audk/ArmPlatformPkg/PrePeiCore/Arm/SwitchStack.S

#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution.  The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php.
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#------------------------------------------------------------------------------

#include <AsmMacroIoLib.h>

#/**
#  This allows the caller to switch the stack and return
#
# @param      StackDelta     Signed amount by which to modify the stack pointer
#
# @return     Nothing. Goes to the Entry Point passing in the new parameters
#
#**/
#VOID
#EFIAPI
#SecSwitchStack (
#  VOID  *StackDelta
#  )#
#
ASM_FUNC(SecSwitchStack)
    mov   R1, R13
    add   R1, R0, R1
    mov   R13, R1
    bx    LR