;------------------------------------------------------------------------------ | |
; | |
; 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 | |