ArmPlatformPkg/PrePeiCore/AArch64/SwitchStack.S

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   4 # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   5 # Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
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  16
  17 .text
  18 .align 3
  19
  20 GCC_ASM_EXPORT(SecSwitchStack)
  21
  22
  23
  24 #/**
  25 #  This allows the caller to switch the stack and return
  26 #
  27 # @param      StackDelta     Signed amount by which to modify the stack pointer
  28 #
  29 # @return     Nothing. Goes to the Entry Point passing in the new parameters
  30 #
  31 #**/
  32 #VOID
  33 #EFIAPI
  34 #SecSwitchStack (
  35 #  VOID  *StackDelta
  36 #  )#
  37 #
  38 ASM_PFX(SecSwitchStack):
  39     mov   x1, sp
  40     add   x1, x0, x1
  41     mov   sp, x1
  42     ret
  43