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1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
3 | ; Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>\r | |
4 | ; 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 | ; Abstract:\r | |
13 | ;\r | |
14 | ; Switch the stack from temporary memory to permenent memory.\r | |
15 | ;\r | |
16 | ;------------------------------------------------------------------------------\r | |
17 | \r | |
18 | .586p\r | |
19 | .model flat,C\r | |
20 | .code\r | |
21 | \r | |
22 | ;------------------------------------------------------------------------------\r | |
23 | ; UINT32\r | |
24 | ; EFIAPI\r | |
25 | ; Pei2LoaderSwitchStack (\r | |
26 | ; VOID\r | |
27 | ; )\r | |
28 | ;------------------------------------------------------------------------------\r | |
29 | EXTERNDEF C MeasurePoint:PROC\r | |
30 | Pei2LoaderSwitchStack PROC C PUBLIC\r | |
31 | jmp Loader2PeiSwitchStack\r | |
32 | Pei2LoaderSwitchStack ENDP\r | |
33 | \r | |
34 | ;------------------------------------------------------------------------------\r | |
35 | ; UINT32\r | |
36 | ; EFIAPI\r | |
37 | ; Loader2PeiSwitchStack (\r | |
38 | ; VOID\r | |
39 | ; )\r | |
40 | ;------------------------------------------------------------------------------\r | |
41 | EXTERNDEF C SwapStack:PROC\r | |
42 | Loader2PeiSwitchStack PROC C PUBLIC\r | |
43 | ; Save current contexts\r | |
44 | push offset exit\r | |
45 | pushfd\r | |
46 | cli\r | |
47 | pushad\r | |
48 | sub esp, 8\r | |
49 | sidt fword ptr [esp]\r | |
50 | \r | |
51 | ; Load new stack\r | |
52 | push esp\r | |
53 | call SwapStack\r | |
54 | mov esp, eax\r | |
55 | \r | |
56 | ; Restore previous contexts\r | |
57 | lidt fword ptr [esp]\r | |
58 | add esp, 8\r | |
59 | popad\r | |
60 | popfd\r | |
61 | exit:\r | |
62 | ret\r | |
63 | Loader2PeiSwitchStack ENDP\r | |
64 | \r | |
65 | END\r |