1 /*
2 * Check decoding of prctl PR_GET_TSC/PR_SET_TSC operations.
3 *
4 * Copyright (c) 2016 JingPiao Chen <chenjingpiao@foxmail.com>
5 * Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
6 * Copyright (c) 2016-2017 The strace developers.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "tests.h"
33 #include <asm/unistd.h>
34 #include <linux/prctl.h>
35
36 #if defined __NR_prctl && defined PR_GET_TSC && defined PR_SET_TSC
37
38 # include <stdio.h>
39 # include <unistd.h>
40
41 int
main(void)42 main(void)
43 {
44 static const kernel_ulong_t bogus_tsc =
45 (kernel_ulong_t) 0xdeadc0defacebeefULL;
46
47 TAIL_ALLOC_OBJECT_CONST_PTR(int, tsc);
48 long rc;
49
50 rc = syscall(__NR_prctl, PR_SET_TSC, 0);
51 printf("prctl(PR_SET_TSC, 0 /* PR_TSC_??? */) = %s\n", sprintrc(rc));
52
53 rc = syscall(__NR_prctl, PR_SET_TSC, bogus_tsc);
54 printf("prctl(PR_SET_TSC, %#x /* PR_TSC_??? */) = %s\n",
55 (unsigned int) bogus_tsc, sprintrc(rc));
56
57 rc = syscall(__NR_prctl, PR_SET_TSC, PR_TSC_SIGSEGV);
58 printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV) = %s\n", sprintrc(rc));
59
60 rc = syscall(__NR_prctl, PR_GET_TSC, NULL);
61 printf("prctl(PR_GET_TSC, NULL) = %s\n", sprintrc(rc));
62
63 rc = syscall(__NR_prctl, PR_GET_TSC, tsc + 1);
64 printf("prctl(PR_GET_TSC, %p) = %s\n", tsc + 1, sprintrc(rc));
65
66 rc = syscall(__NR_prctl, PR_GET_TSC, tsc);
67 if (rc)
68 printf("prctl(PR_GET_TSC, %p) = %s\n", tsc, sprintrc(rc));
69 else
70 printf("prctl(PR_GET_TSC, [PR_TSC_SIGSEGV]) = %s\n",
71 sprintrc(rc));
72
73 puts("+++ exited with 0 +++");
74 return 0;
75 }
76
77 #else
78
79 SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_TSC && PR_SET_TSC")
80
81 #endif
82