1 | /* $NetBSD: kern_stub.c,v 1.43 2016/11/02 00:11:59 pgoyette Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc. |
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 | /* |
30 | * Copyright (c) 1982, 1986, 1991, 1993 |
31 | * The Regents of the University of California. All rights reserved. |
32 | * |
33 | * Redistribution and use in source and binary forms, with or without |
34 | * modification, are permitted provided that the following conditions |
35 | * are met: |
36 | * 1. Redistributions of source code must retain the above copyright |
37 | * notice, this list of conditions and the following disclaimer. |
38 | * 2. Redistributions in binary form must reproduce the above copyright |
39 | * notice, this list of conditions and the following disclaimer in the |
40 | * documentation and/or other materials provided with the distribution. |
41 | * 3. Neither the name of the University nor the names of its contributors |
42 | * may be used to endorse or promote products derived from this software |
43 | * without specific prior written permission. |
44 | * |
45 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
46 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
47 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
48 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
49 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
50 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
51 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
52 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
53 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
54 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
55 | * SUCH DAMAGE. |
56 | * |
57 | * @(#)subr_xxx.c 8.3 (Berkeley) 3/29/95 |
58 | */ |
59 | |
60 | /* |
61 | * Stubs for system calls and facilities not included in the system. |
62 | */ |
63 | |
64 | #include <sys/cdefs.h> |
65 | __KERNEL_RCSID(0, "$NetBSD: kern_stub.c,v 1.43 2016/11/02 00:11:59 pgoyette Exp $" ); |
66 | |
67 | #ifdef _KERNEL_OPT |
68 | #include "opt_ktrace.h" |
69 | #endif |
70 | |
71 | #include <sys/param.h> |
72 | #include <sys/kernel.h> |
73 | #include <sys/proc.h> |
74 | #include <sys/fstypes.h> |
75 | #include <sys/signalvar.h> |
76 | #include <sys/syscall.h> |
77 | #include <sys/ktrace.h> |
78 | #include <sys/intr.h> |
79 | #include <sys/cpu.h> |
80 | #include <sys/module.h> |
81 | #include <sys/bus.h> |
82 | #include <sys/userconf.h> |
83 | |
84 | bool default_bus_space_is_equal(bus_space_tag_t, bus_space_tag_t); |
85 | bool default_bus_space_handle_is_equal(bus_space_tag_t, bus_space_handle_t, |
86 | bus_space_handle_t); |
87 | |
88 | /* |
89 | * ktrace stubs. ktruser() goes to enosys as we want to fail the syscall, |
90 | * but not kill the process: utrace() is a debugging feature. |
91 | */ |
92 | #ifndef KTRACE |
93 | __strong_alias(ktr_csw,nullop); /* Probes */ |
94 | __strong_alias(ktr_emul,nullop); |
95 | __strong_alias(ktr_geniov,nullop); |
96 | __strong_alias(ktr_genio,nullop); |
97 | __strong_alias(ktr_mibio,nullop); |
98 | __strong_alias(ktr_namei,nullop); |
99 | __strong_alias(ktr_namei2,nullop); |
100 | __strong_alias(ktr_psig,nullop); |
101 | __strong_alias(ktr_syscall,nullop); |
102 | __strong_alias(ktr_sysret,nullop); |
103 | __strong_alias(ktr_kuser,nullop); |
104 | __strong_alias(ktr_mib,nullop); |
105 | __strong_alias(ktr_execarg,nullop); |
106 | __strong_alias(ktr_execenv,nullop); |
107 | __strong_alias(ktr_execfd,nullop); |
108 | |
109 | __strong_alias(sys_fktrace,sys_nosys); /* Syscalls */ |
110 | __strong_alias(sys_ktrace,sys_nosys); |
111 | __strong_alias(sys_utrace,sys_nosys); |
112 | |
113 | int ktrace_on; /* Misc */ |
114 | __strong_alias(ktruser,enosys); |
115 | __strong_alias(ktr_point,nullop); |
116 | #endif /* KTRACE */ |
117 | |
118 | __weak_alias(device_register, voidop); |
119 | __weak_alias(device_register_post_config, voidop); |
120 | __weak_alias(spldebug_start, voidop); |
121 | __weak_alias(spldebug_stop, voidop); |
122 | __weak_alias(machdep_init,nullop); |
123 | __weak_alias(pci_chipset_tag_create, eopnotsupp); |
124 | __weak_alias(pci_chipset_tag_destroy, voidop); |
125 | __weak_alias(bus_space_reserve, eopnotsupp); |
126 | __weak_alias(bus_space_reserve_subregion, eopnotsupp); |
127 | __weak_alias(bus_space_release, voidop); |
128 | __weak_alias(bus_space_reservation_map, eopnotsupp); |
129 | __weak_alias(bus_space_reservation_unmap, voidop); |
130 | __weak_alias(bus_dma_tag_create, eopnotsupp); |
131 | __weak_alias(bus_dma_tag_destroy, voidop); |
132 | __weak_alias(bus_space_tag_create, eopnotsupp); |
133 | __weak_alias(bus_space_tag_destroy, voidop); |
134 | __strict_weak_alias(bus_space_is_equal, default_bus_space_is_equal); |
135 | __strict_weak_alias(bus_space_handle_is_equal, |
136 | default_bus_space_handle_is_equal); |
137 | __weak_alias(userconf_bootinfo, voidop); |
138 | __weak_alias(userconf_init, voidop); |
139 | __weak_alias(userconf_prompt, voidop); |
140 | |
141 | __weak_alias(kobj_renamespace, nullop); |
142 | |
143 | __weak_alias(interrupt_get_count, nullop); |
144 | __weak_alias(interrupt_get_assigned, voidop); |
145 | __weak_alias(interrupt_get_available, voidop); |
146 | __weak_alias(interrupt_get_devname, voidop); |
147 | __weak_alias(interrupt_construct_intrids, nullret); |
148 | __weak_alias(interrupt_destruct_intrids, voidop); |
149 | __weak_alias(interrupt_distribute, eopnotsupp); |
150 | __weak_alias(interrupt_distribute_handler, eopnotsupp); |
151 | |
152 | /* |
153 | * Scheduler activations system calls. These need to remain until libc's |
154 | * major version is bumped. |
155 | */ |
156 | __strong_alias(sys_sa_register,sys_nosys); |
157 | __strong_alias(sys_sa_stacks,sys_nosys); |
158 | __strong_alias(sys_sa_enable,sys_nosys); |
159 | __strong_alias(sys_sa_setconcurrency,sys_nosys); |
160 | __strong_alias(sys_sa_yield,sys_nosys); |
161 | __strong_alias(sys_sa_preempt,sys_nosys); |
162 | __strong_alias(sys_sa_unblockyield,sys_nosys); |
163 | |
164 | /* |
165 | * Stubs for compat_netbsd32. |
166 | */ |
167 | __strong_alias(dosa_register,sys_nosys); |
168 | __strong_alias(sa_stacks1,sys_nosys); |
169 | |
170 | /* |
171 | * Stubs for architectures that do not support kernel preemption. |
172 | */ |
173 | #ifndef __HAVE_PREEMPTION |
174 | bool |
175 | cpu_kpreempt_enter(uintptr_t where, int s) |
176 | { |
177 | |
178 | return false; |
179 | } |
180 | |
181 | void |
182 | cpu_kpreempt_exit(uintptr_t where) |
183 | { |
184 | |
185 | } |
186 | |
187 | bool |
188 | cpu_kpreempt_disabled(void) |
189 | { |
190 | |
191 | return true; |
192 | } |
193 | #else |
194 | # ifndef MULTIPROCESSOR |
195 | # error __HAVE_PREEMPTION requires MULTIPROCESSOR |
196 | # endif |
197 | #endif /* !__HAVE_PREEMPTION */ |
198 | |
199 | int |
200 | sys_nosys(struct lwp *l, const void *v, register_t *retval) |
201 | { |
202 | |
203 | mutex_enter(proc_lock); |
204 | psignal(l->l_proc, SIGSYS); |
205 | mutex_exit(proc_lock); |
206 | return ENOSYS; |
207 | } |
208 | |
209 | /* |
210 | * Unsupported device function (e.g. writing to read-only device). |
211 | */ |
212 | int |
213 | enodev(void) |
214 | { |
215 | |
216 | return (ENODEV); |
217 | } |
218 | |
219 | /* |
220 | * Unconfigured device function; driver not configured. |
221 | */ |
222 | int |
223 | enxio(void) |
224 | { |
225 | |
226 | return (ENXIO); |
227 | } |
228 | |
229 | /* |
230 | * Unsupported ioctl function. |
231 | */ |
232 | int |
233 | enoioctl(void) |
234 | { |
235 | |
236 | return (ENOTTY); |
237 | } |
238 | |
239 | /* |
240 | * Unsupported system function. |
241 | * This is used for an otherwise-reasonable operation |
242 | * that is not supported by the current system binary. |
243 | */ |
244 | int |
245 | enosys(void) |
246 | { |
247 | |
248 | return (ENOSYS); |
249 | } |
250 | |
251 | /* |
252 | * Return error for operation not supported |
253 | * on a specific object or file type. |
254 | */ |
255 | int |
256 | eopnotsupp(void) |
257 | { |
258 | |
259 | return (EOPNOTSUPP); |
260 | } |
261 | |
262 | /* |
263 | * Generic null operation, void return value. |
264 | */ |
265 | void |
266 | voidop(void) |
267 | { |
268 | } |
269 | |
270 | /* |
271 | * Generic null operation, always returns success. |
272 | */ |
273 | int |
274 | nullop(void *v) |
275 | { |
276 | |
277 | return (0); |
278 | } |
279 | |
280 | /* |
281 | * Generic null operation, always returns null. |
282 | */ |
283 | void * |
284 | nullret(void) |
285 | { |
286 | |
287 | return (NULL); |
288 | } |
289 | |
290 | bool |
291 | default_bus_space_handle_is_equal(bus_space_tag_t t, |
292 | bus_space_handle_t h1, bus_space_handle_t h2) |
293 | { |
294 | |
295 | return memcmp(&h1, &h2, sizeof(h1)) == 0; |
296 | } |
297 | |
298 | bool |
299 | default_bus_space_is_equal(bus_space_tag_t t1, bus_space_tag_t t2) |
300 | { |
301 | |
302 | return memcmp(&t1, &t2, sizeof(t1)) == 0; |
303 | } |
304 | |