/* $NetBSD: netbsd32_compat_100.c,v 1.4 2024/05/20 01:30:33 christos Exp $ */

/* $NetBSD: netbsd32_compat_100.c,v 1.4 2024/05/20 01:30:33 christos Exp $ */

/*-
* Copyright (c) 2019 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software developed for The NetBSD Foundation
* by Christos Zoulas.
*
* 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 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: netbsd32_compat_100.c,v 1.4 2024/05/20 01:30:33 christos Exp $");

#include <sys/types.h>
#include <sys/filedesc.h>
#include <sys/event.h>
#include <sys/eventvar.h>
#include <sys/module.h>
#include <sys/syscallvar.h>
#include <sys/syscallargs.h>
#include <sys/systm.h>

#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_syscall.h>
#include <compat/netbsd32/netbsd32_syscallargs.h>
#include <compat/netbsd32/netbsd32_conv.h>
#include <compat/netbsd32/netbsd32_event.h>

static void
compat_100_netbsd32_to_kevent(const struct netbsd32_kevent100 *ke32,
struct kevent *ke)
{

memset(ke, 0, sizeof(*ke));
ke->ident = ke32->ident;
ke->filter = ke32->filter;
ke->flags = ke32->flags;
ke->fflags = ke32->fflags;
ke->data = ke32->data;
ke->udata = NETBSD32PTR64(ke32->udata);
}

static void
compat_100_netbsd32_from_kevent(const struct kevent *ke,
struct netbsd32_kevent100 *ke32)
{

memset(ke32, 0, sizeof(*ke32));
ke32->ident = ke->ident;
ke32->filter = ke->filter;
ke32->flags = ke->flags;
ke32->fflags = ke->fflags;
ke32->data = ke->data;
NETBSD32PTR32(ke32->udata, ke->udata);
}

int
compat_100_netbsd32_kevent_fetch_changes(void *ctx,
const struct kevent *changelist, struct kevent *changes, size_t index,
int n)
{
const struct netbsd32_kevent100 *src =
(const struct netbsd32_kevent100 *)changelist;
struct netbsd32_kevent100 *ke32, *changes32 = ctx;
int error, i;

error = copyin(src + index, changes32, n * sizeof(*changes32));
if (error)
return error;
for (i = 0, ke32 = changes32; i < n; i++, ke32++, changes++)
compat_100_netbsd32_to_kevent(ke32, changes);
return 0;
}

int
compat_100_netbsd32_kevent_put_events(void *ctx, struct kevent *events,
struct kevent *eventlist, size_t index, int n)
{
struct netbsd32_kevent100 *ke32, *events32 = ctx;
int i;

for (i = 0, ke32 = events32; i < n; i++, ke32++, events++)
compat_100_netbsd32_from_kevent(events, ke32);
ke32 = ((struct netbsd32_kevent100 *)eventlist) + index;
return copyout(events32, ke32, n * sizeof(*events32));
}

int
compat_100_netbsd32___kevent50(struct lwp *l,
const struct compat_100_netbsd32___kevent50_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(const netbsd32_kevent100p_t) changelist;
syscallarg(netbsd32_size_t) nchanges;
syscallarg(netbsd32_kevent100p_t) eventlist;
syscallarg(netbsd32_size_t) nevents;
syscallarg(netbsd32_timespecp_t) timeout;
} */
struct kevent_ops netbsd32_kevent_ops = {
.keo_fetch_timeout = netbsd32_kevent_fetch_timeout,
.keo_fetch_changes = compat_100_netbsd32_kevent_fetch_changes,
.keo_put_events = compat_100_netbsd32_kevent_put_events,
};

return netbsd32_kevent1(retval, SCARG(uap, fd),
(netbsd32_keventp_t)SCARG(uap, changelist), SCARG(uap, nchanges),
(netbsd32_keventp_t)SCARG(uap, eventlist), SCARG(uap, nevents),
SCARG(uap, timeout), &netbsd32_kevent_ops);
}

int
compat_100_netbsd32_dup3(struct lwp *l,
const struct compat_100_netbsd32_dup3_args *uap, register_t *retval)
{
/* {
syscallarg(int) from;
syscallarg(int) to;
syscallarg(int) flags;
syscallarg(const netbsd32_kevent100p_t) changelist;
syscallarg(netbsd32_size_t) nchanges;
syscallarg(netbsd32_kevent100p_t) eventlist;
syscallarg(netbsd32_size_t) nevents;
syscallarg(netbsd32_timespecp_t) timeout;
} */
return dodup(l, SCARG(uap, from), SCARG(uap, to), SCARG(uap, flags),
retval);
}

static struct syscall_package compat_netbsd32_100_syscalls[] = {
{ NETBSD32_SYS_compat_100_netbsd32___kevent50, 0,
(sy_call_t *)compat_100_netbsd32___kevent50 },
{ NETBSD32_SYS_compat_100_netbsd32_dup3, 0,
(sy_call_t *)compat_100_netbsd32_dup3 },
{ 0, 0, NULL },
};

MODULE(MODULE_CLASS_EXEC, compat_netbsd32_100, "compat_netbsd32,compat_100");

static int
compat_netbsd32_100_modcmd(modcmd_t cmd, void *arg)
{

switch (cmd) {
case MODULE_CMD_INIT:
return syscall_establish(&emul_netbsd32,
compat_netbsd32_100_syscalls);

case MODULE_CMD_FINI:
return syscall_disestablish(&emul_netbsd32,
compat_netbsd32_100_syscalls);

default:
return ENOTTY;
}
}