#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>


int
main(void)
{
    int   fd, virt_size;
    void *addr;

    fd = -1;

    addr      = NULL;
    virt_size = 0x18000000;
    addr = mmap(addr, virt_size, (PROT_READ|PROT_WRITE),
		(MAP_NORESERVE|MAP_PRIVATE|MAP_ANON), fd, 0);
    if (addr == MAP_FAILED)
    {
	perror("mapping VM scratch space");
	close(fd);
	return -1;
    }

    *(volatile char *)addr;

    return 0;
}