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/*-
* Copyright (c) 1998 Mark Newton
* Copyright (c) 1994 Christos Zoulas
* 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. 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 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/compat/svr4/svr4_signal.c 225617 2011-09-16 13:58:51Z kmacy $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/filedesc.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/syscallsubr.h>
#include <sys/sysproto.h>
#include <machine/cpu.h>
#include <compat/svr4/svr4.h>
#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_signal.h>
#include <compat/svr4/svr4_proto.h>
#include <compat/svr4/svr4_util.h>
#include <compat/svr4/svr4_ucontext.h>
#define svr4_sigmask(n) (1 << (((n) - 1) & 31))
#define svr4_sigword(n) (((n) - 1) >> 5)
#define svr4_sigemptyset(s) memset((s), 0, sizeof(*(s)))
#define svr4_sigismember(s, n) ((s)->bits[svr4_sigword(n)] & svr4_sigmask(n))
#define svr4_sigaddset(s, n) ((s)->bits[svr4_sigword(n)] |= svr4_sigmask(n))
void svr4_to_bsd_sigaction(const struct svr4_sigaction *, struct sigaction *);
void bsd_to_svr4_sigaction(const struct sigaction *, struct svr4_sigaction *);
void svr4_sigfillset(svr4_sigset_t *);
int bsd_to_svr4_sig[SVR4_NSIG] = {
0,
SVR4_SIGHUP,
SVR4_SIGINT,
SVR4_SIGQUIT,
SVR4_SIGILL,
SVR4_SIGTRAP,
SVR4_SIGABRT,
SVR4_SIGEMT,
SVR4_SIGFPE,
SVR4_SIGKILL,
SVR4_SIGBUS,
SVR4_SIGSEGV,
SVR4_SIGSYS,
SVR4_SIGPIPE,
SVR4_SIGALRM,
SVR4_SIGTERM,
SVR4_SIGURG,
SVR4_SIGSTOP,
SVR4_SIGTSTP,
SVR4_SIGCONT,
SVR4_SIGCHLD,
SVR4_SIGTTIN,
SVR4_SIGTTOU,
SVR4_SIGIO,
SVR4_SIGXCPU,
SVR4_SIGXFSZ,
SVR4_SIGVTALRM,
SVR4_SIGPROF,
SVR4_SIGWINCH,
0, /* SIGINFO */
SVR4_SIGUSR1,
SVR4_SIGUSR2,
};
int svr4_to_bsd_sig[SVR4_NSIG] = {
0,
SIGHUP,
SIGINT,
SIGQUIT,
SIGILL,
SIGTRAP,
SIGABRT,
SIGEMT,
SIGFPE,
SIGKILL,
SIGBUS,
SIGSEGV,
SIGSYS,
SIGPIPE,
SIGALRM,
SIGTERM,
SIGUSR1,
SIGUSR2,
SIGCHLD,
0, /* XXX NetBSD uses SIGPWR here, but we don't seem to have one */
SIGWINCH,
SIGURG,
SIGIO,
SIGSTOP,
SIGTSTP,
SIGCONT,
SIGTTIN,
SIGTTOU,
SIGVTALRM,
SIGPROF,
SIGXCPU,
SIGXFSZ,
};
void
svr4_sigfillset(s)
svr4_sigset_t *s;
{
int i;
svr4_sigemptyset(s);
for (i = 1; i < SVR4_NSIG; i++)
if (svr4_to_bsd_sig[i] != 0)
svr4_sigaddset(s, i);
}
void
svr4_to_bsd_sigset(sss, bss)
const svr4_sigset_t *sss;
sigset_t *bss;
{
int i, newsig;
SIGEMPTYSET(*bss);
for (i = 1; i < SVR4_NSIG; i++)
if (svr4_sigismember(sss, i)) {
newsig = svr4_to_bsd_sig[i];
if (newsig)
SIGADDSET(*bss, newsig);
}
}
void
bsd_to_svr4_sigset(bss, sss)
const sigset_t *bss;
svr4_sigset_t *sss;
{
int i, newsig;
svr4_sigemptyset(sss);
for (i = 1; i < SVR4_NSIG; i++) {
if (SIGISMEMBER(*bss, i)) {
newsig = bsd_to_svr4_sig[i];
if (newsig)
svr4_sigaddset(sss, newsig);
}
}
}
/*
* XXX: Only a subset of the flags is currently implemented.
*/
void
svr4_to_bsd_sigaction(ssa, bsa)
const struct svr4_sigaction *ssa;
struct sigaction *bsa;
{
bsa->sa_handler = (sig_t) ssa->ssa_handler;
svr4_to_bsd_sigset(&ssa->ssa_mask, &bsa->sa_mask);
bsa->sa_flags = 0;
if ((ssa->ssa_flags & SVR4_SA_ONSTACK) != 0)
bsa->sa_flags |= SA_ONSTACK;
if ((ssa->ssa_flags & SVR4_SA_RESETHAND) != 0)
bsa->sa_flags |= SA_RESETHAND;
if ((ssa->ssa_flags & SVR4_SA_RESTART) != 0)
bsa->sa_flags |= SA_RESTART;
if ((ssa->ssa_flags & SVR4_SA_SIGINFO) != 0)
DPRINTF(("svr4_to_bsd_sigaction: SA_SIGINFO ignored\n"));
if ((ssa->ssa_flags & SVR4_SA_NOCLDSTOP) != 0)
bsa->sa_flags |= SA_NOCLDSTOP;
if ((ssa->ssa_flags & SVR4_SA_NODEFER) != 0)
bsa->sa_flags |= SA_NODEFER;
if ((ssa->ssa_flags & SVR4_SA_NOCLDWAIT) != 0)
bsa->sa_flags |= SA_NOCLDWAIT;
if ((ssa->ssa_flags & ~SVR4_SA_ALLBITS) != 0)
DPRINTF(("svr4_to_bsd_sigaction: extra bits ignored\n"));
}
void
bsd_to_svr4_sigaction(bsa, ssa)
const struct sigaction *bsa;
struct svr4_sigaction *ssa;
{
ssa->ssa_handler = (svr4_sig_t) bsa->sa_handler;
bsd_to_svr4_sigset(&bsa->sa_mask, &ssa->ssa_mask);
ssa->ssa_flags = 0;
if ((bsa->sa_flags & SA_ONSTACK) != 0)
ssa->ssa_flags |= SVR4_SA_ONSTACK;
if ((bsa->sa_flags & SA_RESETHAND) != 0)
ssa->ssa_flags |= SVR4_SA_RESETHAND;
if ((bsa->sa_flags & SA_RESTART) != 0)
ssa->ssa_flags |= SVR4_SA_RESTART;
if ((bsa->sa_flags & SA_NODEFER) != 0)
ssa->ssa_flags |= SVR4_SA_NODEFER;
if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
ssa->ssa_flags |= SVR4_SA_NOCLDSTOP;
}
void
svr4_to_bsd_sigaltstack(sss, bss)
const struct svr4_sigaltstack *sss;
struct sigaltstack *bss;
{
bss->ss_sp = sss->ss_sp;
bss->ss_size = sss->ss_size;
bss->ss_flags = 0;
if ((sss->ss_flags & SVR4_SS_DISABLE) != 0)
bss->ss_flags |= SS_DISABLE;
if ((sss->ss_flags & SVR4_SS_ONSTACK) != 0)
bss->ss_flags |= SS_ONSTACK;
if ((sss->ss_flags & ~SVR4_SS_ALLBITS) != 0)
/*XXX*/ uprintf("svr4_to_bsd_sigaltstack: extra bits ignored\n");
}
void
bsd_to_svr4_sigaltstack(bss, sss)
const struct sigaltstack *bss;
struct svr4_sigaltstack *sss;
{
sss->ss_sp = bss->ss_sp;
sss->ss_size = bss->ss_size;
sss->ss_flags = 0;
if ((bss->ss_flags & SS_DISABLE) != 0)
sss->ss_flags |= SVR4_SS_DISABLE;
if ((bss->ss_flags & SS_ONSTACK) != 0)
sss->ss_flags |= SVR4_SS_ONSTACK;
}
int
svr4_sys_sigaction(td, uap)
struct thread *td;
struct svr4_sys_sigaction_args *uap;
{
struct svr4_sigaction isa;
struct sigaction nbsa, obsa;
struct sigaction *nbsap;
int error;
if (uap->signum < 0 || uap->signum >= SVR4_NSIG)
return (EINVAL);
DPRINTF(("@@@ svr4_sys_sigaction(%d, %d, %d)\n", td->td_proc->p_pid,
uap->signum,
SVR4_SVR42BSD_SIG(uap->signum)));
if (uap->nsa != NULL) {
if ((error = copyin(uap->nsa, &isa, sizeof(isa))) != 0)
return (error);
svr4_to_bsd_sigaction(&isa, &nbsa);
nbsap = &nbsa;
} else
nbsap = NULL;
#if defined(DEBUG_SVR4)
{
int i;
for (i = 0; i < 4; i++)
DPRINTF(("\tssa_mask[%d] = %lx\n", i,
isa.ssa_mask.bits[i]));
DPRINTF(("\tssa_handler = %p\n", isa.ssa_handler));
}
#endif
error = kern_sigaction(td, SVR4_SVR42BSD_SIG(uap->signum), nbsap, &obsa,
0);
if (error == 0 && uap->osa != NULL) {
bsd_to_svr4_sigaction(&obsa, &isa);
error = copyout(&isa, uap->osa, sizeof(isa));
}
return (error);
}
int
svr4_sys_sigaltstack(td, uap)
struct thread *td;
struct svr4_sys_sigaltstack_args *uap;
{
struct svr4_sigaltstack sss;
struct sigaltstack nbss, obss, *nbssp;
int error;
if (uap->nss != NULL) {
if ((error = copyin(uap->nss, &sss, sizeof(sss))) != 0)
return (error);
svr4_to_bsd_sigaltstack(&sss, &nbss);
nbssp = &nbss;
} else
nbssp = NULL;
error = kern_sigaltstack(td, nbssp, &obss);
if (error == 0 && uap->oss != NULL) {
bsd_to_svr4_sigaltstack(&obss, &sss);
error = copyout(&sss, uap->oss, sizeof(sss));
}
return (error);
}
/*
* Stolen from the ibcs2 one
*/
int
svr4_sys_signal(td, uap)
struct thread *td;
struct svr4_sys_signal_args *uap;
{
struct proc *p;
int signum;
int error;
p = td->td_proc;
DPRINTF(("@@@ svr4_sys_signal(%d)\n", p->p_pid));
signum = SVR4_SIGNO(uap->signum);
if (signum < 0 || signum >= SVR4_NSIG) {
if (SVR4_SIGCALL(uap->signum) == SVR4_SIGNAL_MASK ||
SVR4_SIGCALL(uap->signum) == SVR4_SIGDEFER_MASK)
td->td_retval[0] = (int)SVR4_SIG_ERR;
return (EINVAL);
}
signum = SVR4_SVR42BSD_SIG(signum);
switch (SVR4_SIGCALL(uap->signum)) {
case SVR4_SIGDEFER_MASK:
if (uap->handler == SVR4_SIG_HOLD)
goto sighold;
/* FALLTHROUGH */
case SVR4_SIGNAL_MASK:
{
struct sigaction nbsa, obsa;
nbsa.sa_handler = (sig_t) uap->handler;
SIGEMPTYSET(nbsa.sa_mask);
nbsa.sa_flags = 0;
if (signum != SIGALRM)
nbsa.sa_flags = SA_RESTART;
error = kern_sigaction(td, signum, &nbsa, &obsa, 0);
if (error != 0) {
DPRINTF(("signal: sigaction failed: %d\n",
error));
td->td_retval[0] = (int)SVR4_SIG_ERR;
return (error);
}
td->td_retval[0] = (int)obsa.sa_handler;
return (0);
}
case SVR4_SIGHOLD_MASK:
sighold:
{
sigset_t set;
SIGEMPTYSET(set);
SIGADDSET(set, signum);
return (kern_sigprocmask(td, SIG_BLOCK, &set, NULL, 0));
}
case SVR4_SIGRELSE_MASK:
{
sigset_t set;
SIGEMPTYSET(set);
SIGADDSET(set, signum);
return (kern_sigprocmask(td, SIG_UNBLOCK, &set, NULL,
0));
}
case SVR4_SIGIGNORE_MASK:
{
struct sigaction sa;
sa.sa_handler = SIG_IGN;
SIGEMPTYSET(sa.sa_mask);
sa.sa_flags = 0;
error = kern_sigaction(td, signum, &sa, NULL, 0);
if (error != 0)
DPRINTF(("sigignore: sigaction failed\n"));
return (error);
}
case SVR4_SIGPAUSE_MASK:
{
sigset_t mask;
PROC_LOCK(p);
mask = td->td_sigmask;
PROC_UNLOCK(p);
SIGDELSET(mask, signum);
return kern_sigsuspend(td, mask);
}
default:
return (ENOSYS);
}
}
int
svr4_sys_sigprocmask(td, uap)
struct thread *td;
struct svr4_sys_sigprocmask_args *uap;
{
svr4_sigset_t sss;
sigset_t oss, nss;
sigset_t *nssp;
int error;
if (uap->set != NULL) {
if ((error = copyin(uap->set, &sss, sizeof(sss))) != 0)
return error;
svr4_to_bsd_sigset(&sss, &nss);
nssp = &nss;
} else
nssp = NULL;
/* SVR/4 sigprocmask flag values are the same as the FreeBSD values. */
error = kern_sigprocmask(td, uap->how, nssp, &oss, 0);
if (error == 0 && uap->oset != NULL) {
bsd_to_svr4_sigset(&oss, &sss);
error = copyout(&sss, uap->oset, sizeof(sss));
}
return (error);
}
int
svr4_sys_sigpending(td, uap)
struct thread *td;
struct svr4_sys_sigpending_args *uap;
{
struct proc *p;
sigset_t bss;
svr4_sigset_t sss;
p = td->td_proc;
DPRINTF(("@@@ svr4_sys_sigpending(%d)\n", p->p_pid));
switch (uap->what) {
case 1: /* sigpending */
if (uap->mask == NULL)
return 0;
PROC_LOCK(p);
bss = p->p_siglist;
SIGSETOR(bss, td->td_siglist);
SIGSETAND(bss, td->td_sigmask);
PROC_UNLOCK(p);
bsd_to_svr4_sigset(&bss, &sss);
break;
case 2: /* sigfillset */
svr4_sigfillset(&sss);
#if defined(DEBUG_SVR4)
{
int i;
for (i = 0; i < 4; i++)
DPRINTF(("new sigset[%d] = %lx\n", i, (long)sss.bits[i]));
}
#endif
break;
default:
return EINVAL;
}
return copyout(&sss, uap->mask, sizeof(sss));
}
int
svr4_sys_sigsuspend(td, uap)
struct thread *td;
struct svr4_sys_sigsuspend_args *uap;
{
svr4_sigset_t sss;
sigset_t bss;
int error;
if ((error = copyin(uap->ss, &sss, sizeof(sss))) != 0)
return error;
svr4_to_bsd_sigset(&sss, &bss);
return kern_sigsuspend(td, bss);
}
int
svr4_sys_kill(td, uap)
struct thread *td;
struct svr4_sys_kill_args *uap;
{
struct kill_args ka;
if (uap->signum < 0 || uap->signum >= SVR4_NSIG)
return (EINVAL);
ka.pid = uap->pid;
ka.signum = SVR4_SVR42BSD_SIG(uap->signum);
return sys_kill(td, &ka);
}
int
svr4_sys_context(td, uap)
struct thread *td;
struct svr4_sys_context_args *uap;
{
struct svr4_ucontext uc;
int error, onstack;
switch (uap->func) {
case 0:
DPRINTF(("getcontext(%p)\n", uap->uc));
PROC_LOCK(td->td_proc);
onstack = sigonstack(cpu_getstack(td));
PROC_UNLOCK(td->td_proc);
svr4_getcontext(td, &uc, &td->td_sigmask, onstack);
return copyout(&uc, uap->uc, sizeof(uc));
case 1:
DPRINTF(("setcontext(%p)\n", uap->uc));
if ((error = copyin(uap->uc, &uc, sizeof(uc))) != 0)
return error;
DPRINTF(("uc_flags = %lx\n", uc.uc_flags));
#if defined(DEBUG_SVR4)
{
int i;
for (i = 0; i < 4; i++)
DPRINTF(("uc_sigmask[%d] = %lx\n", i,
uc.uc_sigmask.bits[i]));
}
#endif
return svr4_setcontext(td, &uc);
default:
DPRINTF(("context(%d, %p)\n", uap->func,
uap->uc));
return ENOSYS;
}
return 0;
}
int
svr4_sys_pause(td, uap)
struct thread *td;
struct svr4_sys_pause_args *uap;
{
sigset_t mask;
PROC_LOCK(td->td_proc);
mask = td->td_sigmask;
PROC_UNLOCK(td->td_proc);
return kern_sigsuspend(td, mask);
}