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diff --git a/ArmPkg/Include/Library/ArmDisassemblerLib.h b/ArmPkg/Include/Library/ArmDisassemblerLib.h
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+++ b/ArmPkg/Include/Library/ArmDisassemblerLib.h
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+/** @file
+
+  Copyright (c) 2008-2010 Apple Inc. All rights reserved.<BR>
+
+  All rights reserved. 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.
+
+**/
+
+#ifndef __ARM_DISASSEBLER_LIB_H__
+#define __ARM_DISASSEBLER_LIB_H__
+
+/**
+  Place a dissasembly of of **OpCodePtr into buffer, and update OpCodePtr to 
+  point to next instructin. 
+  
+  We cheat and only decode instructions that access 
+  memory. If the instruction is not found we dump the instruction in hex.
+   
+  @param  OpCodePtrPtr  Pointer to pointer of ARM Thumb instruction to disassemble.  
+  @param  Thumb         TRUE for Thumb(2), FALSE for ARM instruction stream
+  @param  Buf           Buffer to sprintf disassembly into.
+  @param  Size          Size of Buf in bytes. 
+  
+**/
+VOID
+DisassembleInstruction (
+  IN  UINT8     **OpCodePtr,
+  IN  BOOLEAN   Thumb,
+  OUT CHAR8     *Buf,
+  OUT UINTN     Size
+  );
+  
+#endif