2 * 16-bit mode stack frame layout
4 * Copyright 1995 Alexandre Julliard
7 #ifndef WINE_STACKFRAME_H
8 #define WINE_STACKFRAME_H
17 /* 16-bit stack layout after CallTo32() */
20 WORD saved_ss; /* saved previous 16-bit stack */
23 WORD ds; /* 16-bit ds */
24 DWORD entry_point WINE_PACKED; /* entry point to call */
25 WORD ordinal_number; /* ordinal number of entry point */
26 WORD dll_id; /* DLL id of entry point */
27 WORD bp; /* 16-bit bp */
28 WORD ip; /* return address */
30 WORD args[1]; /* arguments to API function */
33 /* 32-bit stack layout after CallTo16() */
36 DWORD saved_esp; /* saved previous 32-bit stack */
37 DWORD edi; /* saved registers */
42 DWORD ebp; /* saved 32-bit frame pointer */
43 DWORD retaddr; /* return address */
44 DWORD codeselector; /* code selector for return address */
45 DWORD args[1]; /* arguments to 16-bit function */
52 /* Saved 16-bit stack */
53 extern WORD IF1632_Saved16_ss;
54 extern WORD IF1632_Saved16_sp;
56 /* Saved 32-bit stack */
57 extern DWORD IF1632_Saved32_esp;
58 extern SEGPTR IF1632_Stack32_base;
59 extern DWORD IF1632_Original32_esp;
62 #define CURRENT_STACK16 \
63 ((STACK16FRAME *)PTR_SEG_OFF_TO_LIN(IF1632_Saved16_ss,IF1632_Saved16_sp))
65 #define CURRENT_DS (CURRENT_STACK16->ds)
67 /* Make a segmented pointer from a pointer to a variable located */
68 /* on the 32-bit stack for the current task. */
69 #define MAKE_SEGPTR(ptr) \
70 ((SEGPTR)IF1632_Stack32_base + \
71 ((DWORD)(ptr) - (DWORD)PTR_SEG_TO_LIN(IF1632_Stack32_base)))
73 #define CURRENT_STACK16 error.error
75 #define MAKE_SEGPTR(ptr) (ptr)
78 #endif /* WINE_STACKFRAME_H */