1 /* $NetBSD: kern_sig_43.c,v 1.16 2001/11/13 02:08:01 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: kern_sig_43.c,v 1.16 2001/11/13 02:08:01 lukem Exp $"); 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_compat_netbsd.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/signalvar.h> 48 #include <sys/resourcevar.h> 49 #include <sys/namei.h> 50 #include <sys/vnode.h> 51 #include <sys/proc.h> 52 #include <sys/systm.h> 53 #include <sys/timeb.h> 54 #include <sys/times.h> 55 #include <sys/buf.h> 56 #include <sys/acct.h> 57 #include <sys/file.h> 58 #include <sys/kernel.h> 59 #include <sys/wait.h> 60 #include <sys/ktrace.h> 61 #include <sys/syslog.h> 62 #include <sys/stat.h> 63 #include <sys/core.h> 64 65 #include <sys/mount.h> 66 #include <sys/syscallargs.h> 67 68 #include <machine/cpu.h> 69 70 #include <sys/user.h> /* for coredump */ 71 72 void compat_43_sigmask_to_sigset __P((const int *, sigset_t *)); 73 void compat_43_sigset_to_sigmask __P((const sigset_t *, int *)); 74 void compat_43_sigvec_to_sigaction __P((const struct sigvec *, struct sigaction *)); 75 void compat_43_sigaction_to_sigvec __P((const struct sigaction *, struct sigvec *)); 76 void compat_43_sigstack_to_sigaltstack __P((const struct sigstack *, struct sigaltstack *)); 77 void compat_43_sigaltstack_to_sigstack __P((const struct sigaltstack *, struct sigstack *)); 78 79 void 80 compat_43_sigmask_to_sigset(sm, ss) 81 const int *sm; 82 sigset_t *ss; 83 { 84 85 ss->__bits[0] = *sm; 86 ss->__bits[1] = 0; 87 ss->__bits[2] = 0; 88 ss->__bits[3] = 0; 89 } 90 91 void 92 compat_43_sigset_to_sigmask(ss, sm) 93 const sigset_t *ss; 94 int *sm; 95 { 96 97 *sm = ss->__bits[0]; 98 } 99 100 void 101 compat_43_sigvec_to_sigaction(sv, sa) 102 const struct sigvec *sv; 103 struct sigaction *sa; 104 { 105 sa->sa_handler = sv->sv_handler; 106 compat_43_sigmask_to_sigset(&sv->sv_mask, &sa->sa_mask); 107 sa->sa_flags = sv->sv_flags ^ SA_RESTART; 108 } 109 110 void 111 compat_43_sigaction_to_sigvec(sa, sv) 112 const struct sigaction *sa; 113 struct sigvec *sv; 114 { 115 sv->sv_handler = sa->sa_handler; 116 compat_43_sigset_to_sigmask(&sa->sa_mask, &sv->sv_mask); 117 sv->sv_flags = sa->sa_flags ^ SA_RESTART; 118 } 119 120 void 121 compat_43_sigstack_to_sigaltstack(ss, sa) 122 const struct sigstack *ss; 123 struct sigaltstack *sa; 124 { 125 sa->ss_sp = ss->ss_sp; 126 sa->ss_size = SIGSTKSZ; /* Use the recommended size */ 127 sa->ss_flags = 0; 128 if (ss->ss_onstack) 129 sa->ss_flags |= SS_ONSTACK; 130 } 131 132 void 133 compat_43_sigaltstack_to_sigstack(sa, ss) 134 const struct sigaltstack *sa; 135 struct sigstack *ss; 136 { 137 ss->ss_sp = sa->ss_sp; 138 if (sa->ss_flags & SS_ONSTACK) 139 ss->ss_onstack = 1; 140 else 141 ss->ss_onstack = 0; 142 } 143 144 int 145 compat_43_sys_sigblock(p, v, retval) 146 struct proc *p; 147 void *v; 148 register_t *retval; 149 { 150 struct compat_43_sys_sigblock_args /* { 151 syscallarg(int) mask; 152 } */ *uap = v; 153 int nsm, osm; 154 sigset_t nss, oss; 155 int error; 156 157 nsm = SCARG(uap, mask); 158 compat_43_sigmask_to_sigset(&nsm, &nss); 159 error = sigprocmask1(p, SIG_BLOCK, &nss, &oss); 160 if (error) 161 return (error); 162 compat_43_sigset_to_sigmask(&oss, &osm); 163 *retval = osm; 164 return (0); 165 } 166 167 int 168 compat_43_sys_sigsetmask(p, v, retval) 169 struct proc *p; 170 void *v; 171 register_t *retval; 172 { 173 struct compat_43_sys_sigsetmask_args /* { 174 syscallarg(int) mask; 175 } */ *uap = v; 176 int nsm, osm; 177 sigset_t nss, oss; 178 int error; 179 180 nsm = SCARG(uap, mask); 181 compat_43_sigmask_to_sigset(&nsm, &nss); 182 error = sigprocmask1(p, SIG_SETMASK, &nss, &oss); 183 if (error) 184 return (error); 185 compat_43_sigset_to_sigmask(&oss, &osm); 186 *retval = osm; 187 return (0); 188 } 189 190 /* ARGSUSED */ 191 int 192 compat_43_sys_sigstack(p, v, retval) 193 struct proc *p; 194 void *v; 195 register_t *retval; 196 { 197 struct compat_43_sys_sigstack_args /* { 198 syscallarg(struct sigstack *) nss; 199 syscallarg(struct sigstack *) oss; 200 } */ *uap = v; 201 struct sigstack nss, oss; 202 struct sigaltstack nsa, osa; 203 int error; 204 205 if (SCARG(uap, nss)) { 206 error = copyin(SCARG(uap, nss), &nss, sizeof(nss)); 207 if (error) 208 return (error); 209 compat_43_sigstack_to_sigaltstack(&nss, &nsa); 210 } 211 error = sigaltstack1(p, 212 SCARG(uap, nss) ? &nsa : 0, SCARG(uap, oss) ? &osa : 0); 213 if (error) 214 return (error); 215 if (SCARG(uap, oss)) { 216 compat_43_sigaltstack_to_sigstack(&osa, &oss); 217 error = copyout(&oss, SCARG(uap, oss), sizeof(oss)); 218 if (error) 219 return (error); 220 } 221 return (0); 222 } 223 224 /* 225 * Generalized interface signal handler, 4.3-compatible. 226 */ 227 /* ARGSUSED */ 228 int 229 compat_43_sys_sigvec(p, v, retval) 230 struct proc *p; 231 void *v; 232 register_t *retval; 233 { 234 struct compat_43_sys_sigvec_args /* { 235 syscallarg(int) signum; 236 syscallarg(const struct sigvec *) nsv; 237 syscallarg(struct sigvec *) osv; 238 } */ *uap = v; 239 struct sigvec nsv, osv; 240 struct sigaction nsa, osa; 241 int error; 242 243 if (SCARG(uap, nsv)) { 244 error = copyin(SCARG(uap, nsv), &nsv, sizeof(nsv)); 245 if (error) 246 return (error); 247 compat_43_sigvec_to_sigaction(&nsv, &nsa); 248 } 249 error = sigaction1(p, SCARG(uap, signum), 250 SCARG(uap, nsv) ? &nsa : 0, SCARG(uap, osv) ? &osa : 0); 251 if (error) 252 return (error); 253 if (SCARG(uap, osv)) { 254 compat_43_sigaction_to_sigvec(&osa, &osv); 255 error = copyout(&osv, SCARG(uap, osv), sizeof(osv)); 256 if (error) 257 return (error); 258 } 259 return (0); 260 } 261 262 263 /* ARGSUSED */ 264 int 265 compat_43_sys_killpg(p, v, retval) 266 struct proc *p; 267 void *v; 268 register_t *retval; 269 { 270 struct compat_43_sys_killpg_args /* { 271 syscallarg(int) pgid; 272 syscallarg(int) signum; 273 } */ *uap = v; 274 275 #ifdef COMPAT_09 276 SCARG(uap, pgid) = (short) SCARG(uap, pgid); 277 #endif 278 279 if ((u_int)SCARG(uap, signum) >= NSIG) 280 return (EINVAL); 281 return (killpg1(p, SCARG(uap, signum), SCARG(uap, pgid), 0)); 282 } 283