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1 | /** @file\r | |
2 | AsmWriteDr5 function\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r | |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
6 | \r | |
7 | **/\r | |
8 | \r | |
9 | /**\r | |
10 | Writes a value to Debug Register 5 (DR5).\r | |
11 | \r | |
12 | Writes and returns a new value to DR5. This function is only available on\r | |
13 | IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.\r | |
14 | \r | |
15 | @param Value The value to write to Dr5.\r | |
16 | \r | |
17 | @return The value written to Debug Register 5 (DR5).\r | |
18 | \r | |
19 | **/\r | |
20 | UINTN\r | |
21 | EFIAPI\r | |
22 | AsmWriteDr5 (\r | |
23 | IN UINTN Value\r | |
24 | )\r | |
25 | {\r | |
26 | _asm {\r | |
27 | mov eax, Value\r | |
28 | _emit 0x0f // mov dr5, eax\r | |
29 | _emit 0x23\r | |
30 | _emit 0xe8\r | |
31 | }\r | |
32 | }\r |