1 /* $NetBSD: netbsd32_sem.c,v 1.11 2014/09/19 17:25:33 matt Exp $ */
2
3 /*
4 * Copyright (c) 2006 The NetBSD Foundation.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: netbsd32_sem.c,v 1.11 2014/09/19 17:25:33 matt Exp $");
31
32 #include <sys/types.h>
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/dirent.h>
37 #include <sys/condvar.h>
38 #include <sys/ksem.h>
39 #include <sys/mount.h>
40 #include <sys/proc.h>
41 #include <sys/syscallargs.h>
42
43 #include <compat/netbsd32/netbsd32.h>
44 #include <compat/netbsd32/netbsd32_syscallargs.h>
45 #include <compat/netbsd32/netbsd32_conv.h>
46
47 static int
netbsd32_ksem_copyout(const void * src,void * dst,size_t size)48 netbsd32_ksem_copyout(const void *src, void *dst, size_t size)
49 {
50 const intptr_t *idp = src;
51 netbsd32_intptr_t id32, *outidp = dst;
52
53 KASSERT(size == sizeof(intptr_t));
54
55 /* Returning a kernel pointer to userspace sucks badly :-( */
56 id32 = (netbsd32_intptr_t)*idp;
57 return copyout(&id32, outidp, sizeof(id32));
58 }
59
60 int
netbsd32__ksem_init(struct lwp * l,const struct netbsd32__ksem_init_args * uap,register_t * retval)61 netbsd32__ksem_init(struct lwp *l, const struct netbsd32__ksem_init_args *uap, register_t *retval)
62 {
63 /* {
64 syscallarg(unsigned int) value;
65 syscallarg(netbsd32_semidp_t) idp;
66 } */
67
68 return do_ksem_init(l, SCARG(uap, value),
69 SCARG_P32(uap, idp), netbsd32_ksem_copyout);
70 }
71
72 int
netbsd32__ksem_open(struct lwp * l,const struct netbsd32__ksem_open_args * uap,register_t * retval)73 netbsd32__ksem_open(struct lwp *l, const struct netbsd32__ksem_open_args *uap, register_t *retval)
74 {
75 /* {
76 syscallarg(const netbsd32_charp) name;
77 syscallarg(int) oflag;
78 syscallarg(mode_t) mode;
79 syscallarg(unsigned int) value;
80 syscallarg(netbsd32_semidp_t) idp;
81 } */
82
83 return do_ksem_open(l, SCARG_P32(uap, name),
84 SCARG(uap, oflag), SCARG(uap, mode), SCARG(uap, value),
85 SCARG_P32(uap, idp), netbsd32_ksem_copyout);
86 }
87
88 int
netbsd32__ksem_unlink(struct lwp * l,const struct netbsd32__ksem_unlink_args * uap,register_t * retval)89 netbsd32__ksem_unlink(struct lwp *l, const struct netbsd32__ksem_unlink_args *uap, register_t *retval)
90 {
91 /* {
92 syscallarg(const netbsd32_charp) name;
93 } */
94 struct sys__ksem_unlink_args ua;
95
96 NETBSD32TOP_UAP(name, const char);
97 return sys__ksem_unlink(l, &ua, retval);
98 }
99
100 int
netbsd32__ksem_close(struct lwp * l,const struct netbsd32__ksem_close_args * uap,register_t * retval)101 netbsd32__ksem_close(struct lwp *l, const struct netbsd32__ksem_close_args *uap, register_t *retval)
102 {
103 /* {
104 syscallarg(netbsd32_intptr_t) id;
105 } */
106 struct sys__ksem_close_args ua;
107
108 NETBSD32TOX_UAP(id, intptr_t);
109 return sys__ksem_close(l, &ua, retval);
110 }
111
112 int
netbsd32__ksem_post(struct lwp * l,const struct netbsd32__ksem_post_args * uap,register_t * retval)113 netbsd32__ksem_post(struct lwp *l, const struct netbsd32__ksem_post_args *uap, register_t *retval)
114 {
115 /* {
116 syscallarg(netbsd32_intptr_t) id;
117 } */
118 struct sys__ksem_post_args ua;
119
120 NETBSD32TOX_UAP(id, intptr_t);
121 return sys__ksem_post(l, &ua, retval);
122 }
123
124 int
netbsd32__ksem_wait(struct lwp * l,const struct netbsd32__ksem_wait_args * uap,register_t * retval)125 netbsd32__ksem_wait(struct lwp *l, const struct netbsd32__ksem_wait_args *uap, register_t *retval)
126 {
127 /* {
128 syscallarg(netbsd32_intptr_t) id;
129 } */
130
131 return do_ksem_wait(l, SCARG(uap, id), false, NULL);
132 }
133
134 int
netbsd32__ksem_trywait(struct lwp * l,const struct netbsd32__ksem_trywait_args * uap,register_t * retval)135 netbsd32__ksem_trywait(struct lwp *l, const struct netbsd32__ksem_trywait_args *uap, register_t *retval)
136 {
137 /* {
138 syscallarg(netbsd32_intptr_t) id;
139 } */
140
141 return do_ksem_wait(l, SCARG(uap, id), true, NULL);
142 }
143
144 int
netbsd32__ksem_timedwait(struct lwp * l,const struct netbsd32__ksem_timedwait_args * uap,register_t * retval)145 netbsd32__ksem_timedwait(struct lwp *l, const struct netbsd32__ksem_timedwait_args *uap,
146 register_t *retval)
147 {
148 /* {
149 intptr_t id;
150 const netbsd32_timespecp_t abstime;
151 } */
152 struct netbsd32_timespec ts32;
153 struct timespec ts;
154 intptr_t id;
155 int error;
156
157 id = SCARG(uap, id);
158
159 error = copyin(SCARG_P32(uap, abstime), &ts32, sizeof(ts32));
160 if (error != 0)
161 return error;
162 netbsd32_to_timespec(&ts32, &ts);
163
164 if (ts.tv_sec < 0 || ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
165 return EINVAL;
166
167 error = do_ksem_wait(l, id, false, &ts);
168 if (error == EWOULDBLOCK)
169 error = ETIMEDOUT;
170 return error;
171 }
172
173 int
netbsd32__ksem_destroy(struct lwp * l,const struct netbsd32__ksem_destroy_args * uap,register_t * retval)174 netbsd32__ksem_destroy(struct lwp *l, const struct netbsd32__ksem_destroy_args *uap, register_t *retval)
175 {
176 /* {
177 syscallarg(netbsd32_intptr_t) id;
178 } */
179 struct sys__ksem_destroy_args ua;
180
181 NETBSD32TOX_UAP(id, intptr_t);
182 return sys__ksem_destroy(l, &ua, retval);
183 }
184
185 int
netbsd32__ksem_getvalue(struct lwp * l,const struct netbsd32__ksem_getvalue_args * uap,register_t * retval)186 netbsd32__ksem_getvalue(struct lwp *l, const struct netbsd32__ksem_getvalue_args *uap, register_t *retval)
187 {
188 /* {
189 syscallarg(netbsd32_intptr_t) id;
190 syscallarg(netbsd32_intp) value;
191 } */
192 struct sys__ksem_getvalue_args ua;
193
194 NETBSD32TOX_UAP(id, intptr_t);
195 NETBSD32TOP_UAP(value, unsigned int);
196 return sys__ksem_getvalue(l, &ua, retval);
197 }
198