1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* Check decoding of prctl PR_GET_TSC/PR_SET_TSC operations.
*
* Copyright (c) 2016 JingPiao Chen <chenjingpiao@foxmail.com>
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <linux/prctl.h>
#if defined __NR_prctl && defined PR_GET_TSC && defined PR_SET_TSC
# include <stdio.h>
# include <unistd.h>
int
main(void)
{
static const kernel_ulong_t bogus_tsc =
(kernel_ulong_t) 0xdeadc0defacebeefULL;
TAIL_ALLOC_OBJECT_CONST_PTR(int, tsc);
long rc;
rc = syscall(__NR_prctl, PR_SET_TSC, 0);
printf("prctl(PR_SET_TSC, 0 /* PR_TSC_??? */) = %s\n", sprintrc(rc));
rc = syscall(__NR_prctl, PR_SET_TSC, bogus_tsc);
printf("prctl(PR_SET_TSC, %#x /* PR_TSC_??? */) = %s\n",
(unsigned int) bogus_tsc, sprintrc(rc));
rc = syscall(__NR_prctl, PR_SET_TSC, PR_TSC_SIGSEGV);
printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV) = %s\n", sprintrc(rc));
rc = syscall(__NR_prctl, PR_GET_TSC, NULL);
printf("prctl(PR_GET_TSC, NULL) = %s\n", sprintrc(rc));
rc = syscall(__NR_prctl, PR_GET_TSC, tsc + 1);
printf("prctl(PR_GET_TSC, %p) = %s\n", tsc + 1, sprintrc(rc));
rc = syscall(__NR_prctl, PR_GET_TSC, tsc);
if (rc)
printf("prctl(PR_GET_TSC, %p) = %s\n", tsc, sprintrc(rc));
else
printf("prctl(PR_GET_TSC, [PR_TSC_SIGSEGV]) = %s\n",
sprintrc(rc));
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_TSC && PR_SET_TSC")
#endif
|
