include/stackframe.h

   1 /*
   2  * 16-bit and 32-bit mode stack frame layout
   3  *
   4  * Copyright 1995, 1998 Alexandre Julliard
   5  */
   6
   7 #ifndef __WINE_STACKFRAME_H
   8 #define __WINE_STACKFRAME_H
   9
  10 #include <string.h>
  11 #include "windows.h"
  12 #include "ldt.h"
  13 #include "thread.h"
  14
  15 #pragma pack(1)
  16
  17   /* 32-bit stack layout after CallTo16() */
  18 typedef struct _STACK32FRAME
  19 {
  20     SEGPTR  frame16;        /* 00 16-bit frame from last CallFrom16() */
  21     DWORD   restore_addr;   /* 04 return address for restoring code selector */
  22     DWORD   codeselector;   /* 08 code selector to restore */
  23     DWORD   edi;            /* 0c saved registers */
  24     DWORD   esi;            /* 10 */
  25     DWORD   edx;            /* 14 */
  26     DWORD   ecx;            /* 18 */
  27     DWORD   ebx;            /* 1c */
  28     DWORD   ebp;            /* 20 saved 32-bit frame pointer */
  29     DWORD   retaddr;        /* 24 actual return address */
  30     DWORD   args[1];        /* 28 arguments to 16-bit function */
  31 } STACK32FRAME;
  32
  33   /* 16-bit stack layout after CallFrom16() */
  34 typedef struct
  35 {
  36     STACK32FRAME *frame32;        /* 00 32-bit frame from last CallTo16() */
  37     DWORD         ebp;            /* 04 full 32-bit content of ebp */
  38     WORD          mutex_count;    /* 08 Win16Mutex recursion count */
  39     WORD          fs;             /* 0a fs */
  40     WORD          entry_ip;       /* 0c ip of entry point */
  41     WORD          ds;             /* 0e ds */
  42     WORD          entry_cs;       /* 10 cs of entry point */
  43     WORD          es;             /* 12 es */
  44     DWORD         entry_point;    /* 14 32-bit entry point to call */
  45     WORD          bp;             /* 18 16-bit bp */
  46     WORD          ip;             /* 1a return address */
  47     WORD          cs;             /* 1c */
  48 } STACK16FRAME;
  49
  50 #pragma pack(4)
  51
  52 #define THREAD_STACK16(thdb) ((STACK16FRAME*)PTR_SEG_TO_LIN((thdb)->cur_stack))
  53 #define CURRENT_STACK16      (THREAD_STACK16(THREAD_Current()))
  54 #define CURRENT_DS           (CURRENT_STACK16->ds)
  55
  56 /* varargs lists on the 16-bit stack */
  57
  58 typedef void *VA_LIST16;
  59
  60 #define __VA_ROUNDED16(type) \
  61     ((sizeof(type) + sizeof(WORD) - 1) / sizeof(WORD) * sizeof(WORD))
  62 #define VA_START16(list) ((list) = (VA_LIST16)(CURRENT_STACK16 + 1))
  63 #define VA_ARG16(list,type) \
  64     (((list) = (VA_LIST16)((char *)(list) + __VA_ROUNDED16(type))), \
  65      *((type *)(void *)((char *)(list) - __VA_ROUNDED16(type))))
  66 #define VA_END16(list) ((void)0)
  67
  68 /* Push bytes on the 16-bit stack of a thread;
  69  * return a segptr to the first pushed byte
  70  */
  71 #define STACK16_PUSH(thdb,size) \
  72  (memmove((char*)THREAD_STACK16(thdb)-(size),THREAD_STACK16(thdb), \
  73           sizeof(STACK16FRAME)), \
  74   (thdb)->cur_stack -= (size), \
  75   (SEGPTR)((thdb)->cur_stack + sizeof(STACK16FRAME)))
  76
  77 /* Pop bytes from the 16-bit stack of a thread */
  78 #define STACK16_POP(thdb,size) \
  79  (memmove((char*)THREAD_STACK16(thdb)+(size),THREAD_STACK16(thdb), \
  80           sizeof(STACK16FRAME)), \
  81   (thdb)->cur_stack += (size))
  82
  83 /* Push a DWORD on the 32-bit stack */
  84 #define STACK32_PUSH(context,val) (*--((DWORD *)ESP_reg(context)) = (val))
  85
  86 /* Pop a DWORD from the 32-bit stack */
  87 #define STACK32_POP(context) (*((DWORD *)ESP_reg(context))++)
  88
  89 /* Win32 register functions */
  90 #define REGS_ENTRYPOINT(name) void WINAPI __regs_##name( CONTEXT *context )
  91
  92 #endif /* __WINE_STACKFRAME_H */