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diff --git a/OldMdePkg/Library/BaseLib/x86ReadIdtr.c b/OldMdePkg/Library/BaseLib/x86ReadIdtr.c
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+/** @file
+ IA-32/x64 AsmReadIdtr()
+
+ Copyright (c) 2006, Intel Corporation<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.
+
+ Module Name: x86ReadIdtr.c
+
+**/
+
+#include "BaseLibInternals.h"
+
+/**
+ Reads the current Interrupt Descriptor Table Register(GDTR) descriptor.
+
+ Reads and returns the current IDTR descriptor and returns it in Idtr. This
+ function is only available on IA-32 and X64.
+
+ If Idtr is NULL, then ASSERT().
+
+ @param Idtr Pointer to a IDTR descriptor.
+
+**/
+VOID
+EFIAPI
+AsmReadIdtr (
+ OUT IA32_DESCRIPTOR *Idtr
+ )
+{
+ ASSERT (Idtr != NULL);
+ InternalX86ReadIdtr (Idtr);
+}