2011-07-12 05:01:34 +02:00
|
|
|
#------------------------------------------------------------------------------
|
|
|
|
|
#
|
|
|
|
|
# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
|
2011-09-13 09:48:35 +02:00
|
|
|
# Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>
|
2011-07-12 05:01:34 +02:00
|
|
|
# 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:
|
|
|
|
|
#
|
|
|
|
|
# InternalSwitchStack.S
|
|
|
|
|
#
|
|
|
|
|
# Abstract:
|
|
|
|
|
#
|
|
|
|
|
# Implementation of a stack switch on IA-32.
|
|
|
|
|
#
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
ASM_GLOBAL ASM_PFX(InternalSwitchStack)
|
|
|
|
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
|
|
|
# VOID
|
|
|
|
|
# EFIAPI
|
|
|
|
|
# InternalSwitchStack (
|
|
|
|
|
# IN SWITCH_STACK_ENTRY_POINT EntryPoint,
|
|
|
|
|
# IN VOID *Context1, OPTIONAL
|
|
|
|
|
# IN VOID *Context2, OPTIONAL
|
|
|
|
|
# IN VOID *NewStack
|
|
|
|
|
# );
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
|
|
|
ASM_PFX(InternalSwitchStack):
|
|
|
|
|
pushl %ebp
|
|
|
|
|
movl %esp, %ebp
|
|
|
|
|
|
|
|
|
|
movl 20(%ebp), %esp # switch stack
|
|
|
|
|
subl $8, %esp
|
|
|
|
|
|
|
|
|
|
movl 16(%ebp), %eax
|
|
|
|
|
movl %eax, 4(%esp)
|
|
|
|
|
movl 12(%ebp), %eax
|
|
|
|
|
movl %eax, (%esp)
|
|
|
|
|
pushl $0 # keeps gdb from unwinding stack
|
|
|
|
|
jmp *8(%ebp) # call and never return
|
|
|
|
|
|
