/* $NetBSD: linux32_signal.c,v 1.10 2009/01/20 20:47:33 christos Exp $ */
/*-
* Copyright (c) 2006 Emmanuel Dreyfus, 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.
* 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 Emmanuel Dreyfus
* 4. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux32_signal.c,v 1.10 2009/01/20 20:47:33 christos Exp $");
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/signalvar.h>
#include <sys/lwp.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <compat/netbsd32/netbsd32.h>
#include <compat/linux32/common/linux32_types.h>
#include <compat/linux32/common/linux32_signal.h>
#include <compat/linux32/linux32_syscallargs.h>
#define linux32_sigemptyset(s) memset((s), 0, sizeof(*(s)))
#define linux32_sigismember(s, n) ((s)->sig[((n) - 1) / LINUX32__NSIG_BPW] \
& (1 << ((n) - 1) % LINUX32__NSIG_BPW))
#define linux32_sigaddset(s, n) ((s)->sig[((n) - 1) / LINUX32__NSIG_BPW] \
|= (1 << ((n) - 1) % LINUX32__NSIG_BPW))
extern const int native_to_linux32_signo[];
extern const int linux32_to_native_signo[];
#ifdef DEBUG_LINUX
#define DPRINTF(a) uprintf a
#else
#define DPRINTF(a)
#endif
void
linux32_to_native_sigset(sigset_t *bss, const linux32_sigset_t *lss)
{
int i, newsig;
sigemptyset(bss);
for (i = 1; i < LINUX32__NSIG; i++) {
if (linux32_sigismember(lss, i)) {
newsig = linux32_to_native_signo[i];
if (newsig)
sigaddset(bss, newsig);
}
}
}
void
native_to_linux32_sigset(linux32_sigset_t *lss, const sigset_t *bss)
{
int i, newsig;
linux32_sigemptyset(lss);
for (i = 1; i < NSIG; i++) {
if (sigismember(bss, i)) {
newsig = native_to_linux32_signo[i];
if (newsig)
linux32_sigaddset(lss, newsig);
}
}
}
unsigned int
native_to_linux32_sigflags(const int bsf)
{
unsigned int lsf = 0;
if ((bsf & SA_NOCLDSTOP) != 0)
lsf |= LINUX32_SA_NOCLDSTOP;
if ((bsf & SA_NOCLDWAIT) != 0)
lsf |= LINUX32_SA_NOCLDWAIT;
if ((bsf & SA_ONSTACK) != 0)
lsf |= LINUX32_SA_ONSTACK;
if ((bsf & SA_RESTART) != 0)
lsf |= LINUX32_SA_RESTART;
if ((bsf & SA_NODEFER) != 0)
lsf |= LINUX32_SA_NOMASK;
if ((bsf & SA_RESETHAND) != 0)
lsf |= LINUX32_SA_ONESHOT;
if ((bsf & SA_SIGINFO) != 0)
lsf |= LINUX32_SA_SIGINFO;
return lsf;
}
int
linux32_to_native_sigflags(const unsigned long lsf)
{
int bsf = 0;
if ((lsf & LINUX32_SA_NOCLDSTOP) != 0)
bsf |= SA_NOCLDSTOP;
if ((lsf & LINUX32_SA_NOCLDWAIT) != 0)
bsf |= SA_NOCLDWAIT;
if ((lsf & LINUX32_SA_ONSTACK) != 0)
bsf |= SA_ONSTACK;
if ((lsf & LINUX32_SA_RESTART) != 0)
bsf |= SA_RESTART;
if ((lsf & LINUX32_SA_ONESHOT) != 0)
bsf |= SA_RESETHAND;
if ((lsf & LINUX32_SA_NOMASK) != 0)
bsf |= SA_NODEFER;
if ((lsf & LINUX32_SA_SIGINFO) != 0)
bsf |= SA_SIGINFO;
if ((lsf & ~LINUX32_SA_ALLBITS) != 0) {
#ifdef DEBUG_LINUX
printf("linux32_old_to_native_sigflags: "
"%lx extra bits ignored\n", lsf);
#endif
}
return bsf;
}
void
linux32_to_native_sigaction(struct sigaction *bsa, const struct linux32_sigaction *lsa)
{
bsa->sa_handler = NETBSD32PTR64(lsa->linux_sa_handler);
linux32_to_native_sigset(&bsa->sa_mask, &lsa->linux_sa_mask);
bsa->sa_flags = linux32_to_native_sigflags(lsa->linux_sa_flags);
}
void
native_to_linux32_sigaction(struct linux32_sigaction *lsa, const struct sigaction *bsa)
{
NETBSD32PTR32(lsa->linux_sa_handler, bsa->sa_handler);
native_to_linux32_sigset(&lsa->linux_sa_mask, &bsa->sa_mask);
lsa->linux_sa_flags = native_to_linux32_sigflags(bsa->sa_flags);
NETBSD32PTR32(lsa->linux_sa_restorer, NULL);
}
void
native_to_linux32_sigaltstack(struct linux32_sigaltstack *lss, const struct sigaltstack *bss)
{
NETBSD32PTR32(lss->ss_sp, bss->ss_sp);
lss->ss_size = bss->ss_size;
if (bss->ss_flags & SS_ONSTACK)
lss->ss_flags = LINUX32_SS_ONSTACK;
else if (bss->ss_flags & SS_DISABLE)
lss->ss_flags = LINUX32_SS_DISABLE;
else
lss->ss_flags = 0;
}
void
native_to_linux32_old_sigset(linux32_old_sigset_t *lss, const sigset_t *bss)
{
linux32_sigset_t lsnew;
native_to_linux32_sigset(&lsnew, bss);
/* convert new sigset to old sigset */
*lss = lsnew.sig[0];
}
void
linux32_old_to_native_sigset(sigset_t *bss, const linux32_old_sigset_t *lss)
{
linux32_sigset_t ls;
bzero(&ls, sizeof(ls));
ls.sig[0] = *lss;
linux32_to_native_sigset(bss, &ls);
}
int
linux32_sys_rt_sigaction(struct lwp *l, const struct linux32_sys_rt_sigaction_args *uap, register_t *retval)
{
/* {
syscallarg(int) signum;
syscallarg(const linux32_sigactionp_t) nsa;
syscallarg(linux32_sigactionp_t) osa;
syscallarg(netbsd32_size_t) sigsetsize;
} */
struct linux32_sigaction nls32;
struct linux32_sigaction ols32;
struct sigaction ns;
struct sigaction os;
int error;
int sig;
int vers = 0;
void *tramp = NULL;
if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t)) {
DPRINTF(("rt_sigaction: Inconsistent sigsetsize %u %zu\n",
SCARG(uap, sigsetsize), sizeof(linux32_sigset_t)));
return EINVAL;
}
if (SCARG_P32(uap, nsa) != NULL) {
if ((error = copyin(SCARG_P32(uap, nsa),
&nls32, sizeof(nls32))) != 0) {
DPRINTF(("rt_sigaction: Copyin %d\n", error));
return error;
}
linux32_to_native_sigaction(&ns, &nls32);
}
sig = SCARG(uap, signum);
if (sig < 0 || sig >= LINUX32__NSIG) {
DPRINTF(("rt_sigaction: Bad signal number %d %d\n",
sig, LINUX32__NSIG));
return EINVAL;
}
if (sig > 0 && !linux32_to_native_signo[sig]) {
/* unknown signal... */
os.sa_handler = SIG_IGN;
sigemptyset(&os.sa_mask);
os.sa_flags = 0;
} else {
if ((error = sigaction1(l,
linux32_to_native_signo[sig],
SCARG_P32(uap, nsa) ? &ns : NULL,
SCARG_P32(uap, osa) ? &os : NULL,
tramp, vers)) != 0) {
DPRINTF(("rt_sigaction: sigaction %d\n", error));
return error;
}
}
if (SCARG_P32(uap, osa) != NULL) {
native_to_linux32_sigaction(&ols32, &os);
if ((error = copyout(&ols32, SCARG_P32(uap, osa),
sizeof(ols32))) != 0) {
DPRINTF(("rt_sigaction: Copyout %d\n", error));
return error;
}
}
return 0;
}
int
linux32_sys_rt_sigprocmask(struct lwp *l, const struct linux32_sys_rt_sigprocmask_args *uap, register_t *retval)
{
/* {
syscallarg(int) how;
syscallarg(const linux32_sigsetp_t) set;
syscallarg(linux32_sigsetp_t) oset;
syscallarg(netbsd32_size_t) sigsetsize;
} */
struct proc *p = l->l_proc;
linux32_sigset_t nls32, ols32;
sigset_t ns, os;
int error;
int how;
if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t))
return EINVAL;
switch (SCARG(uap, how)) {
case LINUX32_SIG_BLOCK:
how = SIG_BLOCK;
break;
case LINUX32_SIG_UNBLOCK:
how = SIG_UNBLOCK;
break;
case LINUX32_SIG_SETMASK:
how = SIG_SETMASK;
break;
default:
return EINVAL;
break;
}
if (SCARG_P32(uap, set) != NULL) {
if ((error = copyin(SCARG_P32(uap, set),
&nls32, sizeof(nls32))) != 0)
return error;
linux32_to_native_sigset(&ns, &nls32);
}
mutex_enter(p->p_lock);
error = sigprocmask1(l, how,
SCARG_P32(uap, set) ? &ns : NULL,
SCARG_P32(uap, oset) ? &os : NULL);
mutex_exit(p->p_lock);
if (error != 0)
return error;
if (SCARG_P32(uap, oset) != NULL) {
native_to_linux32_sigset(&ols32, &os);
if ((error = copyout(&ols32,
SCARG_P32(uap, oset), sizeof(ols32))) != 0)
return error;
}
return 0;
}
int
linux32_sys_kill(struct lwp *l, const struct linux32_sys_kill_args *uap, register_t *retval)
{
/* {
syscallarg(int) pid;
syscallarg(int) signum;
} */
struct sys_kill_args ka;
int sig;
SCARG(&ka, pid) = SCARG(uap, pid);
sig = SCARG(uap, signum);
if (sig < 0 || sig >= LINUX32__NSIG)
return (EINVAL);
SCARG(&ka, signum) = linux32_to_native_signo[sig];
return sys_kill(l, &ka, retval);
}
int
linux32_sys_rt_sigsuspend(struct lwp *l, const struct linux32_sys_rt_sigsuspend_args *uap, register_t *retval)
{
/* {
syscallarg(linux32_sigsetp_t) unewset;
syscallarg(netbsd32_size_t) sigsetsize;
} */
linux32_sigset_t lss;
sigset_t bss;
int error;
if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t))
return EINVAL;
if ((error = copyin(SCARG_P32(uap, unewset),
&lss, sizeof(linux32_sigset_t))) != 0)
return error;
linux32_to_native_sigset(&bss, &lss);
return sigsuspend1(l, &bss);
}
int
linux32_sys_signal(struct lwp *l, const struct linux32_sys_signal_args *uap, register_t *retval)
{
/* {
syscallarg(int) signum;
syscallarg(linux32_handler_t) handler;
} */
struct sigaction nbsa, obsa;
int error, sig;
*retval = -1;
sig = SCARG(uap, signum);
if (sig < 0 || sig >= LINUX32__NSIG)
return EINVAL;
nbsa.sa_handler = SCARG_P32(uap, handler);
sigemptyset(&nbsa.sa_mask);
nbsa.sa_flags = SA_RESETHAND | SA_NODEFER;
if ((error = sigaction1(l, linux32_to_native_signo[sig],
&nbsa, &obsa, NULL, 0)) != 0)
return error;
*retval = (int)(long)obsa.sa_handler;
return 0;
}
int
linux32_sys_rt_sigpending(struct lwp *l, const struct linux32_sys_rt_sigpending_args *uap, register_t *retval)
{
/* {
syscallarg(linux32_sigsetp_t) set;
syscallarg(netbsd32_size_t) sigsetsize;
} */
sigset_t bss;
linux32_sigset_t lss;
if (SCARG(uap, sigsetsize) != sizeof(linux32_sigset_t))
return EINVAL;
sigpending1(l, &bss);
native_to_linux32_sigset(&lss, &bss);
return copyout(&lss, SCARG_P32(uap, set), sizeof(lss));
}