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1 /** @file
2 AsmWriteGdtr function
3
4 Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15
16 #include "BaseLibInternals.h"
17
18
19 /**
20 Writes the current Global Descriptor Table Register (GDTR) descriptor.
21
22 Writes and the current GDTR descriptor specified by Gdtr. This function is
23 only available on IA-32 and x64.
24
25 @param Gdtr Pointer to a GDTR descriptor.
26
27 **/
28 VOID
29 EFIAPI
30 InternalX86WriteGdtr (
31 IN CONST IA32_DESCRIPTOR *Gdtr
32 )
33 {
34 _asm {
35 mov eax, Gdtr
36 lgdt fword ptr [eax]
37 }
38 }
39