1 #ifndef _LTTNG_WRAPPER_FTRACE_H
2 #define _LTTNG_WRAPPER_FTRACE_H
7 * wrapper around vmalloc_sync_all. Using KALLSYMS to get its address when
8 * available, else we need to have a kernel that exports this function to GPL
11 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
13 * This library is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; only
16 * version 2.1 of the License.
18 * This library is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with this library; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include <linux/ftrace.h>
30 #ifdef CONFIG_KALLSYMS
32 #include <linux/kallsyms.h>
36 int wrapper_register_ftrace_function_probe(char *glob,
37 struct ftrace_probe_ops *ops, void *data)
39 int (*register_ftrace_function_probe_sym)(char *glob,
40 struct ftrace_probe_ops *ops, void *data);
42 register_ftrace_function_probe_sym = (void *) kallsyms_lookup_funcptr("register_ftrace_function_probe");
43 if (register_ftrace_function_probe_sym) {
44 return register_ftrace_function_probe_sym(glob, ops, data);
46 printk(KERN_WARNING "LTTng: register_ftrace_function_probe symbol lookup failed.\n");
52 void wrapper_unregister_ftrace_function_probe(char *glob,
53 struct ftrace_probe_ops *ops, void *data)
55 void (*unregister_ftrace_function_probe_sym)(char *glob,
56 struct ftrace_probe_ops *ops, void *data);
58 unregister_ftrace_function_probe_sym = (void *) kallsyms_lookup_funcptr("unregister_ftrace_function_probe");
59 if (unregister_ftrace_function_probe_sym) {
60 unregister_ftrace_function_probe_sym(glob, ops, data);
62 printk(KERN_WARNING "LTTng: unregister_ftrace_function_probe symbol lookup failed.\n");
70 int wrapper_register_ftrace_function_probe(char *glob,
71 struct ftrace_probe_ops *ops, void *data)
73 return register_ftrace_function_probe(glob, ops, data);
77 void wrapper_unregister_ftrace_function_probe(char *glob,
78 struct ftrace_probe_ops *ops, void *data)
80 return unregister_ftrace_function_probe(glob, ops, data);
84 #endif /* _LTTNG_WRAPPER_FTRACE_H */