/*      $OpenBSD: sigprocmask.S,v 1.5 2023/12/10 16:45:52 deraadt Exp $ */
/*
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <machine/asm.h>

#include "SYS.h"

/*
 * sigprocmask(int how, sigset_t *set, sigset_t *oset)
 */
SYSENTRY_HIDDEN(sigprocmask)
        brnz,a  %o1, 1f         /* if (set != NULL) */
         ld     [%o1], %o1      /*    replace it in %o1 with *set */
/*      clr     %o1              * else block no signals ... */
        mov     1, %o0          /* ... using sigprocmask(SIG_BLOCK) */
1:
        mov     SYS_sigprocmask, %g1
99:     t       ST_SYSCALL
        PINSYSCALL(SYS_sigprocmask, 99b)
        bcc     2f              /* if success, */
         tst    %o2             /*    check to see if oset requested */
        ERROR()
2:
        bne,a   3f              /* if oset != NULL, */
         st     %o0, [%o2]      /*    *oset = oldmask */
3:
        retl                    /* in any case, return 0 */
         clr    %o0
SYSCALL_END_HIDDEN(sigprocmask)