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