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 #ifndef WINELIB
  14 #pragma pack(1)
  15 #endif
  16
  17   /* 16-bit stack layout after CallTo32() */
  18 typedef struct
  19 {
  20     WORD    saved_ss;                /* saved previous 16-bit stack */
  21     WORD    saved_sp;
  22     WORD    es;
  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 */
  29     WORD    cs;
  30     WORD    args[1];                 /* arguments to API function */
  31 } STACK16FRAME;
  32
  33   /* 32-bit stack layout after CallTo16() */
  34 typedef struct
  35 {
  36     DWORD   saved_esp;      /* saved previous 32-bit stack */
  37     DWORD   edi;            /* saved registers */
  38     DWORD   esi;
  39     DWORD   edx;
  40     DWORD   ecx;
  41     DWORD   ebx;
  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 */
  46 } STACK32FRAME;
  47
  48 #ifndef WINELIB
  49 #pragma pack(4)
  50 #endif
  51
  52   /* Saved 16-bit stack */
  53 extern WORD IF1632_Saved16_ss;
  54 extern WORD IF1632_Saved16_sp;
  55
  56   /* Saved 32-bit stack */
  57 extern DWORD IF1632_Saved32_esp;
  58 extern SEGPTR IF1632_Stack32_base;
  59 extern DWORD IF1632_Original32_esp;
  60
  61 #ifndef WINELIB
  62 #define CURRENT_STACK16 \
  63     ((STACK16FRAME *)PTR_SEG_OFF_TO_LIN(IF1632_Saved16_ss,IF1632_Saved16_sp))
  64
  65 #define CURRENT_DS   (CURRENT_STACK16->ds)
  66
  67   /* Make a segmented pointer from a pointer to a variable located */
  68   /* on the 32-bit stack for the current task. */
  69 #if 0
  70 #define MAKE_SEGPTR(ptr) \
  71      ((SEGPTR)IF1632_Stack32_base + \
  72       ((DWORD)(ptr) - (DWORD)PTR_SEG_TO_LIN(IF1632_Stack32_base)))
  73 #endif
  74 SEGPTR MAKE_SEGPTR(void *ptr);
  75 #else
  76 #define CURRENT_STACK16 error.error
  77 #define CURRENT_DS              0
  78 #define MAKE_SEGPTR(ptr)        ((SEGPTR)ptr)
  79 #endif
  80
  81 #endif /* WINE_STACKFRAME_H */