wine/include/stackframe.h

127 lines
4.4 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_FRAME frame; /* 08 Exception frame */
SEGPTR frame16; /* 10 16-bit frame from last CallFrom16() */
DWORD edi; /* 14 saved registers */
DWORD esi; /* 18 */
DWORD edx; /* 1c */
DWORD ecx; /* 20 */
DWORD ebx; /* 24 */
DWORD ebp; /* 28 saved 32-bit frame pointer */
DWORD retaddr; /* 2c return address */
DWORD target; /* 30 target address / CONTEXT86 pointer */
DWORD nb_args; /* 34 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 THREAD_STACK16(teb) ((STACK16FRAME*)MapSL((teb)->cur_stack))
#define CURRENT_STACK16 (THREAD_STACK16(NtCurrentTeb()))
#define CURRENT_DS (CURRENT_STACK16->ds)
/* varargs lists on the 16-bit stack */
typedef void *VA_LIST16;
#define __VA_ROUNDED16(type) \
((sizeof(type) + sizeof(WORD) - 1) / sizeof(WORD) * sizeof(WORD))
#define VA_START16(list) ((list) = (VA_LIST16)(CURRENT_STACK16 + 1))
#define VA_ARG16(list,type) \
(((list) = (VA_LIST16)((char *)(list) + __VA_ROUNDED16(type))), \
*((type *)(void *)((char *)(list) - __VA_ROUNDED16(type))))
#define VA_END16(list) ((void)0)
/* Push bytes on the 16-bit stack of a thread;
* return a segptr to the first pushed byte
*/
static inline SEGPTR WINE_UNUSED stack16_push( int size )
{
TEB *teb = NtCurrentTeb();
STACK16FRAME *frame = THREAD_STACK16(teb);
memmove( (char*)frame - size, frame, sizeof(*frame) );
teb->cur_stack -= size;
return (SEGPTR)(teb->cur_stack + sizeof(*frame));
}
/* Pop bytes from the 16-bit stack of a thread */
static inline void WINE_UNUSED stack16_pop( int size )
{
TEB *teb = NtCurrentTeb();
STACK16FRAME *frame = THREAD_STACK16(teb);
memmove( (char*)frame + size, frame, sizeof(*frame) );
teb->cur_stack += size;
}
/* Push a DWORD on the 32-bit stack */
static inline void WINE_UNUSED stack32_push( CONTEXT86 *context, DWORD val )
{
context->Esp -= sizeof(DWORD);
*(DWORD *)context->Esp = val;
}
/* Pop a DWORD from the 32-bit stack */
static inline DWORD WINE_UNUSED stack32_pop( CONTEXT86 *context )
{
DWORD ret = *(DWORD *)context->Esp;
context->Esp += sizeof(DWORD);
return ret;
}
#endif /* __WINE_STACKFRAME_H */