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125 lines
4.4 KiB
C
125 lines
4.4 KiB
C
/*
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* 16-bit and 32-bit mode stack frame layout
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*
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* Copyright 1995, 1998 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __WINE_STACKFRAME_H
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#define __WINE_STACKFRAME_H
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#include <string.h>
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#include "thread.h"
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#include "winnt.h"
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#include "wine/winbase16.h"
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#include "pshpack1.h"
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/* 32-bit stack layout after CallTo16() */
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typedef struct _STACK32FRAME
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{
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SEGPTR frame16; /* 00 16-bit frame from last CallFrom16() */
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DWORD restore_addr; /* 04 return address for restoring code selector */
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DWORD codeselector; /* 08 code selector to restore */
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DWORD edi; /* 0c saved registers */
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DWORD esi; /* 10 */
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DWORD edx; /* 14 */
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DWORD ecx; /* 18 */
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DWORD ebx; /* 1c */
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DWORD ebp; /* 20 saved 32-bit frame pointer */
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DWORD retaddr; /* 24 return address */
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DWORD target; /* 28 target address / CONTEXT86 pointer */
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DWORD nb_args; /* 2c number of 16-bit argument bytes */
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} STACK32FRAME;
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/* 16-bit stack layout after CallFrom16() */
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typedef struct _STACK16FRAME
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{
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STACK32FRAME *frame32; /* 00 32-bit frame from last CallTo16() */
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DWORD edx; /* 04 saved registers */
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DWORD ecx; /* 08 */
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DWORD ebp; /* 0c */
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WORD ds; /* 10 */
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WORD es; /* 12 */
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WORD fs; /* 14 */
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WORD gs; /* 16 */
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DWORD callfrom_ip; /* 18 callfrom tail IP */
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DWORD module_cs; /* 1c module code segment */
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DWORD relay; /* 20 relay function address */
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WORD entry_ip; /* 22 entry point IP */
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DWORD entry_point; /* 26 API entry point to call, reused as mutex count */
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WORD bp; /* 2a 16-bit stack frame chain */
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WORD ip; /* 2c return address */
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WORD cs; /* 2e */
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} STACK16FRAME;
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#include "poppack.h"
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#define THREAD_STACK16(teb) ((STACK16FRAME*)MapSL((teb)->cur_stack))
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#define CURRENT_STACK16 (THREAD_STACK16(NtCurrentTeb()))
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#define CURRENT_DS (CURRENT_STACK16->ds)
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/* varargs lists on the 16-bit stack */
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typedef void *VA_LIST16;
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#define __VA_ROUNDED16(type) \
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((sizeof(type) + sizeof(WORD) - 1) / sizeof(WORD) * sizeof(WORD))
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#define VA_START16(list) ((list) = (VA_LIST16)(CURRENT_STACK16 + 1))
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#define VA_ARG16(list,type) \
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(((list) = (VA_LIST16)((char *)(list) + __VA_ROUNDED16(type))), \
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*((type *)(void *)((char *)(list) - __VA_ROUNDED16(type))))
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#define VA_END16(list) ((void)0)
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/* Push bytes on the 16-bit stack of a thread;
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* return a segptr to the first pushed byte
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*/
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static inline SEGPTR WINE_UNUSED stack16_push( int size )
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{
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TEB *teb = NtCurrentTeb();
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STACK16FRAME *frame = THREAD_STACK16(teb);
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memmove( (char*)frame - size, frame, sizeof(*frame) );
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teb->cur_stack -= size;
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return (SEGPTR)(teb->cur_stack + sizeof(*frame));
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}
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/* Pop bytes from the 16-bit stack of a thread */
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static inline void WINE_UNUSED stack16_pop( int size )
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{
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TEB *teb = NtCurrentTeb();
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STACK16FRAME *frame = THREAD_STACK16(teb);
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memmove( (char*)frame + size, frame, sizeof(*frame) );
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teb->cur_stack += size;
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}
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/* Push a DWORD on the 32-bit stack */
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static inline void WINE_UNUSED stack32_push( CONTEXT86 *context, DWORD val )
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{
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context->Esp -= sizeof(DWORD);
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*(DWORD *)context->Esp = val;
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}
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/* Pop a DWORD from the 32-bit stack */
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static inline DWORD WINE_UNUSED stack32_pop( CONTEXT86 *context )
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{
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DWORD ret = *(DWORD *)context->Esp;
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context->Esp += sizeof(DWORD);
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return ret;
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}
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#endif /* __WINE_STACKFRAME_H */
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