ArmPlatformPkg/PrePeiCore/SwitchStack.S

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  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