f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers/*
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * CDDL HEADER START
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers *
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * The contents of this file are subject to the terms of the
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * Common Development and Distribution License (the "License").
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * You may not use this file except in compliance with the License.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers *
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * or http://www.opensolaris.org/os/licensing.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * See the License for the specific language governing permissions
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * and limitations under the License.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers *
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * When distributing Covered Code, include this CDDL HEADER in each
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * If applicable, add the following below this CDDL HEADER, with the
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * fields enclosed by brackets "[]" replaced with your own identifying
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * information: Portions Copyright [yyyy] [name of copyright owner]
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers *
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * CDDL HEADER END
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers/*
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * Use is subject to license terms.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/param.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/types.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/bitmap.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/sysmacros.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/systm.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/user.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/errno.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/proc.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/fault.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/procset.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/signal.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/siginfo.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/time.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/kmem.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/schedctl.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/debug.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/condvar_impl.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/model.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/sdt.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#include <sys/zone.h>
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowersstatic int
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowerscopyout_siginfo(model_t datamodel, k_siginfo_t *ksip, void *uaddr)
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers{
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers zoneid_t zoneid = getzoneid();
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (datamodel == DATAMODEL_NATIVE) {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (SI_FROMUSER(ksip) && zoneid != GLOBAL_ZONEID &&
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers zoneid != ksip->si_zoneid) {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers k_siginfo_t sani_sip = *ksip;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sani_sip.si_pid = curproc->p_zone->zone_zsched->p_pid;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sani_sip.si_uid = 0;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sani_sip.si_ctid = -1;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sani_sip.si_zoneid = zoneid;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (copyout(&sani_sip, uaddr, sizeof (sani_sip)))
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(EFAULT));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers } else {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (copyout(ksip, uaddr, sizeof (*ksip)))
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(EFAULT));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#ifdef _SYSCALL32_IMPL
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers else {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers siginfo32_t si32;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers siginfo_kto32(ksip, &si32);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (SI_FROMUSER(ksip) && zoneid != GLOBAL_ZONEID &&
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers zoneid != ksip->si_zoneid) {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers si32.si_pid = curproc->p_zone->zone_zsched->p_pid;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers si32.si_uid = 0;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers si32.si_ctid = -1;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers si32.si_zoneid = zoneid;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (copyout(&si32, uaddr, sizeof (si32)))
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(EFAULT));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers#endif
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (ksip->si_signo);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers}
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers/*
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * Wait until a signal within a specified set is posted or until the
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * time interval 'timeout' if specified. The signal is caught but
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * not delivered. The value of the signal is returned to the caller.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowersint
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowerssigtimedwait(sigset_t *setp, siginfo_t *siginfop, timespec_t *timeoutp)
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers{
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sigset_t set;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers k_sigset_t oldmask;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers kthread_t *t = curthread;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers klwp_t *lwp = ttolwp(t);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers proc_t *p = ttoproc(t);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers timespec_t sig_timeout;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers timespec_t *rqtp = NULL;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers int timecheck = 0;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers int ret;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers int error = 0;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers k_siginfo_t info, *infop;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers model_t datamodel = get_udatamodel();
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (timeoutp) {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers timespec_t now;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers timecheck = timechanged;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers gethrestime(&now);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (datamodel == DATAMODEL_NATIVE) {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (copyin(timeoutp, &sig_timeout,
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sizeof (sig_timeout)))
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(EFAULT));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers } else {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers timespec32_t timeout32;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (copyin(timeoutp, &timeout32, sizeof (timeout32)))
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(EFAULT));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers TIMESPEC32_TO_TIMESPEC(&sig_timeout, &timeout32)
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (itimerspecfix(&sig_timeout))
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(EINVAL));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers /*
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * Convert the timespec value into absolute time.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers timespecadd(&sig_timeout, &now);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers rqtp = &sig_timeout;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (copyin(setp, &set, sizeof (set)))
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(EFAULT));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sigutok(&set, &t->t_sigwait);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (sigisempty(&t->t_sigwait))
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(EINVAL));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers mutex_enter(&p->p_lock);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers /*
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * set the thread's signal mask to unmask
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * those signals in the specified set.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers schedctl_finish_sigblock(t);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers oldmask = t->t_hold;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sigdiffset(&t->t_hold, &t->t_sigwait);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers /*
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * Wait until we take a signal or until
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * the absolute future time is passed.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers while ((ret = cv_waituntil_sig(&t->t_delay_cv, &p->p_lock,
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers rqtp, timecheck)) > 0)
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers continue;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (ret == -1)
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers error = EAGAIN;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers /*
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * Restore thread's signal mask to its previous value.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers t->t_hold = oldmask;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers t->t_sig_check = 1; /* so post_syscall sees new t_hold mask */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (error) {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers mutex_exit(&p->p_lock);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sigemptyset(&t->t_sigwait);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(error)); /* timer expired */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers /*
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * Don't bother with signal if it is not in request set.
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (lwp->lwp_cursig == 0 ||
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers !sigismember(&t->t_sigwait, lwp->lwp_cursig)) {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers mutex_exit(&p->p_lock);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers /*
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * lwp_cursig is zero if pokelwps() awakened cv_wait_sig().
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * This happens if some other thread in this process called
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers * forkall() or exit().
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers */
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sigemptyset(&t->t_sigwait);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (set_errno(EINTR));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (lwp->lwp_curinfo)
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers infop = &lwp->lwp_curinfo->sq_info;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers else {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers infop = &info;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers bzero(infop, sizeof (info));
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers infop->si_signo = lwp->lwp_cursig;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers infop->si_code = SI_NOINFO;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers lwp->lwp_ru.nsignals++;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers ret = lwp->lwp_cursig;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers DTRACE_PROC2(signal__clear, int, ret, ksiginfo_t *, infop);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers lwp->lwp_cursig = 0;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers lwp->lwp_extsig = 0;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers mutex_exit(&p->p_lock);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (siginfop)
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers ret = copyout_siginfo(datamodel, infop, siginfop);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers if (lwp->lwp_curinfo) {
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers siginfofree(lwp->lwp_curinfo);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers lwp->lwp_curinfo = NULL;
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers }
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers sigemptyset(&t->t_sigwait);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers return (ret);
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers}
f9fbec18f5b458b560ecf45d3db8e8bd56bf6942mcpowers