/*      $OpenBSD: sigprocmask.S,v 1.6 2015/10/23 04:39:24 guenther Exp $        */
/*      $NetBSD: sigprocmask.S,v 1.2 1996/10/17 03:08:21 cgd Exp $      */

/*
 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 * 
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include "SYS.h"

SYSLEAF_HIDDEN(sigprocmask, 3)
        mov     a2, a5                  /* safe */
        cmoveq  a1, 1, a0               /* if set == NULL, how = SIG_BLOCK */
        beq     a1, Ldoit               /* and set = 0, and do it. */
        ldl     a1, 0(a1)               /* load the set from *set */
Ldoit:  CALLSYS_ERROR(sigprocmask)
        beq     a5, Lret                /* if they don't want old mask, done */ 
        stl     v0, 0(a5)               /* otherwise, give it to them. */
Lret:   mov     zero, v0
        RET

SYSCALL_END_HIDDEN(sigprocmask)