1 files changed, 873 insertions, 0 deletions

diff --git a/contrib/llvm-project/llvm/tools/llvm-objcopy/CopyConfig.cpp b/contrib/llvm-project/llvm/tools/llvm-objcopy/CopyConfig.cpp
new file mode 100644
index 000000000000..8d6431b3044f
--- /dev/null
+++ b/contrib/llvm-project/llvm/tools/llvm-objcopy/CopyConfig.cpp
@@ -0,0 +1,873 @@
+//===- CopyConfig.cpp -----------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "CopyConfig.h"
+
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSet.h"
+#include "llvm/Option/Arg.h"
+#include "llvm/Option/ArgList.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compression.h"
+#include "llvm/Support/Errc.h"
+#include "llvm/Support/JamCRC.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/StringSaver.h"
+#include <memory>
+
+namespace llvm {
+namespace objcopy {
+
+namespace {
+enum ObjcopyID {
+  OBJCOPY_INVALID = 0, // This is not an option ID.
+#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
+               HELPTEXT, METAVAR, VALUES)                                      \
+  OBJCOPY_##ID,
+#include "ObjcopyOpts.inc"
+#undef OPTION
+};
+
+#define PREFIX(NAME, VALUE) const char *const OBJCOPY_##NAME[] = VALUE;
+#include "ObjcopyOpts.inc"
+#undef PREFIX
+
+static const opt::OptTable::Info ObjcopyInfoTable[] = {
+#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
+               HELPTEXT, METAVAR, VALUES)                                      \
+  {OBJCOPY_##PREFIX,                                                           \
+   NAME,                                                                       \
+   HELPTEXT,                                                                   \
+   METAVAR,                                                                    \
+   OBJCOPY_##ID,                                                               \
+   opt::Option::KIND##Class,                                                   \
+   PARAM,                                                                      \
+   FLAGS,                                                                      \
+   OBJCOPY_##GROUP,                                                            \
+   OBJCOPY_##ALIAS,                                                            \
+   ALIASARGS,                                                                  \
+   VALUES},
+#include "ObjcopyOpts.inc"
+#undef OPTION
+};
+
+class ObjcopyOptTable : public opt::OptTable {
+public:
+  ObjcopyOptTable() : OptTable(ObjcopyInfoTable) {}
+};
+
+enum StripID {
+  STRIP_INVALID = 0, // This is not an option ID.
+#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
+               HELPTEXT, METAVAR, VALUES)                                      \
+  STRIP_##ID,
+#include "StripOpts.inc"
+#undef OPTION
+};
+
+#define PREFIX(NAME, VALUE) const char *const STRIP_##NAME[] = VALUE;
+#include "StripOpts.inc"
+#undef PREFIX
+
+static const opt::OptTable::Info StripInfoTable[] = {
+#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM,  \
+               HELPTEXT, METAVAR, VALUES)                                      \
+  {STRIP_##PREFIX, NAME,       HELPTEXT,                                       \
+   METAVAR,        STRIP_##ID, opt::Option::KIND##Class,                       \
+   PARAM,          FLAGS,      STRIP_##GROUP,                                  \
+   STRIP_##ALIAS,  ALIASARGS,  VALUES},
+#include "StripOpts.inc"
+#undef OPTION
+};
+
+class StripOptTable : public opt::OptTable {
+public:
+  StripOptTable() : OptTable(StripInfoTable) {}
+};
+
+} // namespace
+
+static SectionFlag parseSectionRenameFlag(StringRef SectionName) {
+  return llvm::StringSwitch<SectionFlag>(SectionName)
+      .CaseLower("alloc", SectionFlag::SecAlloc)
+      .CaseLower("load", SectionFlag::SecLoad)
+      .CaseLower("noload", SectionFlag::SecNoload)
+      .CaseLower("readonly", SectionFlag::SecReadonly)
+      .CaseLower("debug", SectionFlag::SecDebug)
+      .CaseLower("code", SectionFlag::SecCode)
+      .CaseLower("data", SectionFlag::SecData)
+      .CaseLower("rom", SectionFlag::SecRom)
+      .CaseLower("merge", SectionFlag::SecMerge)
+      .CaseLower("strings", SectionFlag::SecStrings)
+      .CaseLower("contents", SectionFlag::SecContents)
+      .CaseLower("share", SectionFlag::SecShare)
+      .Default(SectionFlag::SecNone);
+}
+
+static Expected<SectionFlag>
+parseSectionFlagSet(ArrayRef<StringRef> SectionFlags) {
+  SectionFlag ParsedFlags = SectionFlag::SecNone;
+  for (StringRef Flag : SectionFlags) {
+    SectionFlag ParsedFlag = parseSectionRenameFlag(Flag);
+    if (ParsedFlag == SectionFlag::SecNone)
+      return createStringError(
+          errc::invalid_argument,
+          "unrecognized section flag '%s'. Flags supported for GNU "
+          "compatibility: alloc, load, noload, readonly, debug, code, data, "
+          "rom, share, contents, merge, strings",
+          Flag.str().c_str());
+    ParsedFlags |= ParsedFlag;
+  }
+
+  return ParsedFlags;
+}
+
+static Expected<SectionRename> parseRenameSectionValue(StringRef FlagValue) {
+  if (!FlagValue.contains('='))
+    return createStringError(errc::invalid_argument,
+                             "bad format for --rename-section: missing '='");
+
+  // Initial split: ".foo" = ".bar,f1,f2,..."
+  auto Old2New = FlagValue.split('=');
+  SectionRename SR;
+  SR.OriginalName = Old2New.first;
+
+  // Flags split: ".bar" "f1" "f2" ...
+  SmallVector<StringRef, 6> NameAndFlags;
+  Old2New.second.split(NameAndFlags, ',');
+  SR.NewName = NameAndFlags[0];
+
+  if (NameAndFlags.size() > 1) {
+    Expected<SectionFlag> ParsedFlagSet =
+        parseSectionFlagSet(makeArrayRef(NameAndFlags).drop_front());
+    if (!ParsedFlagSet)
+      return ParsedFlagSet.takeError();
+    SR.NewFlags = *ParsedFlagSet;
+  }
+
+  return SR;
+}
+
+static Expected<SectionFlagsUpdate>
+parseSetSectionFlagValue(StringRef FlagValue) {
+  if (!StringRef(FlagValue).contains('='))
+    return createStringError(errc::invalid_argument,
+                             "bad format for --set-section-flags: missing '='");
+
+  // Initial split: ".foo" = "f1,f2,..."
+  auto Section2Flags = StringRef(FlagValue).split('=');
+  SectionFlagsUpdate SFU;
+  SFU.Name = Section2Flags.first;
+
+  // Flags split: "f1" "f2" ...
+  SmallVector<StringRef, 6> SectionFlags;
+  Section2Flags.second.split(SectionFlags, ',');
+  Expected<SectionFlag> ParsedFlagSet = parseSectionFlagSet(SectionFlags);
+  if (!ParsedFlagSet)
+    return ParsedFlagSet.takeError();
+  SFU.NewFlags = *ParsedFlagSet;
+
+  return SFU;
+}
+
+static Expected<NewSymbolInfo> parseNewSymbolInfo(StringRef FlagValue) {
+  // Parse value given with --add-symbol option and create the
+  // new symbol if possible. The value format for --add-symbol is:
+  //
+  // <name>=[<section>:]<value>[,<flags>]
+  //
+  // where:
+  // <name> - symbol name, can be empty string
+  // <section> - optional section name. If not given ABS symbol is created
+  // <value> - symbol value, can be decimal or hexadecimal number prefixed
+  //           with 0x.
+  // <flags> - optional flags affecting symbol type, binding or visibility:
+  //           The following are currently supported:
+  //
+  //           global, local, weak, default, hidden, file, section, object,
+  //           indirect-function.
+  //
+  //           The following flags are ignored and provided for GNU
+  //           compatibility only:
+  //
+  //           warning, debug, constructor, indirect, synthetic,
+  //           unique-object, before=<symbol>.
+  NewSymbolInfo SI;
+  StringRef Value;
+  std::tie(SI.SymbolName, Value) = FlagValue.split('=');
+  if (Value.empty())
+    return createStringError(
+        errc::invalid_argument,
+        "bad format for --add-symbol, missing '=' after '%s'",
+        SI.SymbolName.str().c_str());
+
+  if (Value.contains(':')) {
+    std::tie(SI.SectionName, Value) = Value.split(':');
+    if (SI.SectionName.empty() || Value.empty())
+      return createStringError(
+          errc::invalid_argument,
+          "bad format for --add-symbol, missing section name or symbol value");
+  }
+
+  SmallVector<StringRef, 6> Flags;
+  Value.split(Flags, ',');
+  if (Flags[0].getAsInteger(0, SI.Value))
+    return createStringError(errc::invalid_argument, "bad symbol value: '%s'",
+                             Flags[0].str().c_str());
+
+  using Functor = std::function<void(void)>;
+  SmallVector<StringRef, 6> UnsupportedFlags;
+  for (size_t I = 1, NumFlags = Flags.size(); I < NumFlags; ++I)
+    static_cast<Functor>(
+        StringSwitch<Functor>(Flags[I])
+            .CaseLower("global", [&SI] { SI.Bind = ELF::STB_GLOBAL; })
+            .CaseLower("local", [&SI] { SI.Bind = ELF::STB_LOCAL; })
+            .CaseLower("weak", [&SI] { SI.Bind = ELF::STB_WEAK; })
+            .CaseLower("default", [&SI] { SI.Visibility = ELF::STV_DEFAULT; })
+            .CaseLower("hidden", [&SI] { SI.Visibility = ELF::STV_HIDDEN; })
+            .CaseLower("file", [&SI] { SI.Type = ELF::STT_FILE; })
+            .CaseLower("section", [&SI] { SI.Type = ELF::STT_SECTION; })
+            .CaseLower("object", [&SI] { SI.Type = ELF::STT_OBJECT; })
+            .CaseLower("function", [&SI] { SI.Type = ELF::STT_FUNC; })
+            .CaseLower("indirect-function",
+                       [&SI] { SI.Type = ELF::STT_GNU_IFUNC; })
+            .CaseLower("debug", [] {})
+            .CaseLower("constructor", [] {})
+            .CaseLower("warning", [] {})
+            .CaseLower("indirect", [] {})
+            .CaseLower("synthetic", [] {})
+            .CaseLower("unique-object", [] {})
+            .StartsWithLower("before", [] {})
+            .Default([&] { UnsupportedFlags.push_back(Flags[I]); }))();
+  if (!UnsupportedFlags.empty())
+    return createStringError(errc::invalid_argument,
+                             "unsupported flag%s for --add-symbol: '%s'",
+                             UnsupportedFlags.size() > 1 ? "s" : "",
+                             join(UnsupportedFlags, "', '").c_str());
+  return SI;
+}
+
+static const StringMap<MachineInfo> ArchMap{
+    // Name, {EMachine, 64bit, LittleEndian}
+    {"aarch64", {ELF::EM_AARCH64, true, true}},
+    {"arm", {ELF::EM_ARM, false, true}},
+    {"i386", {ELF::EM_386, false, true}},
+    {"i386:x86-64", {ELF::EM_X86_64, true, true}},
+    {"mips", {ELF::EM_MIPS, false, false}},
+    {"powerpc:common64", {ELF::EM_PPC64, true, true}},
+    {"riscv:rv32", {ELF::EM_RISCV, false, true}},
+    {"riscv:rv64", {ELF::EM_RISCV, true, true}},
+    {"sparc", {ELF::EM_SPARC, false, false}},
+    {"sparcel", {ELF::EM_SPARC, false, true}},
+    {"x86-64", {ELF::EM_X86_64, true, true}},
+};
+
+static Expected<const MachineInfo &> getMachineInfo(StringRef Arch) {
+  auto Iter = ArchMap.find(Arch);
+  if (Iter == std::end(ArchMap))
+    return createStringError(errc::invalid_argument,
+                             "invalid architecture: '%s'", Arch.str().c_str());
+  return Iter->getValue();
+}
+
+struct TargetInfo {
+  FileFormat Format;
+  MachineInfo Machine;
+};
+
+// FIXME: consolidate with the bfd parsing used by lld.
+static const StringMap<MachineInfo> TargetMap{
+    // Name, {EMachine, 64bit, LittleEndian}
+    // x86
+    {"elf32-i386", {ELF::EM_386, false, true}},
+    {"elf32-x86-64", {ELF::EM_X86_64, false, true}},
+    {"elf64-x86-64", {ELF::EM_X86_64, true, true}},
+    // Intel MCU
+    {"elf32-iamcu", {ELF::EM_IAMCU, false, true}},
+    // ARM
+    {"elf32-littlearm", {ELF::EM_ARM, false, true}},
+    // ARM AArch64
+    {"elf64-aarch64", {ELF::EM_AARCH64, true, true}},
+    {"elf64-littleaarch64", {ELF::EM_AARCH64, true, true}},
+    // RISC-V
+    {"elf32-littleriscv", {ELF::EM_RISCV, false, true}},
+    {"elf64-littleriscv", {ELF::EM_RISCV, true, true}},
+    // PowerPC
+    {"elf32-powerpc", {ELF::EM_PPC, false, false}},
+    {"elf32-powerpcle", {ELF::EM_PPC, false, true}},
+    {"elf64-powerpc", {ELF::EM_PPC64, true, false}},
+    {"elf64-powerpcle", {ELF::EM_PPC64, true, true}},
+    // MIPS
+    {"elf32-bigmips", {ELF::EM_MIPS, false, false}},
+    {"elf32-ntradbigmips", {ELF::EM_MIPS, false, false}},
+    {"elf32-ntradlittlemips", {ELF::EM_MIPS, false, true}},
+    {"elf32-tradbigmips", {ELF::EM_MIPS, false, false}},
+    {"elf32-tradlittlemips", {ELF::EM_MIPS, false, true}},
+    {"elf64-tradbigmips", {ELF::EM_MIPS, true, false}},
+    {"elf64-tradlittlemips", {ELF::EM_MIPS, true, true}},
+    // SPARC
+    {"elf32-sparc", {ELF::EM_SPARC, false, false}},
+    {"elf32-sparcel", {ELF::EM_SPARC, false, true}},
+};
+
+static Expected<TargetInfo>
+getOutputTargetInfoByTargetName(StringRef TargetName) {
+  StringRef OriginalTargetName = TargetName;
+  bool IsFreeBSD = TargetName.consume_back("-freebsd");
+  auto Iter = TargetMap.find(TargetName);
+  if (Iter == std::end(TargetMap))
+    return createStringError(errc::invalid_argument,
+                             "invalid output format: '%s'",
+                             OriginalTargetName.str().c_str());
+  MachineInfo MI = Iter->getValue();
+  if (IsFreeBSD)
+    MI.OSABI = ELF::ELFOSABI_FREEBSD;
+
+  FileFormat Format;
+  if (TargetName.startswith("elf"))
+    Format = FileFormat::ELF;
+  else
+    // This should never happen because `TargetName` is valid (it certainly
+    // exists in the TargetMap).
+    llvm_unreachable("unknown target prefix");
+
+  return {TargetInfo{Format, MI}};
+}
+
+static Error addSymbolsFromFile(std::vector<NameOrRegex> &Symbols,
+                                BumpPtrAllocator &Alloc, StringRef Filename,
+                                bool UseRegex) {
+  StringSaver Saver(Alloc);
+  SmallVector<StringRef, 16> Lines;
+  auto BufOrErr = MemoryBuffer::getFile(Filename);
+  if (!BufOrErr)
+    return createFileError(Filename, BufOrErr.getError());
+
+  BufOrErr.get()->getBuffer().split(Lines, '\n');
+  for (StringRef Line : Lines) {
+    // Ignore everything after '#', trim whitespace, and only add the symbol if
+    // it's not empty.
+    auto TrimmedLine = Line.split('#').first.trim();
+    if (!TrimmedLine.empty())
+      Symbols.emplace_back(Saver.save(TrimmedLine), UseRegex);
+  }
+
+  return Error::success();
+}
+
+NameOrRegex::NameOrRegex(StringRef Pattern, bool IsRegex) {
+  if (!IsRegex) {
+    Name = Pattern;
+    return;
+  }
+
+  SmallVector<char, 32> Data;
+  R = std::make_shared<Regex>(
+      ("^" + Pattern.ltrim('^').rtrim('$') + "$").toStringRef(Data));
+}
+
+static Error addSymbolsToRenameFromFile(StringMap<StringRef> &SymbolsToRename,
+                                        BumpPtrAllocator &Alloc,
+                                        StringRef Filename) {
+  StringSaver Saver(Alloc);
+  SmallVector<StringRef, 16> Lines;
+  auto BufOrErr = MemoryBuffer::getFile(Filename);
+  if (!BufOrErr)
+    return createFileError(Filename, BufOrErr.getError());
+
+  BufOrErr.get()->getBuffer().split(Lines, '\n');
+  size_t NumLines = Lines.size();
+  for (size_t LineNo = 0; LineNo < NumLines; ++LineNo) {
+    StringRef TrimmedLine = Lines[LineNo].split('#').first.trim();
+    if (TrimmedLine.empty())
+      continue;
+
+    std::pair<StringRef, StringRef> Pair = Saver.save(TrimmedLine).split(' ');
+    StringRef NewName = Pair.second.trim();
+    if (NewName.empty())
+      return createStringError(errc::invalid_argument,
+                               "%s:%zu: missing new symbol name",
+                               Filename.str().c_str(), LineNo + 1);
+    SymbolsToRename.insert({Pair.first, NewName});
+  }
+  return Error::success();
+}
+
+template <class T> static ErrorOr<T> getAsInteger(StringRef Val) {
+  T Result;
+  if (Val.getAsInteger(0, Result))
+    return errc::invalid_argument;
+  return Result;
+}
+
+// ParseObjcopyOptions returns the config and sets the input arguments. If a
+// help flag is set then ParseObjcopyOptions will print the help messege and
+// exit.
+Expected<DriverConfig> parseObjcopyOptions(ArrayRef<const char *> ArgsArr) {
+  DriverConfig DC;
+  ObjcopyOptTable T;
+  unsigned MissingArgumentIndex, MissingArgumentCount;
+  llvm::opt::InputArgList InputArgs =
+      T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
+
+  if (InputArgs.size() == 0) {
+    T.PrintHelp(errs(), "llvm-objcopy input [output]", "objcopy tool");
+    exit(1);
+  }
+
+  if (InputArgs.hasArg(OBJCOPY_help)) {
+    T.PrintHelp(outs(), "llvm-objcopy input [output]", "objcopy tool");
+    exit(0);
+  }
+
+  if (InputArgs.hasArg(OBJCOPY_version)) {
+    outs() << "llvm-objcopy, compatible with GNU objcopy\n";
+    cl::PrintVersionMessage();
+    exit(0);
+  }
+
+  SmallVector<const char *, 2> Positional;
+
+  for (auto Arg : InputArgs.filtered(OBJCOPY_UNKNOWN))
+    return createStringError(errc::invalid_argument, "unknown argument '%s'",
+                             Arg->getAsString(InputArgs).c_str());
+
+  for (auto Arg : InputArgs.filtered(OBJCOPY_INPUT))
+    Positional.push_back(Arg->getValue());
+
+  if (Positional.empty())
+    return createStringError(errc::invalid_argument, "no input file specified");
+
+  if (Positional.size() > 2)
+    return createStringError(errc::invalid_argument,
+                             "too many positional arguments");
+
+  CopyConfig Config;
+  Config.InputFilename = Positional[0];
+  Config.OutputFilename = Positional[Positional.size() == 1 ? 0 : 1];
+  if (InputArgs.hasArg(OBJCOPY_target) &&
+      (InputArgs.hasArg(OBJCOPY_input_target) ||
+       InputArgs.hasArg(OBJCOPY_output_target)))
+    return createStringError(
+        errc::invalid_argument,
+        "--target cannot be used with --input-target or --output-target");
+
+  bool UseRegex = InputArgs.hasArg(OBJCOPY_regex);
+  StringRef InputFormat, OutputFormat;
+  if (InputArgs.hasArg(OBJCOPY_target)) {
+    InputFormat = InputArgs.getLastArgValue(OBJCOPY_target);
+    OutputFormat = InputArgs.getLastArgValue(OBJCOPY_target);
+  } else {
+    InputFormat = InputArgs.getLastArgValue(OBJCOPY_input_target);
+    OutputFormat = InputArgs.getLastArgValue(OBJCOPY_output_target);
+  }
+
+  // FIXME:  Currently, we ignore the target for non-binary/ihex formats
+  // explicitly specified by -I option (e.g. -Ielf32-x86-64) and guess the
+  // format by llvm::object::createBinary regardless of the option value.
+  Config.InputFormat = StringSwitch<FileFormat>(InputFormat)
+                           .Case("binary", FileFormat::Binary)
+                           .Case("ihex", FileFormat::IHex)
+                           .Default(FileFormat::Unspecified);
+  if (Config.InputFormat == FileFormat::Binary) {
+    auto BinaryArch = InputArgs.getLastArgValue(OBJCOPY_binary_architecture);
+    if (BinaryArch.empty())
+      return createStringError(
+          errc::invalid_argument,
+          "specified binary input without specifiying an architecture");
+    Expected<const MachineInfo &> MI = getMachineInfo(BinaryArch);
+    if (!MI)
+      return MI.takeError();
+    Config.BinaryArch = *MI;
+  }
+
+  Config.OutputFormat = StringSwitch<FileFormat>(OutputFormat)
+                            .Case("binary", FileFormat::Binary)
+                            .Case("ihex", FileFormat::IHex)
+                            .Default(FileFormat::Unspecified);
+  if (Config.OutputFormat == FileFormat::Unspecified && !OutputFormat.empty()) {
+    Expected<TargetInfo> Target = getOutputTargetInfoByTargetName(OutputFormat);
+    if (!Target)
+      return Target.takeError();
+    Config.OutputFormat = Target->Format;
+    Config.OutputArch = Target->Machine;
+  }
+
+  if (auto Arg = InputArgs.getLastArg(OBJCOPY_compress_debug_sections,
+                                      OBJCOPY_compress_debug_sections_eq)) {
+    Config.CompressionType = DebugCompressionType::Z;
+
+    if (Arg->getOption().getID() == OBJCOPY_compress_debug_sections_eq) {
+      Config.CompressionType =
+          StringSwitch<DebugCompressionType>(
+              InputArgs.getLastArgValue(OBJCOPY_compress_debug_sections_eq))
+              .Case("zlib-gnu", DebugCompressionType::GNU)
+              .Case("zlib", DebugCompressionType::Z)
+              .Default(DebugCompressionType::None);
+      if (Config.CompressionType == DebugCompressionType::None)
+        return createStringError(
+            errc::invalid_argument,
+            "invalid or unsupported --compress-debug-sections format: %s",
+            InputArgs.getLastArgValue(OBJCOPY_compress_debug_sections_eq)
+                .str()
+                .c_str());
+    }
+    if (!zlib::isAvailable())
+      return createStringError(
+          errc::invalid_argument,
+          "LLVM was not compiled with LLVM_ENABLE_ZLIB: can not compress");
+  }
+
+  Config.AddGnuDebugLink = InputArgs.getLastArgValue(OBJCOPY_add_gnu_debuglink);
+  // The gnu_debuglink's target is expected to not change or else its CRC would
+  // become invalidated and get rejected. We can avoid recalculating the
+  // checksum for every target file inside an archive by precomputing the CRC
+  // here. This prevents a significant amount of I/O.
+  if (!Config.AddGnuDebugLink.empty()) {
+    auto DebugOrErr = MemoryBuffer::getFile(Config.AddGnuDebugLink);
+    if (!DebugOrErr)
+      return createFileError(Config.AddGnuDebugLink, DebugOrErr.getError());
+    auto Debug = std::move(*DebugOrErr);
+    JamCRC CRC;
+    CRC.update(
+        ArrayRef<char>(Debug->getBuffer().data(), Debug->getBuffer().size()));
+    // The CRC32 value needs to be complemented because the JamCRC doesn't
+    // finalize the CRC32 value.
+    Config.GnuDebugLinkCRC32 = ~CRC.getCRC();
+  }
+  Config.BuildIdLinkDir = InputArgs.getLastArgValue(OBJCOPY_build_id_link_dir);
+  if (InputArgs.hasArg(OBJCOPY_build_id_link_input))
+    Config.BuildIdLinkInput =
+        InputArgs.getLastArgValue(OBJCOPY_build_id_link_input);
+  if (InputArgs.hasArg(OBJCOPY_build_id_link_output))
+    Config.BuildIdLinkOutput =
+        InputArgs.getLastArgValue(OBJCOPY_build_id_link_output);
+  Config.SplitDWO = InputArgs.getLastArgValue(OBJCOPY_split_dwo);
+  Config.SymbolsPrefix = InputArgs.getLastArgValue(OBJCOPY_prefix_symbols);
+  Config.AllocSectionsPrefix =
+      InputArgs.getLastArgValue(OBJCOPY_prefix_alloc_sections);
+  if (auto Arg = InputArgs.getLastArg(OBJCOPY_extract_partition))
+    Config.ExtractPartition = Arg->getValue();
+
+  for (auto Arg : InputArgs.filtered(OBJCOPY_redefine_symbol)) {
+    if (!StringRef(Arg->getValue()).contains('='))
+      return createStringError(errc::invalid_argument,
+                               "bad format for --redefine-sym");
+    auto Old2New = StringRef(Arg->getValue()).split('=');
+    if (!Config.SymbolsToRename.insert(Old2New).second)
+      return createStringError(errc::invalid_argument,
+                               "multiple redefinition of symbol '%s'",
+                               Old2New.first.str().c_str());
+  }
+
+  for (auto Arg : InputArgs.filtered(OBJCOPY_redefine_symbols))
+    if (Error E = addSymbolsToRenameFromFile(Config.SymbolsToRename, DC.Alloc,
+                                             Arg->getValue()))
+      return std::move(E);
+
+  for (auto Arg : InputArgs.filtered(OBJCOPY_rename_section)) {
+    Expected<SectionRename> SR =
+        parseRenameSectionValue(StringRef(Arg->getValue()));
+    if (!SR)
+      return SR.takeError();
+    if (!Config.SectionsToRename.try_emplace(SR->OriginalName, *SR).second)
+      return createStringError(errc::invalid_argument,
+                               "multiple renames of section '%s'",
+                               SR->OriginalName.str().c_str());
+  }
+  for (auto Arg : InputArgs.filtered(OBJCOPY_set_section_flags)) {
+    Expected<SectionFlagsUpdate> SFU =
+        parseSetSectionFlagValue(Arg->getValue());
+    if (!SFU)
+      return SFU.takeError();
+    if (!Config.SetSectionFlags.try_emplace(SFU->Name, *SFU).second)
+      return createStringError(
+          errc::invalid_argument,
+          "--set-section-flags set multiple times for section '%s'",
+          SFU->Name.str().c_str());
+  }
+  // Prohibit combinations of --set-section-flags when the section name is used
+  // by --rename-section, either as a source or a destination.
+  for (const auto &E : Config.SectionsToRename) {
+    const SectionRename &SR = E.second;
+    if (Config.SetSectionFlags.count(SR.OriginalName))
+      return createStringError(
+          errc::invalid_argument,
+          "--set-section-flags=%s conflicts with --rename-section=%s=%s",
+          SR.OriginalName.str().c_str(), SR.OriginalName.str().c_str(),
+          SR.NewName.str().c_str());
+    if (Config.SetSectionFlags.count(SR.NewName))
+      return createStringError(
+          errc::invalid_argument,
+          "--set-section-flags=%s conflicts with --rename-section=%s=%s",
+          SR.NewName.str().c_str(), SR.OriginalName.str().c_str(),
+          SR.NewName.str().c_str());
+  }
+
+  for (auto Arg : InputArgs.filtered(OBJCOPY_remove_section))
+    Config.ToRemove.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_keep_section))
+    Config.KeepSection.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_only_section))
+    Config.OnlySection.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_add_section))
+    Config.AddSection.push_back(Arg->getValue());
+  for (auto Arg : InputArgs.filtered(OBJCOPY_dump_section))
+    Config.DumpSection.push_back(Arg->getValue());
+  Config.StripAll = InputArgs.hasArg(OBJCOPY_strip_all);
+  Config.StripAllGNU = InputArgs.hasArg(OBJCOPY_strip_all_gnu);
+  Config.StripDebug = InputArgs.hasArg(OBJCOPY_strip_debug);
+  Config.StripDWO = InputArgs.hasArg(OBJCOPY_strip_dwo);
+  Config.StripSections = InputArgs.hasArg(OBJCOPY_strip_sections);
+  Config.StripNonAlloc = InputArgs.hasArg(OBJCOPY_strip_non_alloc);
+  Config.StripUnneeded = InputArgs.hasArg(OBJCOPY_strip_unneeded);
+  Config.ExtractDWO = InputArgs.hasArg(OBJCOPY_extract_dwo);
+  Config.ExtractMainPartition =
+      InputArgs.hasArg(OBJCOPY_extract_main_partition);
+  Config.LocalizeHidden = InputArgs.hasArg(OBJCOPY_localize_hidden);
+  Config.Weaken = InputArgs.hasArg(OBJCOPY_weaken);
+  if (InputArgs.hasArg(OBJCOPY_discard_all, OBJCOPY_discard_locals))
+    Config.DiscardMode =
+        InputArgs.hasFlag(OBJCOPY_discard_all, OBJCOPY_discard_locals)
+            ? DiscardType::All
+            : DiscardType::Locals;
+  Config.OnlyKeepDebug = InputArgs.hasArg(OBJCOPY_only_keep_debug);
+  Config.KeepFileSymbols = InputArgs.hasArg(OBJCOPY_keep_file_symbols);
+  Config.DecompressDebugSections =
+      InputArgs.hasArg(OBJCOPY_decompress_debug_sections);
+  if (Config.DiscardMode == DiscardType::All)
+    Config.StripDebug = true;
+  for (auto Arg : InputArgs.filtered(OBJCOPY_localize_symbol))
+    Config.SymbolsToLocalize.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_localize_symbols))
+    if (Error E = addSymbolsFromFile(Config.SymbolsToLocalize, DC.Alloc,
+                                     Arg->getValue(), UseRegex))
+      return std::move(E);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_keep_global_symbol))
+    Config.SymbolsToKeepGlobal.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_keep_global_symbols))
+    if (Error E = addSymbolsFromFile(Config.SymbolsToKeepGlobal, DC.Alloc,
+                                     Arg->getValue(), UseRegex))
+      return std::move(E);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_globalize_symbol))
+    Config.SymbolsToGlobalize.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_globalize_symbols))
+    if (Error E = addSymbolsFromFile(Config.SymbolsToGlobalize, DC.Alloc,
+                                     Arg->getValue(), UseRegex))
+      return std::move(E);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_weaken_symbol))
+    Config.SymbolsToWeaken.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_weaken_symbols))
+    if (Error E = addSymbolsFromFile(Config.SymbolsToWeaken, DC.Alloc,
+                                     Arg->getValue(), UseRegex))
+      return std::move(E);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_strip_symbol))
+    Config.SymbolsToRemove.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_strip_symbols))
+    if (Error E = addSymbolsFromFile(Config.SymbolsToRemove, DC.Alloc,
+                                     Arg->getValue(), UseRegex))
+      return std::move(E);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_strip_unneeded_symbol))
+    Config.UnneededSymbolsToRemove.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_strip_unneeded_symbols))
+    if (Error E = addSymbolsFromFile(Config.UnneededSymbolsToRemove, DC.Alloc,
+                                     Arg->getValue(), UseRegex))
+      return std::move(E);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_keep_symbol))
+    Config.SymbolsToKeep.emplace_back(Arg->getValue(), UseRegex);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_keep_symbols))
+    if (Error E = addSymbolsFromFile(Config.SymbolsToKeep, DC.Alloc,
+                                     Arg->getValue(), UseRegex))
+      return std::move(E);
+  for (auto Arg : InputArgs.filtered(OBJCOPY_add_symbol)) {
+    Expected<NewSymbolInfo> NSI = parseNewSymbolInfo(Arg->getValue());
+    if (!NSI)
+      return NSI.takeError();
+    Config.SymbolsToAdd.push_back(*NSI);
+  }
+
+  Config.AllowBrokenLinks = InputArgs.hasArg(OBJCOPY_allow_broken_links);
+
+  Config.DeterministicArchives = InputArgs.hasFlag(
+      OBJCOPY_enable_deterministic_archives,
+      OBJCOPY_disable_deterministic_archives, /*default=*/true);
+
+  Config.PreserveDates = InputArgs.hasArg(OBJCOPY_preserve_dates);
+
+  if (Config.PreserveDates &&
+      (Config.OutputFilename == "-" || Config.InputFilename == "-"))
+    return createStringError(errc::invalid_argument,
+                             "--preserve-dates requires a file");
+
+  for (auto Arg : InputArgs)
+    if (Arg->getOption().matches(OBJCOPY_set_start)) {
+      auto EAddr = getAsInteger<uint64_t>(Arg->getValue());
+      if (!EAddr)
+        return createStringError(
+            EAddr.getError(), "bad entry point address: '%s'", Arg->getValue());
+
+      Config.EntryExpr = [EAddr](uint64_t) { return *EAddr; };
+    } else if (Arg->getOption().matches(OBJCOPY_change_start)) {
+      auto EIncr = getAsInteger<int64_t>(Arg->getValue());
+      if (!EIncr)
+        return createStringError(EIncr.getError(),
+                                 "bad entry point increment: '%s'",
+                                 Arg->getValue());
+      auto Expr = Config.EntryExpr ? std::move(Config.EntryExpr)
+                                   : [](uint64_t A) { return A; };
+      Config.EntryExpr = [Expr, EIncr](uint64_t EAddr) {
+        return Expr(EAddr) + *EIncr;
+      };
+    }
+
+  if (Config.DecompressDebugSections &&
+      Config.CompressionType != DebugCompressionType::None) {
+    return createStringError(
+        errc::invalid_argument,
+        "cannot specify both --compress-debug-sections and "
+        "--decompress-debug-sections");
+  }
+
+  if (Config.DecompressDebugSections && !zlib::isAvailable())
+    return createStringError(
+        errc::invalid_argument,
+        "LLVM was not compiled with LLVM_ENABLE_ZLIB: cannot decompress");
+
+  if (Config.ExtractPartition && Config.ExtractMainPartition)
+    return createStringError(errc::invalid_argument,
+                             "cannot specify --extract-partition together with "
+                             "--extract-main-partition");
+
+  DC.CopyConfigs.push_back(std::move(Config));
+  return std::move(DC);
+}
+
+// ParseStripOptions returns the config and sets the input arguments. If a
+// help flag is set then ParseStripOptions will print the help messege and
+// exit.
+Expected<DriverConfig>
+parseStripOptions(ArrayRef<const char *> ArgsArr,
+                  std::function<Error(Error)> ErrorCallback) {
+  StripOptTable T;
+  unsigned MissingArgumentIndex, MissingArgumentCount;
+  llvm::opt::InputArgList InputArgs =
+      T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
+
+  if (InputArgs.size() == 0) {
+    T.PrintHelp(errs(), "llvm-strip [options] file...", "strip tool");
+    exit(1);
+  }
+
+  if (InputArgs.hasArg(STRIP_help)) {
+    T.PrintHelp(outs(), "llvm-strip [options] file...", "strip tool");
+    exit(0);
+  }
+
+  if (InputArgs.hasArg(STRIP_version)) {
+    outs() << "llvm-strip, compatible with GNU strip\n";
+    cl::PrintVersionMessage();
+    exit(0);
+  }
+
+  SmallVector<StringRef, 2> Positional;
+  for (auto Arg : InputArgs.filtered(STRIP_UNKNOWN))
+    return createStringError(errc::invalid_argument, "unknown argument '%s'",
+                             Arg->getAsString(InputArgs).c_str());
+  for (auto Arg : InputArgs.filtered(STRIP_INPUT))
+    Positional.push_back(Arg->getValue());
+
+  if (Positional.empty())
+    return createStringError(errc::invalid_argument, "no input file specified");
+
+  if (Positional.size() > 1 && InputArgs.hasArg(STRIP_output))
+    return createStringError(
+        errc::invalid_argument,
+        "multiple input files cannot be used in combination with -o");
+
+  CopyConfig Config;
+  bool UseRegexp = InputArgs.hasArg(STRIP_regex);
+  Config.AllowBrokenLinks = InputArgs.hasArg(STRIP_allow_broken_links);
+  Config.StripDebug = InputArgs.hasArg(STRIP_strip_debug);
+
+  if (InputArgs.hasArg(STRIP_discard_all, STRIP_discard_locals))
+    Config.DiscardMode =
+        InputArgs.hasFlag(STRIP_discard_all, STRIP_discard_locals)
+            ? DiscardType::All
+            : DiscardType::Locals;
+  Config.StripUnneeded = InputArgs.hasArg(STRIP_strip_unneeded);
+  if (auto Arg = InputArgs.getLastArg(STRIP_strip_all, STRIP_no_strip_all))
+    Config.StripAll = Arg->getOption().getID() == STRIP_strip_all;
+  Config.StripAllGNU = InputArgs.hasArg(STRIP_strip_all_gnu);
+  Config.OnlyKeepDebug = InputArgs.hasArg(STRIP_only_keep_debug);
+  Config.KeepFileSymbols = InputArgs.hasArg(STRIP_keep_file_symbols);
+
+  for (auto Arg : InputArgs.filtered(STRIP_keep_section))
+    Config.KeepSection.emplace_back(Arg->getValue(), UseRegexp);
+
+  for (auto Arg : InputArgs.filtered(STRIP_remove_section))
+    Config.ToRemove.emplace_back(Arg->getValue(), UseRegexp);
+
+  for (auto Arg : InputArgs.filtered(STRIP_strip_symbol))
+    Config.SymbolsToRemove.emplace_back(Arg->getValue(), UseRegexp);
+
+  for (auto Arg : InputArgs.filtered(STRIP_keep_symbol))
+    Config.SymbolsToKeep.emplace_back(Arg->getValue(), UseRegexp);
+
+  if (!InputArgs.hasArg(STRIP_no_strip_all) && !Config.StripDebug &&
+      !Config.StripUnneeded && Config.DiscardMode == DiscardType::None &&
+      !Config.StripAllGNU && Config.SymbolsToRemove.empty())
+    Config.StripAll = true;
+
+  if (Config.DiscardMode == DiscardType::All)
+    Config.StripDebug = true;
+
+  Config.DeterministicArchives =
+      InputArgs.hasFlag(STRIP_enable_deterministic_archives,
+                        STRIP_disable_deterministic_archives, /*default=*/true);
+
+  Config.PreserveDates = InputArgs.hasArg(STRIP_preserve_dates);
+  Config.InputFormat = FileFormat::Unspecified;
+  Config.OutputFormat = FileFormat::Unspecified;
+
+  DriverConfig DC;
+  if (Positional.size() == 1) {
+    Config.InputFilename = Positional[0];
+    Config.OutputFilename =
+        InputArgs.getLastArgValue(STRIP_output, Positional[0]);
+    DC.CopyConfigs.push_back(std::move(Config));
+  } else {
+    StringMap<unsigned> InputFiles;
+    for (StringRef Filename : Positional) {
+      if (InputFiles[Filename]++ == 1) {
+        if (Filename == "-")
+          return createStringError(
+              errc::invalid_argument,
+              "cannot specify '-' as an input file more than once");
+        if (Error E = ErrorCallback(createStringError(
+                errc::invalid_argument, "'%s' was already specified",
+                Filename.str().c_str())))
+          return std::move(E);
+      }
+      Config.InputFilename = Filename;
+      Config.OutputFilename = Filename;
+      DC.CopyConfigs.push_back(Config);
+    }
+  }
+
+  if (Config.PreserveDates && (is_contained(Positional, "-") ||
+                               InputArgs.getLastArgValue(STRIP_output) == "-"))
+    return createStringError(errc::invalid_argument,
+                             "--preserve-dates requires a file");
+
+  return std::move(DC);
+}
+
+} // namespace objcopy
+} // namespace llvm