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;    /* 00 saved previous 16-bit stack */
  19     DWORD   ebp;            /* 04 full 32-bit content of ebp */
  20     WORD    entry_ip;       /* 08 ip of entry point */
  21     WORD    ds;             /* 0a ds */
  22     WORD    entry_cs;       /* 0c cs of entry point */
  23     WORD    es;             /* 0e es */
  24     DWORD   entry_point;    /* 10 32-bit entry point to call */
  25     WORD    bp;             /* 14 16-bit bp */
  26     WORD    ip;             /* 16 return address */
  27     WORD    cs;             /* 18 */
  28     WORD    args[1];        /* 1a arguments to API function */
  29 } STACK16FRAME;
  30
  31   /* 32-bit stack layout after CallTo16() */
  32 typedef struct
  33 {
  34     DWORD   edi;            /* 00 saved registers */
  35     DWORD   esi;            /* 04 */
  36     DWORD   edx;            /* 08 */
  37     DWORD   ecx;            /* 0c */
  38     DWORD   ebx;            /* 10 */
  39     DWORD   restore_addr;   /* 14 return address for restoring code selector */
  40     DWORD   codeselector;   /* 18 code selector to restore */
  41     DWORD   ebp;            /* 1c saved 32-bit frame pointer */
  42     DWORD   retaddr;        /* 20 actual return address */
  43     DWORD   args[1];        /* 24 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 */