segread.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 64 行

/****************************************************************************
*
*                            Open Watcom Project
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*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*    This file contains Original Code and/or Modifications of Original
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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#include "variety.h"
#include <i86.h>

extern  unsigned short  _CS( void );
extern  unsigned short  _DS( void );
extern  unsigned short  _ES( void );
extern  unsigned short  _SS( void );

#pragma aux     _CS = 0x8C 0xC8 /* mov ax,cs */ value [ax];
#pragma aux     _DS = 0x8C 0xD8 /* mov ax,ds */ value [ax];
#pragma aux     _ES = 0x8C 0xC0 /* mov ax,es */ value [ax];
#pragma aux     _SS = 0x8C 0xD0 /* mov ax,ss */ value [ax];
#if defined(__386__)
extern  unsigned short  _FS( void ), _GS( void );
#pragma aux     _FS = 0x8C 0xE0 /* mov ax,fs */ value [ax];
#pragma aux     _GS = 0x8C 0xE8 /* mov ax,gs */ value [ax];
#endif


_WCRTLINK void segread( struct SREGS *segregs )
{
    __ptr_check( segregs, 0 );
    segregs->cs = _CS();
    segregs->ds = _DS();
    segregs->es = _ES();
    segregs->ss = _SS();
#if defined(__386__)
    segregs->fs = _FS();
    segregs->gs = _GS();
#endif
}