1 files changed, 74 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..cfe0eb4
--- /dev/null
+++ b/contrib/llvm/lib/Object/ELFObjectFile.cpp
@@ -0,0 +1,74 @@
+//===- 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/ELF.h"
+#include "llvm/Support/MathExtras.h"
+
+namespace llvm {
+
+using namespace object;
+
+// Creates an in-memory object-file by default: createELFObjectFile(Buffer)
+ObjectFile *ObjectFile::createELFObjectFile(MemoryBuffer *Object) {
+  std::pair<unsigned char, unsigned char> Ident = getElfArchType(Object);
+  error_code ec;
+
+  std::size_t MaxAlignment =
+    1ULL << CountTrailingZeros_64(uintptr_t(Object->getBufferStart()));
+
+  if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB)
+#if !LLVM_IS_UNALIGNED_ACCESS_FAST
+    if (MaxAlignment >= 4)
+      return new ELFObjectFile<ELFType<support::little, 4, false> >(Object, ec);
+    else
+#endif
+    if (MaxAlignment >= 2)
+      return new ELFObjectFile<ELFType<support::little, 2, false> >(Object, ec);
+    else
+      llvm_unreachable("Invalid alignment for ELF file!");
+  else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB)
+#if !LLVM_IS_UNALIGNED_ACCESS_FAST
+    if (MaxAlignment >= 4)
+      return new ELFObjectFile<ELFType<support::big, 4, false> >(Object, ec);
+    else
+#endif
+    if (MaxAlignment >= 2)
+      return new ELFObjectFile<ELFType<support::big, 2, false> >(Object, ec);
+    else
+      llvm_unreachable("Invalid alignment for ELF file!");
+  else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB)
+#if !LLVM_IS_UNALIGNED_ACCESS_FAST
+    if (MaxAlignment >= 8)
+      return new ELFObjectFile<ELFType<support::big, 8, true> >(Object, ec);
+    else
+#endif
+    if (MaxAlignment >= 2)
+      return new ELFObjectFile<ELFType<support::big, 2, true> >(Object, ec);
+    else
+      llvm_unreachable("Invalid alignment for ELF file!");
+  else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) {
+#if !LLVM_IS_UNALIGNED_ACCESS_FAST
+    if (MaxAlignment >= 8)
+      return new ELFObjectFile<ELFType<support::little, 8, true> >(Object, ec);
+    else
+#endif
+    if (MaxAlignment >= 2)
+      return new ELFObjectFile<ELFType<support::little, 2, true> >(Object, ec);
+    else
+      llvm_unreachable("Invalid alignment for ELF file!");
+  }
+
+  report_fatal_error("Buffer is not an ELF object file!");
+}
+
+} // end namespace llvm