llvm-objdump.cpp revision cef81b37c77978cd4dddb4a5ad13564793ded155 
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>
53using namespace llvm;
54using namespace object;
55
56static cl::list<std::string>
57InputFilenames(cl::Positional, cl::desc("<input object files>"),cl::ZeroOrMore);
58
59static cl::opt<bool>
60Disassemble("disassemble",
61  cl::desc("Display assembler mnemonics for the machine instructions"));
62static cl::alias
63Disassembled("d", cl::desc("Alias for --disassemble"),
64             cl::aliasopt(Disassemble));
65
66static cl::opt<bool>
67Relocations("r", cl::desc("Display the relocation entries in the file"));
68
69static cl::opt<bool>
70SectionContents("s", cl::desc("Display the content of each section"));
71
72static cl::opt<bool>
73SymbolTable("t", cl::desc("Display the symbol table"));
74
75static cl::opt<bool>
76MachOOpt("macho", cl::desc("Use MachO specific object file parser"));
77static cl::alias
78MachOm("m", cl::desc("Alias for --macho"), cl::aliasopt(MachOOpt));
79
80cl::opt<std::string>
81llvm::TripleName("triple", cl::desc("Target triple to disassemble for, "
82                                    "see -version for available targets"));
83
84cl::opt<std::string>
85llvm::ArchName("arch", cl::desc("Target arch to disassemble for, "
86                                "see -version for available targets"));
87
88static cl::opt<bool>
89SectionHeaders("section-headers", cl::desc("Display summaries of the headers "
90                                           "for each section."));
91static cl::alias
92SectionHeadersShort("headers", cl::desc("Alias for --section-headers"),
93                    cl::aliasopt(SectionHeaders));
94static cl::alias
95SectionHeadersShorter("h", cl::desc("Alias for --section-headers"),
96                      cl::aliasopt(SectionHeaders));
97
98static cl::list<std::string>
99MAttrs("mattr",
100  cl::CommaSeparated,
101  cl::desc("Target specific attributes"),
102  cl::value_desc("a1,+a2,-a3,..."));
103
104static cl::opt<bool>
105NoShowRawInsn("no-show-raw-insn", cl::desc("When disassembling instructions, "
106                                           "do not print the instruction bytes."));
107
108static cl::opt<bool>
109UnwindInfo("unwind-info", cl::desc("Display unwind information"));
110
111static cl::alias
112UnwindInfoShort("u", cl::desc("Alias for --unwind-info"),
113                cl::aliasopt(UnwindInfo));
114
115static StringRef ToolName;
116
117bool 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
125static 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
148void llvm::StringRefMemoryObject::anchor() { }
149
150void 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
176bool 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
183static 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 SegmentName = "";
246    if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(Obj)) {
247      DataRefImpl DR = i->getRawDataRefImpl();
248      if (error(MachO->getSectionFinalSegmentName(DR, SegmentName)))
249        break;
250    }
251    StringRef name;
252    if (error(i->getName(name))) break;
253    outs() << "Disassembly of section ";
254    if (!SegmentName.empty())
255      outs() << SegmentName << ",";
256    outs() << name << ':';
257
258    // If the section has no symbols just insert a dummy one and disassemble
259    // the whole section.
260    if (Symbols.empty())
261      Symbols.push_back(std::make_pair(0, name));
262
263    // Set up disassembler.
264    OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName));
265
266    if (!AsmInfo) {
267      errs() << "error: no assembly info for target " << TripleName << "\n";
268      return;
269    }
270
271    OwningPtr<const MCSubtargetInfo> STI(
272      TheTarget->createMCSubtargetInfo(TripleName, "", FeaturesStr));
273
274    if (!STI) {
275      errs() << "error: no subtarget info for target " << TripleName << "\n";
276      return;
277    }
278
279    OwningPtr<const MCDisassembler> DisAsm(
280      TheTarget->createMCDisassembler(*STI));
281    if (!DisAsm) {
282      errs() << "error: no disassembler for target " << TripleName << "\n";
283      return;
284    }
285
286    OwningPtr<const MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
287    if (!MRI) {
288      errs() << "error: no register info for target " << TripleName << "\n";
289      return;
290    }
291
292    OwningPtr<const MCInstrInfo> MII(TheTarget->createMCInstrInfo());
293    if (!MII) {
294      errs() << "error: no instruction info for target " << TripleName << "\n";
295      return;
296    }
297
298    int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
299    OwningPtr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
300                                AsmPrinterVariant, *AsmInfo, *MII, *MRI, *STI));
301    if (!IP) {
302      errs() << "error: no instruction printer for target " << TripleName
303             << '\n';
304      return;
305    }
306
307    StringRef Bytes;
308    if (error(i->getContents(Bytes))) break;
309    StringRefMemoryObject memoryObject(Bytes);
310    uint64_t Size;
311    uint64_t Index;
312    uint64_t SectSize;
313    if (error(i->getSize(SectSize))) break;
314
315    std::vector<RelocationRef>::const_iterator rel_cur = Rels.begin();
316    std::vector<RelocationRef>::const_iterator rel_end = Rels.end();
317    // Disassemble symbol by symbol.
318    for (unsigned si = 0, se = Symbols.size(); si != se; ++si) {
319      uint64_t Start = Symbols[si].first;
320      uint64_t End;
321      // The end is either the size of the section or the beginning of the next
322      // symbol.
323      if (si == se - 1)
324        End = SectSize;
325      // Make sure this symbol takes up space.
326      else if (Symbols[si + 1].first != Start)
327        End = Symbols[si + 1].first - 1;
328      else
329        // This symbol has the same address as the next symbol. Skip it.
330        continue;
331
332      outs() << '\n' << Symbols[si].second << ":\n";
333
334#ifndef NDEBUG
335        raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
336#else
337        raw_ostream &DebugOut = nulls();
338#endif
339
340      for (Index = Start; Index < End; Index += Size) {
341        MCInst Inst;
342
343        if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
344                                   DebugOut, nulls())) {
345          outs() << format("%8" PRIx64 ":", SectionAddr + Index);
346          if (!NoShowRawInsn) {
347            outs() << "\t";
348            DumpBytes(StringRef(Bytes.data() + Index, Size));
349          }
350          IP->printInst(&Inst, outs(), "");
351          outs() << "\n";
352        } else {
353          errs() << ToolName << ": warning: invalid instruction encoding\n";
354          if (Size == 0)
355            Size = 1; // skip illegible bytes
356        }
357
358        // Print relocation for instruction.
359        while (rel_cur != rel_end) {
360          bool hidden = false;
361          uint64_t addr;
362          SmallString<16> name;
363          SmallString<32> val;
364
365          // If this relocation is hidden, skip it.
366          if (error(rel_cur->getHidden(hidden))) goto skip_print_rel;
367          if (hidden) goto skip_print_rel;
368
369          if (error(rel_cur->getAddress(addr))) goto skip_print_rel;
370          // Stop when rel_cur's address is past the current instruction.
371          if (addr >= Index + Size) break;
372          if (error(rel_cur->getTypeName(name))) goto skip_print_rel;
373          if (error(rel_cur->getValueString(val))) goto skip_print_rel;
374
375          outs() << format("\t\t\t%8" PRIx64 ": ", SectionAddr + addr) << name
376                 << "\t" << val << "\n";
377
378        skip_print_rel:
379          ++rel_cur;
380        }
381      }
382    }
383  }
384}
385
386static void PrintRelocations(const ObjectFile *o) {
387  error_code ec;
388  for (section_iterator si = o->begin_sections(), se = o->end_sections();
389                                                  si != se; si.increment(ec)){
390    if (error(ec)) return;
391    if (si->begin_relocations() == si->end_relocations())
392      continue;
393    StringRef secname;
394    if (error(si->getName(secname))) continue;
395    outs() << "RELOCATION RECORDS FOR [" << secname << "]:\n";
396    for (relocation_iterator ri = si->begin_relocations(),
397                             re = si->end_relocations();
398                             ri != re; ri.increment(ec)) {
399      if (error(ec)) return;
400
401      bool hidden;
402      uint64_t address;
403      SmallString<32> relocname;
404      SmallString<32> valuestr;
405      if (error(ri->getHidden(hidden))) continue;
406      if (hidden) continue;
407      if (error(ri->getTypeName(relocname))) continue;
408      if (error(ri->getAddress(address))) continue;
409      if (error(ri->getValueString(valuestr))) continue;
410      outs() << address << " " << relocname << " " << valuestr << "\n";
411    }
412    outs() << "\n";
413  }
414}
415
416static void PrintSectionHeaders(const ObjectFile *o) {
417  outs() << "Sections:\n"
418            "Idx Name          Size      Address          Type\n";
419  error_code ec;
420  unsigned i = 0;
421  for (section_iterator si = o->begin_sections(), se = o->end_sections();
422                                                  si != se; si.increment(ec)) {
423    if (error(ec)) return;
424    StringRef Name;
425    if (error(si->getName(Name))) return;
426    uint64_t Address;
427    if (error(si->getAddress(Address))) return;
428    uint64_t Size;
429    if (error(si->getSize(Size))) return;
430    bool Text, Data, BSS;
431    if (error(si->isText(Text))) return;
432    if (error(si->isData(Data))) return;
433    if (error(si->isBSS(BSS))) return;
434    std::string Type = (std::string(Text ? "TEXT " : "") +
435                        (Data ? "DATA " : "") + (BSS ? "BSS" : ""));
436    outs() << format("%3d %-13s %09" PRIx64 " %017" PRIx64 " %s\n",
437                     i, Name.str().c_str(), Size, Address, Type.c_str());
438    ++i;
439  }
440}
441
442static void PrintSectionContents(const ObjectFile *o) {
443  error_code ec;
444  for (section_iterator si = o->begin_sections(),
445                        se = o->end_sections();
446                        si != se; si.increment(ec)) {
447    if (error(ec)) return;
448    StringRef Name;
449    StringRef Contents;
450    uint64_t BaseAddr;
451    if (error(si->getName(Name))) continue;
452    if (error(si->getContents(Contents))) continue;
453    if (error(si->getAddress(BaseAddr))) continue;
454
455    outs() << "Contents of section " << Name << ":\n";
456
457    // Dump out the content as hex and printable ascii characters.
458    for (std::size_t addr = 0, end = Contents.size(); addr < end; addr += 16) {
459      outs() << format(" %04" PRIx64 " ", BaseAddr + addr);
460      // Dump line of hex.
461      for (std::size_t i = 0; i < 16; ++i) {
462        if (i != 0 && i % 4 == 0)
463          outs() << ' ';
464        if (addr + i < end)
465          outs() << hexdigit((Contents[addr + i] >> 4) & 0xF, true)
466                 << hexdigit(Contents[addr + i] & 0xF, true);
467        else
468          outs() << "  ";
469      }
470      // Print ascii.
471      outs() << "  ";
472      for (std::size_t i = 0; i < 16 && addr + i < end; ++i) {
473        if (std::isprint(Contents[addr + i] & 0xFF))
474          outs() << Contents[addr + i];
475        else
476          outs() << ".";
477      }
478      outs() << "\n";
479    }
480  }
481}
482
483static void PrintCOFFSymbolTable(const COFFObjectFile *coff) {
484  const coff_file_header *header;
485  if (error(coff->getHeader(header))) return;
486  int aux_count = 0;
487  const coff_symbol *symbol = 0;
488  for (int i = 0, e = header->NumberOfSymbols; i != e; ++i) {
489    if (aux_count--) {
490      // Figure out which type of aux this is.
491      if (symbol->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC
492          && symbol->Value == 0) { // Section definition.
493        const coff_aux_section_definition *asd;
494        if (error(coff->getAuxSymbol<coff_aux_section_definition>(i, asd)))
495          return;
496        outs() << "AUX "
497               << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x "
498                         , unsigned(asd->Length)
499                         , unsigned(asd->NumberOfRelocations)
500                         , unsigned(asd->NumberOfLinenumbers)
501                         , unsigned(asd->CheckSum))
502               << format("assoc %d comdat %d\n"
503                         , unsigned(asd->Number)
504                         , unsigned(asd->Selection));
505      } else
506        outs() << "AUX Unknown\n";
507    } else {
508      StringRef name;
509      if (error(coff->getSymbol(i, symbol))) return;
510      if (error(coff->getSymbolName(symbol, name))) return;
511      outs() << "[" << format("%2d", i) << "]"
512             << "(sec " << format("%2d", int(symbol->SectionNumber)) << ")"
513             << "(fl 0x00)" // Flag bits, which COFF doesn't have.
514             << "(ty " << format("%3x", unsigned(symbol->Type)) << ")"
515             << "(scl " << format("%3x", unsigned(symbol->StorageClass)) << ") "
516             << "(nx " << unsigned(symbol->NumberOfAuxSymbols) << ") "
517             << "0x" << format("%08x", unsigned(symbol->Value)) << " "
518             << name << "\n";
519      aux_count = symbol->NumberOfAuxSymbols;
520    }
521  }
522}
523
524static void PrintSymbolTable(const ObjectFile *o) {
525  outs() << "SYMBOL TABLE:\n";
526
527  if (const COFFObjectFile *coff = dyn_cast<const COFFObjectFile>(o))
528    PrintCOFFSymbolTable(coff);
529  else {
530    error_code ec;
531    for (symbol_iterator si = o->begin_symbols(),
532                         se = o->end_symbols(); si != se; si.increment(ec)) {
533      if (error(ec)) return;
534      StringRef Name;
535      uint64_t Address;
536      SymbolRef::Type Type;
537      uint64_t Size;
538      uint32_t Flags;
539      section_iterator Section = o->end_sections();
540      if (error(si->getName(Name))) continue;
541      if (error(si->getAddress(Address))) continue;
542      if (error(si->getFlags(Flags))) continue;
543      if (error(si->getType(Type))) continue;
544      if (error(si->getSize(Size))) continue;
545      if (error(si->getSection(Section))) continue;
546
547      bool Global = Flags & SymbolRef::SF_Global;
548      bool Weak = Flags & SymbolRef::SF_Weak;
549      bool Absolute = Flags & SymbolRef::SF_Absolute;
550
551      if (Address == UnknownAddressOrSize)
552        Address = 0;
553      if (Size == UnknownAddressOrSize)
554        Size = 0;
555      char GlobLoc = ' ';
556      if (Type != SymbolRef::ST_Unknown)
557        GlobLoc = Global ? 'g' : 'l';
558      char Debug = (Type == SymbolRef::ST_Debug || Type == SymbolRef::ST_File)
559                   ? 'd' : ' ';
560      char FileFunc = ' ';
561      if (Type == SymbolRef::ST_File)
562        FileFunc = 'f';
563      else if (Type == SymbolRef::ST_Function)
564        FileFunc = 'F';
565
566      outs() << format("%08" PRIx64, Address) << " "
567             << GlobLoc // Local -> 'l', Global -> 'g', Neither -> ' '
568             << (Weak ? 'w' : ' ') // Weak?
569             << ' ' // Constructor. Not supported yet.
570             << ' ' // Warning. Not supported yet.
571             << ' ' // Indirect reference to another symbol.
572             << Debug // Debugging (d) or dynamic (D) symbol.
573             << FileFunc // Name of function (F), file (f) or object (O).
574             << ' ';
575      if (Absolute)
576        outs() << "*ABS*";
577      else if (Section == o->end_sections())
578        outs() << "*UND*";
579      else {
580        if (const MachOObjectFile *MachO = dyn_cast<const MachOObjectFile>(o)) {
581          StringRef SegmentName;
582          DataRefImpl DR = Section->getRawDataRefImpl();
583          if (error(MachO->getSectionFinalSegmentName(DR, SegmentName)))
584            SegmentName = "";
585          outs() << SegmentName << ",";
586        }
587        StringRef SectionName;
588        if (error(Section->getName(SectionName)))
589          SectionName = "";
590        outs() << SectionName;
591      }
592      outs() << '\t'
593             << format("%08" PRIx64 " ", Size)
594             << Name
595             << '\n';
596    }
597  }
598}
599
600static void PrintUnwindInfo(const ObjectFile *o) {
601  outs() << "Unwind info:\n\n";
602
603  if (const COFFObjectFile *coff = dyn_cast<COFFObjectFile>(o)) {
604    printCOFFUnwindInfo(coff);
605  } else {
606    // TODO: Extract DWARF dump tool to objdump.
607    errs() << "This operation is only currently supported "
608              "for COFF object files.\n";
609    return;
610  }
611}
612
613static void DumpObject(const ObjectFile *o) {
614  outs() << '\n';
615  outs() << o->getFileName()
616         << ":\tfile format " << o->getFileFormatName() << "\n\n";
617
618  if (Disassemble)
619    DisassembleObject(o, Relocations);
620  if (Relocations && !Disassemble)
621    PrintRelocations(o);
622  if (SectionHeaders)
623    PrintSectionHeaders(o);
624  if (SectionContents)
625    PrintSectionContents(o);
626  if (SymbolTable)
627    PrintSymbolTable(o);
628  if (UnwindInfo)
629    PrintUnwindInfo(o);
630}
631
632/// @brief Dump each object file in \a a;
633static void DumpArchive(const Archive *a) {
634  for (Archive::child_iterator i = a->begin_children(),
635                               e = a->end_children(); i != e; ++i) {
636    OwningPtr<Binary> child;
637    if (error_code ec = i->getAsBinary(child)) {
638      // Ignore non-object files.
639      if (ec != object_error::invalid_file_type)
640        errs() << ToolName << ": '" << a->getFileName() << "': " << ec.message()
641               << ".\n";
642      continue;
643    }
644    if (ObjectFile *o = dyn_cast<ObjectFile>(child.get()))
645      DumpObject(o);
646    else
647      errs() << ToolName << ": '" << a->getFileName() << "': "
648              << "Unrecognized file type.\n";
649  }
650}
651
652/// @brief Open file and figure out how to dump it.
653static void DumpInput(StringRef file) {
654  // If file isn't stdin, check that it exists.
655  if (file != "-" && !sys::fs::exists(file)) {
656    errs() << ToolName << ": '" << file << "': " << "No such file\n";
657    return;
658  }
659
660  if (MachOOpt && Disassemble) {
661    DisassembleInputMachO(file);
662    return;
663  }
664
665  // Attempt to open the binary.
666  OwningPtr<Binary> binary;
667  if (error_code ec = createBinary(file, binary)) {
668    errs() << ToolName << ": '" << file << "': " << ec.message() << ".\n";
669    return;
670  }
671
672  if (Archive *a = dyn_cast<Archive>(binary.get()))
673    DumpArchive(a);
674  else if (ObjectFile *o = dyn_cast<ObjectFile>(binary.get()))
675    DumpObject(o);
676  else
677    errs() << ToolName << ": '" << file << "': " << "Unrecognized file type.\n";
678}
679
680int main(int argc, char **argv) {
681  // Print a stack trace if we signal out.
682  sys::PrintStackTraceOnErrorSignal();
683  PrettyStackTraceProgram X(argc, argv);
684  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
685
686  // Initialize targets and assembly printers/parsers.
687  llvm::InitializeAllTargetInfos();
688  llvm::InitializeAllTargetMCs();
689  llvm::InitializeAllAsmParsers();
690  llvm::InitializeAllDisassemblers();
691
692  // Register the target printer for --version.
693  cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
694
695  cl::ParseCommandLineOptions(argc, argv, "llvm object file dumper\n");
696  TripleName = Triple::normalize(TripleName);
697
698  ToolName = argv[0];
699
700  // Defaults to a.out if no filenames specified.
701  if (InputFilenames.size() == 0)
702    InputFilenames.push_back("a.out");
703
704  if (!Disassemble
705      && !Relocations
706      && !SectionHeaders
707      && !SectionContents
708      && !SymbolTable
709      && !UnwindInfo) {
710    cl::PrintHelpMessage();
711    return 2;
712  }
713
714  std::for_each(InputFilenames.begin(), InputFilenames.end(),
715                DumpInput);
716
717  return 0;
718}
719