1 /** @file
2   AsmWriteIdtr function
3 
4   Copyright (c) 2006 - 2010, 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   Writes the current Interrupt Descriptor Table Register(GDTR) descriptor.
20 
21   Writes the current IDTR descriptor and returns it in Idtr. This function is
22   only available on IA-32 and x64.
23 
24   @param  Idtr  The pointer to a IDTR descriptor.
25 
26 **/
27 VOID
28 EFIAPI
InternalX86WriteIdtr(IN CONST IA32_DESCRIPTOR * Idtr)29 InternalX86WriteIdtr (
30   IN      CONST IA32_DESCRIPTOR     *Idtr
31   )
32 {
33   _asm {
34     mov     eax, Idtr
35     pushfd
36     cli
37     lidt    fword ptr [eax]
38     popfd
39   }
40 }
41 
42