1 ;------------------------------------------------------------------------------ 2 ; 3 ; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> 4 ; This program and the accompanying materials 5 ; are licensed and made available under the terms and conditions of the BSD License 6 ; which accompanies this distribution. The full text of the license may be found at 7 ; http://opensource.org/licenses/bsd-license.php. 8 ; 9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 ; 12 ; Module Name: 13 ; 14 ; SwitchStack.Asm 15 ; 16 ; Abstract: 17 ; 18 ;------------------------------------------------------------------------------ 19 20 .code 21 22 ;------------------------------------------------------------------------------ 23 ; Routine Description: 24 ; 25 ; Routine for switching stacks with 2 parameters 26 ; 27 ; Arguments: 28 ; 29 ; (rcx) EntryPoint - Entry point with new stack. 30 ; (rdx) Context1 - Parameter1 for entry point. 31 ; (r8) Context2 - Parameter2 for entry point. 32 ; (r9) NewStack - The pointer to new stack. 33 ; 34 ; Returns: 35 ; 36 ; None 37 ; 38 ;------------------------------------------------------------------------------ 39 InternalSwitchStack PROC 40 mov rax, rcx 41 mov rcx, rdx 42 mov rdx, r8 43 ; 44 ; Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack, 45 ; in case the callee wishes to spill them. 46 ; 47 lea rsp, [r9 - 20h] 48 call rax 49 InternalSwitchStack ENDP 50 51 END 52
