loader/ldt.c

   1 #ifndef WINELIB
   2 static char RCSId[] = "$Id: ldt.c,v 1.2 1993/07/04 04:04:21 root Exp root $";
   3 static char Copyright[] = "Copyright  Robert J. Amstadt, 1993";
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <errno.h>
   8 #include "prototypes.h"
   9
  10 #if defined(__NetBSD__) || defined(__FreeBSD__)
  11 #include <machine/segments.h>
  12 #endif
  13
  14 /**********************************************************************
  15  *                                      print_ldt
  16  */
  17 /* XXX These are *real* 386 descriptors !! */
  18 void
  19 print_ldt()
  20 {
  21     char buffer[0x10000];
  22     unsigned long *lp;
  23     unsigned long base_addr, limit;
  24     int type, dpl, i;
  25 #if defined(__NetBSD__) || defined(__FreeBSD__)
  26     struct segment_descriptor *sd;
  27 #endif
  28
  29     if (get_ldt(buffer) < 0)
  30         exit(1);
  31
  32     lp = (unsigned long *) buffer;
  33 #if defined(__NetBSD__) || defined(__FreeBSD__)
  34     sd = (struct segment_descriptor *) buffer;
  35 #endif
  36
  37     for (i = 0; i < 32; i++, lp++)
  38     {
  39         /* First 32 bits of descriptor */
  40         base_addr = (*lp >> 16) & 0x0000FFFF;
  41         limit = *lp & 0x0000FFFF;
  42         lp++;
  43
  44         /* First 32 bits of descriptor */
  45         base_addr |= (*lp & 0xFF000000) | ((*lp << 16) & 0x00FF0000);
  46         limit |= (*lp & 0x000F0000);
  47 #ifdef linux
  48         type = (*lp >> 10) & 5;
  49         dpl = (*lp >> 13) & 3;
  50 #endif
  51 #if defined(__NetBSD__) || defined(__FreeBSD__)
  52         type = sd->sd_type;
  53         dpl = sd->sd_dpl;
  54         sd++;
  55 #endif
  56         if (*lp & 1000)
  57         {
  58             printf("Entry %2d: Base %08.8x, Limit %05.5x, DPL %d, Type %d\n",
  59                    i, base_addr, limit, dpl, type);
  60             printf("          ");
  61             if (*lp & 0x100)
  62                 printf("Accessed, ");
  63             if (*lp & 8000)
  64                 printf("Present, ");
  65             if (*lp & 0x100000)
  66                 printf("User, ");
  67             if (*lp & 0x200000)
  68                 printf("X, ");
  69             if (*lp & 0x400000)
  70                 printf("32, ");
  71             else
  72                 printf("16, ");
  73             if (*lp & 0x800000)
  74                 printf("page limit, ");
  75             else
  76                 printf("byte limit, ");
  77             printf("\n");
  78             printf("          %08.8x %08.8x\n", *(lp), *(lp-1));
  79         }
  80         else
  81         {
  82             printf("Entry %2d: Base %08.8x, Limit %05.5x, DPL %d, Type %d\n",
  83                    i, base_addr, limit, dpl, type);
  84             printf("          SYSTEM: %08.8x %08.8x\n", *lp, *(lp-1));
  85         }
  86     }
  87 }
  88
  89 #endif /* ifndef WINELIB */