xref: /llvm-project/llvm/tools/llvm-objcopy/llvm-objcopy.cpp (revision 35bee3e06bc02a7575283d4dca1841ca170b373d) 
1 //===- llvm-objcopy.cpp ---------------------------------------------------===//
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 #include "llvm-objcopy.h"
11 #include "Object.h"
12 #include "llvm/ADT/STLExtras.h"
13 #include "llvm/ADT/StringRef.h"
14 #include "llvm/ADT/Twine.h"
15 #include "llvm/BinaryFormat/ELF.h"
16 #include "llvm/Object/Binary.h"
17 #include "llvm/Object/ELFObjectFile.h"
18 #include "llvm/Object/ELFTypes.h"
19 #include "llvm/Object/Error.h"
20 #include "llvm/Option/Arg.h"
21 #include "llvm/Option/ArgList.h"
22 #include "llvm/Option/Option.h"
23 #include "llvm/Support/Casting.h"
24 #include "llvm/Support/CommandLine.h"
25 #include "llvm/Support/Compiler.h"
26 #include "llvm/Support/Error.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/ErrorOr.h"
29 #include "llvm/Support/FileOutputBuffer.h"
30 #include "llvm/Support/InitLLVM.h"
31 #include "llvm/Support/Path.h"
32 #include "llvm/Support/raw_ostream.h"
33 #include <algorithm>
34 #include <cassert>
35 #include <cstdlib>
36 #include <functional>
37 #include <iterator>
38 #include <memory>
39 #include <string>
40 #include <system_error>
41 #include <utility>
42 
43 using namespace llvm;
44 using namespace object;
45 using namespace ELF;
46 
47 namespace {
48 
49 enum ObjcopyID {
50   OBJCOPY_INVALID = 0, // This is not an option ID.
51 #define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
52                HELPTEXT, METAVAR, VALUES)                                      \
53   OBJCOPY_##ID,
54 #include "ObjcopyOpts.inc"
55 #undef OPTION
56 };
57 
58 #define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
59 #include "ObjcopyOpts.inc"
60 #undef PREFIX
61 
62 static const opt::OptTable::Info ObjcopyInfoTable[] = {
63 #define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
64                HELPTEXT, METAVAR, VALUES)                                      \
65   {PREFIX,          NAME,         HELPTEXT,                                    \
66    METAVAR,         OBJCOPY_##ID, opt::Option::KIND##Class,                    \
67    PARAM,           FLAGS,        OBJCOPY_##GROUP,                             \
68    OBJCOPY_##ALIAS, ALIASARGS,    VALUES},
69 #include "ObjcopyOpts.inc"
70 #undef OPTION
71 };
72 
73 class ObjcopyOptTable : public opt::OptTable {
74 public:
75   ObjcopyOptTable() : OptTable(ObjcopyInfoTable, true) {}
76 };
77 
78 enum StripID {
79   STRIP_INVALID = 0, // This is not an option ID.
80 #define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
81                HELPTEXT, METAVAR, VALUES)                                      \
82   STRIP_##ID,
83 #include "StripOpts.inc"
84 #undef OPTION
85 };
86 
87 static const opt::OptTable::Info StripInfoTable[] = {
88 #define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
89                HELPTEXT, METAVAR, VALUES)                                      \
90   {PREFIX,        NAME,       HELPTEXT,                                        \
91    METAVAR,       STRIP_##ID, opt::Option::KIND##Class,                        \
92    PARAM,         FLAGS,      STRIP_##GROUP,                                   \
93    STRIP_##ALIAS, ALIASARGS,  VALUES},
94 #include "StripOpts.inc"
95 #undef OPTION
96 };
97 
98 class StripOptTable : public opt::OptTable {
99 public:
100   StripOptTable() : OptTable(StripInfoTable, true) {}
101 };
102 
103 } // namespace
104 
105 // The name this program was invoked as.
106 static StringRef ToolName;
107 
108 namespace llvm {
109 
110 LLVM_ATTRIBUTE_NORETURN void error(Twine Message) {
111   errs() << ToolName << ": " << Message << ".\n";
112   errs().flush();
113   exit(1);
114 }
115 
116 LLVM_ATTRIBUTE_NORETURN void reportError(StringRef File, std::error_code EC) {
117   assert(EC);
118   errs() << ToolName << ": '" << File << "': " << EC.message() << ".\n";
119   exit(1);
120 }
121 
122 LLVM_ATTRIBUTE_NORETURN void reportError(StringRef File, Error E) {
123   assert(E);
124   std::string Buf;
125   raw_string_ostream OS(Buf);
126   logAllUnhandledErrors(std::move(E), OS, "");
127   OS.flush();
128   errs() << ToolName << ": '" << File << "': " << Buf;
129   exit(1);
130 }
131 
132 } // end namespace llvm
133 
134 struct CopyConfig {
135   StringRef OutputFilename;
136   StringRef InputFilename;
137   StringRef OutputFormat;
138   StringRef InputFormat;
139   StringRef BinaryArch;
140 
141   StringRef SplitDWO;
142   StringRef AddGnuDebugLink;
143   std::vector<StringRef> ToRemove;
144   std::vector<StringRef> Keep;
145   std::vector<StringRef> OnlyKeep;
146   std::vector<StringRef> AddSection;
147   std::vector<StringRef> SymbolsToLocalize;
148   std::vector<StringRef> SymbolsToGlobalize;
149   std::vector<StringRef> SymbolsToWeaken;
150   std::vector<StringRef> SymbolsToRemove;
151   std::vector<StringRef> SymbolsToKeep;
152   StringMap<StringRef> SymbolsToRename;
153   bool StripAll = false;
154   bool StripAllGNU = false;
155   bool StripDebug = false;
156   bool StripSections = false;
157   bool StripNonAlloc = false;
158   bool StripDWO = false;
159   bool ExtractDWO = false;
160   bool LocalizeHidden = false;
161   bool Weaken = false;
162   bool DiscardAll = false;
163   bool OnlyKeepDebug = false;
164 };
165 
166 using SectionPred = std::function<bool(const SectionBase &Sec)>;
167 
168 bool IsDWOSection(const SectionBase &Sec) { return Sec.Name.endswith(".dwo"); }
169 
170 bool OnlyKeepDWOPred(const Object &Obj, const SectionBase &Sec) {
171   // We can't remove the section header string table.
172   if (&Sec == Obj.SectionNames)
173     return false;
174   // Short of keeping the string table we want to keep everything that is a DWO
175   // section and remove everything else.
176   return !IsDWOSection(Sec);
177 }
178 
179 std::unique_ptr<Writer> CreateWriter(const CopyConfig &Config, Object &Obj,
180                                      StringRef File, ElfType OutputElfType) {
181   if (Config.OutputFormat == "binary") {
182     return llvm::make_unique<BinaryWriter>(File, Obj);
183   }
184   // Depending on the initial ELFT and OutputFormat we need a different Writer.
185   switch (OutputElfType) {
186   case ELFT_ELF32LE:
187     return llvm::make_unique<ELFWriter<ELF32LE>>(File, Obj,
188                                                  !Config.StripSections);
189   case ELFT_ELF64LE:
190     return llvm::make_unique<ELFWriter<ELF64LE>>(File, Obj,
191                                                  !Config.StripSections);
192   case ELFT_ELF32BE:
193     return llvm::make_unique<ELFWriter<ELF32BE>>(File, Obj,
194                                                  !Config.StripSections);
195   case ELFT_ELF64BE:
196     return llvm::make_unique<ELFWriter<ELF64BE>>(File, Obj,
197                                                  !Config.StripSections);
198   }
199   llvm_unreachable("Invalid output format");
200 }
201 
202 void SplitDWOToFile(const CopyConfig &Config, const Reader &Reader,
203                     StringRef File, ElfType OutputElfType) {
204   auto DWOFile = Reader.create();
205   DWOFile->removeSections(
206       [&](const SectionBase &Sec) { return OnlyKeepDWOPred(*DWOFile, Sec); });
207   auto Writer = CreateWriter(Config, *DWOFile, File, OutputElfType);
208   Writer->finalize();
209   Writer->write();
210 }
211 
212 // This function handles the high level operations of GNU objcopy including
213 // handling command line options. It's important to outline certain properties
214 // we expect to hold of the command line operations. Any operation that "keeps"
215 // should keep regardless of a remove. Additionally any removal should respect
216 // any previous removals. Lastly whether or not something is removed shouldn't
217 // depend a) on the order the options occur in or b) on some opaque priority
218 // system. The only priority is that keeps/copies overrule removes.
219 void HandleArgs(const CopyConfig &Config, Object &Obj, const Reader &Reader,
220                 ElfType OutputElfType) {
221 
222   if (!Config.SplitDWO.empty()) {
223     SplitDWOToFile(Config, Reader, Config.SplitDWO, OutputElfType);
224   }
225 
226   // TODO: update or remove symbols only if there is an option that affects them.
227   if (Obj.SymbolTable) {
228     Obj.SymbolTable->updateSymbols([&](Symbol &Sym) {
229       if ((Config.LocalizeHidden &&
230            (Sym.Visibility == STV_HIDDEN || Sym.Visibility == STV_INTERNAL)) ||
231           (!Config.SymbolsToLocalize.empty() &&
232            is_contained(Config.SymbolsToLocalize, Sym.Name)))
233         Sym.Binding = STB_LOCAL;
234 
235       if (!Config.SymbolsToGlobalize.empty() &&
236           is_contained(Config.SymbolsToGlobalize, Sym.Name))
237         Sym.Binding = STB_GLOBAL;
238 
239       if (!Config.SymbolsToWeaken.empty() &&
240           is_contained(Config.SymbolsToWeaken, Sym.Name) &&
241           Sym.Binding == STB_GLOBAL)
242         Sym.Binding = STB_WEAK;
243 
244       if (Config.Weaken && Sym.Binding == STB_GLOBAL &&
245           Sym.getShndx() != SHN_UNDEF)
246         Sym.Binding = STB_WEAK;
247 
248       const auto I = Config.SymbolsToRename.find(Sym.Name);
249       if (I != Config.SymbolsToRename.end())
250         Sym.Name = I->getValue();
251     });
252 
253     Obj.removeSymbols([&](const Symbol &Sym) {
254       if (!Config.SymbolsToKeep.empty() &&
255           is_contained(Config.SymbolsToKeep, Sym.Name))
256         return false;
257 
258       if (Config.DiscardAll && Sym.Binding == STB_LOCAL &&
259           Sym.getShndx() != SHN_UNDEF && Sym.Type != STT_FILE &&
260           Sym.Type != STT_SECTION)
261         return true;
262 
263       if (Config.StripAll || Config.StripAllGNU)
264         return true;
265 
266       if (!Config.SymbolsToRemove.empty() &&
267           is_contained(Config.SymbolsToRemove, Sym.Name)) {
268         return true;
269       }
270 
271       return false;
272     });
273   }
274 
275   SectionPred RemovePred = [](const SectionBase &) { return false; };
276 
277   // Removes:
278   if (!Config.ToRemove.empty()) {
279     RemovePred = [&Config](const SectionBase &Sec) {
280       return std::find(std::begin(Config.ToRemove), std::end(Config.ToRemove),
281                        Sec.Name) != std::end(Config.ToRemove);
282     };
283   }
284 
285   if (Config.StripDWO || !Config.SplitDWO.empty())
286     RemovePred = [RemovePred](const SectionBase &Sec) {
287       return IsDWOSection(Sec) || RemovePred(Sec);
288     };
289 
290   if (Config.ExtractDWO)
291     RemovePred = [RemovePred, &Obj](const SectionBase &Sec) {
292       return OnlyKeepDWOPred(Obj, Sec) || RemovePred(Sec);
293     };
294 
295   if (Config.StripAllGNU)
296     RemovePred = [RemovePred, &Obj](const SectionBase &Sec) {
297       if (RemovePred(Sec))
298         return true;
299       if ((Sec.Flags & SHF_ALLOC) != 0)
300         return false;
301       if (&Sec == Obj.SectionNames)
302         return false;
303       switch (Sec.Type) {
304       case SHT_SYMTAB:
305       case SHT_REL:
306       case SHT_RELA:
307       case SHT_STRTAB:
308         return true;
309       }
310       return Sec.Name.startswith(".debug");
311     };
312 
313   if (Config.StripSections) {
314     RemovePred = [RemovePred](const SectionBase &Sec) {
315       return RemovePred(Sec) || (Sec.Flags & SHF_ALLOC) == 0;
316     };
317   }
318 
319   if (Config.StripDebug) {
320     RemovePred = [RemovePred](const SectionBase &Sec) {
321       return RemovePred(Sec) || Sec.Name.startswith(".debug");
322     };
323   }
324 
325   if (Config.StripNonAlloc)
326     RemovePred = [RemovePred, &Obj](const SectionBase &Sec) {
327       if (RemovePred(Sec))
328         return true;
329       if (&Sec == Obj.SectionNames)
330         return false;
331       return (Sec.Flags & SHF_ALLOC) == 0;
332     };
333 
334   if (Config.StripAll)
335     RemovePred = [RemovePred, &Obj](const SectionBase &Sec) {
336       if (RemovePred(Sec))
337         return true;
338       if (&Sec == Obj.SectionNames)
339         return false;
340       if (Sec.Name.startswith(".gnu.warning"))
341         return false;
342       return (Sec.Flags & SHF_ALLOC) == 0;
343     };
344 
345   // Explicit copies:
346   if (!Config.OnlyKeep.empty()) {
347     RemovePred = [&Config, RemovePred, &Obj](const SectionBase &Sec) {
348       // Explicitly keep these sections regardless of previous removes.
349       if (std::find(std::begin(Config.OnlyKeep), std::end(Config.OnlyKeep),
350                     Sec.Name) != std::end(Config.OnlyKeep))
351         return false;
352 
353       // Allow all implicit removes.
354       if (RemovePred(Sec))
355         return true;
356 
357       // Keep special sections.
358       if (Obj.SectionNames == &Sec)
359         return false;
360       if (Obj.SymbolTable == &Sec || Obj.SymbolTable->getStrTab() == &Sec)
361         return false;
362 
363       // Remove everything else.
364       return true;
365     };
366   }
367 
368   if (!Config.Keep.empty()) {
369     RemovePred = [Config, RemovePred](const SectionBase &Sec) {
370       // Explicitly keep these sections regardless of previous removes.
371       if (std::find(std::begin(Config.Keep), std::end(Config.Keep), Sec.Name) !=
372           std::end(Config.Keep))
373         return false;
374       // Otherwise defer to RemovePred.
375       return RemovePred(Sec);
376     };
377   }
378 
379   // This has to be the last predicate assignment.
380   // If the option --keep-symbol has been specified
381   // and at least one of those symbols is present
382   // (equivalently, the updated symbol table is not empty)
383   // the symbol table and the string table should not be removed.
384   if (!Config.SymbolsToKeep.empty() && !Obj.SymbolTable->empty()) {
385     RemovePred = [&Obj, RemovePred](const SectionBase &Sec) {
386       if (&Sec == Obj.SymbolTable || &Sec == Obj.SymbolTable->getStrTab())
387         return false;
388       return RemovePred(Sec);
389     };
390   }
391 
392   Obj.removeSections(RemovePred);
393 
394   if (!Config.AddSection.empty()) {
395     for (const auto &Flag : Config.AddSection) {
396       auto SecPair = Flag.split("=");
397       auto SecName = SecPair.first;
398       auto File = SecPair.second;
399       auto BufOrErr = MemoryBuffer::getFile(File);
400       if (!BufOrErr)
401         reportError(File, BufOrErr.getError());
402       auto Buf = std::move(*BufOrErr);
403       auto BufPtr = reinterpret_cast<const uint8_t *>(Buf->getBufferStart());
404       auto BufSize = Buf->getBufferSize();
405       Obj.addSection<OwnedDataSection>(SecName,
406                                        ArrayRef<uint8_t>(BufPtr, BufSize));
407     }
408   }
409 
410   if (!Config.AddGnuDebugLink.empty())
411     Obj.addSection<GnuDebugLinkSection>(Config.AddGnuDebugLink);
412 }
413 
414 std::unique_ptr<Reader> CreateReader(StringRef InputFilename,
415                                      ElfType &OutputElfType) {
416   // Right now we can only read ELF files so there's only one reader;
417   auto Out = llvm::make_unique<ELFReader>(InputFilename);
418   // We need to set the default ElfType for output.
419   OutputElfType = Out->getElfType();
420   return std::move(Out);
421 }
422 
423 void ExecuteElfObjcopy(const CopyConfig &Config) {
424   ElfType OutputElfType;
425   auto Reader = CreateReader(Config.InputFilename, OutputElfType);
426   auto Obj = Reader->create();
427   auto Writer =
428       CreateWriter(Config, *Obj, Config.OutputFilename, OutputElfType);
429   HandleArgs(Config, *Obj, *Reader, OutputElfType);
430   Writer->finalize();
431   Writer->write();
432 }
433 
434 // ParseObjcopyOptions returns the config and sets the input arguments. If a
435 // help flag is set then ParseObjcopyOptions will print the help messege and
436 // exit.
437 CopyConfig ParseObjcopyOptions(ArrayRef<const char *> ArgsArr) {
438   ObjcopyOptTable T;
439   unsigned MissingArgumentIndex, MissingArgumentCount;
440   llvm::opt::InputArgList InputArgs =
441       T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
442 
443   if (InputArgs.size() == 0) {
444     T.PrintHelp(errs(), "llvm-objcopy <input> [ <output> ]", "objcopy tool");
445     exit(1);
446   }
447 
448   if (InputArgs.hasArg(OBJCOPY_help)) {
449     T.PrintHelp(outs(), "llvm-objcopy <input> [ <output> ]", "objcopy tool");
450     exit(0);
451   }
452 
453   SmallVector<const char *, 2> Positional;
454 
455   for (auto Arg : InputArgs.filtered(OBJCOPY_UNKNOWN))
456     error("unknown argument '" + Arg->getAsString(InputArgs) + "'");
457 
458   for (auto Arg : InputArgs.filtered(OBJCOPY_INPUT))
459     Positional.push_back(Arg->getValue());
460 
461   if (Positional.empty())
462     error("No input file specified");
463 
464   if (Positional.size() > 2)
465     error("Too many positional arguments");
466 
467   CopyConfig Config;
468   Config.InputFilename = Positional[0];
469   Config.OutputFilename = Positional[Positional.size() == 1 ? 0 : 1];
470   Config.InputFormat = InputArgs.getLastArgValue(OBJCOPY_input_target);
471   Config.OutputFormat = InputArgs.getLastArgValue(OBJCOPY_output_target);
472   Config.BinaryArch = InputArgs.getLastArgValue(OBJCOPY_binary_architecture);
473 
474   Config.SplitDWO = InputArgs.getLastArgValue(OBJCOPY_split_dwo);
475   Config.AddGnuDebugLink = InputArgs.getLastArgValue(OBJCOPY_add_gnu_debuglink);
476 
477   for (auto Arg : InputArgs.filtered(OBJCOPY_redefine_symbol)) {
478     if (!StringRef(Arg->getValue()).contains('='))
479       error("Bad format for --redefine-sym");
480     auto Old2New = StringRef(Arg->getValue()).split('=');
481     if (!Config.SymbolsToRename.insert(Old2New).second)
482       error("Multiple redefinition of symbol " + Old2New.first);
483   }
484 
485   for (auto Arg : InputArgs.filtered(OBJCOPY_remove_section))
486     Config.ToRemove.push_back(Arg->getValue());
487   for (auto Arg : InputArgs.filtered(OBJCOPY_keep))
488     Config.Keep.push_back(Arg->getValue());
489   for (auto Arg : InputArgs.filtered(OBJCOPY_only_keep))
490     Config.OnlyKeep.push_back(Arg->getValue());
491   for (auto Arg : InputArgs.filtered(OBJCOPY_add_section))
492     Config.AddSection.push_back(Arg->getValue());
493   Config.StripAll = InputArgs.hasArg(OBJCOPY_strip_all);
494   Config.StripAllGNU = InputArgs.hasArg(OBJCOPY_strip_all_gnu);
495   Config.StripDebug = InputArgs.hasArg(OBJCOPY_strip_debug);
496   Config.StripDWO = InputArgs.hasArg(OBJCOPY_strip_dwo);
497   Config.StripSections = InputArgs.hasArg(OBJCOPY_strip_sections);
498   Config.StripNonAlloc = InputArgs.hasArg(OBJCOPY_strip_non_alloc);
499   Config.ExtractDWO = InputArgs.hasArg(OBJCOPY_extract_dwo);
500   Config.LocalizeHidden = InputArgs.hasArg(OBJCOPY_localize_hidden);
501   Config.Weaken = InputArgs.hasArg(OBJCOPY_weaken);
502   Config.DiscardAll = InputArgs.hasArg(OBJCOPY_discard_all);
503   Config.OnlyKeepDebug = InputArgs.hasArg(OBJCOPY_only_keep_debug);
504   for (auto Arg : InputArgs.filtered(OBJCOPY_localize_symbol))
505     Config.SymbolsToLocalize.push_back(Arg->getValue());
506   for (auto Arg : InputArgs.filtered(OBJCOPY_globalize_symbol))
507     Config.SymbolsToGlobalize.push_back(Arg->getValue());
508   for (auto Arg : InputArgs.filtered(OBJCOPY_weaken_symbol))
509     Config.SymbolsToWeaken.push_back(Arg->getValue());
510   for (auto Arg : InputArgs.filtered(OBJCOPY_strip_symbol))
511     Config.SymbolsToRemove.push_back(Arg->getValue());
512   for (auto Arg : InputArgs.filtered(OBJCOPY_keep_symbol))
513     Config.SymbolsToKeep.push_back(Arg->getValue());
514 
515   return Config;
516 }
517 
518 // ParseStripOptions returns the config and sets the input arguments. If a
519 // help flag is set then ParseStripOptions will print the help messege and
520 // exit.
521 CopyConfig ParseStripOptions(ArrayRef<const char *> ArgsArr) {
522   StripOptTable T;
523   unsigned MissingArgumentIndex, MissingArgumentCount;
524   llvm::opt::InputArgList InputArgs =
525       T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
526 
527   if (InputArgs.size() == 0) {
528     T.PrintHelp(errs(), "llvm-strip <input> [ <output> ]", "strip tool");
529     exit(1);
530   }
531 
532   if (InputArgs.hasArg(STRIP_help)) {
533     T.PrintHelp(outs(), "llvm-strip <input> [ <output> ]", "strip tool");
534     exit(0);
535   }
536 
537   SmallVector<const char *, 2> Positional;
538   for (auto Arg : InputArgs.filtered(STRIP_UNKNOWN))
539     error("unknown argument '" + Arg->getAsString(InputArgs) + "'");
540   for (auto Arg : InputArgs.filtered(STRIP_INPUT))
541     Positional.push_back(Arg->getValue());
542 
543   if (Positional.empty())
544     error("No input file specified");
545 
546   if (Positional.size() > 2)
547     error("Support for multiple input files is not implemented yet");
548 
549   CopyConfig Config;
550   Config.InputFilename = Positional[0];
551   Config.OutputFilename = Positional[0];
552 
553   // Strip debug info only.
554   Config.StripDebug = InputArgs.hasArg(STRIP_strip_debug);
555   if (!Config.StripDebug)
556     Config.StripAll = true;
557 
558   for (auto Arg : InputArgs.filtered(STRIP_remove_section))
559     Config.ToRemove.push_back(Arg->getValue());
560 
561   for (auto Arg : InputArgs.filtered(STRIP_keep_symbol))
562     Config.SymbolsToKeep.push_back(Arg->getValue());
563 
564   return Config;
565 }
566 
567 int main(int argc, char **argv) {
568   InitLLVM X(argc, argv);
569   ToolName = argv[0];
570   CopyConfig Config;
571   if (sys::path::stem(ToolName).endswith_lower("strip"))
572     Config = ParseStripOptions(makeArrayRef(argv + 1, argc));
573   else
574     Config = ParseObjcopyOptions(makeArrayRef(argv + 1, argc));
575   ExecuteElfObjcopy(Config);
576 }
577