1 /* $NetBSD: netbsd32_compat_100.c,v 1.4 2024/05/20 01:30:33 christos 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 1.4 2024/05/20 01:30:33 christos Exp $");
34
35 #include <sys/types.h>
36 #include <sys/filedesc.h>
37 #include <sys/event.h>
38 #include <sys/eventvar.h>
39 #include <sys/module.h>
40 #include <sys/syscallvar.h>
41 #include <sys/syscallargs.h>
42 #include <sys/systm.h>
43
44 #include <compat/netbsd32/netbsd32.h>
45 #include <compat/netbsd32/netbsd32_syscall.h>
46 #include <compat/netbsd32/netbsd32_syscallargs.h>
47 #include <compat/netbsd32/netbsd32_conv.h>
48 #include <compat/netbsd32/netbsd32_event.h>
49
50 static void
compat_100_netbsd32_to_kevent(const struct netbsd32_kevent100 * ke32,struct kevent * ke)51 compat_100_netbsd32_to_kevent(const struct netbsd32_kevent100 *ke32,
52 struct kevent *ke)
53 {
54
55 memset(ke, 0, sizeof(*ke));
56 ke->ident = ke32->ident;
57 ke->filter = ke32->filter;
58 ke->flags = ke32->flags;
59 ke->fflags = ke32->fflags;
60 ke->data = ke32->data;
61 ke->udata = NETBSD32PTR64(ke32->udata);
62 }
63
64 static void
compat_100_netbsd32_from_kevent(const struct kevent * ke,struct netbsd32_kevent100 * ke32)65 compat_100_netbsd32_from_kevent(const struct kevent *ke,
66 struct netbsd32_kevent100 *ke32)
67 {
68
69 memset(ke32, 0, sizeof(*ke32));
70 ke32->ident = ke->ident;
71 ke32->filter = ke->filter;
72 ke32->flags = ke->flags;
73 ke32->fflags = ke->fflags;
74 ke32->data = ke->data;
75 NETBSD32PTR32(ke32->udata, ke->udata);
76 }
77
78 int
compat_100_netbsd32_kevent_fetch_changes(void * ctx,const struct kevent * changelist,struct kevent * changes,size_t index,int n)79 compat_100_netbsd32_kevent_fetch_changes(void *ctx,
80 const struct kevent *changelist, struct kevent *changes, size_t index,
81 int n)
82 {
83 const struct netbsd32_kevent100 *src =
84 (const struct netbsd32_kevent100 *)changelist;
85 struct netbsd32_kevent100 *ke32, *changes32 = ctx;
86 int error, i;
87
88 error = copyin(src + index, changes32, n * sizeof(*changes32));
89 if (error)
90 return error;
91 for (i = 0, ke32 = changes32; i < n; i++, ke32++, changes++)
92 compat_100_netbsd32_to_kevent(ke32, changes);
93 return 0;
94 }
95
96 int
compat_100_netbsd32_kevent_put_events(void * ctx,struct kevent * events,struct kevent * eventlist,size_t index,int n)97 compat_100_netbsd32_kevent_put_events(void *ctx, struct kevent *events,
98 struct kevent *eventlist, size_t index, int n)
99 {
100 struct netbsd32_kevent100 *ke32, *events32 = ctx;
101 int i;
102
103 for (i = 0, ke32 = events32; i < n; i++, ke32++, events++)
104 compat_100_netbsd32_from_kevent(events, ke32);
105 ke32 = ((struct netbsd32_kevent100 *)eventlist) + index;
106 return copyout(events32, ke32, n * sizeof(*events32));
107 }
108
109 int
compat_100_netbsd32___kevent50(struct lwp * l,const struct compat_100_netbsd32___kevent50_args * uap,register_t * retval)110 compat_100_netbsd32___kevent50(struct lwp *l,
111 const struct compat_100_netbsd32___kevent50_args *uap, register_t *retval)
112 {
113 /* {
114 syscallarg(int) fd;
115 syscallarg(const netbsd32_kevent100p_t) changelist;
116 syscallarg(netbsd32_size_t) nchanges;
117 syscallarg(netbsd32_kevent100p_t) eventlist;
118 syscallarg(netbsd32_size_t) nevents;
119 syscallarg(netbsd32_timespecp_t) timeout;
120 } */
121 struct kevent_ops netbsd32_kevent_ops = {
122 .keo_fetch_timeout = netbsd32_kevent_fetch_timeout,
123 .keo_fetch_changes = compat_100_netbsd32_kevent_fetch_changes,
124 .keo_put_events = compat_100_netbsd32_kevent_put_events,
125 };
126
127 return netbsd32_kevent1(retval, SCARG(uap, fd),
128 (netbsd32_keventp_t)SCARG(uap, changelist), SCARG(uap, nchanges),
129 (netbsd32_keventp_t)SCARG(uap, eventlist), SCARG(uap, nevents),
130 SCARG(uap, timeout), &netbsd32_kevent_ops);
131 }
132
133 int
compat_100_netbsd32_dup3(struct lwp * l,const struct compat_100_netbsd32_dup3_args * uap,register_t * retval)134 compat_100_netbsd32_dup3(struct lwp *l,
135 const struct compat_100_netbsd32_dup3_args *uap, register_t *retval)
136 {
137 /* {
138 syscallarg(int) from;
139 syscallarg(int) to;
140 syscallarg(int) flags;
141 syscallarg(const netbsd32_kevent100p_t) changelist;
142 syscallarg(netbsd32_size_t) nchanges;
143 syscallarg(netbsd32_kevent100p_t) eventlist;
144 syscallarg(netbsd32_size_t) nevents;
145 syscallarg(netbsd32_timespecp_t) timeout;
146 } */
147 return dodup(l, SCARG(uap, from), SCARG(uap, to), SCARG(uap, flags),
148 retval);
149 }
150
151 static struct syscall_package compat_netbsd32_100_syscalls[] = {
152 { NETBSD32_SYS_compat_100_netbsd32___kevent50, 0,
153 (sy_call_t *)compat_100_netbsd32___kevent50 },
154 { NETBSD32_SYS_compat_100_netbsd32_dup3, 0,
155 (sy_call_t *)compat_100_netbsd32_dup3 },
156 { 0, 0, NULL },
157 };
158
159 MODULE(MODULE_CLASS_EXEC, compat_netbsd32_100, "compat_netbsd32,compat_100");
160
161 static int
compat_netbsd32_100_modcmd(modcmd_t cmd,void * arg)162 compat_netbsd32_100_modcmd(modcmd_t cmd, void *arg)
163 {
164
165 switch (cmd) {
166 case MODULE_CMD_INIT:
167 return syscall_establish(&emul_netbsd32,
168 compat_netbsd32_100_syscalls);
169
170 case MODULE_CMD_FINI:
171 return syscall_disestablish(&emul_netbsd32,
172 compat_netbsd32_100_syscalls);
173
174 default:
175 return ENOTTY;
176 }
177 }
178