projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 5a9479dc MD |
1 | #ifndef _LTT_WRAPPER_FTRACE_H |
| 2 | #define _LTT_WRAPPER_FTRACE_H | |
| 3 | ||
| 4 | /* | |
| 5 | * Copyright (C) 2011 Mathieu Desnoyers (mathieu.desnoyers@efficios.com) | |
| 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 | * | |
| 11 | * Dual LGPL v2.1/GPL v2 license. | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/ftrace.h> | |
| 15 | ||
| 16 | #ifdef CONFIG_KALLSYMS | |
| 17 | ||
| 18 | #include <linux/kallsyms.h> | |
| 19 | ||
| 20 | static inline | |
| 21 | int wrapper_register_ftrace_function_probe(char *glob, | |
| 22 | struct ftrace_probe_ops *ops, void *data) | |
| 23 | { | |
| 24 | int (*register_ftrace_function_probe_sym)(char *glob, | |
| 25 | struct ftrace_probe_ops *ops, void *data); | |
| 26 | ||
| 1c726b25 | 27 | register_ftrace_function_probe_sym = (void *) kallsyms_lookup_name("register_ftrace_function_probe"); |
| 5a9479dc MD |
28 | if (register_ftrace_function_probe_sym) { |
| 29 | return register_ftrace_function_probe_sym(glob, ops, data); | |
| 30 | } else { | |
| 31 | printk(KERN_WARNING "LTTng: register_ftrace_function_probe symbol lookup failed.\n"); | |
| 32 | return -EINVAL; | |
| 33 | } | |
| 34 | } | |
| 35 | ||
| 36 | static inline | |
| 37 | void wrapper_unregister_ftrace_function_probe(char *glob, | |
| 38 | struct ftrace_probe_ops *ops, void *data) | |
| 39 | { | |
| 40 | void (*unregister_ftrace_function_probe_sym)(char *glob, | |
| 41 | struct ftrace_probe_ops *ops, void *data); | |
| 42 | ||
| 1c726b25 | 43 | unregister_ftrace_function_probe_sym = (void *) kallsyms_lookup_name("unregister_ftrace_function_probe"); |
| 5a9479dc MD |
44 | if (unregister_ftrace_function_probe_sym) { |
| 45 | unregister_ftrace_function_probe_sym(glob, ops, data); | |
| 46 | } else { | |
| 47 | printk(KERN_WARNING "LTTng: unregister_ftrace_function_probe symbol lookup failed.\n"); | |
| 48 | WARN_ON(1); | |
| 49 | } | |
| 50 | } | |
| 51 | ||
| 52 | #else | |
| 53 | ||
| 54 | static inline | |
| 55 | int wrapper_register_ftrace_function_probe(char *glob, | |
| c4c357a4 | 56 | struct ftrace_probe_ops *ops, void *data) |
| 5a9479dc MD |
57 | { |
| 58 | return unregister_ftrace_function_probe(); | |
| 59 | } | |
| 60 | ||
| 61 | static inline | |
| 62 | void wrapper_unregister_ftrace_function_probe(char *glob, | |
| c4c357a4 | 63 | struct ftrace_probe_ops *ops, void *data) |
| 5a9479dc MD |
64 | { |
| 65 | return unregister_ftrace_function_probe(); | |
| 66 | } | |
| 67 | #endif | |
| 68 | ||
| 69 | #endif /* _LTT_WRAPPER_FTRACE_H */ |