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-rw-r--r--sys/i386/linux/linux_signal.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/sys/i386/linux/linux_signal.c b/sys/i386/linux/linux_signal.c
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+++ b/sys/i386/linux/linux_signal.c
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+/*-
+ * Copyright (c) 1994-1995 Søren Schmidt
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer
+ * in this position and unchanged.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software withough specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id: linux_signal.c,v 1.2 1995/06/07 21:27:57 sos Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/exec.h>
+#include <sys/signal.h>
+#include <sys/signalvar.h>
+
+#include <vm/vm.h>
+
+#include <i386/linux/linux.h>
+
+#define DONTMASK (sigmask(SIGKILL)|sigmask(SIGSTOP)|sigmask(SIGCHLD))
+
+static sigset_t
+linux_to_bsd_sigmask(linux_sigset_t mask) {
+ int i;
+ sigset_t new = 0;
+
+ for (i = 1; i <= LINUX_NSIG; i++)
+ if (mask & (1 << i-1))
+ new |= (1 << (linux_to_bsd_signal[i]-1));
+ return new;
+}
+
+static linux_sigset_t
+bsd_to_linux_sigmask(sigset_t mask) {
+ int i;
+ sigset_t new = 0;
+
+ for (i = 1; i <= NSIG; i++)
+ if (mask & (1 << i-1))
+ new |= (1 << (bsd_to_linux_signal[i]-1));
+ return new;
+}
+
+struct linux_sigaction_args {
+ int sig;
+ linux_sigaction_t *nsa;
+ linux_sigaction_t *osa;
+};
+
+int
+linux_sigaction(struct proc *p, struct linux_sigaction_args *args, int *retval)
+{
+ linux_sigaction_t linux_sa;
+ struct sigaction *nsa = NULL, *osa = NULL, bsd_sa;
+ struct sigaction_args {
+ int sig;
+ struct sigaction *nsa;
+ struct sigaction *osa;
+ } sa;
+ int error;
+
+#ifdef DEBUG
+ printf("Linux-emul(%d): sigaction(%d, *, *)\n", p->p_pid, args->sig);
+#endif
+ if (args->osa)
+ osa = (struct sigaction *)ua_alloc_init(sizeof(struct sigaction));
+
+ if (args->nsa) {
+ nsa = (struct sigaction *)ua_alloc(sizeof(struct sigaction));
+ if (error = copyin(args->nsa, &linux_sa, sizeof(linux_sigaction_t)))
+ return error;
+ bsd_sa.sa_mask = linux_to_bsd_sigmask(linux_sa.sa_mask);
+ bsd_sa.sa_handler = linux_sa.sa_handler;
+ bsd_sa.sa_flags = 0;
+ if (linux_sa.sa_flags & LINUX_SA_NOCLDSTOP)
+ bsd_sa.sa_flags |= SA_NOCLDSTOP;
+ if (linux_sa.sa_flags & LINUX_SA_ONSTACK)
+ bsd_sa.sa_flags |= SA_ONSTACK;
+ if (linux_sa.sa_flags & LINUX_SA_RESTART)
+ bsd_sa.sa_flags |= SA_RESTART;
+ if (error = copyout(&bsd_sa, nsa, sizeof(struct sigaction)))
+ return error;
+ }
+ sa.sig = linux_to_bsd_signal[args->sig];
+ sa.nsa = nsa;
+ sa.osa = osa;
+ if ((error = sigaction(p, &sa, retval)))
+ return error;
+
+ if (args->osa) {
+ if (error = copyin(osa, &bsd_sa, sizeof(struct sigaction)))
+ return error;
+ linux_sa.sa_handler = bsd_sa.sa_handler;
+ linux_sa.sa_restorer = NULL;
+ linux_sa.sa_mask = bsd_to_linux_sigmask(bsd_sa.sa_mask);
+ linux_sa.sa_flags = 0;
+ if (bsd_sa.sa_flags & SA_NOCLDSTOP)
+ linux_sa.sa_flags |= LINUX_SA_NOCLDSTOP;
+ if (bsd_sa.sa_flags & SA_ONSTACK)
+ linux_sa.sa_flags |= LINUX_SA_ONSTACK;
+ if (bsd_sa.sa_flags & SA_RESTART)
+ linux_sa.sa_flags |= LINUX_SA_RESTART;
+ if (error = copyout(&linux_sa, args->osa, sizeof(linux_sigaction_t)))
+ return error;
+ }
+ return 0;
+}
+
+struct linux_sigprocmask_args {
+ int how;
+ linux_sigset_t *mask;
+ linux_sigset_t *omask;
+};
+
+int
+linux_sigprocmask(struct proc *p, struct linux_sigprocmask_args *args,
+ int *retval)
+{
+ int error, s;
+ sigset_t mask;
+ sigset_t omask;
+
+#ifdef DEBUG
+ printf("Linux-emul(%d): sigprocmask(%d, *, *)\n", p->p_pid, args->how);
+#endif
+ if (args->omask != NULL) {
+ omask = bsd_to_linux_sigmask(p->p_sigmask);
+ if (error = copyout(&omask, args->omask, sizeof(sigset_t)))
+ return error;
+ }
+ if (!(args->mask))
+ return 0;
+ if (error = copyin(args->mask, &mask, sizeof(linux_sigset_t)))
+ return error;
+
+ mask = linux_to_bsd_sigmask(mask);
+ s = splhigh();
+ switch (args->how) {
+ case LINUX_SIG_BLOCK:
+ p->p_sigmask |= (mask & ~DONTMASK);
+ break;
+ case LINUX_SIG_UNBLOCK:
+ p->p_sigmask &= ~mask;
+ break;
+ case LINUX_SIG_SETMASK:
+ p->p_sigmask = (mask & ~DONTMASK);
+ break;
+ default:
+ error = EINVAL;
+ break;
+ }
+ splx(s);
+ return error;
+}
+
+int
+linux_siggetmask(struct proc *p, void *args, int *retval)
+{
+#ifdef DEBUG
+ printf("Linux-emul(%d): siggetmask()\n", p->p_pid);
+#endif
+ *retval = bsd_to_linux_sigmask(p->p_sigmask);
+ return 0;
+}
+
+struct linux_sigsetmask_args {
+ linux_sigset_t mask;
+};
+
+int
+linux_sigsetmask(struct proc *p, struct linux_sigsetmask_args *args,int *retval)
+{
+ int s;
+
+#ifdef DEBUG
+ printf("Linux-emul(%d): sigsetmask(%08x)\n", p->p_pid, args->mask);
+#endif
+ s = splhigh();
+ p->p_sigmask = (linux_to_bsd_sigmask(args->mask) & ~DONTMASK);
+ splx(s);
+ *retval = bsd_to_linux_sigmask(p->p_sigmask);
+ return 0;
+}
+
+struct linux_sigpending_args {
+ linux_sigset_t *mask;
+};
+
+int
+linux_sigpending(struct proc *p, struct linux_sigpending_args *args,int *retval)
+{
+ linux_sigset_t linux_sig;
+
+#ifdef DEBUG
+ printf("Linux-emul(%d): sigpending(*)\n", p->p_pid);
+#endif
+ linux_sig = bsd_to_linux_sigmask(p->p_siglist & p->p_sigmask);
+ return copyout(&linux_sig, args->mask, sizeof(linux_sig));
+}
+
+struct linux_sigsuspend_args {
+ linux_sigset_t mask;
+};
+
+int
+linux_sigsuspend(struct proc *p, struct linux_sigsuspend_args *args,int *retval)
+{
+ sigset_t tmp;
+
+#ifdef DEBUG
+ printf("Linux-emul(%d): sigsuspend(%08x)\n", p->p_pid, args->mask);
+#endif
+ tmp = linux_to_bsd_sigmask(args->mask);
+ return sigsuspend(p, &tmp , retval);
+}
+
+struct linux_kill_args {
+ int pid;
+ int signum;
+};
+
+int
+linux_kill(struct proc *p, struct linux_kill_args *args, int *retval)
+{
+ struct {
+ int pid;
+ int signum;
+ } tmp;
+
+#ifdef DEBUG
+ printf("Linux-emul(%d): kill(%d, %d)\n",
+ p->p_pid, args->pid, args->signum);
+#endif
+ tmp.pid = args->pid;
+ tmp.signum = linux_to_bsd_signal[args->signum];
+ return kill(p, &tmp, retval);
+}
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