1 files changed, 39 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/WriteGdtr.c b/MdePkg/Library/BaseLib/Ia32/WriteGdtr.c
new file mode 100644
index 000000000000..905d585e4a4f
--- /dev/null
+++ b/MdePkg/Library/BaseLib/Ia32/WriteGdtr.c
@@ -0,0 +1,39 @@
+/** @file
+  AsmWriteGdtr function
+
+  Copyright (c) 2006 - 2008, 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 "BaseLibInternals.h"
+
+
+/**
+  Writes the current Global Descriptor Table Register (GDTR) descriptor.
+
+  Writes and the current GDTR descriptor specified by Gdtr. This function is
+  only available on IA-32 and x64.
+
+  @param  Gdtr  The pointer to a GDTR descriptor.
+
+**/
+VOID
+EFIAPI
+InternalX86WriteGdtr (
+  IN      CONST IA32_DESCRIPTOR     *Gdtr
+  )
+{
+  _asm {
+    mov     eax, Gdtr
+    lgdt    fword ptr [eax]
+  }
+}
+