1 /* $NetBSD: kern_50.c,v 1.3 2020/01/29 15:47:51 ad Exp $ */
2
3 /*-
4 * Copyright (c) 2008, 2009, 2020 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to 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 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: kern_50.c,v 1.3 2020/01/29 15:47:51 ad Exp $");
33
34 #if defined(_KERNEL_OPT)
35 #include "opt_compat_netbsd.h"
36 #endif
37
38 #include <sys/param.h>
39 #include <sys/lwp.h>
40 #include <sys/proc.h>
41 #include <sys/syscall.h>
42 #include <sys/syscallvar.h>
43 #include <sys/syscallargs.h>
44
45 #include <compat/sys/resource.h>
46 #include <compat/sys/time.h>
47
48 #include <compat/common/compat_mod.h>
49
50 static const struct syscall_package kern_50_syscalls[] = {
51 { SYS_compat_50__lwp_park, 0, (sy_call_t *)compat_50_sys__lwp_park },
52 { SYS_compat_50___sigtimedwait, 0,
53 (sy_call_t *)compat_50_sys___sigtimedwait },
54 { SYS_compat_50_wait4, 0, (sy_call_t *)compat_50_sys_wait4 },
55 { 0, 0, NULL }
56 };
57
58 int
compat_50_sys__lwp_park(struct lwp * l,const struct compat_50_sys__lwp_park_args * uap,register_t * retval)59 compat_50_sys__lwp_park(struct lwp *l,
60 const struct compat_50_sys__lwp_park_args *uap, register_t *retval)
61 {
62 /* {
63 syscallarg(const struct timespec50 *) ts;
64 syscallarg(lwpid_t) unpark;
65 syscallarg(const void *) hint;
66 syscallarg(const void *) unparkhint;
67 } */
68 struct timespec ts, *tsp;
69 struct timespec50 ts50;
70 int error;
71
72 if (SCARG(uap, ts) == NULL)
73 tsp = NULL;
74 else {
75 error = copyin(SCARG(uap, ts), &ts50, sizeof(ts50));
76 if (error != 0)
77 return error;
78 timespec50_to_timespec(&ts50, &ts);
79 tsp = &ts;
80 }
81
82 if (SCARG(uap, unpark) != 0) {
83 error = lwp_unpark(&SCARG(uap, unpark), 1);
84 if (error != 0)
85 return error;
86 }
87
88 return lwp_park(CLOCK_REALTIME, TIMER_ABSTIME, tsp);
89 }
90
91 static int
tscopyin(const void * u,void * s,size_t len)92 tscopyin(const void *u, void *s, size_t len)
93 {
94 struct timespec50 ts50;
95 int error;
96
97 KASSERT(len == sizeof(struct timespec));
98 error = copyin(u, &ts50, sizeof(ts50));
99 if (error)
100 return error;
101 timespec50_to_timespec(&ts50, s);
102 return 0;
103 }
104
105 static int
tscopyout(const void * s,void * u,size_t len)106 tscopyout(const void *s, void *u, size_t len)
107 {
108 struct timespec50 ts50;
109
110 KASSERT(len == sizeof(struct timespec));
111 timespec_to_timespec50(s, &ts50);
112 return copyout(&ts50, u, sizeof(ts50));
113 }
114
115 int
compat_50_sys___sigtimedwait(struct lwp * l,const struct compat_50_sys___sigtimedwait_args * uap,register_t * retval)116 compat_50_sys___sigtimedwait(struct lwp *l,
117 const struct compat_50_sys___sigtimedwait_args *uap, register_t *retval)
118 {
119 int res;
120
121 res = sigtimedwait1(l,
122 (const struct sys_____sigtimedwait50_args *)uap, retval, copyin,
123 copyout, tscopyin, tscopyout);
124 if (!res)
125 *retval = 0; /* XXX NetBSD<=5 was not POSIX compliant */
126 return res;
127 }
128
129 int
compat_50_sys_wait4(struct lwp * l,const struct compat_50_sys_wait4_args * uap,register_t * retval)130 compat_50_sys_wait4(struct lwp *l, const struct compat_50_sys_wait4_args *uap,
131 register_t *retval)
132 {
133 /* {
134 syscallarg(int) pid;
135 syscallarg(int *) status;
136 syscallarg(int) options;
137 syscallarg(struct rusage50 *) rusage;
138 } */
139 int status, error, pid = SCARG(uap, pid);
140 struct rusage50 ru50;
141 struct rusage ru;
142
143 error = do_sys_wait(&pid, &status, SCARG(uap, options),
144 SCARG(uap, rusage) != NULL ? &ru : NULL);
145
146 retval[0] = pid;
147 if (pid == 0)
148 return error;
149
150 if (SCARG(uap, rusage)) {
151 rusage_to_rusage50(&ru, &ru50);
152 error = copyout(&ru50, SCARG(uap, rusage), sizeof(ru50));
153 }
154
155 if (error == 0 && SCARG(uap, status))
156 error = copyout(&status, SCARG(uap, status), sizeof(status));
157
158 return error;
159 }
160
161 int
kern_50_init(void)162 kern_50_init(void)
163 {
164
165 return syscall_establish(NULL, kern_50_syscalls);
166 }
167
168 int
kern_50_fini(void)169 kern_50_fini(void)
170 {
171
172 return syscall_disestablish(NULL, kern_50_syscalls);
173 }
174