79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
/*
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* 16-bit mode stack frame layout
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*
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* Copyright 1995 Alexandre Julliard
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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 "windows.h"
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#include "ldt.h"
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#pragma pack(1)
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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 edi; /* 04 saved registers */
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DWORD esi; /* 08 */
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DWORD edx; /* 0c */
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DWORD ecx; /* 10 */
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DWORD ebx; /* 14 */
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DWORD restore_addr; /* 18 return address for restoring code selector */
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DWORD codeselector; /* 1c code selector to restore */
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DWORD ebp; /* 20 saved 32-bit frame pointer */
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DWORD retaddr; /* 24 actual return address */
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DWORD args[1]; /* 28 arguments to 16-bit function */
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} STACK32FRAME;
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/* 16-bit stack layout after CallFrom16() */
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typedef struct
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{
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STACK32FRAME *frame32; /* 00 32-bit frame from last CallTo16() */
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DWORD ebp; /* 04 full 32-bit content of ebp */
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WORD entry_ip; /* 08 ip of entry point */
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WORD ds; /* 0a ds */
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WORD entry_cs; /* 0c cs of entry point */
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WORD es; /* 0e es */
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DWORD entry_point; /* 10 32-bit entry point to call */
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WORD bp; /* 14 16-bit bp */
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WORD ip; /* 16 return address */
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WORD cs; /* 18 */
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} STACK16FRAME;
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#pragma pack(4)
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/* Saved 16-bit stack for current process (Win16 only) */
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extern DWORD IF1632_Saved16_ss_sp;
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#define CURRENT_STACK16 ((STACK16FRAME *)PTR_SEG_TO_LIN(IF1632_Saved16_ss_sp))
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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; return a segptr to the first pushed byte */
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#define STACK16_PUSH(size) \
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(memmove((char*)CURRENT_STACK16-(size),CURRENT_STACK16,sizeof(STACK16FRAME)),\
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IF1632_Saved16_ss_sp -= (size), \
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(SEGPTR)(IF1632_Saved16_ss_sp + sizeof(STACK16FRAME)))
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/* Pop bytes from the 16-bit stack */
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#define STACK16_POP(size) \
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(memmove((char*)CURRENT_STACK16+(size),CURRENT_STACK16,sizeof(STACK16FRAME)),\
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IF1632_Saved16_ss_sp += (size))
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#endif /* __WINE_STACKFRAME_H */
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