643 lines
15 KiB
C
643 lines
15 KiB
C
/* $NetBSD: svr4_signal.c,v 1.41 2001/02/21 21:39:59 jdolecek Exp $ */
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/*-
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* Copyright (c) 1994, 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 Christos Zoulas and 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/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/wait.h>
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#include <sys/syscallargs.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/svr4/svr4_signal.h>
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#include <compat/svr4/svr4_lwp.h>
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#include <compat/svr4/svr4_ucontext.h>
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#include <compat/svr4/svr4_syscallargs.h>
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#include <compat/svr4/svr4_util.h>
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#include <compat/svr4/svr4_ucontext.h>
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#define svr4_sigmask(n) (1 << (((n) - 1) & 31))
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#define svr4_sigword(n) (((n) - 1) >> 5)
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#define svr4_sigemptyset(s) memset((s), 0, sizeof(*(s)))
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#define svr4_sigismember(s, n) ((s)->bits[svr4_sigword(n)] & svr4_sigmask(n))
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#define svr4_sigaddset(s, n) ((s)->bits[svr4_sigword(n)] |= svr4_sigmask(n))
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static __inline void svr4_sigfillset __P((svr4_sigset_t *));
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void svr4_to_native_sigaction __P((const struct svr4_sigaction *,
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struct sigaction *));
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void native_to_svr4_sigaction __P((const struct sigaction *,
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struct svr4_sigaction *));
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const int native_to_svr4_sig[NSIG] = {
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0,
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SVR4_SIGHUP,
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SVR4_SIGINT,
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SVR4_SIGQUIT,
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SVR4_SIGILL,
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SVR4_SIGTRAP,
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SVR4_SIGABRT,
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SVR4_SIGEMT,
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SVR4_SIGFPE,
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SVR4_SIGKILL,
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SVR4_SIGBUS,
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SVR4_SIGSEGV,
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SVR4_SIGSYS,
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SVR4_SIGPIPE,
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SVR4_SIGALRM,
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SVR4_SIGTERM,
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SVR4_SIGURG,
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SVR4_SIGSTOP,
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SVR4_SIGTSTP,
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SVR4_SIGCONT,
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SVR4_SIGCHLD,
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SVR4_SIGTTIN,
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SVR4_SIGTTOU,
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SVR4_SIGIO,
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SVR4_SIGXCPU,
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SVR4_SIGXFSZ,
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SVR4_SIGVTALRM,
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SVR4_SIGPROF,
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SVR4_SIGWINCH,
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0, /* SIGINFO */
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SVR4_SIGUSR1,
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SVR4_SIGUSR2,
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SVR4_SIGPWR,
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};
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int svr4_to_native_sig[SVR4_NSIG] = {
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0,
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SIGHUP,
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SIGINT,
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SIGQUIT,
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SIGILL,
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SIGTRAP,
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SIGABRT,
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SIGEMT,
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SIGFPE,
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SIGKILL,
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SIGBUS,
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SIGSEGV,
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SIGSYS,
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SIGPIPE,
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SIGALRM,
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SIGTERM,
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SIGUSR1,
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SIGUSR2,
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SIGCHLD,
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SIGPWR,
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SIGWINCH,
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SIGURG,
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SIGIO,
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SIGSTOP,
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SIGTSTP,
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SIGCONT,
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SIGTTIN,
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SIGTTOU,
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SIGVTALRM,
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SIGPROF,
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SIGXCPU,
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SIGXFSZ,
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};
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static __inline void
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svr4_sigfillset(s)
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svr4_sigset_t *s;
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{
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int i;
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svr4_sigemptyset(s);
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for (i = 1; i < SVR4_NSIG; i++)
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if (svr4_to_native_sig[i] != 0)
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svr4_sigaddset(s, i);
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}
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void
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svr4_to_native_sigset(sss, bss)
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const svr4_sigset_t *sss;
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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 < SVR4_NSIG; i++) {
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if (svr4_sigismember(sss, i)) {
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newsig = svr4_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_svr4_sigset(bss, sss)
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const sigset_t *bss;
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svr4_sigset_t *sss;
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{
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int i, newsig;
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svr4_sigemptyset(sss);
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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_svr4_sig[i];
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if (newsig)
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svr4_sigaddset(sss, newsig);
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}
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}
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}
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/*
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* XXX: Only a subset of the flags is currently implemented.
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*/
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void
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svr4_to_native_sigaction(ssa, bsa)
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const struct svr4_sigaction *ssa;
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struct sigaction *bsa;
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{
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bsa->sa_handler = (sig_t) ssa->sa_handler;
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svr4_to_native_sigset(&ssa->sa_mask, &bsa->sa_mask);
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bsa->sa_flags = 0;
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if ((ssa->sa_flags & SVR4_SA_ONSTACK) != 0)
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bsa->sa_flags |= SA_ONSTACK;
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if ((ssa->sa_flags & SVR4_SA_RESETHAND) != 0)
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bsa->sa_flags |= SA_RESETHAND;
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if ((ssa->sa_flags & SVR4_SA_RESTART) != 0)
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bsa->sa_flags |= SA_RESTART;
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if ((ssa->sa_flags & SVR4_SA_SIGINFO) != 0)
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DPRINTF(("svr4_to_native_sigaction: SA_SIGINFO ignored\n"));
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if ((ssa->sa_flags & SVR4_SA_NODEFER) != 0)
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bsa->sa_flags |= SA_NODEFER;
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if ((ssa->sa_flags & SVR4_SA_NOCLDWAIT) != 0)
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bsa->sa_flags |= SA_NOCLDWAIT;
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if ((ssa->sa_flags & SVR4_SA_NOCLDSTOP) != 0)
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bsa->sa_flags |= SA_NOCLDSTOP;
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if ((ssa->sa_flags & ~SVR4_SA_ALLBITS) != 0)
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DPRINTF(("svr4_to_native_sigaction: extra bits %x ignored\n",
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ssa->sa_flags & ~SVR4_SA_ALLBITS));
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}
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void
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native_to_svr4_sigaction(bsa, ssa)
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const struct sigaction *bsa;
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struct svr4_sigaction *ssa;
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{
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ssa->sa_handler = (svr4_sig_t) bsa->sa_handler;
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native_to_svr4_sigset(&bsa->sa_mask, &ssa->sa_mask);
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ssa->sa_flags = 0;
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if ((bsa->sa_flags & SA_ONSTACK) != 0)
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ssa->sa_flags |= SVR4_SA_ONSTACK;
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if ((bsa->sa_flags & SA_RESETHAND) != 0)
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ssa->sa_flags |= SVR4_SA_RESETHAND;
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if ((bsa->sa_flags & SA_RESTART) != 0)
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ssa->sa_flags |= SVR4_SA_RESTART;
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if ((bsa->sa_flags & SA_NODEFER) != 0)
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ssa->sa_flags |= SVR4_SA_NODEFER;
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if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
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ssa->sa_flags |= SVR4_SA_NOCLDSTOP;
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}
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void
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svr4_to_native_sigaltstack(sss, bss)
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const struct svr4_sigaltstack *sss;
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struct sigaltstack *bss;
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{
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bss->ss_sp = sss->ss_sp;
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bss->ss_size = sss->ss_size;
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bss->ss_flags = 0;
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if ((sss->ss_flags & SVR4_SS_DISABLE) != 0)
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bss->ss_flags |= SS_DISABLE;
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if ((sss->ss_flags & SVR4_SS_ONSTACK) != 0)
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bss->ss_flags |= SS_ONSTACK;
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if ((sss->ss_flags & ~SVR4_SS_ALLBITS) != 0)
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/*XXX*/ printf("svr4_to_native_sigaltstack: extra bits %x ignored\n",
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sss->ss_flags & ~SVR4_SS_ALLBITS);
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}
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void
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native_to_svr4_sigaltstack(bss, sss)
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const struct sigaltstack *bss;
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struct svr4_sigaltstack *sss;
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{
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sss->ss_sp = bss->ss_sp;
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sss->ss_size = bss->ss_size;
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sss->ss_flags = 0;
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if ((bss->ss_flags & SS_DISABLE) != 0)
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sss->ss_flags |= SVR4_SS_DISABLE;
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if ((bss->ss_flags & SS_ONSTACK) != 0)
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sss->ss_flags |= SVR4_SS_ONSTACK;
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}
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int
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svr4_sys_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 svr4_sys_sigaction_args /* {
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syscallarg(int) signum;
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syscallarg(const struct svr4_sigaction *) nsa;
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syscallarg(struct svr4_sigaction *) osa;
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} */ *uap = v;
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struct svr4_sigaction nssa, ossa;
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struct sigaction nbsa, obsa;
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int error;
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if (SCARG(uap, nsa)) {
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error = copyin(SCARG(uap, nsa), &nssa, sizeof(nssa));
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if (error)
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return (error);
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svr4_to_native_sigaction(&nssa, &nbsa);
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}
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error = sigaction1(p, svr4_to_native_sig[SCARG(uap, signum)],
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SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0);
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if (error)
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return (error);
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if (SCARG(uap, osa)) {
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native_to_svr4_sigaction(&obsa, &ossa);
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error = copyout(&ossa, SCARG(uap, osa), sizeof(ossa));
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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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svr4_sys_sigaltstack(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 svr4_sys_sigaltstack_args /* {
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syscallarg(const struct svr4_sigaltstack *) nss;
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syscallarg(struct svr4_sigaltstack *) oss;
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} */ *uap = v;
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struct svr4_sigaltstack nsss, osss;
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struct sigaltstack nbss, obss;
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int error;
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if (SCARG(uap, nss)) {
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error = copyin(SCARG(uap, nss), &nsss, sizeof(nsss));
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if (error)
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return (error);
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svr4_to_native_sigaltstack(&nsss, &nbss);
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}
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error = sigaltstack1(p,
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SCARG(uap, nss) ? &nbss : 0, SCARG(uap, oss) ? &obss : 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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native_to_svr4_sigaltstack(&obss, &osss);
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error = copyout(&osss, SCARG(uap, oss), sizeof(osss));
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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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* Stolen from the ibcs2 one
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*/
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int
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svr4_sys_signal(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 svr4_sys_signal_args /* {
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syscallarg(int) signum;
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syscallarg(svr4_sig_t) handler;
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} */ *uap = v;
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int signum = svr4_to_native_sig[SVR4_SIGNO(SCARG(uap, signum))];
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struct sigaction nbsa, obsa;
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sigset_t ss;
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int error;
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if (signum <= 0 || signum >= SVR4_NSIG)
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return (EINVAL);
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switch (SVR4_SIGCALL(SCARG(uap, signum))) {
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case SVR4_SIGDEFER_MASK:
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if (SCARG(uap, handler) == SVR4_SIG_HOLD)
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goto sighold;
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/* FALLTHROUGH */
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case SVR4_SIGNAL_MASK:
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nbsa.sa_handler = (sig_t)SCARG(uap, handler);
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sigemptyset(&nbsa.sa_mask);
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nbsa.sa_flags = 0;
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error = sigaction1(p, signum, &nbsa, &obsa);
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if (error)
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return (error);
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*retval = (u_int)(u_long)obsa.sa_handler;
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return (0);
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case SVR4_SIGHOLD_MASK:
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sighold:
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sigemptyset(&ss);
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sigaddset(&ss, signum);
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return (sigprocmask1(p, SIG_BLOCK, &ss, 0));
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case SVR4_SIGRELSE_MASK:
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sigemptyset(&ss);
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sigaddset(&ss, signum);
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return (sigprocmask1(p, SIG_UNBLOCK, &ss, 0));
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case SVR4_SIGIGNORE_MASK:
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nbsa.sa_handler = SIG_IGN;
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sigemptyset(&nbsa.sa_mask);
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nbsa.sa_flags = 0;
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return (sigaction1(p, signum, &nbsa, 0));
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case SVR4_SIGPAUSE_MASK:
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ss = p->p_sigctx.ps_sigmask;
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sigdelset(&ss, signum);
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return (sigsuspend1(p, &ss));
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default:
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return (ENOSYS);
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}
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}
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int
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svr4_sys_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 svr4_sys_sigprocmask_args /* {
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syscallarg(int) how;
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syscallarg(const svr4_sigset_t *) set;
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syscallarg(svr4_sigset_t *) oset;
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} */ *uap = v;
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svr4_sigset_t nsss, osss;
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sigset_t nbss, obss;
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int how;
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int error;
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/*
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* Initialize how to 0 to avoid a compiler warning. Note that
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* this is safe because of the check in the default: case.
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*/
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how = 0;
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switch (SCARG(uap, how)) {
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case SVR4_SIG_BLOCK:
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how = SIG_BLOCK;
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break;
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case SVR4_SIG_UNBLOCK:
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how = SIG_UNBLOCK;
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break;
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case SVR4_SIG_SETMASK:
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how = SIG_SETMASK;
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break;
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default:
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if (SCARG(uap, set))
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return EINVAL;
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break;
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}
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if (SCARG(uap, set)) {
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error = copyin(SCARG(uap, set), &nsss, sizeof(nsss));
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if (error)
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return error;
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svr4_to_native_sigset(&nsss, &nbss);
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}
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error = sigprocmask1(p, how,
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SCARG(uap, set) ? &nbss : NULL, SCARG(uap, oset) ? &obss : NULL);
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if (error)
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return error;
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if (SCARG(uap, oset)) {
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native_to_svr4_sigset(&obss, &osss);
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error = copyout(&osss, SCARG(uap, oset), sizeof(osss));
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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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svr4_sys_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 svr4_sys_sigpending_args /* {
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syscallarg(int) what;
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syscallarg(svr4_sigset_t *) set;
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} */ *uap = v;
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sigset_t bss;
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svr4_sigset_t sss;
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switch (SCARG(uap, what)) {
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case 1: /* sigpending */
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sigpending1(p, &bss);
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native_to_svr4_sigset(&bss, &sss);
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break;
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|
|
|
case 2: /* sigfillset */
|
|
svr4_sigfillset(&sss);
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
return (copyout(&sss, SCARG(uap, set), sizeof(sss)));
|
|
}
|
|
|
|
int
|
|
svr4_sys_sigsuspend(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct svr4_sys_sigsuspend_args /* {
|
|
syscallarg(const svr4_sigset_t *) set;
|
|
} */ *uap = v;
|
|
svr4_sigset_t sss;
|
|
sigset_t bss;
|
|
int error;
|
|
|
|
if (SCARG(uap, set)) {
|
|
error = copyin(SCARG(uap, set), &sss, sizeof(sss));
|
|
if (error)
|
|
return (error);
|
|
svr4_to_native_sigset(&sss, &bss);
|
|
}
|
|
|
|
return (sigsuspend1(p, SCARG(uap, set) ? &bss : 0));
|
|
}
|
|
|
|
int
|
|
svr4_sys_pause(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
|
|
return (sigsuspend1(p, 0));
|
|
}
|
|
|
|
int
|
|
svr4_sys_kill(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct svr4_sys_kill_args /* {
|
|
syscallarg(int) pid;
|
|
syscallarg(int) signum;
|
|
} */ *uap = v;
|
|
struct sys_kill_args ka;
|
|
|
|
SCARG(&ka, pid) = SCARG(uap, pid);
|
|
SCARG(&ka, signum) = svr4_to_native_sig[SCARG(uap, signum)];
|
|
return sys_kill(p, &ka, retval);
|
|
}
|
|
|
|
void
|
|
svr4_getcontext(p, uc, mask)
|
|
struct proc *p;
|
|
struct svr4_ucontext *uc;
|
|
sigset_t *mask;
|
|
{
|
|
void *sp;
|
|
struct svr4_sigaltstack *ss = &uc->uc_stack;
|
|
|
|
memset(uc, 0, sizeof(*uc));
|
|
|
|
/* get machine context */
|
|
sp = svr4_getmcontext(p, &uc->uc_mcontext, &uc->uc_flags);
|
|
|
|
/* get link */
|
|
uc->uc_link = p->p_ctxlink;
|
|
|
|
/* get stack state. XXX: solaris appears to do this */
|
|
#if 0
|
|
svr4_to_native_sigaltstack(&uc->uc_stack, &p->p_sigacts->ps_sigstk);
|
|
#else
|
|
ss->ss_sp = (void *)(((u_long) sp) & ~(16384 - 1));
|
|
ss->ss_size = 16384;
|
|
ss->ss_flags = 0;
|
|
#endif
|
|
/* get signal mask */
|
|
native_to_svr4_sigset(mask, &uc->uc_sigmask);
|
|
|
|
uc->uc_flags |= SVR4_UC_STACK|SVR4_UC_SIGMASK;
|
|
}
|
|
|
|
|
|
int
|
|
svr4_setcontext(p, uc)
|
|
struct proc *p;
|
|
struct svr4_ucontext *uc;
|
|
{
|
|
int error;
|
|
|
|
/* set machine context */
|
|
if ((error = svr4_setmcontext(p, &uc->uc_mcontext, uc->uc_flags)) != 0)
|
|
return error;
|
|
|
|
/* set link */
|
|
p->p_ctxlink = uc->uc_link;
|
|
|
|
/* set signal stack */
|
|
if (uc->uc_flags & SVR4_UC_STACK) {
|
|
svr4_to_native_sigaltstack(&uc->uc_stack,
|
|
&p->p_sigctx.ps_sigstk);
|
|
}
|
|
|
|
/* set signal mask */
|
|
if (uc->uc_flags & SVR4_UC_SIGMASK) {
|
|
sigset_t mask;
|
|
|
|
svr4_to_native_sigset(&uc->uc_sigmask, &mask);
|
|
(void)sigprocmask1(p, SIG_SETMASK, &mask, 0);
|
|
}
|
|
|
|
return EJUSTRETURN;
|
|
}
|
|
|
|
int
|
|
svr4_sys_context(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct svr4_sys_context_args /* {
|
|
syscallarg(int) func;
|
|
syscallarg(struct svr4_ucontext *) uc;
|
|
} */ *uap = v;
|
|
struct svr4_ucontext uc;
|
|
int error;
|
|
*retval = 0;
|
|
|
|
switch (SCARG(uap, func)) {
|
|
case SVR4_GETCONTEXT:
|
|
DPRINTF(("getcontext(%p)\n", SCARG(uap, uc)));
|
|
svr4_getcontext(p, &uc, &p->p_sigctx.ps_sigmask);
|
|
return copyout(&uc, SCARG(uap, uc), sizeof(uc));
|
|
|
|
case SVR4_SETCONTEXT:
|
|
DPRINTF(("setcontext(%p)\n", SCARG(uap, uc)));
|
|
if (SCARG(uap, uc) == NULL)
|
|
exit1(p, W_EXITCODE(0, 0));
|
|
else if ((error = copyin(SCARG(uap, uc), &uc, sizeof(uc))) != 0)
|
|
return error;
|
|
else
|
|
return svr4_setcontext(p, &uc);
|
|
|
|
default:
|
|
DPRINTF(("context(%d, %p)\n", SCARG(uap, func),
|
|
SCARG(uap, uc)));
|
|
return ENOSYS;
|
|
}
|
|
return 0;
|
|
}
|