exit1
exit1(p, 0, SIGABRT, EXIT_NORMAL);
exit1(p, 0, 0, EXIT_THREAD);
exit1(p, SCARG(uap, rval), 0, EXIT_NORMAL);
exit1(curproc, ecode, 0, EXIT_NORMAL);
exit1(p, 0, signum, EXIT_NORMAL);
exit1(p, 0, 0, EXIT_THREAD_NOCHECK);
__dead void exit1(struct proc *, int, int, int);