;------------------------------------------------------------------------------

;

; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>

; This program and the accompanying materials

; are licensed and made available under the terms and conditions of the BSD License

; which accompanies this distribution. The full text of the license may be found at

; http://opensource.org/licenses/bsd-license.php.

;

; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,

; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

;

; Module Name:

;

; SwitchStack.Asm

;

; Abstract:

;

;------------------------------------------------------------------------------

.code

;------------------------------------------------------------------------------

; 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

;

;------------------------------------------------------------------------------

InternalSwitchStack PROC

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 - 20h]

call rax

InternalSwitchStack ENDP

END