| ;------------------------------------------------------------------------------ | |
| ; | |
| ; Copyright (c) 2016 - 2019, Intel Corporation. All rights reserved.<BR> | |
| ; SPDX-License-Identifier: BSD-2-Clause-Patent | |
| ; | |
| ; Abstract: | |
| ; | |
| ; Switch the stack from temporary memory to permanent memory. | |
| ; | |
| ;------------------------------------------------------------------------------ | |
| SECTION .text | |
| extern ASM_PFX(SwapStack) | |
| ;------------------------------------------------------------------------------ | |
| ; UINT32 | |
| ; EFIAPI | |
| ; Pei2LoaderSwitchStack ( | |
| ; VOID | |
| ; ) | |
| ;------------------------------------------------------------------------------ | |
| global ASM_PFX(Pei2LoaderSwitchStack) | |
| ASM_PFX(Pei2LoaderSwitchStack): | |
| xor eax, eax | |
| jmp ASM_PFX(FspSwitchStack) | |
| ;------------------------------------------------------------------------------ | |
| ; UINT32 | |
| ; EFIAPI | |
| ; Loader2PeiSwitchStack ( | |
| ; VOID | |
| ; ) | |
| ;------------------------------------------------------------------------------ | |
| global ASM_PFX(Loader2PeiSwitchStack) | |
| ASM_PFX(Loader2PeiSwitchStack): | |
| jmp ASM_PFX(FspSwitchStack) | |
| ;------------------------------------------------------------------------------ | |
| ; UINT32 | |
| ; EFIAPI | |
| ; FspSwitchStack ( | |
| ; VOID | |
| ; ) | |
| ;------------------------------------------------------------------------------ | |
| global ASM_PFX(FspSwitchStack) | |
| ASM_PFX(FspSwitchStack): | |
| ; Save current contexts | |
| push eax | |
| pushfd | |
| cli | |
| pushad | |
| sub esp, 8 | |
| sidt [esp] | |
| ; Load new stack | |
| push esp | |
| call ASM_PFX(SwapStack) | |
| mov esp, eax | |
| ; Restore previous contexts | |
| lidt [esp] | |
| add esp, 8 | |
| popad | |
| popfd | |
| add esp, 4 | |
| ret | |