1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * Tracking of kernel module loads and unloads 31 */ 32 33 #include <kmdb/kmdb_kdi.h> 34 #include <kmdb/kctl/kctl.h> 35 #include <sys/kobj.h> 36 #include <sys/kobj_impl.h> 37 #include <sys/ctf_api.h> 38 39 static kobj_notify_list_t kctl_mod_notifiers[] = { 40 { kctl_mod_changed, KOBJ_NOTIFY_MODLOADED }, 41 { kctl_mod_changed, KOBJ_NOTIFY_MODUNLOADING }, 42 { NULL, 0 } 43 }; 44 45 int 46 kctl_mod_decompress(struct modctl *modp) 47 { 48 ctf_file_t *fp; 49 struct module *mp = modp->mod_mp; 50 int rc; 51 52 if ((kmdb_kdi_get_flags() & KMDB_KDI_FL_NOCTF) || mp->ctfdata == NULL) 53 return (0); 54 55 if ((fp = ctf_modopen(mp, &rc)) == NULL) 56 return (rc); 57 58 ctf_close(fp); 59 60 return (0); 61 } 62 63 void 64 kctl_mod_loaded(struct modctl *modp) 65 { 66 int rc; 67 68 mutex_enter(&mod_lock); 69 if (modp->mod_mp == NULL) { 70 mutex_exit(&mod_lock); 71 return; 72 } 73 74 if ((rc = kctl_mod_decompress(modp)) != 0) { 75 cmn_err(CE_WARN, "failed to decompress CTF data for %s: %s\n", 76 modp->mod_modname, ctf_errmsg(rc)); 77 } 78 mutex_exit(&mod_lock); 79 80 if (!(kmdb_kdi_get_flags() & KMDB_KDI_FL_NOMODS)) 81 kctl_dmod_autoload(modp->mod_modname); 82 } 83 84 /*ARGSUSED*/ 85 void 86 kctl_mod_changed(uint_t why, struct modctl *what) 87 { 88 if (why == KOBJ_NOTIFY_MODLOADED) 89 kctl_mod_loaded(what); 90 } 91 92 /* 93 * Tell krtld to notify kmdb when modules have been loaded and unloaded 94 */ 95 void 96 kctl_mod_notify_reg(void) 97 { 98 kobj_notify_list_t *kn; 99 100 for (kn = kctl_mod_notifiers; kn->kn_func != NULL; kn++) 101 kobj_notify_add(kn); 102 } 103 104 void 105 kctl_mod_notify_unreg(void) 106 { 107 kobj_notify_list_t *kn; 108 109 for (kn = kctl_mod_notifiers; kn->kn_func != NULL; kn++) 110 kobj_notify_remove(kn); 111 } 112