2 * Dynamic Binary Instrumentation Module based on KProbes
3 * modules/ksyms/ksyms.c
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 * Copyright (C) Samsung Electronics, 2014
21 * 2014 Alexander Aksenov <a.aksenov@samsung.com>
27 #include <linux/kallsyms.h>
28 #include <linux/module.h>
29 #include <linux/percpu.h>
37 static int symbol_cb(void *data, const char *sym, struct module *mod,
40 struct symbol_data *sym_data_p = (struct symbol_data *)data;
42 /* We expect that real symbol name should have at least the same length as
43 * symbol name we are looking for. */
44 if (strncmp(sym_data_p->name, sym, sym_data_p->len) == 0) {
45 sym_data_p->addr = addr;
46 /* Return != 0 to stop loop over the symbols */
53 unsigned long swap_ksyms_substr(const char *name)
55 struct symbol_data sym_data = {
60 kallsyms_on_each_symbol(symbol_cb, (void *)&sym_data);
64 EXPORT_SYMBOL_GPL(swap_ksyms_substr);
66 int __init swap_ksyms_init(void)
68 printk("SWAP_KSYMS: Module initialized\n");
73 void __exit swap_ksyms_exit(void)
75 printk("SWAP_KSYMS: Module uninitialized\n");
78 module_init(swap_ksyms_init);
79 module_exit(swap_ksyms_exit);
81 MODULE_LICENSE("GPL");
82 MODULE_DESCRIPTION("SWAP ksyms module");
83 MODULE_AUTHOR("Vyacheslav Cherkashin <v.cherkashin@samaung.com>");