1 files changed, 63 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseMemoryLibOptPei/CopyMemWrapper.c b/MdePkg/Library/BaseMemoryLibOptPei/CopyMemWrapper.c
new file mode 100644
index 000000000000..f1a97699445d
--- /dev/null
+++ b/MdePkg/Library/BaseMemoryLibOptPei/CopyMemWrapper.c
@@ -0,0 +1,63 @@
+/** @file
+  CopyMem() implementation.
+
+  The following BaseMemoryLib instances contain the same copy of this file:
+  
+    BaseMemoryLib
+    BaseMemoryLibMmx
+    BaseMemoryLibSse2
+    BaseMemoryLibRepStr
+    BaseMemoryLibOptDxe
+    BaseMemoryLibOptPei
+    PeiMemoryLib
+    UefiMemoryLib
+
+  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "MemLibInternals.h"
+
+/**
+  Copies a source buffer to a destination buffer, and returns the destination buffer.
+
+  This function copies Length bytes from SourceBuffer to DestinationBuffer, and returns
+  DestinationBuffer.  The implementation must be reentrant, and it must handle the case
+  where SourceBuffer overlaps DestinationBuffer.
+  
+  If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT().
+  If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
+
+  @param  DestinationBuffer   The pointer to the destination buffer of the memory copy.
+  @param  SourceBuffer        The pointer to the source buffer of the memory copy.
+  @param  Length              The number of bytes to copy from SourceBuffer to DestinationBuffer.
+
+  @return DestinationBuffer.
+
+**/
+VOID *
+EFIAPI
+CopyMem (
+  OUT VOID       *DestinationBuffer,
+  IN CONST VOID  *SourceBuffer,
+  IN UINTN       Length
+  )
+{
+  if (Length == 0) {
+    return DestinationBuffer;
+  }
+  ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));
+  ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));
+
+  if (DestinationBuffer == SourceBuffer) {
+    return DestinationBuffer;
+  }
+  return InternalMemCopyMem (DestinationBuffer, SourceBuffer, Length);
+}