include/ldt.h

   1 /*
   2  * LDT copy
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  */
   6
   7 #ifndef __WINE_LDT_H
   8 #define __WINE_LDT_H
   9
  10 #include "windef.h"
  11 #include "wine/library.h"
  12
  13 #define __AHSHIFT  3  /* don't change! */
  14 #define __AHINCR   (1 << __AHSHIFT)
  15
  16 /* Convert a segmented ptr (16:16) to a linear (32) pointer */
  17
  18 #define PTR_SEG_OFF_TO_LIN(seg,off) \
  19    ((void*)((char*)wine_ldt_copy.base[LOWORD(seg) >> __AHSHIFT] + (unsigned int)(off)))
  20 #define PTR_REAL_TO_LIN(seg,off) \
  21    ((void*)(((unsigned int)(seg) << 4) + LOWORD(off)))
  22 #define PTR_SEG_TO_LIN(ptr) \
  23    PTR_SEG_OFF_TO_LIN(SELECTOROF(ptr),OFFSETOF(ptr))
  24 #define PTR_SEG_OFF_TO_SEGPTR(seg,off) \
  25    ((SEGPTR)MAKELONG(off,seg))
  26 #define PTR_SEG_OFF_TO_HUGEPTR(seg,off) \
  27    PTR_SEG_OFF_TO_SEGPTR( (seg) + (HIWORD(off) << __AHSHIFT), LOWORD(off) )
  28
  29 #define W32S_APPLICATION() (PROCESS_Current()->flags & PDB32_WIN32S_PROC)
  30 #define W32S_OFFSET 0x10000
  31 #define W32S_APP2WINE(addr, offset) ((addr)? (DWORD)(addr) + (DWORD)(offset) : 0)
  32 #define W32S_WINE2APP(addr, offset) ((addr)? (DWORD)(addr) - (DWORD)(offset) : 0)
  33
  34 #define FIRST_LDT_ENTRY_TO_ALLOC  17
  35
  36 #define IS_SELECTOR_FREE(sel) (!(wine_ldt_copy.flags[LOWORD(sel) >> __AHSHIFT] & WINE_LDT_FLAGS_ALLOCATED))
  37
  38 /* Determine if sel is a system selector (i.e. not managed by Wine) */
  39 #define IS_SELECTOR_SYSTEM(sel) \
  40    (!((sel) & 4) || ((LOWORD(sel) >> __AHSHIFT) < FIRST_LDT_ENTRY_TO_ALLOC))
  41 #define IS_SELECTOR_32BIT(sel) \
  42    (IS_SELECTOR_SYSTEM(sel) || (wine_ldt_copy.flags[LOWORD(sel) >> __AHSHIFT] & WINE_LDT_FLAGS_32BIT))
  43
  44 #endif  /* __WINE_LDT_H */