audk/ArmPlatformPkg/PrePeiCore/Arm/SwitchStack.S

39 lines
1.2 KiB
ArmAsm

#------------------------------------------------------------------------------
#
# 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