ArmPlatformPkg/PrePeiCore/Arm/SwitchStack.S

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   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
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  10 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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  13 #------------------------------------------------------------------------------
  14
  15 #include <AsmMacroIoLib.h>
  16
  17 #/**
  18 #  This allows the caller to switch the stack and return
  19 #
  20 # @param      StackDelta     Signed amount by which to modify the stack pointer
  21 #
  22 # @return     Nothing. Goes to the Entry Point passing in the new parameters
  23 #
  24 #**/
  25 #VOID
  26 #EFIAPI
  27 #SecSwitchStack (
  28 #  VOID  *StackDelta
  29 #  )#
  30 #
  31 ASM_FUNC(SecSwitchStack)
  32     mov   R1, R13
  33     add   R1, R0, R1
  34     mov   R13, R1
  35     bx    LR
  36
  37
  38