#include <stdio.h>
#include <err.h>
#include <sys/mman.h>

int main()
{
        void *p;

        p = (void *) mmap;

        p = mmap(p,0x7f000,PROT_NONE,MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS, 0xffffffff, 0);
        if (p == MAP_FAILED)
                err(1,"mmap");

        printf("mmap = %p\n", p);

        return 0;
}