660 lines
16 KiB
C
660 lines
16 KiB
C
/* $NetBSD: linux_signal.c,v 1.30 2000/08/23 17:02:18 christos Exp $ */
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/*-
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* Copyright (c) 1995, 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 Frank van der Linden and Eric Haszlakiewicz.
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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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/*
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* heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp
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*/
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/*
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* Functions in multiarch:
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* linux_sys_signal : linux_sig_notalpha.c
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* linux_sys_siggetmask : linux_sig_notalpha.c
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* linux_sys_sigsetmask : linux_sig_notalpha.c
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* linux_sys_pause : linux_sig_notalpha.c
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* linux_sys_sigaction : linux_sigaction.c
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*
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*/
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/*
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* Unimplemented:
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* linux_sys_rt_sigtimedwait : sigsuspend w/timeout.
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*/
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#define COMPAT_LINUX 1
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/filedesc.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include <sys/kernel.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/malloc.h>
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#include <sys/syscallargs.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_siginfo.h>
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#include <compat/linux/common/linux_util.h>
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#include <compat/linux/linux_syscallargs.h>
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/* Locally used defines (in bsd<->linux conversion functions): */
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#define linux_sigemptyset(s) memset((s), 0, sizeof(*(s)))
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#define linux_sigismember(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \
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& (1 << ((n) - 1) % LINUX__NSIG_BPW))
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#define linux_sigaddset(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \
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|= (1 << ((n) - 1) % LINUX__NSIG_BPW))
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/* Note: linux_to_native_sig[] is in <arch>/linux_sigarray.c */
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int native_to_linux_sig[NSIG] = {
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0,
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LINUX_SIGHUP,
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LINUX_SIGINT,
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LINUX_SIGQUIT,
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LINUX_SIGILL,
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LINUX_SIGTRAP,
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LINUX_SIGABRT,
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0, /* SIGEMT */
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LINUX_SIGFPE,
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LINUX_SIGKILL,
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LINUX_SIGBUS,
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LINUX_SIGSEGV,
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0, /* SIGSYS */
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LINUX_SIGPIPE,
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LINUX_SIGALRM,
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LINUX_SIGTERM,
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LINUX_SIGURG,
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LINUX_SIGSTOP,
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LINUX_SIGTSTP,
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LINUX_SIGCONT,
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LINUX_SIGCHLD,
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LINUX_SIGTTIN,
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LINUX_SIGTTOU,
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LINUX_SIGIO,
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LINUX_SIGXCPU,
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LINUX_SIGXFSZ,
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LINUX_SIGVTALRM,
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LINUX_SIGPROF,
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LINUX_SIGWINCH,
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0, /* SIGINFO */
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LINUX_SIGUSR1,
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LINUX_SIGUSR2,
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LINUX_SIGPWR,
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};
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/*
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* Convert between Linux and BSD signal sets.
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*/
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#if LINUX__NSIG_WORDS > 1
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void
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linux_old_extra_to_native_sigset(lss, extra, bss)
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const linux_old_sigset_t *lss;
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const unsigned long *extra;
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sigset_t *bss;
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{
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linux_sigset_t lsnew;
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/* convert old sigset to new sigset */
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linux_sigemptyset(&lsnew);
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lsnew.sig[0] = *lss;
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if (extra)
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bcopy(extra, &lsnew.sig[1],
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sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t));
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linux_to_native_sigset(&lsnew, bss);
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}
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void
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native_to_linux_old_extra_sigset(bss, lss, extra)
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const sigset_t *bss;
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linux_old_sigset_t *lss;
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unsigned long *extra;
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{
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linux_sigset_t lsnew;
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native_to_linux_sigset(bss, &lsnew);
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/* convert new sigset to old sigset */
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*lss = lsnew.sig[0];
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if (extra)
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bcopy(&lsnew.sig[1], extra,
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sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t));
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}
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#endif
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void
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linux_to_native_sigset(lss, bss)
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const linux_sigset_t *lss;
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sigset_t *bss;
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{
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int i, newsig;
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sigemptyset(bss);
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for (i = 1; i < LINUX__NSIG; i++) {
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if (linux_sigismember(lss, i)) {
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newsig = linux_to_native_sig[i];
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if (newsig)
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sigaddset(bss, newsig);
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}
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}
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}
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void
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native_to_linux_sigset(bss, lss)
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const sigset_t *bss;
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linux_sigset_t *lss;
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{
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int i, newsig;
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linux_sigemptyset(lss);
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for (i = 1; i < NSIG; i++) {
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if (sigismember(bss, i)) {
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newsig = native_to_linux_sig[i];
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if (newsig)
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linux_sigaddset(lss, newsig);
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}
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}
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}
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/*
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* Convert between Linux and BSD sigaction structures. Linux sometimes
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* has one extra field (sa_restorer) which we don't support.
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*/
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void
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linux_old_to_native_sigaction(lsa, bsa)
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struct linux_old_sigaction *lsa;
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struct sigaction *bsa;
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{
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bsa->sa_handler = lsa->sa_handler;
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linux_old_to_native_sigset(&lsa->sa_mask, &bsa->sa_mask);
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bsa->sa_flags = 0;
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if ((lsa->sa_flags & LINUX_SA_NOCLDSTOP) != 0)
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bsa->sa_flags |= SA_NOCLDSTOP;
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if ((lsa->sa_flags & LINUX_SA_ONSTACK) != 0)
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bsa->sa_flags |= SA_ONSTACK;
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if ((lsa->sa_flags & LINUX_SA_RESTART) != 0)
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bsa->sa_flags |= SA_RESTART;
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if ((lsa->sa_flags & LINUX_SA_ONESHOT) != 0)
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bsa->sa_flags |= SA_RESETHAND;
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if ((lsa->sa_flags & LINUX_SA_NOMASK) != 0)
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bsa->sa_flags |= SA_NODEFER;
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if ((lsa->sa_flags & LINUX_SA_SIGINFO) != 0)
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bsa->sa_flags |= SA_SIGINFO;
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#ifdef DEBUG_LINUX
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if ((lsa->sa_flags & ~LINUX_SA_ALLBITS) != 0)
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/*XXX*/ printf("linux_old_to_native_sigaction: extra bits ignored\n");
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if (lsa->sa_restorer != 0)
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/*XXX*/ printf("linux_old_to_native_sigaction: sa_restorer ignored\n");
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#endif
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}
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void
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native_to_linux_old_sigaction(bsa, lsa)
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struct sigaction *bsa;
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struct linux_old_sigaction *lsa;
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{
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/* Clear sa_flags and sa_restorer (if it exists) */
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bzero(lsa, sizeof(struct linux_old_sigaction));
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/* ...and fill in the mask and flags */
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native_to_linux_old_sigset(&bsa->sa_mask, &lsa->sa_mask);
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if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
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lsa->sa_flags |= LINUX_SA_NOCLDSTOP;
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if ((bsa->sa_flags & SA_ONSTACK) != 0)
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lsa->sa_flags |= LINUX_SA_ONSTACK;
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if ((bsa->sa_flags & SA_RESTART) != 0)
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lsa->sa_flags |= LINUX_SA_RESTART;
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if ((bsa->sa_flags & SA_NODEFER) != 0)
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lsa->sa_flags |= LINUX_SA_NOMASK;
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if ((bsa->sa_flags & SA_RESETHAND) != 0)
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lsa->sa_flags |= LINUX_SA_ONESHOT;
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if ((bsa->sa_flags & SA_SIGINFO) != 0)
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lsa->sa_flags |= LINUX_SA_SIGINFO;
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lsa->sa_handler = bsa->sa_handler;
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}
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/* ...and the new sigaction conversion funcs. */
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void
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linux_to_native_sigaction(lsa, bsa)
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struct linux_sigaction *lsa;
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struct sigaction *bsa;
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{
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bsa->sa_handler = lsa->sa_handler;
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linux_to_native_sigset(&lsa->sa_mask, &bsa->sa_mask);
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bsa->sa_flags = 0;
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if ((lsa->sa_flags & LINUX_SA_NOCLDSTOP) != 0)
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bsa->sa_flags |= SA_NOCLDSTOP;
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if ((lsa->sa_flags & LINUX_SA_ONSTACK) != 0)
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bsa->sa_flags |= SA_ONSTACK;
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if ((lsa->sa_flags & LINUX_SA_RESTART) != 0)
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bsa->sa_flags |= SA_RESTART;
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if ((lsa->sa_flags & LINUX_SA_ONESHOT) != 0)
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bsa->sa_flags |= SA_RESETHAND;
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if ((lsa->sa_flags & LINUX_SA_NOMASK) != 0)
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bsa->sa_flags |= SA_NODEFER;
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if ((lsa->sa_flags & LINUX_SA_SIGINFO) != 0)
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bsa->sa_flags |= SA_SIGINFO;
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#ifdef DEBUG_LINUX
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if ((lsa->sa_flags & ~LINUX_SA_ALLBITS) != 0)
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/*XXX*/ printf("linux_to_native_sigaction: extra bits ignored\n");
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if (lsa->sa_restorer != 0)
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/*XXX*/ printf("linux_to_native_sigaction: sa_restorer ignored\n");
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#endif
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}
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void
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native_to_linux_sigaction(bsa, lsa)
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struct sigaction *bsa;
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struct linux_sigaction *lsa;
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{
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/* Clear sa_flags and sa_restorer (if it exists) */
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bzero(lsa, sizeof(struct linux_sigaction));
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/* ...and fill in the mask and flags */
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native_to_linux_sigset(&bsa->sa_mask, &lsa->sa_mask);
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if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
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lsa->sa_flags |= LINUX_SA_NOCLDSTOP;
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if ((bsa->sa_flags & SA_ONSTACK) != 0)
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lsa->sa_flags |= LINUX_SA_ONSTACK;
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if ((bsa->sa_flags & SA_RESTART) != 0)
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lsa->sa_flags |= LINUX_SA_RESTART;
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if ((bsa->sa_flags & SA_NODEFER) != 0)
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lsa->sa_flags |= LINUX_SA_NOMASK;
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if ((bsa->sa_flags & SA_RESETHAND) != 0)
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lsa->sa_flags |= LINUX_SA_ONESHOT;
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if ((bsa->sa_flags & SA_SIGINFO) != 0)
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lsa->sa_flags |= LINUX_SA_SIGINFO;
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lsa->sa_handler = bsa->sa_handler;
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}
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/* ----------------------------------------------------------------------- */
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/*
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* The Linux sigaction() system call. Do the usual conversions,
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* and just call sigaction(). Some flags and values are silently
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* ignored (see above).
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*/
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int
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linux_sys_rt_sigaction(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 linux_sys_rt_sigaction_args /* {
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syscallarg(int) signum;
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syscallarg(const struct linux_sigaction *) nsa;
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syscallarg(struct linux_sigaction *) osa;
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syscallarg(size_t) sigsetsize;
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} */ *uap = v;
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struct linux_sigaction nlsa, olsa;
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struct sigaction nbsa, obsa;
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int error, sig;
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if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
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return (EINVAL);
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if (SCARG(uap, nsa)) {
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error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa));
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if (error)
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return (error);
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linux_to_native_sigaction(&nlsa, &nbsa);
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}
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sig = SCARG(uap, signum);
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if (sig < 0 || sig >= LINUX__NSIG)
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return (EINVAL);
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if (sig > 0 && !linux_to_native_sig[sig]) {
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/* Pretend that we did something useful for unknown signals. */
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obsa.sa_handler = SIG_IGN;
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sigemptyset(&obsa.sa_mask);
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obsa.sa_flags = 0;
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} else {
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error = sigaction1(p, linux_to_native_sig[sig],
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SCARG(uap, nsa) ? &nbsa : NULL, SCARG(uap, osa) ? &obsa : NULL);
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if (error)
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return (error);
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}
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if (SCARG(uap, osa)) {
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native_to_linux_sigaction(&obsa, &olsa);
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error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa));
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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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int
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linux_sigprocmask1(p, how, set, oset)
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struct proc *p;
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int how;
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const linux_old_sigset_t *set;
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linux_old_sigset_t *oset;
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{
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linux_old_sigset_t nlss, olss;
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sigset_t nbss, obss;
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int error;
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switch (how) {
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case LINUX_SIG_BLOCK:
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how = SIG_BLOCK;
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break;
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case LINUX_SIG_UNBLOCK:
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how = SIG_UNBLOCK;
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break;
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case LINUX_SIG_SETMASK:
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how = SIG_SETMASK;
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break;
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default:
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return (EINVAL);
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}
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if (set) {
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error = copyin(set, &nlss, sizeof(nlss));
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if (error)
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return (error);
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linux_old_to_native_sigset(&nlss, &nbss);
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}
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error = sigprocmask1(p, how,
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set ? &nbss : NULL, oset ? &obss : NULL);
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if (error)
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return (error);
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if (oset) {
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native_to_linux_old_sigset(&obss, &olss);
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error = copyout(&olss, oset, sizeof(olss));
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if (error)
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return (error);
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}
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return (error);
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}
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int
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linux_sys_rt_sigprocmask(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 linux_sys_rt_sigprocmask_args /* {
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syscallarg(int) how;
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syscallarg(const linux_sigset_t *) set;
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syscallarg(linux_sigset_t *) oset;
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syscallarg(size_t) sigsetsize;
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} */ *uap = v;
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linux_sigset_t nlss, olss, *oset;
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const linux_sigset_t *set;
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sigset_t nbss, obss;
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int error, how;
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if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
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return (EINVAL);
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switch (SCARG(uap, how)) {
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case LINUX_SIG_BLOCK:
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how = SIG_BLOCK;
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break;
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case LINUX_SIG_UNBLOCK:
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how = SIG_UNBLOCK;
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break;
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case LINUX_SIG_SETMASK:
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how = SIG_SETMASK;
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break;
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default:
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return (EINVAL);
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}
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set = SCARG(uap, set);
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oset = SCARG(uap, oset);
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if (set) {
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error = copyin(set, &nlss, sizeof(nlss));
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if (error)
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return (error);
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linux_to_native_sigset(&nlss, &nbss);
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}
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error = sigprocmask1(p, how,
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set ? &nbss : NULL, oset ? &obss : NULL);
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if (!error && oset) {
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native_to_linux_sigset(&obss, &olss);
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error = copyout(&olss, oset, sizeof(olss));
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}
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return (error);
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}
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int
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linux_sys_rt_sigpending(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 linux_sys_rt_sigpending_args /* {
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syscallarg(linux_sigset_t *) set;
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syscallarg(size_t) sigsetsize;
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} */ *uap = v;
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sigset_t bss;
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linux_sigset_t lss;
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if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
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return (EINVAL);
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sigpending1(p, &bss);
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native_to_linux_sigset(&bss, &lss);
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return copyout(&lss, SCARG(uap, set), sizeof(lss));
|
|
}
|
|
|
|
int
|
|
linux_sys_sigpending(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct linux_sys_sigpending_args /* {
|
|
syscallarg(linux_old_sigset_t *) mask;
|
|
} */ *uap = v;
|
|
sigset_t bss;
|
|
linux_old_sigset_t lss;
|
|
|
|
sigpending1(p, &bss);
|
|
native_to_linux_old_sigset(&bss, &lss);
|
|
return copyout(&lss, SCARG(uap, set), sizeof(lss));
|
|
}
|
|
|
|
int
|
|
linux_sys_sigsuspend(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct linux_sys_sigsuspend_args /* {
|
|
syscallarg(caddr_t) restart;
|
|
syscallarg(int) oldmask;
|
|
syscallarg(int) mask;
|
|
} */ *uap = v;
|
|
linux_old_sigset_t lss;
|
|
sigset_t bss;
|
|
|
|
lss = SCARG(uap, mask);
|
|
linux_old_to_native_sigset(&lss, &bss);
|
|
return (sigsuspend1(p, &bss));
|
|
}
|
|
int
|
|
linux_sys_rt_sigsuspend(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct linux_sys_rt_sigsuspend_args /* {
|
|
syscallarg(linux_sigset_t *) unewset;
|
|
syscallarg(size_t) sigsetsize;
|
|
} */ *uap = v;
|
|
linux_sigset_t lss;
|
|
sigset_t bss;
|
|
int error;
|
|
|
|
if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
|
|
return (EINVAL);
|
|
|
|
error = copyin(SCARG(uap, unewset), &lss, sizeof(linux_sigset_t));
|
|
if (error)
|
|
return (error);
|
|
|
|
linux_to_native_sigset(&lss, &bss);
|
|
|
|
return (sigsuspend1(p, &bss));
|
|
}
|
|
|
|
/*
|
|
* Once more: only a signal conversion is needed.
|
|
* Note: also used as sys_rt_queueinfo. The info field is ignored.
|
|
*/
|
|
int
|
|
linux_sys_rt_queueinfo(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
/* XXX XAX This isn't this really int, int, siginfo_t *, is it? */
|
|
#if 0
|
|
struct linux_sys_rt_queueinfo_args /* {
|
|
syscallarg(int) pid;
|
|
syscallarg(int) signum;
|
|
syscallarg(siginfo_t *) uinfo;
|
|
} */ *uap = v;
|
|
#endif
|
|
|
|
/* XXX To really implement this we need to */
|
|
/* XXX keep a list of queued signals somewhere. */
|
|
return (linux_sys_kill(p, v, retval));
|
|
}
|
|
|
|
int
|
|
linux_sys_kill(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct linux_sys_kill_args /* {
|
|
syscallarg(int) pid;
|
|
syscallarg(int) signum;
|
|
} */ *uap = v;
|
|
struct sys_kill_args ka;
|
|
int sig;
|
|
|
|
SCARG(&ka, pid) = SCARG(uap, pid);
|
|
sig = SCARG(uap, signum);
|
|
if (sig < 0 || sig >= LINUX__NSIG)
|
|
return (EINVAL);
|
|
SCARG(&ka, signum) = linux_to_native_sig[sig];
|
|
return sys_kill(p, &ka, retval);
|
|
}
|
|
|
|
#ifdef LINUX_SS_ONSTACK
|
|
static void linux_to_native_sigaltstack __P((struct sigaltstack *,
|
|
const struct linux_sigaltstack *));
|
|
static void native_to_linux_sigaltstack __P((struct linux_sigaltstack *,
|
|
const struct sigaltstack *));
|
|
|
|
static void
|
|
linux_to_native_sigaltstack(bss, lss)
|
|
struct sigaltstack *bss;
|
|
const struct linux_sigaltstack *lss;
|
|
{
|
|
bss->ss_sp = lss->ss_sp;
|
|
bss->ss_size = lss->ss_size;
|
|
if (lss->ss_flags & LINUX_SS_ONSTACK)
|
|
bss->ss_flags = SS_ONSTACK;
|
|
else if (lss->ss_flags & LINUX_SS_DISABLE)
|
|
bss->ss_flags = SS_DISABLE;
|
|
else
|
|
bss->ss_flags = 0;
|
|
}
|
|
|
|
static void
|
|
native_to_linux_sigaltstack(lss, bss)
|
|
struct linux_sigaltstack *lss;
|
|
const struct sigaltstack *bss;
|
|
{
|
|
lss->ss_sp = bss->ss_sp;
|
|
lss->ss_size = bss->ss_size;
|
|
if (bss->ss_flags & SS_ONSTACK)
|
|
lss->ss_flags = LINUX_SS_ONSTACK;
|
|
else if (bss->ss_flags & SS_DISABLE)
|
|
lss->ss_flags = LINUX_SS_DISABLE;
|
|
else
|
|
lss->ss_flags = 0;
|
|
}
|
|
|
|
int
|
|
linux_sys_sigaltstack(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct linux_sys_sigaltstack_args /* {
|
|
syscallarg(const struct linux_sigaltstack *) ss;
|
|
syscallarg(struct linux_sigaltstack *) oss;
|
|
} */ *uap = v;
|
|
struct linux_sigaltstack ss;
|
|
struct sigaltstack nss, oss;
|
|
int error;
|
|
|
|
if (SCARG(uap, ss) != NULL) {
|
|
if ((error = copyin(SCARG(uap, ss), &ss, sizeof(ss))) != 0)
|
|
return error;
|
|
linux_to_native_sigaltstack(&nss, &ss);
|
|
}
|
|
|
|
error = sigaltstack1(p,
|
|
SCARG(uap, ss) ? &nss : NULL, SCARG(uap, oss) ? &oss : NULL);
|
|
if (error)
|
|
return error;
|
|
|
|
if (SCARG(uap, oss) != NULL) {
|
|
native_to_linux_sigaltstack(&ss, &oss);
|
|
if ((error = copyout(&ss, SCARG(uap, oss), sizeof(ss))) != 0)
|
|
return error;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|