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llvm-mirror/tools/llvm-objcopy/CopyConfig.cpp
Fangrui Song 3296757d5e [llvm-objcopy] Delete --build-id-link-{dir,input,output} 
The few options are niche. They solved a problem which was traditionally solved
with more shell commands (`llvm-readelf -n` fetches the Build ID. Then
`ln` is used to hard link the file to a directory derived from the Build ID.)

Due to limitation, they are no longer used by Fuchsia and they don't appear to
be used elsewhere (checked with Google Search and Debian Code Search). So delete
them without a transition period.

Announcement: https://lists.llvm.org/pipermail/llvm-dev/2021-February/148446.html

Differential Revision: https://reviews.llvm.org/D96310
2021-02-15 11:17:32 -08:00

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//===- 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/CRC.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/Errc.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 InstallNameToolID {
INSTALL_NAME_TOOL_INVALID = 0, // This is not an option ID.
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELPTEXT, METAVAR, VALUES) \
INSTALL_NAME_TOOL_##ID,
#include "InstallNameToolOpts.inc"
#undef OPTION
};
#define PREFIX(NAME, VALUE) \
const char *const INSTALL_NAME_TOOL_##NAME[] = VALUE;
#include "InstallNameToolOpts.inc"
#undef PREFIX
static const opt::OptTable::Info InstallNameToolInfoTable[] = {
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELPTEXT, METAVAR, VALUES) \
{INSTALL_NAME_TOOL_##PREFIX, \
NAME, \
HELPTEXT, \
METAVAR, \
INSTALL_NAME_TOOL_##ID, \
opt::Option::KIND##Class, \
PARAM, \
FLAGS, \
INSTALL_NAME_TOOL_##GROUP, \
INSTALL_NAME_TOOL_##ALIAS, \
ALIASARGS, \
VALUES},
#include "InstallNameToolOpts.inc"
#undef OPTION
};
class InstallNameToolOptTable : public opt::OptTable {
public:
InstallNameToolOptTable() : OptTable(InstallNameToolInfoTable) {}
};
enum BitcodeStripID {
BITCODE_STRIP_INVALID = 0, // This is not an option ID.
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELPTEXT, METAVAR, VALUES) \
BITCODE_STRIP_##ID,
#include "BitcodeStripOpts.inc"
#undef OPTION
};
#define PREFIX(NAME, VALUE) const char *const BITCODE_STRIP_##NAME[] = VALUE;
#include "BitcodeStripOpts.inc"
#undef PREFIX
static const opt::OptTable::Info BitcodeStripInfoTable[] = {
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELPTEXT, METAVAR, VALUES) \
{BITCODE_STRIP_##PREFIX, \
NAME, \
HELPTEXT, \
METAVAR, \
BITCODE_STRIP_##ID, \
opt::Option::KIND##Class, \
PARAM, \
FLAGS, \
BITCODE_STRIP_##GROUP, \
BITCODE_STRIP_##ALIAS, \
ALIASARGS, \
VALUES},
#include "BitcodeStripOpts.inc"
#undef OPTION
};
class BitcodeStripOptTable : public opt::OptTable {
public:
BitcodeStripOptTable() : OptTable(BitcodeStripInfoTable) {}
};
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)
.CaseLower("exclude", SectionFlag::SecExclude)
.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, exclude, 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<std::pair<StringRef, uint64_t>>
parseSetSectionAlignment(StringRef FlagValue) {
if (!FlagValue.contains('='))
return createStringError(
errc::invalid_argument,
"bad format for --set-section-alignment: missing '='");
auto Split = StringRef(FlagValue).split('=');
if (Split.first.empty())
return createStringError(
errc::invalid_argument,
"bad format for --set-section-alignment: missing section name");
uint64_t NewAlign;
if (Split.second.getAsInteger(0, NewAlign))
return createStringError(errc::invalid_argument,
"invalid alignment for --set-section-alignment: '%s'",
Split.second.str().c_str());
return std::make_pair(Split.first, NewAlign);
}
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;
}
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}},
{"elf32-hexagon", {ELF::EM_HEXAGON, 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(NameMatcher &Symbols, BumpPtrAllocator &Alloc,
StringRef Filename, MatchStyle MS,
llvm::function_ref<Error(Error)> ErrorCallback) {
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())
if (Error E = Symbols.addMatcher(NameOrPattern::create(
Saver.save(TrimmedLine), MS, ErrorCallback)))
return E;
}
return Error::success();
}
Expected<NameOrPattern>
NameOrPattern::create(StringRef Pattern, MatchStyle MS,
llvm::function_ref<Error(Error)> ErrorCallback) {
switch (MS) {
case MatchStyle::Literal:
return NameOrPattern(Pattern);
case MatchStyle::Wildcard: {
SmallVector<char, 32> Data;
bool IsPositiveMatch = true;
if (Pattern[0] == '!') {
IsPositiveMatch = false;
Pattern = Pattern.drop_front();
}
Expected<GlobPattern> GlobOrErr = GlobPattern::create(Pattern);
// If we couldn't create it as a glob, report the error, but try again with
// a literal if the error reporting is non-fatal.
if (!GlobOrErr) {
if (Error E = ErrorCallback(GlobOrErr.takeError()))
return std::move(E);
return create(Pattern, MatchStyle::Literal, ErrorCallback);
}
return NameOrPattern(std::make_shared<GlobPattern>(*GlobOrErr),
IsPositiveMatch);
}
case MatchStyle::Regex: {
SmallVector<char, 32> Data;
return NameOrPattern(std::make_shared<Regex>(
("^" + Pattern.ltrim('^').rtrim('$') + "$").toStringRef(Data)));
}
}
llvm_unreachable("Unhandled llvm.objcopy.MatchStyle enum");
}
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;
}
namespace {
enum class ToolType { Objcopy, Strip, InstallNameTool, BitcodeStrip };
} // anonymous namespace
static void printHelp(const opt::OptTable &OptTable, raw_ostream &OS,
ToolType Tool) {
StringRef HelpText, ToolName;
switch (Tool) {
case ToolType::Objcopy:
ToolName = "llvm-objcopy";
HelpText = " [options] input [output]";
break;
case ToolType::Strip:
ToolName = "llvm-strip";
HelpText = " [options] inputs...";
break;
case ToolType::InstallNameTool:
ToolName = "llvm-install-name-tool";
HelpText = " [options] input";
break;
case ToolType::BitcodeStrip:
ToolName = "llvm-bitcode-strip";
HelpText = " [options] input";
break;
}
OptTable.PrintHelp(OS, (ToolName + HelpText).str().c_str(),
(ToolName + " tool").str().c_str());
// TODO: Replace this with libOption call once it adds extrahelp support.
// The CommandLine library has a cl::extrahelp class to support this,
// but libOption does not have that yet.
OS << "\nPass @FILE as argument to read options from FILE.\n";
}
// 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,
llvm::function_ref<Error(Error)> ErrorCallback) {
DriverConfig DC;
ObjcopyOptTable T;
unsigned MissingArgumentIndex, MissingArgumentCount;
llvm::opt::InputArgList InputArgs =
T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
if (InputArgs.size() == 0) {
printHelp(T, errs(), ToolType::Objcopy);
exit(1);
}
if (InputArgs.hasArg(OBJCOPY_help)) {
printHelp(T, outs(), ToolType::Objcopy);
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");
if (InputArgs.hasArg(OBJCOPY_regex) && InputArgs.hasArg(OBJCOPY_wildcard))
return createStringError(errc::invalid_argument,
"--regex and --wildcard are incompatible");
MatchStyle SectionMatchStyle = InputArgs.hasArg(OBJCOPY_regex)
? MatchStyle::Regex
: MatchStyle::Wildcard;
MatchStyle SymbolMatchStyle = InputArgs.hasArg(OBJCOPY_regex)
? MatchStyle::Regex
: InputArgs.hasArg(OBJCOPY_wildcard)
? MatchStyle::Wildcard
: MatchStyle::Literal;
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 (InputArgs.hasArg(OBJCOPY_new_symbol_visibility))
Config.NewSymbolVisibility =
InputArgs.getLastArgValue(OBJCOPY_new_symbol_visibility);
Config.OutputFormat = StringSwitch<FileFormat>(OutputFormat)
.Case("binary", FileFormat::Binary)
.Case("ihex", FileFormat::IHex)
.Default(FileFormat::Unspecified);
if (Config.OutputFormat == FileFormat::Unspecified) {
if (OutputFormat.empty()) {
Config.OutputFormat = Config.InputFormat;
} else {
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);
Config.GnuDebugLinkCRC32 =
llvm::crc32(arrayRefFromStringRef(Debug->getBuffer()));
}
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_alignment)) {
Expected<std::pair<StringRef, uint64_t>> NameAndAlign =
parseSetSectionAlignment(Arg->getValue());
if (!NameAndAlign)
return NameAndAlign.takeError();
Config.SetSectionAlignment[NameAndAlign->first] = NameAndAlign->second;
}
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))
if (Error E = Config.ToRemove.addMatcher(NameOrPattern::create(
Arg->getValue(), SectionMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_section))
if (Error E = Config.KeepSection.addMatcher(NameOrPattern::create(
Arg->getValue(), SectionMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_only_section))
if (Error E = Config.OnlySection.addMatcher(NameOrPattern::create(
Arg->getValue(), SectionMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_add_section)) {
StringRef ArgValue(Arg->getValue());
if (!ArgValue.contains('='))
return createStringError(errc::invalid_argument,
"bad format for --add-section: missing '='");
if (ArgValue.split("=").second.empty())
return createStringError(
errc::invalid_argument,
"bad format for --add-section: missing file name");
Config.AddSection.push_back(ArgValue);
}
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;
Config.KeepFileSymbols = true;
}
for (auto Arg : InputArgs.filtered(OBJCOPY_localize_symbol))
if (Error E = Config.SymbolsToLocalize.addMatcher(NameOrPattern::create(
Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_localize_symbols))
if (Error E = addSymbolsFromFile(Config.SymbolsToLocalize, DC.Alloc,
Arg->getValue(), SymbolMatchStyle,
ErrorCallback))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_global_symbol))
if (Error E = Config.SymbolsToKeepGlobal.addMatcher(NameOrPattern::create(
Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_global_symbols))
if (Error E = addSymbolsFromFile(Config.SymbolsToKeepGlobal, DC.Alloc,
Arg->getValue(), SymbolMatchStyle,
ErrorCallback))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_globalize_symbol))
if (Error E = Config.SymbolsToGlobalize.addMatcher(NameOrPattern::create(
Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_globalize_symbols))
if (Error E = addSymbolsFromFile(Config.SymbolsToGlobalize, DC.Alloc,
Arg->getValue(), SymbolMatchStyle,
ErrorCallback))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_weaken_symbol))
if (Error E = Config.SymbolsToWeaken.addMatcher(NameOrPattern::create(
Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_weaken_symbols))
if (Error E = addSymbolsFromFile(Config.SymbolsToWeaken, DC.Alloc,
Arg->getValue(), SymbolMatchStyle,
ErrorCallback))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_strip_symbol))
if (Error E = Config.SymbolsToRemove.addMatcher(NameOrPattern::create(
Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_strip_symbols))
if (Error E = addSymbolsFromFile(Config.SymbolsToRemove, DC.Alloc,
Arg->getValue(), SymbolMatchStyle,
ErrorCallback))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_strip_unneeded_symbol))
if (Error E =
Config.UnneededSymbolsToRemove.addMatcher(NameOrPattern::create(
Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_strip_unneeded_symbols))
if (Error E = addSymbolsFromFile(Config.UnneededSymbolsToRemove, DC.Alloc,
Arg->getValue(), SymbolMatchStyle,
ErrorCallback))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_symbol))
if (Error E = Config.SymbolsToKeep.addMatcher(NameOrPattern::create(
Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_symbols))
if (Error E =
addSymbolsFromFile(Config.SymbolsToKeep, DC.Alloc, Arg->getValue(),
SymbolMatchStyle, ErrorCallback))
return std::move(E);
for (auto Arg : InputArgs.filtered(OBJCOPY_add_symbol))
Config.SymbolsToAdd.push_back(Arg->getValue());
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);
}
// ParseInstallNameToolOptions returns the config and sets the input arguments.
// If a help flag is set then ParseInstallNameToolOptions will print the help
// messege and exit.
Expected<DriverConfig>
parseInstallNameToolOptions(ArrayRef<const char *> ArgsArr) {
DriverConfig DC;
CopyConfig Config;
InstallNameToolOptTable T;
unsigned MissingArgumentIndex, MissingArgumentCount;
llvm::opt::InputArgList InputArgs =
T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
if (MissingArgumentCount)
return createStringError(
errc::invalid_argument,
"missing argument to " +
StringRef(InputArgs.getArgString(MissingArgumentIndex)) +
" option");
if (InputArgs.size() == 0) {
printHelp(T, errs(), ToolType::InstallNameTool);
exit(1);
}
if (InputArgs.hasArg(INSTALL_NAME_TOOL_help)) {
printHelp(T, outs(), ToolType::InstallNameTool);
exit(0);
}
if (InputArgs.hasArg(INSTALL_NAME_TOOL_version)) {
outs() << "llvm-install-name-tool, compatible with cctools "
"install_name_tool\n";
cl::PrintVersionMessage();
exit(0);
}
for (auto Arg : InputArgs.filtered(INSTALL_NAME_TOOL_add_rpath))
Config.RPathToAdd.push_back(Arg->getValue());
for (auto *Arg : InputArgs.filtered(INSTALL_NAME_TOOL_prepend_rpath))
Config.RPathToPrepend.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(INSTALL_NAME_TOOL_delete_rpath)) {
StringRef RPath = Arg->getValue();
// Cannot add and delete the same rpath at the same time.
if (is_contained(Config.RPathToAdd, RPath))
return createStringError(
errc::invalid_argument,
"cannot specify both -add_rpath '%s' and -delete_rpath '%s'",
RPath.str().c_str(), RPath.str().c_str());
if (is_contained(Config.RPathToPrepend, RPath))
return createStringError(
errc::invalid_argument,
"cannot specify both -prepend_rpath '%s' and -delete_rpath '%s'",
RPath.str().c_str(), RPath.str().c_str());
Config.RPathsToRemove.insert(RPath);
}
for (auto *Arg : InputArgs.filtered(INSTALL_NAME_TOOL_rpath)) {
StringRef Old = Arg->getValue(0);
StringRef New = Arg->getValue(1);
auto Match = [=](StringRef RPath) { return RPath == Old || RPath == New; };
// Cannot specify duplicate -rpath entries
auto It1 = find_if(
Config.RPathsToUpdate,
[&Match](const DenseMap<StringRef, StringRef>::value_type &OldNew) {
return Match(OldNew.getFirst()) || Match(OldNew.getSecond());
});
if (It1 != Config.RPathsToUpdate.end())
return createStringError(errc::invalid_argument,
"cannot specify both -rpath '" +
It1->getFirst() + "' '" + It1->getSecond() +
"' and -rpath '" + Old + "' '" + New + "'");
// Cannot specify the same rpath under both -delete_rpath and -rpath
auto It2 = find_if(Config.RPathsToRemove, Match);
if (It2 != Config.RPathsToRemove.end())
return createStringError(errc::invalid_argument,
"cannot specify both -delete_rpath '" + *It2 +
"' and -rpath '" + Old + "' '" + New + "'");
// Cannot specify the same rpath under both -add_rpath and -rpath
auto It3 = find_if(Config.RPathToAdd, Match);
if (It3 != Config.RPathToAdd.end())
return createStringError(errc::invalid_argument,
"cannot specify both -add_rpath '" + *It3 +
"' and -rpath '" + Old + "' '" + New + "'");
// Cannot specify the same rpath under both -prepend_rpath and -rpath.
auto It4 = find_if(Config.RPathToPrepend, Match);
if (It4 != Config.RPathToPrepend.end())
return createStringError(errc::invalid_argument,
"cannot specify both -prepend_rpath '" + *It4 +
"' and -rpath '" + Old + "' '" + New + "'");
Config.RPathsToUpdate.insert({Old, New});
}
if (auto *Arg = InputArgs.getLastArg(INSTALL_NAME_TOOL_id)) {
Config.SharedLibId = Arg->getValue();
if (Config.SharedLibId->empty())
return createStringError(errc::invalid_argument,
"cannot specify an empty id");
}
for (auto *Arg : InputArgs.filtered(INSTALL_NAME_TOOL_change))
Config.InstallNamesToUpdate.insert({Arg->getValue(0), Arg->getValue(1)});
Config.RemoveAllRpaths =
InputArgs.hasArg(INSTALL_NAME_TOOL_delete_all_rpaths);
SmallVector<StringRef, 2> Positional;
for (auto Arg : InputArgs.filtered(INSTALL_NAME_TOOL_UNKNOWN))
return createStringError(errc::invalid_argument, "unknown argument '%s'",
Arg->getAsString(InputArgs).c_str());
for (auto Arg : InputArgs.filtered(INSTALL_NAME_TOOL_INPUT))
Positional.push_back(Arg->getValue());
if (Positional.empty())
return createStringError(errc::invalid_argument, "no input file specified");
if (Positional.size() > 1)
return createStringError(
errc::invalid_argument,
"llvm-install-name-tool expects a single input file");
Config.InputFilename = Positional[0];
Config.OutputFilename = Positional[0];
DC.CopyConfigs.push_back(std::move(Config));
return std::move(DC);
}
Expected<DriverConfig>
parseBitcodeStripOptions(ArrayRef<const char *> ArgsArr) {
DriverConfig DC;
CopyConfig Config;
BitcodeStripOptTable T;
unsigned MissingArgumentIndex, MissingArgumentCount;
opt::InputArgList InputArgs =
T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
if (InputArgs.size() == 0) {
printHelp(T, errs(), ToolType::BitcodeStrip);
exit(1);
}
if (InputArgs.hasArg(BITCODE_STRIP_help)) {
printHelp(T, outs(), ToolType::BitcodeStrip);
exit(0);
}
if (InputArgs.hasArg(BITCODE_STRIP_version)) {
outs() << "llvm-bitcode-strip, compatible with cctools "
"bitcode_strip\n";
cl::PrintVersionMessage();
exit(0);
}
for (auto *Arg : InputArgs.filtered(BITCODE_STRIP_UNKNOWN))
return createStringError(errc::invalid_argument, "unknown argument '%s'",
Arg->getAsString(InputArgs).c_str());
SmallVector<StringRef, 2> Positional;
for (auto *Arg : InputArgs.filtered(BITCODE_STRIP_INPUT))
Positional.push_back(Arg->getValue());
if (Positional.size() > 1)
return createStringError(errc::invalid_argument,
"llvm-bitcode-strip expects a single input file");
assert(!Positional.empty());
Config.InputFilename = Positional[0];
Config.OutputFilename = Positional[0];
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,
llvm::function_ref<Error(Error)> ErrorCallback) {
StripOptTable T;
unsigned MissingArgumentIndex, MissingArgumentCount;
llvm::opt::InputArgList InputArgs =
T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
if (InputArgs.size() == 0) {
printHelp(T, errs(), ToolType::Strip);
exit(1);
}
if (InputArgs.hasArg(STRIP_help)) {
printHelp(T, outs(), ToolType::Strip);
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;
if (InputArgs.hasArg(STRIP_regex) && InputArgs.hasArg(STRIP_wildcard))
return createStringError(errc::invalid_argument,
"--regex and --wildcard are incompatible");
MatchStyle SectionMatchStyle =
InputArgs.hasArg(STRIP_regex) ? MatchStyle::Regex : MatchStyle::Wildcard;
MatchStyle SymbolMatchStyle = InputArgs.hasArg(STRIP_regex)
? MatchStyle::Regex
: InputArgs.hasArg(STRIP_wildcard)
? MatchStyle::Wildcard
: MatchStyle::Literal;
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.StripSections = InputArgs.hasArg(STRIP_strip_sections);
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.StripSwiftSymbols = InputArgs.hasArg(STRIP_strip_swift_symbols);
Config.OnlyKeepDebug = InputArgs.hasArg(STRIP_only_keep_debug);
Config.KeepFileSymbols = InputArgs.hasArg(STRIP_keep_file_symbols);
for (auto Arg : InputArgs.filtered(STRIP_keep_section))
if (Error E = Config.KeepSection.addMatcher(NameOrPattern::create(
Arg->getValue(), SectionMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(STRIP_remove_section))
if (Error E = Config.ToRemove.addMatcher(NameOrPattern::create(
Arg->getValue(), SectionMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(STRIP_strip_symbol))
if (Error E = Config.SymbolsToRemove.addMatcher(NameOrPattern::create(
Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
return std::move(E);
for (auto Arg : InputArgs.filtered(STRIP_keep_symbol))
if (Error E = Config.SymbolsToKeep.addMatcher(NameOrPattern::create(
Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
return std::move(E);
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.KeepFileSymbols = 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
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