src/llvm/tools/llvm-objdump/llvm-objdump.cpp

   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 }