af062818b47340eef15700d2f0211576ba3506eevboxsync#------------------------------------------------------------------------------

af062818b47340eef15700d2f0211576ba3506eevboxsync#

af062818b47340eef15700d2f0211576ba3506eevboxsync# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>

af062818b47340eef15700d2f0211576ba3506eevboxsync# Portions copyright (c) 2011, Apple Inc. All rights reserved.<BR>

af062818b47340eef15700d2f0211576ba3506eevboxsync# This program and the accompanying materials

af062818b47340eef15700d2f0211576ba3506eevboxsync# are licensed and made available under the terms and conditions of the BSD License

af062818b47340eef15700d2f0211576ba3506eevboxsync# which accompanies this distribution. The full text of the license may be found at

af062818b47340eef15700d2f0211576ba3506eevboxsync# http://opensource.org/licenses/bsd-license.php.

af062818b47340eef15700d2f0211576ba3506eevboxsync#

af062818b47340eef15700d2f0211576ba3506eevboxsync# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,

af062818b47340eef15700d2f0211576ba3506eevboxsync# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

af062818b47340eef15700d2f0211576ba3506eevboxsync#

af062818b47340eef15700d2f0211576ba3506eevboxsync# Module Name:

af062818b47340eef15700d2f0211576ba3506eevboxsync#

af062818b47340eef15700d2f0211576ba3506eevboxsync# InternalSwitchStack.S

af062818b47340eef15700d2f0211576ba3506eevboxsync#

af062818b47340eef15700d2f0211576ba3506eevboxsync# Abstract:

af062818b47340eef15700d2f0211576ba3506eevboxsync#

589fd26cedb2b4ebbed14f2964cad03cc8ebbca2vboxsync# Implementation of a stack switch on IA-32.

589fd26cedb2b4ebbed14f2964cad03cc8ebbca2vboxsync#

589fd26cedb2b4ebbed14f2964cad03cc8ebbca2vboxsync#------------------------------------------------------------------------------

589fd26cedb2b4ebbed14f2964cad03cc8ebbca2vboxsync

589fd26cedb2b4ebbed14f2964cad03cc8ebbca2vboxsyncASM_GLOBAL ASM_PFX(InternalSwitchStack)

589fd26cedb2b4ebbed14f2964cad03cc8ebbca2vboxsync

589fd26cedb2b4ebbed14f2964cad03cc8ebbca2vboxsync#------------------------------------------------------------------------------

589fd26cedb2b4ebbed14f2964cad03cc8ebbca2vboxsync# VOID

589fd26cedb2b4ebbed14f2964cad03cc8ebbca2vboxsync# EFIAPI

af062818b47340eef15700d2f0211576ba3506eevboxsync# InternalSwitchStack (

af062818b47340eef15700d2f0211576ba3506eevboxsync# IN SWITCH_STACK_ENTRY_POINT EntryPoint,

af062818b47340eef15700d2f0211576ba3506eevboxsync# IN VOID *Context1, OPTIONAL

af062818b47340eef15700d2f0211576ba3506eevboxsync# IN VOID *Context2, OPTIONAL

af062818b47340eef15700d2f0211576ba3506eevboxsync# IN VOID *NewStack

af062818b47340eef15700d2f0211576ba3506eevboxsync# );

af062818b47340eef15700d2f0211576ba3506eevboxsync#------------------------------------------------------------------------------

af062818b47340eef15700d2f0211576ba3506eevboxsyncASM_PFX(InternalSwitchStack):

af062818b47340eef15700d2f0211576ba3506eevboxsync pushl %ebp

af062818b47340eef15700d2f0211576ba3506eevboxsync movl %esp, %ebp

af062818b47340eef15700d2f0211576ba3506eevboxsync

af062818b47340eef15700d2f0211576ba3506eevboxsync movl 20(%ebp), %esp # switch stack

af062818b47340eef15700d2f0211576ba3506eevboxsync subl $8, %esp

af062818b47340eef15700d2f0211576ba3506eevboxsync

af062818b47340eef15700d2f0211576ba3506eevboxsync movl 16(%ebp), %eax

af062818b47340eef15700d2f0211576ba3506eevboxsync movl %eax, 4(%esp)

af062818b47340eef15700d2f0211576ba3506eevboxsync movl 12(%ebp), %eax

af062818b47340eef15700d2f0211576ba3506eevboxsync movl %eax, (%esp)

af062818b47340eef15700d2f0211576ba3506eevboxsync pushl $0 # keeps gdb from unwinding stack

af062818b47340eef15700d2f0211576ba3506eevboxsync jmp *8(%ebp) # call and never return

af062818b47340eef15700d2f0211576ba3506eevboxsync

af062818b47340eef15700d2f0211576ba3506eevboxsync