wine/include/stackframe.h
2004-09-01 04:55:52 +00:00

94 lines
3.5 KiB
C

/*
* 16-bit and 32-bit mode stack frame layout
*
* Copyright 1995, 1998 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __WINE_STACKFRAME_H
#define __WINE_STACKFRAME_H
#include <string.h>
#include <thread.h>
#include <winnt.h>
#include <wine/winbase16.h>
#include <pshpack1.h>
/* 32-bit stack layout after CallTo16() */
typedef struct _STACK32FRAME
{
DWORD restore_addr; /* 00 return address for restoring code selector */
DWORD codeselector; /* 04 code selector to restore */
EXCEPTION_REGISTRATION_RECORD frame; /* 08 Exception frame */
SEGPTR frame16; /* 10 16-bit frame from last CallFrom16() */
DWORD edi; /* 14 saved registers */
DWORD esi; /* 18 */
DWORD ebx; /* 1c */
DWORD ebp; /* 20 saved 32-bit frame pointer */
DWORD retaddr; /* 24 return address */
DWORD target; /* 28 target address / CONTEXT86 pointer */
DWORD nb_args; /* 2c number of 16-bit argument bytes */
} STACK32FRAME;
/* 16-bit stack layout after CallFrom16() */
typedef struct _STACK16FRAME
{
STACK32FRAME *frame32; /* 00 32-bit frame from last CallTo16() */
DWORD edx; /* 04 saved registers */
DWORD ecx; /* 08 */
DWORD ebp; /* 0c */
WORD ds; /* 10 */
WORD es; /* 12 */
WORD fs; /* 14 */
WORD gs; /* 16 */
DWORD callfrom_ip; /* 18 callfrom tail IP */
DWORD module_cs; /* 1c module code segment */
DWORD relay; /* 20 relay function address */
WORD entry_ip; /* 22 entry point IP */
DWORD entry_point; /* 26 API entry point to call, reused as mutex count */
WORD bp; /* 2a 16-bit stack frame chain */
WORD ip; /* 2c return address */
WORD cs; /* 2e */
} STACK16FRAME;
#include <poppack.h>
#define CURRENT_STACK16 ((STACK16FRAME*)MapSL(NtCurrentTeb()->cur_stack))
#define CURRENT_DS (CURRENT_STACK16->ds)
/* Push bytes on the 16-bit stack of a thread;
* return a segptr to the first pushed byte
*/
static inline SEGPTR stack16_push( int size )
{
STACK16FRAME *frame = CURRENT_STACK16;
memmove( (char*)frame - size, frame, sizeof(*frame) );
NtCurrentTeb()->cur_stack -= size;
return (SEGPTR)(NtCurrentTeb()->cur_stack + sizeof(*frame));
}
/* Pop bytes from the 16-bit stack of a thread */
static inline void stack16_pop( int size )
{
STACK16FRAME *frame = CURRENT_STACK16;
memmove( (char*)frame + size, frame, sizeof(*frame) );
NtCurrentTeb()->cur_stack += size;
}
#endif /* __WINE_STACKFRAME_H */