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      1 #------------------------------------------------------------------------------
      2 #
      3 # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
      4 # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
      5 # This program and the accompanying materials
      6 # are licensed and made available under the terms and conditions of the BSD License
      7 # which accompanies this distribution.  The full text of the license may be found at
      8 # http://opensource.org/licenses/bsd-license.php.
      9 #
     10 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
     11 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     12 #
     13 #------------------------------------------------------------------------------
     14 
     15 .text
     16 .align 3
     17 
     18 GCC_ASM_EXPORT(SecSwitchStack)
     19 
     20 
     21 
     22 #/**
     23 #  This allows the caller to switch the stack and return
     24 #
     25 # @param      StackDelta     Signed amount by which to modify the stack pointer
     26 #
     27 # @return     Nothing. Goes to the Entry Point passing in the new parameters
     28 #
     29 #**/
     30 #VOID
     31 #EFIAPI
     32 #SecSwitchStack (
     33 #  VOID  *StackDelta
     34 #  )#
     35 #
     36 ASM_PFX(SecSwitchStack):
     37     mov   R1, R13
     38     add   R1, R0, R1
     39     mov   R13, R1
     40     bx    LR
     41 
     42 
     43 
     44