exit1
exit1(td, args->rval, 0);
exit1(td, args->error_code, 0);
exit1(td, 0, SIGABRT);
exit1(td, uap->rval, 0);
exit1(td, 0, SIGKILL);
exit1(td, ecode, 0);
exit1(td, 0, sig);
void exit1(struct thread *, int, int) __dead2;