update CLib startup code

git-svn-id: svn://kolibrios.org@615 a494cfbc-eb01-0410-851d-a64ba20cac60

programs/develop/open watcom/trunk/clib/crt/extfunc.h

@@ -0,0 +1,106 @@
+/****************************************************************************
+*
+*                            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:  Special interface for calls to non-Watcom routines from
+*               inside clib (x86 specific).
+*
+****************************************************************************/
+
+
+#ifndef EXTFUNC_H_INCLUDED
+#define EXTFUNC_H_INCLUDED
+
+#include "variety.h"
+
+#if defined(_M_IX86)
+    #if !defined(__WINDOWS__)
+        #if defined(__BIG_DATA__)
+            #define __DS        ds
+        #endif
+    #endif
+
+    #if !defined(__FLAT__)
+        #define __ES    es
+    #endif
+
+    #if defined(__386__)
+        #if defined(__WINDOWS__) || !defined(__FLAT__)
+            #define __FS        fs
+        #endif
+
+        #define __GS    gs
+        #if defined(__SW_3S)
+            #define __AX        eax
+            #define __BX        ebx
+            #define __CX        ecx
+            #define __DX        edx
+        #endif
+    #endif
+
+    #ifndef __AX
+        #define __AX
+    #endif
+    #ifndef __BX
+        #define __BX
+    #endif
+    #ifndef __CX
+        #define __CX
+    #endif
+    #ifndef __DX
+        #define __DX
+    #endif
+    #ifndef __DS
+        #define __DS
+    #endif
+    #ifndef __ES
+        #define __ES
+    #endif
+    #ifndef __FS
+        #define __FS
+    #endif
+    #ifndef __GS
+        #define __GS
+    #endif
+
+    #pragma aux __outside_CLIB modify [__AX __BX __CX __DX __DS __ES __FS __GS];
+    /*
+            use as follows:
+
+    typedef void vfv( void );
+    #pragma aux (__outside_CLIB) __vfv;
+    */
+
+    #undef __AX
+    #undef __BX
+    #undef __CX
+    #undef __DX
+    #undef __DS
+    #undef __ES
+    #undef __FS
+    #undef __GS
+#endif
+
+#endif