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llvm-mirror/tools/llvm-objcopy/CopyConfig.cpp
James Henderson 797cb8f639 [llvm-objcopy]Add support for *-freebsd output formats 
GNU objcopy can support output formats like elf32-i386-freebsd and
elf64-x86-64-freebsd. The only difference from their regular non-freebsd
counterparts that I have observed is that the freebsd versions set the
OS/ABI field to ELFOSABI_FREEBSD. This patch sets the OS/ABI field
according based on the format whenever --output-format is specified.

Reviewed by: rupprecht, grimar

Differential Revision: https://reviews.llvm.org/D59645

llvm-svn: 356737
2019-03-22 10:21:09 +00:00

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31 KiB
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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/BitmaskEnum.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.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/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) {}
};
enum SectionFlag {
SecNone = 0,
SecAlloc = 1 << 0,
SecLoad = 1 << 1,
SecNoload = 1 << 2,
SecReadonly = 1 << 3,
SecDebug = 1 << 4,
SecCode = 1 << 5,
SecData = 1 << 6,
SecRom = 1 << 7,
SecMerge = 1 << 8,
SecStrings = 1 << 9,
SecContents = 1 << 10,
SecShare = 1 << 11,
LLVM_MARK_AS_BITMASK_ENUM(/* LargestValue = */ SecShare)
};
} // namespace
static SectionFlag parseSectionRenameFlag(StringRef SectionName) {
return llvm::StringSwitch<SectionFlag>(SectionName)
.Case("alloc", SectionFlag::SecAlloc)
.Case("load", SectionFlag::SecLoad)
.Case("noload", SectionFlag::SecNoload)
.Case("readonly", SectionFlag::SecReadonly)
.Case("debug", SectionFlag::SecDebug)
.Case("code", SectionFlag::SecCode)
.Case("data", SectionFlag::SecData)
.Case("rom", SectionFlag::SecRom)
.Case("merge", SectionFlag::SecMerge)
.Case("strings", SectionFlag::SecStrings)
.Case("contents", SectionFlag::SecContents)
.Case("share", SectionFlag::SecShare)
.Default(SectionFlag::SecNone);
}
static Expected<uint64_t>
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;
}
uint64_t NewFlags = 0;
if (ParsedFlags & SectionFlag::SecAlloc)
NewFlags |= ELF::SHF_ALLOC;
if (!(ParsedFlags & SectionFlag::SecReadonly))
NewFlags |= ELF::SHF_WRITE;
if (ParsedFlags & SectionFlag::SecCode)
NewFlags |= ELF::SHF_EXECINSTR;
if (ParsedFlags & SectionFlag::SecMerge)
NewFlags |= ELF::SHF_MERGE;
if (ParsedFlags & SectionFlag::SecStrings)
NewFlags |= ELF::SHF_STRINGS;
return NewFlags;
}
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<uint64_t> 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<uint64_t> 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, OS/ABI, 64bit, LittleEndian}
{"aarch64", {ELF::EM_AARCH64, ELF::ELFOSABI_NONE, true, true}},
{"arm", {ELF::EM_ARM, ELF::ELFOSABI_NONE, false, true}},
{"i386", {ELF::EM_386, ELF::ELFOSABI_NONE, false, true}},
{"i386:x86-64", {ELF::EM_X86_64, ELF::ELFOSABI_NONE, true, true}},
{"powerpc:common64", {ELF::EM_PPC64, ELF::ELFOSABI_NONE, true, true}},
{"sparc", {ELF::EM_SPARC, ELF::ELFOSABI_NONE, false, true}},
{"x86-64", {ELF::EM_X86_64, ELF::ELFOSABI_NONE, 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();
}
static const StringMap<MachineInfo> OutputFormatMap{
// Name, {EMachine, OSABI, 64bit, LittleEndian}
{"elf32-i386", {ELF::EM_386, ELF::ELFOSABI_NONE, false, true}},
{"elf32-i386-freebsd", {ELF::EM_386, ELF::ELFOSABI_FREEBSD, false, true}},
{"elf32-powerpcle", {ELF::EM_PPC, ELF::ELFOSABI_NONE, false, true}},
{"elf32-x86-64", {ELF::EM_X86_64, ELF::ELFOSABI_NONE, false, true}},
{"elf64-powerpcle", {ELF::EM_PPC64, ELF::ELFOSABI_NONE, true, true}},
{"elf64-x86-64", {ELF::EM_X86_64, ELF::ELFOSABI_NONE, true, true}},
{"elf64-x86-64-freebsd",
{ELF::EM_X86_64, ELF::ELFOSABI_FREEBSD, true, true}},
};
static Expected<const MachineInfo &>
getOutputFormatMachineInfo(StringRef Format) {
auto Iter = OutputFormatMap.find(Format);
if (Iter == std::end(OutputFormatMap))
return createStringError(errc::invalid_argument,
"Invalid output format: '%s'",
Format.str().c_str());
return Iter->getValue();
}
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);
if (InputArgs.hasArg(OBJCOPY_target)) {
Config.InputFormat = InputArgs.getLastArgValue(OBJCOPY_target);
Config.OutputFormat = InputArgs.getLastArgValue(OBJCOPY_target);
} else {
Config.InputFormat = InputArgs.getLastArgValue(OBJCOPY_input_target);
Config.OutputFormat = InputArgs.getLastArgValue(OBJCOPY_output_target);
}
if (Config.InputFormat == "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;
}
if (!Config.OutputFormat.empty() && Config.OutputFormat != "binary") {
Expected<const MachineInfo &> MI =
getOutputFormatMachineInfo(Config.OutputFormat);
if (!MI)
return MI.takeError();
Config.OutputArch = *MI;
}
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);
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);
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.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);
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_add_symbol)) {
Expected<NewSymbolInfo> NSI = parseNewSymbolInfo(Arg->getValue());
if (!NSI)
return NSI.takeError();
Config.SymbolsToAdd.push_back(*NSI);
}
Config.DeterministicArchives = InputArgs.hasFlag(
OBJCOPY_enable_deterministic_archives,
OBJCOPY_disable_deterministic_archives, /*default=*/true);
Config.PreserveDates = InputArgs.hasArg(OBJCOPY_preserve_dates);
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 --compress-debug-sections at the same time as "
"--decompress-debug-sections at the same time");
}
if (Config.DecompressDebugSections && !zlib::isAvailable())
return createStringError(
errc::invalid_argument,
"LLVM was not compiled with LLVM_ENABLE_ZLIB: cannot decompress");
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) {
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<const char *, 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.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);
Config.StripAll = InputArgs.hasArg(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 (!Config.StripDebug && !Config.StripUnneeded &&
Config.DiscardMode == DiscardType::None && !Config.StripAllGNU && Config.SymbolsToRemove.empty())
Config.StripAll = true;
Config.DeterministicArchives =
InputArgs.hasFlag(STRIP_enable_deterministic_archives,
STRIP_disable_deterministic_archives, /*default=*/true);
Config.PreserveDates = InputArgs.hasArg(STRIP_preserve_dates);
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 {
for (const char *Filename : Positional) {
Config.InputFilename = Filename;
Config.OutputFilename = Filename;
DC.CopyConfigs.push_back(Config);
}
}
return std::move(DC);
}
} // namespace objcopy
} // namespace llvm
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