NetBSD/sys/compat/ibcs2/ibcs2_signal.c

410 lines
9.7 KiB
C

/*
* 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/file.h>
#include <sys/stat.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/signal.h>
#include <sys/syscallargs.h>
#include <compat/ibcs2/ibcs2_types.h>
#include <compat/ibcs2/ibcs2_fcntl.h>
#include <compat/ibcs2/ibcs2_signal.h>
#include <compat/ibcs2/ibcs2_syscallargs.h>
#include <compat/ibcs2/ibcs2_util.h>
#define NOSIG (-1)
static int ibcs2bsd_sigtbl[IBCS2_NSIG] = {
NOSIG, /* 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 */
NOSIG, /* 19 - SIGPWR */
SIGWINCH, /* 20 */
NOSIG, /* 21 */
NOSIG, /* 22 - SIGPOLL */
SIGSTOP, /* 23 */
SIGTSTP, /* 24 */
SIGCONT, /* 25 */
SIGTTIN, /* 26 */
SIGTTOU, /* 27 */
SIGVTALRM, /* 28 */
SIGPROF, /* 29 */
NOSIG, /* 30 */
NOSIG, /* 31 */
};
static int bsd2ibcs_sigtbl[NSIG] = {
NOSIG, /* 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 */
NOSIG, /* 16 */
IBCS2_SIGSTOP, /* 17 */
IBCS2_SIGTSTP, /* 18 */
IBCS2_SIGCONT, /* 19 */
IBCS2_SIGCLD, /* 20 */
IBCS2_SIGTTIN, /* 21 */
IBCS2_SIGTTOU, /* 22 */
NOSIG, /* 23 */
NOSIG, /* 24 */
NOSIG, /* 25 */
IBCS2_SIGVTALRM, /* 26 */
IBCS2_SIGPROF, /* 27 */
IBCS2_SIGWINCH, /* 28 */
NOSIG, /* 29 */
IBCS2_SIGUSR1, /* 30 */
IBCS2_SIGUSR2, /* 31 */
};
static int
ibcs2bsd_sig(sig)
int sig;
{
if (sig < 1 || sig >= IBCS2_NSIG)
return NOSIG;
else
return ibcs2bsd_sigtbl[sig];
}
int
bsd2ibcs_sig(sig)
int sig;
{
if (sig < 1 || sig >= NSIG)
return NOSIG;
else
return bsd2ibcs_sigtbl[sig];
}
static sigset_t
cvt_sigmask(mask, sigtbl)
sigset_t mask;
int sigtbl[];
{
int i, newmask;
for (i = 0, newmask = 0; i < NSIG; i++)
if ((sigtbl[i] != NOSIG) && (mask & (1 << i)))
newmask |= (1 << (sigtbl[i] - 1));
return newmask;
}
static void
cvt_sa2isa(sap, isap)
struct sigaction *sap;
struct ibcs2_sigaction *isap;
{
isap->sa_handler = sap->sa_handler;
isap->sa_mask = cvt_sigmask(sap->sa_mask, bsd2ibcs_sigtbl);
isap->sa_flags = (sap->sa_flags & SA_NOCLDSTOP)
? IBCS2_SA_NOCLDSTOP : 0;
}
static void
cvt_isa2sa(isap, sap)
struct ibcs2_sigaction *isap;
struct sigaction *sap;
{
sap->sa_handler = isap->sa_handler;
sap->sa_mask = cvt_sigmask(isap->sa_mask, ibcs2bsd_sigtbl);
sap->sa_flags = (isap->sa_flags & IBCS2_SA_NOCLDSTOP)
? SA_NOCLDSTOP : 0;
}
int
ibcs2_sigsys(p, uap, retval)
struct proc *p;
struct ibcs2_sigsys_args *uap;
int *retval;
{
int error;
int nsig = ibcs2bsd_sig(IBCS2_SIGNO(SCARG(uap, sig)));
if (nsig == NOSIG) {
if (IBCS2_SIGCALL(SCARG(uap, sig)) == IBCS2_SIGNAL_MASK
|| IBCS2_SIGCALL(SCARG(uap, sig)) == IBCS2_SIGSET_MASK)
*retval = (int)IBCS2_SIG_ERR;
return EINVAL;
}
switch (IBCS2_SIGCALL(SCARG(uap, sig))) {
/*
* sigset is identical to signal() except that SIG_HOLD is allowed as
* an action and we don't set the bit in the ibcs_sigflags field.
*/
case IBCS2_SIGSET_MASK:
if (SCARG(uap, fp) == IBCS2_SIG_HOLD) {
struct sigprocmask_args sa;
SCARG(&sa, how) = SIG_BLOCK;
SCARG(&sa, mask) = sigmask(nsig);
return sigprocmask(p, &sa, retval);
}
/* else fall through */
case IBCS2_SIGNAL_MASK:
{
struct sigaction *sap, *osap;
struct sigaction_args sa_args;
caddr_t sg = stackgap_init();
sap = stackgap_alloc(&sg, sizeof(*sap));
osap = stackgap_alloc(&sg, sizeof(*sap));
sap->sa_handler = SCARG(uap, fp);
sap->sa_mask = (sigset_t)0;
sap->sa_flags = 0;
#if 0
if (SCARG(&sa_args, sig) != SIGALRM)
sap->sa_flags = SA_RESTART;
#endif
SCARG(&sa_args, signum) = nsig;
SCARG(&sa_args, nsa) = sap;
SCARG(&sa_args, osa) = osap;
error = sigaction(p, &sa_args, retval);
if (error) {
DPRINTF(("signal: sigaction failed: %d\n",
error));
*retval = (int)IBCS2_SIG_ERR;
return error;
}
*retval = (int)SCARG(&sa_args, osa)->sa_handler;
if (IBCS2_SIGCALL(SCARG(uap, sig)) == IBCS2_SIGNAL_MASK)
p->p_md.ibcs_sigflags |= sigmask(nsig);
return 0;
}
case IBCS2_SIGHOLD_MASK:
{
struct sigprocmask_args sa;
sa.how = SIG_BLOCK;
sa.mask = sigmask(nsig);
return sigprocmask(p, &sa, retval);
}
case IBCS2_SIGRELSE_MASK:
{
struct sigprocmask_args sa;
sa.how = SIG_UNBLOCK;
sa.mask = sigmask(nsig);
return sigprocmask(p, &sa, retval);
}
case IBCS2_SIGIGNORE_MASK:
{
struct sigaction *sap;
struct sigaction_args sa_args;
caddr_t sg = stackgap_init();
sap = stackgap_alloc(&sg, sizeof(*sap));
sap->sa_handler = SIG_IGN;
sap->sa_mask = (sigset_t)0;
sap->sa_flags = 0;
SCARG(&sa_args, signum) = nsig;
SCARG(&sa_args, nsa) = sap;
SCARG(&sa_args, osa) = NULL;
error = sigaction(p, &sa_args, retval);
if (error) {
DPRINTF(("sigignore: sigaction failed\n"));
return error;
}
return 0;
}
case IBCS2_SIGPAUSE_MASK:
{
struct sigsuspend_args sa;
SCARG(&sa, mask) = p->p_sigmask &~ sigmask(nsig);
return sigsuspend(p, &sa, retval);
}
default:
return ENOSYS;
}
}
int
ibcs2_sigaction(p, uap, retval)
struct proc *p;
struct ibcs2_sigaction_args *uap;
int *retval;
{
int error;
struct sigaction_args sa;
struct ibcs2_sigaction *isa, *oisa;
caddr_t sg = stackgap_init();
isa = stackgap_alloc(&sg, sizeof(*isa));
oisa = stackgap_alloc(&sg, sizeof(*oisa));
SCARG(&sa, signum) = ibcs2bsd_sig(SCARG(uap, sig));
SCARG(&sa, nsa) = stackgap_alloc(&sg, sizeof(*SCARG(&sa, nsa)));
SCARG(&sa, osa) = stackgap_alloc(&sg, sizeof(*SCARG(&sa, osa)));
if (error = copyin((caddr_t)SCARG(uap, act), (caddr_t)isa,
sizeof(*isa)))
return error;
cvt_isa2sa(isa, SCARG(&sa, nsa));
if (error = sigaction(p, &sa, retval))
return error;
cvt_sa2isa(SCARG(&sa, osa), oisa);
return copyout((caddr_t)oisa, (caddr_t)SCARG(uap, oact), sizeof(*oisa));
}
int
ibcs2_sigprocmask(p, uap, retval)
struct proc *p;
struct ibcs2_sigprocmask_args *uap;
int *retval;
{
int error;
sigset_t iset;
struct sigprocmask_args sa;
if (SCARG(uap, set)) {
switch (SCARG(uap, how)) {
case IBCS2_SIG_BLOCK:
SCARG(&sa, how) = SIG_BLOCK;
break;
case IBCS2_SIG_UNBLOCK:
SCARG(&sa, how) = SIG_UNBLOCK;
break;
case IBCS2_SIG_SETMASK:
SCARG(&sa, how) = SIG_SETMASK;
break;
default:
return EINVAL;
}
if (error = copyin((caddr_t)SCARG(uap, set), (caddr_t)&iset,
sizeof(iset)))
return error;
SCARG(&sa, mask) = cvt_sigmask(iset, ibcs2bsd_sigtbl);
} else {
SCARG(&sa, how) = SIG_BLOCK; /* TODO: CHECK THIS */
SCARG(&sa, mask) = 0;
}
if (error = sigprocmask(p, &sa, retval))
return error;
if (SCARG(uap, oset) == NULL) {
*retval = 0;
return 0;
}
iset = cvt_sigmask(*retval, bsd2ibcs_sigtbl);
*retval = 0;
return copyout((caddr_t)&iset, (caddr_t)SCARG(uap, oset),
sizeof(iset));
}
int
ibcs2_sigpending(p, uap, retval)
struct proc *p;
struct ibcs2_sigpending_args *uap;
int *retval;
{
int mask = cvt_sigmask(p->p_siglist & p->p_sigmask, bsd2ibcs_sigtbl);
return (copyout((caddr_t)&mask, (caddr_t)SCARG(uap, mask),
sizeof(int)));
}
int
ibcs2_sigsuspend(p, uap, retval)
struct proc *p;
struct ibcs2_sigsuspend_args *uap;
int *retval;
{
int error;
struct sigsuspend_args sa;
if (error = copyin((caddr_t)SCARG(uap, mask), (caddr_t)SCARG(&sa, mask),
sizeof(SCARG(&sa, mask))))
return error;
return sigsuspend(p, &sa, retval);
}
int
ibcs2_pause(p, uap, retval)
struct proc *p;
void *uap;
int *retval;
{
int error;
struct sigsuspend_args sa;
SCARG(&sa, mask) = p->p_sigmask;
error = sigsuspend(p, &sa, retval);
return error;
}
int
ibcs2_kill(p, uap, retval)
struct proc *p;
struct ibcs2_kill_args *uap;
int *retval;
{
SCARG(uap, signo) = ibcs2bsd_sig(SCARG(uap, signo));
if (SCARG(uap, signo) == NOSIG)
return EINVAL;
return kill(p, uap, retval);
}