1/* $OpenBSD: sigprocmask.S,v 1.6 2015/10/23 04:39:24 guenther Exp $ */ 2/* $NetBSD: sigprocmask.S,v 1.2 1996/10/17 03:08:21 cgd Exp $ */ 3 4/* 5 * Copyright (c) 1994, 1995 Carnegie-Mellon University. 6 * All rights reserved. 7 * 8 * Author: Chris G. Demetriou 9 * 10 * Permission to use, copy, modify and distribute this software and 11 * its documentation is hereby granted, provided that both the copyright 12 * notice and this permission notice appear in all copies of the 13 * software, derivative works or modified versions, and any portions 14 * thereof, and that both notices appear in supporting documentation. 15 * 16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * Carnegie Mellon requests users of this software to return to 21 * 22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23 * School of Computer Science 24 * Carnegie Mellon University 25 * Pittsburgh PA 15213-3890 26 * 27 * any improvements or extensions that they make and grant Carnegie the 28 * rights to redistribute these changes. 29 */ 30 31#include "SYS.h" 32 33SYSLEAF_HIDDEN(sigprocmask, 3) 34 mov a2, a5 /* safe */ 35 cmoveq a1, 1, a0 /* if set == NULL, how = SIG_BLOCK */ 36 beq a1, Ldoit /* and set = 0, and do it. */ 37 ldl a1, 0(a1) /* load the set from *set */ 38Ldoit: CALLSYS_ERROR(sigprocmask) 39 beq a5, Lret /* if they don't want old mask, done */ 40 stl v0, 0(a5) /* otherwise, give it to them. */ 41Lret: mov zero, v0 42 RET 43 44SYSCALL_END_HIDDEN(sigprocmask) 45