__sys_bind
extern int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen);
ret = __sys_bind(a0, compat_ptr(a1), a[2]);
return __sys_bind(fd, umyaddr, addrlen);
err = __sys_bind(a0, (struct sockaddr __user *)a1, a[2]);
extern int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen);