011d4d5f44
* struct sigacts gets a new sigact_sigdesc structure, which has the sigaction and the trampoline/version. Version 0 means "legacy kernel provided trampoline". Other versions are coordinated with machine- dependent code in libc. * sigaction1() grows two more arguments -- the trampoline pointer and the trampoline version. * A new __sigaction_sigtramp() system call is provided to register a trampoline along with a signal handler. * The handler is no longer passed to sensig() functions. Instead, sendsig() looks up the handler by peeking in the sigacts for the process getting the signal (since it has to look in there for the trampoline anyway). * Native sendsig() functions now select the appropriate trampoline and its arguments based on the trampoline version in the sigacts. Changes to libc to use the new facility will be checked in later. Kernel version not bumped; we will ride the 1.6C bump made recently.
284 lines
7.2 KiB
C
284 lines
7.2 KiB
C
/* $NetBSD: kern_sig_43.c,v 1.17 2002/07/04 23:32:09 thorpej Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kern_sig_43.c,v 1.17 2002/07/04 23:32:09 thorpej Exp $");
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#if defined(_KERNEL_OPT)
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#include "opt_compat_netbsd.h"
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#endif
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#include <sys/param.h>
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#include <sys/signalvar.h>
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#include <sys/resourcevar.h>
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#include <sys/namei.h>
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#include <sys/vnode.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/timeb.h>
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#include <sys/times.h>
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#include <sys/buf.h>
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#include <sys/acct.h>
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#include <sys/file.h>
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#include <sys/kernel.h>
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#include <sys/wait.h>
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#include <sys/ktrace.h>
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#include <sys/syslog.h>
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#include <sys/stat.h>
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#include <sys/core.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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#include <machine/cpu.h>
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#include <sys/user.h> /* for coredump */
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void compat_43_sigmask_to_sigset __P((const int *, sigset_t *));
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void compat_43_sigset_to_sigmask __P((const sigset_t *, int *));
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void compat_43_sigvec_to_sigaction __P((const struct sigvec *, struct sigaction *));
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void compat_43_sigaction_to_sigvec __P((const struct sigaction *, struct sigvec *));
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void compat_43_sigstack_to_sigaltstack __P((const struct sigstack *, struct sigaltstack *));
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void compat_43_sigaltstack_to_sigstack __P((const struct sigaltstack *, struct sigstack *));
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void
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compat_43_sigmask_to_sigset(sm, ss)
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const int *sm;
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sigset_t *ss;
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{
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ss->__bits[0] = *sm;
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ss->__bits[1] = 0;
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ss->__bits[2] = 0;
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ss->__bits[3] = 0;
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}
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void
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compat_43_sigset_to_sigmask(ss, sm)
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const sigset_t *ss;
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int *sm;
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{
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*sm = ss->__bits[0];
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}
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void
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compat_43_sigvec_to_sigaction(sv, sa)
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const struct sigvec *sv;
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struct sigaction *sa;
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{
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sa->sa_handler = sv->sv_handler;
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compat_43_sigmask_to_sigset(&sv->sv_mask, &sa->sa_mask);
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sa->sa_flags = sv->sv_flags ^ SA_RESTART;
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}
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void
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compat_43_sigaction_to_sigvec(sa, sv)
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const struct sigaction *sa;
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struct sigvec *sv;
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{
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sv->sv_handler = sa->sa_handler;
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compat_43_sigset_to_sigmask(&sa->sa_mask, &sv->sv_mask);
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sv->sv_flags = sa->sa_flags ^ SA_RESTART;
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}
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void
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compat_43_sigstack_to_sigaltstack(ss, sa)
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const struct sigstack *ss;
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struct sigaltstack *sa;
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{
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sa->ss_sp = ss->ss_sp;
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sa->ss_size = SIGSTKSZ; /* Use the recommended size */
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sa->ss_flags = 0;
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if (ss->ss_onstack)
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sa->ss_flags |= SS_ONSTACK;
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}
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void
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compat_43_sigaltstack_to_sigstack(sa, ss)
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const struct sigaltstack *sa;
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struct sigstack *ss;
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{
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ss->ss_sp = sa->ss_sp;
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if (sa->ss_flags & SS_ONSTACK)
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ss->ss_onstack = 1;
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else
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ss->ss_onstack = 0;
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}
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int
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compat_43_sys_sigblock(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_43_sys_sigblock_args /* {
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syscallarg(int) mask;
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} */ *uap = v;
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int nsm, osm;
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sigset_t nss, oss;
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int error;
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nsm = SCARG(uap, mask);
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compat_43_sigmask_to_sigset(&nsm, &nss);
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error = sigprocmask1(p, SIG_BLOCK, &nss, &oss);
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if (error)
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return (error);
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compat_43_sigset_to_sigmask(&oss, &osm);
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*retval = osm;
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return (0);
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}
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int
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compat_43_sys_sigsetmask(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_43_sys_sigsetmask_args /* {
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syscallarg(int) mask;
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} */ *uap = v;
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int nsm, osm;
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sigset_t nss, oss;
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int error;
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nsm = SCARG(uap, mask);
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compat_43_sigmask_to_sigset(&nsm, &nss);
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error = sigprocmask1(p, SIG_SETMASK, &nss, &oss);
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if (error)
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return (error);
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compat_43_sigset_to_sigmask(&oss, &osm);
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*retval = osm;
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return (0);
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}
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/* ARGSUSED */
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int
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compat_43_sys_sigstack(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_43_sys_sigstack_args /* {
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syscallarg(struct sigstack *) nss;
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syscallarg(struct sigstack *) oss;
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} */ *uap = v;
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struct sigstack nss, oss;
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struct sigaltstack nsa, osa;
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int error;
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if (SCARG(uap, nss)) {
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error = copyin(SCARG(uap, nss), &nss, sizeof(nss));
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if (error)
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return (error);
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compat_43_sigstack_to_sigaltstack(&nss, &nsa);
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}
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error = sigaltstack1(p,
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SCARG(uap, nss) ? &nsa : 0, SCARG(uap, oss) ? &osa : 0);
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if (error)
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return (error);
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if (SCARG(uap, oss)) {
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compat_43_sigaltstack_to_sigstack(&osa, &oss);
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error = copyout(&oss, SCARG(uap, oss), sizeof(oss));
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if (error)
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return (error);
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}
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return (0);
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}
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/*
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* Generalized interface signal handler, 4.3-compatible.
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*/
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/* ARGSUSED */
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int
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compat_43_sys_sigvec(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_43_sys_sigvec_args /* {
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syscallarg(int) signum;
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syscallarg(const struct sigvec *) nsv;
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syscallarg(struct sigvec *) osv;
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} */ *uap = v;
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struct sigvec nsv, osv;
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struct sigaction nsa, osa;
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int error;
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if (SCARG(uap, nsv)) {
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error = copyin(SCARG(uap, nsv), &nsv, sizeof(nsv));
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if (error)
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return (error);
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compat_43_sigvec_to_sigaction(&nsv, &nsa);
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}
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error = sigaction1(p, SCARG(uap, signum),
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SCARG(uap, nsv) ? &nsa : 0, SCARG(uap, osv) ? &osa : 0,
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NULL, 0);
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if (error)
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return (error);
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if (SCARG(uap, osv)) {
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compat_43_sigaction_to_sigvec(&osa, &osv);
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error = copyout(&osv, SCARG(uap, osv), sizeof(osv));
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if (error)
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return (error);
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}
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return (0);
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}
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/* ARGSUSED */
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int
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compat_43_sys_killpg(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_43_sys_killpg_args /* {
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syscallarg(int) pgid;
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syscallarg(int) signum;
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} */ *uap = v;
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#ifdef COMPAT_09
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SCARG(uap, pgid) = (short) SCARG(uap, pgid);
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#endif
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if ((u_int)SCARG(uap, signum) >= NSIG)
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return (EINVAL);
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return (killpg1(p, SCARG(uap, signum), SCARG(uap, pgid), 0));
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}
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