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 <stdint.h>
34 #include <unistd.h>
35 #include <limits.h>
36 #include <sys/mman.h>
37
38 int
main(void)39 main(void)
40 {
41 const intmax_t pagesize = sysconf(_SC_PAGESIZE);
42 const unsigned long length = pagesize * 3;
43 const int fd = -1;
44 off_t offset;
45 void *addr, *p;
46
47 #if ULONG_MAX > 4294967295UL
48 offset = 0xcafedeadbeef000 & -pagesize;
49 addr = (void *) (uintmax_t) (0xfacefeed000 & -pagesize);
50 #else
51 offset = 0xdeadbeef000 & -pagesize;
52 addr = (void *) (unsigned int) (0xfaced000 & -pagesize);
53 #endif
54
55 p = mmap(addr, length, PROT_READ | PROT_WRITE,
56 MAP_PRIVATE | MAP_ANONYMOUS, fd, offset);
57 if (p == MAP_FAILED ||
58 mprotect(p, length, PROT_NONE) ||
59 munmap(p, length))
60 return 77;
61
62 if (sizeof(offset) == sizeof(int))
63 printf("mmap2?\\(%p, %lu, PROT_READ\\|PROT_WRITE, "
64 "MAP_PRIVATE\\|MAP_ANONYMOUS, %d, %#x\\) = %p\n",
65 addr, length, fd, (unsigned int) offset, p);
66 else
67 printf("(mmap2?|old_mmap)\\(%p, %lu, PROT_READ\\|PROT_WRITE, "
68 "MAP_PRIVATE\\|MAP_ANONYMOUS, %d, %#jx\\) = %p\n",
69 addr, length, fd, (uintmax_t) offset, p);
70 printf("mprotect\\(%p, %lu, PROT_NONE\\) += 0\n", p, length);
71 printf("munmap\\(%p, %lu\\) += 0\n", p, length);
72 return 0;
73 }
74