NetBSD/sys/compat/svr4/svr4_signal.c

639 lines
14 KiB
C

/* $NetBSD: svr4_signal.c,v 1.34 1999/01/21 23:20:43 christos Exp $ */
/*-
* Copyright (c) 1994, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas and by Charles M. Hannum.
*
* 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.
*/
#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/wait.h>
#include <sys/syscallargs.h>
#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_signal.h>
#include <compat/svr4/svr4_syscallargs.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))
static __inline void svr4_sigfillset __P((svr4_sigset_t *));
void svr4_to_native_sigaction __P((const struct svr4_sigaction *,
struct sigaction *));
void native_to_svr4_sigaction __P((const struct sigaction *,
struct svr4_sigaction *));
int native_to_svr4_sig[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,
SVR4_SIGPWR,
};
int svr4_to_native_sig[SVR4_NSIG] = {
0,
SIGHUP,
SIGINT,
SIGQUIT,
SIGILL,
SIGTRAP,
SIGABRT,
SIGEMT,
SIGFPE,
SIGKILL,
SIGBUS,
SIGSEGV,
SIGSYS,
SIGPIPE,
SIGALRM,
SIGTERM,
SIGUSR1,
SIGUSR2,
SIGCHLD,
SIGPWR,
SIGWINCH,
SIGURG,
SIGIO,
SIGSTOP,
SIGTSTP,
SIGCONT,
SIGTTIN,
SIGTTOU,
SIGVTALRM,
SIGPROF,
SIGXCPU,
SIGXFSZ,
};
static __inline void
svr4_sigfillset(s)
svr4_sigset_t *s;
{
int i;
svr4_sigemptyset(s);
for (i = 1; i < SVR4_NSIG; i++)
if (svr4_to_native_sig[i] != 0)
svr4_sigaddset(s, i);
}
void
svr4_to_native_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_native_sig[i];
if (newsig)
sigaddset(bss, newsig);
}
}
}
void
native_to_svr4_sigset(bss, sss)
const sigset_t *bss;
svr4_sigset_t *sss;
{
int i, newsig;
svr4_sigemptyset(sss);
for (i = 1; i < NSIG; i++) {
if (sigismember(bss, i)) {
newsig = native_to_svr4_sig[i];
if (newsig)
svr4_sigaddset(sss, newsig);
}
}
}
/*
* XXX: Only a subset of the flags is currently implemented.
*/
void
svr4_to_native_sigaction(ssa, bsa)
const struct svr4_sigaction *ssa;
struct sigaction *bsa;
{
bsa->sa_handler = (sig_t) ssa->sa_handler;
svr4_to_native_sigset(&ssa->sa_mask, &bsa->sa_mask);
bsa->sa_flags = 0;
if ((ssa->sa_flags & SVR4_SA_ONSTACK) != 0)
bsa->sa_flags |= SA_ONSTACK;
if ((ssa->sa_flags & SVR4_SA_RESETHAND) != 0)
bsa->sa_flags |= SA_RESETHAND;
if ((ssa->sa_flags & SVR4_SA_RESTART) != 0)
bsa->sa_flags |= SA_RESTART;
if ((ssa->sa_flags & SVR4_SA_SIGINFO) != 0)
DPRINTF(("svr4_to_native_sigaction: SA_SIGINFO ignored\n"));
if ((ssa->sa_flags & SVR4_SA_NODEFER) != 0)
bsa->sa_flags |= SA_NODEFER;
if ((ssa->sa_flags & SVR4_SA_NOCLDWAIT) != 0)
bsa->sa_flags |= SA_NOCLDWAIT;
if ((ssa->sa_flags & SVR4_SA_NOCLDSTOP) != 0)
bsa->sa_flags |= SA_NOCLDSTOP;
if ((ssa->sa_flags & ~SVR4_SA_ALLBITS) != 0)
DPRINTF(("svr4_to_native_sigaction: extra bits ignored\n"));
}
void
native_to_svr4_sigaction(bsa, ssa)
const struct sigaction *bsa;
struct svr4_sigaction *ssa;
{
ssa->sa_handler = (svr4_sig_t) bsa->sa_handler;
native_to_svr4_sigset(&bsa->sa_mask, &ssa->sa_mask);
ssa->sa_flags = 0;
if ((bsa->sa_flags & SA_ONSTACK) != 0)
ssa->sa_flags |= SVR4_SA_ONSTACK;
if ((bsa->sa_flags & SA_RESETHAND) != 0)
ssa->sa_flags |= SVR4_SA_RESETHAND;
if ((bsa->sa_flags & SA_RESTART) != 0)
ssa->sa_flags |= SVR4_SA_RESTART;
if ((bsa->sa_flags & SA_NODEFER) != 0)
ssa->sa_flags |= SVR4_SA_NODEFER;
if ((bsa->sa_flags & SA_NOCLDSTOP) != 0)
ssa->sa_flags |= SVR4_SA_NOCLDSTOP;
}
void
svr4_to_native_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*/ printf("svr4_to_native_sigaltstack: extra bits ignored\n");
}
void
native_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(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_sigaction_args /* {
syscallarg(int) signum;
syscallarg(const struct svr4_sigaction *) nsa;
syscallarg(struct svr4_sigaction *) osa;
} */ *uap = v;
struct svr4_sigaction nssa, ossa;
struct sigaction nbsa, obsa;
int error;
if (SCARG(uap, nsa)) {
error = copyin(SCARG(uap, nsa), &nssa, sizeof(nssa));
if (error)
return (error);
svr4_to_native_sigaction(&nssa, &nbsa);
}
error = sigaction1(p, svr4_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_svr4_sigaction(&obsa, &ossa);
error = copyout(&ossa, SCARG(uap, osa), sizeof(ossa));
if (error)
return (error);
}
return (0);
}
int
svr4_sys_sigaltstack(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_sigaltstack_args /* {
syscallarg(const struct svr4_sigaltstack *) nss;
syscallarg(struct svr4_sigaltstack *) oss;
} */ *uap = v;
struct svr4_sigaltstack nsss, osss;
struct sigaltstack nbss, obss;
int error;
if (SCARG(uap, nss)) {
error = copyin(SCARG(uap, nss), &nsss, sizeof(nsss));
if (error)
return (error);
svr4_to_native_sigaltstack(&nsss, &nbss);
}
error = sigaltstack1(p,
SCARG(uap, nss) ? &nbss : 0, SCARG(uap, oss) ? &obss : 0);
if (error)
return (error);
if (SCARG(uap, oss)) {
native_to_svr4_sigaltstack(&obss, &osss);
error = copyout(&osss, SCARG(uap, oss), sizeof(osss));
if (error)
return (error);
}
return (0);
}
/*
* Stolen from the ibcs2 one
*/
int
svr4_sys_signal(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_signal_args /* {
syscallarg(int) signum;
syscallarg(svr4_sig_t) handler;
} */ *uap = v;
int signum = svr4_to_native_sig[SVR4_SIGNO(SCARG(uap, signum))];
struct sigaction nbsa, obsa;
sigset_t ss;
int error;
if (signum <= 0 || signum >= SVR4_NSIG)
return (EINVAL);
switch (SVR4_SIGCALL(SCARG(uap, signum))) {
case SVR4_SIGDEFER_MASK:
if (SCARG(uap, handler) == SVR4_SIG_HOLD)
goto sighold;
/* FALLTHROUGH */
case SVR4_SIGNAL_MASK:
nbsa.sa_handler = (sig_t)SCARG(uap, handler);
sigemptyset(&nbsa.sa_mask);
nbsa.sa_flags = 0;
error = sigaction1(p, signum, &nbsa, &obsa);
if (error)
return (error);
*retval = (int)obsa.sa_handler;
return (0);
case SVR4_SIGHOLD_MASK:
sighold:
sigemptyset(&ss);
sigaddset(&ss, signum);
return (sigprocmask1(p, SIG_BLOCK, &ss, 0));
case SVR4_SIGRELSE_MASK:
sigemptyset(&ss);
sigaddset(&ss, signum);
return (sigprocmask1(p, SIG_UNBLOCK, &ss, 0));
case SVR4_SIGIGNORE_MASK:
nbsa.sa_handler = SIG_IGN;
sigemptyset(&nbsa.sa_mask);
nbsa.sa_flags = 0;
return (sigaction1(p, signum, &nbsa, 0));
case SVR4_SIGPAUSE_MASK:
ss = p->p_sigmask;
sigdelset(&ss, signum);
return (sigsuspend1(p, &ss));
default:
return (ENOSYS);
}
}
int
svr4_sys_sigprocmask(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_sigprocmask_args /* {
syscallarg(int) how;
syscallarg(const svr4_sigset_t *) set;
syscallarg(svr4_sigset_t *) oset;
} */ *uap = v;
svr4_sigset_t nsss, osss;
sigset_t nbss, obss;
int how;
int error;
/*
* Initialize how to 0 to avoid a compiler warning. Note that
* this is safe because of the check in the default: case.
*/
how = 0;
switch (SCARG(uap, how)) {
case SVR4_SIG_BLOCK:
how = SIG_BLOCK;
break;
case SVR4_SIG_UNBLOCK:
how = SIG_UNBLOCK;
break;
case SVR4_SIG_SETMASK:
how = SIG_SETMASK;
break;
default:
if (SCARG(uap, set))
return EINVAL;
break;
}
if (SCARG(uap, set)) {
error = copyin(SCARG(uap, set), &nsss, sizeof(nsss));
if (error)
return error;
svr4_to_native_sigset(&nsss, &nbss);
}
error = sigprocmask1(p, how,
SCARG(uap, set) ? &nbss : NULL, SCARG(uap, oset) ? &obss : NULL);
if (error)
return error;
if (SCARG(uap, oset)) {
native_to_svr4_sigset(&obss, &osss);
error = copyout(&osss, SCARG(uap, oset), sizeof(osss));
if (error)
return error;
}
return 0;
}
int
svr4_sys_sigpending(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_sigpending_args /* {
syscallarg(int) what;
syscallarg(svr4_sigset_t *) set;
} */ *uap = v;
sigset_t bss;
svr4_sigset_t sss;
switch (SCARG(uap, what)) {
case 1: /* sigpending */
sigpending1(p, &bss);
native_to_svr4_sigset(&bss, &sss);
break;
case 2: /* sigfillset */
svr4_sigfillset(&sss);
break;
default:
return (EINVAL);
}
return (copyout(&sss, SCARG(uap, set), sizeof(sss)));
}
int
svr4_sys_sigsuspend(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_sigsuspend_args /* {
syscallarg(const svr4_sigset_t *) set;
} */ *uap = v;
svr4_sigset_t sss;
sigset_t bss;
int error;
if (SCARG(uap, set)) {
error = copyin(SCARG(uap, set), &sss, sizeof(sss));
if (error)
return (error);
svr4_to_native_sigset(&sss, &bss);
}
return (sigsuspend1(p, SCARG(uap, set) ? &bss : 0));
}
int
svr4_sys_pause(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
return (sigsuspend1(p, 0));
}
int
svr4_sys_kill(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_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) = svr4_to_native_sig[SCARG(uap, signum)];
return sys_kill(p, &ka, retval);
}
void
svr4_getcontext(p, uc, mask)
struct proc *p;
struct svr4_ucontext *uc;
sigset_t *mask;
{
void *sp;
struct svr4_sigaltstack *ss = &uc->uc_stack;
memset(uc, 0, sizeof(*uc));
/* get machine context */
sp = svr4_getmcontext(p, &uc->uc_mcontext, &uc->uc_flags);
/* get link */
uc->uc_link = p->p_ctxlink;
/* get stack state. XXX: solaris appears to do this */
#if 0
svr4_to_native_sigaltstack(&uc->uc_stack, &p->p_sigacts->ps_sigstk);
#else
ss->ss_sp = (void *)(((u_long) sp) & ~(16384 - 1));
ss->ss_size = 16384;
ss->ss_flags = 0;
#endif
/* get signal mask */
native_to_svr4_sigset(mask, &uc->uc_sigmask);
uc->uc_flags |= SVR4_UC_STACK|SVR4_UC_SIGMASK;
}
int
svr4_setcontext(p, uc)
struct proc *p;
struct svr4_ucontext *uc;
{
int error;
/* set machine context */
if ((error = svr4_setmcontext(p, &uc->uc_mcontext, uc->uc_flags)) != 0)
return error;
/* set link */
p->p_ctxlink = uc->uc_link;
/* set signal stack */
if (uc->uc_flags & SVR4_UC_STACK) {
svr4_to_native_sigaltstack(&uc->uc_stack,
&p->p_sigacts->ps_sigstk);
}
/* set signal mask */
if (uc->uc_flags & SVR4_UC_SIGMASK) {
sigset_t mask;
svr4_to_native_sigset(&uc->uc_sigmask, &mask);
(void)sigprocmask1(p, SIG_SETMASK, &mask, 0);
}
return EJUSTRETURN;
}
int
svr4_sys_context(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_context_args /* {
syscallarg(int) func;
syscallarg(struct svr4_ucontext *) uc;
} */ *uap = v;
struct svr4_ucontext uc;
int error;
*retval = 0;
switch (SCARG(uap, func)) {
case SVR4_GETCONTEXT:
DPRINTF(("getcontext(%p)\n", SCARG(uap, uc)));
svr4_getcontext(p, &uc, &p->p_sigmask);
return copyout(&uc, SCARG(uap, uc), sizeof(uc));
case SVR4_SETCONTEXT:
DPRINTF(("setcontext(%p)\n", SCARG(uap, uc)));
if (SCARG(uap, uc) == NULL)
exit1(p, W_EXITCODE(0, 0));
else if ((error = copyin(SCARG(uap, uc), &uc, sizeof(uc))) != 0)
return error;
else
return svr4_setcontext(p, &uc);
default:
DPRINTF(("context(%d, %p)\n", SCARG(uap, func),
SCARG(uap, uc)));
return ENOSYS;
}
return 0;
}