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     DWORD   saved_ss_sp;             /* saved previous 16-bit stack */
  19     DWORD   ebp;                     /* full 32-bit content of ebp */
  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 DWORD IF1632_Saved16_ss_sp;
  50
  51   /* Saved 32-bit stack for current process (Win16 only) */
  52 extern DWORD IF1632_Saved32_esp;
  53
  54   /* Original Unix stack */
  55 extern DWORD IF1632_Original32_esp;
  56
  57 #define CURRENT_STACK16  ((STACK16FRAME *)PTR_SEG_TO_LIN(IF1632_Saved16_ss_sp))
  58
  59 #define CURRENT_DS   (CURRENT_STACK16->ds)
  60
  61 #endif /* __WINE_STACKFRAME_H */