1 //===-- llvm-objdump.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 program is a utility that works like binutils "objdump", that is, it 11 // dumps out a plethora of information about an object file depending on the 12 // flags. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #include "llvm-objdump.h" 17 #include "MCFunction.h" 18 #include "llvm/ADT/OwningPtr.h" 19 #include "llvm/ADT/STLExtras.h" 20 #include "llvm/ADT/StringExtras.h" 21 #include "llvm/ADT/Triple.h" 22 #include "llvm/MC/MCAsmInfo.h" 23 #include "llvm/MC/MCDisassembler.h" 24 #include "llvm/MC/MCInst.h" 25 #include "llvm/MC/MCInstPrinter.h" 26 #include "llvm/MC/MCInstrInfo.h" 27 #include "llvm/MC/MCRegisterInfo.h" 28 #include "llvm/MC/MCSubtargetInfo.h" 29 #include "llvm/Object/Archive.h" 30 #include "llvm/Object/COFF.h" 31 #include "llvm/Object/MachO.h" 32 #include "llvm/Object/ObjectFile.h" 33 #include "llvm/Support/Casting.h" 34 #include "llvm/Support/CommandLine.h" 35 #include "llvm/Support/Debug.h" 36 #include "llvm/Support/FileSystem.h" 37 #include "llvm/Support/Format.h" 38 #include "llvm/Support/GraphWriter.h" 39 #include "llvm/Support/Host.h" 40 #include "llvm/Support/ManagedStatic.h" 41 #include "llvm/Support/MemoryBuffer.h" 42 #include "llvm/Support/MemoryObject.h" 43 #include "llvm/Support/PrettyStackTrace.h" 44 #include "llvm/Support/Signals.h" 45 #include "llvm/Support/SourceMgr.h" 46 #include "llvm/Support/TargetRegistry.h" 47 #include "llvm/Support/TargetSelect.h" 48 #include "llvm/Support/raw_ostream.h" 49 #include "llvm/Support/system_error.h" 50 #include <algorithm> 51 #include <cctype> 52 #include <cstring> 53 using namespace llvm; 54 using namespace object; 55 56 static cl::list<std::string> 57 InputFilenames(cl::Positional, cl::desc("<input object files>"),cl::ZeroOrMore); 58 59 static cl::opt<bool> 60 Disassemble("disassemble", 61 cl::desc("Display assembler mnemonics for the machine instructions")); 62 static cl::alias 63 Disassembled("d", cl::desc("Alias for --disassemble"), 64 cl::aliasopt(Disassemble)); 65 66 static cl::opt<bool> 67 Relocations("r", cl::desc("Display the relocation entries in the file")); 68 69 static cl::opt<bool> 70 SectionContents("s", cl::desc("Display the content of each section")); 71 72 static cl::opt<bool> 73 SymbolTable("t", cl::desc("Display the symbol table")); 74 75 static cl::opt<bool> 76 MachOOpt("macho", cl::desc("Use MachO specific object file parser")); 77 static cl::alias 78 MachOm("m", cl::desc("Alias for --macho"), cl::aliasopt(MachOOpt)); 79 80 cl::opt<std::string> 81 llvm::TripleName("triple", cl::desc("Target triple to disassemble for, " 82 "see -version for available targets")); 83 84 cl::opt<std::string> 85 llvm::ArchName("arch", cl::desc("Target arch to disassemble for, " 86 "see -version for available targets")); 87 88 static cl::opt<bool> 89 SectionHeaders("section-headers", cl::desc("Display summaries of the headers " 90 "for each section.")); 91 static cl::alias 92 SectionHeadersShort("headers", cl::desc("Alias for --section-headers"), 93 cl::aliasopt(SectionHeaders)); 94 static cl::alias 95 SectionHeadersShorter("h", cl::desc("Alias for --section-headers"), 96 cl::aliasopt(SectionHeaders)); 97 98 static cl::list<std::string> 99 MAttrs("mattr", 100 cl::CommaSeparated, 101 cl::desc("Target specific attributes"), 102 cl::value_desc("a1,+a2,-a3,...")); 103 104 static cl::opt<bool> 105 NoShowRawInsn("no-show-raw-insn", cl::desc("When disassembling instructions, " 106 "do not print the instruction bytes.")); 107 108 static cl::opt<bool> 109 UnwindInfo("unwind-info", cl::desc("Display unwind information")); 110 111 static cl::alias 112 UnwindInfoShort("u", cl::desc("Alias for --unwind-info"), 113 cl::aliasopt(UnwindInfo)); 114 115 static StringRef ToolName; 116 117 bool llvm::error(error_code ec) { 118 if (!ec) return false; 119 120 outs() << ToolName << ": error reading file: " << ec.message() << ".\n"; 121 outs().flush(); 122 return true; 123 } 124 125 static const Target *getTarget(const ObjectFile *Obj = NULL) { 126 // Figure out the target triple. 127 llvm::Triple TheTriple("unknown-unknown-unknown"); 128 if (TripleName.empty()) { 129 if (Obj) 130 TheTriple.setArch(Triple::ArchType(Obj->getArch())); 131 } else 132 TheTriple.setTriple(Triple::normalize(TripleName)); 133 134 // Get the target specific parser. 135 std::string Error; 136 const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple, 137 Error); 138 if (!TheTarget) { 139 errs() << ToolName << ": " << Error; 140 return 0; 141 } 142 143 // Update the triple name and return the found target. 144 TripleName = TheTriple.getTriple(); 145 return TheTarget; 146 } 147 148 void llvm::StringRefMemoryObject::anchor() { } 149 150 void llvm::DumpBytes(StringRef bytes) { 151 static const char hex_rep[] = "0123456789abcdef"; 152 // FIXME: The real way to do this is to figure out the longest instruction 153 // and align to that size before printing. I'll fix this when I get 154 // around to outputting relocations. 155 // 15 is the longest x86 instruction 156 // 3 is for the hex rep of a byte + a space. 157 // 1 is for the null terminator. 158 enum { OutputSize = (15 * 3) + 1 }; 159 char output[OutputSize]; 160 161 assert(bytes.size() <= 15 162 && "DumpBytes only supports instructions of up to 15 bytes"); 163 memset(output, ' ', sizeof(output)); 164 unsigned index = 0; 165 for (StringRef::iterator i = bytes.begin(), 166 e = bytes.end(); i != e; ++i) { 167 output[index] = hex_rep[(*i & 0xF0) >> 4]; 168 output[index + 1] = hex_rep[*i & 0xF]; 169 index += 3; 170 } 171 172 output[sizeof(output) - 1] = 0; 173 outs() << output; 174 } 175 176 bool llvm::RelocAddressLess(RelocationRef a, RelocationRef b) { 177 uint64_t a_addr, b_addr; 178 if (error(a.getAddress(a_addr))) return false; 179 if (error(b.getAddress(b_addr))) return false; 180 return a_addr < b_addr; 181 } 182 183 static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) { 184 const Target *TheTarget = getTarget(Obj); 185 // getTarget() will have already issued a diagnostic if necessary, so 186 // just bail here if it failed. 187 if (!TheTarget) 188 return; 189 190 // Package up features to be passed to target/subtarget 191 std::string FeaturesStr; 192 if (MAttrs.size()) { 193 SubtargetFeatures Features; 194 for (unsigned i = 0; i != MAttrs.size(); ++i) 195 Features.AddFeature(MAttrs[i]); 196 FeaturesStr = Features.getString(); 197 } 198 199 error_code ec; 200 for (section_iterator i = Obj->begin_sections(), 201 e = Obj->end_sections(); 202 i != e; i.increment(ec)) { 203 if (error(ec)) break; 204 bool text; 205 if (error(i->isText(text))) break; 206 if (!text) continue; 207 208 uint64_t SectionAddr; 209 if (error(i->getAddress(SectionAddr))) break; 210 211 // Make a list of all the symbols in this section. 212 std::vector<std::pair<uint64_t, StringRef> > Symbols; 213 for (symbol_iterator si = Obj->begin_symbols(), 214 se = Obj->end_symbols(); 215 si != se; si.increment(ec)) { 216 bool contains; 217 if (!error(i->containsSymbol(*si, contains)) && contains) { 218 uint64_t Address; 219 if (error(si->getAddress(Address))) break; 220 Address -= SectionAddr; 221 222 StringRef Name; 223 if (error(si->getName(Name))) break; 224 Symbols.push_back(std::make_pair(Address, Name)); 225 } 226 } 227 228 // Sort the symbols by address, just in case they didn't come in that way. 229 array_pod_sort(Symbols.begin(), Symbols.end()); 230 231 // Make a list of all the relocations for this section. 232 std::vector<RelocationRef> Rels; 233 if (InlineRelocs) { 234 for (relocation_iterator ri = i->begin_relocations(), 235 re = i->end_relocations(); 236 ri != re; ri.increment(ec)) { 237 if (error(ec)) break; 238 Rels.push_back(*ri); 239 } 240 } 241 242 // Sort relocations by address. 243 std::sort(Rels.begin(), Rels.end(), RelocAddressLess); 244 245 StringRef name; 246 if (error(i->getName(name))) break; 247 outs() << "Disassembly of section " << name << ':'; 248 249 // If the section has no symbols just insert a dummy one and disassemble 250 // the whole section. 251 if (Symbols.empty()) 252 Symbols.push_back(std::make_pair(0, name)); 253 254 // Set up disassembler. 255 OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName)); 256 257 if (!AsmInfo) { 258 errs() << "error: no assembly info for target " << TripleName << "\n"; 259 return; 260 } 261 262 OwningPtr<const MCSubtargetInfo> STI( 263 TheTarget->createMCSubtargetInfo(TripleName, "", FeaturesStr)); 264 265 if (!STI) { 266 errs() << "error: no subtarget info for target " << TripleName << "\n"; 267 return; 268 } 269 270 OwningPtr<const MCDisassembler> DisAsm( 271 TheTarget->createMCDisassembler(*STI)); 272 if (!DisAsm) { 273 errs() << "error: no disassembler for target " << TripleName << "\n"; 274 return; 275 } 276 277 OwningPtr<const MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName)); 278 if (!MRI) { 279 errs() << "error: no register info for target " << TripleName << "\n"; 280 return; 281 } 282 283 OwningPtr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo()); 284 if (!MII) { 285 errs() << "error: no instruction info for target " << TripleName << "\n"; 286 return; 287 } 288 289 int AsmPrinterVariant = AsmInfo->getAssemblerDialect(); 290 OwningPtr<MCInstPrinter> IP(TheTarget->createMCInstPrinter( 291 AsmPrinterVariant, *AsmInfo, *MII, *MRI, *STI)); 292 if (!IP) { 293 errs() << "error: no instruction printer for target " << TripleName 294 << '\n'; 295 return; 296 } 297 298 StringRef Bytes; 299 if (error(i->getContents(Bytes))) break; 300 StringRefMemoryObject memoryObject(Bytes); 301 uint64_t Size; 302 uint64_t Index; 303 uint64_t SectSize; 304 if (error(i->getSize(SectSize))) break; 305 306 std::vector<RelocationRef>::const_iterator rel_cur = Rels.begin(); 307 std::vector<RelocationRef>::const_iterator rel_end = Rels.end(); 308 // Disassemble symbol by symbol. 309 for (unsigned si = 0, se = Symbols.size(); si != se; ++si) { 310 uint64_t Start = Symbols[si].first; 311 uint64_t End; 312 // The end is either the size of the section or the beginning of the next 313 // symbol. 314 if (si == se - 1) 315 End = SectSize; 316 // Make sure this symbol takes up space. 317 else if (Symbols[si + 1].first != Start) 318 End = Symbols[si + 1].first - 1; 319 else 320 // This symbol has the same address as the next symbol. Skip it. 321 continue; 322 323 outs() << '\n' << Symbols[si].second << ":\n"; 324 325 #ifndef NDEBUG 326 raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls(); 327 #else 328 raw_ostream &DebugOut = nulls(); 329 #endif 330 331 for (Index = Start; Index < End; Index += Size) { 332 MCInst Inst; 333 334 if (DisAsm->getInstruction(Inst, Size, memoryObject, Index, 335 DebugOut, nulls())) { 336 outs() << format("%8" PRIx64 ":", SectionAddr + Index); 337 if (!NoShowRawInsn) { 338 outs() << "\t"; 339 DumpBytes(StringRef(Bytes.data() + Index, Size)); 340 } 341 IP->printInst(&Inst, outs(), ""); 342 outs() << "\n"; 343 } else { 344 errs() << ToolName << ": warning: invalid instruction encoding\n"; 345 if (Size == 0) 346 Size = 1; // skip illegible bytes 347 } 348 349 // Print relocation for instruction. 350 while (rel_cur != rel_end) { 351 bool hidden = false; 352 uint64_t addr; 353 SmallString<16> name; 354 SmallString<32> val; 355 356 // If this relocation is hidden, skip it. 357 if (error(rel_cur->getHidden(hidden))) goto skip_print_rel; 358 if (hidden) goto skip_print_rel; 359 360 if (error(rel_cur->getAddress(addr))) goto skip_print_rel; 361 // Stop when rel_cur's address is past the current instruction. 362 if (addr >= Index + Size) break; 363 if (error(rel_cur->getTypeName(name))) goto skip_print_rel; 364 if (error(rel_cur->getValueString(val))) goto skip_print_rel; 365 366 outs() << format("\t\t\t%8" PRIx64 ": ", SectionAddr + addr) << name 367 << "\t" << val << "\n"; 368 369 skip_print_rel: 370 ++rel_cur; 371 } 372 } 373 } 374 } 375 } 376 377 static void PrintRelocations(const ObjectFile *o) { 378 error_code ec; 379 for (section_iterator si = o->begin_sections(), se = o->end_sections(); 380 si != se; si.increment(ec)){ 381 if (error(ec)) return; 382 if (si->begin_relocations() == si->end_relocations()) 383 continue; 384 StringRef secname; 385 if (error(si->getName(secname))) continue; 386 outs() << "RELOCATION RECORDS FOR [" << secname << "]:\n"; 387 for (relocation_iterator ri = si->begin_relocations(), 388 re = si->end_relocations(); 389 ri != re; ri.increment(ec)) { 390 if (error(ec)) return; 391 392 bool hidden; 393 uint64_t address; 394 SmallString<32> relocname; 395 SmallString<32> valuestr; 396 if (error(ri->getHidden(hidden))) continue; 397 if (hidden) continue; 398 if (error(ri->getTypeName(relocname))) continue; 399 if (error(ri->getAddress(address))) continue; 400 if (error(ri->getValueString(valuestr))) continue; 401 outs() << address << " " << relocname << " " << valuestr << "\n"; 402 } 403 outs() << "\n"; 404 } 405 } 406 407 static void PrintSectionHeaders(const ObjectFile *o) { 408 outs() << "Sections:\n" 409 "Idx Name Size Address Type\n"; 410 error_code ec; 411 unsigned i = 0; 412 for (section_iterator si = o->begin_sections(), se = o->end_sections(); 413 si != se; si.increment(ec)) { 414 if (error(ec)) return; 415 StringRef Name; 416 if (error(si->getName(Name))) return; 417 uint64_t Address; 418 if (error(si->getAddress(Address))) return; 419 uint64_t Size; 420 if (error(si->getSize(Size))) return; 421 bool Text, Data, BSS; 422 if (error(si->isText(Text))) return; 423 if (error(si->isData(Data))) return; 424 if (error(si->isBSS(BSS))) return; 425 std::string Type = (std::string(Text ? "TEXT " : "") + 426 (Data ? "DATA " : "") + (BSS ? "BSS" : "")); 427 outs() << format("%3d %-13s %09" PRIx64 " %017" PRIx64 " %s\n", 428 i, Name.str().c_str(), Size, Address, Type.c_str()); 429 ++i; 430 } 431 } 432 433 static void PrintSectionContents(const ObjectFile *o) { 434 error_code ec; 435 for (section_iterator si = o->begin_sections(), 436 se = o->end_sections(); 437 si != se; si.increment(ec)) { 438 if (error(ec)) return; 439 StringRef Name; 440 StringRef Contents; 441 uint64_t BaseAddr; 442 if (error(si->getName(Name))) continue; 443 if (error(si->getContents(Contents))) continue; 444 if (error(si->getAddress(BaseAddr))) continue; 445 446 outs() << "Contents of section " << Name << ":\n"; 447 448 // Dump out the content as hex and printable ascii characters. 449 for (std::size_t addr = 0, end = Contents.size(); addr < end; addr += 16) { 450 outs() << format(" %04" PRIx64 " ", BaseAddr + addr); 451 // Dump line of hex. 452 for (std::size_t i = 0; i < 16; ++i) { 453 if (i != 0 && i % 4 == 0) 454 outs() << ' '; 455 if (addr + i < end) 456 outs() << hexdigit((Contents[addr + i] >> 4) & 0xF, true) 457 << hexdigit(Contents[addr + i] & 0xF, true); 458 else 459 outs() << " "; 460 } 461 // Print ascii. 462 outs() << " "; 463 for (std::size_t i = 0; i < 16 && addr + i < end; ++i) { 464 if (std::isprint(Contents[addr + i] & 0xFF)) 465 outs() << Contents[addr + i]; 466 else 467 outs() << "."; 468 } 469 outs() << "\n"; 470 } 471 } 472 } 473 474 static void PrintCOFFSymbolTable(const COFFObjectFile *coff) { 475 const coff_file_header *header; 476 if (error(coff->getHeader(header))) return; 477 int aux_count = 0; 478 const coff_symbol *symbol = 0; 479 for (int i = 0, e = header->NumberOfSymbols; i != e; ++i) { 480 if (aux_count--) { 481 // Figure out which type of aux this is. 482 if (symbol->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC 483 && symbol->Value == 0) { // Section definition. 484 const coff_aux_section_definition *asd; 485 if (error(coff->getAuxSymbol<coff_aux_section_definition>(i, asd))) 486 return; 487 outs() << "AUX " 488 << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x " 489 , unsigned(asd->Length) 490 , unsigned(asd->NumberOfRelocations) 491 , unsigned(asd->NumberOfLinenumbers) 492 , unsigned(asd->CheckSum)) 493 << format("assoc %d comdat %d\n" 494 , unsigned(asd->Number) 495 , unsigned(asd->Selection)); 496 } else 497 outs() << "AUX Unknown\n"; 498 } else { 499 StringRef name; 500 if (error(coff->getSymbol(i, symbol))) return; 501 if (error(coff->getSymbolName(symbol, name))) return; 502 outs() << "[" << format("%2d", i) << "]" 503 << "(sec " << format("%2d", int(symbol->SectionNumber)) << ")" 504 << "(fl 0x00)" // Flag bits, which COFF doesn't have. 505 << "(ty " << format("%3x", unsigned(symbol->Type)) << ")" 506 << "(scl " << format("%3x", unsigned(symbol->StorageClass)) << ") " 507 << "(nx " << unsigned(symbol->NumberOfAuxSymbols) << ") " 508 << "0x" << format("%08x", unsigned(symbol->Value)) << " " 509 << name << "\n"; 510 aux_count = symbol->NumberOfAuxSymbols; 511 } 512 } 513 } 514 515 static void PrintSymbolTable(const ObjectFile *o) { 516 outs() << "SYMBOL TABLE:\n"; 517 518 if (const COFFObjectFile *coff = dyn_cast<const COFFObjectFile>(o)) 519 PrintCOFFSymbolTable(coff); 520 else { 521 error_code ec; 522 for (symbol_iterator si = o->begin_symbols(), 523 se = o->end_symbols(); si != se; si.increment(ec)) { 524 if (error(ec)) return; 525 StringRef Name; 526 uint64_t Address; 527 SymbolRef::Type Type; 528 uint64_t Size; 529 uint32_t Flags; 530 section_iterator Section = o->end_sections(); 531 if (error(si->getName(Name))) continue; 532 if (error(si->getAddress(Address))) continue; 533 if (error(si->getFlags(Flags))) continue; 534 if (error(si->getType(Type))) continue; 535 if (error(si->getSize(Size))) continue; 536 if (error(si->getSection(Section))) continue; 537 538 bool Global = Flags & SymbolRef::SF_Global; 539 bool Weak = Flags & SymbolRef::SF_Weak; 540 bool Absolute = Flags & SymbolRef::SF_Absolute; 541 542 if (Address == UnknownAddressOrSize) 543 Address = 0; 544 if (Size == UnknownAddressOrSize) 545 Size = 0; 546 char GlobLoc = ' '; 547 if (Type != SymbolRef::ST_Unknown) 548 GlobLoc = Global ? 'g' : 'l'; 549 char Debug = (Type == SymbolRef::ST_Debug || Type == SymbolRef::ST_File) 550 ? 'd' : ' '; 551 char FileFunc = ' '; 552 if (Type == SymbolRef::ST_File) 553 FileFunc = 'f'; 554 else if (Type == SymbolRef::ST_Function) 555 FileFunc = 'F'; 556 557 outs() << format("%08" PRIx64, Address) << " " 558 << GlobLoc // Local -> 'l', Global -> 'g', Neither -> ' ' 559 << (Weak ? 'w' : ' ') // Weak? 560 << ' ' // Constructor. Not supported yet. 561 << ' ' // Warning. Not supported yet. 562 << ' ' // Indirect reference to another symbol. 563 << Debug // Debugging (d) or dynamic (D) symbol. 564 << FileFunc // Name of function (F), file (f) or object (O). 565 << ' '; 566 if (Absolute) 567 outs() << "*ABS*"; 568 else if (Section == o->end_sections()) 569 outs() << "*UND*"; 570 else { 571 if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(o)) { 572 StringRef SegmentName; 573 DataRefImpl DR = Section->getRawDataRefImpl(); 574 if (error(MachO->getSectionFinalSegmentName(DR, SegmentName))) 575 SegmentName = ""; 576 outs() << SegmentName << ","; 577 } 578 StringRef SectionName; 579 if (error(Section->getName(SectionName))) 580 SectionName = ""; 581 outs() << SectionName; 582 } 583 outs() << '\t' 584 << format("%08" PRIx64 " ", Size) 585 << Name 586 << '\n'; 587 } 588 } 589 } 590 591 static void PrintUnwindInfo(const ObjectFile *o) { 592 outs() << "Unwind info:\n\n"; 593 594 if (const COFFObjectFile *coff = dyn_cast<COFFObjectFile>(o)) { 595 printCOFFUnwindInfo(coff); 596 } else { 597 // TODO: Extract DWARF dump tool to objdump. 598 errs() << "This operation is only currently supported " 599 "for COFF object files.\n"; 600 return; 601 } 602 } 603 604 static void DumpObject(const ObjectFile *o) { 605 outs() << '\n'; 606 outs() << o->getFileName() 607 << ":\tfile format " << o->getFileFormatName() << "\n\n"; 608 609 if (Disassemble) 610 DisassembleObject(o, Relocations); 611 if (Relocations && !Disassemble) 612 PrintRelocations(o); 613 if (SectionHeaders) 614 PrintSectionHeaders(o); 615 if (SectionContents) 616 PrintSectionContents(o); 617 if (SymbolTable) 618 PrintSymbolTable(o); 619 if (UnwindInfo) 620 PrintUnwindInfo(o); 621 } 622 623 /// @brief Dump each object file in \a a; 624 static void DumpArchive(const Archive *a) { 625 for (Archive::child_iterator i = a->begin_children(), 626 e = a->end_children(); i != e; ++i) { 627 OwningPtr<Binary> child; 628 if (error_code ec = i->getAsBinary(child)) { 629 // Ignore non-object files. 630 if (ec != object_error::invalid_file_type) 631 errs() << ToolName << ": '" << a->getFileName() << "': " << ec.message() 632 << ".\n"; 633 continue; 634 } 635 if (ObjectFile *o = dyn_cast<ObjectFile>(child.get())) 636 DumpObject(o); 637 else 638 errs() << ToolName << ": '" << a->getFileName() << "': " 639 << "Unrecognized file type.\n"; 640 } 641 } 642 643 /// @brief Open file and figure out how to dump it. 644 static void DumpInput(StringRef file) { 645 // If file isn't stdin, check that it exists. 646 if (file != "-" && !sys::fs::exists(file)) { 647 errs() << ToolName << ": '" << file << "': " << "No such file\n"; 648 return; 649 } 650 651 if (MachOOpt && Disassemble) { 652 DisassembleInputMachO(file); 653 return; 654 } 655 656 // Attempt to open the binary. 657 OwningPtr<Binary> binary; 658 if (error_code ec = createBinary(file, binary)) { 659 errs() << ToolName << ": '" << file << "': " << ec.message() << ".\n"; 660 return; 661 } 662 663 if (Archive *a = dyn_cast<Archive>(binary.get())) 664 DumpArchive(a); 665 else if (ObjectFile *o = dyn_cast<ObjectFile>(binary.get())) 666 DumpObject(o); 667 else 668 errs() << ToolName << ": '" << file << "': " << "Unrecognized file type.\n"; 669 } 670 671 int main(int argc, char **argv) { 672 // Print a stack trace if we signal out. 673 sys::PrintStackTraceOnErrorSignal(); 674 PrettyStackTraceProgram X(argc, argv); 675 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 676 677 // Initialize targets and assembly printers/parsers. 678 llvm::InitializeAllTargetInfos(); 679 llvm::InitializeAllTargetMCs(); 680 llvm::InitializeAllAsmParsers(); 681 llvm::InitializeAllDisassemblers(); 682 683 // Register the target printer for --version. 684 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion); 685 686 cl::ParseCommandLineOptions(argc, argv, "llvm object file dumper\n"); 687 TripleName = Triple::normalize(TripleName); 688 689 ToolName = argv[0]; 690 691 // Defaults to a.out if no filenames specified. 692 if (InputFilenames.size() == 0) 693 InputFilenames.push_back("a.out"); 694 695 if (!Disassemble 696 && !Relocations 697 && !SectionHeaders 698 && !SectionContents 699 && !SymbolTable 700 && !UnwindInfo) { 701 cl::PrintHelpMessage(); 702 return 2; 703 } 704 705 std::for_each(InputFilenames.begin(), InputFilenames.end(), 706 DumpInput); 707 708 return 0; 709 } 710