1/* { dg-require-effective-target mmap } */
2/* { dg-skip-if "the executable is at the same position the test tries to remap" { m68k-*-linux* } { "*" } { "" } } */
3
4#include <limits.h>
5
6#include <sys/types.h>
7#include <sys/mman.h>
8#include <sys/stat.h>
9#include <fcntl.h>
10#ifndef MAP_ANON
11#ifdef MAP_ANONYMOUS
12#define MAP_ANON MAP_ANONYMOUS
13#else
14#define MAP_ANON MAP_FILE
15#endif
16#endif
17#ifndef MAP_FILE
18#define MAP_FILE 0
19#endif
20#ifndef MAP_FIXED
21#define MAP_FIXED 0
22#endif
23
24#define MAP_START (void *)0x7fff8000
25#define MAP_LEN 0x10000
26
27#define OFFSET (MAP_LEN/2 - 2 * sizeof (char));
28
29f (int s, char *p)
30{
31  int i;
32  for (i = s; &p[i] < &p[40] && i >= 0; i++)
33    {
34      p[i] = -2;
35    }
36}
37
38main ()
39{
40#ifdef MAP_ANON
41  char *p;
42  int dev_zero;
43
44  dev_zero = open ("/dev/zero", O_RDONLY);
45  /* -1 is OK when we have MAP_ANON; else mmap will flag an error.  */
46  if (INT_MAX != 0x7fffffffL || sizeof (char *) != sizeof (int))
47    exit (0);
48  p = mmap (MAP_START, MAP_LEN, PROT_READ|PROT_WRITE,
49	    MAP_ANON|MAP_FIXED|MAP_PRIVATE, dev_zero, 0);
50  if (p != (char *)-1)
51    {
52      p += OFFSET;
53      p[39] = 0;
54      f (0, p);
55      if (p[39] != (char)-2)
56	abort ();
57      p[39] = 0;
58      f (-1, p);
59      if (p[39] != 0)
60	abort ();
61    }
62#endif
63  exit (0);
64}
65