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Commit | Line | Data |
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4c42aaff LG |
1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
efa12a3f | 3 | ; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r |
9672cd30 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
4c42aaff LG |
5 | ;\r |
6 | ; Abstract:\r | |
7 | ;\r | |
efa12a3f | 8 | ; Switch the stack from temporary memory to permenent memory.\r |
4c42aaff LG |
9 | ;\r |
10 | ;------------------------------------------------------------------------------\r | |
11 | \r | |
12 | SECTION .text\r | |
13 | \r | |
14 | extern ASM_PFX(SwapStack)\r | |
15 | \r | |
16 | ;------------------------------------------------------------------------------\r | |
17 | ; UINT32\r | |
18 | ; EFIAPI\r | |
19 | ; Pei2LoaderSwitchStack (\r | |
20 | ; VOID\r | |
21 | ; )\r | |
22 | ;------------------------------------------------------------------------------\r | |
23 | global ASM_PFX(Pei2LoaderSwitchStack)\r | |
24 | ASM_PFX(Pei2LoaderSwitchStack):\r | |
25 | xor eax, eax\r | |
26 | jmp ASM_PFX(FspSwitchStack)\r | |
27 | \r | |
28 | ;------------------------------------------------------------------------------\r | |
29 | ; UINT32\r | |
30 | ; EFIAPI\r | |
31 | ; Loader2PeiSwitchStack (\r | |
32 | ; VOID\r | |
33 | ; )\r | |
34 | ;------------------------------------------------------------------------------\r | |
35 | global ASM_PFX(Loader2PeiSwitchStack)\r | |
36 | ASM_PFX(Loader2PeiSwitchStack):\r | |
37 | jmp ASM_PFX(FspSwitchStack)\r | |
38 | \r | |
39 | ;------------------------------------------------------------------------------\r | |
40 | ; UINT32\r | |
41 | ; EFIAPI\r | |
42 | ; FspSwitchStack (\r | |
43 | ; VOID\r | |
44 | ; )\r | |
45 | ;------------------------------------------------------------------------------\r | |
46 | global ASM_PFX(FspSwitchStack)\r | |
47 | ASM_PFX(FspSwitchStack):\r | |
48 | ; Save current contexts\r | |
49 | push eax\r | |
50 | pushfd\r | |
51 | cli\r | |
52 | pushad\r | |
53 | sub esp, 8\r | |
54 | sidt [esp]\r | |
55 | \r | |
56 | ; Load new stack\r | |
57 | push esp\r | |
58 | call ASM_PFX(SwapStack)\r | |
59 | mov esp, eax\r | |
60 | \r | |
61 | ; Restore previous contexts\r | |
62 | lidt [esp]\r | |
63 | add esp, 8\r | |
64 | popad\r | |
65 | popfd\r | |
66 | add esp, 4\r | |
67 | ret\r | |
68 | \r |