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[llvm-objcopy] Factor out CopyConfig

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In this diff we move out CopyConfig from llvm-oobjcopy.cpp into a separate header CopyConfig.h
to enable us (in the future) reuse this class in the other implementations of objcopy (for coff, mach-o).
Additionally this enables us to unload the complexity from llvm-objcopy.cpp a little bit.

Test plan: make check-all

Differential revision: https://reviews.llvm.org/D53006

llvm-svn: 344307
This commit is contained in:
Alexander Shaposhnikov 2018-10-11 22:33:50 +00:00
parent 8d6015e874
commit 6ce293b9e4
5 changed files with 541 additions and 471 deletions
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1
tools/llvm-objcopy/CMakeLists.txt
View File

@ -14,6 +14,7 @@ tablegen(LLVM StripOpts.inc -gen-opt-parser-defs)
add_public_tablegen_target(StripOptsTableGen)
add_llvm_tool(llvm-objcopy
CopyConfig.cpp
llvm-objcopy.cpp
Object.cpp
DEPENDS

424
tools/llvm-objcopy/CopyConfig.cpp Normal file
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@ -0,0 +1,424 @@
//===- CopyConfig.cpp -----------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "CopyConfig.h"
#include "llvm-objcopy.h"
#include "llvm/ADT/BitmaskEnum.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Object/ELFTypes.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/MemoryBuffer.h"
#include <memory>
#include <string>
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, true) {}
};
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, true) {}
};
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 SectionRename parseRenameSectionValue(StringRef FlagValue) {
if (!FlagValue.contains('='))
error("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) {
SectionFlag Flags = SectionFlag::SecNone;
for (size_t I = 1, Size = NameAndFlags.size(); I < Size; ++I) {
SectionFlag Flag = parseSectionRenameFlag(NameAndFlags[I]);
if (Flag == SectionFlag::SecNone)
error("Unrecognized section flag '" + NameAndFlags[I] +
"'. Flags supported for GNU compatibility: alloc, load, noload, "
"readonly, debug, code, data, rom, share, contents, merge, "
"strings.");
Flags |= Flag;
}
SR.NewFlags = 0;
if (Flags & SectionFlag::SecAlloc)
*SR.NewFlags |= ELF::SHF_ALLOC;
if (!(Flags & SectionFlag::SecReadonly))
*SR.NewFlags |= ELF::SHF_WRITE;
if (Flags & SectionFlag::SecCode)
*SR.NewFlags |= ELF::SHF_EXECINSTR;
if (Flags & SectionFlag::SecMerge)
*SR.NewFlags |= ELF::SHF_MERGE;
if (Flags & SectionFlag::SecStrings)
*SR.NewFlags |= ELF::SHF_STRINGS;
}
return SR;
}
static const StringMap<MachineInfo> ArchMap{
// Name, {EMachine, 64bit, LittleEndian}
{"aarch64", {ELF::EM_AARCH64, true, true}},
{"arm", {ELF::EM_ARM, false, true}},
{"i386", {ELF::EM_386, false, true}},
{"i386:x86-64", {ELF::EM_X86_64, true, true}},
{"powerpc:common64", {ELF::EM_PPC64, true, true}},
{"sparc", {ELF::EM_SPARC, false, true}},
{"x86-64", {ELF::EM_X86_64, true, true}},
};
static const MachineInfo &getMachineInfo(StringRef Arch) {
auto Iter = ArchMap.find(Arch);
if (Iter == std::end(ArchMap))
error("Invalid architecture: '" + Arch + "'");
return Iter->getValue();
}
static void addGlobalSymbolsFromFile(std::vector<std::string> &Symbols,
StringRef Filename) {
SmallVector<StringRef, 16> Lines;
auto BufOrErr = MemoryBuffer::getFile(Filename);
if (!BufOrErr)
reportError(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.push_back(TrimmedLine.str());
}
}
// ParseObjcopyOptions returns the config and sets the input arguments. If a
// help flag is set then ParseObjcopyOptions will print the help messege and
// exit.
DriverConfig parseObjcopyOptions(ArrayRef<const char *> ArgsArr) {
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)) {
cl::PrintVersionMessage();
exit(0);
}
SmallVector<const char *, 2> Positional;
for (auto Arg : InputArgs.filtered(OBJCOPY_UNKNOWN))
error("unknown argument '" + Arg->getAsString(InputArgs) + "'");
for (auto Arg : InputArgs.filtered(OBJCOPY_INPUT))
Positional.push_back(Arg->getValue());
if (Positional.empty())
error("No input file specified");
if (Positional.size() > 2)
error("Too many positional arguments");
CopyConfig Config;
Config.InputFilename = Positional[0];
Config.OutputFilename = Positional[Positional.size() == 1 ? 0 : 1];
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())
error("Specified binary input without specifiying an architecture");
Config.BinaryArch = getMachineInfo(BinaryArch);
}
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)
error("Invalid or unsupported --compress-debug-sections format: " +
InputArgs.getLastArgValue(OBJCOPY_compress_debug_sections_eq));
if (!zlib::isAvailable())
error("LLVM was not compiled with LLVM_ENABLE_ZLIB: can not compress.");
}
}
Config.SplitDWO = InputArgs.getLastArgValue(OBJCOPY_split_dwo);
Config.AddGnuDebugLink = InputArgs.getLastArgValue(OBJCOPY_add_gnu_debuglink);
Config.SymbolsPrefix = InputArgs.getLastArgValue(OBJCOPY_prefix_symbols);
for (auto Arg : InputArgs.filtered(OBJCOPY_redefine_symbol)) {
if (!StringRef(Arg->getValue()).contains('='))
error("Bad format for --redefine-sym");
auto Old2New = StringRef(Arg->getValue()).split('=');
if (!Config.SymbolsToRename.insert(Old2New).second)
error("Multiple redefinition of symbol " + Old2New.first);
}
for (auto Arg : InputArgs.filtered(OBJCOPY_rename_section)) {
SectionRename SR = parseRenameSectionValue(StringRef(Arg->getValue()));
if (!Config.SectionsToRename.try_emplace(SR.OriginalName, SR).second)
error("Multiple renames of section " + SR.OriginalName);
}
for (auto Arg : InputArgs.filtered(OBJCOPY_remove_section))
Config.ToRemove.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_keep))
Config.Keep.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_only_keep))
Config.OnlyKeep.push_back(Arg->getValue());
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);
Config.DiscardAll = InputArgs.hasArg(OBJCOPY_discard_all);
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.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_global_symbol))
Config.SymbolsToKeepGlobal.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_global_symbols))
addGlobalSymbolsFromFile(Config.SymbolsToKeepGlobal, Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_globalize_symbol))
Config.SymbolsToGlobalize.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_weaken_symbol))
Config.SymbolsToWeaken.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_strip_symbol))
Config.SymbolsToRemove.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_symbol))
Config.SymbolsToKeep.push_back(Arg->getValue());
Config.PreserveDates = InputArgs.hasArg(OBJCOPY_preserve_dates);
DriverConfig DC;
DC.CopyConfigs.push_back(std::move(Config));
if (Config.DecompressDebugSections &&
Config.CompressionType != DebugCompressionType::None) {
error("Cannot specify --compress-debug-sections at the same time as "
"--decompress-debug-sections at the same time");
}
if (Config.DecompressDebugSections && !zlib::isAvailable())
error("LLVM was not compiled with LLVM_ENABLE_ZLIB: cannot decompress.");
return 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.
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)) {
cl::PrintVersionMessage();
exit(0);
}
SmallVector<const char *, 2> Positional;
for (auto Arg : InputArgs.filtered(STRIP_UNKNOWN))
error("unknown argument '" + Arg->getAsString(InputArgs) + "'");
for (auto Arg : InputArgs.filtered(STRIP_INPUT))
Positional.push_back(Arg->getValue());
if (Positional.empty())
error("No input file specified");
if (Positional.size() > 1 && InputArgs.hasArg(STRIP_output))
error("Multiple input files cannot be used in combination with -o");
CopyConfig Config;
Config.StripDebug = InputArgs.hasArg(STRIP_strip_debug);
Config.DiscardAll = InputArgs.hasArg(STRIP_discard_all);
Config.StripUnneeded = InputArgs.hasArg(STRIP_strip_unneeded);
Config.StripAll = InputArgs.hasArg(STRIP_strip_all);
if (!Config.StripDebug && !Config.StripUnneeded && !Config.DiscardAll)
Config.StripAll = true;
for (auto Arg : InputArgs.filtered(STRIP_remove_section))
Config.ToRemove.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(STRIP_keep_symbol))
Config.SymbolsToKeep.push_back(Arg->getValue());
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 DC;
}
} // namespace objcopy
} // namespace llvm

113
tools/llvm-objcopy/CopyConfig.h Normal file
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@ -0,0 +1,113 @@
//===- CopyConfig.h -------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_OBJCOPY_COPY_CONFIG_H
#define LLVM_TOOLS_LLVM_OBJCOPY_COPY_CONFIG_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
// Necessary for llvm::DebugCompressionType::None
#include "llvm/Target/TargetOptions.h"
#include <string>
#include <vector>
namespace llvm {
namespace objcopy {
// This type keeps track of the machine info for various architectures. This
// lets us map architecture names to ELF types and the e_machine value of the
// ELF file.
struct MachineInfo {
uint16_t EMachine;
bool Is64Bit;
bool IsLittleEndian;
};
struct SectionRename {
StringRef OriginalName;
StringRef NewName;
Optional<uint64_t> NewFlags;
};
// Configuration for copying/stripping a single file.
struct CopyConfig {
// Main input/output options
StringRef InputFilename;
StringRef InputFormat;
StringRef OutputFilename;
StringRef OutputFormat;
// Only applicable for --input-format=Binary
MachineInfo BinaryArch;
// Advanced options
StringRef AddGnuDebugLink;
StringRef SplitDWO;
StringRef SymbolsPrefix;
// Repeated options
std::vector<StringRef> AddSection;
std::vector<StringRef> DumpSection;
std::vector<StringRef> Keep;
std::vector<StringRef> OnlyKeep;
std::vector<StringRef> SymbolsToGlobalize;
std::vector<StringRef> SymbolsToKeep;
std::vector<StringRef> SymbolsToLocalize;
std::vector<StringRef> SymbolsToRemove;
std::vector<StringRef> SymbolsToWeaken;
std::vector<StringRef> ToRemove;
std::vector<std::string> SymbolsToKeepGlobal;
// Map options
StringMap<SectionRename> SectionsToRename;
StringMap<StringRef> SymbolsToRename;
// Boolean options
bool DiscardAll = false;
bool ExtractDWO = false;
bool KeepFileSymbols = false;
bool LocalizeHidden = false;
bool OnlyKeepDebug = false;
bool PreserveDates = false;
bool StripAll = false;
bool StripAllGNU = false;
bool StripDWO = false;
bool StripDebug = false;
bool StripNonAlloc = false;
bool StripSections = false;
bool StripUnneeded = false;
bool Weaken = false;
bool DecompressDebugSections = false;
DebugCompressionType CompressionType = DebugCompressionType::None;
};
// Configuration for the overall invocation of this tool. When invoked as
// objcopy, will always contain exactly one CopyConfig. When invoked as strip,
// will contain one or more CopyConfigs.
struct DriverConfig {
SmallVector<CopyConfig, 1> CopyConfigs;
};
// ParseObjcopyOptions returns the config and sets the input arguments. If a
// help flag is set then ParseObjcopyOptions will print the help messege and
// exit.
DriverConfig parseObjcopyOptions(ArrayRef<const char *> ArgsArr);
// ParseStripOptions returns the config and sets the input arguments. If a
// help flag is set then ParseStripOptions will print the help messege and
// exit.
DriverConfig parseStripOptions(ArrayRef<const char *> ArgsArr);
} // namespace objcopy
} // namespace llvm
#endif

10
tools/llvm-objcopy/Object.h
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@ -10,6 +10,7 @@
#ifndef LLVM_TOOLS_OBJCOPY_OBJECT_H
#define LLVM_TOOLS_OBJCOPY_OBJECT_H
#include "CopyConfig.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
@ -67,15 +68,6 @@ public:
enum ElfType { ELFT_ELF32LE, ELFT_ELF64LE, ELFT_ELF32BE, ELFT_ELF64BE };
// This type keeps track of the machine info for various architectures. This
// lets us map architecture names to ELF types and the e_machine value of the
// ELF file.
struct MachineInfo {
uint16_t EMachine;
bool Is64Bit;
bool IsLittleEndian;
};
class SectionVisitor {
public:
virtual ~SectionVisitor();

464
tools/llvm-objcopy/llvm-objcopy.cpp
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@ -8,8 +8,9 @@
//===----------------------------------------------------------------------===//
#include "llvm-objcopy.h"
#include "CopyConfig.h"
#include "Object.h"
#include "llvm/ADT/BitmaskEnum.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
@ -56,160 +57,8 @@ using namespace llvm::objcopy;
using namespace object;
using namespace ELF;
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, true) {}
};
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, true) {}
};
struct SectionRename {
StringRef OriginalName;
StringRef NewName;
Optional<uint64_t> NewFlags;
};
// Configuration for copying/stripping a single file.
struct CopyConfig {
// Main input/output options
StringRef InputFilename;
StringRef InputFormat;
StringRef OutputFilename;
StringRef OutputFormat;
// Only applicable for --input-format=Binary
MachineInfo BinaryArch;
// Advanced options
StringRef AddGnuDebugLink;
StringRef SplitDWO;
StringRef SymbolsPrefix;
// Repeated options
std::vector<StringRef> AddSection;
std::vector<StringRef> DumpSection;
std::vector<StringRef> Keep;
std::vector<StringRef> OnlyKeep;
std::vector<StringRef> SymbolsToGlobalize;
std::vector<StringRef> SymbolsToKeep;
std::vector<StringRef> SymbolsToLocalize;
std::vector<StringRef> SymbolsToRemove;
std::vector<StringRef> SymbolsToWeaken;
std::vector<StringRef> ToRemove;
std::vector<std::string> SymbolsToKeepGlobal;
// Map options
StringMap<SectionRename> SectionsToRename;
StringMap<StringRef> SymbolsToRename;
// Boolean options
bool DiscardAll = false;
bool ExtractDWO = false;
bool KeepFileSymbols = false;
bool LocalizeHidden = false;
bool OnlyKeepDebug = false;
bool PreserveDates = false;
bool StripAll = false;
bool StripAllGNU = false;
bool StripDWO = false;
bool StripDebug = false;
bool StripNonAlloc = false;
bool StripSections = false;
bool StripUnneeded = false;
bool Weaken = false;
bool DecompressDebugSections = false;
DebugCompressionType CompressionType = DebugCompressionType::None;
};
// Configuration for the overall invocation of this tool. When invoked as
// objcopy, will always contain exactly one CopyConfig. When invoked as strip,
// will contain one or more CopyConfigs.
struct DriverConfig {
SmallVector<CopyConfig, 1> CopyConfigs;
};
using SectionPred = std::function<bool(const SectionBase &Sec)>;
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
namespace llvm {
namespace objcopy {
@ -242,65 +91,6 @@ LLVM_ATTRIBUTE_NORETURN void reportError(StringRef File, Error E) {
} // end namespace objcopy
} // end namespace llvm
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 SectionRename parseRenameSectionValue(StringRef FlagValue) {
if (!FlagValue.contains('='))
error("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) {
SectionFlag Flags = SectionFlag::SecNone;
for (size_t I = 1, Size = NameAndFlags.size(); I < Size; ++I) {
SectionFlag Flag = parseSectionRenameFlag(NameAndFlags[I]);
if (Flag == SectionFlag::SecNone)
error("Unrecognized section flag '" + NameAndFlags[I] +
"'. Flags supported for GNU compatibility: alloc, load, noload, "
"readonly, debug, code, data, rom, share, contents, merge, "
"strings.");
Flags |= Flag;
}
SR.NewFlags = 0;
if (Flags & SectionFlag::SecAlloc)
*SR.NewFlags |= ELF::SHF_ALLOC;
if (!(Flags & SectionFlag::SecReadonly))
*SR.NewFlags |= ELF::SHF_WRITE;
if (Flags & SectionFlag::SecCode)
*SR.NewFlags |= ELF::SHF_EXECINSTR;
if (Flags & SectionFlag::SecMerge)
*SR.NewFlags |= ELF::SHF_MERGE;
if (Flags & SectionFlag::SecStrings)
*SR.NewFlags |= ELF::SHF_STRINGS;
}
return SR;
}
static bool isDebugSection(const SectionBase &Sec) {
return StringRef(Sec.Name).startswith(".debug") ||
StringRef(Sec.Name).startswith(".zdebug") || Sec.Name == ".gdb_index";
@ -319,24 +109,6 @@ static bool onlyKeepDWOPred(const Object &Obj, const SectionBase &Sec) {
return !isDWOSection(Sec);
}
static const StringMap<MachineInfo> ArchMap{
// Name, {EMachine, 64bit, LittleEndian}
{"aarch64", {EM_AARCH64, true, true}},
{"arm", {EM_ARM, false, true}},
{"i386", {EM_386, false, true}},
{"i386:x86-64", {EM_X86_64, true, true}},
{"powerpc:common64", {EM_PPC64, true, true}},
{"sparc", {EM_SPARC, false, true}},
{"x86-64", {EM_X86_64, true, true}},
};
static const MachineInfo &getMachineInfo(StringRef Arch) {
auto Iter = ArchMap.find(Arch);
if (Iter == std::end(ArchMap))
error("Invalid architecture: '" + Arch + "'");
return Iter->getValue();
}
static ElfType getOutputElfType(const Binary &Bin) {
// Infer output ELF type from the input ELF object
if (isa<ELFObjectFile<ELF32LE>>(Bin))
@ -870,238 +642,6 @@ static void executeElfObjcopy(const CopyConfig &Config) {
}
}
static void addGlobalSymbolsFromFile(std::vector<std::string> &Symbols,
StringRef Filename) {
SmallVector<StringRef, 16> Lines;
auto BufOrErr = MemoryBuffer::getFile(Filename);
if (!BufOrErr)
reportError(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.push_back(TrimmedLine.str());
}
}
// ParseObjcopyOptions returns the config and sets the input arguments. If a
// help flag is set then ParseObjcopyOptions will print the help messege and
// exit.
static DriverConfig parseObjcopyOptions(ArrayRef<const char *> ArgsArr) {
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)) {
cl::PrintVersionMessage();
exit(0);
}
SmallVector<const char *, 2> Positional;
for (auto Arg : InputArgs.filtered(OBJCOPY_UNKNOWN))
error("unknown argument '" + Arg->getAsString(InputArgs) + "'");
for (auto Arg : InputArgs.filtered(OBJCOPY_INPUT))
Positional.push_back(Arg->getValue());
if (Positional.empty())
error("No input file specified");
if (Positional.size() > 2)
error("Too many positional arguments");
CopyConfig Config;
Config.InputFilename = Positional[0];
Config.OutputFilename = Positional[Positional.size() == 1 ? 0 : 1];
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())
error("Specified binary input without specifiying an architecture");
Config.BinaryArch = getMachineInfo(BinaryArch);
}
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)
error("Invalid or unsupported --compress-debug-sections format: " +
InputArgs.getLastArgValue(OBJCOPY_compress_debug_sections_eq));
if (!zlib::isAvailable())
error("LLVM was not compiled with LLVM_ENABLE_ZLIB: can not compress.");
}
}
Config.SplitDWO = InputArgs.getLastArgValue(OBJCOPY_split_dwo);
Config.AddGnuDebugLink = InputArgs.getLastArgValue(OBJCOPY_add_gnu_debuglink);
Config.SymbolsPrefix = InputArgs.getLastArgValue(OBJCOPY_prefix_symbols);
for (auto Arg : InputArgs.filtered(OBJCOPY_redefine_symbol)) {
if (!StringRef(Arg->getValue()).contains('='))
error("Bad format for --redefine-sym");
auto Old2New = StringRef(Arg->getValue()).split('=');
if (!Config.SymbolsToRename.insert(Old2New).second)
error("Multiple redefinition of symbol " + Old2New.first);
}
for (auto Arg : InputArgs.filtered(OBJCOPY_rename_section)) {
SectionRename SR = parseRenameSectionValue(StringRef(Arg->getValue()));
if (!Config.SectionsToRename.try_emplace(SR.OriginalName, SR).second)
error("Multiple renames of section " + SR.OriginalName);
}
for (auto Arg : InputArgs.filtered(OBJCOPY_remove_section))
Config.ToRemove.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_keep))
Config.Keep.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_only_keep))
Config.OnlyKeep.push_back(Arg->getValue());
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);
Config.DiscardAll = InputArgs.hasArg(OBJCOPY_discard_all);
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.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_global_symbol))
Config.SymbolsToKeepGlobal.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_global_symbols))
addGlobalSymbolsFromFile(Config.SymbolsToKeepGlobal, Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_globalize_symbol))
Config.SymbolsToGlobalize.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_weaken_symbol))
Config.SymbolsToWeaken.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_strip_symbol))
Config.SymbolsToRemove.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(OBJCOPY_keep_symbol))
Config.SymbolsToKeep.push_back(Arg->getValue());
Config.PreserveDates = InputArgs.hasArg(OBJCOPY_preserve_dates);
DriverConfig DC;
DC.CopyConfigs.push_back(std::move(Config));
if (Config.DecompressDebugSections &&
Config.CompressionType != DebugCompressionType::None) {
error("Cannot specify --compress-debug-sections at the same time as "
"--decompress-debug-sections at the same time");
}
if (Config.DecompressDebugSections && !zlib::isAvailable())
error("LLVM was not compiled with LLVM_ENABLE_ZLIB: cannot decompress.");
return 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.
static DriverConfig parseStripOptions(ArrayRef<const char *> ArgsArr) {
StripOptTable T;
unsigned MissingArgumentIndex, MissingArgumentCount;
llvm::opt::InputArgList InputArgs =
T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
static const char Usage[] = "llvm-strip [options] file...";
if (InputArgs.size() == 0) {
T.PrintHelp(errs(), Usage, "strip tool");
exit(1);
}
if (InputArgs.hasArg(STRIP_help)) {
T.PrintHelp(outs(), Usage, "strip tool");
exit(0);
}
if (InputArgs.hasArg(STRIP_version)) {
cl::PrintVersionMessage();
exit(0);
}
SmallVector<const char *, 2> Positional;
for (auto Arg : InputArgs.filtered(STRIP_UNKNOWN))
error("unknown argument '" + Arg->getAsString(InputArgs) + "'");
for (auto Arg : InputArgs.filtered(STRIP_INPUT))
Positional.push_back(Arg->getValue());
if (Positional.empty())
error("No input file specified");
if (Positional.size() > 1 && InputArgs.hasArg(STRIP_output))
error("Multiple input files cannot be used in combination with -o");
CopyConfig Config;
Config.StripDebug = InputArgs.hasArg(STRIP_strip_debug);
Config.DiscardAll = InputArgs.hasArg(STRIP_discard_all);
Config.StripUnneeded = InputArgs.hasArg(STRIP_strip_unneeded);
Config.StripAll = InputArgs.hasArg(STRIP_strip_all);
if (!Config.StripDebug && !Config.StripUnneeded && !Config.DiscardAll)
Config.StripAll = true;
for (auto Arg : InputArgs.filtered(STRIP_remove_section))
Config.ToRemove.push_back(Arg->getValue());
for (auto Arg : InputArgs.filtered(STRIP_keep_symbol))
Config.SymbolsToKeep.push_back(Arg->getValue());
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 DC;
}
int main(int argc, char **argv) {
InitLLVM X(argc, argv);
ToolName = argv[0];