tools/llvm-objcopy/MachO/MachOObjcopy.cpp

   1 //===- MachOObjcopy.cpp -----------------------------------------*- C++ -*-===//
   2 //
   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
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "MachOObjcopy.h"
  10 #include "../CopyConfig.h"
  11 #include "MachOReader.h"
  12 #include "MachOWriter.h"
  13 #include "llvm/Support/Errc.h"
  14 #include "llvm/Support/Error.h"
  15
  16 namespace llvm {
  17 namespace objcopy {
  18 namespace macho {
  19
  20 using namespace object;
  21
  22 static Error handleArgs(const CopyConfig &Config, Object &Obj) {
  23   if (Config.AllowBrokenLinks || !Config.BuildIdLinkDir.empty() ||
  24       Config.BuildIdLinkInput || Config.BuildIdLinkOutput ||
  25       !Config.SplitDWO.empty() || !Config.SymbolsPrefix.empty() ||
  26       !Config.AllocSectionsPrefix.empty() || !Config.AddSection.empty() ||
  27       !Config.DumpSection.empty() || !Config.KeepSection.empty() ||
  28       !Config.OnlySection.empty() || !Config.SymbolsToGlobalize.empty() ||
  29       !Config.SymbolsToKeep.empty() || !Config.SymbolsToLocalize.empty() ||
  30       !Config.SymbolsToWeaken.empty() || !Config.SymbolsToKeepGlobal.empty() ||
  31       !Config.SectionsToRename.empty() || !Config.SymbolsToRename.empty() ||
  32       !Config.UnneededSymbolsToRemove.empty() ||
  33       !Config.SetSectionFlags.empty() || !Config.ToRemove.empty() ||
  34       Config.ExtractDWO || Config.KeepFileSymbols || Config.LocalizeHidden ||
  35       Config.PreserveDates || Config.StripDWO || Config.StripNonAlloc ||
  36       Config.StripSections || Config.Weaken || Config.DecompressDebugSections ||
  37       Config.StripDebug || Config.StripNonAlloc || Config.StripSections ||
  38       Config.StripUnneeded || Config.DiscardMode != DiscardType::None ||
  39       !Config.SymbolsToAdd.empty() || Config.EntryExpr) {
  40     return createStringError(llvm::errc::invalid_argument,
  41                              "option not supported by llvm-objcopy for MachO");
  42   }
  43
  44   return Error::success();
  45 }
  46
  47 Error executeObjcopyOnBinary(const CopyConfig &Config,
  48                              object::MachOObjectFile &In, Buffer &Out) {
  49   MachOReader Reader(In);
  50   std::unique_ptr<Object> O = Reader.create();
  51   if (!O)
  52     return createFileError(
  53         Config.InputFilename,
  54         createStringError(object_error::parse_failed,
  55                           "unable to deserialize MachO object"));
  56
  57   if (Error E = handleArgs(Config, *O))
  58     return createFileError(Config.InputFilename, std::move(E));
  59
  60   MachOWriter Writer(*O, In.is64Bit(), In.isLittleEndian(), Out);
  61   if (auto E = Writer.finalize())
  62     return E;
  63   return Writer.write();
  64 }
  65
  66 } // end namespace macho
  67 } // end namespace objcopy
  68 } // end namespace llvm