1 /* $NetBSD: netbsd32_module.c,v 1.2 2015/06/21 06:51:05 msaitoh 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 1.2 2015/06/21 06:51:05 msaitoh 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 int 46 netbsd32_modctl(struct lwp *lwp, const struct netbsd32_modctl_args *uap, 47 register_t *result) 48 { 49 /* { 50 syscallarg(int) cmd; 51 syscallarg(netbsd32_voidp) arg; 52 } */ 53 char buf[MAXMODNAME]; 54 size_t mslen; 55 module_t *mod; 56 modinfo_t *mi; 57 modstat_t *ms, *mso; 58 vaddr_t addr; 59 size_t size; 60 struct netbsd32_iovec iov; 61 struct netbsd32_modctl_load ml; 62 int error; 63 void *arg; 64 #ifdef MODULAR 65 uintptr_t loadtype; 66 #endif 67 68 arg = SCARG_P32(uap, arg); 69 70 switch (SCARG(uap, cmd)) { 71 case MODCTL_LOAD: 72 error = copyin(arg, &ml, sizeof(ml)); 73 if (error != 0) 74 break; 75 error = handle_modctl_load(NETBSD32PTR64(ml.ml_filename), 76 ml.ml_flags, NETBSD32PTR64(ml.ml_props), ml.ml_propslen); 77 break; 78 79 case MODCTL_UNLOAD: 80 error = copyinstr(arg, buf, sizeof(buf), NULL); 81 if (error == 0) { 82 error = module_unload(buf); 83 } 84 break; 85 86 case MODCTL_STAT: 87 error = copyin(arg, &iov, sizeof(iov)); 88 if (error != 0) { 89 break; 90 } 91 kernconfig_lock(); 92 mslen = (module_count+module_builtinlist+1) * sizeof(modstat_t); 93 mso = kmem_zalloc(mslen, KM_SLEEP); 94 if (mso == NULL) { 95 kernconfig_unlock(); 96 return ENOMEM; 97 } 98 ms = mso; 99 TAILQ_FOREACH(mod, &module_list, mod_chain) { 100 mi = mod->mod_info; 101 strlcpy(ms->ms_name, mi->mi_name, sizeof(ms->ms_name)); 102 if (mi->mi_required != NULL) { 103 strlcpy(ms->ms_required, mi->mi_required, 104 sizeof(ms->ms_required)); 105 } 106 if (mod->mod_kobj != NULL) { 107 kobj_stat(mod->mod_kobj, &addr, &size); 108 ms->ms_addr = addr; 109 ms->ms_size = size; 110 } 111 ms->ms_class = mi->mi_class; 112 ms->ms_refcnt = mod->mod_refcnt; 113 ms->ms_source = mod->mod_source; 114 ms++; 115 } 116 TAILQ_FOREACH(mod, &module_builtins, mod_chain) { 117 mi = mod->mod_info; 118 strlcpy(ms->ms_name, mi->mi_name, sizeof(ms->ms_name)); 119 if (mi->mi_required != NULL) { 120 strlcpy(ms->ms_required, mi->mi_required, 121 sizeof(ms->ms_required)); 122 } 123 if (mod->mod_kobj != NULL) { 124 kobj_stat(mod->mod_kobj, &addr, &size); 125 ms->ms_addr = addr; 126 ms->ms_size = size; 127 } 128 ms->ms_class = mi->mi_class; 129 ms->ms_refcnt = -1; 130 KASSERT(mod->mod_source == MODULE_SOURCE_KERNEL); 131 ms->ms_source = mod->mod_source; 132 ms++; 133 } 134 kernconfig_unlock(); 135 error = copyout(mso, NETBSD32PTR64(iov.iov_base), 136 min(mslen - sizeof(modstat_t), iov.iov_len)); 137 kmem_free(mso, mslen); 138 if (error == 0) { 139 iov.iov_len = mslen - sizeof(modstat_t); 140 error = copyout(&iov, arg, sizeof(iov)); 141 } 142 break; 143 144 case MODCTL_EXISTS: 145 #ifndef MODULAR 146 error = ENOSYS; 147 #else 148 loadtype = (uintptr_t)arg; 149 switch (loadtype) { /* 0 = modload, 1 = autoload */ 150 case 0: /* FALLTHROUGH */ 151 case 1: 152 error = kauth_authorize_system(kauth_cred_get(), 153 KAUTH_SYSTEM_MODULE, 0, 154 (void *)(uintptr_t)MODCTL_LOAD, 155 (void *)loadtype, NULL); 156 break; 157 158 default: 159 error = EINVAL; 160 break; 161 } 162 #endif 163 break; 164 165 default: 166 error = EINVAL; 167 break; 168 } 169 170 return error; 171 } 172 173 174