1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
31*0Sstevel@tonic-gate
32*0Sstevel@tonic-gate #include <sys/param.h>
33*0Sstevel@tonic-gate #include <sys/types.h>
34*0Sstevel@tonic-gate #include <sys/sysmacros.h>
35*0Sstevel@tonic-gate #include <sys/systm.h>
36*0Sstevel@tonic-gate #include <sys/errno.h>
37*0Sstevel@tonic-gate #include <sys/proc.h>
38*0Sstevel@tonic-gate #include <sys/fault.h>
39*0Sstevel@tonic-gate #include <sys/signal.h>
40*0Sstevel@tonic-gate #include <sys/siginfo.h>
41*0Sstevel@tonic-gate #include <sys/debug.h>
42*0Sstevel@tonic-gate
43*0Sstevel@tonic-gate int
sigaltstack(struct sigaltstack * ssp,struct sigaltstack * oss)44*0Sstevel@tonic-gate sigaltstack(struct sigaltstack *ssp, struct sigaltstack *oss)
45*0Sstevel@tonic-gate {
46*0Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread);
47*0Sstevel@tonic-gate struct sigaltstack ss;
48*0Sstevel@tonic-gate
49*0Sstevel@tonic-gate /*
50*0Sstevel@tonic-gate * User's oss and ss might be the same address, so copyin first and
51*0Sstevel@tonic-gate * save before copying out.
52*0Sstevel@tonic-gate */
53*0Sstevel@tonic-gate if (ssp) {
54*0Sstevel@tonic-gate if (lwp->lwp_sigaltstack.ss_flags & SS_ONSTACK)
55*0Sstevel@tonic-gate return (set_errno(EPERM));
56*0Sstevel@tonic-gate if (copyin(ssp, &ss, sizeof (ss)))
57*0Sstevel@tonic-gate return (set_errno(EFAULT));
58*0Sstevel@tonic-gate if (ss.ss_flags & ~SS_DISABLE)
59*0Sstevel@tonic-gate return (set_errno(EINVAL));
60*0Sstevel@tonic-gate if (!(ss.ss_flags & SS_DISABLE) && ss.ss_size < MINSIGSTKSZ)
61*0Sstevel@tonic-gate return (set_errno(ENOMEM));
62*0Sstevel@tonic-gate }
63*0Sstevel@tonic-gate
64*0Sstevel@tonic-gate if (oss) {
65*0Sstevel@tonic-gate if (copyout(&lwp->lwp_sigaltstack,
66*0Sstevel@tonic-gate oss, sizeof (struct sigaltstack)))
67*0Sstevel@tonic-gate return (set_errno(EFAULT));
68*0Sstevel@tonic-gate }
69*0Sstevel@tonic-gate
70*0Sstevel@tonic-gate if (ssp)
71*0Sstevel@tonic-gate lwp->lwp_sigaltstack = ss;
72*0Sstevel@tonic-gate
73*0Sstevel@tonic-gate return (0);
74*0Sstevel@tonic-gate }
75*0Sstevel@tonic-gate
76*0Sstevel@tonic-gate #ifdef _LP64
77*0Sstevel@tonic-gate int
sigaltstack32(struct sigaltstack32 * ssp,struct sigaltstack32 * oss)78*0Sstevel@tonic-gate sigaltstack32(struct sigaltstack32 *ssp, struct sigaltstack32 *oss)
79*0Sstevel@tonic-gate {
80*0Sstevel@tonic-gate klwp_t *lwp = ttolwp(curthread);
81*0Sstevel@tonic-gate struct sigaltstack *ss;
82*0Sstevel@tonic-gate struct sigaltstack32 ss32, oss32;
83*0Sstevel@tonic-gate
84*0Sstevel@tonic-gate /*
85*0Sstevel@tonic-gate * User's oss and ss might be the same address, so copyin first and
86*0Sstevel@tonic-gate * save before copying out.
87*0Sstevel@tonic-gate */
88*0Sstevel@tonic-gate if (ssp) {
89*0Sstevel@tonic-gate if (lwp->lwp_sigaltstack.ss_flags & SS_ONSTACK)
90*0Sstevel@tonic-gate return (set_errno(EPERM));
91*0Sstevel@tonic-gate if (copyin(ssp, &ss32, sizeof (ss32)))
92*0Sstevel@tonic-gate return (set_errno(EFAULT));
93*0Sstevel@tonic-gate if (ss32.ss_flags & ~SS_DISABLE)
94*0Sstevel@tonic-gate return (set_errno(EINVAL));
95*0Sstevel@tonic-gate if (!(ss32.ss_flags & SS_DISABLE) && ss32.ss_size < MINSIGSTKSZ)
96*0Sstevel@tonic-gate return (set_errno(ENOMEM));
97*0Sstevel@tonic-gate }
98*0Sstevel@tonic-gate
99*0Sstevel@tonic-gate if (oss) {
100*0Sstevel@tonic-gate /*
101*0Sstevel@tonic-gate * copy to ILP32 struct before copyout.
102*0Sstevel@tonic-gate */
103*0Sstevel@tonic-gate ss = &lwp->lwp_sigaltstack;
104*0Sstevel@tonic-gate oss32.ss_sp = (caddr32_t)(uintptr_t)ss->ss_sp;
105*0Sstevel@tonic-gate oss32.ss_size = (size32_t)ss->ss_size;
106*0Sstevel@tonic-gate oss32.ss_flags = ss->ss_flags;
107*0Sstevel@tonic-gate
108*0Sstevel@tonic-gate if (copyout(&oss32, oss, sizeof (oss32)))
109*0Sstevel@tonic-gate return (set_errno(EFAULT));
110*0Sstevel@tonic-gate }
111*0Sstevel@tonic-gate
112*0Sstevel@tonic-gate if (ssp) {
113*0Sstevel@tonic-gate ss = &lwp->lwp_sigaltstack;
114*0Sstevel@tonic-gate ss->ss_sp = (void *)(uintptr_t)ss32.ss_sp;
115*0Sstevel@tonic-gate ss->ss_size = (size_t)ss32.ss_size;
116*0Sstevel@tonic-gate ss->ss_flags = ss32.ss_flags;
117*0Sstevel@tonic-gate }
118*0Sstevel@tonic-gate
119*0Sstevel@tonic-gate return (0);
120*0Sstevel@tonic-gate }
121*0Sstevel@tonic-gate #endif /* _LP64 */
122