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