2 * 16-bit and 32-bit mode stack frame layout
4 * Copyright 1995, 1998 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #ifndef __WINE_STACKFRAME_H
22 #define __WINE_STACKFRAME_H
33 #include <wine/winbase16.h>
35 #define CURRENT_STACK16 ((STACK16FRAME*)MapSL((SEGPTR)NtCurrentTeb()->WOW32Reserved))
36 #define CURRENT_DS (CURRENT_STACK16->ds)
38 /* Push bytes on the 16-bit stack of a thread;
39 * return a segptr to the first pushed byte
41 static inline SEGPTR stack16_push( int size )
43 STACK16FRAME *frame = CURRENT_STACK16;
44 memmove( (char*)frame - size, frame, sizeof(*frame) );
45 NtCurrentTeb()->WOW32Reserved = (char *)NtCurrentTeb()->WOW32Reserved - size;
46 return (SEGPTR)((char *)NtCurrentTeb()->WOW32Reserved + sizeof(*frame));
49 /* Pop bytes from the 16-bit stack of a thread */
50 static inline void stack16_pop( int size )
52 STACK16FRAME *frame = CURRENT_STACK16;
53 memmove( (char*)frame + size, frame, sizeof(*frame) );
54 NtCurrentTeb()->WOW32Reserved = (char *)NtCurrentTeb()->WOW32Reserved + size;
57 #endif /* __WINE_STACKFRAME_H */