include/segmem.h

   1 /* $Id: segmem.h,v 1.3 1993/07/04 04:04:21 root Exp root $
   2  */
   3 /*
   4  * Copyright  Robert J. Amstadt, 1993
   5  */
   6 #ifndef SEGMEM_H
   7 #define SEGMEM_H
   8
   9 #include "wine.h"
  10
  11 #ifdef __linux__
  12 #define HAVE_IPC
  13 #include <sys/ipc.h>
  14 #include <sys/shm.h>
  15 #endif
  16
  17 #if defined(__NetBSD__) || defined(__FreeBSD__)
  18 #define HAVE_IPC
  19 #include <sys/types.h>
  20 #include <sys/ipc.h>
  21 #include <sys/shm.h>
  22 #define SHMSEG 32     /* XXX SEMMNI /usr/src/sys/conf/param.h */
  23 #define SHM_RANGE_START       0x40000000
  24 #endif
  25
  26 /*
  27  * Array to track selector allocation.
  28  */
  29 #define SELECTOR_ISFREE         0x8000
  30 #define SELECTOR_IS32BIT        0x4000
  31 #define SELECTOR_INDEXMASK      0x0fff
  32
  33 #define __AHSHIFT 3
  34 #define __AHINCR  (1 << __AHSHIFT)
  35
  36 extern unsigned short* SelectorMap;
  37
  38 #ifdef HAVE_IPC
  39 #define SAFEMAKEPTR(s, o) ((void *)(((int) (s) << 16) | ((o) & 0xffff)))
  40 #define FIXPTR(p)         (p)
  41 #else
  42 #define SAFEMAKEPTR(s, o) \
  43   ((void*)(((int)SelectorMap[SelectorMap[(s)>>__AHSHIFT] & SELECTOR_INDEXMASK]\
  44             << (16 + __AHSHIFT)) | 0x70000 | ((o) & 0xffff)))
  45 #define FIXPTR(p)         SAFEMAKEPTR((unsigned long) (p) >> 16, (p))
  46 #endif
  47
  48 #define MAKESELECTOR(fp) ((unsigned short) (fp >> (16 + __AHSHIFT)))
  49
  50
  51 /*
  52  * Structure to hold info about each selector we create.
  53  */
  54
  55 typedef struct segment_descriptor_s
  56 {
  57     void          *base_addr;   /* Pointer to segment in flat memory    */
  58     unsigned int   length;      /* Length of segment                    */
  59     unsigned int   flags;       /* Segment flags (see neexe.h and below)*/
  60     unsigned short selector;    /* Selector used to access this segment */
  61     unsigned short owner;       /* Handle of owner program              */
  62     unsigned char  type;        /* DATA or CODE                         */
  63 #ifdef HAVE_IPC
  64     key_t          shm_key;     /* Shared memory key or -1              */
  65 #endif
  66 } SEGDESC;
  67
  68 extern int IPCCopySelector(int i_old, unsigned long new, int swap_type);
  69
  70 /*
  71  * Additional flags
  72  */
  73 #define NE_SEGFLAGS_MALLOCED    0x00010000 /* Memory allocated with malloc() */
  74
  75 /*
  76  * Global memory flags
  77  */
  78 #define GLOBAL_FLAGS_MOVEABLE           0x0002
  79 #define GLOBAL_FLAGS_ZEROINIT           0x0040
  80 #define GLOBAL_FLAGS_CODE               0x00010000
  81 #define GLOBAL_FLAGS_EXECUTEONLY        0x00020000
  82 #define GLOBAL_FLAGS_READONLY           0x00020000
  83
  84 #ifdef __ELF__
  85 #define FIRST_SELECTOR 2
  86 #define IS_16_BIT_ADDRESS(addr)  \
  87   (!(SelectorMap[(unsigned int)(addr) >> (16+__AHSHIFT)]& SELECTOR_IS32BIT))
  88 #else
  89 #define FIRST_SELECTOR  8
  90 #define IS_16_BIT_ADDRESS(addr)  \
  91      ((unsigned int)(addr) >= (((FIRST_SELECTOR << __AHSHIFT) | 7) << 16))
  92 #endif
  93
  94
  95 extern SEGDESC* Segments;
  96
  97 #endif /* SEGMEM_H */