4093529dee
a follow on commit to kern_sig.c - signotify() now operates on a thread since unmasked pending signals are stored in the thread. - PS_NEEDSIGCHK moves to TDF_NEEDSIGCHK.
513 lines
12 KiB
C
513 lines
12 KiB
C
/*
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* Copyright (c) 1995 Scott Bartram
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* Copyright (c) 1995 Steven Wallace
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* All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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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/lock.h>
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#include <sys/mutex.h>
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#include <sys/signalvar.h>
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#include <sys/sysproto.h>
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#include <i386/ibcs2/ibcs2_types.h>
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#include <i386/ibcs2/ibcs2_signal.h>
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#include <i386/ibcs2/ibcs2_proto.h>
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#include <i386/ibcs2/ibcs2_xenix.h>
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#include <i386/ibcs2/ibcs2_util.h>
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#define sigemptyset(s) SIGEMPTYSET(*(s))
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#define sigismember(s, n) SIGISMEMBER(*(s), n)
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#define sigaddset(s, n) SIGADDSET(*(s), n)
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#define ibcs2_sigmask(n) (1 << ((n) - 1))
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#define ibcs2_sigemptyset(s) bzero((s), sizeof(*(s)))
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#define ibcs2_sigismember(s, n) (*(s) & ibcs2_sigmask(n))
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#define ibcs2_sigaddset(s, n) (*(s) |= ibcs2_sigmask(n))
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static void ibcs2_to_bsd_sigset(const ibcs2_sigset_t *, sigset_t *);
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static void bsd_to_ibcs2_sigset(const sigset_t *, ibcs2_sigset_t *);
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static void ibcs2_to_bsd_sigaction(struct ibcs2_sigaction *,
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struct sigaction *);
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static void bsd_to_ibcs2_sigaction(struct sigaction *,
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struct ibcs2_sigaction *);
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int bsd_to_ibcs2_sig[IBCS2_SIGTBLSZ] = {
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IBCS2_SIGHUP, /* 1 */
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IBCS2_SIGINT, /* 2 */
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IBCS2_SIGQUIT, /* 3 */
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IBCS2_SIGILL, /* 4 */
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IBCS2_SIGTRAP, /* 5 */
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IBCS2_SIGABRT, /* 6 */
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IBCS2_SIGEMT, /* 7 */
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IBCS2_SIGFPE, /* 8 */
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IBCS2_SIGKILL, /* 9 */
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IBCS2_SIGBUS, /* 10 */
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IBCS2_SIGSEGV, /* 11 */
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IBCS2_SIGSYS, /* 12 */
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IBCS2_SIGPIPE, /* 13 */
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IBCS2_SIGALRM, /* 14 */
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IBCS2_SIGTERM, /* 15 */
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0, /* 16 - SIGURG */
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IBCS2_SIGSTOP, /* 17 */
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IBCS2_SIGTSTP, /* 18 */
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IBCS2_SIGCONT, /* 19 */
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IBCS2_SIGCLD, /* 20 */
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IBCS2_SIGTTIN, /* 21 */
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IBCS2_SIGTTOU, /* 22 */
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IBCS2_SIGPOLL, /* 23 */
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0, /* 24 - SIGXCPU */
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0, /* 25 - SIGXFSZ */
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IBCS2_SIGVTALRM, /* 26 */
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IBCS2_SIGPROF, /* 27 */
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IBCS2_SIGWINCH, /* 28 */
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0, /* 29 */
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IBCS2_SIGUSR1, /* 30 */
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IBCS2_SIGUSR2, /* 31 */
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0 /* 32 */
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};
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static int ibcs2_to_bsd_sig[IBCS2_SIGTBLSZ] = {
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SIGHUP, /* 1 */
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SIGINT, /* 2 */
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SIGQUIT, /* 3 */
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SIGILL, /* 4 */
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SIGTRAP, /* 5 */
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SIGABRT, /* 6 */
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SIGEMT, /* 7 */
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SIGFPE, /* 8 */
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SIGKILL, /* 9 */
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SIGBUS, /* 10 */
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SIGSEGV, /* 11 */
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SIGSYS, /* 12 */
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SIGPIPE, /* 13 */
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SIGALRM, /* 14 */
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SIGTERM, /* 15 */
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SIGUSR1, /* 16 */
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SIGUSR2, /* 17 */
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SIGCHLD, /* 18 */
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0, /* 19 - SIGPWR */
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SIGWINCH, /* 20 */
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0, /* 21 */
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SIGIO, /* 22 */
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SIGSTOP, /* 23 */
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SIGTSTP, /* 24 */
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SIGCONT, /* 25 */
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SIGTTIN, /* 26 */
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SIGTTOU, /* 27 */
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SIGVTALRM, /* 28 */
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SIGPROF, /* 29 */
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0, /* 30 */
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0, /* 31 */
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0 /* 32 */
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};
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void
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ibcs2_to_bsd_sigset(iss, bss)
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const ibcs2_sigset_t *iss;
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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 <= IBCS2_SIGTBLSZ; i++) {
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if (ibcs2_sigismember(iss, i)) {
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newsig = ibcs2_to_bsd_sig[_SIG_IDX(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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static void
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bsd_to_ibcs2_sigset(bss, iss)
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const sigset_t *bss;
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ibcs2_sigset_t *iss;
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{
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int i, newsig;
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ibcs2_sigemptyset(iss);
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for (i = 1; i <= IBCS2_SIGTBLSZ; i++) {
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if (sigismember(bss, i)) {
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newsig = bsd_to_ibcs2_sig[_SIG_IDX(i)];
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if (newsig)
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ibcs2_sigaddset(iss, newsig);
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}
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}
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}
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static void
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ibcs2_to_bsd_sigaction(isa, bsa)
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struct ibcs2_sigaction *isa;
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struct sigaction *bsa;
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{
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bsa->sa_handler = isa->isa_handler;
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ibcs2_to_bsd_sigset(&isa->isa_mask, &bsa->sa_mask);
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bsa->sa_flags = 0; /* ??? SA_NODEFER */
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if ((isa->isa_flags & IBCS2_SA_NOCLDSTOP) != 0)
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bsa->sa_flags |= SA_NOCLDSTOP;
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}
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static void
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bsd_to_ibcs2_sigaction(bsa, isa)
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struct sigaction *bsa;
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struct ibcs2_sigaction *isa;
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{
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isa->isa_handler = bsa->sa_handler;
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bsd_to_ibcs2_sigset(&bsa->sa_mask, &isa->isa_mask);
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isa->isa_flags = 0;
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if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
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isa->isa_flags |= IBCS2_SA_NOCLDSTOP;
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}
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int
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ibcs2_sigaction(td, uap)
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register struct thread *td;
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struct ibcs2_sigaction_args *uap;
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{
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struct ibcs2_sigaction *nisa, *oisa, tmpisa;
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struct sigaction *nbsa, *obsa, tmpbsa;
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struct sigaction_args sa;
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caddr_t sg;
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int error;
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sg = stackgap_init();
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nisa = uap->act;
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oisa = uap->oact;
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if (oisa != NULL)
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obsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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else
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obsa = NULL;
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if (nisa != NULL) {
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nbsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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if ((error = copyin(nisa, &tmpisa, sizeof(tmpisa))) != 0)
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return error;
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ibcs2_to_bsd_sigaction(&tmpisa, &tmpbsa);
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if ((error = copyout(&tmpbsa, nbsa, sizeof(tmpbsa))) != 0)
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return error;
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} else
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nbsa = NULL;
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sa.sig = ibcs2_to_bsd_sig[_SIG_IDX(uap->sig)];
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sa.act = nbsa;
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sa.oact = obsa;
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if ((error = sigaction(td, &sa)) != 0)
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return error;
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if (oisa != NULL) {
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if ((error = copyin(obsa, &tmpbsa, sizeof(tmpbsa))) != 0)
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return error;
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bsd_to_ibcs2_sigaction(&tmpbsa, &tmpisa);
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if ((error = copyout(&tmpisa, oisa, sizeof(tmpisa))) != 0)
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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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ibcs2_sigsys(td, uap)
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register struct thread *td;
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struct ibcs2_sigsys_args *uap;
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{
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struct proc *p = td->td_proc;
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struct sigaction sa;
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int signum = ibcs2_to_bsd_sig[_SIG_IDX(IBCS2_SIGNO(uap->sig))];
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int error;
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caddr_t sg = stackgap_init();
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if (signum <= 0 || signum >= IBCS2_NSIG) {
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if (IBCS2_SIGCALL(uap->sig) == IBCS2_SIGNAL_MASK ||
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IBCS2_SIGCALL(uap->sig) == IBCS2_SIGSET_MASK)
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td->td_retval[0] = (int)IBCS2_SIG_ERR;
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return EINVAL;
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}
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switch (IBCS2_SIGCALL(uap->sig)) {
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case IBCS2_SIGSET_MASK:
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/*
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* Check for SIG_HOLD action.
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* Otherwise, perform signal() except with different sa_flags.
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*/
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if (uap->fp != IBCS2_SIG_HOLD) {
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/* add sig to mask before exececuting signal handler */
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sa.sa_flags = 0;
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goto ibcs2_sigset;
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}
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/* else FALLTHROUGH to sighold */
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case IBCS2_SIGHOLD_MASK:
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{
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sigset_t mask;
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struct sigprocmask_args sa;
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SIGEMPTYSET(mask);
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SIGADDSET(mask, signum);
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sa.how = SIG_BLOCK;
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sa.set = &mask;
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sa.oset = NULL;
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return sigprocmask(td, &sa);
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}
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case IBCS2_SIGNAL_MASK:
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{
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struct sigaction_args sa_args;
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struct sigaction *nbsa, *obsa;
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/* do not automatically block signal */
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sa.sa_flags = SA_NODEFER;
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#ifdef SA_RESETHAND
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if((signum != IBCS2_SIGILL) &&
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(signum != IBCS2_SIGTRAP) &&
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(signum != IBCS2_SIGPWR))
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/* set to SIG_DFL before executing handler */
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sa.sa_flags |= SA_RESETHAND;
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#endif
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ibcs2_sigset:
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nbsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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obsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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sa_args.sig = signum;
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sa_args.act = nbsa;
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sa_args.oact = obsa;
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sa.sa_handler = uap->fp;
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sigemptyset(&sa.sa_mask);
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#if 0
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if (signum != SIGALRM)
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sa.sa_flags |= SA_RESTART;
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#endif
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td->td_retval[0] = (int)IBCS2_SIG_ERR; /* init error return */
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/* perform native sigaction() */
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if ((error = copyout(&sa, nbsa, sizeof(sa))) != 0)
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return error;
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if ((error = sigaction(td, &sa_args)) != 0) {
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DPRINTF(("signal: sigaction failed: %d\n",
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error));
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return error;
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}
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if ((error = copyin(obsa, &sa, sizeof(sa))) != 0)
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return error;
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td->td_retval[0] = (int)sa.sa_handler;
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/* special sigset() check */
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if(IBCS2_SIGCALL(uap->sig) == IBCS2_SIGSET_MASK) {
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PROC_LOCK(p);
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/* check to make sure signal is not blocked */
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if(sigismember(&td->td_sigmask, signum)) {
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/* return SIG_HOLD and unblock signal*/
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td->td_retval[0] = (int)IBCS2_SIG_HOLD;
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SIGDELSET(td->td_sigmask, signum);
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signotify(td);
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}
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PROC_UNLOCK(p);
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}
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return 0;
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}
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case IBCS2_SIGRELSE_MASK:
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{
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sigset_t mask;
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struct sigprocmask_args sa;
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SIGEMPTYSET(mask);
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SIGADDSET(mask, signum);
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sa.how = SIG_UNBLOCK;
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sa.set = &mask;
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sa.oset = NULL;
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return sigprocmask(td, &sa);
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}
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case IBCS2_SIGIGNORE_MASK:
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{
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struct sigaction_args sa_args;
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struct sigaction *bsa;
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bsa = stackgap_alloc(&sg, sizeof(struct sigaction));
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sa_args.sig = signum;
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sa_args.act = bsa;
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sa_args.oact = NULL;
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sa.sa_handler = SIG_IGN;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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if ((error = copyout(&sa, bsa, sizeof(sa))) != 0)
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return error;
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if ((error = sigaction(td, &sa_args)) != 0) {
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DPRINTF(("sigignore: sigaction failed\n"));
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return error;
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}
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return 0;
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}
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case IBCS2_SIGPAUSE_MASK:
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{
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sigset_t mask;
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struct sigsuspend_args sa;
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PROC_LOCK(p);
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mask = td->td_sigmask;
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PROC_UNLOCK(p);
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SIGDELSET(mask, signum);
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sa.sigmask = &mask;
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return sigsuspend(td, &sa);
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}
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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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ibcs2_sigprocmask(td, uap)
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register struct thread *td;
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struct ibcs2_sigprocmask_args *uap;
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{
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struct proc *p = td->td_proc;
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ibcs2_sigset_t iss;
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sigset_t bss;
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int error = 0;
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if (uap->oset != NULL) {
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/* Fix the return value first if needed */
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PROC_LOCK(p);
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bsd_to_ibcs2_sigset(&td->td_sigmask, &iss);
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PROC_UNLOCK(p);
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if ((error = copyout(&iss, uap->oset, sizeof(iss))) != 0)
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return error;
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}
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if (uap->set == NULL)
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/* Just examine */
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return 0;
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if ((error = copyin(uap->set, &iss, sizeof(iss))) != 0)
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return error;
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ibcs2_to_bsd_sigset(&iss, &bss);
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PROC_LOCK(p);
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switch (uap->how) {
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case IBCS2_SIG_BLOCK:
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SIGSETOR(td->td_sigmask, bss);
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SIG_CANTMASK(td->td_sigmask);
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break;
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case IBCS2_SIG_UNBLOCK:
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SIGSETNAND(td->td_sigmask, bss);
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signotify(td);
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break;
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case IBCS2_SIG_SETMASK:
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td->td_sigmask = bss;
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SIG_CANTMASK(td->td_sigmask);
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signotify(td);
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break;
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default:
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error = EINVAL;
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break;
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}
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PROC_UNLOCK(p);
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return error;
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}
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int
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ibcs2_sigpending(td, uap)
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register struct thread *td;
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struct ibcs2_sigpending_args *uap;
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{
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struct proc *p = td->td_proc;
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sigset_t bss;
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ibcs2_sigset_t iss;
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PROC_LOCK(p);
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bss = td->td_siglist;
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SIGSETOR(bss, p->p_siglist);
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SIGSETAND(bss, td->td_sigmask);
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PROC_UNLOCK(p);
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bsd_to_ibcs2_sigset(&bss, &iss);
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return copyout(&iss, uap->mask, sizeof(iss));
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}
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int
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ibcs2_sigsuspend(td, uap)
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register struct thread *td;
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struct ibcs2_sigsuspend_args *uap;
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{
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ibcs2_sigset_t sss;
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sigset_t bss;
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struct sigsuspend_args sa;
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int error;
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if ((error = copyin(uap->mask, &sss, sizeof(sss))) != 0)
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return error;
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ibcs2_to_bsd_sigset(&sss, &bss);
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sa.sigmask = &bss;
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return sigsuspend(td, &sa);
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}
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int
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ibcs2_pause(td, uap)
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register struct thread *td;
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struct ibcs2_pause_args *uap;
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{
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struct proc *p = td->td_proc;
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sigset_t mask;
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struct sigsuspend_args sa;
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PROC_LOCK(p);
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mask = td->td_sigmask;
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PROC_UNLOCK(p);
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sa.sigmask = &mask;
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return sigsuspend(td, &sa);
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}
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int
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ibcs2_kill(td, uap)
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register struct thread *td;
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struct ibcs2_kill_args *uap;
|
|
{
|
|
struct kill_args ka;
|
|
|
|
ka.pid = uap->pid;
|
|
ka.signum = ibcs2_to_bsd_sig[_SIG_IDX(uap->signo)];
|
|
return kill(td, &ka);
|
|
}
|