netbsd32_sem.c revision 1.10 
1/*	$NetBSD: netbsd32_sem.c,v 1.10 2012/03/10 21:51:58 joerg 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 1.10 2012/03/10 21:51:58 joerg 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/ksem.h>
38#include <sys/mount.h>
39#include <sys/proc.h>
40#include <sys/syscallargs.h>
41
42#include <compat/netbsd32/netbsd32.h>
43#include <compat/netbsd32/netbsd32_syscallargs.h>
44#include <compat/netbsd32/netbsd32_conv.h>
45
46static int
47netbsd32_ksem_copyout(const void *src, void *dst, size_t size)
48{
49	const intptr_t *idp = src;
50	netbsd32_intptr_t id32, *outidp = dst;
51
52	KASSERT(size == sizeof(intptr_t));
53
54	/* Returning a kernel pointer to userspace sucks badly :-( */
55	id32 = (netbsd32_intptr_t)*idp;
56	return copyout(&id32, outidp, sizeof(id32));
57}
58
59int
60netbsd32__ksem_init(struct lwp *l, const struct netbsd32__ksem_init_args *uap, register_t *retval)
61{
62	/* {
63		syscallarg(unsigned int) value;
64		syscallarg(netbsd32_semidp_t) idp;
65	} */
66
67	return do_ksem_init(l, SCARG(uap, value),
68	    SCARG_P32(uap, idp), netbsd32_ksem_copyout);
69}
70
71int
72netbsd32__ksem_open(struct lwp *l, const struct netbsd32__ksem_open_args *uap, register_t *retval)
73{
74	/* {
75		syscallarg(const netbsd32_charp) name;
76		syscallarg(int) oflag;
77		syscallarg(mode_t) mode;
78		syscallarg(unsigned int) value;
79		syscallarg(netbsd32_semidp_t) idp;
80	} */
81
82	return do_ksem_open(l, SCARG_P32(uap, name),
83	    SCARG(uap, oflag), SCARG(uap, mode), SCARG(uap, value),
84	    SCARG_P32(uap, idp), netbsd32_ksem_copyout);
85}
86
87int
88netbsd32__ksem_unlink(struct lwp *l, const struct netbsd32__ksem_unlink_args *uap, register_t *retval)
89{
90	/* {
91		syscallarg(const netbsd32_charp) name;
92	} */
93	struct sys__ksem_unlink_args ua;
94
95	NETBSD32TOP_UAP(name, const char);
96	return sys__ksem_unlink(l, &ua, retval);
97}
98
99int
100netbsd32__ksem_close(struct lwp *l, const struct netbsd32__ksem_close_args *uap, register_t *retval)
101{
102	/* {
103		syscallarg(netbsd32_intptr_t) id;
104	} */
105	struct sys__ksem_close_args ua;
106
107	NETBSD32TOX_UAP(id, intptr_t);
108	return sys__ksem_close(l, &ua, retval);
109}
110
111int
112netbsd32__ksem_post(struct lwp *l, const struct netbsd32__ksem_post_args *uap, register_t *retval)
113{
114	/* {
115		syscallarg(netbsd32_intptr_t) id;
116	} */
117	struct sys__ksem_post_args ua;
118
119	NETBSD32TOX_UAP(id, intptr_t);
120	return sys__ksem_post(l, &ua, retval);
121}
122
123int
124netbsd32__ksem_wait(struct lwp *l, const struct netbsd32__ksem_wait_args *uap, register_t *retval)
125{
126	/* {
127		syscallarg(netbsd32_intptr_t) id;
128	} */
129
130	return do_ksem_wait(l, SCARG(uap, id), false, NULL);
131}
132
133int
134netbsd32__ksem_trywait(struct lwp *l, const struct netbsd32__ksem_trywait_args *uap, register_t *retval)
135{
136	/* {
137		syscallarg(netbsd32_intptr_t) id;
138	} */
139
140	return do_ksem_wait(l, SCARG(uap, id), true, NULL);
141}
142
143int
144netbsd32__ksem_timedwait(struct lwp *l, const struct netbsd32__ksem_timedwait_args *uap,
145    register_t *retval)
146{
147	/* {
148		intptr_t id;
149		const netbsd32_timespecp_t abstime;
150	} */
151	struct netbsd32_timespec ts32;
152	struct timespec ts;
153	intptr_t id;
154	int error;
155
156	id = SCARG(uap, id);
157
158	error = copyin(SCARG_P32(uap, abstime), &ts32, sizeof(ts32));
159	if (error != 0)
160		return error;
161	netbsd32_to_timespec(&ts32, &ts);
162
163	if (ts.tv_sec < 0 || ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
164		return EINVAL;
165
166	error = do_ksem_wait(l, id, false, &ts);
167	if (error == EWOULDBLOCK)
168		error = ETIMEDOUT;
169	return error;
170}
171
172int
173netbsd32__ksem_destroy(struct lwp *l, const struct netbsd32__ksem_destroy_args *uap, register_t *retval)
174{
175	/* {
176		syscallarg(netbsd32_intptr_t) id;
177	} */
178	struct sys__ksem_destroy_args ua;
179
180	NETBSD32TOX_UAP(id, intptr_t);
181	return sys__ksem_destroy(l, &ua, retval);
182}
183
184int
185netbsd32__ksem_getvalue(struct lwp *l, const struct netbsd32__ksem_getvalue_args *uap, register_t *retval)
186{
187	/* {
188		syscallarg(netbsd32_intptr_t) id;
189		syscallarg(netbsd32_intp) value;
190	} */
191	struct sys__ksem_getvalue_args ua;
192
193	NETBSD32TOX_UAP(id, intptr_t);
194	NETBSD32TOP_UAP(value, unsigned int);
195	return sys__ksem_getvalue(l, &ua, retval);
196}
197