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-rw-r--r--llvm/tools/llvm-objcopy/llvm-objcopy.cpp283
1 files changed, 108 insertions, 175 deletions
diff --git a/llvm/tools/llvm-objcopy/llvm-objcopy.cpp b/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
index cb0aaf0817d..7d230390872 100644
--- a/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
+++ b/llvm/tools/llvm-objcopy/llvm-objcopy.cpp
@@ -17,9 +17,6 @@
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Object/ELFTypes.h"
#include "llvm/Object/Error.h"
-#include "llvm/Option/Arg.h"
-#include "llvm/Option/ArgList.h"
-#include "llvm/Option/Option.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
@@ -45,39 +42,6 @@ using namespace llvm;
using namespace object;
using namespace ELF;
-namespace {
-
-enum ID {
- 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 "Opts.inc"
-#undef OPTION
-};
-
-#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
-#include "Opts.inc"
-#undef PREFIX
-
-static constexpr opt::OptTable::Info ObjcopyInfoTable[] = {
-#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
- HELPTEXT, METAVAR, VALUES) \
- {PREFIX, NAME, HELPTEXT, \
- METAVAR, OBJCOPY_##ID, opt::Option::KIND##Class, \
- PARAM, FLAGS, OBJCOPY_##GROUP, \
- OBJCOPY_##ALIAS, ALIASARGS, VALUES},
-#include "Opts.inc"
-#undef OPTION
-};
-
-class ObjcopyOptTable : public opt::OptTable {
-public:
- ObjcopyOptTable() : OptTable(ObjcopyInfoTable, true) {}
-};
-
-} // namespace
-
// The name this program was invoked as.
static StringRef ToolName;
@@ -107,28 +71,60 @@ LLVM_ATTRIBUTE_NORETURN void reportError(StringRef File, Error E) {
} // end namespace llvm
-struct CopyConfig {
- StringRef OutputFilename;
- StringRef InputFilename;
- StringRef OutputFormat;
- StringRef InputFormat;
- StringRef BinaryArch;
-
- StringRef SplitDWO;
- StringRef AddGnuDebugLink;
- std::vector<StringRef> ToRemove;
- std::vector<StringRef> Keep;
- std::vector<StringRef> OnlyKeep;
- std::vector<StringRef> AddSection;
- bool StripAll;
- bool StripAllGNU;
- bool StripDebug;
- bool StripSections;
- bool StripNonAlloc;
- bool StripDWO;
- bool ExtractDWO;
- bool LocalizeHidden;
-};
+static cl::opt<std::string> InputFilename(cl::Positional, cl::desc("<input>"));
+static cl::opt<std::string> OutputFilename(cl::Positional, cl::desc("[ <output> ]"));
+
+static cl::opt<std::string>
+ OutputFormat("O", cl::desc("Set output format to one of the following:"
+ "\n\tbinary"));
+static cl::list<std::string> ToRemove("remove-section",
+ cl::desc("Remove <section>"),
+ cl::value_desc("section"));
+static cl::alias ToRemoveA("R", cl::desc("Alias for remove-section"),
+ cl::aliasopt(ToRemove));
+static cl::opt<bool> StripAll(
+ "strip-all",
+ cl::desc(
+ "Removes non-allocated sections other than .gnu.warning* sections"));
+static cl::opt<bool>
+ StripAllGNU("strip-all-gnu",
+ cl::desc("Removes symbol, relocation, and debug information"));
+static cl::list<std::string> Keep("keep", cl::desc("Keep <section>"),
+ cl::value_desc("section"));
+static cl::list<std::string> OnlyKeep("only-keep",
+ cl::desc("Remove all but <section>"),
+ cl::value_desc("section"));
+static cl::alias OnlyKeepA("j", cl::desc("Alias for only-keep"),
+ cl::aliasopt(OnlyKeep));
+static cl::opt<bool> StripDebug("strip-debug",
+ cl::desc("Removes all debug information"));
+static cl::opt<bool> StripSections("strip-sections",
+ cl::desc("Remove all section headers"));
+static cl::opt<bool>
+ StripNonAlloc("strip-non-alloc",
+ cl::desc("Remove all non-allocated sections"));
+static cl::opt<bool>
+ StripDWO("strip-dwo", cl::desc("Remove all DWARF .dwo sections from file"));
+static cl::opt<bool> ExtractDWO(
+ "extract-dwo",
+ cl::desc("Remove all sections that are not DWARF .dwo sections from file"));
+static cl::opt<std::string>
+ SplitDWO("split-dwo",
+ cl::desc("Equivalent to extract-dwo on the input file to "
+ "<dwo-file>, then strip-dwo on the input file"),
+ cl::value_desc("dwo-file"));
+static cl::list<std::string> AddSection(
+ "add-section",
+ cl::desc("Make a section named <section> with the contents of <file>."),
+ cl::value_desc("section=file"));
+static cl::opt<bool> LocalizeHidden(
+ "localize-hidden",
+ cl::desc(
+ "Mark all symbols that have hidden or internal visibility as local"));
+static cl::opt<std::string>
+ AddGnuDebugLink("add-gnu-debuglink",
+ cl::desc("adds a .gnu_debuglink for <debug-file>"),
+ cl::value_desc("debug-file"));
using SectionPred = std::function<bool(const SectionBase &Sec)>;
@@ -143,35 +139,31 @@ bool OnlyKeepDWOPred(const Object &Obj, const SectionBase &Sec) {
return !IsDWOSection(Sec);
}
-std::unique_ptr<Writer> CreateWriter(const CopyConfig &Config, Object &Obj,
- StringRef File, ElfType OutputElfType) {
- if (Config.OutputFormat == "binary") {
- return llvm::make_unique<BinaryWriter>(File, Obj);
+static ElfType OutputElfType;
+
+std::unique_ptr<Writer> CreateWriter(Object &Obj, StringRef File) {
+ if (OutputFormat == "binary") {
+ return llvm::make_unique<BinaryWriter>(OutputFilename, Obj);
}
// Depending on the initial ELFT and OutputFormat we need a different Writer.
switch (OutputElfType) {
case ELFT_ELF32LE:
- return llvm::make_unique<ELFWriter<ELF32LE>>(File, Obj,
- !Config.StripSections);
+ return llvm::make_unique<ELFWriter<ELF32LE>>(File, Obj, !StripSections);
case ELFT_ELF64LE:
- return llvm::make_unique<ELFWriter<ELF64LE>>(File, Obj,
- !Config.StripSections);
+ return llvm::make_unique<ELFWriter<ELF64LE>>(File, Obj, !StripSections);
case ELFT_ELF32BE:
- return llvm::make_unique<ELFWriter<ELF32BE>>(File, Obj,
- !Config.StripSections);
+ return llvm::make_unique<ELFWriter<ELF32BE>>(File, Obj, !StripSections);
case ELFT_ELF64BE:
- return llvm::make_unique<ELFWriter<ELF64BE>>(File, Obj,
- !Config.StripSections);
+ return llvm::make_unique<ELFWriter<ELF64BE>>(File, Obj, !StripSections);
}
llvm_unreachable("Invalid output format");
}
-void SplitDWOToFile(const CopyConfig &Config, const Reader &Reader,
- StringRef File, ElfType OutputElfType) {
+void SplitDWOToFile(const Reader &Reader, StringRef File) {
auto DWOFile = Reader.create();
DWOFile->removeSections(
[&](const SectionBase &Sec) { return OnlyKeepDWOPred(*DWOFile, Sec); });
- auto Writer = CreateWriter(Config, *DWOFile, File, OutputElfType);
+ auto Writer = CreateWriter(*DWOFile, File);
Writer->finalize();
Writer->write();
}
@@ -183,16 +175,15 @@ void SplitDWOToFile(const CopyConfig &Config, const Reader &Reader,
// any previous removals. Lastly whether or not something is removed shouldn't
// depend a) on the order the options occur in or b) on some opaque priority
// system. The only priority is that keeps/copies overrule removes.
-void HandleArgs(const CopyConfig &Config, Object &Obj, const Reader &Reader,
- ElfType OutputElfType) {
+void HandleArgs(Object &Obj, const Reader &Reader) {
- if (!Config.SplitDWO.empty()) {
- SplitDWOToFile(Config, Reader, Config.SplitDWO, OutputElfType);
+ if (!SplitDWO.empty()) {
+ SplitDWOToFile(Reader, SplitDWO);
}
// Localize:
- if (Config.LocalizeHidden) {
+ if (LocalizeHidden) {
Obj.SymbolTable->localize([](const Symbol &Sym) {
return Sym.Visibility == STV_HIDDEN || Sym.Visibility == STV_INTERNAL;
});
@@ -202,24 +193,24 @@ void HandleArgs(const CopyConfig &Config, Object &Obj, const Reader &Reader,
// Removes:
- if (!Config.ToRemove.empty()) {
- RemovePred = [&Config](const SectionBase &Sec) {
- return std::find(std::begin(Config.ToRemove), std::end(Config.ToRemove),
- Sec.Name) != std::end(Config.ToRemove);
+ if (!ToRemove.empty()) {
+ RemovePred = [&](const SectionBase &Sec) {
+ return std::find(std::begin(ToRemove), std::end(ToRemove), Sec.Name) !=
+ std::end(ToRemove);
};
}
- if (Config.StripDWO || !Config.SplitDWO.empty())
+ if (StripDWO || !SplitDWO.empty())
RemovePred = [RemovePred](const SectionBase &Sec) {
return IsDWOSection(Sec) || RemovePred(Sec);
};
- if (Config.ExtractDWO)
+ if (ExtractDWO)
RemovePred = [RemovePred, &Obj](const SectionBase &Sec) {
return OnlyKeepDWOPred(Obj, Sec) || RemovePred(Sec);
};
- if (Config.StripAllGNU)
+ if (StripAllGNU)
RemovePred = [RemovePred, &Obj](const SectionBase &Sec) {
if (RemovePred(Sec))
return true;
@@ -237,19 +228,19 @@ void HandleArgs(const CopyConfig &Config, Object &Obj, const Reader &Reader,
return Sec.Name.startswith(".debug");
};
- if (Config.StripSections) {
+ if (StripSections) {
RemovePred = [RemovePred](const SectionBase &Sec) {
return RemovePred(Sec) || (Sec.Flags & SHF_ALLOC) == 0;
};
}
- if (Config.StripDebug) {
+ if (StripDebug) {
RemovePred = [RemovePred](const SectionBase &Sec) {
return RemovePred(Sec) || Sec.Name.startswith(".debug");
};
}
- if (Config.StripNonAlloc)
+ if (StripNonAlloc)
RemovePred = [RemovePred, &Obj](const SectionBase &Sec) {
if (RemovePred(Sec))
return true;
@@ -258,7 +249,7 @@ void HandleArgs(const CopyConfig &Config, Object &Obj, const Reader &Reader,
return (Sec.Flags & SHF_ALLOC) == 0;
};
- if (Config.StripAll)
+ if (StripAll)
RemovePred = [RemovePred, &Obj](const SectionBase &Sec) {
if (RemovePred(Sec))
return true;
@@ -271,11 +262,11 @@ void HandleArgs(const CopyConfig &Config, Object &Obj, const Reader &Reader,
// Explicit copies:
- if (!Config.OnlyKeep.empty()) {
- RemovePred = [&Config, RemovePred, &Obj](const SectionBase &Sec) {
+ if (!OnlyKeep.empty()) {
+ RemovePred = [RemovePred, &Obj](const SectionBase &Sec) {
// Explicitly keep these sections regardless of previous removes.
- if (std::find(std::begin(Config.OnlyKeep), std::end(Config.OnlyKeep),
- Sec.Name) != std::end(Config.OnlyKeep))
+ if (std::find(std::begin(OnlyKeep), std::end(OnlyKeep), Sec.Name) !=
+ std::end(OnlyKeep))
return false;
// Allow all implicit removes.
@@ -293,11 +284,11 @@ void HandleArgs(const CopyConfig &Config, Object &Obj, const Reader &Reader,
};
}
- if (!Config.Keep.empty()) {
- RemovePred = [Config, RemovePred](const SectionBase &Sec) {
+ if (!Keep.empty()) {
+ RemovePred = [RemovePred](const SectionBase &Sec) {
// Explicitly keep these sections regardless of previous removes.
- if (std::find(std::begin(Config.Keep), std::end(Config.Keep), Sec.Name) !=
- std::end(Config.Keep))
+ if (std::find(std::begin(Keep), std::end(Keep), Sec.Name) !=
+ std::end(Keep))
return false;
// Otherwise defer to RemovePred.
return RemovePred(Sec);
@@ -306,9 +297,9 @@ void HandleArgs(const CopyConfig &Config, Object &Obj, const Reader &Reader,
Obj.removeSections(RemovePred);
- if (!Config.AddSection.empty()) {
- for (const auto &Flag : Config.AddSection) {
- auto SecPair = Flag.split("=");
+ if (!AddSection.empty()) {
+ for (const auto &Flag : AddSection) {
+ auto SecPair = StringRef(Flag).split("=");
auto SecName = SecPair.first;
auto File = SecPair.second;
auto BufOrErr = MemoryBuffer::getFile(File);
@@ -322,95 +313,37 @@ void HandleArgs(const CopyConfig &Config, Object &Obj, const Reader &Reader,
}
}
- if (!Config.AddGnuDebugLink.empty()) {
- Obj.addSection<GnuDebugLinkSection>(Config.AddGnuDebugLink);
+ if (!AddGnuDebugLink.empty()) {
+ Obj.addSection<GnuDebugLinkSection>(StringRef(AddGnuDebugLink));
}
}
-std::unique_ptr<Reader> CreateReader(StringRef InputFilename,
- ElfType &OutputElfType) {
+std::unique_ptr<Reader> CreateReader() {
// Right now we can only read ELF files so there's only one reader;
- auto Out = llvm::make_unique<ELFReader>(InputFilename);
+ auto Out = llvm::make_unique<ELFReader>(StringRef(InputFilename));
// We need to set the default ElfType for output.
OutputElfType = Out->getElfType();
return std::move(Out);
}
-void ExecuteElfObjcopy(const CopyConfig &Config) {
- ElfType OutputElfType;
- auto Reader = CreateReader(Config.InputFilename, OutputElfType);
- auto Obj = Reader->create();
- auto Writer =
- CreateWriter(Config, *Obj, Config.OutputFilename, OutputElfType);
- HandleArgs(Config, *Obj, *Reader, OutputElfType);
- Writer->finalize();
- Writer->write();
-}
-
-// ParseObjcopyOptions returns the config and sets the input arguments. If a
-// help flag is set then ParseObjcopyOptions will print the help messege and
-// exit.
-CopyConfig ParseObjcopyOptions(ArrayRef<const char *> ArgsArr) {
- ObjcopyOptTable T;
- unsigned MissingArgumentIndex, MissingArgumentCount;
- llvm::opt::InputArgList InputArgs =
- T.ParseArgs(ArgsArr, MissingArgumentIndex, MissingArgumentCount);
-
- if (InputArgs.size() == 0 || InputArgs.hasArg(OBJCOPY_help)) {
- T.PrintHelp(outs(), "llvm-objcopy <input> [ <output> ]", "objcopy tool");
- 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);
- Config.BinaryArch = InputArgs.getLastArgValue(OBJCOPY_binary_architecture);
-
- Config.SplitDWO = InputArgs.getLastArgValue(OBJCOPY_split_dwo);
- Config.AddGnuDebugLink = InputArgs.getLastArgValue(OBJCOPY_add_gnu_debuglink);
- 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());
- 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.ExtractDWO = InputArgs.hasArg(OBJCOPY_extract_dwo);
- Config.LocalizeHidden = InputArgs.hasArg(OBJCOPY_localize_hidden);
-
- return Config;
-}
-
int main(int argc, char **argv) {
// Print a stack trace if we signal out.
sys::PrintStackTraceOnErrorSignal(argv[0]);
PrettyStackTraceProgram X(argc, argv);
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, "llvm objcopy utility\n");
ToolName = argv[0];
+ if (InputFilename.empty()) {
+ cl::PrintHelpMessage();
+ return 2;
+ }
- CopyConfig Config = ParseObjcopyOptions(makeArrayRef(argv + 1, argc));
- ExecuteElfObjcopy(Config);
+ auto Reader = CreateReader();
+ auto Obj = Reader->create();
+ StringRef Output =
+ OutputFilename.getNumOccurrences() ? OutputFilename : InputFilename;
+ auto Writer = CreateWriter(*Obj, Output);
+ HandleArgs(*Obj, *Reader);
+ Writer->finalize();
+ Writer->write();
}
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