1 /*
2 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/
31 *
32 */
33 /* $Id: f00f.c,v 1.5 2008/04/24 06:36:14 subrata_modak Exp $ */
34 /*
35 * This is a simple test for handling of the pentium f00f bug.
36 * It is an example of a catistrophic test case. If the system
37 * doesn't correctly handle this test, it will likely lockup.
38 */
39 #include <signal.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include "test.h"
43
44 char *TCID = "f00f";
45 int TST_TOTAL = 1;
46
47 #ifdef __i386__
48
sigill(int sig)49 void sigill(int sig)
50 {
51 tst_resm(TPASS, "SIGILL received from f00f instruction. Good.");
52 tst_exit();
53 }
54
main(void)55 int main(void)
56 {
57 signal(SIGILL, sigill);
58 tst_resm(TINFO, "Testing for proper f00f instruction handling.");
59
60 /*
61 * an f00f instruction
62 */
63 asm volatile (".byte 0xf0\n"
64 ".byte 0x0f\n" ".byte 0xc7\n" ".byte 0xc8\n");
65
66 /*
67 * we shouldn't get here, the f00f instruction should trigger
68 * a SIGILL or lock the system.
69 */
70 tst_brkm(TFAIL, NULL,
71 "f00f instruction did not properly cause SIGILL");
72 }
73
74 #else /* __i386__ */
75
main(void)76 int main(void)
77 {
78 tst_brkm(TCONF, NULL, "f00f bug test only for i386");
79 }
80
81 #endif /* __i386__ */
82