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