1 /* $NetBSD: freebsd_misc.c,v 1.34 2021/09/07 11:43:03 riastradh Exp $ */
2
3 /*
4 * Copyright (c) 1995 Frank van der Linden
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 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed for the NetBSD Project
18 * by Frank van der Linden
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * FreeBSD compatibility module. Try to deal with various FreeBSD system calls.
36 */
37
38 #include <sys/cdefs.h>
39 __KERNEL_RCSID(0, "$NetBSD: freebsd_misc.c,v 1.34 2021/09/07 11:43:03 riastradh Exp $");
40
41 #if defined(_KERNEL_OPT)
42 #include "opt_ntp.h"
43 #endif
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/proc.h>
48 #include <sys/mount.h>
49 #include <sys/signal.h>
50 #include <sys/signalvar.h>
51 #include <sys/mman.h>
52 #include <sys/ktrace.h>
53
54 #include <sys/syscallargs.h>
55
56 #include <compat/freebsd/freebsd_syscallargs.h>
57 #include <compat/common/compat_util.h>
58 #include <compat/freebsd/freebsd_rtprio.h>
59 #include <compat/freebsd/freebsd_timex.h>
60 #include <compat/freebsd/freebsd_signal.h>
61 #include <compat/freebsd/freebsd_mman.h>
62
63 int
freebsd_sys_msync(struct lwp * l,const struct freebsd_sys_msync_args * uap,register_t * retval)64 freebsd_sys_msync(struct lwp *l, const struct freebsd_sys_msync_args *uap, register_t *retval)
65 {
66 /* {
67 syscallarg(void *) addr;
68 syscallarg(size_t) len;
69 syscallarg(int) flags;
70 } */
71 struct sys___msync13_args bma;
72
73 /*
74 * FreeBSD-2.0-RELEASE's msync(2) is compatible with NetBSD's.
75 * FreeBSD-2.0.5-RELEASE's msync(2) has addtional argument `flags',
76 * but syscall number is not changed. :-<
77 */
78 SCARG(&bma, addr) = SCARG(uap, addr);
79 SCARG(&bma, len) = SCARG(uap, len);
80 SCARG(&bma, flags) = SCARG(uap, flags);
81 return sys___msync13(l, &bma, retval);
82 }
83
84 int
freebsd_sys_mmap(struct lwp * l,const struct freebsd_sys_mmap_args * uap,register_t * retval)85 freebsd_sys_mmap(struct lwp *l, const struct freebsd_sys_mmap_args *uap, register_t *retval)
86 {
87 /* {
88 syscallarg(void *) addr;
89 syscallarg(size_t) len;
90 syscallarg(int) prot;
91 syscallarg(int) flags;
92 syscallarg(int) fd;
93 syscallarg(long) pad;
94 syscallarg(off_t) pos;
95 } */
96 struct sys_mmap_args bma;
97 int flags, prot, fd;
98 off_t pos;
99
100 prot = SCARG(uap, prot);
101 flags = SCARG(uap, flags);
102 fd = SCARG(uap, fd);
103 pos = SCARG(uap, pos);
104
105 /*
106 * If using MAP_STACK on FreeBSD:
107 *
108 * + fd has to be -1
109 * + prot must have read and write
110 * + MAP_STACK implies MAP_ANON
111 * + MAP_STACK implies offset of 0
112 */
113 if (flags & FREEBSD_MAP_STACK) {
114 if ((fd != -1)
115 ||((prot & (PROT_READ|PROT_WRITE))!=(PROT_READ|PROT_WRITE)))
116 return (EINVAL);
117
118 flags |= (MAP_ANON | MAP_FIXED);
119 flags &= ~FREEBSD_MAP_STACK;
120
121 pos = 0;
122 }
123
124 SCARG(&bma, addr) = SCARG(uap, addr);
125 SCARG(&bma, len) = SCARG(uap, len);
126 SCARG(&bma, prot) = prot;
127 SCARG(&bma, flags) = flags;
128 SCARG(&bma, fd) = fd;
129 SCARG(&bma, pos) = pos;
130
131 return sys_mmap(l, &bma, retval);
132 }
133
134 /* just a place holder */
135
136 int
freebsd_sys_rtprio(struct lwp * l,const struct freebsd_sys_rtprio_args * uap,register_t * retval)137 freebsd_sys_rtprio(struct lwp *l, const struct freebsd_sys_rtprio_args *uap, register_t *retval)
138 {
139 /* {
140 syscallarg(int) function;
141 syscallarg(pid_t) pid;
142 syscallarg(struct freebsd_rtprio *) rtp;
143 } */
144
145 return ENOSYS; /* XXX */
146 }
147
148 #ifdef NTP
149 int
freebsd_ntp_adjtime(struct lwp * l,const struct freebsd_ntp_adjtime_args * uap,register_t * retval)150 freebsd_ntp_adjtime(struct lwp *l, const struct freebsd_ntp_adjtime_args *uap, register_t *retval)
151 {
152 /* {
153 syscallarg(struct freebsd_timex *) tp;
154 } */
155
156 return ENOSYS; /* XXX */
157 }
158 #endif
159
160 int
freebsd_sys_sigaction4(struct lwp * l,const struct freebsd_sys_sigaction4_args * uap,register_t * retval)161 freebsd_sys_sigaction4(struct lwp *l, const struct freebsd_sys_sigaction4_args *uap, register_t *retval)
162 {
163 /* {
164 syscallarg(int) signum;
165 syscallarg(const struct freebsd_sigaction4 *) nsa;
166 syscallarg(struct freebsd_sigaction4 *) osa;
167 } */
168 struct freebsd_sigaction4 nesa, oesa;
169 struct sigaction nbsa, obsa;
170 int error;
171
172 if (SCARG(uap, nsa)) {
173 error = copyin(SCARG(uap, nsa), &nesa, sizeof(nesa));
174 if (error)
175 return (error);
176 nbsa.sa_handler = nesa.freebsd_sa_handler;
177 nbsa.sa_mask = nesa.freebsd_sa_mask;
178 nbsa.sa_flags = nesa.freebsd_sa_flags;
179 }
180 error = sigaction1(l, SCARG(uap, signum),
181 SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0,
182 NULL, 0);
183 if (error)
184 return (error);
185 if (SCARG(uap, osa)) {
186 memset(&oesa, 0, sizeof(oesa));
187 oesa.freebsd_sa_handler = obsa.sa_handler;
188 oesa.freebsd_sa_mask = obsa.sa_mask;
189 oesa.freebsd_sa_flags = obsa.sa_flags;
190 error = copyout(&oesa, SCARG(uap, osa), sizeof(oesa));
191 if (error)
192 return (error);
193 }
194 return (0);
195 }
196
197 int
freebsd_sys_utrace(struct lwp * l,const struct freebsd_sys_utrace_args * uap,register_t * retval)198 freebsd_sys_utrace(struct lwp *l, const struct freebsd_sys_utrace_args *uap, register_t *retval)
199 {
200 /* {
201 syscallarg(void *) addr;
202 syscallarg(size_t) len;
203 } */
204
205 return ktruser("FreeBSD utrace", SCARG(uap, addr), SCARG(uap, len),
206 0);
207 }
208