1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28
29#include <sys/param.h>
30#include <sys/types.h>
31#include <sys/sysmacros.h>
32#include <sys/systm.h>
33#include <sys/errno.h>
34#include <sys/proc.h>
35#include <sys/fault.h>
36#include <sys/signal.h>
37#include <sys/schedctl.h>
38#include <sys/debug.h>
39
40/* ARGSUSED4 */
41int64_t
42lwp_sigmask(int how, uint_t bits0, uint_t bits1, uint_t bits2, uint_t bits3)
43{
44	kthread_t *t = curthread;
45	proc_t *p = ttoproc(t);
46	rval_t rv;
47
48	/*
49	 * We don't need to acquire p->p_lock here;
50	 * we are manipulating thread-private data.
51	 */
52
53	schedctl_finish_sigblock(t);
54
55	bits0 &= (FILLSET0 & ~CANTMASK0);
56	bits1 &= (FILLSET1 & ~CANTMASK1);
57	bits2 &= (FILLSET2 & ~CANTMASK2);
58
59	/*
60	 * As a sop to the s10 brand, we continue to return
61	 * the first two words of the signal mask, regardless
62	 * of the value of 'how', even though libc doesn't use them.
63	 */
64	rv.r_val1 = t->t_hold.__sigbits[0];
65	rv.r_val2 = t->t_hold.__sigbits[1];
66
67	switch (how) {
68	case SIG_BLOCK:
69		t->t_hold.__sigbits[0] |= bits0;
70		t->t_hold.__sigbits[1] |= bits1;
71		t->t_hold.__sigbits[2] |= bits2;
72		break;
73	case SIG_UNBLOCK:
74		t->t_hold.__sigbits[0] &= ~bits0;
75		t->t_hold.__sigbits[1] &= ~bits1;
76		t->t_hold.__sigbits[2] &= ~bits2;
77		if (sigcheck(p, t))
78			t->t_sig_check = 1;
79		break;
80	case SIG_SETMASK:
81		t->t_hold.__sigbits[0] = bits0;
82		t->t_hold.__sigbits[1] = bits1;
83		t->t_hold.__sigbits[2] = bits2;
84		if (sigcheck(p, t))
85			t->t_sig_check = 1;
86		break;
87	}
88
89	return (rv.r_vals);
90}
91
92int
93sigprocmask(int how, sigset_t *setp, sigset_t *osetp)
94{
95	sigset_t set;
96	sigset_t oset;
97	k_sigset_t kset;
98
99	/*
100	 * User's osetp and setp might be the same address,
101	 * so copyin first and save before copying out.
102	 */
103	if (setp) {
104		switch (how) {
105		case SIG_BLOCK:
106		case SIG_UNBLOCK:
107		case SIG_SETMASK:
108			break;
109		default:
110			return (set_errno(EINVAL));
111		}
112		if (copyin((caddr_t)setp, (caddr_t)&set, sizeof (sigset_t)))
113			return (set_errno(EFAULT));
114		sigutok(&set, &kset);
115	}
116
117	if (osetp) {
118		sigktou(&curthread->t_hold, &oset);
119		if (copyout((caddr_t)&oset, (caddr_t)osetp, sizeof (sigset_t)))
120			return (set_errno(EFAULT));
121	}
122
123	if (setp) {
124		(void) lwp_sigmask(how,
125		    kset.__sigbits[0],
126		    kset.__sigbits[1],
127		    kset.__sigbits[2],
128		    0);
129	}
130
131	return (0);
132}
133