PROTECTION
addr = mmap(ADDR, LENGTH, PROTECTION, FLAGS, 0, 0);
addr = mmap(NULL, LENGTH, PROTECTION, MAP_SHARED, fd, 0);
void *haddr = mmap((void *)suggested_addr, length, PROTECTION,
void *daddr = mmap((void *)suggested_addr, length, PROTECTION,
mmap((void *)suggested_addr, length, PROTECTION, FLAGS, -1, 0);
addr = mmap(NULL, length, PROTECTION, flags, -1, 0);