NetBSD/sys/compat/linux/common/linux_signal.c

550 lines
14 KiB
C

/* $NetBSD: linux_signal.c,v 1.21 1998/12/19 16:27:10 drochner Exp $ */
/*-
* Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz.
*
* 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.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* heavily from: svr4_signal.c,v 1.7 1995/01/09 01:04:21 christos Exp
*/
/*
* Functions in multiarch:
* linux_sys_signal : linux_sig_notalpha.c
* linux_sys_siggetmask : linux_sig_notalpha.c
* linux_sys_sigsetmask : linux_sig_notalpha.c
* linux_sys_pause : linux_sig_notalpha.c
* linux_sys_sigaction : linux_sigaction.c
*
*/
/*
* Unimplemented:
* linux_sys_rt_sigtimedwait : sigsuspend w/timeout.
*/
#define COMPAT_LINUX 1
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/kernel.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/malloc.h>
#include <sys/syscallargs.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/common/linux_siginfo.h>
#include <compat/linux/common/linux_util.h>
#include <compat/linux/linux_syscallargs.h>
/* Locally used defines (in bsd<->linux conversion functions): */
#define linux_sigemptyset(s) memset((s), 0, sizeof(*(s)))
#define linux_sigismember(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \
& (1 << ((n) - 1) % LINUX__NSIG_BPW))
#define linux_sigaddset(s, n) ((s)->sig[((n) - 1) / LINUX__NSIG_BPW] \
|= (1 << ((n) - 1) % LINUX__NSIG_BPW))
/* Note: linux_to_native_sig[] is in <arch>/linux_sigarray.c */
int native_to_linux_sig[NSIG] = {
0,
LINUX_SIGHUP,
LINUX_SIGINT,
LINUX_SIGQUIT,
LINUX_SIGILL,
LINUX_SIGTRAP,
LINUX_SIGABRT,
0, /* SIGEMT */
LINUX_SIGFPE,
LINUX_SIGKILL,
LINUX_SIGBUS,
LINUX_SIGSEGV,
0, /* SIGSEGV */
LINUX_SIGPIPE,
LINUX_SIGALRM,
LINUX_SIGTERM,
LINUX_SIGURG,
LINUX_SIGSTOP,
LINUX_SIGTSTP,
LINUX_SIGCONT,
LINUX_SIGCHLD,
LINUX_SIGTTIN,
LINUX_SIGTTOU,
LINUX_SIGIO,
LINUX_SIGXCPU,
LINUX_SIGXFSZ,
LINUX_SIGVTALRM,
LINUX_SIGPROF,
LINUX_SIGWINCH,
0, /* SIGINFO */
LINUX_SIGUSR1,
LINUX_SIGUSR2,
LINUX_SIGPWR,
};
/*
* Convert between Linux and BSD signal sets.
*/
#if LINUX__NSIG_WORDS > 1
void
linux_old_extra_to_native_sigset(lss, extra, bss)
const linux_old_sigset_t *lss;
const unsigned long *extra;
sigset_t *bss;
{
linux_sigset_t lsnew;
/* convert old sigset to new sigset */
linux_sigemptyset(&lsnew);
lsnew.sig[0] = *lss;
if (extra)
bcopy(extra, &lsnew.sig[1],
sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t));
linux_to_native_sigset(&lsnew, bss);
}
void
native_to_linux_old_extra_sigset(bss, lss, extra)
const sigset_t *bss;
linux_old_sigset_t *lss;
unsigned long *extra;
{
linux_sigset_t lsnew;
native_to_linux_sigset(bss, &lsnew);
/* convert new sigset to old sigset */
*lss = lsnew.sig[0];
if (extra)
bcopy(&lsnew.sig[1], extra,
sizeof(linux_sigset_t) - sizeof(linux_old_sigset_t));
}
#endif
void
linux_to_native_sigset(lss, bss)
const linux_sigset_t *lss;
sigset_t *bss;
{
int i, newsig;
sigemptyset(bss);
for (i = 1; i < LINUX__NSIG; i++) {
if (linux_sigismember(lss, i)) {
newsig = linux_to_native_sig[i];
if (newsig)
sigaddset(bss, newsig);
}
}
}
void
native_to_linux_sigset(bss, lss)
const sigset_t *bss;
linux_sigset_t *lss;
{
int i, newsig;
linux_sigemptyset(lss);
for (i = 1; i < NSIG; i++) {
if (sigismember(bss, i)) {
newsig = native_to_linux_sig[i];
if (newsig)
linux_sigaddset(lss, newsig);
}
}
}
/*
* Convert between Linux and BSD sigaction structures. Linux sometimes
* has one extra field (sa_restorer) which we don't support.
*/
void
linux_old_to_native_sigaction(lsa, bsa)
struct linux_old_sigaction *lsa;
struct sigaction *bsa;
{
bsa->sa_handler = lsa->sa_handler;
linux_old_to_native_sigset(&lsa->sa_mask, &bsa->sa_mask);
bsa->sa_flags = 0;
if ((lsa->sa_flags & LINUX_SA_NOCLDSTOP) != 0)
bsa->sa_flags |= SA_NOCLDSTOP;
if ((lsa->sa_flags & LINUX_SA_ONSTACK) != 0)
bsa->sa_flags |= SA_ONSTACK;
if ((lsa->sa_flags & LINUX_SA_RESTART) != 0)
bsa->sa_flags |= SA_RESTART;
if ((lsa->sa_flags & LINUX_SA_ONESHOT) != 0)
bsa->sa_flags |= SA_RESETHAND;
if ((lsa->sa_flags & LINUX_SA_NOMASK) != 0)
bsa->sa_flags |= SA_NODEFER;
if ((lsa->sa_flags & LINUX_SA_SIGINFO) != 0)
bsa->sa_flags |= SA_SIGINFO;
#ifdef DEBUG
if ((lsa->sa_flags & ~LINUX_SA_ALLBITS) != 0)
/*XXX*/ printf("linux_old_to_native_sigaction: extra bits ignored\n");
if (lsa->sa_restorer != 0)
/*XXX*/ printf("linux_old_to_native_sigaction: sa_restorer ignored\n");
#endif
}
void
native_to_linux_old_sigaction(bsa, lsa)
struct sigaction *bsa;
struct linux_old_sigaction *lsa;
{
/* Clear sa_flags and sa_restorer (if it exists) */
bzero(lsa, sizeof(struct linux_old_sigaction));
/* ...and fill in the mask and flags */
native_to_linux_old_sigset(&bsa->sa_mask, &lsa->sa_mask);
if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
lsa->sa_flags |= LINUX_SA_NOCLDSTOP;
if ((bsa->sa_flags & SA_ONSTACK) != 0)
lsa->sa_flags |= LINUX_SA_ONSTACK;
if ((bsa->sa_flags & SA_RESTART) != 0)
lsa->sa_flags |= LINUX_SA_RESTART;
if ((bsa->sa_flags & SA_NODEFER) != 0)
lsa->sa_flags |= LINUX_SA_NOMASK;
if ((bsa->sa_flags & SA_RESETHAND) != 0)
lsa->sa_flags |= LINUX_SA_ONESHOT;
if ((bsa->sa_flags & SA_SIGINFO) != 0)
lsa->sa_flags |= LINUX_SA_SIGINFO;
lsa->sa_handler = bsa->sa_handler;
}
/* ...and the new sigaction conversion funcs. */
void
linux_to_native_sigaction(lsa, bsa)
struct linux_sigaction *lsa;
struct sigaction *bsa;
{
bsa->sa_handler = lsa->sa_handler;
linux_to_native_sigset(&lsa->sa_mask, &bsa->sa_mask);
bsa->sa_flags = 0;
if ((lsa->sa_flags & LINUX_SA_NOCLDSTOP) != 0)
bsa->sa_flags |= SA_NOCLDSTOP;
if ((lsa->sa_flags & LINUX_SA_ONSTACK) != 0)
bsa->sa_flags |= SA_ONSTACK;
if ((lsa->sa_flags & LINUX_SA_RESTART) != 0)
bsa->sa_flags |= SA_RESTART;
if ((lsa->sa_flags & LINUX_SA_ONESHOT) != 0)
bsa->sa_flags |= SA_RESETHAND;
if ((lsa->sa_flags & LINUX_SA_NOMASK) != 0)
bsa->sa_flags |= SA_NODEFER;
if ((lsa->sa_flags & LINUX_SA_SIGINFO) != 0)
bsa->sa_flags |= SA_SIGINFO;
#ifdef DEBUG
if ((lsa->sa_flags & ~LINUX_SA_ALLBITS) != 0)
/*XXX*/ printf("linux_to_native_sigaction: extra bits ignored\n");
if (lsa->sa_restorer != 0)
/*XXX*/ printf("linux_to_native_sigaction: sa_restorer ignored\n");
#endif
}
void
native_to_linux_sigaction(bsa, lsa)
struct sigaction *bsa;
struct linux_sigaction *lsa;
{
/* Clear sa_flags and sa_restorer (if it exists) */
bzero(lsa, sizeof(struct linux_sigaction));
/* ...and fill in the mask and flags */
native_to_linux_sigset(&bsa->sa_mask, &lsa->sa_mask);
if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
lsa->sa_flags |= LINUX_SA_NOCLDSTOP;
if ((bsa->sa_flags & SA_ONSTACK) != 0)
lsa->sa_flags |= LINUX_SA_ONSTACK;
if ((bsa->sa_flags & SA_RESTART) != 0)
lsa->sa_flags |= LINUX_SA_RESTART;
if ((bsa->sa_flags & SA_NODEFER) != 0)
lsa->sa_flags |= LINUX_SA_NOMASK;
if ((bsa->sa_flags & SA_RESETHAND) != 0)
lsa->sa_flags |= LINUX_SA_ONESHOT;
if ((bsa->sa_flags & SA_SIGINFO) != 0)
lsa->sa_flags |= LINUX_SA_SIGINFO;
lsa->sa_handler = bsa->sa_handler;
}
/* ----------------------------------------------------------------------- */
/*
* The Linux sigaction() system call. Do the usual conversions,
* and just call sigaction(). Some flags and values are silently
* ignored (see above).
*/
int
linux_sys_rt_sigaction(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_rt_sigaction_args /* {
syscallarg(int) signum;
syscallarg(const struct linux_sigaction *) nsa;
syscallarg(struct linux_sigaction *) osa;
syscallarg(size_t) sigsetsize;
} */ *uap = v;
struct linux_sigaction nlsa, olsa;
struct sigaction nbsa, obsa;
int error;
/* XXX XAX linux_sigset_t or struct linux_sigaction here? */
if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
return (EINVAL);
if (SCARG(uap, nsa)) {
error = copyin(SCARG(uap, nsa), &nlsa, sizeof(nlsa));
if (error)
return (error);
linux_to_native_sigaction(&nlsa, &nbsa);
}
error = sigaction1(p, linux_to_native_sig[SCARG(uap, signum)],
SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0);
if (error)
return (error);
if (SCARG(uap, osa)) {
native_to_linux_sigaction(&obsa, &olsa);
error = copyout(&olsa, SCARG(uap, osa), sizeof(olsa));
if (error)
return (error);
}
return (0);
}
int
linux_sigprocmask1(p, how, set, oset)
register struct proc *p;
int how;
const linux_old_sigset_t *set;
linux_old_sigset_t *oset;
{
linux_old_sigset_t nlss, olss;
sigset_t nbss, obss;
int error;
switch (how) {
case LINUX_SIG_BLOCK:
how = SIG_BLOCK;
break;
case LINUX_SIG_UNBLOCK:
how = SIG_UNBLOCK;
break;
case LINUX_SIG_SETMASK:
how = SIG_SETMASK;
break;
default:
return (EINVAL);
}
if (set) {
error = copyin(set, &nlss, sizeof(nlss));
if (error)
return (error);
linux_old_to_native_sigset(&nlss, &nbss);
}
error = sigprocmask1(p, how,
set ? &nbss : 0, oset ? &obss : 0);
if (error)
return (error);
if (oset) {
native_to_linux_old_sigset(&obss, &olss);
error = copyout(&olss, oset, sizeof(olss));
if (error)
return (error);
}
return (error);
}
int
linux_sys_rt_sigprocmask(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_rt_sigprocmask_args /* {
syscallarg(int) how;
syscallarg(const linux_sigset_t *) set;
syscallarg(linux_sigset_t *) oset;
syscallarg(size_t) sigsetsize;
} */ *uap = v;
/* Use non-rt function: sigsetsize is ignored. */
/* Assume sizeof(linux_sigset_t) == sizeof(linux_old_sigset_t) */
if (SCARG(uap, sigsetsize) != sizeof(linux_old_sigset_t)) {
#ifdef LINUX_DEBUG
printf("linux_sys_rt_sigprocmask: sigsetsize != sizeof(old_sigset_t)");
#endif
return(ENOSYS);
}
return(linux_sigprocmask1(p, SCARG(uap, how),
(const linux_old_sigset_t *)SCARG(uap, set),
(linux_old_sigset_t *)SCARG(uap, oset)));
}
int
linux_sys_rt_sigpending(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_rt_sigpending_args /* {
syscallarg(linux_sigset_t *) set;
syscallarg(size_t) sigsetsize;
} */ *uap = v;
sigset_t bss;
linux_sigset_t lss;
if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
return (EINVAL);
sigpending1(p, &bss);
native_to_linux_sigset(&bss, &lss);
return copyout(&lss, SCARG(uap, set), sizeof(lss));
}
int
linux_sys_sigpending(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_sigpending_args /* {
syscallarg(linux_old_sigset_t *) mask;
} */ *uap = v;
sigset_t bss;
linux_old_sigset_t lss;
sigpending1(p, &bss);
native_to_linux_old_sigset(&bss, &lss);
return copyout(&lss, SCARG(uap, set), sizeof(lss));
}
int
linux_sys_sigsuspend(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_sigsuspend_args /* {
syscallarg(caddr_t) restart;
syscallarg(int) oldmask;
syscallarg(int) mask;
} */ *uap = v;
linux_old_sigset_t lss;
sigset_t bss;
lss = SCARG(uap, mask);
linux_old_to_native_sigset(&lss, &bss);
return (sigsuspend1(p, &bss));
}
int
linux_sys_rt_sigsuspend(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_rt_sigsuspend_args /* {
syscallarg(linux_sigset_t *) unewset;
syscallarg(size_t) sigsetsize;
} */ *uap = v;
linux_sigset_t lss;
sigset_t bss;
int error;
if (SCARG(uap, sigsetsize) != sizeof(linux_sigset_t))
return (EINVAL);
error = copyin(SCARG(uap, unewset), &lss, sizeof(linux_sigset_t));
if (error)
return (error);
linux_to_native_sigset(&lss, &bss);
return (sigsuspend1(p, &bss));
}
/*
* Once more: only a signal conversion is needed.
* Note: also used as sys_rt_queueinfo. The info field is ignored.
*/
int
linux_sys_rt_queueinfo(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
/* XXX XAX This isn't this really int, int, siginfo_t *, is it? */
#if 0
struct linux_sys_rt_queueinfo_args /* {
syscallarg(int) pid;
syscallarg(int) signum;
syscallarg(siginfo_t *) uinfo;
} */ *uap = v;
#endif
/* XXX To really implement this we need to */
/* XXX keep a list of queued signals somewhere. */
return (linux_sys_kill(p, v, retval));
}
int
linux_sys_kill(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct linux_sys_kill_args /* {
syscallarg(int) pid;
syscallarg(int) signum;
} */ *uap = v;
struct sys_kill_args ka;
SCARG(&ka, pid) = SCARG(uap, pid);
SCARG(&ka, signum) = linux_to_native_sig[SCARG(uap, signum)];
return sys_kill(p, &ka, retval);
}