xref: /llvm-project/llvm/tools/llvm-readobj/llvm-readobj.cpp (revision 16a0de2e555856444ff4037375bc8f9c024d36af) 
1 //===- llvm-readobj.cpp - Dump contents of an Object File -----------------===//
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 is a tool similar to readelf, except it works on multiple object file
11 // formats. The main purpose of this tool is to provide detailed output suitable
12 // for FileCheck.
13 //
14 // Flags should be similar to readelf where supported, but the output format
15 // does not need to be identical. The point is to not make users learn yet
16 // another set of flags.
17 //
18 // Output should be specialized for each format where appropriate.
19 //
20 //===----------------------------------------------------------------------===//
21 
22 #include "llvm-readobj.h"
23 #include "Error.h"
24 #include "ObjDumper.h"
25 #include "WindowsResourceDumper.h"
26 #include "llvm/DebugInfo/CodeView/MergingTypeTableBuilder.h"
27 #include "llvm/Object/Archive.h"
28 #include "llvm/Object/COFFImportFile.h"
29 #include "llvm/Object/MachOUniversal.h"
30 #include "llvm/Object/ObjectFile.h"
31 #include "llvm/Object/WindowsResource.h"
32 #include "llvm/Support/Casting.h"
33 #include "llvm/Support/CommandLine.h"
34 #include "llvm/Support/DataTypes.h"
35 #include "llvm/Support/Debug.h"
36 #include "llvm/Support/FileSystem.h"
37 #include "llvm/Support/FormatVariadic.h"
38 #include "llvm/Support/InitLLVM.h"
39 #include "llvm/Support/Path.h"
40 #include "llvm/Support/ScopedPrinter.h"
41 #include "llvm/Support/TargetRegistry.h"
42 
43 using namespace llvm;
44 using namespace llvm::object;
45 
46 namespace opts {
47   cl::list<std::string> InputFilenames(cl::Positional,
48     cl::desc("<input object files>"),
49     cl::ZeroOrMore);
50 
51   // -all, -a
52   cl::opt<bool>
53       All("all",
54           cl::desc("Equivalent to setting: --file-headers, --program-headers, "
55                    "--section-headers, --symbols, --relocations, "
56                    "--dynamic-table, --notes, --version-info, --unwind, "
57                    "--section-groups and --elf-hash-histogram."));
58   cl::alias AllShort("a", cl::desc("Alias for --all"), cl::aliasopt(All));
59 
60   // --headers -e
61   cl::opt<bool>
62       Headers("headers",
63           cl::desc("Equivalent to setting: --file-headers, --program-headers, "
64                    "--section-headers"));
65   cl::alias HeadersShort("e", cl::desc("Alias for --headers"),
66      cl::aliasopt(Headers));
67 
68   // -wide, -W
69   cl::opt<bool>
70       WideOutput("wide", cl::desc("Ignored for compatibility with GNU readelf"),
71                  cl::Hidden);
72   cl::alias WideOutputShort("W",
73     cl::desc("Alias for --wide"),
74     cl::aliasopt(WideOutput));
75 
76   // -file-headers, -file-header, -h
77   cl::opt<bool> FileHeaders("file-headers",
78     cl::desc("Display file headers "));
79   cl::alias FileHeadersShort("h", cl::desc("Alias for --file-headers"),
80                              cl::aliasopt(FileHeaders), cl::NotHidden);
81   cl::alias FileHeadersSingular("file-header",
82                                 cl::desc("Alias for --file-headers"),
83                                 cl::aliasopt(FileHeaders));
84 
85   // -section-headers, -sections, -S
86   // Also -s in llvm-readobj mode.
87   cl::opt<bool> SectionHeaders("section-headers",
88                                cl::desc("Display all section headers."));
89   cl::alias SectionsShortUpper("S", cl::desc("Alias for --section-headers"),
90                                cl::aliasopt(SectionHeaders), cl::NotHidden);
91   cl::alias SectionHeadersAlias("sections",
92                                 cl::desc("Alias for --section-headers"),
93                                 cl::aliasopt(SectionHeaders), cl::NotHidden);
94 
95   // -section-relocations, -sr
96   cl::opt<bool> SectionRelocations("section-relocations",
97     cl::desc("Display relocations for each section shown."));
98   cl::alias SectionRelocationsShort("sr",
99     cl::desc("Alias for --section-relocations"),
100     cl::aliasopt(SectionRelocations));
101 
102   // -section-symbols, -st
103   cl::opt<bool> SectionSymbols("section-symbols",
104     cl::desc("Display symbols for each section shown."));
105   cl::alias SectionSymbolsShort("st",
106     cl::desc("Alias for --section-symbols"),
107     cl::aliasopt(SectionSymbols));
108 
109   // -section-data, -sd
110   cl::opt<bool> SectionData("section-data",
111     cl::desc("Display section data for each section shown."));
112   cl::alias SectionDataShort("sd",
113     cl::desc("Alias for --section-data"),
114     cl::aliasopt(SectionData));
115 
116   // -relocations, -relocs, -r
117   cl::opt<bool> Relocations("relocations",
118     cl::desc("Display the relocation entries in the file"));
119   cl::alias RelocationsShort("r", cl::desc("Alias for --relocations"),
120                              cl::aliasopt(Relocations), cl::NotHidden);
121   cl::alias RelocationsGNU("relocs", cl::desc("Alias for --relocations"),
122                            cl::aliasopt(Relocations));
123 
124   // -notes, -n
125   cl::opt<bool> Notes("notes", cl::desc("Display the ELF notes in the file"));
126   cl::alias NotesShort("n", cl::desc("Alias for --notes"), cl::aliasopt(Notes));
127 
128   // -dyn-relocations
129   cl::opt<bool> DynRelocs("dyn-relocations",
130     cl::desc("Display the dynamic relocation entries in the file"));
131 
132   // -symbols
133   // Also -s in llvm-readelf mode, or -t in llvm-readobj mode.
134   cl::opt<bool> Symbols("symbols",
135     cl::desc("Display the symbol table"));
136   cl::alias SymbolsGNU("syms", cl::desc("Alias for --symbols"),
137                        cl::aliasopt(Symbols));
138 
139   // -dyn-symbols, -dyn-syms, -dt
140   cl::opt<bool> DynamicSymbols("dyn-symbols",
141     cl::desc("Display the dynamic symbol table"));
142   cl::alias DynamicSymbolsShort("dt",
143     cl::desc("Alias for --dyn-symbols"),
144     cl::aliasopt(DynamicSymbols));
145   cl::alias DynSymsGNU("dyn-syms", cl::desc("Alias for --dyn-symbols"),
146                        cl::aliasopt(DynamicSymbols));
147 
148   // -unwind, -u
149   cl::opt<bool> UnwindInfo("unwind",
150     cl::desc("Display unwind information"));
151   cl::alias UnwindInfoShort("u",
152     cl::desc("Alias for --unwind"),
153     cl::aliasopt(UnwindInfo));
154 
155   // -dynamic-table, -dynamic, -d
156   cl::opt<bool> DynamicTable("dynamic-table",
157     cl::desc("Display the ELF .dynamic section table"));
158   cl::alias DynamicTableShort("d", cl::desc("Alias for --dynamic-table"),
159                               cl::aliasopt(DynamicTable), cl::NotHidden);
160   cl::alias DynamicTableAlias("dynamic", cl::desc("Alias for --dynamic-table"),
161                               cl::aliasopt(DynamicTable));
162 
163   // -needed-libs
164   cl::opt<bool> NeededLibraries("needed-libs",
165     cl::desc("Display the needed libraries"));
166 
167   // -program-headers, -segments, -l
168   cl::opt<bool> ProgramHeaders("program-headers",
169     cl::desc("Display ELF program headers"));
170   cl::alias ProgramHeadersShort("l", cl::desc("Alias for --program-headers"),
171                                 cl::aliasopt(ProgramHeaders), cl::NotHidden);
172   cl::alias SegmentsAlias("segments", cl::desc("Alias for --program-headers"),
173                           cl::aliasopt(ProgramHeaders));
174 
175   // -string-dump, -p
176   cl::list<std::string> StringDump("string-dump", cl::desc("<number|name>"),
177                                    cl::ZeroOrMore);
178   cl::alias StringDumpShort("p", cl::desc("Alias for --string-dump"),
179                             cl::aliasopt(StringDump));
180 
181   // -hex-dump, -x
182   cl::list<std::string> HexDump("hex-dump", cl::desc("<number|name>"),
183                                 cl::ZeroOrMore);
184   cl::alias HexDumpShort("x", cl::desc("Alias for --hex-dump"),
185                          cl::aliasopt(HexDump));
186 
187   // -hash-table
188   cl::opt<bool> HashTable("hash-table",
189     cl::desc("Display ELF hash table"));
190 
191   // -gnu-hash-table
192   cl::opt<bool> GnuHashTable("gnu-hash-table",
193     cl::desc("Display ELF .gnu.hash section"));
194 
195   // -expand-relocs
196   cl::opt<bool> ExpandRelocs("expand-relocs",
197     cl::desc("Expand each shown relocation to multiple lines"));
198 
199   // -raw-relr
200   cl::opt<bool> RawRelr("raw-relr",
201     cl::desc("Do not decode relocations in SHT_RELR section, display raw contents"));
202 
203   // -codeview
204   cl::opt<bool> CodeView("codeview",
205                          cl::desc("Display CodeView debug information"));
206 
207   // -codeview-merged-types
208   cl::opt<bool>
209       CodeViewMergedTypes("codeview-merged-types",
210                           cl::desc("Display the merged CodeView type stream"));
211 
212   // -codeview-subsection-bytes
213   cl::opt<bool> CodeViewSubsectionBytes(
214       "codeview-subsection-bytes",
215       cl::desc("Dump raw contents of codeview debug sections and records"));
216 
217   // -arm-attributes
218   cl::opt<bool> ARMAttributes("arm-attributes",
219                               cl::desc("Display the ARM attributes section"));
220 
221   // -mips-plt-got
222   cl::opt<bool>
223   MipsPLTGOT("mips-plt-got",
224              cl::desc("Display the MIPS GOT and PLT GOT sections"));
225 
226   // -mips-abi-flags
227   cl::opt<bool> MipsABIFlags("mips-abi-flags",
228                              cl::desc("Display the MIPS.abiflags section"));
229 
230   // -mips-reginfo
231   cl::opt<bool> MipsReginfo("mips-reginfo",
232                             cl::desc("Display the MIPS .reginfo section"));
233 
234   // -mips-options
235   cl::opt<bool> MipsOptions("mips-options",
236                             cl::desc("Display the MIPS .MIPS.options section"));
237 
238   // -coff-imports
239   cl::opt<bool>
240   COFFImports("coff-imports", cl::desc("Display the PE/COFF import table"));
241 
242   // -coff-exports
243   cl::opt<bool>
244   COFFExports("coff-exports", cl::desc("Display the PE/COFF export table"));
245 
246   // -coff-directives
247   cl::opt<bool>
248   COFFDirectives("coff-directives",
249                  cl::desc("Display the PE/COFF .drectve section"));
250 
251   // -coff-basereloc
252   cl::opt<bool>
253   COFFBaseRelocs("coff-basereloc",
254                  cl::desc("Display the PE/COFF .reloc section"));
255 
256   // -coff-debug-directory
257   cl::opt<bool>
258   COFFDebugDirectory("coff-debug-directory",
259                      cl::desc("Display the PE/COFF debug directory"));
260 
261   // -coff-resources
262   cl::opt<bool> COFFResources("coff-resources",
263                               cl::desc("Display the PE/COFF .rsrc section"));
264 
265   // -coff-load-config
266   cl::opt<bool>
267   COFFLoadConfig("coff-load-config",
268                  cl::desc("Display the PE/COFF load config"));
269 
270   // -elf-linker-options
271   cl::opt<bool>
272   ELFLinkerOptions("elf-linker-options",
273                    cl::desc("Display the ELF .linker-options section"));
274 
275   // -macho-data-in-code
276   cl::opt<bool>
277   MachODataInCode("macho-data-in-code",
278                   cl::desc("Display MachO Data in Code command"));
279 
280   // -macho-indirect-symbols
281   cl::opt<bool>
282   MachOIndirectSymbols("macho-indirect-symbols",
283                   cl::desc("Display MachO indirect symbols"));
284 
285   // -macho-linker-options
286   cl::opt<bool>
287   MachOLinkerOptions("macho-linker-options",
288                   cl::desc("Display MachO linker options"));
289 
290   // -macho-segment
291   cl::opt<bool>
292   MachOSegment("macho-segment",
293                   cl::desc("Display MachO Segment command"));
294 
295   // -macho-version-min
296   cl::opt<bool>
297   MachOVersionMin("macho-version-min",
298                   cl::desc("Display MachO version min command"));
299 
300   // -macho-dysymtab
301   cl::opt<bool>
302   MachODysymtab("macho-dysymtab",
303                   cl::desc("Display MachO Dysymtab command"));
304 
305   // -stackmap
306   cl::opt<bool>
307   PrintStackMap("stackmap",
308                 cl::desc("Display contents of stackmap section"));
309 
310   // -version-info, -V
311   cl::opt<bool>
312       VersionInfo("version-info",
313                   cl::desc("Display ELF version sections (if present)"));
314   cl::alias VersionInfoShort("V", cl::desc("Alias for -version-info"),
315                              cl::aliasopt(VersionInfo));
316 
317   // -elf-section-groups, -section-groups, -g
318   cl::opt<bool> SectionGroups("elf-section-groups",
319                               cl::desc("Display ELF section group contents"));
320   cl::alias SectionGroupsAlias("section-groups",
321                                cl::desc("Alias for -elf-sections-groups"),
322                                cl::aliasopt(SectionGroups));
323   cl::alias SectionGroupsShort("g", cl::desc("Alias for -elf-sections-groups"),
324                                cl::aliasopt(SectionGroups));
325 
326   // -elf-hash-histogram, -histogram, -I
327   cl::opt<bool> HashHistogram(
328       "elf-hash-histogram",
329       cl::desc("Display bucket list histogram for hash sections"));
330   cl::alias HashHistogramShort("I", cl::desc("Alias for -elf-hash-histogram"),
331                                cl::aliasopt(HashHistogram));
332   cl::alias HistogramAlias("histogram",
333                            cl::desc("Alias for --elf-hash-histogram"),
334                            cl::aliasopt(HashHistogram));
335 
336   // -elf-cg-profile
337   cl::opt<bool> CGProfile("elf-cg-profile", cl::desc("Display callgraph profile section"));
338 
339   // -addrsig
340   cl::opt<bool> Addrsig("addrsig",
341                         cl::desc("Display address-significance table"));
342 
343   // -elf-output-style
344   cl::opt<OutputStyleTy>
345       Output("elf-output-style", cl::desc("Specify ELF dump style"),
346              cl::values(clEnumVal(LLVM, "LLVM default style"),
347                         clEnumVal(GNU, "GNU readelf style")),
348              cl::init(LLVM));
349 } // namespace opts
350 
351 namespace llvm {
352 
353 LLVM_ATTRIBUTE_NORETURN void reportError(Twine Msg) {
354   errs() << "\nError reading file: " << Msg << ".\n";
355   errs().flush();
356   exit(1);
357 }
358 
359 void error(Error EC) {
360   if (!EC)
361     return;
362   handleAllErrors(std::move(EC),
363                   [&](const ErrorInfoBase &EI) { reportError(EI.message()); });
364 }
365 
366 void error(std::error_code EC) {
367   if (!EC)
368     return;
369   reportError(EC.message());
370 }
371 
372 bool relocAddressLess(RelocationRef a, RelocationRef b) {
373   return a.getOffset() < b.getOffset();
374 }
375 
376 } // namespace llvm
377 
378 static void reportError(StringRef Input, std::error_code EC) {
379   if (Input == "-")
380     Input = "<stdin>";
381 
382   reportError(Twine(Input) + ": " + EC.message());
383 }
384 
385 static void reportError(StringRef Input, Error Err) {
386   if (Input == "-")
387     Input = "<stdin>";
388   std::string ErrMsg;
389   {
390     raw_string_ostream ErrStream(ErrMsg);
391     logAllUnhandledErrors(std::move(Err), ErrStream, Input + ": ");
392   }
393   reportError(ErrMsg);
394 }
395 
396 static bool isMipsArch(unsigned Arch) {
397   switch (Arch) {
398   case llvm::Triple::mips:
399   case llvm::Triple::mipsel:
400   case llvm::Triple::mips64:
401   case llvm::Triple::mips64el:
402     return true;
403   default:
404     return false;
405   }
406 }
407 namespace {
408 struct ReadObjTypeTableBuilder {
409   ReadObjTypeTableBuilder()
410       : Allocator(), IDTable(Allocator), TypeTable(Allocator) {}
411 
412   llvm::BumpPtrAllocator Allocator;
413   llvm::codeview::MergingTypeTableBuilder IDTable;
414   llvm::codeview::MergingTypeTableBuilder TypeTable;
415 };
416 }
417 static ReadObjTypeTableBuilder CVTypes;
418 
419 /// Creates an format-specific object file dumper.
420 static std::error_code createDumper(const ObjectFile *Obj,
421                                     ScopedPrinter &Writer,
422                                     std::unique_ptr<ObjDumper> &Result) {
423   if (!Obj)
424     return readobj_error::unsupported_file_format;
425 
426   if (Obj->isCOFF())
427     return createCOFFDumper(Obj, Writer, Result);
428   if (Obj->isELF())
429     return createELFDumper(Obj, Writer, Result);
430   if (Obj->isMachO())
431     return createMachODumper(Obj, Writer, Result);
432   if (Obj->isWasm())
433     return createWasmDumper(Obj, Writer, Result);
434 
435   return readobj_error::unsupported_obj_file_format;
436 }
437 
438 /// Dumps the specified object file.
439 static void dumpObject(const ObjectFile *Obj, ScopedPrinter &Writer) {
440   std::unique_ptr<ObjDumper> Dumper;
441   if (std::error_code EC = createDumper(Obj, Writer, Dumper))
442     reportError(Obj->getFileName(), EC);
443 
444   if (opts::Output == opts::LLVM) {
445     Writer.startLine() << "\n";
446     Writer.printString("File", Obj->getFileName());
447     Writer.printString("Format", Obj->getFileFormatName());
448     Writer.printString("Arch", Triple::getArchTypeName(
449                                    (llvm::Triple::ArchType)Obj->getArch()));
450     Writer.printString("AddressSize",
451                        formatv("{0}bit", 8 * Obj->getBytesInAddress()));
452     Dumper->printLoadName();
453   }
454 
455   if (opts::FileHeaders)
456     Dumper->printFileHeaders();
457   if (opts::SectionHeaders)
458     Dumper->printSectionHeaders();
459   if (opts::Relocations)
460     Dumper->printRelocations();
461   if (opts::DynRelocs)
462     Dumper->printDynamicRelocations();
463   if (opts::Symbols)
464     Dumper->printSymbols();
465   if (opts::DynamicSymbols)
466     Dumper->printDynamicSymbols();
467   if (opts::UnwindInfo)
468     Dumper->printUnwindInfo();
469   if (opts::DynamicTable)
470     Dumper->printDynamicTable();
471   if (opts::NeededLibraries)
472     Dumper->printNeededLibraries();
473   if (opts::ProgramHeaders)
474     Dumper->printProgramHeaders();
475   if (!opts::StringDump.empty())
476     llvm::for_each(opts::StringDump, [&Dumper, Obj](StringRef SectionName) {
477       Dumper->printSectionAsString(Obj, SectionName);
478     });
479   if (!opts::HexDump.empty())
480     llvm::for_each(opts::HexDump, [&Dumper, Obj](StringRef SectionName) {
481       Dumper->printSectionAsHex(Obj, SectionName);
482     });
483   if (opts::HashTable)
484     Dumper->printHashTable();
485   if (opts::GnuHashTable)
486     Dumper->printGnuHashTable();
487   if (opts::VersionInfo)
488     Dumper->printVersionInfo();
489   if (Obj->isELF()) {
490     if (opts::ELFLinkerOptions)
491       Dumper->printELFLinkerOptions();
492     if (Obj->getArch() == llvm::Triple::arm)
493       if (opts::ARMAttributes)
494         Dumper->printAttributes();
495     if (isMipsArch(Obj->getArch())) {
496       if (opts::MipsPLTGOT)
497         Dumper->printMipsPLTGOT();
498       if (opts::MipsABIFlags)
499         Dumper->printMipsABIFlags();
500       if (opts::MipsReginfo)
501         Dumper->printMipsReginfo();
502       if (opts::MipsOptions)
503         Dumper->printMipsOptions();
504     }
505     if (opts::SectionGroups)
506       Dumper->printGroupSections();
507     if (opts::HashHistogram)
508       Dumper->printHashHistogram();
509     if (opts::CGProfile)
510       Dumper->printCGProfile();
511     if (opts::Addrsig)
512       Dumper->printAddrsig();
513     if (opts::Notes)
514       Dumper->printNotes();
515   }
516   if (Obj->isCOFF()) {
517     if (opts::COFFImports)
518       Dumper->printCOFFImports();
519     if (opts::COFFExports)
520       Dumper->printCOFFExports();
521     if (opts::COFFDirectives)
522       Dumper->printCOFFDirectives();
523     if (opts::COFFBaseRelocs)
524       Dumper->printCOFFBaseReloc();
525     if (opts::COFFDebugDirectory)
526       Dumper->printCOFFDebugDirectory();
527     if (opts::COFFResources)
528       Dumper->printCOFFResources();
529     if (opts::COFFLoadConfig)
530       Dumper->printCOFFLoadConfig();
531     if (opts::Addrsig)
532       Dumper->printAddrsig();
533     if (opts::CodeView)
534       Dumper->printCodeViewDebugInfo();
535     if (opts::CodeViewMergedTypes)
536       Dumper->mergeCodeViewTypes(CVTypes.IDTable, CVTypes.TypeTable);
537   }
538   if (Obj->isMachO()) {
539     if (opts::MachODataInCode)
540       Dumper->printMachODataInCode();
541     if (opts::MachOIndirectSymbols)
542       Dumper->printMachOIndirectSymbols();
543     if (opts::MachOLinkerOptions)
544       Dumper->printMachOLinkerOptions();
545     if (opts::MachOSegment)
546       Dumper->printMachOSegment();
547     if (opts::MachOVersionMin)
548       Dumper->printMachOVersionMin();
549     if (opts::MachODysymtab)
550       Dumper->printMachODysymtab();
551   }
552   if (opts::PrintStackMap)
553     Dumper->printStackMap();
554 }
555 
556 /// Dumps each object file in \a Arc;
557 static void dumpArchive(const Archive *Arc, ScopedPrinter &Writer) {
558   Error Err = Error::success();
559   for (auto &Child : Arc->children(Err)) {
560     Expected<std::unique_ptr<Binary>> ChildOrErr = Child.getAsBinary();
561     if (!ChildOrErr) {
562       if (auto E = isNotObjectErrorInvalidFileType(ChildOrErr.takeError())) {
563         reportError(Arc->getFileName(), ChildOrErr.takeError());
564       }
565       continue;
566     }
567     if (ObjectFile *Obj = dyn_cast<ObjectFile>(&*ChildOrErr.get()))
568       dumpObject(Obj, Writer);
569     else if (COFFImportFile *Imp = dyn_cast<COFFImportFile>(&*ChildOrErr.get()))
570       dumpCOFFImportFile(Imp, Writer);
571     else
572       reportError(Arc->getFileName(), readobj_error::unrecognized_file_format);
573   }
574   if (Err)
575     reportError(Arc->getFileName(), std::move(Err));
576 }
577 
578 /// Dumps each object file in \a MachO Universal Binary;
579 static void dumpMachOUniversalBinary(const MachOUniversalBinary *UBinary,
580                                      ScopedPrinter &Writer) {
581   for (const MachOUniversalBinary::ObjectForArch &Obj : UBinary->objects()) {
582     Expected<std::unique_ptr<MachOObjectFile>> ObjOrErr = Obj.getAsObjectFile();
583     if (ObjOrErr)
584       dumpObject(&*ObjOrErr.get(), Writer);
585     else if (auto E = isNotObjectErrorInvalidFileType(ObjOrErr.takeError())) {
586       reportError(UBinary->getFileName(), ObjOrErr.takeError());
587     }
588     else if (Expected<std::unique_ptr<Archive>> AOrErr = Obj.getAsArchive())
589       dumpArchive(&*AOrErr.get(), Writer);
590   }
591 }
592 
593 /// Dumps \a WinRes, Windows Resource (.res) file;
594 static void dumpWindowsResourceFile(WindowsResource *WinRes) {
595   ScopedPrinter Printer{outs()};
596   WindowsRes::Dumper Dumper(WinRes, Printer);
597   if (auto Err = Dumper.printData())
598     reportError(WinRes->getFileName(), std::move(Err));
599 }
600 
601 
602 /// Opens \a File and dumps it.
603 static void dumpInput(StringRef File) {
604   ScopedPrinter Writer(outs());
605 
606   // Attempt to open the binary.
607   Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
608   if (!BinaryOrErr)
609     reportError(File, BinaryOrErr.takeError());
610   Binary &Binary = *BinaryOrErr.get().getBinary();
611 
612   if (Archive *Arc = dyn_cast<Archive>(&Binary))
613     dumpArchive(Arc, Writer);
614   else if (MachOUniversalBinary *UBinary =
615                dyn_cast<MachOUniversalBinary>(&Binary))
616     dumpMachOUniversalBinary(UBinary, Writer);
617   else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
618     dumpObject(Obj, Writer);
619   else if (COFFImportFile *Import = dyn_cast<COFFImportFile>(&Binary))
620     dumpCOFFImportFile(Import, Writer);
621   else if (WindowsResource *WinRes = dyn_cast<WindowsResource>(&Binary))
622     dumpWindowsResourceFile(WinRes);
623   else
624     reportError(File, readobj_error::unrecognized_file_format);
625 }
626 
627 /// Registers aliases that should only be allowed by readobj.
628 static void registerReadobjAliases() {
629   // -s has meant --sections for a very long time in llvm-readobj despite
630   // meaning --symbols in readelf.
631   static cl::alias SectionsShort("s", cl::desc("Alias for --section-headers"),
632                                  cl::aliasopt(opts::SectionHeaders),
633                                  cl::NotHidden);
634 
635   // Only register -t in llvm-readobj, as readelf reserves it for
636   // --section-details (not implemented yet).
637   static cl::alias SymbolsShort("t", cl::desc("Alias for --symbols"),
638                                 cl::aliasopt(opts::Symbols), cl::NotHidden);
639 }
640 
641 /// Registers aliases that should only be allowed by readelf.
642 static void registerReadelfAliases() {
643   // -s is here because for readobj it means --sections.
644   static cl::alias SymbolsShort("s", cl::desc("Alias for --symbols"),
645                                 cl::aliasopt(opts::Symbols), cl::NotHidden);
646 }
647 
648 int main(int argc, const char *argv[]) {
649   InitLLVM X(argc, argv);
650 
651   // Register the target printer for --version.
652   cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
653 
654   if (sys::path::stem(argv[0]).contains("readelf")) {
655     opts::Output = opts::GNU;
656     registerReadelfAliases();
657   } else {
658     registerReadobjAliases();
659   }
660 
661   cl::ParseCommandLineOptions(argc, argv, "LLVM Object Reader\n");
662 
663   if (opts::All) {
664     opts::FileHeaders = true;
665     opts::ProgramHeaders = true;
666     opts::SectionHeaders = true;
667     opts::Symbols = true;
668     opts::Relocations = true;
669     opts::DynamicTable = true;
670     opts::Notes = true;
671     opts::VersionInfo = true;
672     opts::UnwindInfo = true;
673     opts::SectionGroups = true;
674     opts::HashHistogram = true;
675   }
676 
677   if (opts::Headers) {
678     opts::FileHeaders = true;
679     opts::ProgramHeaders = true;
680     opts::SectionHeaders = true;
681   }
682 
683   // Default to stdin if no filename is specified.
684   if (opts::InputFilenames.empty())
685     opts::InputFilenames.push_back("-");
686 
687   llvm::for_each(opts::InputFilenames, dumpInput);
688 
689   if (opts::CodeViewMergedTypes) {
690     ScopedPrinter W(outs());
691     dumpCodeViewMergedTypes(W, CVTypes.IDTable, CVTypes.TypeTable);
692   }
693 
694   return 0;
695 }
696