1 files changed, 102 insertions, 0 deletions
diff --git a/lld/lib/ReaderWriter/ELF/ELFReader.h b/lld/lib/ReaderWriter/ELF/ELFReader.h
new file mode 100644
index 00000000000..cdd7a54d04c
--- /dev/null
+++ b/lld/lib/ReaderWriter/ELF/ELFReader.h
@@ -0,0 +1,102 @@
+//===- lib/ReaderWriter/ELF/ELFReader.h -----------------------------------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_READER_WRITER_ELF_READER_H
+#define LLD_READER_WRITER_ELF_READER_H
+
+#include "CreateELF.h"
+#include "DynamicFile.h"
+#include "ELFFile.h"
+
+#include "lld/ReaderWriter/Reader.h"
+
+namespace lld {
+namespace elf {
+
+struct DynamicFileCreateELFTraits {
+  typedef llvm::ErrorOr<std::unique_ptr<lld::SharedLibraryFile>> result_type;
+
+  template <class ELFT>
+  static result_type create(std::unique_ptr<llvm::MemoryBuffer> mb,
+                            bool useUndefines) {
+    return lld::elf::DynamicFile<ELFT>::create(std::move(mb), useUndefines);
+  }
+};
+
+struct ELFFileCreateELFTraits {
+  typedef llvm::ErrorOr<std::unique_ptr<lld::File>> result_type;
+
+  template <class ELFT>
+  static result_type create(std::unique_ptr<llvm::MemoryBuffer> mb,
+                            bool atomizeStrings, TargetHandlerBase *handler) {
+    return lld::elf::ELFFile<ELFT>::create(std::move(mb), atomizeStrings,
+                                           handler);
+  }
+};
+
+class ELFObjectReader : public Reader {
+public:
+  ELFObjectReader(bool atomizeStrings, TargetHandlerBase *handler)
+      : _atomizeStrings(atomizeStrings), _handler(handler) {}
+
+  virtual bool canParse(file_magic magic, StringRef,
+                        const MemoryBuffer &) const {
+    return (magic == llvm::sys::fs::file_magic::elf_relocatable);
+  }
+
+  virtual error_code
+  parseFile(std::unique_ptr<MemoryBuffer> &mb, const class Registry &,
+            std::vector<std::unique_ptr<File>> &result) const {
+    std::size_t maxAlignment =
+        1ULL << llvm::countTrailingZeros(uintptr_t(mb->getBufferStart()));
+    auto f = createELF<ELFFileCreateELFTraits>(
+        llvm::object::getElfArchType(&*mb), maxAlignment, std::move(mb),
+        _atomizeStrings, _handler);
+    if (error_code ec = f.getError())
+      return ec;
+    result.push_back(std::move(*f));
+    return error_code::success();
+  }
+
+private:
+  bool _atomizeStrings;
+  TargetHandlerBase *_handler;
+};
+
+class ELFDSOReader : public Reader {
+public:
+  ELFDSOReader(bool useUndefines) : _useUndefines(useUndefines) {}
+
+  virtual bool canParse(file_magic magic, StringRef,
+                        const MemoryBuffer &) const {
+    return (magic == llvm::sys::fs::file_magic::elf_shared_object);
+  }
+
+  virtual error_code
+  parseFile(std::unique_ptr<MemoryBuffer> &mb, const class Registry &,
+            std::vector<std::unique_ptr<File>> &result) const {
+    std::size_t maxAlignment =
+        1ULL << llvm::countTrailingZeros(uintptr_t(mb->getBufferStart()));
+    auto f = createELF<DynamicFileCreateELFTraits>(
+        llvm::object::getElfArchType(&*mb), maxAlignment, std::move(mb),
+        _useUndefines);
+    if (error_code ec = f.getError())
+      return ec;
+    result.push_back(std::move(*f));
+    return error_code::success();
+  }
+
+private:
+  bool _useUndefines;
+};
+
+} // namespace elf
+} // namespace lld
+
+#endif // LLD_READER_WRITER_ELF_READER_H