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 // The flags and output of this program should be near identical to those of 15 // binutils objdump. 16 // 17 //===----------------------------------------------------------------------===// 18 19 #include "llvm-objdump.h" 20 #include "MCFunction.h" 21 #include "llvm/ADT/OwningPtr.h" 22 #include "llvm/ADT/STLExtras.h" 23 #include "llvm/ADT/StringExtras.h" 24 #include "llvm/ADT/Triple.h" 25 #include "llvm/MC/MCAsmInfo.h" 26 #include "llvm/MC/MCDisassembler.h" 27 #include "llvm/MC/MCInst.h" 28 #include "llvm/MC/MCInstPrinter.h" 29 #include "llvm/MC/MCInstrInfo.h" 30 #include "llvm/MC/MCRegisterInfo.h" 31 #include "llvm/MC/MCSubtargetInfo.h" 32 #include "llvm/Object/Archive.h" 33 #include "llvm/Object/COFF.h" 34 #include "llvm/Object/MachO.h" 35 #include "llvm/Object/ObjectFile.h" 36 #include "llvm/Support/Casting.h" 37 #include "llvm/Support/CommandLine.h" 38 #include "llvm/Support/Debug.h" 39 #include "llvm/Support/FileSystem.h" 40 #include "llvm/Support/Format.h" 41 #include "llvm/Support/GraphWriter.h" 42 #include "llvm/Support/Host.h" 43 #include "llvm/Support/ManagedStatic.h" 44 #include "llvm/Support/MemoryBuffer.h" 45 #include "llvm/Support/MemoryObject.h" 46 #include "llvm/Support/PrettyStackTrace.h" 47 #include "llvm/Support/Signals.h" 48 #include "llvm/Support/SourceMgr.h" 49 #include "llvm/Support/TargetRegistry.h" 50 #include "llvm/Support/TargetSelect.h" 51 #include "llvm/Support/raw_ostream.h" 52 #include "llvm/Support/system_error.h" 53 #include <algorithm> 54 #include <cctype> 55 #include <cstring> 56 using namespace llvm; 57 using namespace object; 58 59 static cl::list<std::string> 60 InputFilenames(cl::Positional, cl::desc("<input object files>"),cl::ZeroOrMore); 61 62 static cl::opt<bool> 63 Disassemble("disassemble", 64 cl::desc("Display assembler mnemonics for the machine instructions")); 65 static cl::alias 66 Disassembled("d", cl::desc("Alias for --disassemble"), 67 cl::aliasopt(Disassemble)); 68 69 static cl::opt<bool> 70 Relocations("r", cl::desc("Display the relocation entries in the file")); 71 72 static cl::opt<bool> 73 SectionContents("s", cl::desc("Display the content of each section")); 74 75 static cl::opt<bool> 76 SymbolTable("t", cl::desc("Display the symbol table")); 77 78 static cl::opt<bool> 79 MachOOpt("macho", cl::desc("Use MachO specific object file parser")); 80 static cl::alias 81 MachOm("m", cl::desc("Alias for --macho"), cl::aliasopt(MachOOpt)); 82 83 cl::opt<std::string> 84 llvm::TripleName("triple", cl::desc("Target triple to disassemble for, " 85 "see -version for available targets")); 86 87 cl::opt<std::string> 88 llvm::ArchName("arch", cl::desc("Target arch to disassemble for, " 89 "see -version for available targets")); 90 91 static cl::opt<bool> 92 SectionHeaders("section-headers", cl::desc("Display summaries of the headers " 93 "for each section.")); 94 static cl::alias 95 SectionHeadersShort("headers", cl::desc("Alias for --section-headers"), 96 cl::aliasopt(SectionHeaders)); 97 static cl::alias 98 SectionHeadersShorter("h", cl::desc("Alias for --section-headers"), 99 cl::aliasopt(SectionHeaders)); 100 101 static cl::list<std::string> 102 MAttrs("mattr", 103 cl::CommaSeparated, 104 cl::desc("Target specific attributes"), 105 cl::value_desc("a1,+a2,-a3,...")); 106 107 static cl::opt<bool> 108 NoShowRawInsn("no-show-raw-insn", cl::desc("When disassembling instructions, " 109 "do not print the instruction bytes.")); 110 111 static cl::opt<bool> 112 UnwindInfo("unwind-info", cl::desc("Display unwind information")); 113 114 static cl::alias 115 UnwindInfoShort("u", cl::desc("Alias for --unwind-info"), 116 cl::aliasopt(UnwindInfo)); 117 118 static cl::opt<bool> 119 PrivateHeaders("private-headers", 120 cl::desc("Display format specific file headers")); 121 122 static cl::alias 123 PrivateHeadersShort("p", cl::desc("Alias for --private-headers"), 124 cl::aliasopt(PrivateHeaders)); 125 126 static StringRef ToolName; 127 128 bool llvm::error(error_code ec) { 129 if (!ec) return false; 130 131 outs() << ToolName << ": error reading file: " << ec.message() << ".\n"; 132 outs().flush(); 133 return true; 134 } 135 136 static const Target *getTarget(const ObjectFile *Obj = NULL) { 137 // Figure out the target triple. 138 llvm::Triple TheTriple("unknown-unknown-unknown"); 139 if (TripleName.empty()) { 140 if (Obj) 141 TheTriple.setArch(Triple::ArchType(Obj->getArch())); 142 } else 143 TheTriple.setTriple(Triple::normalize(TripleName)); 144 145 // Get the target specific parser. 146 std::string Error; 147 const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple, 148 Error); 149 if (!TheTarget) { 150 errs() << ToolName << ": " << Error; 151 return 0; 152 } 153 154 // Update the triple name and return the found target. 155 TripleName = TheTriple.getTriple(); 156 return TheTarget; 157 } 158 159 void llvm::StringRefMemoryObject::anchor() { } 160 161 void llvm::DumpBytes(StringRef bytes) { 162 static const char hex_rep[] = "0123456789abcdef"; 163 // FIXME: The real way to do this is to figure out the longest instruction 164 // and align to that size before printing. I'll fix this when I get 165 // around to outputting relocations. 166 // 15 is the longest x86 instruction 167 // 3 is for the hex rep of a byte + a space. 168 // 1 is for the null terminator. 169 enum { OutputSize = (15 * 3) + 1 }; 170 char output[OutputSize]; 171 172 assert(bytes.size() <= 15 173 && "DumpBytes only supports instructions of up to 15 bytes"); 174 memset(output, ' ', sizeof(output)); 175 unsigned index = 0; 176 for (StringRef::iterator i = bytes.begin(), 177 e = bytes.end(); i != e; ++i) { 178 output[index] = hex_rep[(*i & 0xF0) >> 4]; 179 output[index + 1] = hex_rep[*i & 0xF]; 180 index += 3; 181 } 182 183 output[sizeof(output) - 1] = 0; 184 outs() << output; 185 } 186 187 bool llvm::RelocAddressLess(RelocationRef a, RelocationRef b) { 188 uint64_t a_addr, b_addr; 189 if (error(a.getAddress(a_addr))) return false; 190 if (error(b.getAddress(b_addr))) return false; 191 return a_addr < b_addr; 192 } 193 194 static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) { 195 const Target *TheTarget = getTarget(Obj); 196 // getTarget() will have already issued a diagnostic if necessary, so 197 // just bail here if it failed. 198 if (!TheTarget) 199 return; 200 201 // Package up features to be passed to target/subtarget 202 std::string FeaturesStr; 203 if (MAttrs.size()) { 204 SubtargetFeatures Features; 205 for (unsigned i = 0; i != MAttrs.size(); ++i) 206 Features.AddFeature(MAttrs[i]); 207 FeaturesStr = Features.getString(); 208 } 209 210 error_code ec; 211 for (section_iterator i = Obj->begin_sections(), 212 e = Obj->end_sections(); 213 i != e; i.increment(ec)) { 214 if (error(ec)) break; 215 bool text; 216 if (error(i->isText(text))) break; 217 if (!text) continue; 218 219 uint64_t SectionAddr; 220 if (error(i->getAddress(SectionAddr))) break; 221 222 // Make a list of all the symbols in this section. 223 std::vector<std::pair<uint64_t, StringRef> > Symbols; 224 for (symbol_iterator si = Obj->begin_symbols(), 225 se = Obj->end_symbols(); 226 si != se; si.increment(ec)) { 227 bool contains; 228 if (!error(i->containsSymbol(*si, contains)) && contains) { 229 uint64_t Address; 230 if (error(si->getAddress(Address))) break; 231 Address -= SectionAddr; 232 233 StringRef Name; 234 if (error(si->getName(Name))) break; 235 Symbols.push_back(std::make_pair(Address, Name)); 236 } 237 } 238 239 // Sort the symbols by address, just in case they didn't come in that way. 240 array_pod_sort(Symbols.begin(), Symbols.end()); 241 242 // Make a list of all the relocations for this section. 243 std::vector<RelocationRef> Rels; 244 if (InlineRelocs) { 245 for (relocation_iterator ri = i->begin_relocations(), 246 re = i->end_relocations(); 247 ri != re; ri.increment(ec)) { 248 if (error(ec)) break; 249 Rels.push_back(*ri); 250 } 251 } 252 253 // Sort relocations by address. 254 std::sort(Rels.begin(), Rels.end(), RelocAddressLess); 255 256 StringRef SegmentName = ""; 257 if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(Obj)) { 258 DataRefImpl DR = i->getRawDataRefImpl(); 259 if (error(MachO->getSectionFinalSegmentName(DR, SegmentName))) 260 break; 261 } 262 StringRef name; 263 if (error(i->getName(name))) break; 264 outs() << "Disassembly of section "; 265 if (!SegmentName.empty()) 266 outs() << SegmentName << ","; 267 outs() << name << ':'; 268 269 // If the section has no symbols just insert a dummy one and disassemble 270 // the whole section. 271 if (Symbols.empty()) 272 Symbols.push_back(std::make_pair(0, name)); 273 274 // Set up disassembler. 275 OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName)); 276 277 if (!AsmInfo) { 278 errs() << "error: no assembly info for target " << TripleName << "\n"; 279 return; 280 } 281 282 OwningPtr<const MCSubtargetInfo> STI( 283 TheTarget->createMCSubtargetInfo(TripleName, "", FeaturesStr)); 284 285 if (!STI) { 286 errs() << "error: no subtarget info for target " << TripleName << "\n"; 287 return; 288 } 289 290 OwningPtr<const MCDisassembler> DisAsm( 291 TheTarget->createMCDisassembler(*STI)); 292 if (!DisAsm) { 293 errs() << "error: no disassembler for target " << TripleName << "\n"; 294 return; 295 } 296 297 OwningPtr<const MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName)); 298 if (!MRI) { 299 errs() << "error: no register info for target " << TripleName << "\n"; 300 return; 301 } 302 303 OwningPtr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo()); 304 if (!MII) { 305 errs() << "error: no instruction info for target " << TripleName << "\n"; 306 return; 307 } 308 309 int AsmPrinterVariant = AsmInfo->getAssemblerDialect(); 310 OwningPtr<MCInstPrinter> IP(TheTarget->createMCInstPrinter( 311 AsmPrinterVariant, *AsmInfo, *MII, *MRI, *STI)); 312 if (!IP) { 313 errs() << "error: no instruction printer for target " << TripleName 314 << '\n'; 315 return; 316 } 317 318 StringRef Bytes; 319 if (error(i->getContents(Bytes))) break; 320 StringRefMemoryObject memoryObject(Bytes); 321 uint64_t Size; 322 uint64_t Index; 323 uint64_t SectSize; 324 if (error(i->getSize(SectSize))) break; 325 326 std::vector<RelocationRef>::const_iterator rel_cur = Rels.begin(); 327 std::vector<RelocationRef>::const_iterator rel_end = Rels.end(); 328 // Disassemble symbol by symbol. 329 for (unsigned si = 0, se = Symbols.size(); si != se; ++si) { 330 uint64_t Start = Symbols[si].first; 331 uint64_t End; 332 // The end is either the size of the section or the beginning of the next 333 // symbol. 334 if (si == se - 1) 335 End = SectSize; 336 // Make sure this symbol takes up space. 337 else if (Symbols[si + 1].first != Start) 338 End = Symbols[si + 1].first - 1; 339 else 340 // This symbol has the same address as the next symbol. Skip it. 341 continue; 342 343 outs() << '\n' << Symbols[si].second << ":\n"; 344 345 #ifndef NDEBUG 346 raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls(); 347 #else 348 raw_ostream &DebugOut = nulls(); 349 #endif 350 351 for (Index = Start; Index < End; Index += Size) { 352 MCInst Inst; 353 354 if (DisAsm->getInstruction(Inst, Size, memoryObject, Index, 355 DebugOut, nulls())) { 356 outs() << format("%8" PRIx64 ":", SectionAddr + Index); 357 if (!NoShowRawInsn) { 358 outs() << "\t"; 359 DumpBytes(StringRef(Bytes.data() + Index, Size)); 360 } 361 IP->printInst(&Inst, outs(), ""); 362 outs() << "\n"; 363 } else { 364 errs() << ToolName << ": warning: invalid instruction encoding\n"; 365 if (Size == 0) 366 Size = 1; // skip illegible bytes 367 } 368 369 // Print relocation for instruction. 370 while (rel_cur != rel_end) { 371 bool hidden = false; 372 uint64_t addr; 373 SmallString<16> name; 374 SmallString<32> val; 375 376 // If this relocation is hidden, skip it. 377 if (error(rel_cur->getHidden(hidden))) goto skip_print_rel; 378 if (hidden) goto skip_print_rel; 379 380 if (error(rel_cur->getAddress(addr))) goto skip_print_rel; 381 // Stop when rel_cur's address is past the current instruction. 382 if (addr >= Index + Size) break; 383 if (error(rel_cur->getTypeName(name))) goto skip_print_rel; 384 if (error(rel_cur->getValueString(val))) goto skip_print_rel; 385 386 outs() << format("\t\t\t%8" PRIx64 ": ", SectionAddr + addr) << name 387 << "\t" << val << "\n"; 388 389 skip_print_rel: 390 ++rel_cur; 391 } 392 } 393 } 394 } 395 } 396 397 static void PrintRelocations(const ObjectFile *o) { 398 error_code ec; 399 for (section_iterator si = o->begin_sections(), se = o->end_sections(); 400 si != se; si.increment(ec)){ 401 if (error(ec)) return; 402 if (si->begin_relocations() == si->end_relocations()) 403 continue; 404 StringRef secname; 405 if (error(si->getName(secname))) continue; 406 outs() << "RELOCATION RECORDS FOR [" << secname << "]:\n"; 407 for (relocation_iterator ri = si->begin_relocations(), 408 re = si->end_relocations(); 409 ri != re; ri.increment(ec)) { 410 if (error(ec)) return; 411 412 bool hidden; 413 uint64_t address; 414 SmallString<32> relocname; 415 SmallString<32> valuestr; 416 if (error(ri->getHidden(hidden))) continue; 417 if (hidden) continue; 418 if (error(ri->getTypeName(relocname))) continue; 419 if (error(ri->getAddress(address))) continue; 420 if (error(ri->getValueString(valuestr))) continue; 421 outs() << address << " " << relocname << " " << valuestr << "\n"; 422 } 423 outs() << "\n"; 424 } 425 } 426 427 static void PrintSectionHeaders(const ObjectFile *o) { 428 outs() << "Sections:\n" 429 "Idx Name Size Address Type\n"; 430 error_code ec; 431 unsigned i = 0; 432 for (section_iterator si = o->begin_sections(), se = o->end_sections(); 433 si != se; si.increment(ec)) { 434 if (error(ec)) return; 435 StringRef Name; 436 if (error(si->getName(Name))) return; 437 uint64_t Address; 438 if (error(si->getAddress(Address))) return; 439 uint64_t Size; 440 if (error(si->getSize(Size))) return; 441 bool Text, Data, BSS; 442 if (error(si->isText(Text))) return; 443 if (error(si->isData(Data))) return; 444 if (error(si->isBSS(BSS))) return; 445 std::string Type = (std::string(Text ? "TEXT " : "") + 446 (Data ? "DATA " : "") + (BSS ? "BSS" : "")); 447 outs() << format("%3d %-13s %08" PRIx64 " %016" PRIx64 " %s\n", 448 i, Name.str().c_str(), Size, Address, Type.c_str()); 449 ++i; 450 } 451 } 452 453 static void PrintSectionContents(const ObjectFile *o) { 454 error_code ec; 455 for (section_iterator si = o->begin_sections(), 456 se = o->end_sections(); 457 si != se; si.increment(ec)) { 458 if (error(ec)) return; 459 StringRef Name; 460 StringRef Contents; 461 uint64_t BaseAddr; 462 if (error(si->getName(Name))) continue; 463 if (error(si->getContents(Contents))) continue; 464 if (error(si->getAddress(BaseAddr))) continue; 465 466 outs() << "Contents of section " << Name << ":\n"; 467 468 // Dump out the content as hex and printable ascii characters. 469 for (std::size_t addr = 0, end = Contents.size(); addr < end; addr += 16) { 470 outs() << format(" %04" PRIx64 " ", BaseAddr + addr); 471 // Dump line of hex. 472 for (std::size_t i = 0; i < 16; ++i) { 473 if (i != 0 && i % 4 == 0) 474 outs() << ' '; 475 if (addr + i < end) 476 outs() << hexdigit((Contents[addr + i] >> 4) & 0xF, true) 477 << hexdigit(Contents[addr + i] & 0xF, true); 478 else 479 outs() << " "; 480 } 481 // Print ascii. 482 outs() << " "; 483 for (std::size_t i = 0; i < 16 && addr + i < end; ++i) { 484 if (std::isprint(static_cast<unsigned char>(Contents[addr + i]) & 0xFF)) 485 outs() << Contents[addr + i]; 486 else 487 outs() << "."; 488 } 489 outs() << "\n"; 490 } 491 } 492 } 493 494 static void PrintCOFFSymbolTable(const COFFObjectFile *coff) { 495 const coff_file_header *header; 496 if (error(coff->getHeader(header))) return; 497 int aux_count = 0; 498 const coff_symbol *symbol = 0; 499 for (int i = 0, e = header->NumberOfSymbols; i != e; ++i) { 500 if (aux_count--) { 501 // Figure out which type of aux this is. 502 if (symbol->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC 503 && symbol->Value == 0) { // Section definition. 504 const coff_aux_section_definition *asd; 505 if (error(coff->getAuxSymbol<coff_aux_section_definition>(i, asd))) 506 return; 507 outs() << "AUX " 508 << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x " 509 , unsigned(asd->Length) 510 , unsigned(asd->NumberOfRelocations) 511 , unsigned(asd->NumberOfLinenumbers) 512 , unsigned(asd->CheckSum)) 513 << format("assoc %d comdat %d\n" 514 , unsigned(asd->Number) 515 , unsigned(asd->Selection)); 516 } else 517 outs() << "AUX Unknown\n"; 518 } else { 519 StringRef name; 520 if (error(coff->getSymbol(i, symbol))) return; 521 if (error(coff->getSymbolName(symbol, name))) return; 522 outs() << "[" << format("%2d", i) << "]" 523 << "(sec " << format("%2d", int(symbol->SectionNumber)) << ")" 524 << "(fl 0x00)" // Flag bits, which COFF doesn't have. 525 << "(ty " << format("%3x", unsigned(symbol->Type)) << ")" 526 << "(scl " << format("%3x", unsigned(symbol->StorageClass)) << ") " 527 << "(nx " << unsigned(symbol->NumberOfAuxSymbols) << ") " 528 << "0x" << format("%08x", unsigned(symbol->Value)) << " " 529 << name << "\n"; 530 aux_count = symbol->NumberOfAuxSymbols; 531 } 532 } 533 } 534 535 static void PrintSymbolTable(const ObjectFile *o) { 536 outs() << "SYMBOL TABLE:\n"; 537 538 if (const COFFObjectFile *coff = dyn_cast<const COFFObjectFile>(o)) 539 PrintCOFFSymbolTable(coff); 540 else { 541 error_code ec; 542 for (symbol_iterator si = o->begin_symbols(), 543 se = o->end_symbols(); si != se; si.increment(ec)) { 544 if (error(ec)) return; 545 StringRef Name; 546 uint64_t Address; 547 SymbolRef::Type Type; 548 uint64_t Size; 549 uint32_t Flags; 550 section_iterator Section = o->end_sections(); 551 if (error(si->getName(Name))) continue; 552 if (error(si->getAddress(Address))) continue; 553 if (error(si->getFlags(Flags))) continue; 554 if (error(si->getType(Type))) continue; 555 if (error(si->getSize(Size))) continue; 556 if (error(si->getSection(Section))) continue; 557 558 bool Global = Flags & SymbolRef::SF_Global; 559 bool Weak = Flags & SymbolRef::SF_Weak; 560 bool Absolute = Flags & SymbolRef::SF_Absolute; 561 562 if (Address == UnknownAddressOrSize) 563 Address = 0; 564 if (Size == UnknownAddressOrSize) 565 Size = 0; 566 char GlobLoc = ' '; 567 if (Type != SymbolRef::ST_Unknown) 568 GlobLoc = Global ? 'g' : 'l'; 569 char Debug = (Type == SymbolRef::ST_Debug || Type == SymbolRef::ST_File) 570 ? 'd' : ' '; 571 char FileFunc = ' '; 572 if (Type == SymbolRef::ST_File) 573 FileFunc = 'f'; 574 else if (Type == SymbolRef::ST_Function) 575 FileFunc = 'F'; 576 577 const char *Fmt = o->getBytesInAddress() > 4 ? "%016" PRIx64 : 578 "%08" PRIx64; 579 580 outs() << format(Fmt, Address) << " " 581 << GlobLoc // Local -> 'l', Global -> 'g', Neither -> ' ' 582 << (Weak ? 'w' : ' ') // Weak? 583 << ' ' // Constructor. Not supported yet. 584 << ' ' // Warning. Not supported yet. 585 << ' ' // Indirect reference to another symbol. 586 << Debug // Debugging (d) or dynamic (D) symbol. 587 << FileFunc // Name of function (F), file (f) or object (O). 588 << ' '; 589 if (Absolute) 590 outs() << "*ABS*"; 591 else if (Section == o->end_sections()) 592 outs() << "*UND*"; 593 else { 594 if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(o)) { 595 StringRef SegmentName; 596 DataRefImpl DR = Section->getRawDataRefImpl(); 597 if (error(MachO->getSectionFinalSegmentName(DR, SegmentName))) 598 SegmentName = ""; 599 outs() << SegmentName << ","; 600 } 601 StringRef SectionName; 602 if (error(Section->getName(SectionName))) 603 SectionName = ""; 604 outs() << SectionName; 605 } 606 outs() << '\t' 607 << format("%08" PRIx64 " ", Size) 608 << Name 609 << '\n'; 610 } 611 } 612 } 613 614 static void PrintUnwindInfo(const ObjectFile *o) { 615 outs() << "Unwind info:\n\n"; 616 617 if (const COFFObjectFile *coff = dyn_cast<COFFObjectFile>(o)) { 618 printCOFFUnwindInfo(coff); 619 } else { 620 // TODO: Extract DWARF dump tool to objdump. 621 errs() << "This operation is only currently supported " 622 "for COFF object files.\n"; 623 return; 624 } 625 } 626 627 static void DumpObject(const ObjectFile *o) { 628 outs() << '\n'; 629 outs() << o->getFileName() 630 << ":\tfile format " << o->getFileFormatName() << "\n\n"; 631 632 if (Disassemble) 633 DisassembleObject(o, Relocations); 634 if (Relocations && !Disassemble) 635 PrintRelocations(o); 636 if (SectionHeaders) 637 PrintSectionHeaders(o); 638 if (SectionContents) 639 PrintSectionContents(o); 640 if (SymbolTable) 641 PrintSymbolTable(o); 642 if (UnwindInfo) 643 PrintUnwindInfo(o); 644 if (PrivateHeaders && o->isELF()) 645 printELFFileHeader(o); 646 } 647 648 /// @brief Dump each object file in \a a; 649 static void DumpArchive(const Archive *a) { 650 for (Archive::child_iterator i = a->begin_children(), 651 e = a->end_children(); i != e; ++i) { 652 OwningPtr<Binary> child; 653 if (error_code ec = i->getAsBinary(child)) { 654 // Ignore non-object files. 655 if (ec != object_error::invalid_file_type) 656 errs() << ToolName << ": '" << a->getFileName() << "': " << ec.message() 657 << ".\n"; 658 continue; 659 } 660 if (ObjectFile *o = dyn_cast<ObjectFile>(child.get())) 661 DumpObject(o); 662 else 663 errs() << ToolName << ": '" << a->getFileName() << "': " 664 << "Unrecognized file type.\n"; 665 } 666 } 667 668 /// @brief Open file and figure out how to dump it. 669 static void DumpInput(StringRef file) { 670 // If file isn't stdin, check that it exists. 671 if (file != "-" && !sys::fs::exists(file)) { 672 errs() << ToolName << ": '" << file << "': " << "No such file\n"; 673 return; 674 } 675 676 if (MachOOpt && Disassemble) { 677 DisassembleInputMachO(file); 678 return; 679 } 680 681 // Attempt to open the binary. 682 OwningPtr<Binary> binary; 683 if (error_code ec = createBinary(file, binary)) { 684 errs() << ToolName << ": '" << file << "': " << ec.message() << ".\n"; 685 return; 686 } 687 688 if (Archive *a = dyn_cast<Archive>(binary.get())) 689 DumpArchive(a); 690 else if (ObjectFile *o = dyn_cast<ObjectFile>(binary.get())) 691 DumpObject(o); 692 else 693 errs() << ToolName << ": '" << file << "': " << "Unrecognized file type.\n"; 694 } 695 696 int main(int argc, char **argv) { 697 // Print a stack trace if we signal out. 698 sys::PrintStackTraceOnErrorSignal(); 699 PrettyStackTraceProgram X(argc, argv); 700 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 701 702 // Initialize targets and assembly printers/parsers. 703 llvm::InitializeAllTargetInfos(); 704 llvm::InitializeAllTargetMCs(); 705 llvm::InitializeAllAsmParsers(); 706 llvm::InitializeAllDisassemblers(); 707 708 // Register the target printer for --version. 709 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion); 710 711 cl::ParseCommandLineOptions(argc, argv, "llvm object file dumper\n"); 712 TripleName = Triple::normalize(TripleName); 713 714 ToolName = argv[0]; 715 716 // Defaults to a.out if no filenames specified. 717 if (InputFilenames.size() == 0) 718 InputFilenames.push_back("a.out"); 719 720 if (!Disassemble 721 && !Relocations 722 && !SectionHeaders 723 && !SectionContents 724 && !SymbolTable 725 && !UnwindInfo 726 && !PrivateHeaders) { 727 cl::PrintHelpMessage(); 728 return 2; 729 } 730 731 std::for_each(InputFilenames.begin(), InputFilenames.end(), 732 DumpInput); 733 734 return 0; 735 } 736