1 /* 2 * Created by: Jason Wessel <jason.wessel@windriver.com> 3 * 4 * Copyright (c) 2010 Wind River Systems, Inc. All Rights Reserved. 5 * 6 * This file is licensed under the terms of the GNU General Public 7 * License version 2. This program is licensed "as is" without any 8 * warranty of any kind, whether express or implied. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/kdb.h> 13 14 /* 15 * All kdb shell command call backs receive argc and argv, where 16 * argv[0] is the command the end user typed 17 */ 18 static int kdb_hello_cmd(int argc, const char **argv) 19 { 20 if (argc > 1) 21 return KDB_ARGCOUNT; 22 23 if (argc) 24 kdb_printf("Hello %s.\n", argv[1]); 25 else 26 kdb_printf("Hello world!\n"); 27 28 return 0; 29 } 30 31 static kdbtab_t hello_cmd = { 32 .name = "hello", 33 .func = kdb_hello_cmd, 34 .usage = "[string]", 35 .help = "Say Hello World or Hello [string]", 36 }; 37 38 static int __init kdb_hello_cmd_init(void) 39 { 40 /* 41 * Registration of a dynamically added kdb command is done with 42 * kdb_register(). 43 */ 44 kdb_register(&hello_cmd); 45 return 0; 46 } 47 48 static void __exit kdb_hello_cmd_exit(void) 49 { 50 kdb_unregister(&hello_cmd); 51 } 52 53 module_init(kdb_hello_cmd_init); 54 module_exit(kdb_hello_cmd_exit); 55 56 MODULE_AUTHOR("WindRiver"); 57 MODULE_DESCRIPTION("KDB example to add a hello command"); 58 MODULE_LICENSE("GPL"); 59