513 lines
17 KiB
C++
513 lines
17 KiB
C++
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//===- llvm-ifs.cpp -------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===-----------------------------------------------------------------------===/
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/ObjectYAML/yaml2obj.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Errc.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/FileOutputBuffer.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/VersionTuple.h"
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#include "llvm/Support/WithColor.h"
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#include "llvm/Support/YAMLTraits.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/TextAPI/MachO/InterfaceFile.h"
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#include "llvm/TextAPI/MachO/TextAPIReader.h"
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#include "llvm/TextAPI/MachO/TextAPIWriter.h"
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#include <set>
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#include <string>
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#include <vector>
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using namespace llvm;
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using namespace llvm::yaml;
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using namespace llvm::MachO;
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#define DEBUG_TYPE "llvm-ifs"
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namespace {
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const VersionTuple IFSVersionCurrent(2, 0);
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} // end anonymous namespace
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static cl::opt<std::string> Action("action", cl::desc("<llvm-ifs action>"),
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cl::value_desc("write-ifs | write-bin"),
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cl::init("write-ifs"));
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static cl::opt<std::string> ForceFormat("force-format",
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cl::desc("<force object format>"),
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cl::value_desc("ELF | TBD"),
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cl::init(""));
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static cl::list<std::string> InputFilenames(cl::Positional,
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cl::desc("<input ifs files>"),
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cl::ZeroOrMore);
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static cl::opt<std::string> OutputFilename("o", cl::desc("<output file>"),
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cl::value_desc("path"));
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enum class IFSSymbolType {
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NoType = 0,
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Object,
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Func,
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// Type information is 4 bits, so 16 is safely out of range.
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Unknown = 16,
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};
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static std::string getTypeName(IFSSymbolType Type) {
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switch (Type) {
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case IFSSymbolType::NoType:
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return "NoType";
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case IFSSymbolType::Func:
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return "Func";
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case IFSSymbolType::Object:
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return "Object";
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case IFSSymbolType::Unknown:
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return "Unknown";
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}
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llvm_unreachable("Unexpected ifs symbol type.");
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}
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struct IFSSymbol {
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IFSSymbol() = default;
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IFSSymbol(std::string SymbolName) : Name(SymbolName) {}
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std::string Name;
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uint64_t Size;
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IFSSymbolType Type;
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bool Weak;
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Optional<std::string> Warning;
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bool operator<(const IFSSymbol &RHS) const { return Name < RHS.Name; }
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};
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LLVM_YAML_IS_SEQUENCE_VECTOR(IFSSymbol)
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namespace llvm {
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namespace yaml {
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/// YAML traits for IFSSymbolType.
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template <> struct ScalarEnumerationTraits<IFSSymbolType> {
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static void enumeration(IO &IO, IFSSymbolType &SymbolType) {
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IO.enumCase(SymbolType, "NoType", IFSSymbolType::NoType);
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IO.enumCase(SymbolType, "Func", IFSSymbolType::Func);
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IO.enumCase(SymbolType, "Object", IFSSymbolType::Object);
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IO.enumCase(SymbolType, "Unknown", IFSSymbolType::Unknown);
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// Treat other symbol types as noise, and map to Unknown.
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if (!IO.outputting() && IO.matchEnumFallback())
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SymbolType = IFSSymbolType::Unknown;
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}
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};
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/// YAML traits for IFSSymbol.
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template <> struct MappingTraits<IFSSymbol> {
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static void mapping(IO &IO, IFSSymbol &Symbol) {
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IO.mapRequired("Name", Symbol.Name);
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IO.mapRequired("Type", Symbol.Type);
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// The need for symbol size depends on the symbol type.
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if (Symbol.Type == IFSSymbolType::NoType)
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IO.mapOptional("Size", Symbol.Size, (uint64_t)0);
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else if (Symbol.Type == IFSSymbolType::Func)
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Symbol.Size = 0;
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else
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IO.mapRequired("Size", Symbol.Size);
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IO.mapOptional("Weak", Symbol.Weak, false);
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IO.mapOptional("Warning", Symbol.Warning);
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}
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// Compacts symbol information into a single line.
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static const bool flow = true;
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};
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} // namespace yaml
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} // namespace llvm
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// A cumulative representation of ELF stubs.
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// Both textual and binary stubs will read into and write from this object.
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class IFSStub {
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// TODO: Add support for symbol versioning.
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public:
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VersionTuple IfsVersion;
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std::string Triple;
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std::string ObjectFileFormat;
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Optional<std::string> SOName;
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std::vector<std::string> NeededLibs;
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std::vector<IFSSymbol> Symbols;
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IFSStub() = default;
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IFSStub(const IFSStub &Stub)
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: IfsVersion(Stub.IfsVersion), Triple(Stub.Triple),
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ObjectFileFormat(Stub.ObjectFileFormat), SOName(Stub.SOName),
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NeededLibs(Stub.NeededLibs), Symbols(Stub.Symbols) {}
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IFSStub(IFSStub &&Stub)
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: IfsVersion(std::move(Stub.IfsVersion)), Triple(std::move(Stub.Triple)),
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ObjectFileFormat(std::move(Stub.ObjectFileFormat)),
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SOName(std::move(Stub.SOName)), NeededLibs(std::move(Stub.NeededLibs)),
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Symbols(std::move(Stub.Symbols)) {}
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};
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namespace llvm {
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namespace yaml {
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/// YAML traits for IFSStub objects.
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template <> struct MappingTraits<IFSStub> {
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static void mapping(IO &IO, IFSStub &Stub) {
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if (!IO.mapTag("!experimental-ifs-v2", true))
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IO.setError("Not a .ifs YAML file.");
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auto OldContext = IO.getContext();
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IO.setContext(&Stub);
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IO.mapRequired("IfsVersion", Stub.IfsVersion);
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IO.mapOptional("Triple", Stub.Triple);
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IO.mapOptional("ObjectFileFormat", Stub.ObjectFileFormat);
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IO.mapOptional("SOName", Stub.SOName);
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IO.mapOptional("NeededLibs", Stub.NeededLibs);
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IO.mapRequired("Symbols", Stub.Symbols);
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IO.setContext(&OldContext);
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}
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};
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} // namespace yaml
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} // namespace llvm
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static Expected<std::unique_ptr<IFSStub>> readInputFile(StringRef FilePath) {
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// Read in file.
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ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrError =
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MemoryBuffer::getFileOrSTDIN(FilePath);
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if (!BufOrError)
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return createStringError(BufOrError.getError(), "Could not open `%s`",
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FilePath.data());
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std::unique_ptr<MemoryBuffer> FileReadBuffer = std::move(*BufOrError);
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yaml::Input YamlIn(FileReadBuffer->getBuffer());
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std::unique_ptr<IFSStub> Stub(new IFSStub());
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YamlIn >> *Stub;
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if (std::error_code Err = YamlIn.error())
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return createStringError(Err, "Failed reading Interface Stub File.");
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if (Stub->IfsVersion > IFSVersionCurrent)
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return make_error<StringError>(
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"IFS version " + Stub->IfsVersion.getAsString() + " is unsupported.",
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std::make_error_code(std::errc::invalid_argument));
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return std::move(Stub);
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}
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static int writeTbdStub(const Triple &T, const std::vector<IFSSymbol> &Symbols,
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const StringRef Format, raw_ostream &Out) {
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auto PlatformKindOrError =
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[](const llvm::Triple &T) -> llvm::Expected<llvm::MachO::PlatformKind> {
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if (T.isMacOSX())
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return llvm::MachO::PlatformKind::macOS;
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if (T.isTvOS())
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return llvm::MachO::PlatformKind::tvOS;
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if (T.isWatchOS())
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return llvm::MachO::PlatformKind::watchOS;
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// Note: put isiOS last because tvOS and watchOS are also iOS according
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// to the Triple.
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if (T.isiOS())
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return llvm::MachO::PlatformKind::iOS;
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// TODO: Add an option for ForceTriple, but keep ForceFormat for now.
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if (ForceFormat == "TBD")
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return llvm::MachO::PlatformKind::macOS;
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return createStringError(errc::not_supported, "Invalid Platform.\n");
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}(T);
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if (!PlatformKindOrError)
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return -1;
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PlatformKind Plat = PlatformKindOrError.get();
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TargetList Targets({Target(llvm::MachO::mapToArchitecture(T), Plat)});
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InterfaceFile File;
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File.setFileType(FileType::TBD_V3); // Only supporting v3 for now.
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File.addTargets(Targets);
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for (const auto &Symbol : Symbols) {
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auto Name = Symbol.Name;
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auto Kind = SymbolKind::GlobalSymbol;
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switch (Symbol.Type) {
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default:
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case IFSSymbolType::NoType:
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Kind = SymbolKind::GlobalSymbol;
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break;
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case IFSSymbolType::Object:
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Kind = SymbolKind::GlobalSymbol;
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break;
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case IFSSymbolType::Func:
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Kind = SymbolKind::GlobalSymbol;
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break;
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}
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if (Symbol.Weak)
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File.addSymbol(Kind, Name, Targets, SymbolFlags::WeakDefined);
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else
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File.addSymbol(Kind, Name, Targets);
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}
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SmallString<4096> Buffer;
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raw_svector_ostream OS(Buffer);
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if (Error Result = TextAPIWriter::writeToStream(OS, File))
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return -1;
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Out << OS.str();
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return 0;
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}
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static int writeElfStub(const Triple &T, const std::vector<IFSSymbol> &Symbols,
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const StringRef Format, raw_ostream &Out) {
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SmallString<0> Storage;
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Storage.clear();
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raw_svector_ostream OS(Storage);
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OS << "--- !ELF\n";
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OS << "FileHeader:\n";
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OS << " Class: ELFCLASS";
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OS << (T.isArch64Bit() ? "64" : "32");
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OS << "\n";
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OS << " Data: ELFDATA2";
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OS << (T.isLittleEndian() ? "LSB" : "MSB");
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OS << "\n";
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OS << " Type: ET_DYN\n";
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OS << " Machine: "
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<< llvm::StringSwitch<llvm::StringRef>(T.getArchName())
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.Case("x86_64", "EM_X86_64")
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.Case("i386", "EM_386")
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.Case("i686", "EM_386")
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.Case("aarch64", "EM_AARCH64")
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.Case("amdgcn", "EM_AMDGPU")
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.Case("r600", "EM_AMDGPU")
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.Case("arm", "EM_ARM")
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.Case("thumb", "EM_ARM")
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.Case("avr", "EM_AVR")
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.Case("mips", "EM_MIPS")
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.Case("mipsel", "EM_MIPS")
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.Case("mips64", "EM_MIPS")
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.Case("mips64el", "EM_MIPS")
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.Case("msp430", "EM_MSP430")
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.Case("ppc", "EM_PPC")
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.Case("ppc64", "EM_PPC64")
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.Case("ppc64le", "EM_PPC64")
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.Case("x86", T.isOSIAMCU() ? "EM_IAMCU" : "EM_386")
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.Case("x86_64", "EM_X86_64")
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.Default("EM_NONE")
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<< "\nSections:"
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<< "\n - Name: .text"
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<< "\n Type: SHT_PROGBITS"
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<< "\n - Name: .data"
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<< "\n Type: SHT_PROGBITS"
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<< "\n - Name: .rodata"
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<< "\n Type: SHT_PROGBITS"
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<< "\nSymbols:\n";
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for (const auto &Symbol : Symbols) {
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OS << " - Name: " << Symbol.Name << "\n"
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<< " Type: STT_";
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switch (Symbol.Type) {
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default:
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case IFSSymbolType::NoType:
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OS << "NOTYPE";
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break;
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case IFSSymbolType::Object:
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OS << "OBJECT";
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break;
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case IFSSymbolType::Func:
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OS << "FUNC";
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break;
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}
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OS << "\n Section: .text"
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<< "\n Binding: STB_" << (Symbol.Weak ? "WEAK" : "GLOBAL")
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<< "\n";
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}
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OS << "...\n";
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std::string YamlStr = std::string(OS.str());
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// Only or debugging. Not an offical format.
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LLVM_DEBUG({
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if (ForceFormat == "ELFOBJYAML") {
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Out << YamlStr;
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return 0;
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}
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});
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yaml::Input YIn(YamlStr);
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auto ErrHandler = [](const Twine &Msg) {
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WithColor::error(errs(), "llvm-ifs") << Msg << "\n";
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};
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return convertYAML(YIn, Out, ErrHandler) ? 0 : 1;
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}
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static int writeIfso(const IFSStub &Stub, bool IsWriteIfs, raw_ostream &Out) {
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if (IsWriteIfs) {
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yaml::Output YamlOut(Out, NULL, /*WrapColumn =*/0);
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YamlOut << const_cast<IFSStub &>(Stub);
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return 0;
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}
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std::string ObjectFileFormat =
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ForceFormat.empty() ? Stub.ObjectFileFormat : ForceFormat;
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if (ObjectFileFormat == "ELF" || ForceFormat == "ELFOBJYAML")
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return writeElfStub(llvm::Triple(Stub.Triple), Stub.Symbols,
|
||
|
|
Stub.ObjectFileFormat, Out);
|
||
|
|
if (ObjectFileFormat == "TBD")
|
||
|
|
return writeTbdStub(llvm::Triple(Stub.Triple), Stub.Symbols,
|
||
|
|
Stub.ObjectFileFormat, Out);
|
||
|
|
|
||
|
|
WithColor::error()
|
||
|
|
<< "Invalid ObjectFileFormat: Only ELF and TBD are supported.\n";
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
// TODO: Drop ObjectFileFormat, it can be subsumed from the triple.
|
||
|
|
// New Interface Stubs Yaml Format:
|
||
|
|
// --- !experimental-ifs-v2
|
||
|
|
// IfsVersion: 2.0
|
||
|
|
// Triple: <llvm triple>
|
||
|
|
// ObjectFileFormat: <ELF | others not yet supported>
|
||
|
|
// Symbols:
|
||
|
|
// _ZSymbolName: { Type: <type> }
|
||
|
|
// ...
|
||
|
|
|
||
|
|
int main(int argc, char *argv[]) {
|
||
|
|
// Parse arguments.
|
||
|
|
cl::ParseCommandLineOptions(argc, argv);
|
||
|
|
|
||
|
|
if (InputFilenames.empty())
|
||
|
|
InputFilenames.push_back("-");
|
||
|
|
|
||
|
|
IFSStub Stub;
|
||
|
|
std::map<std::string, IFSSymbol> SymbolMap;
|
||
|
|
|
||
|
|
std::string PreviousInputFilePath;
|
||
|
|
for (const std::string &InputFilePath : InputFilenames) {
|
||
|
|
Expected<std::unique_ptr<IFSStub>> StubOrErr = readInputFile(InputFilePath);
|
||
|
|
if (!StubOrErr) {
|
||
|
|
WithColor::error() << StubOrErr.takeError() << "\n";
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
std::unique_ptr<IFSStub> TargetStub = std::move(StubOrErr.get());
|
||
|
|
|
||
|
|
if (Stub.Triple.empty()) {
|
||
|
|
PreviousInputFilePath = InputFilePath;
|
||
|
|
Stub.IfsVersion = TargetStub->IfsVersion;
|
||
|
|
Stub.Triple = TargetStub->Triple;
|
||
|
|
Stub.ObjectFileFormat = TargetStub->ObjectFileFormat;
|
||
|
|
Stub.SOName = TargetStub->SOName;
|
||
|
|
Stub.NeededLibs = TargetStub->NeededLibs;
|
||
|
|
} else {
|
||
|
|
Stub.ObjectFileFormat = !Stub.ObjectFileFormat.empty()
|
||
|
|
? Stub.ObjectFileFormat
|
||
|
|
: TargetStub->ObjectFileFormat;
|
||
|
|
|
||
|
|
if (Stub.IfsVersion != TargetStub->IfsVersion) {
|
||
|
|
if (Stub.IfsVersion.getMajor() != IFSVersionCurrent.getMajor()) {
|
||
|
|
WithColor::error()
|
||
|
|
<< "Interface Stub: IfsVersion Mismatch."
|
||
|
|
<< "\nFilenames: " << PreviousInputFilePath << " "
|
||
|
|
<< InputFilePath << "\nIfsVersion Values: " << Stub.IfsVersion
|
||
|
|
<< " " << TargetStub->IfsVersion << "\n";
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
if (TargetStub->IfsVersion > Stub.IfsVersion)
|
||
|
|
Stub.IfsVersion = TargetStub->IfsVersion;
|
||
|
|
}
|
||
|
|
if (Stub.ObjectFileFormat != TargetStub->ObjectFileFormat &&
|
||
|
|
!TargetStub->ObjectFileFormat.empty()) {
|
||
|
|
WithColor::error() << "Interface Stub: ObjectFileFormat Mismatch."
|
||
|
|
<< "\nFilenames: " << PreviousInputFilePath << " "
|
||
|
|
<< InputFilePath << "\nObjectFileFormat Values: "
|
||
|
|
<< Stub.ObjectFileFormat << " "
|
||
|
|
<< TargetStub->ObjectFileFormat << "\n";
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
if (Stub.Triple != TargetStub->Triple && !TargetStub->Triple.empty()) {
|
||
|
|
WithColor::error() << "Interface Stub: Triple Mismatch."
|
||
|
|
<< "\nFilenames: " << PreviousInputFilePath << " "
|
||
|
|
<< InputFilePath
|
||
|
|
<< "\nTriple Values: " << Stub.Triple << " "
|
||
|
|
<< TargetStub->Triple << "\n";
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
if (Stub.SOName != TargetStub->SOName) {
|
||
|
|
WithColor::error() << "Interface Stub: SOName Mismatch."
|
||
|
|
<< "\nFilenames: " << PreviousInputFilePath << " "
|
||
|
|
<< InputFilePath
|
||
|
|
<< "\nSOName Values: " << Stub.SOName << " "
|
||
|
|
<< TargetStub->SOName << "\n";
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
if (Stub.NeededLibs != TargetStub->NeededLibs) {
|
||
|
|
WithColor::error() << "Interface Stub: NeededLibs Mismatch."
|
||
|
|
<< "\nFilenames: " << PreviousInputFilePath << " "
|
||
|
|
<< InputFilePath << "\n";
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (auto Symbol : TargetStub->Symbols) {
|
||
|
|
auto SI = SymbolMap.find(Symbol.Name);
|
||
|
|
if (SI == SymbolMap.end()) {
|
||
|
|
SymbolMap.insert(
|
||
|
|
std::pair<std::string, IFSSymbol>(Symbol.Name, Symbol));
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(Symbol.Name == SI->second.Name && "Symbol Names Must Match.");
|
||
|
|
|
||
|
|
// Check conflicts:
|
||
|
|
if (Symbol.Type != SI->second.Type) {
|
||
|
|
WithColor::error() << "Interface Stub: Type Mismatch for "
|
||
|
|
<< Symbol.Name << ".\nFilename: " << InputFilePath
|
||
|
|
<< "\nType Values: " << getTypeName(SI->second.Type)
|
||
|
|
<< " " << getTypeName(Symbol.Type) << "\n";
|
||
|
|
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
if (Symbol.Size != SI->second.Size) {
|
||
|
|
WithColor::error() << "Interface Stub: Size Mismatch for "
|
||
|
|
<< Symbol.Name << ".\nFilename: " << InputFilePath
|
||
|
|
<< "\nSize Values: " << SI->second.Size << " "
|
||
|
|
<< Symbol.Size << "\n";
|
||
|
|
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
if (Symbol.Weak != SI->second.Weak) {
|
||
|
|
Symbol.Weak = false;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
// TODO: Not checking Warning. Will be dropped.
|
||
|
|
}
|
||
|
|
|
||
|
|
PreviousInputFilePath = InputFilePath;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Stub.IfsVersion != IFSVersionCurrent)
|
||
|
|
if (Stub.IfsVersion.getMajor() != IFSVersionCurrent.getMajor()) {
|
||
|
|
WithColor::error() << "Interface Stub: Bad IfsVersion: "
|
||
|
|
<< Stub.IfsVersion << ", llvm-ifs supported version: "
|
||
|
|
<< IFSVersionCurrent << ".\n";
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (auto &Entry : SymbolMap)
|
||
|
|
Stub.Symbols.push_back(Entry.second);
|
||
|
|
|
||
|
|
std::error_code SysErr;
|
||
|
|
|
||
|
|
// Open file for writing.
|
||
|
|
raw_fd_ostream Out(OutputFilename, SysErr);
|
||
|
|
if (SysErr) {
|
||
|
|
WithColor::error() << "Couldn't open " << OutputFilename
|
||
|
|
<< " for writing.\n";
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return writeIfso(Stub, (Action == "write-ifs"), Out);
|
||
|
|
}
|