linux_signal.c revision 46571
19313Ssos/*- 29313Ssos * Copyright (c) 1994-1995 S�ren Schmidt 39313Ssos * All rights reserved. 49313Ssos * 59313Ssos * Redistribution and use in source and binary forms, with or without 69313Ssos * modification, are permitted provided that the following conditions 79313Ssos * are met: 89313Ssos * 1. Redistributions of source code must retain the above copyright 99313Ssos * notice, this list of conditions and the following disclaimer 109313Ssos * in this position and unchanged. 119313Ssos * 2. Redistributions in binary form must reproduce the above copyright 129313Ssos * notice, this list of conditions and the following disclaimer in the 139313Ssos * documentation and/or other materials provided with the distribution. 149313Ssos * 3. The name of the author may not be used to endorse or promote products 159313Ssos * derived from this software withough specific prior written permission 169313Ssos * 179313Ssos * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 189313Ssos * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 199313Ssos * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 209313Ssos * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 219313Ssos * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 229313Ssos * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 239313Ssos * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 249313Ssos * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 259313Ssos * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 269313Ssos * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 279313Ssos * 2846571Speter * $Id: linux_signal.c,v 1.14 1998/12/21 19:21:36 sos Exp $ 299313Ssos */ 309313Ssos 319313Ssos#include <sys/param.h> 329313Ssos#include <sys/systm.h> 3312458Sbde#include <sys/sysproto.h> 349313Ssos#include <sys/proc.h> 359313Ssos#include <sys/signalvar.h> 369313Ssos 379313Ssos#include <i386/linux/linux.h> 3814331Speter#include <i386/linux/linux_proto.h> 3914331Speter#include <i386/linux/linux_util.h> 409313Ssos 419313Ssosstatic sigset_t 4214331Speterlinux_to_bsd_sigset(linux_sigset_t mask) { 4314331Speter int b, l; 449313Ssos sigset_t new = 0; 459313Ssos 4640203Sjdp for (l = 1; l < LINUX_NSIG; l++) { 4714331Speter if (mask & (1 << (l - 1))) { 4814331Speter if ((b = linux_to_bsd_signal[l])) 4914331Speter new |= (1 << (b - 1)); 5014331Speter } 5114331Speter } 529313Ssos return new; 539313Ssos} 549313Ssos 559313Ssosstatic linux_sigset_t 5614331Speterbsd_to_linux_sigset(sigset_t mask) { 5714331Speter int b, l; 589313Ssos sigset_t new = 0; 599313Ssos 6040203Sjdp for (b = 1; b < NSIG; b++) { 6114331Speter if (mask & (1 << (b - 1))) { 6214331Speter if ((l = bsd_to_linux_signal[b])) 6314331Speter new |= (1 << (l - 1)); 6414331Speter } 6514331Speter } 669313Ssos return new; 679313Ssos} 689313Ssos 6914342Speterstatic void 7014331Speterlinux_to_bsd_sigaction(linux_sigaction_t *lsa, struct sigaction *bsa) 7114331Speter{ 7214331Speter bsa->sa_mask = linux_to_bsd_sigset(lsa->sa_mask); 7314331Speter bsa->sa_handler = lsa->sa_handler; 7414331Speter bsa->sa_flags = 0; 7514331Speter if (lsa->sa_flags & LINUX_SA_NOCLDSTOP) 7614331Speter bsa->sa_flags |= SA_NOCLDSTOP; 7714331Speter if (lsa->sa_flags & LINUX_SA_ONSTACK) 7814331Speter bsa->sa_flags |= SA_ONSTACK; 7914331Speter if (lsa->sa_flags & LINUX_SA_RESTART) 8014331Speter bsa->sa_flags |= SA_RESTART; 8114331Speter if (lsa->sa_flags & LINUX_SA_ONESHOT) 8214331Speter bsa->sa_flags |= SA_RESETHAND; 8314331Speter if (lsa->sa_flags & LINUX_SA_NOMASK) 8414331Speter bsa->sa_flags |= SA_NODEFER; 8514331Speter} 869313Ssos 8714342Speterstatic void 8814331Speterbsd_to_linux_sigaction(struct sigaction *bsa, linux_sigaction_t *lsa) 8914331Speter{ 9014331Speter lsa->sa_handler = bsa->sa_handler; 9114331Speter lsa->sa_restorer = NULL; /* unsupported */ 9214331Speter lsa->sa_mask = bsd_to_linux_sigset(bsa->sa_mask); 9314331Speter lsa->sa_flags = 0; 9414331Speter if (bsa->sa_flags & SA_NOCLDSTOP) 9514331Speter lsa->sa_flags |= LINUX_SA_NOCLDSTOP; 9614331Speter if (bsa->sa_flags & SA_ONSTACK) 9714331Speter lsa->sa_flags |= LINUX_SA_ONSTACK; 9814331Speter if (bsa->sa_flags & SA_RESTART) 9914331Speter lsa->sa_flags |= LINUX_SA_RESTART; 10014331Speter if (bsa->sa_flags & SA_RESETHAND) 10114331Speter lsa->sa_flags |= LINUX_SA_ONESHOT; 10214331Speter if (bsa->sa_flags & SA_NODEFER) 10314331Speter lsa->sa_flags |= LINUX_SA_NOMASK; 10414331Speter} 10514331Speter 1069313Ssosint 10730994Sphklinux_sigaction(struct proc *p, struct linux_sigaction_args *args) 1089313Ssos{ 1099313Ssos linux_sigaction_t linux_sa; 1109313Ssos struct sigaction *nsa = NULL, *osa = NULL, bsd_sa; 11114331Speter struct sigaction_args sa; 1129313Ssos int error; 11314331Speter caddr_t sg = stackgap_init(); 1149313Ssos 1159313Ssos#ifdef DEBUG 11637950Sbde printf("Linux-emul(%ld): sigaction(%d, %p, %p)\n", 11737950Sbde (long)p->p_pid, args->sig, (void *)args->nsa, (void *)args->osa); 1189313Ssos#endif 11940203Sjdp if (args->sig <= 0 || args->sig >= LINUX_NSIG) 12040203Sjdp return EINVAL; 1219313Ssos if (args->osa) 12214331Speter osa = (struct sigaction *)stackgap_alloc(&sg, sizeof(struct sigaction)); 1239313Ssos 1249313Ssos if (args->nsa) { 12514331Speter nsa = (struct sigaction *)stackgap_alloc(&sg, sizeof(struct sigaction)); 12646571Speter error = copyin(args->nsa, &linux_sa, sizeof(linux_sigaction_t)); 12746571Speter if (error) 1289313Ssos return error; 12914331Speter linux_to_bsd_sigaction(&linux_sa, &bsd_sa); 13046571Speter error = copyout(&bsd_sa, nsa, sizeof(struct sigaction)); 13146571Speter if (error) 1329313Ssos return error; 1339313Ssos } 13412858Speter sa.signum = linux_to_bsd_signal[args->sig]; 1359313Ssos sa.nsa = nsa; 1369313Ssos sa.osa = osa; 13746571Speter error = sigaction(p, &sa); 13846571Speter if (error) 1399313Ssos return error; 1409313Ssos 1419313Ssos if (args->osa) { 14246571Speter error = copyin(osa, &bsd_sa, sizeof(struct sigaction)); 14346571Speter if (error) 1449313Ssos return error; 14514331Speter bsd_to_linux_sigaction(&bsd_sa, &linux_sa); 14646571Speter error = copyout(&linux_sa, args->osa, sizeof(linux_sigaction_t)); 14746571Speter if (error) 1489313Ssos return error; 1499313Ssos } 1509313Ssos return 0; 1519313Ssos} 1529313Ssos 15314331Speterint 15430994Sphklinux_signal(struct proc *p, struct linux_signal_args *args) 15514331Speter{ 15614331Speter caddr_t sg; 15714331Speter struct sigaction_args sa_args; 15814331Speter struct sigaction *osa, *nsa, tmpsa; 15914331Speter int error; 1609313Ssos 16114331Speter#ifdef DEBUG 16237950Sbde printf("Linux-emul(%ld): signal(%d, %p)\n", 16337950Sbde (long)p->p_pid, args->sig, (void *)args->handler); 16414331Speter#endif 16540203Sjdp if (args->sig <= 0 || args->sig >= LINUX_NSIG) 16640203Sjdp return EINVAL; 16714331Speter sg = stackgap_init(); 16814331Speter nsa = stackgap_alloc(&sg, sizeof *nsa); 16914331Speter osa = stackgap_alloc(&sg, sizeof *osa); 17014331Speter 17114331Speter tmpsa.sa_handler = args->handler; 17214331Speter tmpsa.sa_mask = (sigset_t) 0; 17314331Speter tmpsa.sa_flags = SA_RESETHAND | SA_NODEFER; 17414331Speter if ((error = copyout(&tmpsa, nsa, sizeof tmpsa))) 17514331Speter return error; 17614331Speter 17714331Speter sa_args.signum = linux_to_bsd_signal[args->sig]; 17814331Speter sa_args.osa = osa; 17914331Speter sa_args.nsa = nsa; 18030994Sphk if ((error = sigaction(p, &sa_args))) 18114331Speter return error; 18214331Speter 18314331Speter if ((error = copyin(osa, &tmpsa, sizeof *osa))) 18414331Speter return error; 18514331Speter 18630994Sphk p->p_retval[0] = (int)tmpsa.sa_handler; 18714331Speter 18814331Speter return 0; 18914331Speter} 19014331Speter 19114331Speter 1929313Ssosint 19330994Sphklinux_sigprocmask(struct proc *p, struct linux_sigprocmask_args *args) 1949313Ssos{ 1959313Ssos int error, s; 1969313Ssos sigset_t mask; 1979313Ssos sigset_t omask; 1989313Ssos 1999313Ssos#ifdef DEBUG 2009313Ssos printf("Linux-emul(%d): sigprocmask(%d, *, *)\n", p->p_pid, args->how); 2019313Ssos#endif 20214331Speter 20330994Sphk p->p_retval[0] = 0; 20414331Speter 2059313Ssos if (args->omask != NULL) { 20614331Speter omask = bsd_to_linux_sigset(p->p_sigmask); 20746571Speter error = copyout(&omask, args->omask, sizeof(sigset_t)); 20846571Speter if (error) 2099313Ssos return error; 2109313Ssos } 2119313Ssos if (!(args->mask)) 2129313Ssos return 0; 21346571Speter error = copyin(args->mask, &mask, sizeof(linux_sigset_t)); 21446571Speter if (error) 2159313Ssos return error; 2169313Ssos 21714331Speter mask = linux_to_bsd_sigset(mask); 2189313Ssos s = splhigh(); 2199313Ssos switch (args->how) { 2209313Ssos case LINUX_SIG_BLOCK: 22114331Speter p->p_sigmask |= (mask & ~sigcantmask); 2229313Ssos break; 2239313Ssos case LINUX_SIG_UNBLOCK: 2249313Ssos p->p_sigmask &= ~mask; 2259313Ssos break; 2269313Ssos case LINUX_SIG_SETMASK: 22714331Speter p->p_sigmask = (mask & ~sigcantmask); 2289313Ssos break; 2299313Ssos default: 2309313Ssos error = EINVAL; 2319313Ssos break; 2329313Ssos } 2339313Ssos splx(s); 2349313Ssos return error; 2359313Ssos} 2369313Ssos 2379313Ssosint 23830994Sphklinux_siggetmask(struct proc *p, struct linux_siggetmask_args *args) 2399313Ssos{ 2409313Ssos#ifdef DEBUG 2419313Ssos printf("Linux-emul(%d): siggetmask()\n", p->p_pid); 2429313Ssos#endif 24330994Sphk p->p_retval[0] = bsd_to_linux_sigset(p->p_sigmask); 2449313Ssos return 0; 2459313Ssos} 2469313Ssos 2479313Ssosint 24830994Sphklinux_sigsetmask(struct proc *p, struct linux_sigsetmask_args *args) 2499313Ssos{ 2509313Ssos int s; 25114331Speter sigset_t mask; 2529313Ssos 2539313Ssos#ifdef DEBUG 25438344Sbde printf("Linux-emul(%ld): sigsetmask(%08lx)\n", 25538344Sbde (long)p->p_pid, (unsigned long)args->mask); 2569313Ssos#endif 25730994Sphk p->p_retval[0] = bsd_to_linux_sigset(p->p_sigmask); 25814331Speter 25914331Speter mask = linux_to_bsd_sigset(args->mask); 2609313Ssos s = splhigh(); 26114331Speter p->p_sigmask = mask & ~sigcantmask; 2629313Ssos splx(s); 2639313Ssos return 0; 2649313Ssos} 2659313Ssos 2669313Ssosint 26730994Sphklinux_sigpending(struct proc *p, struct linux_sigpending_args *args) 2689313Ssos{ 2699313Ssos linux_sigset_t linux_sig; 2709313Ssos 2719313Ssos#ifdef DEBUG 2729313Ssos printf("Linux-emul(%d): sigpending(*)\n", p->p_pid); 2739313Ssos#endif 27414331Speter linux_sig = bsd_to_linux_sigset(p->p_siglist & p->p_sigmask); 2759313Ssos return copyout(&linux_sig, args->mask, sizeof(linux_sig)); 2769313Ssos} 2779313Ssos 27814381Speter/* 27914381Speter * Linux has two extra args, restart and oldmask. We dont use these, 28014381Speter * but it seems that "restart" is actually a context pointer that 28114381Speter * enables the signal to happen with a different register set. 28214381Speter */ 2839313Ssosint 28430994Sphklinux_sigsuspend(struct proc *p, struct linux_sigsuspend_args *args) 2859313Ssos{ 28614331Speter struct sigsuspend_args tmp; 2879313Ssos 2889313Ssos#ifdef DEBUG 28938344Sbde printf("Linux-emul(%ld): sigsuspend(%08lx)\n", 29038344Sbde (long)p->p_pid, (unsigned long)args->mask); 2919313Ssos#endif 29214331Speter tmp.mask = linux_to_bsd_sigset(args->mask); 29330994Sphk return sigsuspend(p, &tmp); 2949313Ssos} 2959313Ssos 29614331Speterint 29730994Sphklinux_pause(struct proc *p, struct linux_pause_args *args) 29814331Speter{ 29914331Speter struct sigsuspend_args tmp; 3009313Ssos 30114331Speter#ifdef DEBUG 30214331Speter printf("Linux-emul(%d): pause()\n", p->p_pid); 30314331Speter#endif 30414331Speter tmp.mask = p->p_sigmask; 30530994Sphk return sigsuspend(p, &tmp); 30614331Speter} 30714331Speter 3089313Ssosint 30930994Sphklinux_kill(struct proc *p, struct linux_kill_args *args) 3109313Ssos{ 31112858Speter struct kill_args /* { 3129313Ssos int pid; 3139313Ssos int signum; 31412858Speter } */ tmp; 3159313Ssos 3169313Ssos#ifdef DEBUG 3179313Ssos printf("Linux-emul(%d): kill(%d, %d)\n", 3189313Ssos p->p_pid, args->pid, args->signum); 3199313Ssos#endif 32041986Ssos if (args->signum < 0 || args->signum >= LINUX_NSIG) 32140203Sjdp return EINVAL; 3229313Ssos tmp.pid = args->pid; 3239313Ssos tmp.signum = linux_to_bsd_signal[args->signum]; 32430994Sphk return kill(p, &tmp); 3259313Ssos} 326