1 /*
2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <stdio.h>
33 #include <unistd.h>
34 #include <sys/mman.h>
35 #include <sys/syscall.h>
36
37 #if defined __NR_get_robust_list && defined __NR_set_robust_list
38
39 int
main(void)40 main(void)
41 {
42 const size_t page_len = sysconf(_SC_PAGESIZE);
43 const pid_t pid = getpid();
44 const long long_pid = (unsigned long) (0xdeadbeef00000000LL | pid);
45
46 void *p = mmap(NULL, page_len * 4, PROT_READ | PROT_WRITE,
47 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
48 if (p == MAP_FAILED ||
49 mprotect(p + page_len, page_len, PROT_NONE) ||
50 mprotect(p + page_len * 3, page_len, PROT_NONE))
51 return 77;
52
53 void **p_head = p + page_len - sizeof(void *);
54 size_t *p_len = p + page_len * 3 - sizeof(size_t);
55
56 if (syscall(__NR_get_robust_list, long_pid, p_head, p_len))
57 return 77;
58 printf("get_robust_list(%d, [%#lx], [%lu]) = 0\n",
59 (int) pid, (unsigned long) *p_head, (unsigned long) *p_len);
60
61 if (syscall(__NR_set_robust_list, p, *p_len))
62 return 77;
63 printf("set_robust_list(%#lx, %lu) = 0\n",
64 (unsigned long) p, (unsigned long) *p_len);
65
66 if (syscall(__NR_get_robust_list, long_pid, p_head, p_len))
67 return 77;
68 printf("get_robust_list(%d, [%#lx], [%lu]) = 0\n",
69 (int) pid, (unsigned long) *p_head, (unsigned long) *p_len);
70
71 puts("+++ exited with 0 +++");
72 return 0;
73 }
74
75 #else
76
77 int
main(void)78 main(void)
79 {
80 return 77;
81 }
82
83 #endif
84