1 /** @file
2 AsmReadEs 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
17
18 /**
19 Reads the current value of ES Data Segment Register (ES).
20
21 Reads and returns the current value of ES. This function is only available on
22 IA-32 and x64.
23
24 @return The current value of ES.
25
26 **/
27 UINT16
28 EFIAPI
AsmReadEs(VOID)29 AsmReadEs (
30 VOID
31 )
32 {
33 __asm {
34 xor eax, eax
35 mov ax, es
36 }
37 }
38
39