1#ifdef HAVE_CONFIG_H
2# include "config.h"
3#endif
4
5#include <stdio.h>
6#include <stdint.h>
7#include <unistd.h>
8#include <limits.h>
9#include <sys/mman.h>
10
11int
12main(void)
13{
14	const intmax_t pagesize = sysconf(_SC_PAGESIZE);
15	const unsigned long length = pagesize * 3;
16	const int fd = -1;
17	off_t offset;
18	void *addr, *p;
19
20#if ULONG_MAX > 4294967295UL
21	offset = 0xcafedeadbeef000 & -pagesize;
22	addr = (void *) (uintmax_t) (0xfacefeed000 & -pagesize);
23#else
24	offset = 0xdeadbeef000 & -pagesize;
25	addr = (void *) (unsigned int) (0xfaced000 & -pagesize);
26#endif
27
28	p = mmap(addr, length, PROT_READ | PROT_WRITE,
29		 MAP_PRIVATE | MAP_ANONYMOUS, fd, offset);
30	if (p == MAP_FAILED ||
31	    mprotect(p, length, PROT_NONE) ||
32	    munmap(p, length))
33		return 77;
34
35	if (sizeof(offset) == sizeof(int))
36		printf("(mmap2?|old_mmap)\\(%p, %lu, PROT_READ\\|PROT_WRITE, "
37		       "MAP_PRIVATE\\|MAP_ANONYMOUS, %d, %#x\\) = %p\n",
38		       addr, length, fd, (unsigned int) offset, p);
39	else
40		printf("(mmap2?|old_mmap)\\(%p, %lu, PROT_READ\\|PROT_WRITE, "
41		       "MAP_PRIVATE\\|MAP_ANONYMOUS, %d, %#jx\\) = %p\n",
42		       addr, length, fd, (uintmax_t) offset, p);
43	printf("mprotect\\(%p, %lu, PROT_NONE\\) += 0\n", p, length);
44	printf("munmap\\(%p, %lu\\) += 0\n", p, length);
45	return 0;
46}
47