gdb/testsuite/gdb.arch/i386-mpx-sigsegv.c

   1 /* Copyright (C) 2015-2020 Free Software Foundation, Inc.
   2
   3    Contributed by Intel Corp. <walfred.tedeschi@intel.com>
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include "x86-cpuid.h"
  19 #include <stdio.h>
  20
  21 #define OUR_SIZE    5
  22
  23 int gx[OUR_SIZE];
  24 int ga[OUR_SIZE];
  25 int gb[OUR_SIZE];
  26 int gc[OUR_SIZE];
  27 int gd[OUR_SIZE];
  28
  29 unsigned int
  30 have_mpx (void)
  31 {
  32   unsigned int eax, ebx, ecx, edx;
  33
  34   if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
  35     return 0;
  36
  37   if ((ecx & bit_OSXSAVE) == bit_OSXSAVE)
  38     {
  39       if (__get_cpuid_max (0, NULL) < 7)
  40         return 0;
  41
  42       __cpuid_count (7, 0, eax, ebx, ecx, edx);
  43
  44       if ((ebx & bit_MPX) == bit_MPX)
  45         return 1;
  46       else
  47         return 0;
  48     }
  49   return 0;
  50 }
  51
  52 int
  53 bp1 (int value)
  54 {
  55   return 1;
  56 }
  57
  58 int
  59 bp2 (int value)
  60 {
  61   return 1;
  62 }
  63
  64 void
  65 upper (int * p, int * a, int * b, int * c, int * d, int len)
  66 {
  67   int value;
  68   value = *(p + len);
  69   value = *(a + len);
  70   value = *(b + len);
  71   value = *(c + len);
  72   value = *(d + len);
  73 }
  74
  75 void
  76 lower (int * p, int * a, int * b, int * c, int * d, int len)
  77 {
  78   int value;
  79   value = *(p - len);
  80   value = *(a - len);
  81   value = *(b - len);
  82   value = *(c - len);
  83   bp2 (value);
  84   value = *(d - len);
  85 }
  86
  87 int
  88 main (void)
  89 {
  90   if (have_mpx ())
  91     {
  92       int sx[OUR_SIZE];
  93       int sa[OUR_SIZE];
  94       int sb[OUR_SIZE];
  95       int sc[OUR_SIZE];
  96       int sd[OUR_SIZE];
  97       int *x, *a, *b, *c, *d;
  98
  99       x = calloc (OUR_SIZE, sizeof (int));
 100       a = calloc (OUR_SIZE, sizeof (int));
 101       b = calloc (OUR_SIZE, sizeof (int));
 102       c = calloc (OUR_SIZE, sizeof (int));
 103       d = calloc (OUR_SIZE, sizeof (int));
 104
 105       upper (x, a, b, c, d, OUR_SIZE + 2);
 106       upper (sx, sa, sb, sc, sd, OUR_SIZE + 2);
 107       upper (gx, ga, gb, gc, gd, OUR_SIZE + 2);
 108       lower (x, a, b, c, d, 1);
 109       lower (sx, sa, sb, sc, sd, 1);
 110       bp1 (*x);
 111       lower (gx, ga, gb, gc, gd, 1);
 112
 113       free (x);
 114       free (a);
 115       free (b);
 116       free (c);
 117       free (d);
 118     }
 119   return 0;
 120 }