411b3ff6dd
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3832 Add BaseFspSwitchStackLib Support for X64. Cc: Chasel Chiu <chasel.chiu@intel.com> Cc: Nate DeSimone <nathaniel.l.desimone@intel.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Ashraf Ali S <ashraf.ali.s@intel.com> Signed-off-by: Ted Kuo <ted.kuo@intel.com> Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
73 lines
1.9 KiB
NASM
73 lines
1.9 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2022, 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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%include "PushPopRegsNasm.inc"
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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 rax, rax
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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 rdx ; ApiParam2
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push rcx ; ApiParam1
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push rax ; FspInfoHeader
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pushfq
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cli
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PUSHA_64
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sub rsp, 16
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sidt [rsp]
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; Load new stack
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mov rcx, rsp
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call ASM_PFX(SwapStack)
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mov rsp, rax
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; Restore previous contexts
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lidt [rsp]
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add rsp, 16
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POPA_64
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popfq
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add rsp, 24 ; FspInfoHeader + ApiParam[2]
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ret
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