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
11 int
main(void)12 main(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