getdsint.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 53 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  DS register manipulation routines for x86.
*
****************************************************************************/


#include "variety.h"
#include <i86.h>
#include "rtinit.h"

static unsigned short __saved_ds;

extern void __load_ds( void );
#pragma aux __load_ds = "mov ds, cs:__saved_ds";

void __GETDS( void )
{
    __load_ds();
}
#pragma aux __GETDS "*";

static void __save_ds( void )
{
    __saved_ds = FP_SEG( &__saved_ds );
}

AXI( __save_ds, INIT_PRIORITY_RUNTIME );