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ConfigManager.cpp
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//===- ConfigManager.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 "ConfigManager.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/Error.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/StringSaver.h"
#include <memory>
using namespace llvm;
using namespace llvm::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) {
setGroupedShortOptions(true);
}
};
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) { setGroupedShortOptions(true); }
};
} // 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;
}
namespace {
struct TargetInfo {
FileFormat Format;
MachineInfo Machine;
};
} // namespace
// 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,
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,
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";
}
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.
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()>;
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.Flags.push_back(SymbolFlag::Global); })
.CaseLower("local", [&] { SI.Flags.push_back(SymbolFlag::Local); })
.CaseLower("weak", [&] { SI.Flags.push_back(SymbolFlag::Weak); })
.CaseLower("default",
[&] { SI.Flags.push_back(SymbolFlag::Default); })
.CaseLower("hidden",
[&] { SI.Flags.push_back(SymbolFlag::Hidden); })
.CaseLower("protected",
[&] { SI.Flags.push_back(SymbolFlag::Protected); })
.CaseLower("file", [&] { SI.Flags.push_back(SymbolFlag::File); })
.CaseLower("section",
[&] { SI.Flags.push_back(SymbolFlag::Section); })
.CaseLower("object",
[&] { SI.Flags.push_back(SymbolFlag::Object); })
.CaseLower("function",
[&] { SI.Flags.push_back(SymbolFlag::Function); })
.CaseLower(
"indirect-function",
[&] { SI.Flags.push_back(SymbolFlag::IndirectFunction); })
.CaseLower("debug", [&] { SI.Flags.push_back(SymbolFlag::Debug); })
.CaseLower("constructor",
[&] { SI.Flags.push_back(SymbolFlag::Constructor); })
.CaseLower("warning",
[&] { SI.Flags.push_back(SymbolFlag::Warning); })
.CaseLower("indirect",
[&] { SI.Flags.push_back(SymbolFlag::Indirect); })
.CaseLower("synthetic",
[&] { SI.Flags.push_back(SymbolFlag::Synthetic); })
.CaseLower("unique-object",
[&] { SI.Flags.push_back(SymbolFlag::UniqueObject); })
.StartsWithLower("before=",
[&] {
StringRef SymNamePart =
Flags[I].split('=').second;
if (!SymNamePart.empty())
SI.BeforeSyms.push_back(SymNamePart);
})
.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;
}
Expected<const ELFConfig &> ConfigManager::getELFConfig() const {
if (Common.StripSwiftSymbols || Common.KeepUndefined)
return createStringError(llvm::errc::invalid_argument,
"option not supported by llvm-objcopy for ELF");
return ELF;
}
Expected<const COFFConfig &> ConfigManager::getCOFFConfig() const {
if (Common.AllowBrokenLinks || !Common.SplitDWO.empty() ||
!Common.SymbolsPrefix.empty() || !Common.AllocSectionsPrefix.empty() ||
!Common.DumpSection.empty() || !Common.KeepSection.empty() ||
ELF.NewSymbolVisibility || !Common.SymbolsToGlobalize.empty() ||
!Common.SymbolsToKeep.empty() || !Common.SymbolsToLocalize.empty() ||
!Common.SymbolsToWeaken.empty() || !Common.SymbolsToKeepGlobal.empty() ||
!Common.SectionsToRename.empty() || !Common.SetSectionAlignment.empty() ||
Common.ExtractDWO || Common.LocalizeHidden || Common.PreserveDates ||
Common.StripDWO || Common.StripNonAlloc || Common.StripSections ||
Common.StripSwiftSymbols || Common.KeepUndefined || Common.Weaken ||
Common.DecompressDebugSections ||
Common.DiscardMode == DiscardType::Locals ||
!Common.SymbolsToAdd.empty() || Common.EntryExpr) {
return createStringError(llvm::errc::invalid_argument,
"option not supported by llvm-objcopy for COFF");
}
return COFF;
}
Expected<const MachOConfig &> ConfigManager::getMachOConfig() const {
if (Common.AllowBrokenLinks || !Common.SplitDWO.empty() ||
!Common.SymbolsPrefix.empty() || !Common.AllocSectionsPrefix.empty() ||
!Common.KeepSection.empty() || ELF.NewSymbolVisibility ||
!Common.SymbolsToGlobalize.empty() || !Common.SymbolsToKeep.empty() ||
!Common.SymbolsToLocalize.empty() || !Common.SymbolsToWeaken.empty() ||
!Common.SymbolsToKeepGlobal.empty() || !Common.SectionsToRename.empty() ||
!Common.UnneededSymbolsToRemove.empty() ||
!Common.SetSectionAlignment.empty() || !Common.SetSectionFlags.empty() ||
Common.ExtractDWO || Common.LocalizeHidden || Common.PreserveDates ||
Common.StripAllGNU || Common.StripDWO || Common.StripNonAlloc ||
Common.StripSections || Common.Weaken || Common.DecompressDebugSections ||
Common.StripUnneeded || Common.DiscardMode == DiscardType::Locals ||
!Common.SymbolsToAdd.empty() || Common.EntryExpr) {
return createStringError(llvm::errc::invalid_argument,
"option not supported by llvm-objcopy for MachO");
}
return MachO;
}
Expected<const WasmConfig &> ConfigManager::getWasmConfig() const {
if (!Common.AddGnuDebugLink.empty() || Common.ExtractPartition ||
!Common.SplitDWO.empty() || !Common.SymbolsPrefix.empty() ||
!Common.AllocSectionsPrefix.empty() ||
Common.DiscardMode != DiscardType::None || ELF.NewSymbolVisibility ||
!Common.SymbolsToAdd.empty() || !Common.RPathToAdd.empty() ||
!Common.SymbolsToGlobalize.empty() || !Common.SymbolsToLocalize.empty() ||
!Common.SymbolsToKeep.empty() || !Common.SymbolsToRemove.empty() ||
!Common.UnneededSymbolsToRemove.empty() ||
!Common.SymbolsToWeaken.empty() || !Common.SymbolsToKeepGlobal.empty() ||
!Common.SectionsToRename.empty() || !Common.SetSectionAlignment.empty() ||
!Common.SetSectionFlags.empty() || !Common.SymbolsToRename.empty()) {
return createStringError(
llvm::errc::invalid_argument,
"only flags for section dumping, removal, and addition are supported");
}
return Wasm;
}
// 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>
objcopy::parseObjcopyOptions(ArrayRef<const char *> RawArgsArr,
function_ref<Error(Error)> ErrorCallback) {
DriverConfig DC;
ObjcopyOptTable T;
const char *const *DashDash =
std::find_if(RawArgsArr.begin(), RawArgsArr.end(),
[](StringRef Str) { return Str == "--"; });
ArrayRef<const char *> ArgsArr = makeArrayRef(RawArgsArr.begin(), DashDash);
if (DashDash != RawArgsArr.end())
DashDash = std::next(DashDash);
unsigned MissingArgumentIndex, MissingArgumentCount;
llvm::opt::InputArgList InputArgs =
T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
if (InputArgs.size() == 0 && DashDash == RawArgsArr.end()) {
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());
std::copy(DashDash, RawArgsArr.end(), std::back_inserter(Positional));
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");
ConfigManager ConfigMgr;
CommonConfig &Config = ConfigMgr.Common;
ELFConfig &ELFConfig = ConfigMgr.ELF;
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)) {
const uint8_t Invalid = 0xff;
StringRef VisibilityStr =
InputArgs.getLastArgValue(OBJCOPY_new_symbol_visibility);
ELFConfig.NewSymbolVisibility = StringSwitch<uint8_t>(VisibilityStr)
.Case("default", ELF::STV_DEFAULT)
.Case("hidden", ELF::STV_HIDDEN)
.Case("internal", ELF::STV_INTERNAL)
.Case("protected", ELF::STV_PROTECTED)
.Default(Invalid);
if (ELFConfig.NewSymbolVisibility == Invalid)
return createStringError(errc::invalid_argument,
"'%s' is not a valid symbol visibility",
VisibilityStr.str().c_str());
}
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)) {
StringRef Value(Arg->getValue());
if (Value.split('=').second.empty())
return createStringError(
errc::invalid_argument,
"bad format for --dump-section, expected section=file");
Config.DumpSection.push_back(Value);
}
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.KeepUndefined = InputArgs.hasArg(OBJCOPY_keep_undefined);
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)) {
Expected<NewSymbolInfo> SymInfo = parseNewSymbolInfo(Arg->getValue());
if (!SymInfo)
return SymInfo.takeError();
Config.SymbolsToAdd.push_back(*SymInfo);
}
Config.AllowBrokenLinks = InputArgs.hasArg(OBJCOPY_allow_broken_links);
Config.DeterministicArchives = InputArgs.hasFlag(
OBJCOPY_enable_deterministic_archives,
OBJCOPY_disable_deterministic_archives, /*default=*/true);