NetBSD-5.0.2/sys/compat/netbsd32/netbsd32_signal.c
/* $NetBSD: netbsd32_signal.c,v 1.31 2008/10/15 06:51:19 wrstuden Exp $ */
/*
* Copyright (c) 1998, 2001 Matthew R. Green
* 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.
*
* 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>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_signal.c,v 1.31 2008/10/15 06:51:19 wrstuden Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/signalvar.h>
#include <sys/proc.h>
#include <sys/sa.h>
#include <sys/savar.h>
#include <sys/wait.h>
#include <sys/dirent.h>
#include <uvm/uvm_extern.h>
#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_conv.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>
#include <compat/netbsd32/netbsd32_sa.h>
#include <compat/sys/signal.h>
#include <compat/sys/signalvar.h>
#include <compat/sys/siginfo.h>
#include <compat/sys/ucontext.h>
#include <compat/common/compat_sigaltstack.h>
#ifdef unused
static void netbsd32_si32_to_si(siginfo_t *, const siginfo32_t *);
#endif
int
netbsd32_sigaction(struct lwp *l, const struct netbsd32_sigaction_args *uap, register_t *retval)
{
/* {
syscallarg(int) signum;
syscallarg(const netbsd32_sigactionp_t) nsa;
syscallarg(netbsd32_sigactionp_t) osa;
} */
struct sigaction nsa, osa;
struct netbsd32_sigaction *sa32p, sa32;
int error;
if (SCARG_P32(uap, nsa)) {
sa32p = SCARG_P32(uap, nsa);
if (copyin(sa32p, &sa32, sizeof(sa32)))
return EFAULT;
nsa.sa_handler = (void *)NETBSD32PTR64(sa32.netbsd32_sa_handler);
nsa.sa_mask = sa32.netbsd32_sa_mask;
nsa.sa_flags = sa32.netbsd32_sa_flags;
}
error = sigaction1(l, SCARG(uap, signum),
SCARG_P32(uap, nsa) ? &nsa : 0,
SCARG_P32(uap, osa) ? &osa : 0,
NULL, 0);
if (error)
return (error);
if (SCARG_P32(uap, osa)) {
NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
sa32.netbsd32_sa_mask = osa.sa_mask;
sa32.netbsd32_sa_flags = osa.sa_flags;
sa32p = SCARG_P32(uap, osa);
if (copyout(&sa32, sa32p, sizeof(sa32)))
return EFAULT;
}
return (0);
}
int
netbsd32___sigaltstack14(struct lwp *l, const struct netbsd32___sigaltstack14_args *uap, register_t *retval)
{
/* {
syscallarg(const netbsd32_sigaltstackp_t) nss;
syscallarg(netbsd32_sigaltstackp_t) oss;
} */
compat_sigaltstack(uap, netbsd32_sigaltstack, SS_ONSTACK, SS_DISABLE);
}
/* ARGSUSED */
int
netbsd32___sigaction14(struct lwp *l, const struct netbsd32___sigaction14_args *uap, register_t *retval)
{
/* {
syscallarg(int) signum;
syscallarg(const struct sigaction *) nsa;
syscallarg(struct sigaction *) osa;
} */
struct netbsd32_sigaction sa32;
struct sigaction nsa, osa;
int error;
if (SCARG_P32(uap, nsa)) {
error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32));
if (error)
return (error);
nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler);
nsa.sa_mask = sa32.netbsd32_sa_mask;
nsa.sa_flags = sa32.netbsd32_sa_flags;
}
error = sigaction1(l, SCARG(uap, signum),
SCARG_P32(uap, nsa) ? &nsa : 0,
SCARG_P32(uap, osa) ? &osa : 0,
NULL, 0);
if (error)
return (error);
if (SCARG_P32(uap, osa)) {
NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
sa32.netbsd32_sa_mask = osa.sa_mask;
sa32.netbsd32_sa_flags = osa.sa_flags;
error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32));
if (error)
return (error);
}
return (0);
}
/* ARGSUSED */
int
netbsd32___sigaction_sigtramp(struct lwp *l, const struct netbsd32___sigaction_sigtramp_args *uap, register_t *retval)
{
/* {
syscallarg(int) signum;
syscallarg(const netbsd32_sigactionp_t) nsa;
syscallarg(netbsd32_sigactionp_t) osa;
syscallarg(netbsd32_voidp) tramp;
syscallarg(int) vers;
} */
struct netbsd32_sigaction sa32;
struct sigaction nsa, osa;
int error;
if (SCARG_P32(uap, nsa)) {
error = copyin(SCARG_P32(uap, nsa), &sa32, sizeof(sa32));
if (error)
return (error);
nsa.sa_handler = NETBSD32PTR64(sa32.netbsd32_sa_handler);
nsa.sa_mask = sa32.netbsd32_sa_mask;
nsa.sa_flags = sa32.netbsd32_sa_flags;
}
error = sigaction1(l, SCARG(uap, signum),
SCARG_P32(uap, nsa) ? &nsa : 0,
SCARG_P32(uap, osa) ? &osa : 0,
SCARG_P32(uap, tramp), SCARG(uap, vers));
if (error)
return (error);
if (SCARG_P32(uap, osa)) {
NETBSD32PTR32(sa32.netbsd32_sa_handler, osa.sa_handler);
sa32.netbsd32_sa_mask = osa.sa_mask;
sa32.netbsd32_sa_flags = osa.sa_flags;
error = copyout(&sa32, SCARG_P32(uap, osa), sizeof(sa32));
if (error)
return (error);
}
return (0);
}
#ifdef unused
static void
netbsd32_si32_to_si(siginfo_t *si, const siginfo32_t *si32)
{
memset(si, 0, sizeof (*si));
si->si_signo = si32->si_signo;
si->si_code = si32->si_code;
si->si_errno = si32->si_errno;
switch (si32->si_signo) {
case SIGILL:
case SIGBUS:
case SIGSEGV:
case SIGFPE:
case SIGTRAP:
si->si_addr = NETBSD32PTR64(si32->si_addr);
si->si_trap = si32->si_trap;
break;
case SIGALRM:
case SIGVTALRM:
case SIGPROF:
si->si_pid = si32->si_pid;
si->si_uid = si32->si_uid;
/*
* XXX sival_ptr is currently unused.
*/
si->si_value.sival_int = si32->si_value.sival_int;
break;
case SIGCHLD:
si->si_pid = si32->si_pid;
si->si_uid = si32->si_uid;
si->si_utime = si32->si_utime;
si->si_stime = si32->si_stime;
break;
case SIGURG:
case SIGIO:
si->si_band = si32->si_band;
si->si_fd = si32->si_fd;
break;
}
}
#endif
void
netbsd32_si_to_si32(siginfo32_t *si32, const siginfo_t *si)
{
memset(si32, 0, sizeof (*si32));
si32->si_signo = si->si_signo;
si32->si_code = si->si_code;
si32->si_errno = si->si_errno;
switch (si32->si_signo) {
case 0: /* SA */
si32->si_value.sival_int = si->si_value.sival_int;
break;
case SIGILL:
case SIGBUS:
case SIGSEGV:
case SIGFPE:
case SIGTRAP:
si32->si_addr = (uint32_t)(uintptr_t)si->si_addr;
si32->si_trap = si->si_trap;
break;
case SIGALRM:
case SIGVTALRM:
case SIGPROF:
si32->si_pid = si->si_pid;
si32->si_uid = si->si_uid;
/*
* XXX sival_ptr is currently unused.
*/
si32->si_value.sival_int = si->si_value.sival_int;
break;
case SIGCHLD:
si32->si_pid = si->si_pid;
si32->si_uid = si->si_uid;
si32->si_status = si->si_status;
si32->si_utime = si->si_utime;
si32->si_stime = si->si_stime;
break;
case SIGURG:
case SIGIO:
si32->si_band = si->si_band;
si32->si_fd = si->si_fd;
break;
}
}
void
getucontext32(struct lwp *l, ucontext32_t *ucp)
{
struct proc *p = l->l_proc;
KASSERT(mutex_owned(p->p_lock));
ucp->uc_flags = 0;
ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink;
if (p->p_sa != NULL)
ucp->uc_sigmask = p->p_sa->sa_sigmask;
else
ucp->uc_sigmask = l->l_sigmask;
ucp->uc_flags |= _UC_SIGMASK;
/*
* The (unsupplied) definition of the `current execution stack'
* in the System V Interface Definition appears to allow returning
* the main context stack.
*/
if ((l->l_sigstk.ss_flags & SS_ONSTACK) == 0) {
ucp->uc_stack.ss_sp = USRSTACK32;
ucp->uc_stack.ss_size = ctob(p->p_vmspace->vm_ssize);
ucp->uc_stack.ss_flags = 0; /* XXX, def. is Very Fishy */
} else {
/* Simply copy alternate signal execution stack. */
ucp->uc_stack.ss_sp =
(uint32_t)(intptr_t)l->l_sigstk.ss_sp;
ucp->uc_stack.ss_size = l->l_sigstk.ss_size;
ucp->uc_stack.ss_flags = l->l_sigstk.ss_flags;
}
ucp->uc_flags |= _UC_STACK;
mutex_exit(p->p_lock);
cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags);
mutex_enter(p->p_lock);
}
/*
* getucontext32_sa:
* Get a ucontext32_t for use in SA upcall generation.
* Tweaked version of getucontext32. We 1) do not take p_lock, 2)
* fudge things with uc_link (which is usually NULL for libpthread
* code), and 3) we report an empty signal mask.
*/
void
getucontext32_sa(struct lwp *l, ucontext32_t *ucp)
{
struct proc *p = l->l_proc;
ucp->uc_flags = 0;
ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink;
sigemptyset(&ucp->uc_sigmask);
ucp->uc_flags |= _UC_SIGMASK;
/*
* The (unsupplied) definition of the `current execution stack'
* in the System V Interface Definition appears to allow returning
* the main context stack.
*/
if ((l->l_sigstk.ss_flags & SS_ONSTACK) == 0) {
ucp->uc_stack.ss_sp = USRSTACK32;
ucp->uc_stack.ss_size = ctob(p->p_vmspace->vm_ssize);
ucp->uc_stack.ss_flags = 0; /* XXX, def. is Very Fishy */
} else {
/* Simply copy alternate signal execution stack. */
ucp->uc_stack.ss_sp =
(uint32_t)(intptr_t)l->l_sigstk.ss_sp;
ucp->uc_stack.ss_size = l->l_sigstk.ss_size;
ucp->uc_stack.ss_flags = l->l_sigstk.ss_flags;
}
ucp->uc_flags |= _UC_STACK;
cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags);
}
/* ARGSUSED */
int
netbsd32_getcontext(struct lwp *l, const struct netbsd32_getcontext_args *uap, register_t *retval)
{
/* {
syscallarg(netbsd32_ucontextp) ucp;
} */
struct proc *p = l->l_proc;
ucontext32_t uc;
mutex_enter(p->p_lock);
getucontext32(l, &uc);
mutex_exit(p->p_lock);
return copyout(&uc, SCARG_P32(uap, ucp), sizeof (ucontext32_t));
}
int
setucontext32(struct lwp *l, const ucontext32_t *ucp)
{
struct proc *p = l->l_proc;
int error;
KASSERT(mutex_owned(p->p_lock));
if ((ucp->uc_flags & _UC_SIGMASK) != 0) {
error = sigprocmask1(l, SIG_SETMASK, &ucp->uc_sigmask, NULL);
if (error != 0)
return error;
}
mutex_exit(p->p_lock);
error = cpu_setmcontext32(l, &ucp->uc_mcontext, ucp->uc_flags);
mutex_enter(p->p_lock);
if (error != 0)
return (error);
l->l_ctxlink = (void *)(intptr_t)ucp->uc_link;
/*
* If there was stack information, update whether or not we are
* still running on an alternate signal stack.
*/
if ((ucp->uc_flags & _UC_STACK) != 0) {
if (ucp->uc_stack.ss_flags & SS_ONSTACK)
l->l_sigstk.ss_flags |= SS_ONSTACK;
else
l->l_sigstk.ss_flags &= ~SS_ONSTACK;
}
return 0;
}
/* ARGSUSED */
int
netbsd32_setcontext(struct lwp *l, const struct netbsd32_setcontext_args *uap, register_t *retval)
{
/* {
syscallarg(netbsd32_ucontextp) ucp;
} */
ucontext32_t uc;
int error;
struct proc *p = l->l_proc;
error = copyin(SCARG_P32(uap, ucp), &uc, sizeof (uc));
if (error)
return (error);
if (!(uc.uc_flags & _UC_CPU))
return (EINVAL);
mutex_enter(p->p_lock);
error = setucontext32(l, &uc);
mutex_exit(p->p_lock);
if (error)
return (error);
return (EJUSTRETURN);
}
static int
netbsd32_sigtimedwait_put_info(const void *src, void *dst, size_t size)
{
const siginfo_t *info = src;
siginfo32_t info32;
netbsd32_si_to_si32(&info32, info);
return copyout(&info32, dst, sizeof(info32));
}
static int
netbsd32_sigtimedwait_fetch_timeout(const void *src, void *dst, size_t size)
{
struct timespec *ts = dst;
struct netbsd32_timespec ts32;
int error;
error = copyin(src, &ts32, sizeof(ts32));
if (error)
return error;
netbsd32_to_timespec(&ts32, ts);
return 0;
}
static int
netbsd32_sigtimedwait_put_timeout(const void *src, void *dst, size_t size)
{
const struct timespec *ts = src;
struct netbsd32_timespec ts32;
netbsd32_from_timespec(ts, &ts32);
return copyout(&ts32, dst, sizeof(ts32));
}
int
netbsd32___sigtimedwait(struct lwp *l, const struct netbsd32___sigtimedwait_args *uap, register_t *retval)
{
/* {
syscallarg(netbsd32_sigsetp_t) set;
syscallarg(netbsd32_siginfop_t) info;
syscallarg(netbsd32_timespecp_t) timeout;
} */
struct sys___sigtimedwait_args ua;
NETBSD32TOP_UAP(set, const sigset_t);
NETBSD32TOP_UAP(info, siginfo_t);
NETBSD32TOP_UAP(timeout, struct timespec);
return __sigtimedwait1(l, &ua, retval, netbsd32_sigtimedwait_put_info,
netbsd32_sigtimedwait_fetch_timeout,
netbsd32_sigtimedwait_put_timeout);
}