projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 4c42aaff LG |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ;\r | |
| 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 | |
| 8 | ; Switch the stack from temporary memory to permenent memory.\r | |
| 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 |