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

#------------------------------------------------------------------------------\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
#include <AsmMacroIoLib.h>\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
ASM_FUNC(SecSwitchStack)\r
    mov   R1, R13\r
    add   R1, R0, R1\r
    mov   R13, R1\r
    bx    LR\r
\r
\r
\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
13dc7fa5	9	#include <AsmMacroIoLib.h>\r
3402aac7	10	\r
1d5d0ae9	11	#/**\r
	12	# This allows the caller to switch the stack and return\r
	13	#\r
	14	# @param StackDelta Signed amount by which to modify the stack pointer\r
	15	#\r
	16	# @return Nothing. Goes to the Entry Point passing in the new parameters\r
	17	#\r
	18	#**/\r
	19	#VOID\r
	20	#EFIAPI\r
	21	#SecSwitchStack (\r
	22	# VOID *StackDelta\r
	23	# )#\r
	24	#\r
13dc7fa5	25	ASM_FUNC(SecSwitchStack)\r
1d5d0ae9	26	mov R1, R13\r
	27	add R1, R0, R1\r
	28	mov R13, R1\r
	29	bx LR\r
3402aac7 RC	30	\r
	31	\r
	32	\r