1 /* $NetBSD: netbsd32_module.c,v 1.5 2017/06/01 02:45:08 chs 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 1.5 2017/06/01 02:45:08 chs 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 ms = mso; 60 TAILQ_FOREACH(mod, &module_list, mod_chain) { 61 mi = mod->mod_info; 62 strlcpy(ms->ms_name, mi->mi_name, sizeof(ms->ms_name)); 63 if (mi->mi_required != NULL) { 64 strlcpy(ms->ms_required, mi->mi_required, 65 sizeof(ms->ms_required)); 66 } 67 if (mod->mod_kobj != NULL) { 68 kobj_stat(mod->mod_kobj, &addr, &size); 69 ms->ms_addr = addr; 70 ms->ms_size = size; 71 } 72 ms->ms_class = mi->mi_class; 73 ms->ms_refcnt = mod->mod_refcnt; 74 ms->ms_source = mod->mod_source; 75 ms->ms_flags = mod->mod_flags; 76 ms++; 77 } 78 TAILQ_FOREACH(mod, &module_builtins, mod_chain) { 79 mi = mod->mod_info; 80 strlcpy(ms->ms_name, mi->mi_name, sizeof(ms->ms_name)); 81 if (mi->mi_required != NULL) { 82 strlcpy(ms->ms_required, mi->mi_required, 83 sizeof(ms->ms_required)); 84 } 85 if (mod->mod_kobj != NULL) { 86 kobj_stat(mod->mod_kobj, &addr, &size); 87 ms->ms_addr = addr; 88 ms->ms_size = size; 89 } 90 ms->ms_class = mi->mi_class; 91 ms->ms_refcnt = -1; 92 KASSERT(mod->mod_source == MODULE_SOURCE_KERNEL); 93 ms->ms_source = mod->mod_source; 94 ms++; 95 } 96 kernconfig_unlock(); 97 error = copyout(mso, NETBSD32PTR64(iov->iov_base), 98 min(mslen - sizeof(modstat_t), iov->iov_len)); 99 kmem_free(mso, mslen); 100 if (error == 0) { 101 iov->iov_len = mslen - sizeof(modstat_t); 102 error = copyout(iov, arg, sizeof(*iov)); 103 } 104 105 return error; 106 } 107 108 int 109 netbsd32_modctl(struct lwp *lwp, const struct netbsd32_modctl_args *uap, 110 register_t *result) 111 { 112 /* { 113 syscallarg(int) cmd; 114 syscallarg(netbsd32_voidp) arg; 115 } */ 116 char buf[MAXMODNAME]; 117 struct netbsd32_iovec iov; 118 struct netbsd32_modctl_load ml; 119 int error; 120 void *arg; 121 #ifdef MODULAR 122 uintptr_t loadtype; 123 #endif 124 125 arg = SCARG_P32(uap, arg); 126 127 switch (SCARG(uap, cmd)) { 128 case MODCTL_LOAD: 129 error = copyin(arg, &ml, sizeof(ml)); 130 if (error != 0) 131 break; 132 error = handle_modctl_load(NETBSD32PTR64(ml.ml_filename), 133 ml.ml_flags, NETBSD32PTR64(ml.ml_props), ml.ml_propslen); 134 break; 135 136 case MODCTL_UNLOAD: 137 error = copyinstr(arg, buf, sizeof(buf), NULL); 138 if (error == 0) { 139 error = module_unload(buf); 140 } 141 break; 142 143 case MODCTL_STAT: 144 error = copyin(arg, &iov, sizeof(iov)); 145 if (error != 0) { 146 break; 147 } 148 error = modctl32_handle_stat(&iov, arg); 149 break; 150 151 case MODCTL_EXISTS: 152 #ifndef MODULAR 153 error = ENOSYS; 154 #else 155 loadtype = (uintptr_t)arg; 156 switch (loadtype) { /* 0 = modload, 1 = autoload */ 157 case 0: /* FALLTHROUGH */ 158 case 1: 159 error = kauth_authorize_system(kauth_cred_get(), 160 KAUTH_SYSTEM_MODULE, 0, 161 (void *)(uintptr_t)MODCTL_LOAD, 162 (void *)loadtype, NULL); 163 break; 164 165 default: 166 error = EINVAL; 167 break; 168 } 169 #endif 170 break; 171 172 default: 173 error = EINVAL; 174 break; 175 } 176 177 return error; 178 } 179