[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
# This program and the accompanying materials\r
# are licensed and made available under the terms and conditions of the BSD License\r
# which accompanies this distribution.  The full text of the license may be found at\r
# http://opensource.org/licenses/bsd-license.php.\r
#\r
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\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
	5	# This program and the accompanying materials\r
	6	# are licensed and made available under the terms and conditions of the BSD License\r
	7	# which accompanies this distribution. The full text of the license may be found at\r
	8	# http://opensource.org/licenses/bsd-license.php.\r
	9	#\r
	10	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	#\r
	13	#------------------------------------------------------------------------------\r
3402aac7	14	\r
13dc7fa5	15	#include <AsmMacroIoLib.h>\r
3402aac7	16	\r
1d5d0ae9	17	#/**\r
	18	# This allows the caller to switch the stack and return\r
	19	#\r
	20	# @param StackDelta Signed amount by which to modify the stack pointer\r
	21	#\r
	22	# @return Nothing. Goes to the Entry Point passing in the new parameters\r
	23	#\r
	24	#**/\r
	25	#VOID\r
	26	#EFIAPI\r
	27	#SecSwitchStack (\r
	28	# VOID *StackDelta\r
	29	# )#\r
	30	#\r
13dc7fa5	31	ASM_FUNC(SecSwitchStack)\r
1d5d0ae9	32	mov R1, R13\r
	33	add R1, R0, R1\r
	34	mov R13, R1\r
	35	bx LR\r
3402aac7 RC	36	\r
	37	\r
	38	\r