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