85 lines
2.3 KiB
C++
85 lines
2.3 KiB
C++
//===- lib/Driver/Targets.cpp - Linker Targets ----------------------------===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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///
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/// Concrete instances of the Target interface.
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///
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//===----------------------------------------------------------------------===//
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#include "lld/Driver/Target.h"
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#include "lld/ReaderWriter/ReaderArchive.h"
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#include "lld/ReaderWriter/ReaderELF.h"
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#include "lld/ReaderWriter/ReaderYAML.h"
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#include "lld/ReaderWriter/WriterELF.h"
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#include "llvm/ADT/Triple.h"
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using namespace lld;
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class X86LinuxTarget final : public Target {
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public:
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X86LinuxTarget(const LinkerOptions &lo) : Target(lo), _woe(lo._entrySymbol) {
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_readerELF.reset(createReaderELF(_roe, _roa));
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_readerYAML.reset(createReaderYAML(_roy));
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_writer.reset(createWriterELF(_woe));
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}
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virtual ErrorOr<lld::Reader&> getReader(const LinkerInput &input) {
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auto kind = input.getKind();
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if (!kind)
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return error_code(kind);
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if (*kind == InputKind::YAML)
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return *_readerYAML;
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if (*kind == InputKind::Object)
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return *_readerELF;
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return llvm::make_error_code(llvm::errc::invalid_argument);
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}
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virtual ErrorOr<lld::Writer&> getWriter() {
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return *_writer;
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}
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private:
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lld::ReaderOptionsELF _roe;
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lld::ReaderOptionsArchive _roa;
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struct : lld::ReaderOptionsYAML {
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virtual Reference::Kind kindFromString(StringRef kindName) const {
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int k;
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if (kindName.getAsInteger(0, k))
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k = 0;
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return k;
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}
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} _roy;
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struct WOpts : lld::WriterOptionsELF {
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WOpts(StringRef entry) {
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_endianness = llvm::support::little;
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_is64Bit = false;
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_type = llvm::ELF::ET_EXEC;
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_machine = llvm::ELF::EM_386;
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_entryPoint = entry;
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}
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} _woe;
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std::unique_ptr<lld::Reader> _readerELF, _readerYAML;
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std::unique_ptr<lld::Writer> _writer;
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};
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std::unique_ptr<Target> Target::create(const LinkerOptions &lo) {
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llvm::Triple t(lo._target);
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if (t.getOS() == llvm::Triple::Linux && t.getArch() == llvm::Triple::x86)
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return std::unique_ptr<Target>(new X86LinuxTarget(lo));
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return std::unique_ptr<Target>();
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}
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