/*	$NetBSD: netbsd32_signal.c,v 1.8 2005/02/26 23:10:21 perry 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.
 * 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>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_signal.c,v 1.8 2005/02/26 23:10:21 perry 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/wait.h>

#include <uvm/uvm_extern.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>

int
netbsd32_sigaction(l, v, retval)
	struct lwp *l;
	void *v;
	register_t *retval;
{
	struct netbsd32_sigaction_args /* {
		syscallarg(int) signum;
		syscallarg(const netbsd32_sigactionp_t) nsa;
		syscallarg(netbsd32_sigactionp_t) osa;
	} */ *uap = v;
	struct sigaction nsa, osa;
	struct netbsd32_sigaction *sa32p, sa32;
	int error;

	if (SCARG(uap, nsa)) {
		sa32p =
		    (struct netbsd32_sigaction *)NETBSD32PTR64(SCARG(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->l_proc, SCARG(uap, signum),
			   SCARG(uap, nsa) ? &nsa : 0,
			   SCARG(uap, osa) ? &osa : 0,
			   NULL, 0);

	if (error)
		return (error);

	if (SCARG(uap, osa)) {
		sa32.netbsd32_sa_handler = (netbsd32_sigactionp_t)(u_long)osa.sa_handler;
		sa32.netbsd32_sa_mask = osa.sa_mask;
		sa32.netbsd32_sa_flags = osa.sa_flags;
		sa32p =
		    (struct netbsd32_sigaction *)NETBSD32PTR64(SCARG(uap, osa));
		if (copyout(&sa32, sa32p, sizeof(sa32)))
			return EFAULT;
	}

	return (0);
}

int
netbsd32___sigaltstack14(l, v, retval)
	struct lwp *l;
	void *v;
	register_t *retval;
{
	struct netbsd32___sigaltstack14_args /* {
		syscallarg(const netbsd32_sigaltstackp_t) nss;
		syscallarg(netbsd32_sigaltstackp_t) oss;
	} */ *uap = v;
	struct netbsd32_sigaltstack s32;
	struct sigaltstack nss, oss;
	int error;

	if (SCARG(uap, nss)) {
		error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, nss)), &s32,
		    sizeof(s32));
		if (error)
			return (error);
		nss.ss_sp = (void *)NETBSD32PTR64(s32.ss_sp);
		nss.ss_size = (size_t)s32.ss_size;
		nss.ss_flags = s32.ss_flags;
	}
	error = sigaltstack1(l->l_proc,
	    SCARG(uap, nss) ? &nss : 0, SCARG(uap, oss) ? &oss : 0);
	if (error)
		return (error);
	if (SCARG(uap, oss)) {
		s32.ss_sp = (netbsd32_voidp)(u_long)oss.ss_sp;
		s32.ss_size = (netbsd32_size_t)oss.ss_size;
		s32.ss_flags = oss.ss_flags;
		error = copyout(&s32, (caddr_t)NETBSD32PTR64(SCARG(uap, oss)),
		    sizeof(s32));
		if (error)
			return (error);
	}
	return (0);
}

/* ARGSUSED */
int
netbsd32___sigaction14(l, v, retval)
	struct lwp *l;
	void *v;
	register_t *retval;
{
	struct netbsd32___sigaction14_args /* {
		syscallarg(int) signum;
		syscallarg(const struct sigaction *) nsa;
		syscallarg(struct sigaction *) osa;
	} */ *uap = v;
	struct netbsd32_sigaction sa32;
	struct sigaction nsa, osa;
	int error;

	if (SCARG(uap, nsa)) {
		error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, nsa)), &sa32,
		    sizeof(sa32));
		if (error)
			return (error);
		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->l_proc, SCARG(uap, signum),
	    SCARG(uap, nsa) ? &nsa : 0, SCARG(uap, osa) ? &osa : 0,
	    NULL, 0);
	if (error)
		return (error);
	if (SCARG(uap, osa)) {
		sa32.netbsd32_sa_handler = (netbsd32_voidp)(u_long)osa.sa_handler;
		sa32.netbsd32_sa_mask = osa.sa_mask;
		sa32.netbsd32_sa_flags = osa.sa_flags;
		error = copyout(&sa32, (caddr_t)NETBSD32PTR64(SCARG(uap, osa)),
		    sizeof(sa32));
		if (error)
			return (error);
	}
	return (0);
}

/* ARGSUSED */
int
netbsd32___sigaction_sigtramp(l, v, retval)
	struct lwp *l;
	void *v;
	register_t *retval;
{
	struct netbsd32___sigaction_sigtramp_args /* {
		syscallarg(int) signum;
		syscallarg(const netbsd32_sigactionp_t) nsa;
		syscallarg(netbsd32_sigactionp_t) osa;
		syscallarg(netbsd32_voidp) tramp;
		syscallarg(int) vers;
	} */ *uap = v;
	struct proc *p = l->l_proc;
	struct netbsd32_sigaction sa32;
	struct sigaction nsa, osa;
	int error;

	if (SCARG(uap, nsa)) {
		error = copyin((caddr_t)NETBSD32PTR64(SCARG(uap, nsa)), &sa32,
		    sizeof(sa32));
		if (error)
			return (error);
		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(p, SCARG(uap, signum),
	    SCARG(uap, nsa) ? &nsa : 0, SCARG(uap, osa) ? &osa : 0,
	    NETBSD32PTR64(SCARG(uap, tramp)), SCARG(uap, vers));
	if (error)
		return (error);
	if (SCARG(uap, osa)) {
		sa32.netbsd32_sa_handler = (netbsd32_voidp)(u_long)osa.sa_handler;
		sa32.netbsd32_sa_mask = osa.sa_mask;
		sa32.netbsd32_sa_flags = osa.sa_flags;
		error = copyout(&sa32, (caddr_t)NETBSD32PTR64(SCARG(uap, osa)),
		    sizeof(sa32));
		if (error)
			return (error);
	}
	return (0);
}

void
netbsd32_si32_to_si(siginfo_t *si, 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 = (void *)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_sigval.sival_int = si32->si_sigval.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;
	}
}

void
netbsd32_si_to_si32(siginfo32_t *si32, 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 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_sigval.sival_int = si->si_sigval.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;

	p = l->l_proc;

	ucp->uc_flags = 0;
	ucp->uc_link = (uint32_t)(intptr_t)l->l_ctxlink;

	(void)sigprocmask1(p, 0, NULL, &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 ((p->p_sigctx.ps_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)p->p_sigctx.ps_sigstk.ss_sp;
		ucp->uc_stack.ss_size = p->p_sigctx.ps_sigstk.ss_size;
		ucp->uc_stack.ss_flags = p->p_sigctx.ps_sigstk.ss_flags;
	}
	ucp->uc_flags |= _UC_STACK;

	cpu_getmcontext32(l, &ucp->uc_mcontext, &ucp->uc_flags);
}

/* ARGSUSED */
int
netbsd32_getcontext(struct lwp *l, void *v, register_t *retval)
{
	struct netbsd32_getcontext_args /* {
		syscallarg(netbsd32_ucontextp) ucp;
	} */ *uap = v;
	ucontext32_t uc;

	getucontext32(l, &uc);

	return copyout(&uc, NETBSD32PTR64(SCARG(uap, ucp)),
	    sizeof (ucontext32_t));
}

int
setucontext32(struct lwp *l, const ucontext32_t *ucp)
{
	struct proc	*p;
	int		error;

	p = l->l_proc;
	if ((error = cpu_setmcontext32(l, &ucp->uc_mcontext,
	     ucp->uc_flags)) != 0)
		return (error);
	l->l_ctxlink = (void *)(intptr_t)ucp->uc_link;
	/*
	 * We might want to take care of the stack portion here but currently
	 * don't; see the comment in getucontext().
	 */
	if ((ucp->uc_flags & _UC_SIGMASK) != 0)
		sigprocmask1(p, SIG_SETMASK, &ucp->uc_sigmask, NULL);

	return 0;
}

/* ARGSUSED */
int
netbsd32_setcontext(struct lwp *l, void *v, register_t *retval)
{
	struct netbsd32_setcontext_args /* {
		syscallarg(netbsd32_ucontextp) ucp;
	} */ *uap = v;
	ucontext32_t uc;
	int error;
	void *p;

	p = NETBSD32PTR64(SCARG(uap, ucp));
	if (p == NULL)
		exit1(l, W_EXITCODE(0, 0));
	else if ((error = copyin(p, &uc, sizeof (uc))) != 0 ||
	    (error = setucontext32(l, &uc)) != 0)
		return (error);

	return (EJUSTRETURN);
}