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878ddf1f | 1 | #------------------------------------------------------------------------------\r |
2 | #\r | |
3 | # Copyright (c) 2006, Intel Corporation\r | |
4 | # All rights reserved. This program and the accompanying materials\r | |
5 | # are licensed and made available under the terms and conditions of the BSD License\r | |
6 | # which accompanies this distribution. The full text of the license may be found at\r | |
7 | # http://opensource.org/licenses/bsd-license.php\r | |
8 | #\r | |
9 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | #\r | |
12 | # Module Name:\r | |
13 | #\r | |
14 | # DisablePaging32.Asm\r | |
15 | #\r | |
16 | # Abstract:\r | |
17 | #\r | |
18 | # AsmDisablePaging32 function\r | |
19 | #\r | |
20 | # Notes:\r | |
21 | #\r | |
22 | #------------------------------------------------------------------------------\r | |
23 | \r | |
24 | \r | |
25 | \r | |
26 | \r | |
27 | \r | |
28 | #------------------------------------------------------------------------------\r | |
29 | # VOID\r | |
30 | # EFIAPI\r | |
31 | # AsmDisablePaging32 (\r | |
32 | # IN SWITCH_STACK_ENTRY_POINT EntryPoint,\r | |
33 | # IN VOID *Context1, OPTIONAL\r | |
34 | # IN VOID *Context2, OPTIONAL\r | |
35 | # IN VOID *NewStack\r | |
36 | # );\r | |
37 | #------------------------------------------------------------------------------\r | |
38 | .global _AsmDisablePaging32\r | |
39 | _AsmDisablePaging32: \r | |
40 | movl 4(%esp),%ebx\r | |
41 | movl 8(%esp),%ecx\r | |
42 | movl 12(%esp),%edx\r | |
43 | pushfl\r | |
44 | popl %edi\r | |
45 | cli\r | |
46 | movl %cr0, %eax\r | |
47 | btrl $31,%eax\r | |
48 | movl 16(%esp),%esp\r | |
49 | movl %eax, %cr0\r | |
50 | pushl %edi\r | |
51 | popfl\r | |
52 | pushl %edx\r | |
53 | pushl %ecx\r | |
54 | call *%ebx\r | |
55 | jmp .\r | |
56 | \r | |
57 | \r | |
58 | \r |