1 #------------------------------------------------------------------------------
3 # Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
4 # Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>
5 # This program and the accompanying materials
6 # are licensed and made available under the terms and conditions of the BSD License
7 # which accompanies this distribution. The full text of the license may be found at
8 # http://opensource.org/licenses/bsd-license.php.
10 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 # InternalSwitchStack.S
19 # Implementation of a stack switch on IA-32.
21 #------------------------------------------------------------------------------
23 ASM_GLOBAL ASM_PFX(InternalSwitchStack)
25 #------------------------------------------------------------------------------
28 # InternalSwitchStack (
29 # IN SWITCH_STACK_ENTRY_POINT EntryPoint,
30 # IN VOID *Context1, OPTIONAL
31 # IN VOID *Context2, OPTIONAL
34 #------------------------------------------------------------------------------
35 ASM_PFX(InternalSwitchStack):
39 movl 20(%ebp), %esp # switch stack
46 pushl $0 # keeps gdb from unwinding stack
47 jmp *8(%ebp) # call and never return