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/*
* 16-bit mode stack frame layout
*
* Copyright 1995 Alexandre Julliard
*/
#ifndef __WINE_STACKFRAME_H
#define __WINE_STACKFRAME_H
#include <string.h>
#include "windows.h"
#include "ldt.h"
#include "thread.h"
#pragma pack(1)
/* 32-bit stack layout after CallTo16() */
typedef struct _STACK32FRAME
{
SEGPTR frame16; /* 00 16-bit frame from last CallFrom16() */
DWORD edi; /* 04 saved registers */
DWORD esi; /* 08 */
DWORD edx; /* 0c */
DWORD ecx; /* 10 */
DWORD ebx; /* 14 */
DWORD restore_addr; /* 18 return address for restoring code selector */
DWORD codeselector; /* 1c code selector to restore */
DWORD ebp; /* 20 saved 32-bit frame pointer */
DWORD retaddr; /* 24 actual return address */
DWORD args[1]; /* 28 arguments to 16-bit function */
} STACK32FRAME;
/* 16-bit stack layout after CallFrom16() */
typedef struct
{
STACK32FRAME *frame32; /* 00 32-bit frame from last CallTo16() */
DWORD ebp; /* 04 full 32-bit content of ebp */
WORD entry_ip; /* 08 ip of entry point */
WORD ds; /* 0a ds */
WORD entry_cs; /* 0c cs of entry point */
WORD es; /* 0e es */
DWORD entry_point; /* 10 32-bit entry point to call */
WORD bp; /* 14 16-bit bp */
WORD ip; /* 16 return address */
WORD cs; /* 18 */
} STACK16FRAME;
#pragma pack(4)
#define THREAD_STACK16(thdb) ((STACK16FRAME*)PTR_SEG_TO_LIN((thdb)->cur_stack))
#define CURRENT_STACK16 (THREAD_STACK16(THREAD_Current()))
#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
*/
#define STACK16_PUSH(thdb,size) \
(memmove((char*)THREAD_STACK16(thdb)-(size),THREAD_STACK16(thdb), \
sizeof(STACK16FRAME)), \
(thdb)->cur_stack -= (size), \
(SEGPTR)((thdb)->cur_stack + sizeof(STACK16FRAME)))
/* Pop bytes from the 16-bit stack of a thread */
#define STACK16_POP(thdb,size) \
(memmove((char*)THREAD_STACK16(thdb)+(size),THREAD_STACK16(thdb), \
sizeof(STACK16FRAME)), \
(thdb)->cur_stack += (size))
#endif /* __WINE_STACKFRAME_H */
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