/* $OpenBSD: ibcs2_signal.c,v 1.7 2002/03/14 01:26:50 millert Exp $ */
/* $NetBSD: ibcs2_signal.c,v 1.8 1996/05/03 17:05:27 christos Exp $ */
/*
* Copyright (c) 1995 Scott Bartram
* 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/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/ibcs2/ibcs2_types.h>
#include <compat/ibcs2/ibcs2_signal.h>
#include <compat/ibcs2/ibcs2_syscallargs.h>
#include <compat/ibcs2/ibcs2_util.h>
#define sigemptyset(s) bzero((s), sizeof(*(s)))
#define sigismember(s, n) (*(s) & sigmask(n))
#define sigaddset(s, n) (*(s) |= sigmask(n))
#define ibcs2_sigmask(n) (1 << ((n) - 1))
#define ibcs2_sigemptyset(s) bzero((s), sizeof(*(s)))
#define ibcs2_sigismember(s, n) (*(s) & ibcs2_sigmask(n))
#define ibcs2_sigaddset(s, n) (*(s) |= ibcs2_sigmask(n))
int bsd_to_ibcs2_sig[] = {
0, /* 0 */
IBCS2_SIGHUP, /* 1 */
IBCS2_SIGINT, /* 2 */
IBCS2_SIGQUIT, /* 3 */
IBCS2_SIGILL, /* 4 */
IBCS2_SIGTRAP, /* 5 */
IBCS2_SIGABRT, /* 6 */
IBCS2_SIGEMT, /* 7 */
IBCS2_SIGFPE, /* 8 */
IBCS2_SIGKILL, /* 9 */
IBCS2_SIGBUS, /* 10 */
IBCS2_SIGSEGV, /* 11 */
IBCS2_SIGSYS, /* 12 */
IBCS2_SIGPIPE, /* 13 */
IBCS2_SIGALRM, /* 14 */
IBCS2_SIGTERM, /* 15 */
0, /* 16 - SIGURG */
IBCS2_SIGSTOP, /* 17 */
IBCS2_SIGTSTP, /* 18 */
IBCS2_SIGCONT, /* 19 */
IBCS2_SIGCLD, /* 20 */
IBCS2_SIGTTIN, /* 21 */
IBCS2_SIGTTOU, /* 22 */
IBCS2_SIGPOLL, /* 23 */
0, /* 24 - SIGXCPU */
0, /* 25 - SIGXFSZ */
IBCS2_SIGVTALRM, /* 26 */
IBCS2_SIGPROF, /* 27 */
IBCS2_SIGWINCH, /* 28 */
0, /* 29 */
IBCS2_SIGUSR1, /* 30 */
IBCS2_SIGUSR2, /* 31 */
};
int ibcs2_to_bsd_sig[] = {
0, /* 0 */
SIGHUP, /* 1 */
SIGINT, /* 2 */
SIGQUIT, /* 3 */
SIGILL, /* 4 */
SIGTRAP, /* 5 */
SIGABRT, /* 6 */
SIGEMT, /* 7 */
SIGFPE, /* 8 */
SIGKILL, /* 9 */
SIGBUS, /* 10 */
SIGSEGV, /* 11 */
SIGSYS, /* 12 */
SIGPIPE, /* 13 */
SIGALRM, /* 14 */
SIGTERM, /* 15 */
SIGUSR1, /* 16 */
SIGUSR2, /* 17 */
SIGCHLD, /* 18 */
0, /* 19 - SIGPWR */
SIGWINCH, /* 20 */
0, /* 21 */
SIGIO, /* 22 */
SIGSTOP, /* 23 */
SIGTSTP, /* 24 */
SIGCONT, /* 25 */
SIGTTIN, /* 26 */
SIGTTOU, /* 27 */
SIGVTALRM, /* 28 */
SIGPROF, /* 29 */
0, /* 30 */
0, /* 31 */
};
void ibcs2_to_bsd_sigset(const ibcs2_sigset_t *, sigset_t *);
void bsd_to_ibcs2_sigset(const sigset_t *, ibcs2_sigset_t *);
void ibcs2_to_bsd_sigaction(struct ibcs2_sigaction *,
struct sigaction *);
void bsd_to_ibcs2_sigaction(struct sigaction *, struct ibcs2_sigaction *);
void
ibcs2_to_bsd_sigset(iss, bss)
const ibcs2_sigset_t *iss;
sigset_t *bss;
{
int i, newsig;
sigemptyset(bss);
for (i = 1; i < IBCS2_NSIG; i++) {
if (ibcs2_sigismember(iss, i)) {
newsig = ibcs2_to_bsd_sig[i];
if (newsig)
sigaddset(bss, newsig);
}
}
}
void
bsd_to_ibcs2_sigset(bss, iss)
const sigset_t *bss;
ibcs2_sigset_t *iss;
{
int i, newsig;
ibcs2_sigemptyset(iss);
for (i = 1; i < NSIG; i++) {
if (sigismember(bss, i)) {
newsig = bsd_to_ibcs2_sig[i];
if (newsig)
ibcs2_sigaddset(iss, newsig);
}
}
}
void
ibcs2_to_bsd_sigaction(isa, bsa)
struct ibcs2_sigaction *isa;
struct sigaction *bsa;
{
bsa->sa_handler = isa->sa__handler;
ibcs2_to_bsd_sigset(&isa->sa_mask, &bsa->sa_mask);
bsa->sa_flags = 0;
if ((isa->sa_flags & IBCS2_SA_NOCLDSTOP) != 0)
bsa->sa_flags |= SA_NOCLDSTOP;
}
void
bsd_to_ibcs2_sigaction(bsa, isa)
struct sigaction *bsa;
struct ibcs2_sigaction *isa;
{
isa->sa__handler = bsa->sa_handler;
bsd_to_ibcs2_sigset(&bsa->sa_mask, &isa->sa_mask);
isa->sa_flags = 0;
if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
isa->sa_flags |= IBCS2_SA_NOCLDSTOP;
}
int
ibcs2_sys_sigaction(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct ibcs2_sys_sigaction_args /* {
syscallarg(int) signum;
syscallarg(struct ibcs2_sigaction *) nsa;
syscallarg(struct ibcs2_sigaction *) osa;
} */ *uap = v;
struct ibcs2_sigaction *nisa, *oisa, tmpisa;
struct sigaction *nbsa, *obsa, tmpbsa;
struct sys_sigaction_args sa;
caddr_t sg;
int error;
if (SCARG(uap, signum) < 0 || SCARG(uap, signum) >= IBCS2_NSIG)
return (EINVAL);
sg = stackgap_init(p->p_emul);
nisa = SCARG(uap, nsa);
oisa = SCARG(uap, osa);
if (oisa != NULL)
obsa = stackgap_alloc(&sg, sizeof(struct sigaction));
else
obsa = NULL;
if (nisa != NULL) {
nbsa = stackgap_alloc(&sg, sizeof(struct sigaction));
if ((error = copyin(nisa, &tmpisa, sizeof(tmpisa))) != 0)
return error;
ibcs2_to_bsd_sigaction(&tmpisa, &tmpbsa);
if ((error = copyout(&tmpbsa, nbsa, sizeof(tmpbsa))) != 0)
return error;
} else
nbsa = NULL;
SCARG(&sa, signum) = ibcs2_to_bsd_sig[SCARG(uap, signum)];
SCARG(&sa, nsa) = nbsa;
SCARG(&sa, osa) = obsa;
if ((error = sys_sigaction(p, &sa, retval)) != 0)
return error;
if (oisa != NULL) {
if ((error = copyin(obsa, &tmpbsa, sizeof(tmpbsa))) != 0)
return error;
bsd_to_ibcs2_sigaction(&tmpbsa, &tmpisa);
if ((error = copyout(&tmpisa, oisa, sizeof(tmpisa))) != 0)
return error;
}
return 0;
}
int
ibcs2_sys_sigsys(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct ibcs2_sys_sigsys_args /* {
syscallarg(int) sig;
syscallarg(ibcs2_sig_t) fp;
} */ *uap = v;
int signum, error;
caddr_t sg = stackgap_init(p->p_emul);
signum = IBCS2_SIGNO(SCARG(uap, sig));
if (signum < 0 || signum >= IBCS2_NSIG) {
if (IBCS2_SIGCALL(SCARG(uap, sig)) == IBCS2_SIGNAL_MASK ||
IBCS2_SIGCALL(SCARG(uap, sig)) == IBCS2_SIGSET_MASK)
*retval = (int)IBCS2_SIG_ERR;
return EINVAL;
}
signum = ibcs2_to_bsd_sig[signum];
switch (IBCS2_SIGCALL(SCARG(uap, sig))) {
/*
* sigset is identical to signal() except that SIG_HOLD is allowed as
* an action.
*/
case IBCS2_SIGSET_MASK:
/*
* sigset is identical to signal() except
* that SIG_HOLD is allowed as
* an action.
*/
if (SCARG(uap, fp) == IBCS2_SIG_HOLD) {
struct sys_sigprocmask_args sa;
SCARG(&sa, how) = SIG_BLOCK;
SCARG(&sa, mask) = sigmask(signum);
return sys_sigprocmask(p, &sa, retval);
}
/* FALLTHROUGH */
case IBCS2_SIGNAL_MASK:
{
struct sys_sigaction_args sa_args;
struct sigaction *nbsa, *obsa, sa;
nbsa = stackgap_alloc(&sg, sizeof(struct sigaction));
obsa = stackgap_alloc(&sg, sizeof(struct sigaction));
SCARG(&sa_args, signum) = signum;
SCARG(&sa_args, nsa) = nbsa;
SCARG(&sa_args, osa) = obsa;
sa.sa_handler = SCARG(uap, fp);
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
#if 0
if (signum != SIGALRM)
sa.sa_flags = SA_RESTART;
#endif
if ((error = copyout(&sa, nbsa, sizeof(sa))) != 0)
return error;
if ((error = sys_sigaction(p, &sa_args, retval)) != 0) {
DPRINTF(("signal: sigaction failed: %d\n",
error));
*retval = (int)IBCS2_SIG_ERR;
return error;
}
if ((error = copyin(obsa, &sa, sizeof(sa))) != 0)
return error;
*retval = (int)sa.sa_handler;
return 0;
}
case IBCS2_SIGHOLD_MASK:
{
struct sys_sigprocmask_args sa;
SCARG(&sa, how) = SIG_BLOCK;
SCARG(&sa, mask) = sigmask(signum);
return sys_sigprocmask(p, &sa, retval);
}
case IBCS2_SIGRELSE_MASK:
{
struct sys_sigprocmask_args sa;
SCARG(&sa, how) = SIG_UNBLOCK;
SCARG(&sa, mask) = sigmask(signum);
return sys_sigprocmask(p, &sa, retval);
}
case IBCS2_SIGIGNORE_MASK:
{
struct sys_sigaction_args sa_args;
struct sigaction *bsa, sa;
bsa = stackgap_alloc(&sg, sizeof(struct sigaction));
SCARG(&sa_args, signum) = signum;
SCARG(&sa_args, nsa) = bsa;
SCARG(&sa_args, osa) = NULL;
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if ((error = copyout(&sa, bsa, sizeof(sa))) != 0)
return error;
if ((error = sys_sigaction(p, &sa_args, retval)) != 0) {
DPRINTF(("sigignore: sigaction failed\n"));
return error;
}
return 0;
}
case IBCS2_SIGPAUSE_MASK:
{
struct sys_sigsuspend_args sa;
SCARG(&sa, mask) = p->p_sigmask &~ sigmask(signum);
return sys_sigsuspend(p, &sa, retval);
}
default:
return ENOSYS;
}
}
int
ibcs2_sys_sigprocmask(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct ibcs2_sys_sigprocmask_args /* {
syscallarg(int) how;
syscallarg(ibcs2_sigset_t *) set;
syscallarg(ibcs2_sigset_t *) oset;
} */ *uap = v;
ibcs2_sigset_t iss;
sigset_t bss;
int error = 0;
if (SCARG(uap, oset) != NULL) {
/* Fix the return value first if needed */
bsd_to_ibcs2_sigset(&p->p_sigmask, &iss);
if ((error = copyout(&iss, SCARG(uap, oset), sizeof(iss))) != 0)
return error;
}
if (SCARG(uap, set) == NULL)
/* Just examine */
return 0;
if ((error = copyin(SCARG(uap, set), &iss, sizeof(iss))) != 0)
return error;
ibcs2_to_bsd_sigset(&iss, &bss);
(void) splhigh();
switch (SCARG(uap, how)) {
case IBCS2_SIG_BLOCK:
p->p_sigmask |= bss & ~sigcantmask;
break;
case IBCS2_SIG_UNBLOCK:
p->p_sigmask &= ~bss;
break;
case IBCS2_SIG_SETMASK:
p->p_sigmask = bss & ~sigcantmask;
break;
default:
error = EINVAL;
break;
}
(void) spl0();
return error;
}
int
ibcs2_sys_sigpending(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct ibcs2_sys_sigpending_args /* {
syscallarg(ibcs2_sigset_t *) mask;
} */ *uap = v;
sigset_t bss;
ibcs2_sigset_t iss;
bss = p->p_siglist & p->p_sigmask;
bsd_to_ibcs2_sigset(&bss, &iss);
return copyout(&iss, SCARG(uap, mask), sizeof(iss));
}
int
ibcs2_sys_sigsuspend(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct ibcs2_sys_sigsuspend_args /* {
syscallarg(ibcs2_sigset_t *) mask;
} */ *uap = v;
ibcs2_sigset_t sss;
sigset_t bss;
struct sys_sigsuspend_args sa;
int error;
if ((error = copyin(SCARG(uap, mask), &sss, sizeof(sss))) != 0)
return error;
ibcs2_to_bsd_sigset(&sss, &bss);
SCARG(&sa, mask) = bss;
return sys_sigsuspend(p, &sa, retval);
}
int
ibcs2_sys_pause(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct sys_sigsuspend_args bsa;
SCARG(&bsa, mask) = p->p_sigmask;
return sys_sigsuspend(p, &bsa, retval);
}
int
ibcs2_sys_kill(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct ibcs2_sys_kill_args /* {
syscallarg(int) pid;
syscallarg(int) signo;
} */ *uap = v;
struct sys_kill_args ka;
if (SCARG(uap, signo) < 0 || SCARG(uap, signo) >= IBCS2_NSIG)
return (EINVAL);
SCARG(&ka, pid) = SCARG(uap, pid);
SCARG(&ka, signum) = ibcs2_to_bsd_sig[SCARG(uap, signo)];
return sys_kill(p, &ka, retval);
}
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