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1 | /** @file\r |
2 | AsmReadFs function\r |
3 | \r |
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4 | Copyright (c) 2006 - 2008, Intel Corporation<BR>\r |
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5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r |
8 | http://opensource.org/licenses/bsd-license.php\r |
9 | \r |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
12 | \r |
13 | **/\r |
14 | \r |
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15 | \r |
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16 | \r |
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17 | \r |
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18 | /**\r |
19 | Reads the current value of FS Data Segment Register (FS).\r |
20 | \r |
21 | Reads and returns the current value of FS. This function is only available on\r |
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22 | IA-32 and x64.\r |
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23 | \r |
24 | @return The current value of FS.\r |
25 | \r |
26 | **/\r |
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27 | UINT16\r |
28 | EFIAPI\r |
29 | AsmReadFs (\r |
30 | VOID\r |
31 | )\r |
32 | {\r |
33 | __asm {\r |
34 | xor eax, eax\r |
35 | mov ax, fs\r |
36 | }\r |
37 | }\r |
38 | \r |