1 /* $NetBSD: netbsd32_compat_100.c,v 1.3 2023/07/29 12:48:15 rin Exp $ */
2
3 /*-
4 * Copyright (c) 2019 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software developed for The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: netbsd32_compat_100.c,v 1.3 2023/07/29 12:48:15 rin Exp $");
34
35 #include <sys/types.h>
36 #include <sys/event.h>
37 #include <sys/eventvar.h>
38 #include <sys/module.h>
39 #include <sys/syscallvar.h>
40 #include <sys/syscallargs.h>
41 #include <sys/systm.h>
42
43 #include <compat/netbsd32/netbsd32.h>
44 #include <compat/netbsd32/netbsd32_syscall.h>
45 #include <compat/netbsd32/netbsd32_syscallargs.h>
46 #include <compat/netbsd32/netbsd32_conv.h>
47 #include <compat/netbsd32/netbsd32_event.h>
48
49 static void
compat_100_netbsd32_to_kevent(const struct netbsd32_kevent100 * ke32,struct kevent * ke)50 compat_100_netbsd32_to_kevent(const struct netbsd32_kevent100 *ke32,
51 struct kevent *ke)
52 {
53
54 memset(ke, 0, sizeof(*ke));
55 ke->ident = ke32->ident;
56 ke->filter = ke32->filter;
57 ke->flags = ke32->flags;
58 ke->fflags = ke32->fflags;
59 ke->data = ke32->data;
60 ke->udata = NETBSD32PTR64(ke32->udata);
61 }
62
63 static void
compat_100_netbsd32_from_kevent(const struct kevent * ke,struct netbsd32_kevent100 * ke32)64 compat_100_netbsd32_from_kevent(const struct kevent *ke,
65 struct netbsd32_kevent100 *ke32)
66 {
67
68 memset(ke32, 0, sizeof(*ke32));
69 ke32->ident = ke->ident;
70 ke32->filter = ke->filter;
71 ke32->flags = ke->flags;
72 ke32->fflags = ke->fflags;
73 ke32->data = ke->data;
74 NETBSD32PTR32(ke32->udata, ke->udata);
75 }
76
77 int
compat_100_netbsd32_kevent_fetch_changes(void * ctx,const struct kevent * changelist,struct kevent * changes,size_t index,int n)78 compat_100_netbsd32_kevent_fetch_changes(void *ctx,
79 const struct kevent *changelist, struct kevent *changes, size_t index,
80 int n)
81 {
82 const struct netbsd32_kevent100 *src =
83 (const struct netbsd32_kevent100 *)changelist;
84 struct netbsd32_kevent100 *ke32, *changes32 = ctx;
85 int error, i;
86
87 error = copyin(src + index, changes32, n * sizeof(*changes32));
88 if (error)
89 return error;
90 for (i = 0, ke32 = changes32; i < n; i++, ke32++, changes++)
91 compat_100_netbsd32_to_kevent(ke32, changes);
92 return 0;
93 }
94
95 int
compat_100_netbsd32_kevent_put_events(void * ctx,struct kevent * events,struct kevent * eventlist,size_t index,int n)96 compat_100_netbsd32_kevent_put_events(void *ctx, struct kevent *events,
97 struct kevent *eventlist, size_t index, int n)
98 {
99 struct netbsd32_kevent100 *ke32, *events32 = ctx;
100 int i;
101
102 for (i = 0, ke32 = events32; i < n; i++, ke32++, events++)
103 compat_100_netbsd32_from_kevent(events, ke32);
104 ke32 = ((struct netbsd32_kevent100 *)eventlist) + index;
105 return copyout(events32, ke32, n * sizeof(*events32));
106 }
107
108 int
compat_100_netbsd32___kevent50(struct lwp * l,const struct compat_100_netbsd32___kevent50_args * uap,register_t * retval)109 compat_100_netbsd32___kevent50(struct lwp *l,
110 const struct compat_100_netbsd32___kevent50_args *uap, register_t *retval)
111 {
112 /* {
113 syscallarg(int) fd;
114 syscallarg(const netbsd32_kevent100p_t) changelist;
115 syscallarg(netbsd32_size_t) nchanges;
116 syscallarg(netbsd32_kevent100p_t) eventlist;
117 syscallarg(netbsd32_size_t) nevents;
118 syscallarg(netbsd32_timespecp_t) timeout;
119 } */
120 struct kevent_ops netbsd32_kevent_ops = {
121 .keo_fetch_timeout = netbsd32_kevent_fetch_timeout,
122 .keo_fetch_changes = compat_100_netbsd32_kevent_fetch_changes,
123 .keo_put_events = compat_100_netbsd32_kevent_put_events,
124 };
125
126 return netbsd32_kevent1(retval, SCARG(uap, fd),
127 (netbsd32_keventp_t)SCARG(uap, changelist), SCARG(uap, nchanges),
128 (netbsd32_keventp_t)SCARG(uap, eventlist), SCARG(uap, nevents),
129 SCARG(uap, timeout), &netbsd32_kevent_ops);
130 }
131
132 static struct syscall_package compat_netbsd32_100_syscalls[] = {
133 { NETBSD32_SYS_compat_100_netbsd32___kevent50, 0,
134 (sy_call_t *)compat_100_netbsd32___kevent50 },
135 { 0, 0, NULL },
136 };
137
138 MODULE(MODULE_CLASS_EXEC, compat_netbsd32_100, "compat_netbsd32,compat_100");
139
140 static int
compat_netbsd32_100_modcmd(modcmd_t cmd,void * arg)141 compat_netbsd32_100_modcmd(modcmd_t cmd, void *arg)
142 {
143
144 switch (cmd) {
145 case MODULE_CMD_INIT:
146 return syscall_establish(&emul_netbsd32,
147 compat_netbsd32_100_syscalls);
148
149 case MODULE_CMD_FINI:
150 return syscall_disestablish(&emul_netbsd32,
151 compat_netbsd32_100_syscalls);
152
153 default:
154 return ENOTTY;
155 }
156 }
157