1 | /* $NetBSD: netbsd32_module.c,v 1.4 2015/12/19 13:15:21 maxv Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2008 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software developed for The NetBSD Foundation. |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions |
11 | * are met: |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
19 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
20 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
21 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
22 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
28 | * POSSIBILITY OF SUCH DAMAGE. |
29 | */ |
30 | |
31 | #include <sys/cdefs.h> |
32 | __KERNEL_RCSID(0, "$NetBSD: netbsd32_module.c,v 1.4 2015/12/19 13:15:21 maxv Exp $" ); |
33 | |
34 | #include <sys/param.h> |
35 | #include <sys/dirent.h> |
36 | #include <sys/kauth.h> |
37 | #include <sys/module.h> |
38 | #include <sys/kobj.h> |
39 | |
40 | #include <compat/netbsd32/netbsd32.h> |
41 | #include <compat/netbsd32/netbsd32_syscall.h> |
42 | #include <compat/netbsd32/netbsd32_syscallargs.h> |
43 | #include <compat/netbsd32/netbsd32_conv.h> |
44 | |
45 | static int |
46 | modctl32_handle_stat(struct netbsd32_iovec *iov, void *arg) |
47 | { |
48 | modstat_t *ms, *mso; |
49 | modinfo_t *mi; |
50 | module_t *mod; |
51 | vaddr_t addr; |
52 | size_t size; |
53 | size_t mslen; |
54 | int error; |
55 | |
56 | kernconfig_lock(); |
57 | mslen = (module_count+module_builtinlist+1) * sizeof(modstat_t); |
58 | mso = kmem_zalloc(mslen, KM_SLEEP); |
59 | if (mso == NULL) { |
60 | kernconfig_unlock(); |
61 | return ENOMEM; |
62 | } |
63 | ms = mso; |
64 | TAILQ_FOREACH(mod, &module_list, mod_chain) { |
65 | mi = mod->mod_info; |
66 | strlcpy(ms->ms_name, mi->mi_name, sizeof(ms->ms_name)); |
67 | if (mi->mi_required != NULL) { |
68 | strlcpy(ms->ms_required, mi->mi_required, |
69 | sizeof(ms->ms_required)); |
70 | } |
71 | if (mod->mod_kobj != NULL) { |
72 | kobj_stat(mod->mod_kobj, &addr, &size); |
73 | ms->ms_addr = addr; |
74 | ms->ms_size = size; |
75 | } |
76 | ms->ms_class = mi->mi_class; |
77 | ms->ms_refcnt = mod->mod_refcnt; |
78 | ms->ms_source = mod->mod_source; |
79 | ms->ms_flags = mod->mod_flags; |
80 | ms++; |
81 | } |
82 | TAILQ_FOREACH(mod, &module_builtins, mod_chain) { |
83 | mi = mod->mod_info; |
84 | strlcpy(ms->ms_name, mi->mi_name, sizeof(ms->ms_name)); |
85 | if (mi->mi_required != NULL) { |
86 | strlcpy(ms->ms_required, mi->mi_required, |
87 | sizeof(ms->ms_required)); |
88 | } |
89 | if (mod->mod_kobj != NULL) { |
90 | kobj_stat(mod->mod_kobj, &addr, &size); |
91 | ms->ms_addr = addr; |
92 | ms->ms_size = size; |
93 | } |
94 | ms->ms_class = mi->mi_class; |
95 | ms->ms_refcnt = -1; |
96 | KASSERT(mod->mod_source == MODULE_SOURCE_KERNEL); |
97 | ms->ms_source = mod->mod_source; |
98 | ms++; |
99 | } |
100 | kernconfig_unlock(); |
101 | error = copyout(mso, NETBSD32PTR64(iov->iov_base), |
102 | min(mslen - sizeof(modstat_t), iov->iov_len)); |
103 | kmem_free(mso, mslen); |
104 | if (error == 0) { |
105 | iov->iov_len = mslen - sizeof(modstat_t); |
106 | error = copyout(iov, arg, sizeof(*iov)); |
107 | } |
108 | |
109 | return error; |
110 | } |
111 | |
112 | int |
113 | netbsd32_modctl(struct lwp *lwp, const struct netbsd32_modctl_args *uap, |
114 | register_t *result) |
115 | { |
116 | /* { |
117 | syscallarg(int) cmd; |
118 | syscallarg(netbsd32_voidp) arg; |
119 | } */ |
120 | char buf[MAXMODNAME]; |
121 | struct netbsd32_iovec iov; |
122 | struct netbsd32_modctl_load ml; |
123 | int error; |
124 | void *arg; |
125 | #ifdef MODULAR |
126 | uintptr_t loadtype; |
127 | #endif |
128 | |
129 | arg = SCARG_P32(uap, arg); |
130 | |
131 | switch (SCARG(uap, cmd)) { |
132 | case MODCTL_LOAD: |
133 | error = copyin(arg, &ml, sizeof(ml)); |
134 | if (error != 0) |
135 | break; |
136 | error = handle_modctl_load(NETBSD32PTR64(ml.ml_filename), |
137 | ml.ml_flags, NETBSD32PTR64(ml.ml_props), ml.ml_propslen); |
138 | break; |
139 | |
140 | case MODCTL_UNLOAD: |
141 | error = copyinstr(arg, buf, sizeof(buf), NULL); |
142 | if (error == 0) { |
143 | error = module_unload(buf); |
144 | } |
145 | break; |
146 | |
147 | case MODCTL_STAT: |
148 | error = copyin(arg, &iov, sizeof(iov)); |
149 | if (error != 0) { |
150 | break; |
151 | } |
152 | error = modctl32_handle_stat(&iov, arg); |
153 | break; |
154 | |
155 | case MODCTL_EXISTS: |
156 | #ifndef MODULAR |
157 | error = ENOSYS; |
158 | #else |
159 | loadtype = (uintptr_t)arg; |
160 | switch (loadtype) { /* 0 = modload, 1 = autoload */ |
161 | case 0: /* FALLTHROUGH */ |
162 | case 1: |
163 | error = kauth_authorize_system(kauth_cred_get(), |
164 | KAUTH_SYSTEM_MODULE, 0, |
165 | (void *)(uintptr_t)MODCTL_LOAD, |
166 | (void *)loadtype, NULL); |
167 | break; |
168 | |
169 | default: |
170 | error = EINVAL; |
171 | break; |
172 | } |
173 | #endif |
174 | break; |
175 | |
176 | default: |
177 | error = EINVAL; |
178 | break; |
179 | } |
180 | |
181 | return error; |
182 | } |
183 | |
184 | |
185 | |