440 lines
10 KiB
C
440 lines
10 KiB
C
/*-
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* Copyright (c) 1994-1995 Søren Schmidt
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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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* in this position and unchanged.
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/proc.h>
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#include <sys/signalvar.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysproto.h>
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#include "opt_compat.h"
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#ifdef COMPAT_LINUX32
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#include <machine/../linux32/linux.h>
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#include <machine/../linux32/linux32_proto.h>
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#else
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#include <machine/../linux/linux.h>
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#include <machine/../linux/linux_proto.h>
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#endif
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#include <compat/linux/linux_signal.h>
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#include <compat/linux/linux_util.h>
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void
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linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
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{
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int b, l;
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SIGEMPTYSET(*bss);
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bss->__bits[0] = lss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
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bss->__bits[1] = lss->__bits[1];
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for (l = 1; l <= LINUX_SIGTBLSZ; l++) {
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if (LINUX_SIGISMEMBER(*lss, l)) {
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#ifdef __alpha__
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b = _SIG_IDX(l);
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#else
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b = linux_to_bsd_signal[_SIG_IDX(l)];
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#endif
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if (b)
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SIGADDSET(*bss, b);
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}
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}
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}
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void
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bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
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{
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int b, l;
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LINUX_SIGEMPTYSET(*lss);
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lss->__bits[0] = bss->__bits[0] & ~((1U << LINUX_SIGTBLSZ) - 1);
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lss->__bits[1] = bss->__bits[1];
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for (b = 1; b <= LINUX_SIGTBLSZ; b++) {
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if (SIGISMEMBER(*bss, b)) {
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#if __alpha__
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l = _SIG_IDX(b);
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#else
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l = bsd_to_linux_signal[_SIG_IDX(b)];
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#endif
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if (l)
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LINUX_SIGADDSET(*lss, l);
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}
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}
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}
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static void
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linux_to_bsd_sigaction(l_sigaction_t *lsa, struct sigaction *bsa)
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{
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linux_to_bsd_sigset(&lsa->lsa_mask, &bsa->sa_mask);
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bsa->sa_handler = PTRIN(lsa->lsa_handler);
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bsa->sa_flags = 0;
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if (lsa->lsa_flags & LINUX_SA_NOCLDSTOP)
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bsa->sa_flags |= SA_NOCLDSTOP;
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if (lsa->lsa_flags & LINUX_SA_NOCLDWAIT)
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bsa->sa_flags |= SA_NOCLDWAIT;
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if (lsa->lsa_flags & LINUX_SA_SIGINFO)
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bsa->sa_flags |= SA_SIGINFO;
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if (lsa->lsa_flags & LINUX_SA_ONSTACK)
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bsa->sa_flags |= SA_ONSTACK;
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if (lsa->lsa_flags & LINUX_SA_RESTART)
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bsa->sa_flags |= SA_RESTART;
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if (lsa->lsa_flags & LINUX_SA_ONESHOT)
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bsa->sa_flags |= SA_RESETHAND;
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if (lsa->lsa_flags & LINUX_SA_NOMASK)
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bsa->sa_flags |= SA_NODEFER;
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}
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static void
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bsd_to_linux_sigaction(struct sigaction *bsa, l_sigaction_t *lsa)
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{
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bsd_to_linux_sigset(&bsa->sa_mask, &lsa->lsa_mask);
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#ifdef COMPAT_LINUX32
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lsa->lsa_handler = (uintptr_t)bsa->sa_handler;
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#else
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lsa->lsa_handler = bsa->sa_handler;
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#endif
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lsa->lsa_restorer = 0; /* unsupported */
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lsa->lsa_flags = 0;
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if (bsa->sa_flags & SA_NOCLDSTOP)
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lsa->lsa_flags |= LINUX_SA_NOCLDSTOP;
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if (bsa->sa_flags & SA_NOCLDWAIT)
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lsa->lsa_flags |= LINUX_SA_NOCLDWAIT;
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if (bsa->sa_flags & SA_SIGINFO)
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lsa->lsa_flags |= LINUX_SA_SIGINFO;
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if (bsa->sa_flags & SA_ONSTACK)
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lsa->lsa_flags |= LINUX_SA_ONSTACK;
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if (bsa->sa_flags & SA_RESTART)
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lsa->lsa_flags |= LINUX_SA_RESTART;
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if (bsa->sa_flags & SA_RESETHAND)
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lsa->lsa_flags |= LINUX_SA_ONESHOT;
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if (bsa->sa_flags & SA_NODEFER)
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lsa->lsa_flags |= LINUX_SA_NOMASK;
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}
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int
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linux_do_sigaction(struct thread *td, int linux_sig, l_sigaction_t *linux_nsa,
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l_sigaction_t *linux_osa)
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{
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struct sigaction act, oact, *nsa, *osa;
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int error, sig;
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if (linux_sig <= 0 || linux_sig > LINUX_NSIG)
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return (EINVAL);
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osa = (linux_osa != NULL) ? &oact : NULL;
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if (linux_nsa != NULL) {
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nsa = &act;
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linux_to_bsd_sigaction(linux_nsa, nsa);
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} else
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nsa = NULL;
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#ifndef __alpha__
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if (linux_sig <= LINUX_SIGTBLSZ)
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sig = linux_to_bsd_signal[_SIG_IDX(linux_sig)];
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else
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#endif
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sig = linux_sig;
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error = kern_sigaction(td, sig, nsa, osa, 0);
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if (error)
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return (error);
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if (linux_osa != NULL)
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bsd_to_linux_sigaction(osa, linux_osa);
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return (0);
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}
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#ifndef __alpha__
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int
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linux_signal(struct thread *td, struct linux_signal_args *args)
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{
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l_sigaction_t nsa, osa;
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int error;
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#ifdef DEBUG
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if (ldebug(signal))
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printf(ARGS(signal, "%d, %p"),
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args->sig, (void *)(uintptr_t)args->handler);
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#endif
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nsa.lsa_handler = args->handler;
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nsa.lsa_flags = LINUX_SA_ONESHOT | LINUX_SA_NOMASK;
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LINUX_SIGEMPTYSET(nsa.lsa_mask);
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error = linux_do_sigaction(td, args->sig, &nsa, &osa);
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td->td_retval[0] = (int)(intptr_t)osa.lsa_handler;
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return (error);
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}
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#endif /*!__alpha__*/
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int
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linux_rt_sigaction(struct thread *td, struct linux_rt_sigaction_args *args)
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{
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l_sigaction_t nsa, osa;
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int error;
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#ifdef DEBUG
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if (ldebug(rt_sigaction))
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printf(ARGS(rt_sigaction, "%ld, %p, %p, %ld"),
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(long)args->sig, (void *)args->act,
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(void *)args->oact, (long)args->sigsetsize);
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#endif
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if (args->sigsetsize != sizeof(l_sigset_t))
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return (EINVAL);
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if (args->act != NULL) {
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error = copyin(args->act, &nsa, sizeof(l_sigaction_t));
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if (error)
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return (error);
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}
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error = linux_do_sigaction(td, args->sig,
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args->act ? &nsa : NULL,
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args->oact ? &osa : NULL);
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if (args->oact != NULL && !error) {
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error = copyout(&osa, args->oact, sizeof(l_sigaction_t));
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}
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return (error);
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}
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static int
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linux_do_sigprocmask(struct thread *td, int how, l_sigset_t *new,
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l_sigset_t *old)
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{
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sigset_t omask, nmask;
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sigset_t *nmaskp;
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int error;
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td->td_retval[0] = 0;
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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 (new != NULL) {
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linux_to_bsd_sigset(new, &nmask);
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nmaskp = &nmask;
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} else
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nmaskp = NULL;
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error = kern_sigprocmask(td, how, nmaskp, &omask, 0);
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if (error == 0 && old != NULL)
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bsd_to_linux_sigset(&omask, old);
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return (error);
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}
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#ifndef __alpha__
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int
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linux_sigprocmask(struct thread *td, struct linux_sigprocmask_args *args)
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{
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l_osigset_t mask;
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l_sigset_t set, oset;
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int error;
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#ifdef DEBUG
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if (ldebug(sigprocmask))
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printf(ARGS(sigprocmask, "%d, *, *"), args->how);
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#endif
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if (args->mask != NULL) {
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error = copyin(args->mask, &mask, sizeof(l_osigset_t));
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if (error)
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return (error);
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LINUX_SIGEMPTYSET(set);
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set.__bits[0] = mask;
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}
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error = linux_do_sigprocmask(td, args->how,
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args->mask ? &set : NULL,
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args->omask ? &oset : NULL);
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if (args->omask != NULL && !error) {
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mask = oset.__bits[0];
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error = copyout(&mask, args->omask, sizeof(l_osigset_t));
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}
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return (error);
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}
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#endif /*!__alpha__*/
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int
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linux_rt_sigprocmask(struct thread *td, struct linux_rt_sigprocmask_args *args)
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{
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l_sigset_t set, oset;
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int error;
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#ifdef DEBUG
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if (ldebug(rt_sigprocmask))
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printf(ARGS(rt_sigprocmask, "%d, %p, %p, %ld"),
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args->how, (void *)args->mask,
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(void *)args->omask, (long)args->sigsetsize);
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#endif
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if (args->sigsetsize != sizeof(l_sigset_t))
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return EINVAL;
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if (args->mask != NULL) {
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error = copyin(args->mask, &set, sizeof(l_sigset_t));
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if (error)
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return (error);
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}
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error = linux_do_sigprocmask(td, args->how,
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args->mask ? &set : NULL,
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args->omask ? &oset : NULL);
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if (args->omask != NULL && !error) {
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error = copyout(&oset, args->omask, sizeof(l_sigset_t));
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}
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return (error);
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}
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#ifndef __alpha__
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int
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linux_sgetmask(struct thread *td, struct linux_sgetmask_args *args)
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{
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struct proc *p = td->td_proc;
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l_sigset_t mask;
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#ifdef DEBUG
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if (ldebug(sgetmask))
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printf(ARGS(sgetmask, ""));
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#endif
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PROC_LOCK(p);
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bsd_to_linux_sigset(&td->td_sigmask, &mask);
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PROC_UNLOCK(p);
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td->td_retval[0] = mask.__bits[0];
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return (0);
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}
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int
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linux_ssetmask(struct thread *td, struct linux_ssetmask_args *args)
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{
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struct proc *p = td->td_proc;
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l_sigset_t lset;
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sigset_t bset;
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#ifdef DEBUG
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if (ldebug(ssetmask))
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printf(ARGS(ssetmask, "%08lx"), (unsigned long)args->mask);
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#endif
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PROC_LOCK(p);
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bsd_to_linux_sigset(&td->td_sigmask, &lset);
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td->td_retval[0] = lset.__bits[0];
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LINUX_SIGEMPTYSET(lset);
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lset.__bits[0] = args->mask;
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linux_to_bsd_sigset(&lset, &bset);
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td->td_sigmask = bset;
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SIG_CANTMASK(td->td_sigmask);
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signotify(td);
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PROC_UNLOCK(p);
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return (0);
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}
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/*
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* MPSAFE
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*/
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int
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linux_sigpending(struct thread *td, struct linux_sigpending_args *args)
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{
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struct proc *p = td->td_proc;
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sigset_t bset;
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l_sigset_t lset;
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l_osigset_t mask;
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#ifdef DEBUG
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if (ldebug(sigpending))
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printf(ARGS(sigpending, "*"));
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#endif
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PROC_LOCK(p);
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bset = p->p_siglist;
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SIGSETOR(bset, td->td_siglist);
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SIGSETAND(bset, td->td_sigmask);
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PROC_UNLOCK(p);
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bsd_to_linux_sigset(&bset, &lset);
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mask = lset.__bits[0];
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return (copyout(&mask, args->mask, sizeof(mask)));
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}
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#endif /*!__alpha__*/
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int
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linux_kill(struct thread *td, struct linux_kill_args *args)
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{
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struct kill_args /* {
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int pid;
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int signum;
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} */ tmp;
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#ifdef DEBUG
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if (ldebug(kill))
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printf(ARGS(kill, "%d, %d"), args->pid, args->signum);
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#endif
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/*
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* Allow signal 0 as a means to check for privileges
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*/
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if (args->signum < 0 || args->signum > LINUX_NSIG)
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return EINVAL;
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#ifndef __alpha__
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if (args->signum > 0 && args->signum <= LINUX_SIGTBLSZ)
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tmp.signum = linux_to_bsd_signal[_SIG_IDX(args->signum)];
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else
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#endif
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tmp.signum = args->signum;
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tmp.pid = args->pid;
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return (kill(td, &tmp));
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}
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