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 | /* | |
| 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> | |
| c539a324 | 19 | #include "kallsyms.h" |
| 5a9479dc MD |
20 | |
| 21 | static inline | |
| 22 | int wrapper_register_ftrace_function_probe(char *glob, | |
| 23 | struct ftrace_probe_ops *ops, void *data) | |
| 24 | { | |
| 25 | int (*register_ftrace_function_probe_sym)(char *glob, | |
| 26 | struct ftrace_probe_ops *ops, void *data); | |
| 27 | ||
| c539a324 | 28 | register_ftrace_function_probe_sym = (void *) kallsyms_lookup_funcptr("register_ftrace_function_probe"); |
| 5a9479dc MD |
29 | if (register_ftrace_function_probe_sym) { |
| 30 | return register_ftrace_function_probe_sym(glob, ops, data); | |
| 31 | } else { | |
| 32 | printk(KERN_WARNING "LTTng: register_ftrace_function_probe symbol lookup failed.\n"); | |
| 33 | return -EINVAL; | |
| 34 | } | |
| 35 | } | |
| 36 | ||
| 37 | static inline | |
| 38 | void wrapper_unregister_ftrace_function_probe(char *glob, | |
| 39 | struct ftrace_probe_ops *ops, void *data) | |
| 40 | { | |
| 41 | void (*unregister_ftrace_function_probe_sym)(char *glob, | |
| 42 | struct ftrace_probe_ops *ops, void *data); | |
| 43 | ||
| c539a324 | 44 | unregister_ftrace_function_probe_sym = (void *) kallsyms_lookup_funcptr("unregister_ftrace_function_probe"); |
| 5a9479dc MD |
45 | if (unregister_ftrace_function_probe_sym) { |
| 46 | unregister_ftrace_function_probe_sym(glob, ops, data); | |
| 47 | } else { | |
| 48 | printk(KERN_WARNING "LTTng: unregister_ftrace_function_probe symbol lookup failed.\n"); | |
| 49 | WARN_ON(1); | |
| 50 | } | |
| 51 | } | |
| 52 | ||
| 53 | #else | |
| 54 | ||
| 55 | static inline | |
| 56 | int wrapper_register_ftrace_function_probe(char *glob, | |
| c4c357a4 | 57 | struct ftrace_probe_ops *ops, void *data) |
| 5a9479dc | 58 | { |
| 9fe47d18 | 59 | return register_ftrace_function_probe(glob, ops, data); |
| 5a9479dc MD |
60 | } |
| 61 | ||
| 62 | static inline | |
| 63 | void wrapper_unregister_ftrace_function_probe(char *glob, | |
| c4c357a4 | 64 | struct ftrace_probe_ops *ops, void *data) |
| 5a9479dc | 65 | { |
| 9fe47d18 | 66 | return unregister_ftrace_function_probe(glob, ops, data); |
| 5a9479dc MD |
67 | } |
| 68 | #endif | |
| 69 | ||
| a90917c3 | 70 | #endif /* _LTTNG_WRAPPER_FTRACE_H */ |