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llvm-mirror/tools/llvm-objcopy/CopyConfig.cpp
Alexander Shaposhnikov c942981326 Introduce llvm-install-name-tool 
This diff adds a new "driver" for llvm-objcopy
which is supposed to emulate the behavior of install-name-tool.
This is a recommit of b5913e6 with ubsan, test dependencies issues fixed.

Differential revision: https://reviews.llvm.org/D69146

Test plan: make check-all
2019-11-19 23:42:37 -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 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<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}},
};
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;
}
static void printHelp(const opt::OptTable &OptTable, raw_ostream &OS,
StringRef ToolName) {
OptTable.PrintHelp(OS, (ToolName + " input [output]").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(), "llvm-objcopy");
exit(1);
}
if (InputArgs.hasArg(OBJCOPY_help)) {
printHelp(T, outs(), "llvm-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.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_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;
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 (InputArgs.size() == 0) {
printHelp(T, errs(), "llvm-install-name-tool");
exit(1);
}
if (InputArgs.hasArg(INSTALL_NAME_TOOL_help)) {
printHelp(T, outs(), "llvm-install-name-tool");
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());
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);
}
// 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(), "llvm-strip");
exit(1);
}
if (InputArgs.hasArg(STRIP_help)) {
printHelp(T, outs(), "llvm-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.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.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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