[mirror_edk2.git] / ArmPlatformPkg / PrePeiCore / Arm / SwitchStack.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r
; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
; SPDX-License-Identifier: BSD-2-Clause-Patent\r
;\r
;------------------------------------------------------------------------------\r
\r
    EXPORT SecSwitchStack\r
\r
    AREA   Switch_Stack, CODE, READONLY\r
\r
;/**\r
;  This allows the caller to switch the stack and return\r
;\r
; @param      StackDelta     Signed amount by which to modify the stack pointer\r
;\r
; @return     Nothing. Goes to the Entry Point passing in the new parameters\r
;\r
;**/\r
;VOID\r
;EFIAPI\r
;SecSwitchStack (\r
;  VOID  *StackDelta\r
;  );\r
;\r
SecSwitchStack\r
    MOV   R1, SP\r
    ADD   R1, R0, R1\r
    MOV   SP, R1\r
    BX    LR\r
    END\r
Commit	Line	Data
3402aac7	1	;------------------------------------------------------------------------------\r
1d5d0ae9	2	;\r
	3	; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r
	4	; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
f4dfad05	5	; SPDX-License-Identifier: BSD-2-Clause-Patent\r
1d5d0ae9	6	;\r
1d5d0ae9	7	;------------------------------------------------------------------------------\r
3402aac7	8	\r
1d5d0ae9	9	EXPORT SecSwitchStack\r
3402aac7	10	\r
1d5d0ae9	11	AREA Switch_Stack, CODE, READONLY\r
3402aac7	12	\r
1d5d0ae9	13	;/**\r
	14	; This allows the caller to switch the stack and return\r
	15	;\r
	16	; @param StackDelta Signed amount by which to modify the stack pointer\r
	17	;\r
	18	; @return Nothing. Goes to the Entry Point passing in the new parameters\r
	19	;\r
	20	;**/\r
	21	;VOID\r
	22	;EFIAPI\r
	23	;SecSwitchStack (\r
	24	; VOID *StackDelta\r
	25	; );\r
	26	;\r
3402aac7	27	SecSwitchStack\r
1d5d0ae9	28	MOV R1, SP\r
	29	ADD R1, R0, R1\r
	30	MOV SP, R1\r
	31	BX LR\r
	32	END\r