| #------------------------------------------------------------------------------ | |
| # | |
| # 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.S | |
| # | |
| # Abstract: | |
| # | |
| #------------------------------------------------------------------------------ | |
| #------------------------------------------------------------------------------ | |
| # 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 | |
| # | |
| #------------------------------------------------------------------------------ | |
| ASM_GLOBAL ASM_PFX(InternalSwitchStack) | |
| ASM_PFX(InternalSwitchStack): | |
| movq %rcx, %rax | |
| movq %rdx, %rcx | |
| movq %r8, %rdx | |
| # | |
| # Reserve space for register parameters (rcx, rdx, r8 & r9) on the stack, | |
| # in case the callee wishes to spill them. | |
| # | |
| lea -0x20(%r9), %rsp | |
| call *%rax |