1 files changed, 86 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Object/ELFObjectFile.cpp b/contrib/llvm/lib/Object/ELFObjectFile.cpp
new file mode 100644
index 0000000..4f0f60b
--- /dev/null
+++ b/contrib/llvm/lib/Object/ELFObjectFile.cpp
@@ -0,0 +1,86 @@
+//===- ELFObjectFile.cpp - ELF object file implementation -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Part of the ELFObjectFile class implementation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/ELFObjectFile.h"
+#include "llvm/Support/MathExtras.h"
+
+namespace llvm {
+using namespace object;
+
+ErrorOr<ObjectFile *>
+ObjectFile::createELFObjectFile(std::unique_ptr<MemoryBuffer> &Obj) {
+  std::pair<unsigned char, unsigned char> Ident =
+      getElfArchType(Obj->getBuffer());
+  std::size_t MaxAlignment =
+    1ULL << countTrailingZeros(uintptr_t(Obj->getBufferStart()));
+
+  std::error_code EC;
+  std::unique_ptr<ObjectFile> R;
+  if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB)
+#if !LLVM_IS_UNALIGNED_ACCESS_FAST
+    if (MaxAlignment >= 4)
+      R.reset(new ELFObjectFile<ELFType<support::little, 4, false>>(
+          std::move(Obj), EC));
+    else
+#endif
+    if (MaxAlignment >= 2)
+      R.reset(new ELFObjectFile<ELFType<support::little, 2, false>>(
+          std::move(Obj), EC));
+    else
+      return object_error::parse_failed;
+  else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB)
+#if !LLVM_IS_UNALIGNED_ACCESS_FAST
+    if (MaxAlignment >= 4)
+      R.reset(new ELFObjectFile<ELFType<support::big, 4, false>>(std::move(Obj),
+                                                                 EC));
+    else
+#endif
+    if (MaxAlignment >= 2)
+      R.reset(new ELFObjectFile<ELFType<support::big, 2, false>>(std::move(Obj),
+                                                                 EC));
+    else
+      return object_error::parse_failed;
+  else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB)
+#if !LLVM_IS_UNALIGNED_ACCESS_FAST
+    if (MaxAlignment >= 8)
+      R.reset(new ELFObjectFile<ELFType<support::big, 8, true>>(std::move(Obj),
+                                                                EC));
+    else
+#endif
+    if (MaxAlignment >= 2)
+      R.reset(new ELFObjectFile<ELFType<support::big, 2, true>>(std::move(Obj),
+                                                                EC));
+    else
+      return object_error::parse_failed;
+  else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) {
+#if !LLVM_IS_UNALIGNED_ACCESS_FAST
+    if (MaxAlignment >= 8)
+      R.reset(new ELFObjectFile<ELFType<support::little, 8, true>>(
+          std::move(Obj), EC));
+    else
+#endif
+    if (MaxAlignment >= 2)
+      R.reset(new ELFObjectFile<ELFType<support::little, 2, true>>(
+          std::move(Obj), EC));
+    else
+      return object_error::parse_failed;
+  }
+  else
+    llvm_unreachable("Buffer is not an ELF object file!");
+
+  if (EC)
+    return EC;
+  return R.release();
+}
+
+} // end namespace llvm