projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| c8ec22a2 JY |
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 |