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/MCContext.h" 27 #include "llvm/MC/MCDisassembler.h" 28 #include "llvm/MC/MCInst.h" 29 #include "llvm/MC/MCInstPrinter.h" 30 #include "llvm/MC/MCInstrInfo.h" 31 #include "llvm/MC/MCObjectFileInfo.h" 32 #include "llvm/MC/MCObjectSymbolizer.h" 33 #include "llvm/MC/MCRegisterInfo.h" 34 #include "llvm/MC/MCSubtargetInfo.h" 35 #include "llvm/MC/MCRelocationInfo.h" 36 #include "llvm/Object/Archive.h" 37 #include "llvm/Object/COFF.h" 38 #include "llvm/Object/MachO.h" 39 #include "llvm/Object/ObjectFile.h" 40 #include "llvm/Support/Casting.h" 41 #include "llvm/Support/CommandLine.h" 42 #include "llvm/Support/Debug.h" 43 #include "llvm/Support/FileSystem.h" 44 #include "llvm/Support/Format.h" 45 #include "llvm/Support/GraphWriter.h" 46 #include "llvm/Support/Host.h" 47 #include "llvm/Support/ManagedStatic.h" 48 #include "llvm/Support/MemoryBuffer.h" 49 #include "llvm/Support/MemoryObject.h" 50 #include "llvm/Support/PrettyStackTrace.h" 51 #include "llvm/Support/Signals.h" 52 #include "llvm/Support/SourceMgr.h" 53 #include "llvm/Support/TargetRegistry.h" 54 #include "llvm/Support/TargetSelect.h" 55 #include "llvm/Support/raw_ostream.h" 56 #include "llvm/Support/system_error.h" 57 #include <algorithm> 58 #include <cctype> 59 #include <cstring> 60 using namespace llvm; 61 using namespace object; 62 63 static cl::list<std::string> 64 InputFilenames(cl::Positional, cl::desc("<input object files>"),cl::ZeroOrMore); 65 66 static cl::opt<bool> 67 Disassemble("disassemble", 68 cl::desc("Display assembler mnemonics for the machine instructions")); 69 static cl::alias 70 Disassembled("d", cl::desc("Alias for --disassemble"), 71 cl::aliasopt(Disassemble)); 72 73 static cl::opt<bool> 74 Relocations("r", cl::desc("Display the relocation entries in the file")); 75 76 static cl::opt<bool> 77 SectionContents("s", cl::desc("Display the content of each section")); 78 79 static cl::opt<bool> 80 SymbolTable("t", cl::desc("Display the symbol table")); 81 82 static cl::opt<bool> 83 MachOOpt("macho", cl::desc("Use MachO specific object file parser")); 84 static cl::alias 85 MachOm("m", cl::desc("Alias for --macho"), cl::aliasopt(MachOOpt)); 86 87 cl::opt<std::string> 88 llvm::TripleName("triple", cl::desc("Target triple to disassemble for, " 89 "see -version for available targets")); 90 91 cl::opt<std::string> 92 llvm::ArchName("arch", cl::desc("Target arch to disassemble for, " 93 "see -version for available targets")); 94 95 static cl::opt<bool> 96 SectionHeaders("section-headers", cl::desc("Display summaries of the headers " 97 "for each section.")); 98 static cl::alias 99 SectionHeadersShort("headers", cl::desc("Alias for --section-headers"), 100 cl::aliasopt(SectionHeaders)); 101 static cl::alias 102 SectionHeadersShorter("h", cl::desc("Alias for --section-headers"), 103 cl::aliasopt(SectionHeaders)); 104 105 static cl::list<std::string> 106 MAttrs("mattr", 107 cl::CommaSeparated, 108 cl::desc("Target specific attributes"), 109 cl::value_desc("a1,+a2,-a3,...")); 110 111 static cl::opt<bool> 112 NoShowRawInsn("no-show-raw-insn", cl::desc("When disassembling instructions, " 113 "do not print the instruction bytes.")); 114 115 static cl::opt<bool> 116 UnwindInfo("unwind-info", cl::desc("Display unwind information")); 117 118 static cl::alias 119 UnwindInfoShort("u", cl::desc("Alias for --unwind-info"), 120 cl::aliasopt(UnwindInfo)); 121 122 static cl::opt<bool> 123 PrivateHeaders("private-headers", 124 cl::desc("Display format specific file headers")); 125 126 static cl::alias 127 PrivateHeadersShort("p", cl::desc("Alias for --private-headers"), 128 cl::aliasopt(PrivateHeaders)); 129 130 static cl::opt<bool> 131 Symbolize("symbolize", cl::desc("When disassembling instructions, " 132 "try to symbolize operands.")); 133 134 static StringRef ToolName; 135 136 bool llvm::error(error_code ec) { 137 if (!ec) return false; 138 139 outs() << ToolName << ": error reading file: " << ec.message() << ".\n"; 140 outs().flush(); 141 return true; 142 } 143 144 static const Target *getTarget(const ObjectFile *Obj = NULL) { 145 // Figure out the target triple. 146 llvm::Triple TheTriple("unknown-unknown-unknown"); 147 if (TripleName.empty()) { 148 if (Obj) { 149 TheTriple.setArch(Triple::ArchType(Obj->getArch())); 150 // TheTriple defaults to ELF, and COFF doesn't have an environment: 151 // the best we can do here is indicate that it is mach-o. 152 if (Obj->isMachO()) 153 TheTriple.setEnvironment(Triple::MachO); 154 } 155 } else 156 TheTriple.setTriple(Triple::normalize(TripleName)); 157 158 // Get the target specific parser. 159 std::string Error; 160 const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple, 161 Error); 162 if (!TheTarget) { 163 errs() << ToolName << ": " << Error; 164 return 0; 165 } 166 167 // Update the triple name and return the found target. 168 TripleName = TheTriple.getTriple(); 169 return TheTarget; 170 } 171 172 void llvm::StringRefMemoryObject::anchor() { } 173 174 void llvm::DumpBytes(StringRef bytes) { 175 static const char hex_rep[] = "0123456789abcdef"; 176 // FIXME: The real way to do this is to figure out the longest instruction 177 // and align to that size before printing. I'll fix this when I get 178 // around to outputting relocations. 179 // 15 is the longest x86 instruction 180 // 3 is for the hex rep of a byte + a space. 181 // 1 is for the null terminator. 182 enum { OutputSize = (15 * 3) + 1 }; 183 char output[OutputSize]; 184 185 assert(bytes.size() <= 15 186 && "DumpBytes only supports instructions of up to 15 bytes"); 187 memset(output, ' ', sizeof(output)); 188 unsigned index = 0; 189 for (StringRef::iterator i = bytes.begin(), 190 e = bytes.end(); i != e; ++i) { 191 output[index] = hex_rep[(*i & 0xF0) >> 4]; 192 output[index + 1] = hex_rep[*i & 0xF]; 193 index += 3; 194 } 195 196 output[sizeof(output) - 1] = 0; 197 outs() << output; 198 } 199 200 bool llvm::RelocAddressLess(RelocationRef a, RelocationRef b) { 201 uint64_t a_addr, b_addr; 202 if (error(a.getOffset(a_addr))) return false; 203 if (error(b.getOffset(b_addr))) return false; 204 return a_addr < b_addr; 205 } 206 207 static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) { 208 const Target *TheTarget = getTarget(Obj); 209 // getTarget() will have already issued a diagnostic if necessary, so 210 // just bail here if it failed. 211 if (!TheTarget) 212 return; 213 214 // Package up features to be passed to target/subtarget 215 std::string FeaturesStr; 216 if (MAttrs.size()) { 217 SubtargetFeatures Features; 218 for (unsigned i = 0; i != MAttrs.size(); ++i) 219 Features.AddFeature(MAttrs[i]); 220 FeaturesStr = Features.getString(); 221 } 222 223 OwningPtr<const MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName)); 224 if (!MRI) { 225 errs() << "error: no register info for target " << TripleName << "\n"; 226 return; 227 } 228 229 // Set up disassembler. 230 OwningPtr<const MCAsmInfo> AsmInfo( 231 TheTarget->createMCAsmInfo(*MRI, TripleName)); 232 if (!AsmInfo) { 233 errs() << "error: no assembly info for target " << TripleName << "\n"; 234 return; 235 } 236 237 OwningPtr<const MCSubtargetInfo> STI( 238 TheTarget->createMCSubtargetInfo(TripleName, "", FeaturesStr)); 239 if (!STI) { 240 errs() << "error: no subtarget info for target " << TripleName << "\n"; 241 return; 242 } 243 244 OwningPtr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo()); 245 if (!MII) { 246 errs() << "error: no instruction info for target " << TripleName << "\n"; 247 return; 248 } 249 250 OwningPtr<MCDisassembler> DisAsm(TheTarget->createMCDisassembler(*STI)); 251 if (!DisAsm) { 252 errs() << "error: no disassembler for target " << TripleName << "\n"; 253 return; 254 } 255 256 OwningPtr<const MCObjectFileInfo> MOFI; 257 OwningPtr<MCContext> Ctx; 258 259 if (Symbolize) { 260 MOFI.reset(new MCObjectFileInfo); 261 Ctx.reset(new MCContext(*AsmInfo.get(), *MRI.get(), MOFI.get())); 262 OwningPtr<MCRelocationInfo> RelInfo( 263 TheTarget->createMCRelocationInfo(TripleName, *Ctx.get())); 264 if (RelInfo) { 265 OwningPtr<MCSymbolizer> Symzer( 266 MCObjectSymbolizer::createObjectSymbolizer(*Ctx.get(), RelInfo, Obj)); 267 if (Symzer) 268 DisAsm->setSymbolizer(Symzer); 269 } 270 } 271 272 int AsmPrinterVariant = AsmInfo->getAssemblerDialect(); 273 OwningPtr<MCInstPrinter> IP(TheTarget->createMCInstPrinter( 274 AsmPrinterVariant, *AsmInfo, *MII, *MRI, *STI)); 275 if (!IP) { 276 errs() << "error: no instruction printer for target " << TripleName 277 << '\n'; 278 return; 279 } 280 281 error_code ec; 282 for (section_iterator i = Obj->begin_sections(), 283 e = Obj->end_sections(); 284 i != e; i.increment(ec)) { 285 if (error(ec)) break; 286 bool text; 287 if (error(i->isText(text))) break; 288 if (!text) continue; 289 290 uint64_t SectionAddr; 291 if (error(i->getAddress(SectionAddr))) break; 292 293 // Make a list of all the symbols in this section. 294 std::vector<std::pair<uint64_t, StringRef> > Symbols; 295 for (symbol_iterator si = Obj->begin_symbols(), 296 se = Obj->end_symbols(); 297 si != se; si.increment(ec)) { 298 bool contains; 299 if (!error(i->containsSymbol(*si, contains)) && contains) { 300 uint64_t Address; 301 if (error(si->getAddress(Address))) break; 302 if (Address == UnknownAddressOrSize) continue; 303 Address -= SectionAddr; 304 305 StringRef Name; 306 if (error(si->getName(Name))) break; 307 Symbols.push_back(std::make_pair(Address, Name)); 308 } 309 } 310 311 // Sort the symbols by address, just in case they didn't come in that way. 312 array_pod_sort(Symbols.begin(), Symbols.end()); 313 314 // Make a list of all the relocations for this section. 315 std::vector<RelocationRef> Rels; 316 if (InlineRelocs) { 317 for (relocation_iterator ri = i->begin_relocations(), 318 re = i->end_relocations(); 319 ri != re; ri.increment(ec)) { 320 if (error(ec)) break; 321 Rels.push_back(*ri); 322 } 323 } 324 325 // Sort relocations by address. 326 std::sort(Rels.begin(), Rels.end(), RelocAddressLess); 327 328 StringRef SegmentName = ""; 329 if (const MachOObjectFile *MachO = 330 dyn_cast<const MachOObjectFile>(Obj)) { 331 DataRefImpl DR = i->getRawDataRefImpl(); 332 SegmentName = MachO->getSectionFinalSegmentName(DR); 333 } 334 StringRef name; 335 if (error(i->getName(name))) break; 336 outs() << "Disassembly of section "; 337 if (!SegmentName.empty()) 338 outs() << SegmentName << ","; 339 outs() << name << ':'; 340 341 // If the section has no symbols just insert a dummy one and disassemble 342 // the whole section. 343 if (Symbols.empty()) 344 Symbols.push_back(std::make_pair(0, name)); 345 346 347 SmallString<40> Comments; 348 raw_svector_ostream CommentStream(Comments); 349 350 StringRef Bytes; 351 if (error(i->getContents(Bytes))) break; 352 StringRefMemoryObject memoryObject(Bytes, SectionAddr); 353 uint64_t Size; 354 uint64_t Index; 355 uint64_t SectSize; 356 if (error(i->getSize(SectSize))) break; 357 358 std::vector<RelocationRef>::const_iterator rel_cur = Rels.begin(); 359 std::vector<RelocationRef>::const_iterator rel_end = Rels.end(); 360 // Disassemble symbol by symbol. 361 for (unsigned si = 0, se = Symbols.size(); si != se; ++si) { 362 uint64_t Start = Symbols[si].first; 363 uint64_t End; 364 // The end is either the size of the section or the beginning of the next 365 // symbol. 366 if (si == se - 1) 367 End = SectSize; 368 // Make sure this symbol takes up space. 369 else if (Symbols[si + 1].first != Start) 370 End = Symbols[si + 1].first - 1; 371 else 372 // This symbol has the same address as the next symbol. Skip it. 373 continue; 374 375 outs() << '\n' << Symbols[si].second << ":\n"; 376 377 #ifndef NDEBUG 378 raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls(); 379 #else 380 raw_ostream &DebugOut = nulls(); 381 #endif 382 383 for (Index = Start; Index < End; Index += Size) { 384 MCInst Inst; 385 386 if (DisAsm->getInstruction(Inst, Size, memoryObject, 387 SectionAddr + Index, 388 DebugOut, CommentStream)) { 389 outs() << format("%8" PRIx64 ":", SectionAddr + Index); 390 if (!NoShowRawInsn) { 391 outs() << "\t"; 392 DumpBytes(StringRef(Bytes.data() + Index, Size)); 393 } 394 IP->printInst(&Inst, outs(), ""); 395 outs() << CommentStream.str(); 396 Comments.clear(); 397 outs() << "\n"; 398 } else { 399 errs() << ToolName << ": warning: invalid instruction encoding\n"; 400 if (Size == 0) 401 Size = 1; // skip illegible bytes 402 } 403 404 // Print relocation for instruction. 405 while (rel_cur != rel_end) { 406 bool hidden = false; 407 uint64_t addr; 408 SmallString<16> name; 409 SmallString<32> val; 410 411 // If this relocation is hidden, skip it. 412 if (error(rel_cur->getHidden(hidden))) goto skip_print_rel; 413 if (hidden) goto skip_print_rel; 414 415 if (error(rel_cur->getOffset(addr))) goto skip_print_rel; 416 // Stop when rel_cur's address is past the current instruction. 417 if (addr >= Index + Size) break; 418 if (error(rel_cur->getTypeName(name))) goto skip_print_rel; 419 if (error(rel_cur->getValueString(val))) goto skip_print_rel; 420 421 outs() << format("\t\t\t%8" PRIx64 ": ", SectionAddr + addr) << name 422 << "\t" << val << "\n"; 423 424 skip_print_rel: 425 ++rel_cur; 426 } 427 } 428 } 429 } 430 } 431 432 static void PrintRelocations(const ObjectFile *o) { 433 error_code ec; 434 for (section_iterator si = o->begin_sections(), se = o->end_sections(); 435 si != se; si.increment(ec)){ 436 if (error(ec)) return; 437 if (si->begin_relocations() == si->end_relocations()) 438 continue; 439 StringRef secname; 440 if (error(si->getName(secname))) continue; 441 outs() << "RELOCATION RECORDS FOR [" << secname << "]:\n"; 442 for (relocation_iterator ri = si->begin_relocations(), 443 re = si->end_relocations(); 444 ri != re; ri.increment(ec)) { 445 if (error(ec)) return; 446 447 bool hidden; 448 uint64_t address; 449 SmallString<32> relocname; 450 SmallString<32> valuestr; 451 if (error(ri->getHidden(hidden))) continue; 452 if (hidden) continue; 453 if (error(ri->getTypeName(relocname))) continue; 454 if (error(ri->getOffset(address))) continue; 455 if (error(ri->getValueString(valuestr))) continue; 456 outs() << address << " " << relocname << " " << valuestr << "\n"; 457 } 458 outs() << "\n"; 459 } 460 } 461 462 static void PrintSectionHeaders(const ObjectFile *o) { 463 outs() << "Sections:\n" 464 "Idx Name Size Address Type\n"; 465 error_code ec; 466 unsigned i = 0; 467 for (section_iterator si = o->begin_sections(), se = o->end_sections(); 468 si != se; si.increment(ec)) { 469 if (error(ec)) return; 470 StringRef Name; 471 if (error(si->getName(Name))) return; 472 uint64_t Address; 473 if (error(si->getAddress(Address))) return; 474 uint64_t Size; 475 if (error(si->getSize(Size))) return; 476 bool Text, Data, BSS; 477 if (error(si->isText(Text))) return; 478 if (error(si->isData(Data))) return; 479 if (error(si->isBSS(BSS))) return; 480 std::string Type = (std::string(Text ? "TEXT " : "") + 481 (Data ? "DATA " : "") + (BSS ? "BSS" : "")); 482 outs() << format("%3d %-13s %08" PRIx64 " %016" PRIx64 " %s\n", 483 i, Name.str().c_str(), Size, Address, Type.c_str()); 484 ++i; 485 } 486 } 487 488 static void PrintSectionContents(const ObjectFile *o) { 489 error_code ec; 490 for (section_iterator si = o->begin_sections(), 491 se = o->end_sections(); 492 si != se; si.increment(ec)) { 493 if (error(ec)) return; 494 StringRef Name; 495 StringRef Contents; 496 uint64_t BaseAddr; 497 bool BSS; 498 if (error(si->getName(Name))) continue; 499 if (error(si->getContents(Contents))) continue; 500 if (error(si->getAddress(BaseAddr))) continue; 501 if (error(si->isBSS(BSS))) continue; 502 503 outs() << "Contents of section " << Name << ":\n"; 504 if (BSS) { 505 outs() << format("<skipping contents of bss section at [%04" PRIx64 506 ", %04" PRIx64 ")>\n", BaseAddr, 507 BaseAddr + Contents.size()); 508 continue; 509 } 510 511 // Dump out the content as hex and printable ascii characters. 512 for (std::size_t addr = 0, end = Contents.size(); addr < end; addr += 16) { 513 outs() << format(" %04" PRIx64 " ", BaseAddr + addr); 514 // Dump line of hex. 515 for (std::size_t i = 0; i < 16; ++i) { 516 if (i != 0 && i % 4 == 0) 517 outs() << ' '; 518 if (addr + i < end) 519 outs() << hexdigit((Contents[addr + i] >> 4) & 0xF, true) 520 << hexdigit(Contents[addr + i] & 0xF, true); 521 else 522 outs() << " "; 523 } 524 // Print ascii. 525 outs() << " "; 526 for (std::size_t i = 0; i < 16 && addr + i < end; ++i) { 527 if (std::isprint(static_cast<unsigned char>(Contents[addr + i]) & 0xFF)) 528 outs() << Contents[addr + i]; 529 else 530 outs() << "."; 531 } 532 outs() << "\n"; 533 } 534 } 535 } 536 537 static void PrintCOFFSymbolTable(const COFFObjectFile *coff) { 538 const coff_file_header *header; 539 if (error(coff->getHeader(header))) return; 540 int aux_count = 0; 541 const coff_symbol *symbol = 0; 542 for (int i = 0, e = header->NumberOfSymbols; i != e; ++i) { 543 if (aux_count--) { 544 // Figure out which type of aux this is. 545 if (symbol->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC 546 && symbol->Value == 0) { // Section definition. 547 const coff_aux_section_definition *asd; 548 if (error(coff->getAuxSymbol<coff_aux_section_definition>(i, asd))) 549 return; 550 outs() << "AUX " 551 << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x " 552 , unsigned(asd->Length) 553 , unsigned(asd->NumberOfRelocations) 554 , unsigned(asd->NumberOfLinenumbers) 555 , unsigned(asd->CheckSum)) 556 << format("assoc %d comdat %d\n" 557 , unsigned(asd->Number) 558 , unsigned(asd->Selection)); 559 } else 560 outs() << "AUX Unknown\n"; 561 } else { 562 StringRef name; 563 if (error(coff->getSymbol(i, symbol))) return; 564 if (error(coff->getSymbolName(symbol, name))) return; 565 outs() << "[" << format("%2d", i) << "]" 566 << "(sec " << format("%2d", int(symbol->SectionNumber)) << ")" 567 << "(fl 0x00)" // Flag bits, which COFF doesn't have. 568 << "(ty " << format("%3x", unsigned(symbol->Type)) << ")" 569 << "(scl " << format("%3x", unsigned(symbol->StorageClass)) << ") " 570 << "(nx " << unsigned(symbol->NumberOfAuxSymbols) << ") " 571 << "0x" << format("%08x", unsigned(symbol->Value)) << " " 572 << name << "\n"; 573 aux_count = symbol->NumberOfAuxSymbols; 574 } 575 } 576 } 577 578 static void PrintSymbolTable(const ObjectFile *o) { 579 outs() << "SYMBOL TABLE:\n"; 580 581 if (const COFFObjectFile *coff = dyn_cast<const COFFObjectFile>(o)) 582 PrintCOFFSymbolTable(coff); 583 else { 584 error_code ec; 585 for (symbol_iterator si = o->begin_symbols(), 586 se = o->end_symbols(); si != se; si.increment(ec)) { 587 if (error(ec)) return; 588 StringRef Name; 589 uint64_t Address; 590 SymbolRef::Type Type; 591 uint64_t Size; 592 uint32_t Flags; 593 section_iterator Section = o->end_sections(); 594 if (error(si->getName(Name))) continue; 595 if (error(si->getAddress(Address))) continue; 596 if (error(si->getFlags(Flags))) continue; 597 if (error(si->getType(Type))) continue; 598 if (error(si->getSize(Size))) continue; 599 if (error(si->getSection(Section))) continue; 600 601 bool Global = Flags & SymbolRef::SF_Global; 602 bool Weak = Flags & SymbolRef::SF_Weak; 603 bool Absolute = Flags & SymbolRef::SF_Absolute; 604 605 if (Address == UnknownAddressOrSize) 606 Address = 0; 607 if (Size == UnknownAddressOrSize) 608 Size = 0; 609 char GlobLoc = ' '; 610 if (Type != SymbolRef::ST_Unknown) 611 GlobLoc = Global ? 'g' : 'l'; 612 char Debug = (Type == SymbolRef::ST_Debug || Type == SymbolRef::ST_File) 613 ? 'd' : ' '; 614 char FileFunc = ' '; 615 if (Type == SymbolRef::ST_File) 616 FileFunc = 'f'; 617 else if (Type == SymbolRef::ST_Function) 618 FileFunc = 'F'; 619 620 const char *Fmt = o->getBytesInAddress() > 4 ? "%016" PRIx64 : 621 "%08" PRIx64; 622 623 outs() << format(Fmt, Address) << " " 624 << GlobLoc // Local -> 'l', Global -> 'g', Neither -> ' ' 625 << (Weak ? 'w' : ' ') // Weak? 626 << ' ' // Constructor. Not supported yet. 627 << ' ' // Warning. Not supported yet. 628 << ' ' // Indirect reference to another symbol. 629 << Debug // Debugging (d) or dynamic (D) symbol. 630 << FileFunc // Name of function (F), file (f) or object (O). 631 << ' '; 632 if (Absolute) 633 outs() << "*ABS*"; 634 else if (Section == o->end_sections()) 635 outs() << "*UND*"; 636 else { 637 if (const MachOObjectFile *MachO = 638 dyn_cast<const MachOObjectFile>(o)) { 639 DataRefImpl DR = Section->getRawDataRefImpl(); 640 StringRef SegmentName = MachO->getSectionFinalSegmentName(DR); 641 outs() << SegmentName << ","; 642 } 643 StringRef SectionName; 644 if (error(Section->getName(SectionName))) 645 SectionName = ""; 646 outs() << SectionName; 647 } 648 outs() << '\t' 649 << format("%08" PRIx64 " ", Size) 650 << Name 651 << '\n'; 652 } 653 } 654 } 655 656 static void PrintUnwindInfo(const ObjectFile *o) { 657 outs() << "Unwind info:\n\n"; 658 659 if (const COFFObjectFile *coff = dyn_cast<COFFObjectFile>(o)) { 660 printCOFFUnwindInfo(coff); 661 } else { 662 // TODO: Extract DWARF dump tool to objdump. 663 errs() << "This operation is only currently supported " 664 "for COFF object files.\n"; 665 return; 666 } 667 } 668 669 static void DumpObject(const ObjectFile *o) { 670 outs() << '\n'; 671 outs() << o->getFileName() 672 << ":\tfile format " << o->getFileFormatName() << "\n\n"; 673 674 if (Disassemble) 675 DisassembleObject(o, Relocations); 676 if (Relocations && !Disassemble) 677 PrintRelocations(o); 678 if (SectionHeaders) 679 PrintSectionHeaders(o); 680 if (SectionContents) 681 PrintSectionContents(o); 682 if (SymbolTable) 683 PrintSymbolTable(o); 684 if (UnwindInfo) 685 PrintUnwindInfo(o); 686 if (PrivateHeaders && o->isELF()) 687 printELFFileHeader(o); 688 } 689 690 /// @brief Dump each object file in \a a; 691 static void DumpArchive(const Archive *a) { 692 for (Archive::child_iterator i = a->begin_children(), 693 e = a->end_children(); i != e; ++i) { 694 OwningPtr<Binary> child; 695 if (error_code ec = i->getAsBinary(child)) { 696 // Ignore non-object files. 697 if (ec != object_error::invalid_file_type) 698 errs() << ToolName << ": '" << a->getFileName() << "': " << ec.message() 699 << ".\n"; 700 continue; 701 } 702 if (ObjectFile *o = dyn_cast<ObjectFile>(child.get())) 703 DumpObject(o); 704 else 705 errs() << ToolName << ": '" << a->getFileName() << "': " 706 << "Unrecognized file type.\n"; 707 } 708 } 709 710 /// @brief Open file and figure out how to dump it. 711 static void DumpInput(StringRef file) { 712 // If file isn't stdin, check that it exists. 713 if (file != "-" && !sys::fs::exists(file)) { 714 errs() << ToolName << ": '" << file << "': " << "No such file\n"; 715 return; 716 } 717 718 if (MachOOpt && Disassemble) { 719 DisassembleInputMachO(file); 720 return; 721 } 722 723 // Attempt to open the binary. 724 OwningPtr<Binary> binary; 725 if (error_code ec = createBinary(file, binary)) { 726 errs() << ToolName << ": '" << file << "': " << ec.message() << ".\n"; 727 return; 728 } 729 730 if (Archive *a = dyn_cast<Archive>(binary.get())) 731 DumpArchive(a); 732 else if (ObjectFile *o = dyn_cast<ObjectFile>(binary.get())) 733 DumpObject(o); 734 else 735 errs() << ToolName << ": '" << file << "': " << "Unrecognized file type.\n"; 736 } 737 738 int main(int argc, char **argv) { 739 // Print a stack trace if we signal out. 740 sys::PrintStackTraceOnErrorSignal(); 741 PrettyStackTraceProgram X(argc, argv); 742 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 743 744 // Initialize targets and assembly printers/parsers. 745 llvm::InitializeAllTargetInfos(); 746 llvm::InitializeAllTargetMCs(); 747 llvm::InitializeAllAsmParsers(); 748 llvm::InitializeAllDisassemblers(); 749 750 // Register the target printer for --version. 751 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion); 752 753 cl::ParseCommandLineOptions(argc, argv, "llvm object file dumper\n"); 754 TripleName = Triple::normalize(TripleName); 755 756 ToolName = argv[0]; 757 758 // Defaults to a.out if no filenames specified. 759 if (InputFilenames.size() == 0) 760 InputFilenames.push_back("a.out"); 761 762 if (!Disassemble 763 && !Relocations 764 && !SectionHeaders 765 && !SectionContents 766 && !SymbolTable 767 && !UnwindInfo 768 && !PrivateHeaders) { 769 cl::PrintHelpMessage(); 770 return 2; 771 } 772 773 std::for_each(InputFilenames.begin(), InputFilenames.end(), 774 DumpInput); 775 776 return 0; 777 } 778