ArmPlatformPkg/PrePeiCore/AArch64/SwitchStack.S

   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 # Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
   6 #
   7 # SPDX-License-Identifier: BSD-2-Clause-Patent
   8 #
   9 #------------------------------------------------------------------------------
  10
  11 #include <AsmMacroIoLibV8.h>
  12
  13 #/**
  14 #  This allows the caller to switch the stack and return
  15 #
  16 # @param      StackDelta     Signed amount by which to modify the stack pointer
  17 #
  18 # @return     Nothing. Goes to the Entry Point passing in the new parameters
  19 #
  20 #**/
  21 #VOID
  22 #EFIAPI
  23 #SecSwitchStack (
  24 #  VOID  *StackDelta
  25 #  )#
  26 #
  27 ASM_FUNC(SecSwitchStack)
  28     mov   x1, sp
  29     add   x1, x0, x1
  30     mov   sp, x1
  31     ret
  32