loader/ldt.c

   1 #ifndef WINELIB
   2 /*
   3 static char RCSId[] = "$Id: ldt.c,v 1.2 1993/07/04 04:04:21 root Exp root $";
   4 static char Copyright[] = "Copyright  Robert J. Amstadt, 1993";
   5 */
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <errno.h>
  10 #include "prototypes.h"
  11
  12 #if defined(__NetBSD__) || defined(__FreeBSD__)
  13 #include <machine/segments.h>
  14 #endif
  15
  16 /**********************************************************************
  17  *                                      print_ldt
  18  */
  19 /* XXX These are *real* 386 descriptors !! */
  20 void
  21 print_ldt()
  22 {
  23     char buffer[0x10000];
  24     unsigned long *lp;
  25     unsigned long base_addr, limit;
  26     int type, dpl, i;
  27 #if defined(__NetBSD__) || defined(__FreeBSD__)
  28     struct segment_descriptor *sd;
  29 #endif
  30
  31     if (get_ldt(buffer) < 0)
  32         exit(1);
  33
  34     lp = (unsigned long *) buffer;
  35 #if defined(__NetBSD__) || defined(__FreeBSD__)
  36     sd = (struct segment_descriptor *) buffer;
  37 #endif
  38
  39     for (i = 0; i < 32; i++, lp++)
  40     {
  41         /* First 32 bits of descriptor */
  42         base_addr = (*lp >> 16) & 0x0000FFFF;
  43         limit = *lp & 0x0000FFFF;
  44         lp++;
  45
  46         /* First 32 bits of descriptor */
  47         base_addr |= (*lp & 0xFF000000) | ((*lp << 16) & 0x00FF0000);
  48         limit |= (*lp & 0x000F0000);
  49 #ifdef linux
  50         type = (*lp >> 10) & 5;
  51         dpl = (*lp >> 13) & 3;
  52 #endif
  53 #if defined(__NetBSD__) || defined(__FreeBSD__)
  54         type = sd->sd_type;
  55         dpl = sd->sd_dpl;
  56         sd++;
  57 #endif
  58         if (*lp & 1000)
  59         {
  60             printf("Entry %2d: Base %08lx, Limit %05lx, DPL %d, Type %d\n",
  61                    i, base_addr, limit, dpl, type);
  62             printf("          ");
  63             if (*lp & 0x100)
  64                 printf("Accessed, ");
  65             if (*lp & 8000)
  66                 printf("Present, ");
  67             if (*lp & 0x100000)
  68                 printf("User, ");
  69             if (*lp & 0x200000)
  70                 printf("X, ");
  71             if (*lp & 0x400000)
  72                 printf("32, ");
  73             else
  74                 printf("16, ");
  75             if (*lp & 0x800000)
  76                 printf("page limit, ");
  77             else
  78                 printf("byte limit, ");
  79             printf("\n");
  80             printf("          %08lx %08lx\n", *(lp), *(lp-1));
  81         }
  82         else
  83         {
  84             printf("Entry %2d: Base %08lx, Limit %05lx, DPL %d, Type %d\n",
  85                    i, base_addr, limit, dpl, type);
  86             printf("          SYSTEM: %08lx %08lx\n", *lp, *(lp-1));
  87         }
  88     }
  89 }
  90
  91 #endif /* ifndef WINELIB */