projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| a90917c3 MD |
1 | #ifndef _LTTNG_WRAPPER_FTRACE_H |
| 2 | #define _LTTNG_WRAPPER_FTRACE_H | |
| 5a9479dc MD |
3 | |
| 4 | /* | |
| 886d51a3 | 5 | * wrapper/ftrace.h |
| 5a9479dc MD |
6 | * |
| 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 | |
| 9 | * modules. | |
| 10 | * | |
| 886d51a3 MD |
11 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 12 | * | |
| 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. | |
| 17 | * | |
| 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. | |
| 22 | * | |
| 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 | |
| 5a9479dc MD |
26 | */ |
| 27 | ||
| 28 | #include <linux/ftrace.h> | |
| 29 | ||
| 30 | #ifdef CONFIG_KALLSYMS | |
| 31 | ||
| 32 | #include <linux/kallsyms.h> | |
| c539a324 | 33 | #include "kallsyms.h" |
| 5a9479dc MD |
34 | |
| 35 | static inline | |
| 36 | int wrapper_register_ftrace_function_probe(char *glob, | |
| 37 | struct ftrace_probe_ops *ops, void *data) | |
| 38 | { | |
| 39 | int (*register_ftrace_function_probe_sym)(char *glob, | |
| 40 | struct ftrace_probe_ops *ops, void *data); | |
| 41 | ||
| c539a324 | 42 | register_ftrace_function_probe_sym = (void *) kallsyms_lookup_funcptr("register_ftrace_function_probe"); |
| 5a9479dc MD |
43 | if (register_ftrace_function_probe_sym) { |
| 44 | return register_ftrace_function_probe_sym(glob, ops, data); | |
| 45 | } else { | |
| 46 | printk(KERN_WARNING "LTTng: register_ftrace_function_probe symbol lookup failed.\n"); | |
| 47 | return -EINVAL; | |
| 48 | } | |
| 49 | } | |
| 50 | ||
| 51 | static inline | |
| 52 | void wrapper_unregister_ftrace_function_probe(char *glob, | |
| 53 | struct ftrace_probe_ops *ops, void *data) | |
| 54 | { | |
| 55 | void (*unregister_ftrace_function_probe_sym)(char *glob, | |
| 56 | struct ftrace_probe_ops *ops, void *data); | |
| 57 | ||
| c539a324 | 58 | unregister_ftrace_function_probe_sym = (void *) kallsyms_lookup_funcptr("unregister_ftrace_function_probe"); |
| 5a9479dc MD |
59 | if (unregister_ftrace_function_probe_sym) { |
| 60 | unregister_ftrace_function_probe_sym(glob, ops, data); | |
| 61 | } else { | |
| 62 | printk(KERN_WARNING "LTTng: unregister_ftrace_function_probe symbol lookup failed.\n"); | |
| 63 | WARN_ON(1); | |
| 64 | } | |
| 65 | } | |
| 66 | ||
| 67 | #else | |
| 68 | ||
| 69 | static inline | |
| 70 | int wrapper_register_ftrace_function_probe(char *glob, | |
| c4c357a4 | 71 | struct ftrace_probe_ops *ops, void *data) |
| 5a9479dc | 72 | { |
| 9fe47d18 | 73 | return register_ftrace_function_probe(glob, ops, data); |
| 5a9479dc MD |
74 | } |
| 75 | ||
| 76 | static inline | |
| 77 | void wrapper_unregister_ftrace_function_probe(char *glob, | |
| c4c357a4 | 78 | struct ftrace_probe_ops *ops, void *data) |
| 5a9479dc | 79 | { |
| 9fe47d18 | 80 | return unregister_ftrace_function_probe(glob, ops, data); |
| 5a9479dc MD |
81 | } |
| 82 | #endif | |
| 83 | ||
| a90917c3 | 84 | #endif /* _LTTNG_WRAPPER_FTRACE_H */ |