include/stackframe.h

   1 /*
   2  * 16-bit mode stack frame layout
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #ifndef __WINE_STACKFRAME_H
   8 #define __WINE_STACKFRAME_H
   9
  10 #include <windows.h>
  11 #include "ldt.h"
  12
  13 #pragma pack(1)
  14
  15   /* 16-bit stack layout after CallFrom16() */
  16 typedef struct
  17 {
  18     WORD    saved_ss;                /* saved previous 16-bit stack */
  19     WORD    saved_sp;
  20     WORD    entry_ip;                /* ip of entry point */
  21     WORD    ds;                      /* ds */
  22     WORD    entry_cs;                /* cs of entry point */
  23     WORD    es;                      /* es */
  24     DWORD   entry_point WINE_PACKED; /* 32-bit entry point to call */
  25     WORD    bp;                      /* 16-bit bp */
  26     WORD    ip;                      /* return address */
  27     WORD    cs;
  28     WORD    args[1];                 /* arguments to API function */
  29 } STACK16FRAME;
  30
  31   /* 32-bit stack layout after CallTo16() */
  32 typedef struct
  33 {
  34     DWORD   saved_esp;      /* saved previous 32-bit stack */
  35     DWORD   edi;            /* saved registers */
  36     DWORD   esi;
  37     DWORD   edx;
  38     DWORD   ecx;
  39     DWORD   ebx;
  40     DWORD   ebp;            /* saved 32-bit frame pointer */
  41     DWORD   retaddr;        /* return address */
  42     DWORD   codeselector;   /* code selector for return address */
  43     DWORD   args[1];        /* arguments to 16-bit function */
  44 } STACK32FRAME;
  45
  46 #pragma pack(4)
  47
  48   /* Saved 16-bit stack for current process (Win16 only) */
  49 extern WORD IF1632_Saved16_ss;
  50 extern WORD IF1632_Saved16_sp;
  51
  52   /* Saved 32-bit stack for current process (Win16 only) */
  53 extern DWORD IF1632_Saved32_esp;
  54 extern SEGPTR IF1632_Stack32_base;
  55
  56   /* Original Unix stack */
  57 extern DWORD IF1632_Original32_esp;
  58
  59 #define CURRENT_STACK16 \
  60     ((STACK16FRAME *)PTR_SEG_OFF_TO_LIN(IF1632_Saved16_ss,IF1632_Saved16_sp))
  61
  62 #define CURRENT_DS   (CURRENT_STACK16->ds)
  63
  64 #ifndef WINELIB
  65   /* Make a segmented pointer from a pointer to a variable located */
  66   /* on the 32-bit stack for the current task. */
  67 #if 0
  68 #define MAKE_SEGPTR(ptr) \
  69      ((SEGPTR)IF1632_Stack32_base + \
  70       ((DWORD)(ptr) - (DWORD)PTR_SEG_TO_LIN(IF1632_Stack32_base)))
  71 #endif
  72 SEGPTR MAKE_SEGPTR(void *ptr);
  73 #else
  74 #define MAKE_SEGPTR(ptr)   ((SEGPTR)ptr)
  75 #endif
  76
  77 #endif /* __WINE_STACKFRAME_H */