1/* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * %sccs.include.redist.c% 10 * 11 * from: $Header: sigprocmask.s,v 1.1 91/07/06 13:06:01 torek Exp $ 12 */ 13 14#if defined(LIBC_SCCS) && !defined(lint) 15 .asciz "@(#)sigprocmask.s 8.1 (Berkeley) 06/04/93" 16#endif /* LIBC_SCCS and not lint */ 17 18#include "SYS.h" 19 20/* 21 * sigprocmask(int how, sigset_t *set, sigset_t *oset) 22 */ 23ENTRY(sigprocmask) 24 tst %o1 ! set == NULL? 25 bne,a 1f ! if not, 26 ld [%o1], %o1 ! replace it in %o1 with *set 27! clr %o1 ! else block no signals ... 28 mov 1, %o0 ! ... using sigprocmask(SIG_BLOCK) 291: 30 mov SYS_sigprocmask, %g1 31 t ST_SYSCALL 32 bcc 2f ! if success, 33 tst %o2 ! check to see if oset requested 34 ERROR() 352: 36 bne,a 3f ! if oset != NULL, 37 st %o0, [%o2] ! *oset = oldmask 383: 39 retl ! in any case, return 0 40 clr %o0 41