1 //===- llvm-objcopy.cpp ---------------------------------------------------===// 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 "ObjcopyOptions.h" 10 #include "llvm/ADT/STLExtras.h" 11 #include "llvm/ADT/SmallVector.h" 12 #include "llvm/ADT/StringRef.h" 13 #include "llvm/ADT/Twine.h" 14 #include "llvm/BinaryFormat/ELF.h" 15 #include "llvm/ObjCopy/COFF/COFFConfig.h" 16 #include "llvm/ObjCopy/COFF/COFFObjcopy.h" 17 #include "llvm/ObjCopy/CommonConfig.h" 18 #include "llvm/ObjCopy/ELF/ELFConfig.h" 19 #include "llvm/ObjCopy/ELF/ELFObjcopy.h" 20 #include "llvm/ObjCopy/MachO/MachOConfig.h" 21 #include "llvm/ObjCopy/MachO/MachOObjcopy.h" 22 #include "llvm/ObjCopy/ObjCopy.h" 23 #include "llvm/ObjCopy/wasm/WasmConfig.h" 24 #include "llvm/ObjCopy/wasm/WasmObjcopy.h" 25 #include "llvm/Object/Archive.h" 26 #include "llvm/Object/ArchiveWriter.h" 27 #include "llvm/Object/Binary.h" 28 #include "llvm/Object/COFF.h" 29 #include "llvm/Object/ELFObjectFile.h" 30 #include "llvm/Object/ELFTypes.h" 31 #include "llvm/Object/Error.h" 32 #include "llvm/Object/MachO.h" 33 #include "llvm/Object/MachOUniversal.h" 34 #include "llvm/Object/Wasm.h" 35 #include "llvm/Option/Arg.h" 36 #include "llvm/Option/ArgList.h" 37 #include "llvm/Option/Option.h" 38 #include "llvm/Support/Casting.h" 39 #include "llvm/Support/CommandLine.h" 40 #include "llvm/Support/Errc.h" 41 #include "llvm/Support/Error.h" 42 #include "llvm/Support/ErrorHandling.h" 43 #include "llvm/Support/ErrorOr.h" 44 #include "llvm/Support/FileUtilities.h" 45 #include "llvm/Support/LLVMDriver.h" 46 #include "llvm/Support/Memory.h" 47 #include "llvm/Support/Path.h" 48 #include "llvm/Support/Process.h" 49 #include "llvm/Support/SmallVectorMemoryBuffer.h" 50 #include "llvm/Support/StringSaver.h" 51 #include "llvm/Support/WithColor.h" 52 #include "llvm/Support/raw_ostream.h" 53 #include "llvm/TargetParser/Host.h" 54 #include <algorithm> 55 #include <cassert> 56 #include <cstdlib> 57 #include <memory> 58 #include <system_error> 59 #include <utility> 60 61 using namespace llvm; 62 using namespace llvm::objcopy; 63 using namespace llvm::object; 64 65 // The name this program was invoked as. 66 static StringRef ToolName; 67 68 static ErrorSuccess reportWarning(Error E) { 69 assert(E); 70 WithColor::warning(errs(), ToolName) << toString(std::move(E)) << '\n'; 71 return Error::success(); 72 } 73 74 static Expected<DriverConfig> getDriverConfig(ArrayRef<const char *> Args) { 75 StringRef Stem = sys::path::stem(ToolName); 76 auto Is = [=](StringRef Tool) { 77 // We need to recognize the following filenames: 78 // 79 // llvm-objcopy -> objcopy 80 // strip-10.exe -> strip 81 // powerpc64-unknown-freebsd13-objcopy -> objcopy 82 // llvm-install-name-tool -> install-name-tool 83 auto I = Stem.rfind_insensitive(Tool); 84 return I != StringRef::npos && 85 (I + Tool.size() == Stem.size() || !isAlnum(Stem[I + Tool.size()])); 86 }; 87 88 if (Is("bitcode-strip") || Is("bitcode_strip")) 89 return parseBitcodeStripOptions(Args, reportWarning); 90 else if (Is("strip")) 91 return parseStripOptions(Args, reportWarning); 92 else if (Is("install-name-tool") || Is("install_name_tool")) 93 return parseInstallNameToolOptions(Args); 94 else 95 return parseObjcopyOptions(Args, reportWarning); 96 } 97 98 /// The function executeObjcopyOnIHex does the dispatch based on the format 99 /// of the output specified by the command line options. 100 static Error executeObjcopyOnIHex(ConfigManager &ConfigMgr, MemoryBuffer &In, 101 raw_ostream &Out) { 102 // TODO: support output formats other than ELF. 103 Expected<const ELFConfig &> ELFConfig = ConfigMgr.getELFConfig(); 104 if (!ELFConfig) 105 return ELFConfig.takeError(); 106 107 return elf::executeObjcopyOnIHex(ConfigMgr.getCommonConfig(), *ELFConfig, In, 108 Out); 109 } 110 111 /// The function executeObjcopyOnRawBinary does the dispatch based on the format 112 /// of the output specified by the command line options. 113 static Error executeObjcopyOnRawBinary(ConfigManager &ConfigMgr, 114 MemoryBuffer &In, raw_ostream &Out) { 115 const CommonConfig &Config = ConfigMgr.getCommonConfig(); 116 switch (Config.OutputFormat) { 117 case FileFormat::ELF: 118 // FIXME: Currently, we call elf::executeObjcopyOnRawBinary even if the 119 // output format is binary/ihex or it's not given. This behavior differs from 120 // GNU objcopy. See https://bugs.llvm.org/show_bug.cgi?id=42171 for details. 121 case FileFormat::Binary: 122 case FileFormat::IHex: 123 case FileFormat::Unspecified: 124 Expected<const ELFConfig &> ELFConfig = ConfigMgr.getELFConfig(); 125 if (!ELFConfig) 126 return ELFConfig.takeError(); 127 128 return elf::executeObjcopyOnRawBinary(Config, *ELFConfig, In, Out); 129 } 130 131 llvm_unreachable("unsupported output format"); 132 } 133 134 /// The function executeObjcopy does the higher level dispatch based on the type 135 /// of input (raw binary, archive or single object file) and takes care of the 136 /// format-agnostic modifications, i.e. preserving dates. 137 static Error executeObjcopy(ConfigManager &ConfigMgr) { 138 CommonConfig &Config = ConfigMgr.Common; 139 140 Expected<FilePermissionsApplier> PermsApplierOrErr = 141 FilePermissionsApplier::create(Config.InputFilename); 142 if (!PermsApplierOrErr) 143 return PermsApplierOrErr.takeError(); 144 145 std::function<Error(raw_ostream & OutFile)> ObjcopyFunc; 146 147 OwningBinary<llvm::object::Binary> BinaryHolder; 148 std::unique_ptr<MemoryBuffer> MemoryBufferHolder; 149 150 if (Config.InputFormat == FileFormat::Binary || 151 Config.InputFormat == FileFormat::IHex) { 152 ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr = 153 MemoryBuffer::getFileOrSTDIN(Config.InputFilename); 154 if (!BufOrErr) 155 return createFileError(Config.InputFilename, BufOrErr.getError()); 156 MemoryBufferHolder = std::move(*BufOrErr); 157 158 if (Config.InputFormat == FileFormat::Binary) 159 ObjcopyFunc = [&](raw_ostream &OutFile) -> Error { 160 // Handle FileFormat::Binary. 161 return executeObjcopyOnRawBinary(ConfigMgr, *MemoryBufferHolder, 162 OutFile); 163 }; 164 else 165 ObjcopyFunc = [&](raw_ostream &OutFile) -> Error { 166 // Handle FileFormat::IHex. 167 return executeObjcopyOnIHex(ConfigMgr, *MemoryBufferHolder, OutFile); 168 }; 169 } else { 170 Expected<OwningBinary<llvm::object::Binary>> BinaryOrErr = 171 createBinary(Config.InputFilename); 172 if (!BinaryOrErr) 173 return createFileError(Config.InputFilename, BinaryOrErr.takeError()); 174 BinaryHolder = std::move(*BinaryOrErr); 175 176 if (Archive *Ar = dyn_cast<Archive>(BinaryHolder.getBinary())) { 177 // Handle Archive. 178 if (Error E = executeObjcopyOnArchive(ConfigMgr, *Ar)) 179 return E; 180 } else { 181 // Handle llvm::object::Binary. 182 ObjcopyFunc = [&](raw_ostream &OutFile) -> Error { 183 return executeObjcopyOnBinary(ConfigMgr, *BinaryHolder.getBinary(), 184 OutFile); 185 }; 186 } 187 } 188 189 if (ObjcopyFunc) { 190 if (Config.SplitDWO.empty()) { 191 // Apply transformations described by Config and store result into 192 // Config.OutputFilename using specified ObjcopyFunc function. 193 if (Error E = writeToOutput(Config.OutputFilename, ObjcopyFunc)) 194 return E; 195 } else { 196 Config.ExtractDWO = true; 197 Config.StripDWO = false; 198 // Copy .dwo tables from the Config.InputFilename into Config.SplitDWO 199 // file using specified ObjcopyFunc function. 200 if (Error E = writeToOutput(Config.SplitDWO, ObjcopyFunc)) 201 return E; 202 Config.ExtractDWO = false; 203 Config.StripDWO = true; 204 // Apply transformations described by Config, remove .dwo tables and 205 // store result into Config.OutputFilename using specified ObjcopyFunc 206 // function. 207 if (Error E = writeToOutput(Config.OutputFilename, ObjcopyFunc)) 208 return E; 209 } 210 } 211 212 if (Error E = 213 PermsApplierOrErr->apply(Config.OutputFilename, Config.PreserveDates)) 214 return E; 215 216 if (!Config.SplitDWO.empty()) 217 if (Error E = 218 PermsApplierOrErr->apply(Config.SplitDWO, Config.PreserveDates, 219 static_cast<sys::fs::perms>(0666))) 220 return E; 221 222 return Error::success(); 223 } 224 225 int llvm_objcopy_main(int argc, char **argv, const llvm::ToolContext &) { 226 ToolName = argv[0]; 227 228 // Expand response files. 229 // TODO: Move these lines, which are copied from lib/Support/CommandLine.cpp, 230 // into a separate function in the CommandLine library and call that function 231 // here. This is duplicated code. 232 SmallVector<const char *, 20> NewArgv(argv, argv + argc); 233 BumpPtrAllocator A; 234 StringSaver Saver(A); 235 cl::ExpandResponseFiles(Saver, 236 Triple(sys::getProcessTriple()).isOSWindows() 237 ? cl::TokenizeWindowsCommandLine 238 : cl::TokenizeGNUCommandLine, 239 NewArgv); 240 241 auto Args = ArrayRef(NewArgv).drop_front(); 242 Expected<DriverConfig> DriverConfig = getDriverConfig(Args); 243 244 if (!DriverConfig) { 245 logAllUnhandledErrors(DriverConfig.takeError(), 246 WithColor::error(errs(), ToolName)); 247 return 1; 248 } 249 for (ConfigManager &ConfigMgr : DriverConfig->CopyConfigs) { 250 if (Error E = executeObjcopy(ConfigMgr)) { 251 logAllUnhandledErrors(std::move(E), WithColor::error(errs(), ToolName)); 252 return 1; 253 } 254 } 255 256 return 0; 257 } 258