1
2
3
4
5#define _GNU_SOURCE
6#include <string.h>
7#include <stdlib.h>
8#include <stdio.h>
9#include <sys/types.h>
10#include <sys/stat.h>
11#include <unistd.h>
12#include <sys/mman.h>
13
14int main (int argc, char *argv[])
15{
16 volatile unsigned char *a;
17
18
19 a = mmap (NULL, 0x4c, PROT_READ | PROT_WRITE | PROT_EXEC,
20 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
21 if (a == NULL || a == (unsigned char *) -1)
22 abort ();
23
24 a[0] = 0xbe;
25 a[8191] = 0xef;
26 memset ((char *) a + 1, 0, 8190);
27
28 if (a[0] != 0xbe || a[8191] != 0xef)
29 abort ();
30
31 printf ("pass\n");
32 exit (0);
33}
34