f527942e6b
Fix one typo in FmpDevicePkg. Signed-off-by: Cœur <coeur@gmx.fr> Reviewed-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
69 lines
1.7 KiB
NASM
69 lines
1.7 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2016 - 2019, Intel Corporation. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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; Abstract:
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;
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; Switch the stack from temporary memory to permanent memory.
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;
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;------------------------------------------------------------------------------
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SECTION .text
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extern ASM_PFX(SwapStack)
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;------------------------------------------------------------------------------
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; UINT32
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; EFIAPI
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; Pei2LoaderSwitchStack (
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; VOID
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; )
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;------------------------------------------------------------------------------
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global ASM_PFX(Pei2LoaderSwitchStack)
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ASM_PFX(Pei2LoaderSwitchStack):
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xor eax, eax
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jmp ASM_PFX(FspSwitchStack)
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;------------------------------------------------------------------------------
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; UINT32
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; EFIAPI
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; Loader2PeiSwitchStack (
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; VOID
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; )
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;------------------------------------------------------------------------------
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global ASM_PFX(Loader2PeiSwitchStack)
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ASM_PFX(Loader2PeiSwitchStack):
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jmp ASM_PFX(FspSwitchStack)
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;------------------------------------------------------------------------------
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; UINT32
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; EFIAPI
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; FspSwitchStack (
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; VOID
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; )
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;------------------------------------------------------------------------------
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global ASM_PFX(FspSwitchStack)
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ASM_PFX(FspSwitchStack):
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; Save current contexts
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push eax
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pushfd
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cli
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pushad
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sub esp, 8
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sidt [esp]
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; Load new stack
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push esp
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call ASM_PFX(SwapStack)
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mov esp, eax
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; Restore previous contexts
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lidt [esp]
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add esp, 8
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popad
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popfd
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add esp, 4
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ret
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