1 //===- llvm-readobj.cpp - Dump contents of an Object File -----------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This is a tool similar to readelf, except it works on multiple object file
10 // formats. The main purpose of this tool is to provide detailed output suitable
13 // Flags should be similar to readelf where supported, but the output format
14 // does not need to be identical. The point is to not make users learn yet
15 // another set of flags.
17 // Output should be specialized for each format where appropriate.
19 //===----------------------------------------------------------------------===//
21 #include "llvm-readobj.h"
23 #include "ObjDumper.h"
24 #include "WindowsResourceDumper.h"
25 #include "llvm/DebugInfo/CodeView/GlobalTypeTableBuilder.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 #include "llvm/Support/WithColor.h"
45 using namespace llvm::object;
48 cl::list<std::string> InputFilenames(cl::Positional,
49 cl::desc("<input object files>"),
55 cl::desc("Equivalent to setting: --file-headers, --program-headers, "
56 "--section-headers, --symbols, --relocations, "
57 "--dynamic-table, --notes, --version-info, --unwind, "
58 "--section-groups and --elf-hash-histogram."));
59 cl::alias AllShort("a", cl::desc("Alias for --all"), cl::aliasopt(All));
64 cl::desc("Equivalent to setting: --file-headers, --program-headers, "
65 "--section-headers"));
66 cl::alias HeadersShort("e", cl::desc("Alias for --headers"),
67 cl::aliasopt(Headers));
71 WideOutput("wide", cl::desc("Ignored for compatibility with GNU readelf"),
73 cl::alias WideOutputShort("W",
74 cl::desc("Alias for --wide"),
75 cl::aliasopt(WideOutput));
77 // --file-headers, --file-header, -h
78 cl::opt<bool> FileHeaders("file-headers",
79 cl::desc("Display file headers "));
80 cl::alias FileHeadersShort("h", cl::desc("Alias for --file-headers"),
81 cl::aliasopt(FileHeaders), cl::NotHidden);
82 cl::alias FileHeadersSingular("file-header",
83 cl::desc("Alias for --file-headers"),
84 cl::aliasopt(FileHeaders));
86 // --section-headers, --sections, -S
87 // Also -s in llvm-readobj mode.
88 cl::opt<bool> SectionHeaders("section-headers",
89 cl::desc("Display all section headers."));
90 cl::alias SectionsShortUpper("S", cl::desc("Alias for --section-headers"),
91 cl::aliasopt(SectionHeaders), cl::NotHidden);
92 cl::alias SectionHeadersAlias("sections",
93 cl::desc("Alias for --section-headers"),
94 cl::aliasopt(SectionHeaders), cl::NotHidden);
96 // --section-relocations
97 // Also --sr in llvm-readobj mode.
98 cl::opt<bool> SectionRelocations("section-relocations",
99 cl::desc("Display relocations for each section shown."));
102 // Also --st in llvm-readobj mode.
103 cl::opt<bool> SectionSymbols("section-symbols",
104 cl::desc("Display symbols for each section shown."));
107 // Also --sd in llvm-readobj mode.
108 cl::opt<bool> SectionData("section-data",
109 cl::desc("Display section data for each section shown."));
112 cl::opt<cl::boolOrDefault>
113 SectionMapping("section-mapping",
114 cl::desc("Display the section to segment mapping."));
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));
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));
129 cl::opt<bool> DynRelocs("dyn-relocations",
130 cl::desc("Display the dynamic relocation entries in the file"));
133 // Also -s in llvm-readelf mode, or -t in llvm-readobj mode.
136 cl::desc("Display the symbol table. Also display the dynamic "
137 "symbol table when using GNU output style for ELF"));
138 cl::alias SymbolsGNU("syms", cl::desc("Alias for --symbols"),
139 cl::aliasopt(Symbols));
141 // --dyn-symbols, --dyn-syms
142 // Also --dt in llvm-readobj mode.
143 cl::opt<bool> DynamicSymbols("dyn-symbols",
144 cl::desc("Display the dynamic symbol table"));
145 cl::alias DynSymsGNU("dyn-syms", cl::desc("Alias for --dyn-symbols"),
146 cl::aliasopt(DynamicSymbols));
149 cl::opt<bool> HashSymbols(
151 cl::desc("Display the dynamic symbols derived from the hash section"));
154 cl::opt<bool> UnwindInfo("unwind",
155 cl::desc("Display unwind information"));
156 cl::alias UnwindInfoShort("u",
157 cl::desc("Alias for --unwind"),
158 cl::aliasopt(UnwindInfo));
160 // --dynamic-table, --dynamic, -d
161 cl::opt<bool> DynamicTable("dynamic-table",
162 cl::desc("Display the ELF .dynamic section table"));
163 cl::alias DynamicTableShort("d", cl::desc("Alias for --dynamic-table"),
164 cl::aliasopt(DynamicTable), cl::NotHidden);
165 cl::alias DynamicTableAlias("dynamic", cl::desc("Alias for --dynamic-table"),
166 cl::aliasopt(DynamicTable));
169 cl::opt<bool> NeededLibraries("needed-libs",
170 cl::desc("Display the needed libraries"));
172 // --program-headers, --segments, -l
173 cl::opt<bool> ProgramHeaders("program-headers",
174 cl::desc("Display ELF program headers"));
175 cl::alias ProgramHeadersShort("l", cl::desc("Alias for --program-headers"),
176 cl::aliasopt(ProgramHeaders), cl::NotHidden);
177 cl::alias SegmentsAlias("segments", cl::desc("Alias for --program-headers"),
178 cl::aliasopt(ProgramHeaders));
181 cl::list<std::string> StringDump("string-dump", cl::desc("<number|name>"),
183 cl::alias StringDumpShort("p", cl::desc("Alias for --string-dump"),
184 cl::aliasopt(StringDump), cl::Prefix);
187 cl::list<std::string> HexDump("hex-dump", cl::desc("<number|name>"),
189 cl::alias HexDumpShort("x", cl::desc("Alias for --hex-dump"),
190 cl::aliasopt(HexDump), cl::Prefix);
193 cl::opt<bool> Demangle("demangle",
194 cl::desc("Demangle symbol names in output"));
195 cl::alias DemangleShort("C", cl::desc("Alias for --demangle"),
196 cl::aliasopt(Demangle), cl::NotHidden);
199 cl::opt<bool> HashTable("hash-table",
200 cl::desc("Display ELF hash table"));
203 cl::opt<bool> GnuHashTable("gnu-hash-table",
204 cl::desc("Display ELF .gnu.hash section"));
207 cl::opt<bool> ExpandRelocs("expand-relocs",
208 cl::desc("Expand each shown relocation to multiple lines"));
211 cl::opt<bool> RawRelr("raw-relr",
212 cl::desc("Do not decode relocations in SHT_RELR section, display raw contents"));
215 cl::opt<bool> CodeView("codeview",
216 cl::desc("Display CodeView debug information"));
218 // --codeview-merged-types
220 CodeViewMergedTypes("codeview-merged-types",
221 cl::desc("Display the merged CodeView type stream"));
224 cl::opt<bool> CodeViewEnableGHash(
227 "Enable global hashing for CodeView type stream de-duplication"));
229 // --codeview-subsection-bytes
230 cl::opt<bool> CodeViewSubsectionBytes(
231 "codeview-subsection-bytes",
232 cl::desc("Dump raw contents of codeview debug sections and records"));
235 cl::opt<bool> ARMAttributes("arm-attributes",
236 cl::desc("Display the ARM attributes section"));
240 MipsPLTGOT("mips-plt-got",
241 cl::desc("Display the MIPS GOT and PLT GOT sections"));
244 cl::opt<bool> MipsABIFlags("mips-abi-flags",
245 cl::desc("Display the MIPS.abiflags section"));
248 cl::opt<bool> MipsReginfo("mips-reginfo",
249 cl::desc("Display the MIPS .reginfo section"));
252 cl::opt<bool> MipsOptions("mips-options",
253 cl::desc("Display the MIPS .MIPS.options section"));
257 COFFImports("coff-imports", cl::desc("Display the PE/COFF import table"));
261 COFFExports("coff-exports", cl::desc("Display the PE/COFF export table"));
265 COFFDirectives("coff-directives",
266 cl::desc("Display the PE/COFF .drectve section"));
270 COFFBaseRelocs("coff-basereloc",
271 cl::desc("Display the PE/COFF .reloc section"));
273 // --coff-debug-directory
275 COFFDebugDirectory("coff-debug-directory",
276 cl::desc("Display the PE/COFF debug directory"));
279 cl::opt<bool> COFFResources("coff-resources",
280 cl::desc("Display the PE/COFF .rsrc section"));
282 // --coff-load-config
284 COFFLoadConfig("coff-load-config",
285 cl::desc("Display the PE/COFF load config"));
287 // --elf-linker-options
289 ELFLinkerOptions("elf-linker-options",
290 cl::desc("Display the ELF .linker-options section"));
292 // --macho-data-in-code
294 MachODataInCode("macho-data-in-code",
295 cl::desc("Display MachO Data in Code command"));
297 // --macho-indirect-symbols
299 MachOIndirectSymbols("macho-indirect-symbols",
300 cl::desc("Display MachO indirect symbols"));
302 // --macho-linker-options
304 MachOLinkerOptions("macho-linker-options",
305 cl::desc("Display MachO linker options"));
309 MachOSegment("macho-segment",
310 cl::desc("Display MachO Segment command"));
312 // --macho-version-min
314 MachOVersionMin("macho-version-min",
315 cl::desc("Display MachO version min command"));
319 MachODysymtab("macho-dysymtab",
320 cl::desc("Display MachO Dysymtab command"));
324 PrintStackMap("stackmap",
325 cl::desc("Display contents of stackmap section"));
327 // --version-info, -V
329 VersionInfo("version-info",
330 cl::desc("Display ELF version sections (if present)"));
331 cl::alias VersionInfoShort("V", cl::desc("Alias for -version-info"),
332 cl::aliasopt(VersionInfo));
334 // --elf-section-groups, --section-groups, -g
335 cl::opt<bool> SectionGroups("elf-section-groups",
336 cl::desc("Display ELF section group contents"));
337 cl::alias SectionGroupsAlias("section-groups",
338 cl::desc("Alias for -elf-sections-groups"),
339 cl::aliasopt(SectionGroups));
340 cl::alias SectionGroupsShort("g", cl::desc("Alias for -elf-sections-groups"),
341 cl::aliasopt(SectionGroups));
343 // --elf-hash-histogram, --histogram, -I
344 cl::opt<bool> HashHistogram(
345 "elf-hash-histogram",
346 cl::desc("Display bucket list histogram for hash sections"));
347 cl::alias HashHistogramShort("I", cl::desc("Alias for -elf-hash-histogram"),
348 cl::aliasopt(HashHistogram));
349 cl::alias HistogramAlias("histogram",
350 cl::desc("Alias for --elf-hash-histogram"),
351 cl::aliasopt(HashHistogram));
354 cl::opt<bool> CGProfile("elf-cg-profile", cl::desc("Display callgraph profile section"));
357 cl::opt<bool> Addrsig("addrsig",
358 cl::desc("Display address-significance table"));
361 cl::opt<OutputStyleTy>
362 Output("elf-output-style", cl::desc("Specify ELF dump style"),
363 cl::values(clEnumVal(LLVM, "LLVM default style"),
364 clEnumVal(GNU, "GNU readelf style")),
368 HelpResponse("\nPass @FILE as argument to read options from FILE.\n");
373 LLVM_ATTRIBUTE_NORETURN void reportError(Twine Msg) {
375 WithColor::error(errs()) << Msg << "\n";
379 void reportWarning(Twine Msg) {
382 WithColor::warning(errs()) << Msg << "\n";
385 void warn(Error Err) {
386 handleAllErrors(std::move(Err), [&](const ErrorInfoBase &EI) {
387 reportWarning(EI.message());
391 void error(Error EC) {
394 handleAllErrors(std::move(EC),
395 [&](const ErrorInfoBase &EI) { reportError(EI.message()); });
398 void error(std::error_code EC) {
401 reportError(EC.message());
406 static void reportError(StringRef Input, Error Err) {
409 error(createFileError(Input, std::move(Err)));
412 static void reportError(StringRef Input, std::error_code EC) {
413 reportError(Input, errorCodeToError(EC));
416 static bool isMipsArch(unsigned Arch) {
418 case llvm::Triple::mips:
419 case llvm::Triple::mipsel:
420 case llvm::Triple::mips64:
421 case llvm::Triple::mips64el:
428 struct ReadObjTypeTableBuilder {
429 ReadObjTypeTableBuilder()
430 : Allocator(), IDTable(Allocator), TypeTable(Allocator),
431 GlobalIDTable(Allocator), GlobalTypeTable(Allocator) {}
433 llvm::BumpPtrAllocator Allocator;
434 llvm::codeview::MergingTypeTableBuilder IDTable;
435 llvm::codeview::MergingTypeTableBuilder TypeTable;
436 llvm::codeview::GlobalTypeTableBuilder GlobalIDTable;
437 llvm::codeview::GlobalTypeTableBuilder GlobalTypeTable;
438 std::vector<OwningBinary<Binary>> Binaries;
441 static ReadObjTypeTableBuilder CVTypes;
443 /// Creates an format-specific object file dumper.
444 static std::error_code createDumper(const ObjectFile *Obj,
445 ScopedPrinter &Writer,
446 std::unique_ptr<ObjDumper> &Result) {
448 return readobj_error::unsupported_file_format;
451 return createCOFFDumper(Obj, Writer, Result);
453 return createELFDumper(Obj, Writer, Result);
455 return createMachODumper(Obj, Writer, Result);
457 return createWasmDumper(Obj, Writer, Result);
459 return createXCOFFDumper(Obj, Writer, Result);
461 return readobj_error::unsupported_obj_file_format;
464 /// Dumps the specified object file.
465 static void dumpObject(const ObjectFile *Obj, ScopedPrinter &Writer) {
466 std::unique_ptr<ObjDumper> Dumper;
467 if (std::error_code EC = createDumper(Obj, Writer, Dumper))
468 reportError(Obj->getFileName(), EC);
470 if (opts::Output == opts::LLVM) {
471 Writer.startLine() << "\n";
472 Writer.printString("File", Obj->getFileName());
473 Writer.printString("Format", Obj->getFileFormatName());
474 Writer.printString("Arch", Triple::getArchTypeName(
475 (llvm::Triple::ArchType)Obj->getArch()));
476 Writer.printString("AddressSize",
477 formatv("{0}bit", 8 * Obj->getBytesInAddress()));
478 Dumper->printLoadName();
481 if (opts::FileHeaders)
482 Dumper->printFileHeaders();
483 if (opts::SectionHeaders)
484 Dumper->printSectionHeaders();
485 if (opts::Relocations)
486 Dumper->printRelocations();
488 Dumper->printDynamicRelocations();
489 if (opts::Symbols || opts::DynamicSymbols)
490 Dumper->printSymbols(opts::Symbols, opts::DynamicSymbols);
491 if (opts::HashSymbols)
492 Dumper->printHashSymbols();
493 if (opts::UnwindInfo)
494 Dumper->printUnwindInfo();
495 if (opts::DynamicTable)
496 Dumper->printDynamicTable();
497 if (opts::NeededLibraries)
498 Dumper->printNeededLibraries();
499 if (opts::ProgramHeaders || opts::SectionMapping == cl::BOU_TRUE)
500 Dumper->printProgramHeaders(opts::ProgramHeaders, opts::SectionMapping);
501 if (!opts::StringDump.empty())
502 Dumper->printSectionsAsString(Obj, opts::StringDump);
503 if (!opts::HexDump.empty())
504 Dumper->printSectionsAsHex(Obj, opts::HexDump);
506 Dumper->printHashTable();
507 if (opts::GnuHashTable)
508 Dumper->printGnuHashTable();
509 if (opts::VersionInfo)
510 Dumper->printVersionInfo();
512 if (opts::ELFLinkerOptions)
513 Dumper->printELFLinkerOptions();
514 if (Obj->getArch() == llvm::Triple::arm)
515 if (opts::ARMAttributes)
516 Dumper->printAttributes();
517 if (isMipsArch(Obj->getArch())) {
518 if (opts::MipsPLTGOT)
519 Dumper->printMipsPLTGOT();
520 if (opts::MipsABIFlags)
521 Dumper->printMipsABIFlags();
522 if (opts::MipsReginfo)
523 Dumper->printMipsReginfo();
524 if (opts::MipsOptions)
525 Dumper->printMipsOptions();
527 if (opts::SectionGroups)
528 Dumper->printGroupSections();
529 if (opts::HashHistogram)
530 Dumper->printHashHistogram();
532 Dumper->printCGProfile();
534 Dumper->printAddrsig();
536 Dumper->printNotes();
539 if (opts::COFFImports)
540 Dumper->printCOFFImports();
541 if (opts::COFFExports)
542 Dumper->printCOFFExports();
543 if (opts::COFFDirectives)
544 Dumper->printCOFFDirectives();
545 if (opts::COFFBaseRelocs)
546 Dumper->printCOFFBaseReloc();
547 if (opts::COFFDebugDirectory)
548 Dumper->printCOFFDebugDirectory();
549 if (opts::COFFResources)
550 Dumper->printCOFFResources();
551 if (opts::COFFLoadConfig)
552 Dumper->printCOFFLoadConfig();
554 Dumper->printAddrsig();
556 Dumper->printCodeViewDebugInfo();
557 if (opts::CodeViewMergedTypes)
558 Dumper->mergeCodeViewTypes(CVTypes.IDTable, CVTypes.TypeTable,
559 CVTypes.GlobalIDTable, CVTypes.GlobalTypeTable,
560 opts::CodeViewEnableGHash);
562 if (Obj->isMachO()) {
563 if (opts::MachODataInCode)
564 Dumper->printMachODataInCode();
565 if (opts::MachOIndirectSymbols)
566 Dumper->printMachOIndirectSymbols();
567 if (opts::MachOLinkerOptions)
568 Dumper->printMachOLinkerOptions();
569 if (opts::MachOSegment)
570 Dumper->printMachOSegment();
571 if (opts::MachOVersionMin)
572 Dumper->printMachOVersionMin();
573 if (opts::MachODysymtab)
574 Dumper->printMachODysymtab();
576 if (opts::PrintStackMap)
577 Dumper->printStackMap();
580 /// Dumps each object file in \a Arc;
581 static void dumpArchive(const Archive *Arc, ScopedPrinter &Writer) {
582 Error Err = Error::success();
583 for (auto &Child : Arc->children(Err)) {
584 Expected<std::unique_ptr<Binary>> ChildOrErr = Child.getAsBinary();
586 if (auto E = isNotObjectErrorInvalidFileType(ChildOrErr.takeError())) {
587 reportError(Arc->getFileName(), std::move(E));
591 if (ObjectFile *Obj = dyn_cast<ObjectFile>(&*ChildOrErr.get()))
592 dumpObject(Obj, Writer);
593 else if (COFFImportFile *Imp = dyn_cast<COFFImportFile>(&*ChildOrErr.get()))
594 dumpCOFFImportFile(Imp, Writer);
596 reportError(Arc->getFileName(), readobj_error::unrecognized_file_format);
599 reportError(Arc->getFileName(), std::move(Err));
602 /// Dumps each object file in \a MachO Universal Binary;
603 static void dumpMachOUniversalBinary(const MachOUniversalBinary *UBinary,
604 ScopedPrinter &Writer) {
605 for (const MachOUniversalBinary::ObjectForArch &Obj : UBinary->objects()) {
606 Expected<std::unique_ptr<MachOObjectFile>> ObjOrErr = Obj.getAsObjectFile();
608 dumpObject(&*ObjOrErr.get(), Writer);
609 else if (auto E = isNotObjectErrorInvalidFileType(ObjOrErr.takeError())) {
610 reportError(UBinary->getFileName(), ObjOrErr.takeError());
612 else if (Expected<std::unique_ptr<Archive>> AOrErr = Obj.getAsArchive())
613 dumpArchive(&*AOrErr.get(), Writer);
617 /// Dumps \a WinRes, Windows Resource (.res) file;
618 static void dumpWindowsResourceFile(WindowsResource *WinRes,
619 ScopedPrinter &Printer) {
620 WindowsRes::Dumper Dumper(WinRes, Printer);
621 if (auto Err = Dumper.printData())
622 reportError(WinRes->getFileName(), std::move(Err));
626 /// Opens \a File and dumps it.
627 static void dumpInput(StringRef File, ScopedPrinter &Writer) {
628 // Attempt to open the binary.
629 Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
631 reportError(File, BinaryOrErr.takeError());
632 Binary &Binary = *BinaryOrErr.get().getBinary();
634 if (Archive *Arc = dyn_cast<Archive>(&Binary))
635 dumpArchive(Arc, Writer);
636 else if (MachOUniversalBinary *UBinary =
637 dyn_cast<MachOUniversalBinary>(&Binary))
638 dumpMachOUniversalBinary(UBinary, Writer);
639 else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
640 dumpObject(Obj, Writer);
641 else if (COFFImportFile *Import = dyn_cast<COFFImportFile>(&Binary))
642 dumpCOFFImportFile(Import, Writer);
643 else if (WindowsResource *WinRes = dyn_cast<WindowsResource>(&Binary))
644 dumpWindowsResourceFile(WinRes, Writer);
646 reportError(File, readobj_error::unrecognized_file_format);
648 CVTypes.Binaries.push_back(std::move(*BinaryOrErr));
651 /// Registers aliases that should only be allowed by readobj.
652 static void registerReadobjAliases() {
653 // -s has meant --sections for a very long time in llvm-readobj despite
654 // meaning --symbols in readelf.
655 static cl::alias SectionsShort("s", cl::desc("Alias for --section-headers"),
656 cl::aliasopt(opts::SectionHeaders),
659 // Only register -t in llvm-readobj, as readelf reserves it for
660 // --section-details (not implemented yet).
661 static cl::alias SymbolsShort("t", cl::desc("Alias for --symbols"),
662 cl::aliasopt(opts::Symbols), cl::NotHidden);
664 // The following two-letter aliases are only provided for readobj, as readelf
665 // allows single-letter args to be grouped together.
666 static cl::alias SectionRelocationsShort(
667 "sr", cl::desc("Alias for --section-relocations"),
668 cl::aliasopt(opts::SectionRelocations));
669 static cl::alias SectionDataShort("sd", cl::desc("Alias for --section-data"),
670 cl::aliasopt(opts::SectionData));
671 static cl::alias SectionSymbolsShort("st",
672 cl::desc("Alias for --section-symbols"),
673 cl::aliasopt(opts::SectionSymbols));
674 static cl::alias DynamicSymbolsShort("dt",
675 cl::desc("Alias for --dyn-symbols"),
676 cl::aliasopt(opts::DynamicSymbols));
679 /// Registers aliases that should only be allowed by readelf.
680 static void registerReadelfAliases() {
681 // -s is here because for readobj it means --sections.
682 static cl::alias SymbolsShort("s", cl::desc("Alias for --symbols"),
683 cl::aliasopt(opts::Symbols), cl::NotHidden,
686 // Allow all single letter flags to be grouped together.
687 for (auto &OptEntry : cl::getRegisteredOptions()) {
688 StringRef ArgName = OptEntry.getKey();
689 cl::Option *Option = OptEntry.getValue();
690 if (ArgName.size() == 1)
691 apply(Option, cl::Grouping);
695 int main(int argc, const char *argv[]) {
696 InitLLVM X(argc, argv);
698 // Register the target printer for --version.
699 cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
701 if (sys::path::stem(argv[0]).contains("readelf")) {
702 opts::Output = opts::GNU;
703 registerReadelfAliases();
705 registerReadobjAliases();
708 cl::ParseCommandLineOptions(argc, argv, "LLVM Object Reader\n");
711 opts::FileHeaders = true;
712 opts::ProgramHeaders = true;
713 opts::SectionHeaders = true;
714 opts::Symbols = true;
715 opts::Relocations = true;
716 opts::DynamicTable = true;
718 opts::VersionInfo = true;
719 opts::UnwindInfo = true;
720 opts::SectionGroups = true;
721 opts::HashHistogram = true;
725 opts::FileHeaders = true;
726 opts::ProgramHeaders = true;
727 opts::SectionHeaders = true;
730 // Default to stdin if no filename is specified.
731 if (opts::InputFilenames.empty())
732 opts::InputFilenames.push_back("-");
734 ScopedPrinter Writer(fouts());
735 for (const std::string &I : opts::InputFilenames)
736 dumpInput(I, Writer);
738 if (opts::CodeViewMergedTypes) {
739 if (opts::CodeViewEnableGHash)
740 dumpCodeViewMergedTypes(Writer, CVTypes.GlobalIDTable.records(),
741 CVTypes.GlobalTypeTable.records());
743 dumpCodeViewMergedTypes(Writer, CVTypes.IDTable.records(),
744 CVTypes.TypeTable.records());