ebf09360ec
Split up the CRuntimeFile into one part for output types that need an entry point and another part for output types that use stubs. Add file 'test/mach-o/Inputs/libSystem.yaml' for use by test cases that use -dylib and therefore may now need the helper symbol in libSystem.dylib. llvm-svn: 215602
70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
//===- lib/ReaderWriter/MachO/WriterMachO.cpp -----------------------------===//
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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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#include "lld/ReaderWriter/Writer.h"
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#include "ExecutableAtoms.hpp"
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#include "MachONormalizedFile.h"
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#include "lld/Core/File.h"
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#include "lld/ReaderWriter/MachOLinkingContext.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileOutputBuffer.h"
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#include "llvm/Support/MachO.h"
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#include "llvm/Support/raw_ostream.h"
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#include <system_error>
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using lld::mach_o::normalized::NormalizedFile;
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namespace lld {
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namespace mach_o {
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class MachOWriter : public Writer {
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public:
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MachOWriter(const MachOLinkingContext &ctxt) : _context(ctxt) { }
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std::error_code writeFile(const lld::File &file, StringRef path) override {
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// Construct empty normalized file from atoms.
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ErrorOr<std::unique_ptr<NormalizedFile>> nFile =
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normalized::normalizedFromAtoms(file, _context);
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if (std::error_code ec = nFile.getError())
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return ec;
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// For testing, write out yaml form of normalized file.
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if (_context.printAtoms()) {
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std::unique_ptr<Writer> yamlWriter = createWriterYAML(_context);
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yamlWriter->writeFile(file, "-");
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}
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// Write normalized file as mach-o binary.
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return writeBinary(*nFile->get(), path);
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}
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bool createImplicitFiles(std::vector<std::unique_ptr<File> > &r) override {
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// When building main executables, add _main as required entry point.
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if (_context.outputTypeHasEntry())
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r.emplace_back(new CEntryFile(_context));
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// If this can link with dylibs, need helper function (dyld_stub_binder).
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if (_context.needsStubsPass())
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r.emplace_back(new StubHelperFile(_context));
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return true;
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}
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private:
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const MachOLinkingContext &_context;
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};
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} // namespace mach_o
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std::unique_ptr<Writer> createWriterMachO(const MachOLinkingContext &context) {
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return std::unique_ptr<Writer>(new lld::mach_o::MachOWriter(context));
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}
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} // namespace lld
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