 726 ReferenceValue < Sec.addr + Sec.size) { 727 uint64_t sect_offset = ReferenceValue - Sec.addr; 728 uint64_t object_offset = Sec.offset + sect_offset; 729 StringRef MachOContents = info->O->getData(); 730 uint64_t object_size = MachOContents.size(); 731 const char *object_addr = (const char *)MachOContents.data(); 732 if (object_offset < object_size) { 733 const char *name = object_addr + object_offset; 734 return name; 735 } else { 736 return nullptr; 737 } 738 } 739 } 740 } else if (Load.C.cmd == MachO::LC_SEGMENT) { 741 MachO::segment_command Seg = info->O->getSegmentLoadCommand(Load); 742 for (unsigned J = 0; J < Seg.nsects; ++J) { 743 MachO::section Sec = info->O->getSection(Load, J); 744 uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; 745 if (section_type == MachO::S_CSTRING_LITERALS && 746 ReferenceValue >= Sec.addr && 747 ReferenceValue < Sec.addr + Sec.size) { 748 uint64_t sect_offset = ReferenceValue - Sec.addr; 749 uint64_t object_offset = Sec.offset + sect_offset; 750 StringRef MachOContents = info->O->getData(); 751 uint64_t object_size = MachOContents.size(); 752 const char *object_addr = (const char *)MachOContents.data(); 753 if (object_offset < object_size) { 754 const char *name = object_addr + object_offset; 755 return name; 756 } else { 757 return nullptr; 758 } 759 } 760 } 761 } 762 if (I == LoadCommandCount - 1) 763 break; 764 else 765 Load = info->O->getNextLoadCommandInfo(Load); 766 } 767 return nullptr; 768} 769 770// GuessIndirectSymbol returns the name of the indirect symbol for the 771// ReferenceValue passed in or nullptr. This is used when ReferenceValue maybe 772// an address of a symbol stub or a lazy or non-lazy pointer to associate the 773// symbol name being referenced by the stub or pointer. 774static const char *GuessIndirectSymbol(uint64_t ReferenceValue, 775 struct DisassembleInfo *info) { 776 uint32_t LoadCommandCount = info->O->getHeader().ncmds; 777 MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo(); 778 MachO::dysymtab_command Dysymtab = info->O->getDysymtabLoadCommand(); 779 MachO::symtab_command Symtab = info->O->getSymtabLoadCommand(); 780 for (unsigned I = 0;; ++I) { 781 if (Load.C.cmd == MachO::LC_SEGMENT_64) { 782 MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load); 783 for (unsigned J = 0; J < Seg.nsects; ++J) { 784 MachO::section_64 Sec = info->O->getSection64(Load, J); 785 uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; 786 if ((section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS || 787 section_type == MachO::S_LAZY_SYMBOL_POINTERS || 788 section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS || 789 section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS || 790 section_type == MachO::S_SYMBOL_STUBS) && 791 ReferenceValue >= Sec.addr && 792 ReferenceValue < Sec.addr + Sec.size) { 793 uint32_t stride; 794 if (section_type == MachO::S_SYMBOL_STUBS) 795 stride = Sec.reserved2; 796 else 797 stride = 8; 798 if (stride == 0) 799 return nullptr; 800 uint32_t index = Sec.reserved1 + (ReferenceValue - Sec.addr) / stride; 801 if (index < Dysymtab.nindirectsyms) { 802 uint32_t indirect_symbol = 803 info->O->getIndirectSymbolTableEntry(Dysymtab, index); 804 if (indirect_symbol < Symtab.nsyms) { 805 symbol_iterator Sym = info->O->getSymbolByIndex(indirect_symbol); 806 SymbolRef Symbol = *Sym; 807 StringRef SymName; 808 Symbol.getName(SymName); 809 const char *name = SymName.data(); 810 return name; 811 } 812 } 813 } 814 } 815 } else if (Load.C.cmd == MachO::LC_SEGMENT) { 816 MachO::segment_command Seg = info->O->getSegmentLoadCommand(Load); 817 for (unsigned J = 0; J < Seg.nsects; ++J) { 818 MachO::section Sec = info->O->getSection(Load, J); 819 uint32_t section_type = Sec.flags & MachO::SECTION_TYPE; 820 if ((section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS || 821 section_type == MachO::S_LAZY_SYMBOL_POINTERS || 822 section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS || 823 section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS || 824 section_type == MachO::S_SYMBOL_STUBS) && 825 ReferenceValue >= Sec.addr && 826 ReferenceValue < Sec.addr + Sec.size) { 827 uint32_t stride; 828 if (section_type == MachO::S_SYMBOL_STUBS) 829 stride = Sec.reserved2; 830 else 831 stride = 4; 832 if (stride == 0) 833 return nullptr; 834 uint32_t index = Sec.reserved1 + (ReferenceValue - Sec.addr) / stride; 835 if (index < Dysymtab.nindirectsyms) { 836 uint32_t indirect_symbol = 837 info->O->getIndirectSymbolTableEntry(Dysymtab, index); 838 if (indirect_symbol < Symtab.nsyms) { 839 symbol_iterator Sym = info->O->getSymbolByIndex(indirect_symbol); 840 SymbolRef Symbol = *Sym; 841 StringRef SymName; 842 Symbol.getName(SymName); 843 const char *name = SymName.data(); 844 return name; 845 } 846 } 847 } 848 } 849 } 850 if (I == LoadCommandCount - 1) 851 break; 852 else 853 Load = info->O->getNextLoadCommandInfo(Load); 854 } 855 return nullptr; 856} 857 858// method_reference() is called passing it the ReferenceName that might be 859// a reference it to an Objective-C method call. If so then it allocates and 860// assembles a method call string with the values last seen and saved in 861// the DisassembleInfo's class_name and selector_name fields. This is saved 862// into the method field of the info and any previous string is free'ed. 863// Then the class_name field in the info is set to nullptr. The method call 864// string is set into ReferenceName and ReferenceType is set to 865// LLVMDisassembler_ReferenceType_Out_Objc_Message. If this not a method call 866// then both ReferenceType and ReferenceName are left unchanged. 867static void method_reference(struct DisassembleInfo *info, 868 uint64_t *ReferenceType, 869 const char **ReferenceName) { 870 unsigned int Arch = info->O->getArch(); 871 if (*ReferenceName != nullptr) { 872 if (strcmp(*ReferenceName, "_objc_msgSend") == 0) { 873 if (info->selector_name != nullptr) { 874 if (info->method != nullptr) 875 free(info->method); 876 if (info->class_name != nullptr) { 877 info->method = (char *)malloc(5 + strlen(info->class_name) + 878 strlen(info->selector_name)); 879 if (info->method != nullptr) { 880 strcpy(info->method, "+["); 881 strcat(info->method, info->class_name); 882 strcat(info->method, " "); 883 strcat(info->method, info->selector_name); 884 strcat(info->method, "]"); 885 *ReferenceName = info->method; 886 *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message; 887 } 888 } else { 889 info->method = (char *)malloc(9 + strlen(info->selector_name)); 890 if (info->method != nullptr) { 891 if (Arch == Triple::x86_64) 892 strcpy(info->method, "-[%rdi "); 893 else if (Arch == Triple::aarch64) 894 strcpy(info->method, "-[x0 "); 895 else 896 strcpy(info->method, "-[r? "); 897 strcat(info->method, info->selector_name); 898 strcat(info->method, "]"); 899 *ReferenceName = info->method; 900 *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message; 901 } 902 } 903 info->class_name = nullptr; 904 } 905 } else if (strcmp(*ReferenceName, "_objc_msgSendSuper2") == 0) { 906 if (info->selector_name != nullptr) { 907 if (info->method != nullptr) 908 free(info->method); 909 info->method = (char *)malloc(17 + strlen(info->selector_name)); 910 if (info->method != nullptr) { 911 if (Arch == Triple::x86_64) 912 strcpy(info->method, "-[[%rdi super] "); 913 else if (Arch == Triple::aarch64) 914 strcpy(info->method, "-[[x0 super] "); 915 else 916 strcpy(info->method, "-[[r? super] "); 917 strcat(info->method, info->selector_name); 918 strcat(info->method, "]"); 919 *ReferenceName = info->method; 920 *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message; 921 } 922 info->class_name = nullptr; 923 } 924 } 925 } 926} 927 928// GuessPointerPointer() is passed the address of what might be a pointer to 929// a reference to an Objective-C class, selector, message ref or cfstring. 930// If so the value of the pointer is returned and one of the booleans are set 931// to true. If not zero is returned and all the booleans are set to false. 932static uint64_t GuessPointerPointer(uint64_t ReferenceValue, 933 struct DisassembleInfo *info, 934 bool &classref, bool &selref, bool &msgref, 935 bool &cfstring) { 936 classref = false; 937 selref = false; 938 msgref = false; 939 cfstring = false; 940 uint32_t LoadCommandCount = info->O->getHeader().ncmds; 941 MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo(); 942 for (unsigned I = 0;; ++I) { 943 if (Load.C.cmd == MachO::LC_SEGMENT_64) { 944 MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load); 945 for (unsigned J = 0; J < Seg.nsects; ++J) { 946 MachO::section_64 Sec = info->O->getSection64(Load, J); 947 if ((strncmp(Sec.sectname, "__objc_selrefs", 16) == 0 || 948 strncmp(Sec.sectname, "__objc_classrefs", 16) == 0 || 949 strncmp(Sec.sectname, "__objc_superrefs", 16) == 0 || 950 strncmp(Sec.sectname, "__objc_msgrefs", 16) == 0 || 951 strncmp(Sec.sectname, "__cfstring", 16) == 0) && 952 ReferenceValue >= Sec.addr && 953 ReferenceValue < Sec.addr + Sec.size) { 954 uint64_t sect_offset = ReferenceValue - Sec.addr; 955 uint64_t object_offset = Sec.offset + sect_offset; 956 StringRef MachOContents = info->O->getData(); 957 uint64_t object_size = MachOContents.size(); 958 const char *object_addr = (const char *)MachOContents.data(); 959 if (object_offset < object_size) { 960 uint64_t pointer_value; 961 memcpy(&pointer_value, object_addr + object_offset, 962 sizeof(uint64_t)); 963 if (info->O->isLittleEndian() != sys::IsLittleEndianHost) 964 sys::swapByteOrder(pointer_value); 965 if (strncmp(Sec.sectname, "__objc_selrefs", 16) == 0) 966 selref = true; 967 else if (strncmp(Sec.sectname, "__objc_classrefs", 16) == 0 || 968 strncmp(Sec.sectname, "__objc_superrefs", 16) == 0) 969 classref = true; 970 else if (strncmp(Sec.sectname, "__objc_msgrefs", 16) == 0 && 971 ReferenceValue + 8 < Sec.addr + Sec.size) { 972 msgref = true; 973 memcpy(&pointer_value, object_addr + object_offset + 8, 974 sizeof(uint64_t)); 975 if (info->O->isLittleEndian() != sys::IsLittleEndianHost) 976 sys::swapByteOrder(pointer_value); 977 } else if (strncmp(Sec.sectname, "__cfstring", 16) == 0) 978 cfstring = true; 979 return pointer_value; 980 } else { 981 return 0; 982 } 983 } 984 } 985 } 986 // TODO: Look for LC_SEGMENT for 32-bit Mach-O files. 987 if (I == LoadCommandCount - 1) 988 break; 989 else 990 Load = info->O->getNextLoadCommandInfo(Load); 991 } 992 return 0; 993} 994 995// get_pointer_64 returns a pointer to the bytes in the object file at the 996// Address from a section in the Mach-O file. And indirectly returns the 997// offset into the section, number of bytes left in the section past the offset 998// and which section is was being referenced. If the Address is not in a 999// section nullptr is returned. 1000const char *get_pointer_64(uint64_t Address, uint32_t &offset, uint32_t &left, 1001 SectionRef &S, DisassembleInfo *info) { 1002 offset = 0; 1003 left = 0; 1004 S = SectionRef(); 1005 for (unsigned SectIdx = 0; SectIdx != info->Sections->size(); SectIdx++) { 1006 uint64_t SectAddress = ((*(info->Sections))[SectIdx]).getAddress(); 1007 uint64_t SectSize = ((*(info->Sections))[SectIdx]).getSize(); 1008 if (Address >= SectAddress && Address < SectAddress + SectSize) { 1009 S = (*(info->Sections))[SectIdx]; 1010 offset = Address - SectAddress; 1011 left = SectSize - offset; 1012 StringRef SectContents; 1013 ((*(info->Sections))[SectIdx]).getContents(SectContents); 1014 return SectContents.data() + offset; 1015 } 1016 } 1017 return nullptr; 1018} 1019 1020// get_symbol_64() returns the name of a symbol (or nullptr) and the address of 1021// the symbol indirectly through n_value. Based on the relocation information 1022// for the specified section offset in the specified section reference. 1023const char *get_symbol_64(uint32_t sect_offset, SectionRef S, 1024 DisassembleInfo *info, uint64_t &n_value) { 1025 n_value = 0; 1026 if (info->verbose == false) 1027 return nullptr; 1028 1029 // See if there is an external relocation entry at the sect_offset. 1030 bool reloc_found = false; 1031 DataRefImpl Rel; 1032 MachO::any_relocation_info RE; 1033 bool isExtern = false; 1034 SymbolRef Symbol; 1035 for (const RelocationRef &Reloc : S.relocations()) { 1036 uint64_t RelocOffset; 1037 Reloc.getOffset(RelocOffset); 1038 if (RelocOffset == sect_offset) { 1039 Rel = Reloc.getRawDataRefImpl(); 1040 RE = info->O->getRelocation(Rel); 1041 if (info->O->isRelocationScattered(RE)) 1042 continue; 1043 isExtern = info->O->getPlainRelocationExternal(RE); 1044 if (isExtern) { 1045 symbol_iterator RelocSym = Reloc.getSymbol(); 1046 Symbol = *RelocSym; 1047 } 1048 reloc_found = true; 1049 break; 1050 } 1051 } 1052 // If there is an external relocation entry for a symbol in this section 1053 // at this section_offset then use that symbol's value for the n_value 1054 // and return its name. 1055 const char *SymbolName = nullptr; 1056 if (reloc_found && isExtern) { 1057 Symbol.getAddress(n_value); 1058 StringRef name; 1059 Symbol.getName(name); 1060 if (!name.empty()) { 1061 SymbolName = name.data(); 1062 return SymbolName; 1063 } 1064 } 1065 1066 // TODO: For fully linked images, look through the external relocation 1067 // entries off the dynamic symtab command. For these the r_offset is from the 1068 // start of the first writeable segment in the Mach-O file. So the offset 1069 // to this section from that segment is passed to this routine by the caller, 1070 // as the database_offset. Which is the difference of the section's starting 1071 // address and the first writable segment. 1072 // 1073 // NOTE: need add passing the database_offset to this routine. 1074 1075 // TODO: We did not find an external relocation entry so look up the 1076 // ReferenceValue as an address of a symbol and if found return that symbol's 1077 // name. 1078 // 1079 // NOTE: need add passing the ReferenceValue to this routine. Then that code 1080 // would simply be this: 1081 // SymbolName = GuessSymbolName(ReferenceValue, info); 1082 1083 return SymbolName; 1084} 1085 1086// These are structs in the Objective-C meta data and read to produce the 1087// comments for disassembly. While these are part of the ABI they are no 1088// public defintions. So the are here not in include/llvm/Support/MachO.h . 1089 1090// The cfstring object in a 64-bit Mach-O file. 1091struct cfstring64_t { 1092 uint64_t isa; // class64_t * (64-bit pointer) 1093 uint64_t flags; // flag bits 1094 uint64_t characters; // char * (64-bit pointer) 1095 uint64_t length; // number of non-NULL characters in above 1096}; 1097 1098// The class object in a 64-bit Mach-O file. 1099struct class64_t { 1100 uint64_t isa; // class64_t * (64-bit pointer) 1101 uint64_t superclass; // class64_t * (64-bit pointer) 1102 uint64_t cache; // Cache (64-bit pointer) 1103 uint64_t vtable; // IMP * (64-bit pointer) 1104 uint64_t data; // class_ro64_t * (64-bit pointer) 1105}; 1106 1107struct class_ro64_t { 1108 uint32_t flags; 1109 uint32_t instanceStart; 1110 uint32_t instanceSize; 1111 uint32_t reserved; 1112 uint64_t ivarLayout; // const uint8_t * (64-bit pointer) 1113 uint64_t name; // const char * (64-bit pointer) 1114 uint64_t baseMethods; // const method_list_t * (64-bit pointer) 1115 uint64_t baseProtocols; // const protocol_list_t * (64-bit pointer) 1116 uint64_t ivars; // const ivar_list_t * (64-bit pointer) 1117 uint64_t weakIvarLayout; // const uint8_t * (64-bit pointer) 1118 uint64_t baseProperties; // const struct objc_property_list (64-bit pointer) 1119}; 1120 1121inline void swapStruct(struct cfstring64_t &cfs) { 1122 sys::swapByteOrder(cfs.isa); 1123 sys::swapByteOrder(cfs.flags); 1124 sys::swapByteOrder(cfs.characters); 1125 sys::swapByteOrder(cfs.length); 1126} 1127 1128inline void swapStruct(struct class64_t &c) { 1129 sys::swapByteOrder(c.isa); 1130 sys::swapByteOrder(c.superclass); 1131 sys::swapByteOrder(c.cache); 1132 sys::swapByteOrder(c.vtable); 1133 sys::swapByteOrder(c.data); 1134} 1135 1136inline void swapStruct(struct class_ro64_t &cro) { 1137 sys::swapByteOrder(cro.flags); 1138 sys::swapByteOrder(cro.instanceStart); 1139 sys::swapByteOrder(cro.instanceSize); 1140 sys::swapByteOrder(cro.reserved); 1141 sys::swapByteOrder(cro.ivarLayout); 1142 sys::swapByteOrder(cro.name); 1143 sys::swapByteOrder(cro.baseMethods); 1144 sys::swapByteOrder(cro.baseProtocols); 1145 sys::swapByteOrder(cro.ivars); 1146 sys::swapByteOrder(cro.weakIvarLayout); 1147 sys::swapByteOrder(cro.baseProperties); 1148} 1149 1150static const char *get_dyld_bind_info_symbolname(uint64_t ReferenceValue, 1151 struct DisassembleInfo *info); 1152 1153// get_objc2_64bit_class_name() is used for disassembly and is passed a pointer 1154// to an Objective-C class and returns the class name. It is also passed the 1155// address of the pointer, so when the pointer is zero as it can be in an .o 1156// file, that is used to look for an external relocation entry with a symbol 1157// name. 1158const char *get_objc2_64bit_class_name(uint64_t pointer_value, 1159 uint64_t ReferenceValue, 1160 struct DisassembleInfo *info) { 1161 const char *r; 1162 uint32_t offset, left; 1163 SectionRef S; 1164 1165 // The pointer_value can be 0 in an object file and have a relocation 1166 // entry for the class symbol at the ReferenceValue (the address of the 1167 // pointer). 1168 if (pointer_value == 0) { 1169 r = get_pointer_64(ReferenceValue, offset, left, S, info); 1170 if (r == nullptr || left < sizeof(uint64_t)) 1171 return nullptr; 1172 uint64_t n_value; 1173 const char *symbol_name = get_symbol_64(offset, S, info, n_value); 1174 if (symbol_name == nullptr) 1175 return nullptr; 1176 const char *class_name = strrchr(symbol_name, '$'); 1177 if (class_name != nullptr && class_name[1] == '_' && class_name[2] != '\0') 1178 return class_name + 2; 1179 else 1180 return nullptr; 1181 } 1182 1183 // The case were the pointer_value is non-zero and points to a class defined 1184 // in this Mach-O file. 1185 r = get_pointer_64(pointer_value, offset, left, S, info); 1186 if (r == nullptr || left < sizeof(struct class64_t)) 1187 return nullptr; 1188 struct class64_t c; 1189 memcpy(&c, r, sizeof(struct class64_t)); 1190 if (info->O->isLittleEndian() != sys::IsLittleEndianHost) 1191 swapStruct(c); 1192 if (c.data == 0) 1193 return nullptr; 1194 r = get_pointer_64(c.data, offset, left, S, info); 1195 if (r == nullptr || left < sizeof(struct class_ro64_t)) 1196 return nullptr; 1197 struct class_ro64_t cro; 1198 memcpy(&cro, r, sizeof(struct class_ro64_t)); 1199 if (info->O->isLittleEndian() != sys::IsLittleEndianHost) 1200 swapStruct(cro); 1201 if (cro.name == 0) 1202 return nullptr; 1203 const char *name = get_pointer_64(cro.name, offset, left, S, info); 1204 return name; 1205} 1206 1207// get_objc2_64bit_cfstring_name is used for disassembly and is passed a 1208// pointer to a cfstring and returns its name or nullptr. 1209const char *get_objc2_64bit_cfstring_name(uint64_t ReferenceValue, 1210 struct DisassembleInfo *info) { 1211 const char *r, *name; 1212 uint32_t offset, left; 1213 SectionRef S; 1214 struct cfstring64_t cfs; 1215 uint64_t cfs_characters; 1216 1217 r = get_pointer_64(ReferenceValue, offset, left, S, info); 1218 if (r == nullptr || left < sizeof(struct cfstring64_t)) 1219 return nullptr; 1220 memcpy(&cfs, r, sizeof(struct cfstring64_t)); 1221 if (info->O->isLittleEndian() != sys::IsLittleEndianHost) 1222 swapStruct(cfs); 1223 if (cfs.characters == 0) { 1224 uint64_t n_value; 1225 const char *symbol_name = get_symbol_64( 1226 offset + offsetof(struct cfstring64_t, characters), S, info, n_value); 1227 if (symbol_name == nullptr) 1228 return nullptr; 1229 cfs_characters = n_value; 1230 } else 1231 cfs_characters = cfs.characters; 1232 name = get_pointer_64(cfs_characters, offset, left, S, info); 1233 1234 return name; 1235} 1236 1237// get_objc2_64bit_selref() is used for disassembly and is passed a the address 1238// of a pointer to an Objective-C selector reference when the pointer value is 1239// zero as in a .o file and is likely to have a external relocation entry with 1240// who's symbol's n_value is the real pointer to the selector name. If that is 1241// the case the real pointer to the selector name is returned else 0 is 1242// returned 1243uint64_t get_objc2_64bit_selref(uint64_t ReferenceValue, 1244 struct DisassembleInfo *info) { 1245 uint32_t offset, left; 1246 SectionRef S; 1247 1248 const char *r = get_pointer_64(ReferenceValue, offset, left, S, info); 1249 if (r == nullptr || left < sizeof(uint64_t)) 1250 return 0; 1251 uint64_t n_value; 1252 const char *symbol_name = get_symbol_64(offset, S, info, n_value); 1253 if (symbol_name == nullptr) 1254 return 0; 1255 return n_value; 1256} 1257 1258// GuessLiteralPointer returns a string which for the item in the Mach-O file 1259// for the address passed in as ReferenceValue for printing as a comment with 1260// the instruction and also returns the corresponding type of that item 1261// indirectly through ReferenceType. 1262// 1263// If ReferenceValue is an address of literal cstring then a pointer to the 1264// cstring is returned and ReferenceType is set to 1265// LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr . 1266// 1267// If ReferenceValue is an address of an Objective-C CFString, Selector ref or 1268// Class ref that name is returned and the ReferenceType is set accordingly. 1269// 1270// Lastly, literals which are Symbol address in a literal pool are looked for 1271// and if found the symbol name is returned and ReferenceType is set to 1272// LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr . 1273// 1274// If there is no item in the Mach-O file for the address passed in as 1275// ReferenceValue nullptr is returned and ReferenceType is unchanged. 1276const char *GuessLiteralPointer(uint64_t ReferenceValue, uint64_t ReferencePC, 1277 uint64_t *ReferenceType, 1278 struct DisassembleInfo *info) { 1279 // First see if there is an external relocation entry at the ReferencePC. 1280 uint64_t sect_addr = info->S.getAddress(); 1281 uint64_t sect_offset = ReferencePC - sect_addr; 1282 bool reloc_found = false; 1283 DataRefImpl Rel; 1284 MachO::any_relocation_info RE; 1285 bool isExtern = false; 1286 SymbolRef Symbol; 1287 for (const RelocationRef &Reloc : info->S.relocations()) { 1288 uint64_t RelocOffset; 1289 Reloc.getOffset(RelocOffset); 1290 if (RelocOffset == sect_offset) { 1291 Rel = Reloc.getRawDataRefImpl(); 1292 RE = info->O->getRelocation(Rel); 1293 if (info->O->isRelocationScattered(RE)) 1294 continue; 1295 isExtern = info->O->getPlainRelocationExternal(RE); 1296 if (isExtern) { 1297 symbol_iterator RelocSym = Reloc.getSymbol(); 1298 Symbol = *RelocSym; 1299 } 1300 reloc_found = true; 1301 break; 1302 } 1303 } 1304 // If there is an external relocation entry for a symbol in a section 1305 // then used that symbol's value for the value of the reference. 1306 if (reloc_found && isExtern) { 1307 if (info->O->getAnyRelocationPCRel(RE)) { 1308 unsigned Type = info->O->getAnyRelocationType(RE); 1309 if (Type == MachO::X86_64_RELOC_SIGNED) { 1310 Symbol.getAddress(ReferenceValue); 1311 } 1312 } 1313 } 1314 1315 // Look for literals such as Objective-C CFStrings refs, Selector refs, 1316 // Message refs and Class refs. 1317 bool classref, selref, msgref, cfstring; 1318 uint64_t pointer_value = GuessPointerPointer(ReferenceValue, info, classref, 1319 selref, msgref, cfstring); 1320 if (classref == true && pointer_value == 0) { 1321 // Note the ReferenceValue is a pointer into the __objc_classrefs section. 1322 // And the pointer_value in that section is typically zero as it will be 1323 // set by dyld as part of the "bind information". 1324 const char *name = get_dyld_bind_info_symbolname(ReferenceValue, info); 1325 if (name != nullptr) { 1326 *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Class_Ref; 1327 const char *class_name = strrchr(name, '$'); 1328 if (class_name != nullptr && class_name[1] == '_' && 1329 class_name[2] != '\0') { 1330 info->class_name = class_name + 2; 1331 return name; 1332 } 1333 } 1334 } 1335 1336 if (classref == true) { 1337 *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Class_Ref; 1338 const char *name = 1339 get_objc2_64bit_class_name(pointer_value, ReferenceValue, info); 1340 if (name != nullptr) 1341 info->class_name = name; 1342 else 1343 name = "bad class ref"; 1344 return name; 1345 } 1346 1347 if (cfstring == true) { 1348 *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_CFString_Ref; 1349 const char *name = get_objc2_64bit_cfstring_name(ReferenceValue, info); 1350 return name; 1351 } 1352 1353 if (selref == true && pointer_value == 0) 1354 pointer_value = get_objc2_64bit_selref(ReferenceValue, info); 1355 1356 if (pointer_value != 0) 1357 ReferenceValue = pointer_value; 1358 1359 const char *name = GuessCstringPointer(ReferenceValue, info); 1360 if (name) { 1361 if (pointer_value != 0 && selref == true) { 1362 *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Selector_Ref; 1363 info->selector_name = name; 1364 } else if (pointer_value != 0 && msgref == true) { 1365 info->class_name = nullptr; 1366 *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message_Ref; 1367 info->selector_name = name; 1368 } else 1369 *ReferenceType = LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr; 1370 return name; 1371 } 1372 1373 // Lastly look for an indirect symbol with this ReferenceValue which is in 1374 // a literal pool. If found return that symbol name. 1375 name = GuessIndirectSymbol(ReferenceValue, info); 1376 if (name) { 1377 *ReferenceType = LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr; 1378 return name; 1379 } 1380 1381 return nullptr; 1382} 1383 1384// SymbolizerSymbolLookUp is the symbol lookup function passed when creating 1385// the Symbolizer. It looks up the ReferenceValue using the info passed via the 1386// pointer to the struct DisassembleInfo that was passed when MCSymbolizer 1387// is created and returns the symbol name that matches the ReferenceValue or 1388// nullptr if none. The ReferenceType is passed in for the IN type of 1389// reference the instruction is making from the values in defined in the header 1390// "llvm-c/Disassembler.h". On return the ReferenceType can set to a specific 1391// Out type and the ReferenceName will also be set which is added as a comment 1392// to the disassembled instruction. 1393// 1394#if HAVE_CXXABI_H 1395// If the symbol name is a C++ mangled name then the demangled name is 1396// returned through ReferenceName and ReferenceType is set to 1397// LLVMDisassembler_ReferenceType_DeMangled_Name . 1398#endif 1399// 1400// When this is called to get a symbol name for a branch target then the 1401// ReferenceType will be LLVMDisassembler_ReferenceType_In_Branch and then 1402// SymbolValue will be looked for in the indirect symbol table to determine if 1403// it is an address for a symbol stub. If so then the symbol name for that 1404// stub is returned indirectly through ReferenceName and then ReferenceType is 1405// set to LLVMDisassembler_ReferenceType_Out_SymbolStub. 1406// 1407// When this is called with an value loaded via a PC relative load then 1408// ReferenceType will be LLVMDisassembler_ReferenceType_In_PCrel_Load then the 1409// SymbolValue is checked to be an address of literal pointer, symbol pointer, 1410// or an Objective-C meta data reference. If so the output ReferenceType is 1411// set to correspond to that as well as setting the ReferenceName. 1412const char *SymbolizerSymbolLookUp(void *DisInfo, uint64_t ReferenceValue, 1413 uint64_t *ReferenceType, 1414 uint64_t ReferencePC, 1415 const char **ReferenceName) { 1416 struct DisassembleInfo *info = (struct DisassembleInfo *)DisInfo; 1417 // If no verbose symbolic information is wanted then just return nullptr. 1418 if (info->verbose == false) { 1419 *ReferenceName = nullptr; 1420 *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; 1421 return nullptr; 1422 } 1423 1424 const char *SymbolName = GuessSymbolName(ReferenceValue, info); 1425 1426 if (*ReferenceType == LLVMDisassembler_ReferenceType_In_Branch) { 1427 *ReferenceName = GuessIndirectSymbol(ReferenceValue, info); 1428 if (*ReferenceName != nullptr) { 1429 method_reference(info, ReferenceType, ReferenceName); 1430 if (*ReferenceType != LLVMDisassembler_ReferenceType_Out_Objc_Message) 1431 *ReferenceType = LLVMDisassembler_ReferenceType_Out_SymbolStub; 1432 } else 1433#if HAVE_CXXABI_H 1434 if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) { 1435 if (info->demangled_name != nullptr) 1436 free(info->demangled_name); 1437 int status; 1438 info->demangled_name = 1439 abi::__cxa_demangle(SymbolName + 1, nullptr, nullptr, &status); 1440 if (info->demangled_name != nullptr) { 1441 *ReferenceName = info->demangled_name; 1442 *ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name; 1443 } else 1444 *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; 1445 } else 1446#endif 1447 *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; 1448 } else if (*ReferenceType == LLVMDisassembler_ReferenceType_In_PCrel_Load) { 1449 *ReferenceName = 1450 GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info); 1451 if (*ReferenceName) 1452 method_reference(info, ReferenceType, ReferenceName); 1453 else 1454 *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; 1455 // If this is arm64 and the reference is an adrp instruction save the 1456 // instruction, passed in ReferenceValue and the address of the instruction 1457 // for use later if we see and add immediate instruction. 1458 } else if (info->O->getArch() == Triple::aarch64 && 1459 *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_ADRP) { 1460 info->adrp_inst = ReferenceValue; 1461 info->adrp_addr = ReferencePC; 1462 SymbolName = nullptr; 1463 *ReferenceName = nullptr; 1464 *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; 1465 // If this is arm64 and reference is an add immediate instruction and we 1466 // have 1467 // seen an adrp instruction just before it and the adrp's Xd register 1468 // matches 1469 // this add's Xn register reconstruct the value being referenced and look to 1470 // see if it is a literal pointer. Note the add immediate instruction is 1471 // passed in ReferenceValue. 1472 } else if (info->O->getArch() == Triple::aarch64 && 1473 *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_ADDXri && 1474 ReferencePC - 4 == info->adrp_addr && 1475 (info->adrp_inst & 0x9f000000) == 0x90000000 && 1476 (info->adrp_inst & 0x1f) == ((ReferenceValue >> 5) & 0x1f)) { 1477 uint32_t addxri_inst; 1478 uint64_t adrp_imm, addxri_imm; 1479 1480 adrp_imm = 1481 ((info->adrp_inst & 0x00ffffe0) >> 3) | ((info->adrp_inst >> 29) & 0x3); 1482 if (info->adrp_inst & 0x0200000) 1483 adrp_imm |= 0xfffffffffc000000LL; 1484 1485 addxri_inst = ReferenceValue; 1486 addxri_imm = (addxri_inst >> 10) & 0xfff; 1487 if (((addxri_inst >> 22) & 0x3) == 1) 1488 addxri_imm <<= 12; 1489 1490 ReferenceValue = (info->adrp_addr & 0xfffffffffffff000LL) + 1491 (adrp_imm << 12) + addxri_imm; 1492 1493 *ReferenceName = 1494 GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info); 1495 if (*ReferenceName == nullptr) 1496 *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; 1497 // If this is arm64 and the reference is a load register instruction and we 1498 // have seen an adrp instruction just before it and the adrp's Xd register 1499 // matches this add's Xn register reconstruct the value being referenced and 1500 // look to see if it is a literal pointer. Note the load register 1501 // instruction is passed in ReferenceValue. 1502 } else if (info->O->getArch() == Triple::aarch64 && 1503 *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_LDRXui && 1504 ReferencePC - 4 == info->adrp_addr && 1505 (info->adrp_inst & 0x9f000000) == 0x90000000 && 1506 (info->adrp_inst & 0x1f) == ((ReferenceValue >> 5) & 0x1f)) { 1507 uint32_t ldrxui_inst; 1508 uint64_t adrp_imm, ldrxui_imm; 1509 1510 adrp_imm = 1511 ((info->adrp_inst & 0x00ffffe0) >> 3) | ((info->adrp_inst >> 29) & 0x3); 1512 if (info->adrp_inst & 0x0200000) 1513 adrp_imm |= 0xfffffffffc000000LL; 1514 1515 ldrxui_inst = ReferenceValue; 1516 ldrxui_imm = (ldrxui_inst >> 10) & 0xfff; 1517 1518 ReferenceValue = (info->adrp_addr & 0xfffffffffffff000LL) + 1519 (adrp_imm << 12) + (ldrxui_imm << 3); 1520 1521 *ReferenceName = 1522 GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info); 1523 if (*ReferenceName == nullptr) 1524 *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; 1525 } 1526 // If this arm64 and is an load register (PC-relative) instruction the 1527 // ReferenceValue is the PC plus the immediate value. 1528 else if (info->O->getArch() == Triple::aarch64 && 1529 (*ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_LDRXl || 1530 *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_ADR)) { 1531 *ReferenceName = 1532 GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info); 1533 if (*ReferenceName == nullptr) 1534 *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; 1535 } 1536#if HAVE_CXXABI_H 1537 else if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) { 1538 if (info->demangled_name != nullptr) 1539 free(info->demangled_name); 1540 int status; 1541 info->demangled_name = 1542 abi::__cxa_demangle(SymbolName + 1, nullptr, nullptr, &status); 1543 if (info->demangled_name != nullptr) { 1544 *ReferenceName = info->demangled_name; 1545 *ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name; 1546 } 1547 } 1548#endif 1549 else { 1550 *ReferenceName = nullptr; 1551 *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None; 1552 } 1553 1554 return SymbolName; 1555} 1556 1557/// \brief Emits the comments that are stored in the CommentStream. 1558/// Each comment in the CommentStream must end with a newline. 1559static void emitComments(raw_svector_ostream &CommentStream, 1560 SmallString<128> &CommentsToEmit, 1561 formatted_raw_ostream &FormattedOS, 1562 const MCAsmInfo &MAI) { 1563 // Flush the stream before taking its content. 1564 CommentStream.flush(); 1565 StringRef Comments = CommentsToEmit.str(); 1566 // Get the default information for printing a comment. 1567 const char *CommentBegin = MAI.getCommentString(); 1568 unsigned CommentColumn = MAI.getCommentColumn(); 1569 bool IsFirst = true; 1570 while (!Comments.empty()) { 1571 if (!IsFirst) 1572 FormattedOS << '\n'; 1573 // Emit a line of comments. 1574 FormattedOS.PadToColumn(CommentColumn); 1575 size_t Position = Comments.find('\n'); 1576 FormattedOS << CommentBegin << ' ' << Comments.substr(0, Position); 1577 // Move after the newline character. 1578 Comments = Comments.substr(Position + 1); 1579 IsFirst = false; 1580 } 1581 FormattedOS.flush(); 1582 1583 // Tell the comment stream that the vector changed underneath it. 1584 CommentsToEmit.clear(); 1585 CommentStream.resync(); 1586} 1587 1588static void DisassembleInputMachO2(StringRef Filename, 1589 MachOObjectFile *MachOOF) { 1590 const char *McpuDefault = nullptr; 1591 const Target *ThumbTarget = nullptr; 1592 const Target *TheTarget = GetTarget(MachOOF, &McpuDefault, &ThumbTarget); 1593 if (!TheTarget) { 1594 // GetTarget prints out stuff. 1595 return; 1596 } 1597 if (MCPU.empty() && McpuDefault) 1598 MCPU = McpuDefault; 1599 1600 std::unique_ptr<const MCInstrInfo> InstrInfo(TheTarget->createMCInstrInfo()); 1601 std::unique_ptr<const MCInstrInfo> ThumbInstrInfo; 1602 if (ThumbTarget) 1603 ThumbInstrInfo.reset(ThumbTarget->createMCInstrInfo()); 1604 1605 // Package up features to be passed to target/subtarget 1606 std::string FeaturesStr; 1607 if (MAttrs.size()) { 1608 SubtargetFeatures Features; 1609 for (unsigned i = 0; i != MAttrs.size(); ++i) 1610 Features.AddFeature(MAttrs[i]); 1611 FeaturesStr = Features.getString(); 1612 } 1613 1614 // Set up disassembler. 1615 std::unique_ptr<const MCRegisterInfo> MRI( 1616 TheTarget->createMCRegInfo(TripleName)); 1617 std::unique_ptr<const MCAsmInfo> AsmInfo( 1618 TheTarget->createMCAsmInfo(*MRI, TripleName)); 1619 std::unique_ptr<const MCSubtargetInfo> STI( 1620 TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr)); 1621 MCContext Ctx(AsmInfo.get(), MRI.get(), nullptr); 1622 std::unique_ptr<MCDisassembler> DisAsm( 1623 TheTarget->createMCDisassembler(*STI, Ctx)); 1624 std::unique_ptr<MCSymbolizer> Symbolizer; 1625 struct DisassembleInfo SymbolizerInfo; 1626 std::unique_ptr<MCRelocationInfo> RelInfo( 1627 TheTarget->createMCRelocationInfo(TripleName, Ctx)); 1628 if (RelInfo) { 1629 Symbolizer.reset(TheTarget->createMCSymbolizer( 1630 TripleName, SymbolizerGetOpInfo, SymbolizerSymbolLookUp, 1631 &SymbolizerInfo, &Ctx, RelInfo.release())); 1632 DisAsm->setSymbolizer(std::move(Symbolizer)); 1633 } 1634 int AsmPrinterVariant = AsmInfo->getAssemblerDialect(); 1635 std::unique_ptr<MCInstPrinter> IP(TheTarget->createMCInstPrinter( 1636 AsmPrinterVariant, *AsmInfo, *InstrInfo, *MRI, *STI)); 1637 // Set the display preference for hex vs. decimal immediates. 1638 IP->setPrintImmHex(PrintImmHex); 1639 // Comment stream and backing vector. 1640 SmallString<128> CommentsToEmit; 1641 raw_svector_ostream CommentStream(CommentsToEmit); 1642 1643 if (!AsmInfo || !STI || !DisAsm || !IP) { 1644 errs() << "error: couldn't initialize disassembler for target " 1645 << TripleName << '\n'; 1646 return; 1647 } 1648 1649 // Set up thumb disassembler. 1650 std::unique_ptr<const MCRegisterInfo> ThumbMRI; 1651 std::unique_ptr<const MCAsmInfo> ThumbAsmInfo; 1652 std::unique_ptr<const MCSubtargetInfo> ThumbSTI; 1653 std::unique_ptr<MCDisassembler> ThumbDisAsm; 1654 std::unique_ptr<MCInstPrinter> ThumbIP; 1655 std::unique_ptr<MCContext> ThumbCtx; 1656 std::unique_ptr<MCSymbolizer> ThumbSymbolizer; 1657 struct DisassembleInfo ThumbSymbolizerInfo; 1658 std::unique_ptr<MCRelocationInfo> ThumbRelInfo; 1659 if (ThumbTarget) { 1660 ThumbMRI.reset(ThumbTarget->createMCRegInfo(ThumbTripleName)); 1661 ThumbAsmInfo.reset( 1662 ThumbTarget->createMCAsmInfo(*ThumbMRI, ThumbTripleName)); 1663 ThumbSTI.reset( 1664 ThumbTarget->createMCSubtargetInfo(ThumbTripleName, MCPU, FeaturesStr)); 1665 ThumbCtx.reset(new MCContext(ThumbAsmInfo.get(), ThumbMRI.get(), nullptr)); 1666 ThumbDisAsm.reset(ThumbTarget->createMCDisassembler(*ThumbSTI, *ThumbCtx)); 1667 MCContext *PtrThumbCtx = ThumbCtx.get(); 1668 ThumbRelInfo.reset( 1669 ThumbTarget->createMCRelocationInfo(ThumbTripleName, *PtrThumbCtx)); 1670 if (ThumbRelInfo) { 1671 ThumbSymbolizer.reset(ThumbTarget->createMCSymbolizer( 1672 ThumbTripleName, SymbolizerGetOpInfo, SymbolizerSymbolLookUp, 1673 &ThumbSymbolizerInfo, PtrThumbCtx, ThumbRelInfo.release())); 1674 ThumbDisAsm->setSymbolizer(std::move(ThumbSymbolizer)); 1675 } 1676 int ThumbAsmPrinterVariant = ThumbAsmInfo->getAssemblerDialect(); 1677 ThumbIP.reset(ThumbTarget->createMCInstPrinter( 1678 ThumbAsmPrinterVariant, *ThumbAsmInfo, *ThumbInstrInfo, *ThumbMRI, 1679 *ThumbSTI)); 1680 // Set the display preference for hex vs. decimal immediates. 1681 ThumbIP->setPrintImmHex(PrintImmHex); 1682 } 1683 1684 if (ThumbTarget && (!ThumbAsmInfo || !ThumbSTI || !ThumbDisAsm || !ThumbIP)) { 1685 errs() << "error: couldn't initialize disassembler for target " 1686 << ThumbTripleName << '\n'; 1687 return; 1688 } 1689 1690 outs() << '\n' << Filename << ":\n\n"; 1691 1692 MachO::mach_header Header = MachOOF->getHeader(); 1693 1694 // FIXME: Using the -cfg command line option, this code used to be able to 1695 // annotate relocations with the referenced symbol's name, and if this was 1696 // inside a __[cf]string section, the data it points to. This is now replaced 1697 // by the upcoming MCSymbolizer, which needs the appropriate setup done above. 1698 std::vector<SectionRef> Sections; 1699 std::vector<SymbolRef> Symbols; 1700 SmallVector<uint64_t, 8> FoundFns; 1701 uint64_t BaseSegmentAddress; 1702 1703 getSectionsAndSymbols(Header, MachOOF, Sections, Symbols, FoundFns, 1704 BaseSegmentAddress); 1705 1706 // Sort the symbols by address, just in case they didn't come in that way. 1707 std::sort(Symbols.begin(), Symbols.end(), SymbolSorter()); 1708 1709 // Build a data in code table that is sorted on by the address of each entry. 1710 uint64_t BaseAddress = 0; 1711 if (Header.filetype == MachO::MH_OBJECT) 1712 BaseAddress = Sections[0].getAddress(); 1713 else 1714 BaseAddress = BaseSegmentAddress; 1715 DiceTable Dices; 1716 for (dice_iterator DI = MachOOF->begin_dices(), DE = MachOOF->end_dices(); 1717 DI != DE; ++DI) { 1718 uint32_t Offset; 1719 DI->getOffset(Offset); 1720 Dices.push_back(std::make_pair(BaseAddress + Offset, *DI)); 1721 } 1722 array_pod_sort(Dices.begin(), Dices.end()); 1723 1724#ifndef NDEBUG 1725 raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls(); 1726#else 1727 raw_ostream &DebugOut = nulls(); 1728#endif 1729 1730 std::unique_ptr<DIContext> diContext; 1731 ObjectFile *DbgObj = MachOOF; 1732 // Try to find debug info and set up the DIContext for it. 1733 if (UseDbg) { 1734 // A separate DSym file path was specified, parse it as a macho file, 1735 // get the sections and supply it to the section name parsing machinery. 1736 if (!DSYMFile.empty()) { 1737 ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr = 1738 MemoryBuffer::getFileOrSTDIN(DSYMFile); 1739 if (std::error_code EC = BufOrErr.getError()) { 1740 errs() << "llvm-objdump: " << Filename << ": " << EC.message() << '\n'; 1741 return; 1742 } 1743 DbgObj = 1744 ObjectFile::createMachOObjectFile(BufOrErr.get()->getMemBufferRef()) 1745 .get() 1746 .release(); 1747 } 1748 1749 // Setup the DIContext 1750 diContext.reset(DIContext::getDWARFContext(*DbgObj)); 1751 } 1752 1753 for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) { 1754 1755 bool SectIsText = Sections[SectIdx].isText(); 1756 if (SectIsText == false) 1757 continue; 1758 1759 StringRef SectName; 1760 if (Sections[SectIdx].getName(SectName) || SectName != "__text") 1761 continue; // Skip non-text sections 1762 1763 DataRefImpl DR = Sections[SectIdx].getRawDataRefImpl(); 1764 1765 StringRef SegmentName = MachOOF->getSectionFinalSegmentName(DR); 1766 if (SegmentName != "__TEXT") 1767 continue; 1768 1769 StringRef BytesStr; 1770 Sections[SectIdx].getContents(BytesStr); 1771 ArrayRef<uint8_t> Bytes(reinterpret_cast<const uint8_t *>(BytesStr.data()), 1772 BytesStr.size()); 1773 uint64_t SectAddress = Sections[SectIdx].getAddress(); 1774 1775 bool symbolTableWorked = false; 1776 1777 // Parse relocations. 1778 std::vector<std::pair<uint64_t, SymbolRef>> Relocs; 1779 for (const RelocationRef &Reloc : Sections[SectIdx].relocations()) { 1780 uint64_t RelocOffset; 1781 Reloc.getOffset(RelocOffset); 1782 uint64_t SectionAddress = Sections[SectIdx].getAddress(); 1783 RelocOffset -= SectionAddress; 1784 1785 symbol_iterator RelocSym = Reloc.getSymbol(); 1786 1787 Relocs.push_back(std::make_pair(RelocOffset, *RelocSym)); 1788 } 1789 array_pod_sort(Relocs.begin(), Relocs.end()); 1790 1791 // Create a map of symbol addresses to symbol names for use by 1792 // the SymbolizerSymbolLookUp() routine. 1793 SymbolAddressMap AddrMap; 1794 for (const SymbolRef &Symbol : MachOOF->symbols()) { 1795 SymbolRef::Type ST; 1796 Symbol.getType(ST); 1797 if (ST == SymbolRef::ST_Function || ST == SymbolRef::ST_Data || 1798 ST == SymbolRef::ST_Other) { 1799 uint64_t Address; 1800 Symbol.getAddress(Address); 1801 StringRef SymName; 1802 Symbol.getName(SymName); 1803 AddrMap[Address] = SymName; 1804 } 1805 } 1806 // Set up the block of info used by the Symbolizer call backs. 1807 SymbolizerInfo.verbose = true; 1808 SymbolizerInfo.O = MachOOF; 1809 SymbolizerInfo.S = Sections[SectIdx]; 1810 SymbolizerInfo.AddrMap = &AddrMap; 1811 SymbolizerInfo.Sections = &Sections; 1812 SymbolizerInfo.class_name = nullptr; 1813 SymbolizerInfo.selector_name = nullptr; 1814 SymbolizerInfo.method = nullptr; 1815 SymbolizerInfo.demangled_name = nullptr; 1816 SymbolizerInfo.bindtable = nullptr; 1817 SymbolizerInfo.adrp_addr = 0; 1818 SymbolizerInfo.adrp_inst = 0; 1819 // Same for the ThumbSymbolizer 1820 ThumbSymbolizerInfo.verbose = true; 1821 ThumbSymbolizerInfo.O = MachOOF; 1822 ThumbSymbolizerInfo.S = Sections[SectIdx]; 1823 ThumbSymbolizerInfo.AddrMap = &AddrMap; 1824 ThumbSymbolizerInfo.Sections = &Sections; 1825 ThumbSymbolizerInfo.class_name = nullptr; 1826 ThumbSymbolizerInfo.selector_name = nullptr; 1827 ThumbSymbolizerInfo.method = nullptr; 1828 ThumbSymbolizerInfo.demangled_name = nullptr; 1829 ThumbSymbolizerInfo.bindtable = nullptr; 1830 ThumbSymbolizerInfo.adrp_addr = 0; 1831 ThumbSymbolizerInfo.adrp_inst = 0; 1832 1833 // Disassemble symbol by symbol. 1834 for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) { 1835 StringRef SymName; 1836 Symbols[SymIdx].getName(SymName); 1837 1838 SymbolRef::Type ST; 1839 Symbols[SymIdx].getType(ST); 1840 if (ST != SymbolRef::ST_Function) 1841 continue; 1842 1843 // Make sure the symbol is defined in this section. 1844 bool containsSym = Sections[SectIdx].containsSymbol(Symbols[SymIdx]); 1845 if (!containsSym) 1846 continue; 1847 1848 // Start at the address of the symbol relative to the section's address. 1849 uint64_t Start = 0; 1850 uint64_t SectionAddress = Sections[SectIdx].getAddress(); 1851 Symbols[SymIdx].getAddress(Start); 1852 Start -= SectionAddress; 1853 1854 // Stop disassembling either at the beginning of the next symbol or at 1855 // the end of the section. 1856 bool containsNextSym = false; 1857 uint64_t NextSym = 0; 1858 uint64_t NextSymIdx = SymIdx + 1; 1859 while (Symbols.size() > NextSymIdx) { 1860 SymbolRef::Type NextSymType; 1861 Symbols[NextSymIdx].getType(NextSymType); 1862 if (NextSymType == SymbolRef::ST_Function) { 1863 containsNextSym = 1864 Sections[SectIdx].containsSymbol(Symbols[NextSymIdx]); 1865 Symbols[NextSymIdx].getAddress(NextSym); 1866 NextSym -= SectionAddress; 1867 break; 1868 } 1869 ++NextSymIdx; 1870 } 1871 1872 uint64_t SectSize = Sections[SectIdx].getSize(); 1873 uint64_t End = containsNextSym ? NextSym : SectSize; 1874 uint64_t Size; 1875 1876 symbolTableWorked = true; 1877 1878 DataRefImpl Symb = Symbols[SymIdx].getRawDataRefImpl(); 1879 bool isThumb = 1880 (MachOOF->getSymbolFlags(Symb) & SymbolRef::SF_Thumb) && ThumbTarget; 1881 1882 outs() << SymName << ":\n"; 1883 DILineInfo lastLine; 1884 for (uint64_t Index = Start; Index < End; Index += Size) { 1885 MCInst Inst; 1886 1887 uint64_t PC = SectAddress + Index; 1888 if (FullLeadingAddr) { 1889 if (MachOOF->is64Bit()) 1890 outs() << format("%016" PRIx64, PC); 1891 else 1892 outs() << format("%08" PRIx64, PC); 1893 } else { 1894 outs() << format("%8" PRIx64 ":", PC); 1895 } 1896 if (!NoShowRawInsn) 1897 outs() << "\t"; 1898 1899 // Check the data in code table here to see if this is data not an 1900 // instruction to be disassembled. 1901 DiceTable Dice; 1902 Dice.push_back(std::make_pair(PC, DiceRef())); 1903 dice_table_iterator DTI = 1904 std::search(Dices.begin(), Dices.end(), Dice.begin(), Dice.end(), 1905 compareDiceTableEntries); 1906 if (DTI != Dices.end()) { 1907 uint16_t Length; 1908 DTI->second.getLength(Length); 1909 uint16_t Kind; 1910 DTI->second.getKind(Kind); 1911 Size = DumpDataInCode(reinterpret_cast<const char *>(Bytes.data()) + 1912 Index, 1913 Length, Kind); 1914 if ((Kind == MachO::DICE_KIND_JUMP_TABLE8) && 1915 (PC == (DTI->first + Length - 1)) && (Length & 1)) 1916 Size++; 1917 continue; 1918 } 1919 1920 SmallVector<char, 64> AnnotationsBytes; 1921 raw_svector_ostream Annotations(AnnotationsBytes); 1922 1923 bool gotInst; 1924 if (isThumb) 1925 gotInst = ThumbDisAsm->getInstruction(Inst, Size, Bytes.slice(Index), 1926 PC, DebugOut, Annotations); 1927 else 1928 gotInst = DisAsm->getInstruction(Inst, Size, Bytes.slice(Index), PC, 1929 DebugOut, Annotations); 1930 if (gotInst) { 1931 if (!NoShowRawInsn) { 1932 DumpBytes(StringRef( 1933 reinterpret_cast<const char *>(Bytes.data()) + Index, Size)); 1934 } 1935 formatted_raw_ostream FormattedOS(outs()); 1936 Annotations.flush(); 1937 StringRef AnnotationsStr = Annotations.str(); 1938 if (isThumb) 1939 ThumbIP->printInst(&Inst, FormattedOS, AnnotationsStr); 1940 else 1941 IP->printInst(&Inst, FormattedOS, AnnotationsStr); 1942 emitComments(CommentStream, CommentsToEmit, FormattedOS, *AsmInfo); 1943 1944 // Print debug info. 1945 if (diContext) { 1946 DILineInfo dli = diContext->getLineInfoForAddress(PC); 1947 // Print valid line info if it changed. 1948 if (dli != lastLine && dli.Line != 0) 1949 outs() << "\t## " << dli.FileName << ':' << dli.Line << ':' 1950 << dli.Column; 1951 lastLine = dli; 1952 } 1953 outs() << "\n"; 1954 } else { 1955 unsigned int Arch = MachOOF->getArch(); 1956 if (Arch == Triple::x86_64 || Arch == Triple::x86) { 1957 outs() << format("\t.byte 0x%02x #bad opcode\n", 1958 *(Bytes.data() + Index) & 0xff); 1959 Size = 1; // skip exactly one illegible byte and move on. 1960 } else if (Arch == Triple::aarch64) { 1961 uint32_t opcode = (*(Bytes.data() + Index) & 0xff) | 1962 (*(Bytes.data() + Index + 1) & 0xff) << 8 | 1963 (*(Bytes.data() + Index + 2) & 0xff) << 16 | 1964 (*(Bytes.data() + Index + 3) & 0xff) << 24; 1965 outs() << format("\t.long\t0x%08x\n", opcode); 1966 Size = 4; 1967 } else { 1968 errs() << "llvm-objdump: warning: invalid instruction encoding\n"; 1969 if (Size == 0) 1970 Size = 1; // skip illegible bytes 1971 } 1972 } 1973 } 1974 } 1975 if (!symbolTableWorked) { 1976 // Reading the symbol table didn't work, disassemble the whole section. 1977 uint64_t SectAddress = Sections[SectIdx].getAddress(); 1978 uint64_t SectSize = Sections[SectIdx].getSize(); 1979 uint64_t InstSize; 1980 for (uint64_t Index = 0; Index < SectSize; Index += InstSize) { 1981 MCInst Inst; 1982 1983 uint64_t PC = SectAddress + Index; 1984 if (DisAsm->getInstruction(Inst, InstSize, Bytes.slice(Index), PC, 1985 DebugOut, nulls())) { 1986 if (FullLeadingAddr) { 1987 if (MachOOF->is64Bit()) 1988 outs() << format("%016" PRIx64, PC); 1989 else 1990 outs() << format("%08" PRIx64, PC); 1991 } else { 1992 outs() << format("%8" PRIx64 ":", PC); 1993 } 1994 if (!NoShowRawInsn) { 1995 outs() << "\t"; 1996 DumpBytes( 1997 StringRef(reinterpret_cast<const char *>(Bytes.data()) + Index, 1998 InstSize)); 1999 } 2000 IP->printInst(&Inst, outs(), ""); 2001 outs() << "\n"; 2002 } else { 2003 unsigned int Arch = MachOOF->getArch(); 2004 if (Arch == Triple::x86_64 || Arch == Triple::x86) { 2005 outs() << format("\t.byte 0x%02x #bad opcode\n", 2006 *(Bytes.data() + Index) & 0xff); 2007 InstSize = 1; // skip exactly one illegible byte and move on. 2008 } else { 2009 errs() << "llvm-objdump: warning: invalid instruction encoding\n"; 2010 if (InstSize == 0) 2011 InstSize = 1; // skip illegible bytes 2012 } 2013 } 2014 } 2015 } 2016 if (SymbolizerInfo.method != nullptr) 2017 free(SymbolizerInfo.method); 2018 if (SymbolizerInfo.demangled_name != nullptr) 2019 free(SymbolizerInfo.demangled_name); 2020 if (SymbolizerInfo.bindtable != nullptr) 2021 delete SymbolizerInfo.bindtable; 2022 if (ThumbSymbolizerInfo.method != nullptr) 2023 free(ThumbSymbolizerInfo.method); 2024 if (ThumbSymbolizerInfo.demangled_name != nullptr) 2025 free(ThumbSymbolizerInfo.demangled_name); 2026 if (ThumbSymbolizerInfo.bindtable != nullptr) 2027 delete ThumbSymbolizerInfo.bindtable; 2028 } 2029} 2030 2031//===----------------------------------------------------------------------===// 2032// __compact_unwind section dumping 2033//===----------------------------------------------------------------------===// 2034 2035namespace { 2036 2037template <typename T> static uint64_t readNext(const char *&Buf) { 2038 using llvm::support::little; 2039 using llvm::support::unaligned; 2040 2041 uint64_t Val = support::endian::read<T, little, unaligned>(Buf); 2042 Buf += sizeof(T); 2043 return Val; 2044} 2045 2046struct CompactUnwindEntry { 2047 uint32_t OffsetInSection; 2048 2049 uint64_t FunctionAddr; 2050 uint32_t Length; 2051 uint32_t CompactEncoding; 2052 uint64_t PersonalityAddr; 2053 uint64_t LSDAAddr; 2054 2055 RelocationRef FunctionReloc; 2056 RelocationRef PersonalityReloc; 2057 RelocationRef LSDAReloc; 2058 2059 CompactUnwindEntry(StringRef Contents, unsigned Offset, bool Is64) 2060 : OffsetInSection(Offset) { 2061 if (Is64) 2062 read<uint64_t>(Contents.data() + Offset); 2063 else 2064 read<uint32_t>(Contents.data() + Offset); 2065 } 2066 2067private: 2068 template <typename UIntPtr> void read(const char *Buf) { 2069 FunctionAddr = readNext<UIntPtr>(Buf); 2070 Length = readNext<uint32_t>(Buf); 2071 CompactEncoding = readNext<uint32_t>(Buf); 2072 PersonalityAddr = readNext<UIntPtr>(Buf); 2073 LSDAAddr = readNext<UIntPtr>(Buf); 2074 } 2075}; 2076} 2077 2078/// Given a relocation from __compact_unwind, consisting of the RelocationRef 2079/// and data being relocated, determine the best base Name and Addend to use for 2080/// display purposes. 2081/// 2082/// 1. An Extern relocation will directly reference a symbol (and the data is 2083/// then already an addend), so use that. 2084/// 2. Otherwise the data is an offset in the object file's layout; try to find 2085// a symbol before it in the same section, and use the offset from there. 2086/// 3. Finally, if all that fails, fall back to an offset from the start of the 2087/// referenced section. 2088static void findUnwindRelocNameAddend(const MachOObjectFile *Obj, 2089 std::map<uint64_t, SymbolRef> &Symbols, 2090 const RelocationRef &Reloc, uint64_t Addr, 2091 StringRef &Name, uint64_t &Addend) { 2092 if (Reloc.getSymbol() != Obj->symbol_end()) { 2093 Reloc.getSymbol()->getName(Name); 2094 Addend = Addr; 2095 return; 2096 } 2097 2098 auto RE = Obj->getRelocation(Reloc.getRawDataRefImpl()); 2099 SectionRef RelocSection = Obj->getRelocationSection(RE); 2100 2101 uint64_t SectionAddr = RelocSection.getAddress(); 2102 2103 auto Sym = Symbols.upper_bound(Addr); 2104 if (Sym == Symbols.begin()) { 2105 // The first symbol in the object is after this reference, the best we can 2106 // do is section-relative notation. 2107 RelocSection.getName(Name); 2108 Addend = Addr - SectionAddr; 2109 return; 2110 } 2111 2112 // Go back one so that SymbolAddress <= Addr. 2113 --Sym; 2114 2115 section_iterator SymSection = Obj->section_end(); 2116 Sym->second.getSection(SymSection); 2117 if (RelocSection == *SymSection) { 2118 // There's a valid symbol in the same section before this reference. 2119 Sym->second.getName(Name); 2120 Addend = Addr - Sym->first; 2121 return; 2122 } 2123 2124 // There is a symbol before this reference, but it's in a different 2125 // section. Probably not helpful to mention it, so use the section name. 2126 RelocSection.getName(Name); 2127 Addend = Addr - SectionAddr; 2128} 2129 2130static void printUnwindRelocDest(const MachOObjectFile *Obj, 2131 std::map<uint64_t, SymbolRef> &Symbols, 2132 const RelocationRef &Reloc, uint64_t Addr) { 2133 StringRef Name; 2134 uint64_t Addend; 2135 2136 if (!Reloc.getObjectFile()) 2137 return; 2138 2139 findUnwindRelocNameAddend(Obj, Symbols, Reloc, Addr, Name, Addend); 2140 2141 outs() << Name; 2142 if (Addend) 2143 outs() << " + " << format("0x%" PRIx64, Addend); 2144} 2145 2146static void 2147printMachOCompactUnwindSection(const MachOObjectFile *Obj, 2148 std::map<uint64_t, SymbolRef> &Symbols, 2149 const SectionRef &CompactUnwind) { 2150 2151 assert(Obj->isLittleEndian() && 2152 "There should not be a big-endian .o with __compact_unwind"); 2153 2154 bool Is64 = Obj->is64Bit(); 2155 uint32_t PointerSize = Is64 ? sizeof(uint64_t) : sizeof(uint32_t); 2156 uint32_t EntrySize = 3 * PointerSize + 2 * sizeof(uint32_t); 2157 2158 StringRef Contents; 2159 CompactUnwind.getContents(Contents); 2160 2161 SmallVector<CompactUnwindEntry, 4> CompactUnwinds; 2162 2163 // First populate the initial raw offsets, encodings and so on from the entry. 2164 for (unsigned Offset = 0; Offset < Contents.size(); Offset += EntrySize) { 2165 CompactUnwindEntry Entry(Contents.data(), Offset, Is64); 2166 CompactUnwinds.push_back(Entry); 2167 } 2168 2169 // Next we need to look at the relocations to find out what objects are 2170 // actually being referred to. 2171 for (const RelocationRef &Reloc : CompactUnwind.relocations()) { 2172 uint64_t RelocAddress; 2173 Reloc.getOffset(RelocAddress); 2174 2175 uint32_t EntryIdx = RelocAddress / EntrySize; 2176 uint32_t OffsetInEntry = RelocAddress - EntryIdx * EntrySize; 2177 CompactUnwindEntry &Entry = CompactUnwinds[EntryIdx]; 2178 2179 if (OffsetInEntry == 0) 2180 Entry.FunctionReloc = Reloc; 2181 else if (OffsetInEntry == PointerSize + 2 * sizeof(uint32_t)) 2182 Entry.PersonalityReloc = Reloc; 2183 else if (OffsetInEntry == 2 * PointerSize + 2 * sizeof(uint32_t)) 2184 Entry.LSDAReloc = Reloc; 2185 else 2186 llvm_unreachable("Unexpected relocation in __compact_unwind section"); 2187 } 2188 2189 // Finally, we're ready to print the data we've gathered. 2190 outs() << "Contents of __compact_unwind section:\n"; 2191 for (auto &Entry : CompactUnwinds) { 2192 outs() << " Entry at offset " 2193 << format("0x%" PRIx32, Entry.OffsetInSection) << ":\n"; 2194 2195 // 1. Start of the region this entry applies to. 2196 outs() << " start: " << format("0x%" PRIx64, 2197 Entry.FunctionAddr) << ' '; 2198 printUnwindRelocDest(Obj, Symbols, Entry.FunctionReloc, Entry.FunctionAddr); 2199 outs() << '\n'; 2200 2201 // 2. Length of the region this entry applies to. 2202 outs() << " length: " << format("0x%" PRIx32, Entry.Length) 2203 << '\n'; 2204 // 3. The 32-bit compact encoding. 2205 outs() << " compact encoding: " 2206 << format("0x%08" PRIx32, Entry.CompactEncoding) << '\n'; 2207 2208 // 4. The personality function, if present. 2209 if (Entry.PersonalityReloc.getObjectFile()) { 2210 outs() << " personality function: " 2211 << format("0x%" PRIx64, Entry.PersonalityAddr) << ' '; 2212 printUnwindRelocDest(Obj, Symbols, Entry.PersonalityReloc, 2213 Entry.PersonalityAddr); 2214 outs() << '\n'; 2215 } 2216 2217 // 5. This entry's language-specific data area. 2218 if (Entry.LSDAReloc.getObjectFile()) { 2219 outs() << " LSDA: " << format("0x%" PRIx64, 2220 Entry.LSDAAddr) << ' '; 2221 printUnwindRelocDest(Obj, Symbols, Entry.LSDAReloc, Entry.LSDAAddr); 2222 outs() << '\n'; 2223 } 2224 } 2225} 2226 2227//===----------------------------------------------------------------------===// 2228// __unwind_info section dumping 2229//===----------------------------------------------------------------------===// 2230 2231static void printRegularSecondLevelUnwindPage(const char *PageStart) { 2232 const char *Pos = PageStart; 2233 uint32_t Kind = readNext<uint32_t>(Pos); 2234 (void)Kind; 2235 assert(Kind == 2 && "kind for a regular 2nd level index should be 2"); 2236 2237 uint16_t EntriesStart = readNext<uint16_t>(Pos); 2238 uint16_t NumEntries = readNext<uint16_t>(Pos); 2239 2240 Pos = PageStart + EntriesStart; 2241 for (unsigned i = 0; i < NumEntries; ++i) { 2242 uint32_t FunctionOffset = readNext<uint32_t>(Pos); 2243 uint32_t Encoding = readNext<uint32_t>(Pos); 2244 2245 outs() << " [" << i << "]: " 2246 << "function offset=" << format("0x%08" PRIx32, FunctionOffset) 2247 << ", " 2248 << "encoding=" << format("0x%08" PRIx32, Encoding) << '\n'; 2249 } 2250} 2251 2252static void printCompressedSecondLevelUnwindPage( 2253 const char *PageStart, uint32_t FunctionBase, 2254 const SmallVectorImpl<uint32_t> &CommonEncodings) { 2255 const char *Pos = PageStart; 2256 uint32_t Kind = readNext<uint32_t>(Pos); 2257 (void)Kind; 2258 assert(Kind == 3 && "kind for a compressed 2nd level index should be 3"); 2259 2260 uint16_t EntriesStart = readNext<uint16_t>(Pos); 2261 uint16_t NumEntries = readNext<uint16_t>(Pos); 2262 2263 uint16_t EncodingsStart = readNext<uint16_t>(Pos); 2264 readNext<uint16_t>(Pos); 2265 const auto *PageEncodings = reinterpret_cast<const support::ulittle32_t *>( 2266 PageStart + EncodingsStart); 2267 2268 Pos = PageStart + EntriesStart; 2269 for (unsigned i = 0; i < NumEntries; ++i) { 2270 uint32_t Entry = readNext<uint32_t>(Pos); 2271 uint32_t FunctionOffset = FunctionBase + (Entry & 0xffffff); 2272 uint32_t EncodingIdx = Entry >> 24; 2273 2274 uint32_t Encoding; 2275 if (EncodingIdx < CommonEncodings.size()) 2276 Encoding = CommonEncodings[EncodingIdx]; 2277 else 2278 Encoding = PageEncodings[EncodingIdx - CommonEncodings.size()]; 2279 2280 outs() << " [" << i << "]: " 2281 << "function offset=" << format("0x%08" PRIx32, FunctionOffset) 2282 << ", " 2283 << "encoding[" << EncodingIdx 2284 << "]=" << format("0x%08" PRIx32, Encoding) << '\n'; 2285 } 2286} 2287 2288static void printMachOUnwindInfoSection(const MachOObjectFile *Obj, 2289 std::map<uint64_t, SymbolRef> &Symbols, 2290 const SectionRef &UnwindInfo) { 2291 2292 assert(Obj->isLittleEndian() && 2293 "There should not be a big-endian .o with __unwind_info"); 2294 2295 outs() << "Contents of __unwind_info section:\n"; 2296 2297 StringRef Contents; 2298 UnwindInfo.getContents(Contents); 2299 const char *Pos = Contents.data(); 2300 2301 //===---------------------------------- 2302 // Section header 2303 //===---------------------------------- 2304 2305 uint32_t Version = readNext<uint32_t>(Pos); 2306 outs() << " Version: " 2307 << format("0x%" PRIx32, Version) << '\n'; 2308 assert(Version == 1 && "only understand version 1"); 2309 2310 uint32_t CommonEncodingsStart = readNext<uint32_t>(Pos); 2311 outs() << " Common encodings array section offset: " 2312 << format("0x%" PRIx32, CommonEncodingsStart) << '\n'; 2313 uint32_t NumCommonEncodings = readNext<uint32_t>(Pos); 2314 outs() << " Number of common encodings in array: " 2315 << format("0x%" PRIx32, NumCommonEncodings) << '\n'; 2316 2317 uint32_t PersonalitiesStart = readNext<uint32_t>(Pos); 2318 outs() << " Personality function array section offset: " 2319 << format("0x%" PRIx32, PersonalitiesStart) << '\n'; 2320 uint32_t NumPersonalities = readNext<uint32_t>(Pos); 2321 outs() << " Number of personality functions in array: " 2322 << format("0x%" PRIx32, NumPersonalities) << '\n'; 2323 2324 uint32_t IndicesStart = readNext<uint32_t>(Pos); 2325 outs() << " Index array section offset: " 2326 << format("0x%" PRIx32, IndicesStart) << '\n'; 2327 uint32_t NumIndices = readNext<uint32_t>(Pos); 2328 outs() << " Number of indices in array: " 2329 << format("0x%" PRIx32, NumIndices) << '\n'; 2330 2331 //===---------------------------------- 2332 // A shared list of common encodings 2333 //===---------------------------------- 2334 2335 // These occupy indices in the range [0, N] whenever an encoding is referenced 2336 // from a compressed 2nd level index table. In practice the linker only 2337 // creates ~128 of these, so that indices are available to embed encodings in 2338 // the 2nd level index. 2339 2340 SmallVector<uint32_t, 64> CommonEncodings; 2341 outs() << " Common encodings: (count = " << NumCommonEncodings << ")\n"; 2342 Pos = Contents.data() + CommonEncodingsStart; 2343 for (unsigned i = 0; i < NumCommonEncodings; ++i) { 2344 uint32_t Encoding = readNext<uint32_t>(Pos); 2345 CommonEncodings.push_back(Encoding); 2346 2347 outs() << " encoding[" << i << "]: " << format("0x%08" PRIx32, Encoding) 2348 << '\n'; 2349 } 2350 2351 //===---------------------------------- 2352 // Personality functions used in this executable 2353 //===---------------------------------- 2354 2355 // There should be only a handful of these (one per source language, 2356 // roughly). Particularly since they only get 2 bits in the compact encoding. 2357 2358 outs() << " Personality functions: (count = " << NumPersonalities << ")\n"; 2359 Pos = Contents.data() + PersonalitiesStart; 2360 for (unsigned i = 0; i < NumPersonalities; ++i) { 2361 uint32_t PersonalityFn = readNext<uint32_t>(Pos); 2362 outs() << " personality[" << i + 1 2363 << "]: " << format("0x%08" PRIx32, PersonalityFn) << '\n'; 2364 } 2365 2366 //===---------------------------------- 2367 // The level 1 index entries 2368 //===---------------------------------- 2369 2370 // These specify an approximate place to start searching for the more detailed 2371 // information, sorted by PC. 2372 2373 struct IndexEntry { 2374 uint32_t FunctionOffset; 2375 uint32_t SecondLevelPageStart; 2376 uint32_t LSDAStart; 2377 }; 2378 2379 SmallVector<IndexEntry, 4> IndexEntries; 2380 2381 outs() << " Top level indices: (count = " << NumIndices << ")\n"; 2382 Pos = Contents.data() + IndicesStart; 2383 for (unsigned i = 0; i < NumIndices; ++i) { 2384 IndexEntry Entry; 2385 2386 Entry.FunctionOffset = readNext<uint32_t>(Pos); 2387 Entry.SecondLevelPageStart = readNext<uint32_t>(Pos); 2388 Entry.LSDAStart = readNext<uint32_t>(Pos); 2389 IndexEntries.push_back(Entry); 2390 2391 outs() << " [" << i << "]: " 2392 << "function offset=" << format("0x%08" PRIx32, Entry.FunctionOffset) 2393 << ", " 2394 << "2nd level page offset=" 2395 << format("0x%08" PRIx32, Entry.SecondLevelPageStart) << ", " 2396 << "LSDA offset=" << format("0x%08" PRIx32, Entry.LSDAStart) << '\n'; 2397 } 2398 2399 //===---------------------------------- 2400 // Next come the LSDA tables 2401 //===---------------------------------- 2402 2403 // The LSDA layout is rather implicit: it's a contiguous array of entries from 2404 // the first top-level index's LSDAOffset to the last (sentinel). 2405 2406 outs() << " LSDA descriptors:\n"; 2407 Pos = Contents.data() + IndexEntries[0].LSDAStart; 2408 int NumLSDAs = (IndexEntries.back().LSDAStart - IndexEntries[0].LSDAStart) / 2409 (2 * sizeof(uint32_t)); 2410 for (int i = 0; i < NumLSDAs; ++i) { 2411 uint32_t FunctionOffset = readNext<uint32_t>(Pos); 2412 uint32_t LSDAOffset = readNext<uint32_t>(Pos); 2413 outs() << " [" << i << "]: " 2414 << "function offset=" << format("0x%08" PRIx32, FunctionOffset) 2415 << ", " 2416 << "LSDA offset=" << format("0x%08" PRIx32, LSDAOffset) << '\n'; 2417 } 2418 2419 //===---------------------------------- 2420 // Finally, the 2nd level indices 2421 //===---------------------------------- 2422 2423 // Generally these are 4K in size, and have 2 possible forms: 2424 // + Regular stores up to 511 entries with disparate encodings 2425 // + Compressed stores up to 1021 entries if few enough compact encoding 2426 // values are used. 2427 outs() << " Second level indices:\n"; 2428 for (unsigned i = 0; i < IndexEntries.size() - 1; ++i) { 2429 // The final sentinel top-level index has no associated 2nd level page 2430 if (IndexEntries[i].SecondLevelPageStart == 0) 2431 break; 2432 2433 outs() << " Second level index[" << i << "]: " 2434 << "offset in section=" 2435 << format("0x%08" PRIx32, IndexEntries[i].SecondLevelPageStart) 2436 << ", " 2437 << "base function offset=" 2438 << format("0x%08" PRIx32, IndexEntries[i].FunctionOffset) << '\n'; 2439 2440 Pos = Contents.data() + IndexEntries[i].SecondLevelPageStart; 2441 uint32_t Kind = *reinterpret_cast<const support::ulittle32_t *>(Pos); 2442 if (Kind == 2) 2443 printRegularSecondLevelUnwindPage(Pos); 2444 else if (Kind == 3) 2445 printCompressedSecondLevelUnwindPage(Pos, IndexEntries[i].FunctionOffset, 2446 CommonEncodings); 2447 else 2448 llvm_unreachable("Do not know how to print this kind of 2nd level page"); 2449 } 2450} 2451 2452void llvm::printMachOUnwindInfo(const MachOObjectFile *Obj) { 2453 std::map<uint64_t, SymbolRef> Symbols; 2454 for (const SymbolRef &SymRef : Obj->symbols()) { 2455 // Discard any undefined or absolute symbols. They're not going to take part 2456 // in the convenience lookup for unwind info and just take up resources. 2457 section_iterator Section = Obj->section_end(); 2458 SymRef.getSection(Section); 2459 if (Section == Obj->section_end()) 2460 continue; 2461 2462 uint64_t Addr; 2463 SymRef.getAddress(Addr); 2464 Symbols.insert(std::make_pair(Addr, SymRef)); 2465 } 2466 2467 for (const SectionRef &Section : Obj->sections()) { 2468 StringRef SectName; 2469 Section.getName(SectName); 2470 if (SectName == "__compact_unwind") 2471 printMachOCompactUnwindSection(Obj, Symbols, Section); 2472 else if (SectName == "__unwind_info") 2473 printMachOUnwindInfoSection(Obj, Symbols, Section); 2474 else if (SectName == "__eh_frame") 2475 outs() << "llvm-objdump: warning: unhandled __eh_frame section\n"; 2476 } 2477} 2478 2479static void PrintMachHeader(uint32_t magic, uint32_t cputype, 2480 uint32_t cpusubtype, uint32_t filetype, 2481 uint32_t ncmds, uint32_t sizeofcmds, uint32_t flags, 2482 bool verbose) { 2483 outs() << "Mach header\n"; 2484 outs() << " magic cputype cpusubtype caps filetype ncmds " 2485 "sizeofcmds flags\n"; 2486 if (verbose) { 2487 if (magic == MachO::MH_MAGIC) 2488 outs() << " MH_MAGIC"; 2489 else if (magic == MachO::MH_MAGIC_64) 2490 outs() << "MH_MAGIC_64"; 2491 else 2492 outs() << format(" 0x%08" PRIx32, magic); 2493 switch (cputype) { 2494 case MachO::CPU_TYPE_I386: 2495 outs() << " I386"; 2496 switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) { 2497 case MachO::CPU_SUBTYPE_I386_ALL: 2498 outs() << " ALL"; 2499 break; 2500 default: 2501 outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK); 2502 break; 2503 } 2504 break; 2505 case MachO::CPU_TYPE_X86_64: 2506 outs() << " X86_64"; 2507 case MachO::CPU_SUBTYPE_X86_64_ALL: 2508 outs() << " ALL"; 2509 break; 2510 case MachO::CPU_SUBTYPE_X86_64_H: 2511 outs() << " Haswell"; 2512 outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK); 2513 break; 2514 case MachO::CPU_TYPE_ARM: 2515 outs() << " ARM"; 2516 switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) { 2517 case MachO::CPU_SUBTYPE_ARM_ALL: 2518 outs() << " ALL"; 2519 break; 2520 case MachO::CPU_SUBTYPE_ARM_V4T: 2521 outs() << " V4T"; 2522 break; 2523 case MachO::CPU_SUBTYPE_ARM_V5TEJ: 2524 outs() << " V5TEJ"; 2525 break; 2526 case MachO::CPU_SUBTYPE_ARM_XSCALE: 2527 outs() << " XSCALE"; 2528 break; 2529 case MachO::CPU_SUBTYPE_ARM_V6: 2530 outs() << " V6"; 2531 break; 2532 case MachO::CPU_SUBTYPE_ARM_V6M: 2533 outs() << " V6M"; 2534 break; 2535 case MachO::CPU_SUBTYPE_ARM_V7: 2536 outs() << " V7"; 2537 break; 2538 case MachO::CPU_SUBTYPE_ARM_V7EM: 2539 outs() << " V7EM"; 2540 break; 2541 case MachO::CPU_SUBTYPE_ARM_V7K: 2542 outs() << " V7K"; 2543 break; 2544 case MachO::CPU_SUBTYPE_ARM_V7M: 2545 outs() << " V7M"; 2546 break; 2547 case MachO::CPU_SUBTYPE_ARM_V7S: 2548 outs() << " V7S"; 2549 break; 2550 default: 2551 outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK); 2552 break; 2553 } 2554 break; 2555 case MachO::CPU_TYPE_ARM64: 2556 outs() << " ARM64"; 2557 switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) { 2558 case MachO::CPU_SUBTYPE_ARM64_ALL: 2559 outs() << " ALL"; 2560 break; 2561 default: 2562 outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK); 2563 break; 2564 } 2565 break; 2566 case MachO::CPU_TYPE_POWERPC: 2567 outs() << " PPC"; 2568 switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) { 2569 case MachO::CPU_SUBTYPE_POWERPC_ALL: 2570 outs() << " ALL"; 2571 break; 2572 default: 2573 outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK); 2574 break; 2575 } 2576 break; 2577 case MachO::CPU_TYPE_POWERPC64: 2578 outs() << " PPC64"; 2579 switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) { 2580 case MachO::CPU_SUBTYPE_POWERPC_ALL: 2581 outs() << " ALL"; 2582 break; 2583 default: 2584 outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK); 2585 break; 2586 } 2587 break; 2588 } 2589 if ((cpusubtype & MachO::CPU_SUBTYPE_MASK) == MachO::CPU_SUBTYPE_LIB64) { 2590 outs() << " LIB64"; 2591 } else { 2592 outs() << format(" 0x%02" PRIx32, 2593 (cpusubtype & MachO::CPU_SUBTYPE_MASK) >> 24); 2594 } 2595 switch (filetype) { 2596 case MachO::MH_OBJECT: 2597 outs() << " OBJECT"; 2598 break; 2599 case MachO::MH_EXECUTE: 2600 outs() << " EXECUTE"; 2601 break; 2602 case MachO::MH_FVMLIB: 2603 outs() << " FVMLIB"; 2604 break; 2605 case MachO::MH_CORE: 2606 outs() << " CORE"; 2607 break; 2608 case MachO::MH_PRELOAD: 2609 outs() << " PRELOAD"; 2610 break; 2611 case MachO::MH_DYLIB: 2612 outs() << " DYLIB"; 2613 break; 2614 case MachO::MH_DYLIB_STUB: 2615 outs() << " DYLIB_STUB"; 2616 break; 2617 case MachO::MH_DYLINKER: 2618 outs() << " DYLINKER"; 2619 break; 2620 case MachO::MH_BUNDLE: 2621 outs() << " BUNDLE"; 2622 break; 2623 case MachO::MH_DSYM: 2624 outs() << " DSYM"; 2625 break; 2626 case MachO::MH_KEXT_BUNDLE: 2627 outs() << " KEXTBUNDLE"; 2628 break; 2629 default: 2630 outs() << format(" %10u", filetype); 2631 break; 2632 } 2633 outs() << format(" %5u", ncmds); 2634 outs() << format(" %10u", sizeofcmds); 2635 uint32_t f = flags; 2636 if (f & MachO::MH_NOUNDEFS) { 2637 outs() << " NOUNDEFS"; 2638 f &= ~MachO::MH_NOUNDEFS; 2639 } 2640 if (f & MachO::MH_INCRLINK) { 2641 outs() << " INCRLINK"; 2642 f &= ~MachO::MH_INCRLINK; 2643 } 2644 if (f & MachO::MH_DYLDLINK) { 2645 outs() << " DYLDLINK"; 2646 f &= ~MachO::MH_DYLDLINK; 2647 } 2648 if (f & MachO::MH_BINDATLOAD) { 2649 outs() << " BINDATLOAD"; 2650 f &= ~MachO::MH_BINDATLOAD; 2651 } 2652 if (f & MachO::MH_PREBOUND) { 2653 outs() << " PREBOUND"; 2654 f &= ~MachO::MH_PREBOUND; 2655 } 2656 if (f & MachO::MH_SPLIT_SEGS) { 2657 outs() << " SPLIT_SEGS"; 2658 f &= ~MachO::MH_SPLIT_SEGS; 2659 } 2660 if (f & MachO::MH_LAZY_INIT) { 2661 outs() << " LAZY_INIT"; 2662 f &= ~MachO::MH_LAZY_INIT; 2663 } 2664 if (f & MachO::MH_TWOLEVEL) { 2665 outs() << " TWOLEVEL"; 2666 f &= ~MachO::MH_TWOLEVEL; 2667 } 2668 if (f & MachO::MH_FORCE_FLAT) { 2669 outs() << " FORCE_FLAT"; 2670 f &= ~MachO::MH_FORCE_FLAT; 2671 } 2672 if (f & MachO::MH_NOMULTIDEFS) { 2673 outs() << " NOMULTIDEFS"; 2674 f &= ~MachO::MH_NOMULTIDEFS; 2675 } 2676 if (f & MachO::MH_NOFIXPREBINDING) { 2677 outs() << " NOFIXPREBINDING"; 2678 f &= ~MachO::MH_NOFIXPREBINDING; 2679 } 2680 if (f & MachO::MH_PREBINDABLE) { 2681 outs() << " PREBINDABLE"; 2682 f &= ~MachO::MH_PREBINDABLE; 2683 } 2684 if (f & MachO::MH_ALLMODSBOUND) { 2685 outs() << " ALLMODSBOUND"; 2686 f &= ~MachO::MH_ALLMODSBOUND; 2687 } 2688 if (f & MachO::MH_SUBSECTIONS_VIA_SYMBOLS) { 2689 outs() << " SUBSECTIONS_VIA_SYMBOLS"; 2690 f &= ~MachO::MH_SUBSECTIONS_VIA_SYMBOLS; 2691 } 2692 if (f & MachO::MH_CANONICAL) { 2693 outs() << " CANONICAL"; 2694 f &= ~MachO::MH_CANONICAL; 2695 } 2696 if (f & MachO::MH_WEAK_DEFINES) { 2697 outs() << " WEAK_DEFINES"; 2698 f &= ~MachO::MH_WEAK_DEFINES; 2699 } 2700 if (f & MachO::MH_BINDS_TO_WEAK) { 2701 outs() << " BINDS_TO_WEAK"; 2702 f &= ~MachO::MH_BINDS_TO_WEAK; 2703 } 2704 if (f & MachO::MH_ALLOW_STACK_EXECUTION) { 2705 outs() << " ALLOW_STACK_EXECUTION"; 2706 f &= ~MachO::MH_ALLOW_STACK_EXECUTION; 2707 } 2708 if (f & MachO::MH_DEAD_STRIPPABLE_DYLIB) { 2709 outs() << " DEAD_STRIPPABLE_DYLIB"; 2710 f &= ~MachO::MH_DEAD_STRIPPABLE_DYLIB; 2711 } 2712 if (f & MachO::MH_PIE) { 2713 outs() << " PIE"; 2714 f &= ~MachO::MH_PIE; 2715 } 2716 if (f & MachO::MH_NO_REEXPORTED_DYLIBS) { 2717 outs() << " NO_REEXPORTED_DYLIBS"; 2718 f &= ~MachO::MH_NO_REEXPORTED_DYLIBS; 2719 } 2720 if (f & MachO::MH_HAS_TLV_DESCRIPTORS) { 2721 outs() << " MH_HAS_TLV_DESCRIPTORS"; 2722 f &= ~MachO::MH_HAS_TLV_DESCRIPTORS; 2723 } 2724 if (f & MachO::MH_NO_HEAP_EXECUTION) { 2725 outs() << " MH_NO_HEAP_EXECUTION"; 2726 f &= ~MachO::MH_NO_HEAP_EXECUTION; 2727 } 2728 if (f & MachO::MH_APP_EXTENSION_SAFE) { 2729 outs() << " APP_EXTENSION_SAFE"; 2730 f &= ~MachO::MH_APP_EXTENSION_SAFE; 2731 } 2732 if (f != 0 || flags == 0) 2733 outs() << format(" 0x%08" PRIx32, f); 2734 } else { 2735 outs() << format(" 0x%08" PRIx32, magic); 2736 outs() << format(" %7d", cputype); 2737 outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK); 2738 outs() << format(" 0x%02" PRIx32, 2739 (cpusubtype & MachO::CPU_SUBTYPE_MASK) >> 24); 2740 outs() << format(" %10u", filetype); 2741 outs() << format(" %5u", ncmds); 2742 outs() << format(" %10u", sizeofcmds); 2743 outs() << format(" 0x%08" PRIx32, flags); 2744 } 2745 outs() << "\n"; 2746} 2747 2748static void PrintSegmentCommand(uint32_t cmd, uint32_t cmdsize, 2749 StringRef SegName, uint64_t vmaddr, 2750 uint64_t vmsize, uint64_t fileoff, 2751 uint64_t filesize, uint32_t maxprot, 2752 uint32_t initprot, uint32_t nsects, 2753 uint32_t flags, uint32_t object_size, 2754 bool verbose) { 2755 uint64_t expected_cmdsize; 2756 if (cmd == MachO::LC_SEGMENT) { 2757 outs() << " cmd LC_SEGMENT\n"; 2758 expected_cmdsize = nsects; 2759 expected_cmdsize *= sizeof(struct MachO::section); 2760 expected_cmdsize += sizeof(struct MachO::segment_command); 2761 } else { 2762 outs() << " cmd LC_SEGMENT_64\n"; 2763 expected_cmdsize = nsects; 2764 expected_cmdsize *= sizeof(struct MachO::section_64); 2765 expected_cmdsize += sizeof(struct MachO::segment_command_64); 2766 } 2767 outs() << " cmdsize " << cmdsize; 2768 if (cmdsize != expected_cmdsize) 2769 outs() << " Inconsistent size\n"; 2770 else 2771 outs() << "\n"; 2772 outs() << " segname " << SegName << "\n"; 2773 if (cmd == MachO::LC_SEGMENT_64) { 2774 outs() << " vmaddr " << format("0x%016" PRIx64, vmaddr) << "\n"; 2775 outs() << " vmsize " << format("0x%016" PRIx64, vmsize) << "\n"; 2776 } else { 2777 outs() << " vmaddr " << format("0x%08" PRIx32, vmaddr) << "\n"; 2778 outs() << " vmsize " << format("0x%08" PRIx32, vmsize) << "\n"; 2779 } 2780 outs() << " fileoff " << fileoff; 2781 if (fileoff > object_size) 2782 outs() << " (past end of file)\n"; 2783 else 2784 outs() << "\n"; 2785 outs() << " filesize " << filesize; 2786 if (fileoff + filesize > object_size) 2787 outs() << " (past end of file)\n"; 2788 else 2789 outs() << "\n"; 2790 if (verbose) { 2791 if ((maxprot & 2792 ~(MachO::VM_PROT_READ | MachO::VM_PROT_WRITE | 2793 MachO::VM_PROT_EXECUTE)) != 0) 2794 outs() << " maxprot ?" << format("0x%08" PRIx32, maxprot) << "\n"; 2795 else { 2796 if (maxprot & MachO::VM_PROT_READ) 2797 outs() << " maxprot r"; 2798 else 2799 outs() << " maxprot -"; 2800 if (maxprot & MachO::VM_PROT_WRITE) 2801 outs() << "w"; 2802 else 2803 outs() << "-"; 2804 if (maxprot & MachO::VM_PROT_EXECUTE) 2805 outs() << "x\n"; 2806 else 2807 outs() << "-\n"; 2808 } 2809 if ((initprot & 2810 ~(MachO::VM_PROT_READ | MachO::VM_PROT_WRITE | 2811 MachO::VM_PROT_EXECUTE)) != 0) 2812 outs() << " initprot ?" << format("0x%08" PRIx32, initprot) << "\n"; 2813 else { 2814 if (initprot & MachO::VM_PROT_READ) 2815 outs() << " initprot r"; 2816 else 2817 outs() << " initprot -"; 2818 if (initprot & MachO::VM_PROT_WRITE) 2819 outs() << "w"; 2820 else 2821 outs() << "-"; 2822 if (initprot & MachO::VM_PROT_EXECUTE) 2823 outs() << "x\n"; 2824 else 2825 outs() << "-\n"; 2826 } 2827 } else { 2828 outs() << " maxprot " << format("0x%08" PRIx32, maxprot) << "\n"; 2829 outs() << " initprot " << format("0x%08" PRIx32, initprot) << "\n"; 2830 } 2831 outs() << " nsects " << nsects << "\n"; 2832 if (verbose) { 2833 outs() << " flags"; 2834 if (flags == 0) 2835 outs() << " (none)\n"; 2836 else { 2837 if (flags & MachO::SG_HIGHVM) { 2838 outs() << " HIGHVM"; 2839 flags &= ~MachO::SG_HIGHVM; 2840 } 2841 if (flags & MachO::SG_FVMLIB) { 2842 outs() << " FVMLIB"; 2843 flags &= ~MachO::SG_FVMLIB; 2844 } 2845 if (flags & MachO::SG_NORELOC) { 2846 outs() << " NORELOC"; 2847 flags &= ~MachO::SG_NORELOC; 2848 } 2849 if (flags & MachO::SG_PROTECTED_VERSION_1) { 2850 outs() << " PROTECTED_VERSION_1"; 2851 flags &= ~MachO::SG_PROTECTED_VERSION_1; 2852 } 2853 if (flags) 2854 outs() << format(" 0x%08" PRIx32, flags) << " (unknown flags)\n"; 2855 else 2856 outs() << "\n"; 2857 } 2858 } else { 2859 outs() << " flags " << format("0x%" PRIx32, flags) << "\n"; 2860 } 2861} 2862 2863static void PrintSection(const char *sectname, const char *segname, 2864 uint64_t addr, uint64_t size, uint32_t offset, 2865 uint32_t align, uint32_t reloff, uint32_t nreloc, 2866 uint32_t flags, uint32_t reserved1, uint32_t reserved2, 2867 uint32_t cmd, const char *sg_segname, 2868 uint32_t filetype, uint32_t object_size, 2869 bool verbose) { 2870 outs() << "Section\n"; 2871 outs() << " sectname " << format("%.16s\n", sectname); 2872 outs() << " segname " << format("%.16s", segname); 2873 if (filetype != MachO::MH_OBJECT && strncmp(sg_segname, segname, 16) != 0) 2874 outs() << " (does not match segment)\n"; 2875 else 2876 outs() << "\n"; 2877 if (cmd == MachO::LC_SEGMENT_64) { 2878 outs() << " addr " << format("0x%016" PRIx64, addr) << "\n"; 2879 outs() << " size " << format("0x%016" PRIx64, size); 2880 } else { 2881 outs() << " addr " << format("0x%08" PRIx32, addr) << "\n"; 2882 outs() << " size " << format("0x%08" PRIx32, size); 2883 } 2884 if ((flags & MachO::S_ZEROFILL) != 0 && offset + size > object_size) 2885 outs() << " (past end of file)\n"; 2886 else 2887 outs() << "\n"; 2888 outs() << " offset " << offset; 2889 if (offset > object_size) 2890 outs() << " (past end of file)\n"; 2891 else 2892 outs() << "\n"; 2893 uint32_t align_shifted = 1 << align; 2894 outs() << " align 2^" << align << " (" << align_shifted << ")\n"; 2895 outs() << " reloff " << reloff; 2896 if (reloff > object_size) 2897 outs() << " (past end of file)\n"; 2898 else 2899 outs() << "\n"; 2900 outs() << " nreloc " << nreloc; 2901 if (reloff + nreloc * sizeof(struct MachO::relocation_info) > object_size) 2902 outs() << " (past end of file)\n"; 2903 else 2904 outs() << "\n"; 2905 uint32_t section_type = flags & MachO::SECTION_TYPE; 2906 if (verbose) { 2907 outs() << " type"; 2908 if (section_type == MachO::S_REGULAR) 2909 outs() << " S_REGULAR\n"; 2910 else if (section_type == MachO::S_ZEROFILL) 2911 outs() << " S_ZEROFILL\n"; 2912 else if (section_type == MachO::S_CSTRING_LITERALS) 2913 outs() << " S_CSTRING_LITERALS\n"; 2914 else if (section_type == MachO::S_4BYTE_LITERALS) 2915 outs() << " S_4BYTE_LITERALS\n"; 2916 else if (section_type == MachO::S_8BYTE_LITERALS) 2917 outs() << " S_8BYTE_LITERALS\n"; 2918 else if (section_type == MachO::S_16BYTE_LITERALS) 2919 outs() << " S_16BYTE_LITERALS\n"; 2920 else if (section_type == MachO::S_LITERAL_POINTERS) 2921 outs() << " S_LITERAL_POINTERS\n"; 2922 else if (section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS) 2923 outs() << " S_NON_LAZY_SYMBOL_POINTERS\n"; 2924 else if (section_type == MachO::S_LAZY_SYMBOL_POINTERS) 2925 outs() << " S_LAZY_SYMBOL_POINTERS\n"; 2926 else if (section_type == MachO::S_SYMBOL_STUBS) 2927 outs() << " S_SYMBOL_STUBS\n"; 2928 else if (section_type == MachO::S_MOD_INIT_FUNC_POINTERS) 2929 outs() << " S_MOD_INIT_FUNC_POINTERS\n"; 2930 else if (section_type == MachO::S_MOD_TERM_FUNC_POINTERS) 2931 outs() << " S_MOD_TERM_FUNC_POINTERS\n"; 2932 else if (section_type == MachO::S_COALESCED) 2933 outs() << " S_COALESCED\n"; 2934 else if (section_type == MachO::S_INTERPOSING) 2935 outs() << " S_INTERPOSING\n"; 2936 else if (section_type == MachO::S_DTRACE_DOF) 2937 outs() << " S_DTRACE_DOF\n"; 2938 else if (section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS) 2939 outs() << " S_LAZY_DYLIB_SYMBOL_POINTERS\n"; 2940 else if (section_type == MachO::S_THREAD_LOCAL_REGULAR) 2941 outs() << " S_THREAD_LOCAL_REGULAR\n"; 2942 else if (section_type == MachO::S_THREAD_LOCAL_ZEROFILL) 2943 outs() << " S_THREAD_LOCAL_ZEROFILL\n"; 2944 else if (section_type == MachO::S_THREAD_LOCAL_VARIABLES) 2945 outs() << " S_THREAD_LOCAL_VARIABLES\n"; 2946 else if (section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS) 2947 outs() << " S_THREAD_LOCAL_VARIABLE_POINTERS\n"; 2948 else if (section_type == MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS) 2949 outs() << " S_THREAD_LOCAL_INIT_FUNCTION_POINTERS\n"; 2950 else 2951 outs() << format("0x%08" PRIx32, section_type) << "\n"; 2952 outs() << "attributes"; 2953 uint32_t section_attributes = flags & MachO::SECTION_ATTRIBUTES; 2954 if (section_attributes & MachO::S_ATTR_PURE_INSTRUCTIONS) 2955 outs() << " PURE_INSTRUCTIONS"; 2956 if (section_attributes & MachO::S_ATTR_NO_TOC) 2957 outs() << " NO_TOC"; 2958 if (section_attributes & MachO::S_ATTR_STRIP_STATIC_SYMS) 2959 outs() << " STRIP_STATIC_SYMS"; 2960 if (section_attributes & MachO::S_ATTR_NO_DEAD_STRIP) 2961 outs() << " NO_DEAD_STRIP"; 2962 if (section_attributes & MachO::S_ATTR_LIVE_SUPPORT) 2963 outs() << " LIVE_SUPPORT"; 2964 if (section_attributes & MachO::S_ATTR_SELF_MODIFYING_CODE) 2965 outs() << " SELF_MODIFYING_CODE"; 2966 if (section_attributes & MachO::S_ATTR_DEBUG) 2967 outs() << " DEBUG"; 2968 if (section_attributes & MachO::S_ATTR_SOME_INSTRUCTIONS) 2969 outs() << " SOME_INSTRUCTIONS"; 2970 if (section_attributes & MachO::S_ATTR_EXT_RELOC) 2971 outs() << " EXT_RELOC"; 2972 if (section_attributes & MachO::S_ATTR_LOC_RELOC) 2973 outs() << " LOC_RELOC"; 2974 if (section_attributes == 0) 2975 outs() << " (none)"; 2976 outs() << "\n"; 2977 } else 2978 outs() << " flags " << format("0x%08" PRIx32, flags) << "\n"; 2979 outs() << " reserved1 " << reserved1; 2980 if (section_type == MachO::S_SYMBOL_STUBS || 2981 section_type == MachO::S_LAZY_SYMBOL_POINTERS || 2982 section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS || 2983 section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS || 2984 section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS) 2985 outs() << " (index into indirect symbol table)\n"; 2986 else 2987 outs() << "\n"; 2988 outs() << " reserved2 " << reserved2; 2989 if (section_type == MachO::S_SYMBOL_STUBS) 2990 outs() << " (size of stubs)\n"; 2991 else 2992 outs() << "\n"; 2993} 2994 2995static void PrintSymtabLoadCommand(MachO::symtab_command st, bool Is64Bit, 2996 uint32_t object_size) { 2997 outs() << " cmd LC_SYMTAB\n"; 2998 outs() << " cmdsize " << st.cmdsize; 2999 if (st.cmdsize != sizeof(struct MachO::symtab_command)) 3000 outs() << " Incorrect size\n"; 3001 else 3002 outs() << "\n"; 3003 outs() << " symoff " << st.symoff; 3004 if (st.symoff > object_size) 3005 outs() << " (past end of file)\n"; 3006 else 3007 outs() << "\n"; 3008 outs() << " nsyms " << st.nsyms; 3009 uint64_t big_size; 3010 if (Is64Bit) { 3011 big_size = st.nsyms; 3012 big_size *= sizeof(struct MachO::nlist_64); 3013 big_size += st.symoff; 3014 if (big_size > object_size) 3015 outs() << " (past end of file)\n"; 3016 else 3017 outs() << "\n"; 3018 } else { 3019 big_size = st.nsyms; 3020 big_size *= sizeof(struct MachO::nlist); 3021 big_size += st.symoff; 3022 if (big_size > object_size) 3023 outs() << " (past end of file)\n"; 3024 else 3025 outs() << "\n"; 3026 } 3027 outs() << " stroff " << st.stroff; 3028 if (st.stroff > object_size) 3029 outs() << " (past end of file)\n"; 3030 else 3031 outs() << "\n"; 3032 outs() << " strsize " << st.strsize; 3033 big_size = st.stroff; 3034 big_size += st.strsize; 3035 if (big_size > object_size) 3036 outs() << " (past end of file)\n"; 3037 else 3038 outs() << "\n"; 3039} 3040 3041static void PrintDysymtabLoadCommand(MachO::dysymtab_command dyst, 3042 uint32_t nsyms, uint32_t object_size, 3043 bool Is64Bit) { 3044 outs() << " cmd LC_DYSYMTAB\n"; 3045 outs() << " cmdsize " << dyst.cmdsize; 3046 if (dyst.cmdsize != sizeof(struct MachO::dysymtab_command)) 3047 outs() << " Incorrect size\n"; 3048 else 3049 outs() << "\n"; 3050 outs() << " ilocalsym " << dyst.ilocalsym; 3051 if (dyst.ilocalsym > nsyms) 3052 outs() << " (greater than the number of symbols)\n"; 3053 else 3054 outs() << "\n"; 3055 outs() << " nlocalsym " << dyst.nlocalsym; 3056 uint64_t big_size; 3057 big_size = dyst.ilocalsym; 3058 big_size += dyst.nlocalsym; 3059 if (big_size > nsyms) 3060 outs() << " (past the end of the symbol table)\n"; 3061 else 3062 outs() << "\n"; 3063 outs() << " iextdefsym " << dyst.iextdefsym; 3064 if (dyst.iextdefsym > nsyms) 3065 outs() << " (greater than the number of symbols)\n"; 3066 else 3067 outs() << "\n"; 3068 outs() << " nextdefsym " << dyst.nextdefsym; 3069 big_size = dyst.iextdefsym; 3070 big_size += dyst.nextdefsym; 3071 if (big_size > nsyms) 3072 outs() << " (past the end of the symbol table)\n"; 3073 else 3074 outs() << "\n"; 3075 outs() << " iundefsym " << dyst.iundefsym; 3076 if (dyst.iundefsym > nsyms) 3077 outs() << " (greater than the number of symbols)\n"; 3078 else 3079 outs() << "\n"; 3080 outs() << " nundefsym " << dyst.nundefsym; 3081 big_size = dyst.iundefsym; 3082 big_size += dyst.nundefsym; 3083 if (big_size > nsyms) 3084 outs() << " (past the end of the symbol table)\n"; 3085 else 3086 outs() << "\n"; 3087 outs() << " tocoff " << dyst.tocoff; 3088 if (dyst.tocoff > object_size) 3089 outs() << " (past end of file)\n"; 3090 else 3091 outs() << "\n"; 3092 outs() << " ntoc " << dyst.ntoc; 3093 big_size = dyst.ntoc; 3094 big_size *= sizeof(struct MachO::dylib_table_of_contents); 3095 big_size += dyst.tocoff; 3096 if (big_size > object_size) 3097 outs() << " (past end of file)\n"; 3098 else 3099 outs() << "\n"; 3100 outs() << " modtaboff " << dyst.modtaboff; 3101 if (dyst.modtaboff > object_size) 3102 outs() << " (past end of file)\n"; 3103 else 3104 outs() << "\n"; 3105 outs() << " nmodtab " << dyst.nmodtab; 3106 uint64_t modtabend; 3107 if (Is64Bit) { 3108 modtabend = dyst.nmodtab; 3109 modtabend *= sizeof(struct MachO::dylib_module_64); 3110 modtabend += dyst.modtaboff; 3111 } else { 3112 modtabend = dyst.nmodtab; 3113 modtabend *= sizeof(struct MachO::dylib_module); 3114 modtabend += dyst.modtaboff; 3115 } 3116 if (modtabend > object_size) 3117 outs() << " (past end of file)\n"; 3118 else 3119 outs() << "\n"; 3120 outs() << " extrefsymoff " << dyst.extrefsymoff; 3121 if (dyst.extrefsymoff > object_size) 3122 outs() << " (past end of file)\n"; 3123 else 3124 outs() << "\n"; 3125 outs() << " nextrefsyms " << dyst.nextrefsyms; 3126 big_size = dyst.nextrefsyms; 3127 big_size *= sizeof(struct MachO::dylib_reference); 3128 big_size += dyst.extrefsymoff; 3129 if (big_size > object_size) 3130 outs() << " (past end of file)\n"; 3131 else 3132 outs() << "\n"; 3133 outs() << " indirectsymoff " << dyst.indirectsymoff; 3134 if (dyst.indirectsymoff > object_size) 3135 outs() << " (past end of file)\n"; 3136 else 3137 outs() << "\n"; 3138 outs() << " nindirectsyms " << dyst.nindirectsyms; 3139 big_size = dyst.nindirectsyms; 3140 big_size *= sizeof(uint32_t); 3141 big_size += dyst.indirectsymoff; 3142 if (big_size > object_size) 3143 outs() << " (past end of file)\n"; 3144 else 3145 outs() << "\n"; 3146 outs() << " extreloff " << dyst.extreloff; 3147 if (dyst.extreloff > object_size) 3148 outs() << " (past end of file)\n"; 3149 else 3150 outs() << "\n"; 3151 outs() << " nextrel " << dyst.nextrel; 3152 big_size = dyst.nextrel; 3153 big_size *= sizeof(struct MachO::relocation_info); 3154 big_size += dyst.extreloff; 3155 if (big_size > object_size) 3156 outs() << " (past end of file)\n"; 3157 else 3158 outs() << "\n"; 3159 outs() << " locreloff " << dyst.locreloff; 3160 if (dyst.locreloff > object_size) 3161 outs() << " (past end of file)\n"; 3162 else 3163 outs() << "\n"; 3164 outs() << " nlocrel " << dyst.nlocrel; 3165 big_size = dyst.nlocrel; 3166 big_size *= sizeof(struct MachO::relocation_info); 3167 big_size += dyst.locreloff; 3168 if (big_size > object_size) 3169 outs() << " (past end of file)\n"; 3170 else 3171 outs() << "\n"; 3172} 3173 3174static void PrintDyldInfoLoadCommand(MachO::dyld_info_command dc, 3175 uint32_t object_size) { 3176 if (dc.cmd == MachO::LC_DYLD_INFO) 3177 outs() << " cmd LC_DYLD_INFO\n"; 3178 else 3179 outs() << " cmd LC_DYLD_INFO_ONLY\n"; 3180 outs() << " cmdsize " << dc.cmdsize; 3181 if (dc.cmdsize != sizeof(struct MachO::dyld_info_command)) 3182 outs() << " Incorrect size\n"; 3183 else 3184 outs() << "\n"; 3185 outs() << " rebase_off " << dc.rebase_off; 3186 if (dc.rebase_off > object_size) 3187 outs() << " (past end of file)\n"; 3188 else 3189 outs() << "\n"; 3190 outs() << " rebase_size " << dc.rebase_size; 3191 uint64_t big_size; 3192 big_size = dc.rebase_off; 3193 big_size += dc.rebase_size; 3194 if (big_size > object_size) 3195 outs() << " (past end of file)\n"; 3196 else 3197 outs() << "\n"; 3198 outs() << " bind_off " << dc.bind_off; 3199 if (dc.bind_off > object_size) 3200 outs() << " (past end of file)\n"; 3201 else 3202 outs() << "\n"; 3203 outs() << " bind_size " << dc.bind_size; 3204 big_size = dc.bind_off; 3205 big_size += dc.bind_size; 3206 if (big_size > object_size) 3207 outs() << " (past end of file)\n"; 3208 else 3209 outs() << "\n"; 3210 outs() << " weak_bind_off " << dc.weak_bind_off; 3211 if (dc.weak_bind_off > object_size) 3212 outs() << " (past end of file)\n"; 3213 else 3214 outs() << "\n"; 3215 outs() << " weak_bind_size " << dc.weak_bind_size; 3216 big_size = dc.weak_bind_off; 3217 big_size += dc.weak_bind_size; 3218 if (big_size > object_size) 3219 outs() << " (past end of file)\n"; 3220 else 3221 outs() << "\n"; 3222 outs() << " lazy_bind_off " << dc.lazy_bind_off; 3223 if (dc.lazy_bind_off > object_size) 3224 outs() << " (past end of file)\n"; 3225 else 3226 outs() << "\n"; 3227 outs() << " lazy_bind_size " << dc.lazy_bind_size; 3228 big_size = dc.lazy_bind_off; 3229 big_size += dc.lazy_bind_size; 3230 if (big_size > object_size) 3231 outs() << " (past end of file)\n"; 3232 else 3233 outs() << "\n"; 3234 outs() << " export_off " << dc.export_off; 3235 if (dc.export_off > object_size) 3236 outs() << " (past end of file)\n"; 3237 else 3238 outs() << "\n"; 3239 outs() << " export_size " << dc.export_size; 3240 big_size = dc.export_off; 3241 big_size += dc.export_size; 3242 if (big_size > object_size) 3243 outs() << " (past end of file)\n"; 3244 else 3245 outs() << "\n"; 3246} 3247 3248static void PrintDyldLoadCommand(MachO::dylinker_command dyld, 3249 const char *Ptr) { 3250 if (dyld.cmd == MachO::LC_ID_DYLINKER) 3251 outs() << " cmd LC_ID_DYLINKER\n"; 3252 else if (dyld.cmd == MachO::LC_LOAD_DYLINKER) 3253 outs() << " cmd LC_LOAD_DYLINKER\n"; 3254 else if (dyld.cmd == MachO::LC_DYLD_ENVIRONMENT) 3255 outs() << " cmd LC_DYLD_ENVIRONMENT\n"; 3256 else 3257 outs() << " cmd ?(" << dyld.cmd << ")\n"; 3258 outs() << " cmdsize " << dyld.cmdsize; 3259 if (dyld.cmdsize < sizeof(struct MachO::dylinker_command)) 3260 outs() << " Incorrect size\n"; 3261 else 3262 outs() << "\n"; 3263 if (dyld.name >= dyld.cmdsize) 3264 outs() << " name ?(bad offset " << dyld.name << ")\n"; 3265 else { 3266 const char *P = (const char *)(Ptr) + dyld.name; 3267 outs() << " name " << P << " (offset " << dyld.name << ")\n"; 3268 } 3269} 3270 3271static void PrintUuidLoadCommand(MachO::uuid_command uuid) { 3272 outs() << " cmd LC_UUID\n"; 3273 outs() << " cmdsize " << uuid.cmdsize; 3274 if (uuid.cmdsize != sizeof(struct MachO::uuid_command)) 3275 outs() << " Incorrect size\n"; 3276 else 3277 outs() << "\n"; 3278 outs() << " uuid "; 3279 outs() << format("%02" PRIX32, uuid.uuid[0]); 3280 outs() << format("%02" PRIX32, uuid.uuid[1]); 3281 outs() << format("%02" PRIX32, uuid.uuid[2]); 3282 outs() << format("%02" PRIX32, uuid.uuid[3]); 3283 outs() << "-"; 3284 outs() << format("%02" PRIX32, uuid.uuid[4]); 3285 outs() << format("%02" PRIX32, uuid.uuid[5]); 3286 outs() << "-"; 3287 outs() << format("%02" PRIX32, uuid.uuid[6]); 3288 outs() << format("%02" PRIX32, uuid.uuid[7]); 3289 outs() << "-"; 3290 outs() << format("%02" PRIX32, uuid.uuid[8]); 3291 outs() << format("%02" PRIX32, uuid.uuid[9]); 3292 outs() << "-"; 3293 outs() << format("%02" PRIX32, uuid.uuid[10]); 3294 outs() << format("%02" PRIX32, uuid.uuid[11]); 3295 outs() << format("%02" PRIX32, uuid.uuid[12]); 3296 outs() << format("%02" PRIX32, uuid.uuid[13]); 3297 outs() << format("%02" PRIX32, uuid.uuid[14]); 3298 outs() << format("%02" PRIX32, uuid.uuid[15]); 3299 outs() << "\n"; 3300} 3301 3302static void PrintVersionMinLoadCommand(MachO::version_min_command vd) { 3303 if (vd.cmd == MachO::LC_VERSION_MIN_MACOSX) 3304 outs() << " cmd LC_VERSION_MIN_MACOSX\n"; 3305 else if (vd.cmd == MachO::LC_VERSION_MIN_IPHONEOS) 3306 outs() << " cmd LC_VERSION_MIN_IPHONEOS\n"; 3307 else 3308 outs() << " cmd " << vd.cmd << " (?)\n"; 3309 outs() << " cmdsize " << vd.cmdsize; 3310 if (vd.cmdsize != sizeof(struct MachO::version_min_command)) 3311 outs() << " Incorrect size\n"; 3312 else 3313 outs() << "\n"; 3314 outs() << " version " << ((vd.version >> 16) & 0xffff) << "." 3315 << ((vd.version >> 8) & 0xff); 3316 if ((vd.version & 0xff) != 0) 3317 outs() << "." << (vd.version & 0xff); 3318 outs() << "\n"; 3319 if (vd.sdk == 0) 3320 outs() << " sdk n/a\n"; 3321 else { 3322 outs() << " sdk " << ((vd.sdk >> 16) & 0xffff) << "." 3323 << ((vd.sdk >> 8) & 0xff); 3324 } 3325 if ((vd.sdk & 0xff) != 0) 3326 outs() << "." << (vd.sdk & 0xff); 3327 outs() << "\n"; 3328} 3329 3330static void PrintSourceVersionCommand(MachO::source_version_command sd) { 3331 outs() << " cmd LC_SOURCE_VERSION\n"; 3332 outs() << " cmdsize " << sd.cmdsize; 3333 if (sd.cmdsize != sizeof(struct MachO::source_version_command)) 3334 outs() << " Incorrect size\n"; 3335 else 3336 outs() << "\n"; 3337 uint64_t a = (sd.version >> 40) & 0xffffff; 3338 uint64_t b = (sd.version >> 30) & 0x3ff; 3339 uint64_t c = (sd.version >> 20) & 0x3ff; 3340 uint64_t d = (sd.version >> 10) & 0x3ff; 3341 uint64_t e = sd.version & 0x3ff; 3342 outs() << " version " << a << "." << b; 3343 if (e != 0) 3344 outs() << "." << c << "." << d << "." << e; 3345 else if (d != 0) 3346 outs() << "." << c << "." << d; 3347 else if (c != 0) 3348 outs() << "." << c; 3349 outs() << "\n"; 3350} 3351 3352static void PrintEntryPointCommand(MachO::entry_point_command ep) { 3353 outs() << " cmd LC_MAIN\n"; 3354 outs() << " cmdsize " << ep.cmdsize; 3355 if (ep.cmdsize != sizeof(struct MachO::entry_point_command)) 3356 outs() << " Incorrect size\n"; 3357 else 3358 outs() << "\n"; 3359 outs() << " entryoff " << ep.entryoff << "\n"; 3360 outs() << " stacksize " << ep.stacksize << "\n"; 3361} 3362 3363static void PrintDylibCommand(MachO::dylib_command dl, const char *Ptr) { 3364 if (dl.cmd == MachO::LC_ID_DYLIB) 3365 outs() << " cmd LC_ID_DYLIB\n"; 3366 else if (dl.cmd == MachO::LC_LOAD_DYLIB) 3367 outs() << " cmd LC_LOAD_DYLIB\n"; 3368 else if (dl.cmd == MachO::LC_LOAD_WEAK_DYLIB) 3369 outs() << " cmd LC_LOAD_WEAK_DYLIB\n"; 3370 else if (dl.cmd == MachO::LC_REEXPORT_DYLIB) 3371 outs() << " cmd LC_REEXPORT_DYLIB\n"; 3372 else if (dl.cmd == MachO::LC_LAZY_LOAD_DYLIB) 3373 outs() << " cmd LC_LAZY_LOAD_DYLIB\n"; 3374 else if (dl.cmd == MachO::LC_LOAD_UPWARD_DYLIB) 3375 outs() << " cmd LC_LOAD_UPWARD_DYLIB\n"; 3376 else 3377 outs() << " cmd " << dl.cmd << " (unknown)\n"; 3378 outs() << " cmdsize " << dl.cmdsize; 3379 if (dl.cmdsize < sizeof(struct MachO::dylib_command)) 3380 outs() << " Incorrect size\n"; 3381 else 3382 outs() << "\n"; 3383 if (dl.dylib.name < dl.cmdsize) { 3384 const char *P = (const char *)(Ptr) + dl.dylib.name; 3385 outs() << " name " << P << " (offset " << dl.dylib.name << ")\n"; 3386 } else { 3387 outs() << " name ?(bad offset " << dl.dylib.name << ")\n"; 3388 } 3389 outs() << " time stamp " << dl.dylib.timestamp << " "; 3390 time_t t = dl.dylib.timestamp; 3391 outs() << ctime(&t); 3392 outs() << " current version "; 3393 if (dl.dylib.current_version == 0xffffffff) 3394 outs() << "n/a\n"; 3395 else 3396 outs() << ((dl.dylib.current_version >> 16) & 0xffff) << "." 3397 << ((dl.dylib.current_version >> 8) & 0xff) << "." 3398 << (dl.dylib.current_version & 0xff) << "\n"; 3399 outs() << "compatibility version "; 3400 if (dl.dylib.compatibility_version == 0xffffffff) 3401 outs() << "n/a\n"; 3402 else 3403 outs() << ((dl.dylib.compatibility_version >> 16) & 0xffff) << "." 3404 << ((dl.dylib.compatibility_version >> 8) & 0xff) << "." 3405 << (dl.dylib.compatibility_version & 0xff) << "\n"; 3406} 3407 3408static void PrintLinkEditDataCommand(MachO::linkedit_data_command ld, 3409 uint32_t object_size) { 3410 if (ld.cmd == MachO::LC_CODE_SIGNATURE) 3411 outs() << " cmd LC_FUNCTION_STARTS\n"; 3412 else if (ld.cmd == MachO::LC_SEGMENT_SPLIT_INFO) 3413 outs() << " cmd LC_SEGMENT_SPLIT_INFO\n"; 3414 else if (ld.cmd == MachO::LC_FUNCTION_STARTS) 3415 outs() << " cmd LC_FUNCTION_STARTS\n"; 3416 else if (ld.cmd == MachO::LC_DATA_IN_CODE) 3417 outs() << " cmd LC_DATA_IN_CODE\n"; 3418 else if (ld.cmd == MachO::LC_DYLIB_CODE_SIGN_DRS) 3419 outs() << " cmd LC_DYLIB_CODE_SIGN_DRS\n"; 3420 else if (ld.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT) 3421 outs() << " cmd LC_LINKER_OPTIMIZATION_HINT\n"; 3422 else 3423 outs() << " cmd " << ld.cmd << " (?)\n"; 3424 outs() << " cmdsize " << ld.cmdsize; 3425 if (ld.cmdsize != sizeof(struct MachO::linkedit_data_command)) 3426 outs() << " Incorrect size\n"; 3427 else 3428 outs() << "\n"; 3429 outs() << " dataoff " << ld.dataoff; 3430 if (ld.dataoff > object_size) 3431 outs() << " (past end of file)\n"; 3432 else 3433 outs() << "\n"; 3434 outs() << " datasize " << ld.datasize; 3435 uint64_t big_size = ld.dataoff; 3436 big_size += ld.datasize; 3437 if (big_size > object_size) 3438 outs() << " (past end of file)\n"; 3439 else 3440 outs() << "\n"; 3441} 3442 3443static void PrintLoadCommands(const MachOObjectFile *Obj, uint32_t ncmds, 3444 uint32_t filetype, uint32_t cputype, 3445 bool verbose) { 3446 StringRef Buf = Obj->getData(); 3447 MachOObjectFile::LoadCommandInfo Command = Obj->getFirstLoadCommandInfo(); 3448 for (unsigned i = 0;; ++i) { 3449 outs() << "Load command " << i << "\n"; 3450 if (Command.C.cmd == MachO::LC_SEGMENT) { 3451 MachO::segment_command SLC = Obj->getSegmentLoadCommand(Command); 3452 const char *sg_segname = SLC.segname; 3453 PrintSegmentCommand(SLC.cmd, SLC.cmdsize, SLC.segname, SLC.vmaddr, 3454 SLC.vmsize, SLC.fileoff, SLC.filesize, SLC.maxprot, 3455 SLC.initprot, SLC.nsects, SLC.flags, Buf.size(), 3456 verbose); 3457 for (unsigned j = 0; j < SLC.nsects; j++) { 3458 MachO::section_64 S = Obj->getSection64(Command, j); 3459 PrintSection(S.sectname, S.segname, S.addr, S.size, S.offset, S.align, 3460 S.reloff, S.nreloc, S.flags, S.reserved1, S.reserved2, 3461 SLC.cmd, sg_segname, filetype, Buf.size(), verbose); 3462 } 3463 } else if (Command.C.cmd == MachO::LC_SEGMENT_64) { 3464 MachO::segment_command_64 SLC_64 = Obj->getSegment64LoadCommand(Command); 3465 const char *sg_segname = SLC_64.segname; 3466 PrintSegmentCommand(SLC_64.cmd, SLC_64.cmdsize, SLC_64.segname, 3467 SLC_64.vmaddr, SLC_64.vmsize, SLC_64.fileoff, 3468 SLC_64.filesize, SLC_64.maxprot, SLC_64.initprot, 3469 SLC_64.nsects, SLC_64.flags, Buf.size(), verbose); 3470 for (unsigned j = 0; j < SLC_64.nsects; j++) { 3471 MachO::section_64 S_64 = Obj->getSection64(Command, j); 3472 PrintSection(S_64.sectname, S_64.segname, S_64.addr, S_64.size, 3473 S_64.offset, S_64.align, S_64.reloff, S_64.nreloc, 3474 S_64.flags, S_64.reserved1, S_64.reserved2, SLC_64.cmd, 3475 sg_segname, filetype, Buf.size(), verbose); 3476 } 3477 } else if (Command.C.cmd == MachO::LC_SYMTAB) { 3478 MachO::symtab_command Symtab = Obj->getSymtabLoadCommand(); 3479 PrintSymtabLoadCommand(Symtab, Obj->is64Bit(), Buf.size()); 3480 } else if (Command.C.cmd == MachO::LC_DYSYMTAB) { 3481 MachO::dysymtab_command Dysymtab = Obj->getDysymtabLoadCommand(); 3482 MachO::symtab_command Symtab = Obj->getSymtabLoadCommand(); 3483 PrintDysymtabLoadCommand(Dysymtab, Symtab.nsyms, Buf.size(), 3484 Obj->is64Bit()); 3485 } else if (Command.C.cmd == MachO::LC_DYLD_INFO || 3486 Command.C.cmd == MachO::LC_DYLD_INFO_ONLY) { 3487 MachO::dyld_info_command DyldInfo = Obj->getDyldInfoLoadCommand(Command); 3488 PrintDyldInfoLoadCommand(DyldInfo, Buf.size()); 3489 } else if (Command.C.cmd == MachO::LC_LOAD_DYLINKER || 3490 Command.C.cmd == MachO::LC_ID_DYLINKER || 3491 Command.C.cmd == MachO::LC_DYLD_ENVIRONMENT) { 3492 MachO::dylinker_command Dyld = Obj->getDylinkerCommand(Command); 3493 PrintDyldLoadCommand(Dyld, Command.Ptr); 3494 } else if (Command.C.cmd == MachO::LC_UUID) { 3495 MachO::uuid_command Uuid = Obj->getUuidCommand(Command); 3496 PrintUuidLoadCommand(Uuid); 3497 } else if (Command.C.cmd == MachO::LC_VERSION_MIN_MACOSX) { 3498 MachO::version_min_command Vd = Obj->getVersionMinLoadCommand(Command); 3499 PrintVersionMinLoadCommand(Vd); 3500 } else if (Command.C.cmd == MachO::LC_SOURCE_VERSION) { 3501 MachO::source_version_command Sd = Obj->getSourceVersionCommand(Command); 3502 PrintSourceVersionCommand(Sd); 3503 } else if (Command.C.cmd == MachO::LC_MAIN) { 3504 MachO::entry_point_command Ep = Obj->getEntryPointCommand(Command); 3505 PrintEntryPointCommand(Ep); 3506 } else if (Command.C.cmd == MachO::LC_LOAD_DYLIB || 3507 Command.C.cmd == MachO::LC_ID_DYLIB || 3508 Command.C.cmd == MachO::LC_LOAD_WEAK_DYLIB || 3509 Command.C.cmd == MachO::LC_REEXPORT_DYLIB || 3510 Command.C.cmd == MachO::LC_LAZY_LOAD_DYLIB || 3511 Command.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) { 3512 MachO::dylib_command Dl = Obj->getDylibIDLoadCommand(Command); 3513 PrintDylibCommand(Dl, Command.Ptr); 3514 } else if (Command.C.cmd == MachO::LC_CODE_SIGNATURE || 3515 Command.C.cmd == MachO::LC_SEGMENT_SPLIT_INFO || 3516 Command.C.cmd == MachO::LC_FUNCTION_STARTS || 3517 Command.C.cmd == MachO::LC_DATA_IN_CODE || 3518 Command.C.cmd == MachO::LC_DYLIB_CODE_SIGN_DRS || 3519 Command.C.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT) { 3520 MachO::linkedit_data_command Ld = 3521 Obj->getLinkeditDataLoadCommand(Command); 3522 PrintLinkEditDataCommand(Ld, Buf.size()); 3523 } else { 3524 outs() << " cmd ?(" << format("0x%08" PRIx32, Command.C.cmd) 3525 << ")\n"; 3526 outs() << " cmdsize " << Command.C.cmdsize << "\n"; 3527 // TODO: get and print the raw bytes of the load command. 3528 } 3529 // TODO: print all the other kinds of load commands. 3530 if (i == ncmds - 1) 3531 break; 3532 else 3533 Command = Obj->getNextLoadCommandInfo(Command); 3534 } 3535} 3536 3537static void getAndPrintMachHeader(const MachOObjectFile *Obj, uint32_t &ncmds, 3538 uint32_t &filetype, uint32_t &cputype, 3539 bool verbose) { 3540 if (Obj->is64Bit()) { 3541 MachO::mach_header_64 H_64; 3542 H_64 = Obj->getHeader64(); 3543 PrintMachHeader(H_64.magic, H_64.cputype, H_64.cpusubtype, H_64.filetype, 3544 H_64.ncmds, H_64.sizeofcmds, H_64.flags, verbose); 3545 ncmds = H_64.ncmds; 3546 filetype = H_64.filetype; 3547 cputype = H_64.cputype; 3548 } else { 3549 MachO::mach_header H; 3550 H = Obj->getHeader(); 3551 PrintMachHeader(H.magic, H.cputype, H.cpusubtype, H.filetype, H.ncmds, 3552 H.sizeofcmds, H.flags, verbose); 3553 ncmds = H.ncmds; 3554 filetype = H.filetype; 3555 cputype = H.cputype; 3556 } 3557} 3558 3559void llvm::printMachOFileHeader(const object::ObjectFile *Obj) { 3560 const MachOObjectFile *file = dyn_cast<const MachOObjectFile>(Obj); 3561 uint32_t ncmds = 0; 3562 uint32_t filetype = 0; 3563 uint32_t cputype = 0; 3564 getAndPrintMachHeader(file, ncmds, filetype, cputype, true); 3565 PrintLoadCommands(file, ncmds, filetype, cputype, true); 3566} 3567 3568//===----------------------------------------------------------------------===// 3569// export trie dumping 3570//===----------------------------------------------------------------------===// 3571 3572void llvm::printMachOExportsTrie(const object::MachOObjectFile *Obj) { 3573 for (const llvm::object::ExportEntry &Entry : Obj->exports()) { 3574 uint64_t Flags = Entry.flags(); 3575 bool ReExport = (Flags & MachO::EXPORT_SYMBOL_FLAGS_REEXPORT); 3576 bool WeakDef = (Flags & MachO::EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION); 3577 bool ThreadLocal = ((Flags & MachO::EXPORT_SYMBOL_FLAGS_KIND_MASK) == 3578 MachO::EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL); 3579 bool Abs = ((Flags & MachO::EXPORT_SYMBOL_FLAGS_KIND_MASK) == 3580 MachO::EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE); 3581 bool Resolver = (Flags & MachO::EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER); 3582 if (ReExport) 3583 outs() << "[re-export] "; 3584 else 3585 outs() << format("0x%08llX ", 3586 Entry.address()); // FIXME:add in base address 3587 outs() << Entry.name(); 3588 if (WeakDef || ThreadLocal || Resolver || Abs) { 3589 bool NeedsComma = false; 3590 outs() << " ["; 3591 if (WeakDef) { 3592 outs() << "weak_def"; 3593 NeedsComma = true; 3594 } 3595 if (ThreadLocal) { 3596 if (NeedsComma) 3597 outs() << ", "; 3598 outs() << "per-thread"; 3599 NeedsComma = true; 3600 } 3601 if (Abs) { 3602 if (NeedsComma) 3603 outs() << ", "; 3604 outs() << "absolute"; 3605 NeedsComma = true; 3606 } 3607 if (Resolver) { 3608 if (NeedsComma) 3609 outs() << ", "; 3610 outs() << format("resolver=0x%08llX", Entry.other()); 3611 NeedsComma = true; 3612 } 3613 outs() << "]"; 3614 } 3615 if (ReExport) { 3616 StringRef DylibName = "unknown"; 3617 int Ordinal = Entry.other() - 1; 3618 Obj->getLibraryShortNameByIndex(Ordinal, DylibName); 3619 if (Entry.otherName().empty()) 3620 outs() << " (from " << DylibName << ")"; 3621 else 3622 outs() << " (" << Entry.otherName() << " from " << DylibName << ")"; 3623 } 3624 outs() << "\n"; 3625 } 3626} 3627 3628//===----------------------------------------------------------------------===// 3629// rebase table dumping 3630//===----------------------------------------------------------------------===// 3631 3632namespace { 3633class SegInfo { 3634public: 3635 SegInfo(const object::MachOObjectFile *Obj); 3636 3637 StringRef segmentName(uint32_t SegIndex); 3638 StringRef sectionName(uint32_t SegIndex, uint64_t SegOffset); 3639 uint64_t address(uint32_t SegIndex, uint64_t SegOffset); 3640 3641private: 3642 struct SectionInfo { 3643 uint64_t Address; 3644 uint64_t Size; 3645 StringRef SectionName; 3646 StringRef SegmentName; 3647 uint64_t OffsetInSegment; 3648 uint64_t SegmentStartAddress; 3649 uint32_t SegmentIndex; 3650 }; 3651 const SectionInfo &findSection(uint32_t SegIndex, uint64_t SegOffset); 3652 SmallVector<SectionInfo, 32> Sections; 3653}; 3654} 3655 3656SegInfo::SegInfo(const object::MachOObjectFile *Obj) { 3657 // Build table of sections so segIndex/offset pairs can be translated. 3658 uint32_t CurSegIndex = Obj->hasPageZeroSegment() ? 1 : 0; 3659 StringRef CurSegName; 3660 uint64_t CurSegAddress; 3661 for (const SectionRef &Section : Obj->sections()) { 3662 SectionInfo Info; 3663 if (error(Section.getName(Info.SectionName))) 3664 return; 3665 Info.Address = Section.getAddress(); 3666 Info.Size = Section.getSize(); 3667 Info.SegmentName = 3668 Obj->getSectionFinalSegmentName(Section.getRawDataRefImpl()); 3669 if (!Info.SegmentName.equals(CurSegName)) { 3670 ++CurSegIndex; 3671 CurSegName = Info.SegmentName; 3672 CurSegAddress = Info.Address; 3673 } 3674 Info.SegmentIndex = CurSegIndex - 1; 3675 Info.OffsetInSegment = Info.Address - CurSegAddress; 3676 Info.SegmentStartAddress = CurSegAddress; 3677 Sections.push_back(Info); 3678 } 3679} 3680 3681StringRef SegInfo::segmentName(uint32_t SegIndex) { 3682 for (const SectionInfo &SI : Sections) { 3683 if (SI.SegmentIndex == SegIndex) 3684 return SI.SegmentName; 3685 } 3686 llvm_unreachable("invalid segIndex"); 3687} 3688 3689const SegInfo::SectionInfo &SegInfo::findSection(uint32_t SegIndex, 3690 uint64_t OffsetInSeg) { 3691 for (const SectionInfo &SI : Sections) { 3692 if (SI.SegmentIndex != SegIndex) 3693 continue; 3694 if (SI.OffsetInSegment > OffsetInSeg) 3695 continue; 3696 if (OffsetInSeg >= (SI.OffsetInSegment + SI.Size)) 3697 continue; 3698 return SI; 3699 } 3700 llvm_unreachable("segIndex and offset not in any section"); 3701} 3702 3703StringRef SegInfo::sectionName(uint32_t SegIndex, uint64_t OffsetInSeg) { 3704 return findSection(SegIndex, OffsetInSeg).SectionName; 3705} 3706 3707uint64_t SegInfo::address(uint32_t SegIndex, uint64_t OffsetInSeg) { 3708 const SectionInfo &SI = findSection(SegIndex, OffsetInSeg); 3709 return SI.SegmentStartAddress + OffsetInSeg; 3710} 3711 3712void llvm::printMachORebaseTable(const object::MachOObjectFile *Obj) { 3713 // Build table of sections so names can used in final output. 3714 SegInfo sectionTable(Obj); 3715 3716 outs() << "segment section address type\n"; 3717 for (const llvm::object::MachORebaseEntry &Entry : Obj->rebaseTable()) { 3718 uint32_t SegIndex = Entry.segmentIndex(); 3719 uint64_t OffsetInSeg = Entry.segmentOffset(); 3720 StringRef SegmentName = sectionTable.segmentName(SegIndex); 3721 StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg); 3722 uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); 3723 3724 // Table lines look like: __DATA __nl_symbol_ptr 0x0000F00C pointer 3725 outs() << format("%-8s %-18s 0x%08" PRIX64 " %s\n", 3726 SegmentName.str().c_str(), SectionName.str().c_str(), 3727 Address, Entry.typeName().str().c_str()); 3728 } 3729} 3730 3731static StringRef ordinalName(const object::MachOObjectFile *Obj, int Ordinal) { 3732 StringRef DylibName; 3733 switch (Ordinal) { 3734 case MachO::BIND_SPECIAL_DYLIB_SELF: 3735 return "this-image"; 3736 case MachO::BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE: 3737 return "main-executable"; 3738 case MachO::BIND_SPECIAL_DYLIB_FLAT_LOOKUP: 3739 return "flat-namespace"; 3740 default: 3741 if (Ordinal > 0) { 3742 std::error_code EC = 3743 Obj->getLibraryShortNameByIndex(Ordinal - 1, DylibName); 3744 if (EC) 3745 return "<<bad library ordinal>>"; 3746 return DylibName; 3747 } 3748 } 3749 return "<<unknown special ordinal>>"; 3750} 3751 3752//===----------------------------------------------------------------------===// 3753// bind table dumping 3754//===----------------------------------------------------------------------===// 3755 3756void llvm::printMachOBindTable(const object::MachOObjectFile *Obj) { 3757 // Build table of sections so names can used in final output. 3758 SegInfo sectionTable(Obj); 3759 3760 outs() << "segment section address type " 3761 "addend dylib symbol\n"; 3762 for (const llvm::object::MachOBindEntry &Entry : Obj->bindTable()) { 3763 uint32_t SegIndex = Entry.segmentIndex(); 3764 uint64_t OffsetInSeg = Entry.segmentOffset(); 3765 StringRef SegmentName = sectionTable.segmentName(SegIndex); 3766 StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg); 3767 uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); 3768 3769 // Table lines look like: 3770 // __DATA __got 0x00012010 pointer 0 libSystem ___stack_chk_guard 3771 StringRef Attr; 3772 if (Entry.flags() & MachO::BIND_SYMBOL_FLAGS_WEAK_IMPORT) 3773 Attr = " (weak_import)"; 3774 outs() << left_justify(SegmentName, 8) << " " 3775 << left_justify(SectionName, 18) << " " 3776 << format_hex(Address, 10, true) << " " 3777 << left_justify(Entry.typeName(), 8) << " " 3778 << format_decimal(Entry.addend(), 8) << " " 3779 << left_justify(ordinalName(Obj, Entry.ordinal()), 16) << " " 3780 << Entry.symbolName() << Attr << "\n"; 3781 } 3782} 3783 3784//===----------------------------------------------------------------------===// 3785// lazy bind table dumping 3786//===----------------------------------------------------------------------===// 3787 3788void llvm::printMachOLazyBindTable(const object::MachOObjectFile *Obj) { 3789 // Build table of sections so names can used in final output. 3790 SegInfo sectionTable(Obj); 3791 3792 outs() << "segment section address " 3793 "dylib symbol\n"; 3794 for (const llvm::object::MachOBindEntry &Entry : Obj->lazyBindTable()) { 3795 uint32_t SegIndex = Entry.segmentIndex(); 3796 uint64_t OffsetInSeg = Entry.segmentOffset(); 3797 StringRef SegmentName = sectionTable.segmentName(SegIndex); 3798 StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg); 3799 uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); 3800 3801 // Table lines look like: 3802 // __DATA __got 0x00012010 libSystem ___stack_chk_guard 3803 outs() << left_justify(SegmentName, 8) << " " 3804 << left_justify(SectionName, 18) << " " 3805 << format_hex(Address, 10, true) << " " 3806 << left_justify(ordinalName(Obj, Entry.ordinal()), 16) << " " 3807 << Entry.symbolName() << "\n"; 3808 } 3809} 3810 3811//===----------------------------------------------------------------------===// 3812// weak bind table dumping 3813//===----------------------------------------------------------------------===// 3814 3815void llvm::printMachOWeakBindTable(const object::MachOObjectFile *Obj) { 3816 // Build table of sections so names can used in final output. 3817 SegInfo sectionTable(Obj); 3818 3819 outs() << "segment section address " 3820 "type addend symbol\n"; 3821 for (const llvm::object::MachOBindEntry &Entry : Obj->weakBindTable()) { 3822 // Strong symbols don't have a location to update. 3823 if (Entry.flags() & MachO::BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION) { 3824 outs() << " strong " 3825 << Entry.symbolName() << "\n"; 3826 continue; 3827 } 3828 uint32_t SegIndex = Entry.segmentIndex(); 3829 uint64_t OffsetInSeg = Entry.segmentOffset(); 3830 StringRef SegmentName = sectionTable.segmentName(SegIndex); 3831 StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg); 3832 uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); 3833 3834 // Table lines look like: 3835 // __DATA __data 0x00001000 pointer 0 _foo 3836 outs() << left_justify(SegmentName, 8) << " " 3837 << left_justify(SectionName, 18) << " " 3838 << format_hex(Address, 10, true) << " " 3839 << left_justify(Entry.typeName(), 8) << " " 3840 << format_decimal(Entry.addend(), 8) << " " << Entry.symbolName() 3841 << "\n"; 3842 } 3843} 3844 3845// get_dyld_bind_info_symbolname() is used for disassembly and passed an 3846// address, ReferenceValue, in the Mach-O file and looks in the dyld bind 3847// information for that address. If the address is found its binding symbol 3848// name is returned. If not nullptr is returned. 3849static const char *get_dyld_bind_info_symbolname(uint64_t ReferenceValue, 3850 struct DisassembleInfo *info) { 3851 if (info->bindtable == nullptr) { 3852 info->bindtable = new (BindTable); 3853 SegInfo sectionTable(info->O); 3854 for (const llvm::object::MachOBindEntry &Entry : info->O->bindTable()) { 3855 uint32_t SegIndex = Entry.segmentIndex(); 3856 uint64_t OffsetInSeg = Entry.segmentOffset(); 3857 uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg); 3858 const char *SymbolName = nullptr; 3859 StringRef name = Entry.symbolName(); 3860 if (!name.empty()) 3861 SymbolName = name.data(); 3862 info->bindtable->push_back(std::make_pair(Address, SymbolName)); 3863 } 3864 } 3865 for (bind_table_iterator BI = info->bindtable->begin(), 3866 BE = info->bindtable->end(); 3867 BI != BE; ++BI) { 3868 uint64_t Address = BI->first; 3869 if (ReferenceValue == Address) { 3870 const char *SymbolName = BI->second; 3871 return SymbolName; 3872 } 3873 } 3874 return nullptr; 3875} 3876