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;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
;
; SwitchStack.Asm
;
; Abstract:
;
;------------------------------------------------------------------------------
DEFAULT REL
SECTION .text
;------------------------------------------------------------------------------
; Routine Description:
;
; Routine for switching stacks with 2 parameters
;
; Arguments:
;
; (rcx) EntryPoint - Entry point with new stack.
; (rdx) Context1 - Parameter1 for entry point.
; (r8) Context2 - Parameter2 for entry point.
; (r9) NewStack - The pointer to new stack.
;
; Returns:
;
; None
;
;------------------------------------------------------------------------------
global ASM_PFX(InternalSwitchStack)
ASM_PFX(InternalSwitchStack):
mov rax, rcx
mov rcx, rdx
mov rdx, r8
;
; Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack,
; in case the callee wishes to spill them.
;
lea rsp, [r9 - 0x20]
call rax
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