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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_KPROBES_H
2#define _LINUX_KPROBES_H
3/*
4 * Kernel Probes (KProbes)
5 * include/linux/kprobes.h
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 *
21 * Copyright (C) IBM Corporation, 2002, 2004
22 *
23 * 2002-Oct Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
24 * Probes initial implementation ( includes suggestions from
25 * Rusty Russell).
26 * 2004-July Suparna Bhattacharya <suparna@in.ibm.com> added jumper probes
27 * interface to access function arguments.
Hien Nguyenb94cce92005-06-23 00:09:19 -070028 * 2005-May Hien Nguyen <hien@us.ibm.com> and Jim Keniston
29 * <jkenisto@us.ibm.com> and Prasanna S Panchamukhi
30 * <prasanna@in.ibm.com> added function-return probes.
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 */
Masami Hiramatsu324670b2013-04-04 19:40:50 +090032#include <linux/compiler.h> /* for __kprobes */
Ingo Molnar36dcd672008-07-29 12:00:59 +020033#include <linux/linkage.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/list.h>
35#include <linux/notifier.h>
36#include <linux/smp.h>
Paul Gortmaker187f1882011-11-23 20:12:59 -050037#include <linux/bug.h>
Ananth N Mavinakayanahallie6584522005-11-07 01:00:07 -080038#include <linux/percpu.h>
Ananth N Mavinakayanahalli3516a462005-11-07 01:00:13 -080039#include <linux/spinlock.h>
40#include <linux/rcupdate.h>
Ingo Molnar7a7d1cf2006-03-23 03:00:35 -080041#include <linux/mutex.h>
Masami Hiramatsuae6aa162012-06-05 19:28:32 +090042#include <linux/ftrace.h>
Hien Nguyenb94cce92005-06-23 00:09:19 -070043
Keshavamurthy Anil S00d7c052005-12-12 00:37:33 -080044#ifdef CONFIG_KPROBES
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <asm/kprobes.h>
46
Prasanna S Panchamukhiea32c652005-06-23 00:09:36 -070047/* kprobe_status settings */
48#define KPROBE_HIT_ACTIVE 0x00000001
49#define KPROBE_HIT_SS 0x00000002
50#define KPROBE_REENTER 0x00000004
51#define KPROBE_HIT_SSDONE 0x00000008
52
Masami Hiramatsudc198352009-01-29 14:25:08 -080053#else /* CONFIG_KPROBES */
54typedef int kprobe_opcode_t;
55struct arch_specific_insn {
56 int dummy;
57};
Masami Hiramatsudc198352009-01-29 14:25:08 -080058#endif /* CONFIG_KPROBES */
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -070059
Linus Torvalds1da177e2005-04-16 15:20:36 -070060struct kprobe;
61struct pt_regs;
Hien Nguyenb94cce92005-06-23 00:09:19 -070062struct kretprobe;
63struct kretprobe_instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064typedef int (*kprobe_pre_handler_t) (struct kprobe *, struct pt_regs *);
65typedef int (*kprobe_break_handler_t) (struct kprobe *, struct pt_regs *);
66typedef void (*kprobe_post_handler_t) (struct kprobe *, struct pt_regs *,
67 unsigned long flags);
68typedef int (*kprobe_fault_handler_t) (struct kprobe *, struct pt_regs *,
69 int trapnr);
Hien Nguyenb94cce92005-06-23 00:09:19 -070070typedef int (*kretprobe_handler_t) (struct kretprobe_instance *,
71 struct pt_regs *);
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073struct kprobe {
74 struct hlist_node hlist;
75
Ananth N Mavinakayanahalli64f562c2005-05-05 16:15:42 -070076 /* list of kprobes for multi-handler support */
77 struct list_head list;
78
Prasanna S Panchamukhiea32c652005-06-23 00:09:36 -070079 /*count the number of times this probe was temporarily disarmed */
80 unsigned long nmissed;
81
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 /* location of the probe point */
83 kprobe_opcode_t *addr;
84
Ananth N Mavinakayanahalli3a872d82006-10-02 02:17:30 -070085 /* Allow user to indicate symbol name of the probe point */
Ananth N Mavinakayanahalli9b3af292007-05-08 00:26:23 -070086 const char *symbol_name;
Ananth N Mavinakayanahalli3a872d82006-10-02 02:17:30 -070087
88 /* Offset into the symbol */
89 unsigned int offset;
90
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 /* Called before addr is executed. */
92 kprobe_pre_handler_t pre_handler;
93
94 /* Called after addr is executed, unless... */
95 kprobe_post_handler_t post_handler;
96
Masami Hiramatsucc00e9c2009-04-06 19:01:00 -070097 /*
98 * ... called if executing addr causes a fault (eg. page fault).
99 * Return 1 if it handled fault, otherwise kernel will see it.
100 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 kprobe_fault_handler_t fault_handler;
102
Masami Hiramatsucc00e9c2009-04-06 19:01:00 -0700103 /*
104 * ... called if breakpoint trap occurs in probe handler.
105 * Return 1 if it handled break, otherwise kernel will see it.
106 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 kprobe_break_handler_t break_handler;
108
109 /* Saved opcode (which has been replaced with breakpoint) */
110 kprobe_opcode_t opcode;
111
112 /* copy of the original instruction */
113 struct arch_specific_insn ainsn;
Masami Hiramatsue8386a02009-01-06 14:41:52 -0800114
Masami Hiramatsude5bd882009-04-06 19:01:02 -0700115 /*
116 * Indicates various status flags.
117 * Protected by kprobe_mutex after this kprobe is registered.
118 */
Masami Hiramatsue8386a02009-01-06 14:41:52 -0800119 u32 flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120};
121
Masami Hiramatsue8386a02009-01-06 14:41:52 -0800122/* Kprobe status flags */
123#define KPROBE_FLAG_GONE 1 /* breakpoint has already gone */
Masami Hiramatsude5bd882009-04-06 19:01:02 -0700124#define KPROBE_FLAG_DISABLED 2 /* probe is temporarily disabled */
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500125#define KPROBE_FLAG_OPTIMIZED 4 /*
126 * probe is really optimized.
127 * NOTE:
128 * this flag is only for optimized_kprobe.
129 */
Masami Hiramatsuae6aa162012-06-05 19:28:32 +0900130#define KPROBE_FLAG_FTRACE 8 /* probe is using ftrace */
Masami Hiramatsue8386a02009-01-06 14:41:52 -0800131
Masami Hiramatsude5bd882009-04-06 19:01:02 -0700132/* Has this kprobe gone ? */
Masami Hiramatsue8386a02009-01-06 14:41:52 -0800133static inline int kprobe_gone(struct kprobe *p)
134{
135 return p->flags & KPROBE_FLAG_GONE;
136}
137
Masami Hiramatsude5bd882009-04-06 19:01:02 -0700138/* Is this kprobe disabled ? */
139static inline int kprobe_disabled(struct kprobe *p)
140{
141 return p->flags & (KPROBE_FLAG_DISABLED | KPROBE_FLAG_GONE);
142}
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500143
144/* Is this kprobe really running optimized path ? */
145static inline int kprobe_optimized(struct kprobe *p)
146{
147 return p->flags & KPROBE_FLAG_OPTIMIZED;
148}
Masami Hiramatsuae6aa162012-06-05 19:28:32 +0900149
150/* Is this kprobe uses ftrace ? */
151static inline int kprobe_ftrace(struct kprobe *p)
152{
153 return p->flags & KPROBE_FLAG_FTRACE;
154}
155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156/*
157 * Special probe type that uses setjmp-longjmp type tricks to resume
158 * execution at a specified entry with a matching prototype corresponding
159 * to the probed function - a trick to enable arguments to become
160 * accessible seamlessly by probe handling logic.
161 * Note:
162 * Because of the way compilers allocate stack space for local variables
163 * etc upfront, regardless of sub-scopes within a function, this mirroring
164 * principle currently works only for probes placed on function entry points.
165 */
166struct jprobe {
167 struct kprobe kp;
Michael Ellerman81eae372007-07-19 01:48:09 -0700168 void *entry; /* probe handling code to jump to */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169};
170
Michael Ellerman9e367d82007-07-19 01:48:10 -0700171/* For backward compatibility with old code using JPROBE_ENTRY() */
172#define JPROBE_ENTRY(handler) (handler)
173
Hien Nguyenb94cce92005-06-23 00:09:19 -0700174/*
175 * Function-return probe -
176 * Note:
177 * User needs to provide a handler function, and initialize maxactive.
178 * maxactive - The maximum number of instances of the probed function that
179 * can be active concurrently.
180 * nmissed - tracks the number of times the probed function's return was
181 * ignored, due to maxactive being too low.
182 *
183 */
184struct kretprobe {
185 struct kprobe kp;
186 kretprobe_handler_t handler;
Abhishek Sagarf47cd9b2008-02-06 01:38:22 -0800187 kretprobe_handler_t entry_handler;
Hien Nguyenb94cce92005-06-23 00:09:19 -0700188 int maxactive;
189 int nmissed;
Abhishek Sagarf47cd9b2008-02-06 01:38:22 -0800190 size_t data_size;
Hien Nguyenb94cce92005-06-23 00:09:19 -0700191 struct hlist_head free_instances;
Thomas Gleixnerec4846082009-07-25 16:09:17 +0200192 raw_spinlock_t lock;
Hien Nguyenb94cce92005-06-23 00:09:19 -0700193};
194
195struct kretprobe_instance {
Hien Nguyenb94cce92005-06-23 00:09:19 -0700196 struct hlist_node hlist;
197 struct kretprobe *rp;
Rusty Lynch802eae72005-06-27 15:17:08 -0700198 kprobe_opcode_t *ret_addr;
199 struct task_struct *task;
Abhishek Sagarf47cd9b2008-02-06 01:38:22 -0800200 char data[0];
Hien Nguyenb94cce92005-06-23 00:09:19 -0700201};
202
Masami Hiramatsuf438d912007-10-16 01:27:49 -0700203struct kretprobe_blackpoint {
204 const char *name;
205 void *addr;
206};
Srinivasa Ds3d8d9962008-04-28 02:14:26 -0700207
Masami Hiramatsu376e2422014-04-17 17:17:05 +0900208struct kprobe_blacklist_entry {
209 struct list_head list;
Srinivasa Ds3d8d9962008-04-28 02:14:26 -0700210 unsigned long start_addr;
Masami Hiramatsu376e2422014-04-17 17:17:05 +0900211 unsigned long end_addr;
Srinivasa Ds3d8d9962008-04-28 02:14:26 -0700212};
213
Masami Hiramatsudc198352009-01-29 14:25:08 -0800214#ifdef CONFIG_KPROBES
215DECLARE_PER_CPU(struct kprobe *, current_kprobe);
216DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
217
Ingo Molnarb1801812009-02-20 22:42:57 +0100218/*
219 * For #ifdef avoidance:
220 */
221static inline int kprobes_built_in(void)
222{
223 return 1;
224}
225
Masami Hiramatsudc198352009-01-29 14:25:08 -0800226#ifdef CONFIG_KRETPROBES
227extern void arch_prepare_kretprobe(struct kretprobe_instance *ri,
228 struct pt_regs *regs);
229extern int arch_trampoline_kprobe(struct kprobe *p);
230#else /* CONFIG_KRETPROBES */
231static inline void arch_prepare_kretprobe(struct kretprobe *rp,
232 struct pt_regs *regs)
233{
234}
235static inline int arch_trampoline_kprobe(struct kprobe *p)
236{
237 return 0;
238}
239#endif /* CONFIG_KRETPROBES */
240
Masami Hiramatsuf438d912007-10-16 01:27:49 -0700241extern struct kretprobe_blackpoint kretprobe_blacklist[];
242
Ananth N Mavinakayanahalli0f95b7f2007-05-08 00:28:27 -0700243static inline void kretprobe_assert(struct kretprobe_instance *ri,
244 unsigned long orig_ret_address, unsigned long trampoline_address)
245{
246 if (!orig_ret_address || (orig_ret_address == trampoline_address)) {
247 printk("kretprobe BUG!: Processing kretprobe %p @ %p\n",
248 ri->rp, ri->rp->kp.addr);
249 BUG();
250 }
251}
252
Ananth N Mavinakayanahalli8c1c9352008-01-30 13:32:53 +0100253#ifdef CONFIG_KPROBES_SANITY_TEST
254extern int init_test_probes(void);
255#else
256static inline int init_test_probes(void)
257{
258 return 0;
259}
260#endif /* CONFIG_KPROBES_SANITY_TEST */
261
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262extern int arch_prepare_kprobe(struct kprobe *p);
Rusty Lynch7e1048b2005-06-23 00:09:25 -0700263extern void arch_arm_kprobe(struct kprobe *p);
264extern void arch_disarm_kprobe(struct kprobe *p);
Rusty Lynch67729262005-07-05 18:54:50 -0700265extern int arch_init_kprobes(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266extern void show_registers(struct pt_regs *regs);
Keshavamurthy Anil Sbf8d5c52005-12-12 00:37:34 -0800267extern void kprobes_inc_nmissed_count(struct kprobe *p);
Masami Hiramatsube8f2742014-04-17 17:16:58 +0900268extern bool arch_within_kprobe_blacklist(unsigned long addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
Andy Lutomirskie5779e82015-07-30 20:32:40 -0700270extern bool within_kprobe_blacklist(unsigned long addr);
271
Heiko Carstensc802d642013-09-11 14:24:11 -0700272struct kprobe_insn_cache {
273 struct mutex mutex;
Heiko Carstensaf963972013-09-11 14:24:13 -0700274 void *(*alloc)(void); /* allocate insn page */
275 void (*free)(void *); /* free insn page */
Heiko Carstensc802d642013-09-11 14:24:11 -0700276 struct list_head pages; /* list of kprobe_insn_page */
277 size_t insn_size; /* size of instruction slot */
278 int nr_garbage;
279};
280
281extern kprobe_opcode_t *__get_insn_slot(struct kprobe_insn_cache *c);
282extern void __free_insn_slot(struct kprobe_insn_cache *c,
283 kprobe_opcode_t *slot, int dirty);
284
285#define DEFINE_INSN_CACHE_OPS(__name) \
286extern struct kprobe_insn_cache kprobe_##__name##_slots; \
287 \
288static inline kprobe_opcode_t *get_##__name##_slot(void) \
289{ \
290 return __get_insn_slot(&kprobe_##__name##_slots); \
291} \
292 \
293static inline void free_##__name##_slot(kprobe_opcode_t *slot, int dirty)\
294{ \
295 __free_insn_slot(&kprobe_##__name##_slots, slot, dirty); \
296} \
297
298DEFINE_INSN_CACHE_OPS(insn);
299
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500300#ifdef CONFIG_OPTPROBES
301/*
302 * Internal structure for direct jump optimized probe
303 */
304struct optimized_kprobe {
305 struct kprobe kp;
306 struct list_head list; /* list for optimizing queue */
307 struct arch_optimized_insn optinsn;
308};
309
310/* Architecture dependent functions for direct jump optimization */
311extern int arch_prepared_optinsn(struct arch_optimized_insn *optinsn);
312extern int arch_check_optimized_kprobe(struct optimized_kprobe *op);
Masami Hiramatsucbf6ab52015-01-05 19:29:32 +0800313extern int arch_prepare_optimized_kprobe(struct optimized_kprobe *op,
314 struct kprobe *orig);
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500315extern void arch_remove_optimized_kprobe(struct optimized_kprobe *op);
Masami Hiramatsucd7ebe22010-12-03 18:54:28 +0900316extern void arch_optimize_kprobes(struct list_head *oplist);
Masami Hiramatsuf984ba42010-12-03 18:54:34 +0900317extern void arch_unoptimize_kprobes(struct list_head *oplist,
318 struct list_head *done_list);
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500319extern void arch_unoptimize_kprobe(struct optimized_kprobe *op);
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500320extern int arch_within_optimized_kprobe(struct optimized_kprobe *op,
321 unsigned long addr);
322
323extern void opt_pre_handler(struct kprobe *p, struct pt_regs *regs);
Masami Hiramatsub2be84d2010-02-25 08:34:15 -0500324
Heiko Carstensc802d642013-09-11 14:24:11 -0700325DEFINE_INSN_CACHE_OPS(optinsn);
326
Masami Hiramatsub2be84d2010-02-25 08:34:15 -0500327#ifdef CONFIG_SYSCTL
328extern int sysctl_kprobes_optimization;
329extern int proc_kprobes_optimization_handler(struct ctl_table *table,
330 int write, void __user *buffer,
331 size_t *length, loff_t *ppos);
332#endif
333
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500334#endif /* CONFIG_OPTPROBES */
Masami Hiramatsue7dbfe32012-09-28 17:15:20 +0900335#ifdef CONFIG_KPROBES_ON_FTRACE
Masami Hiramatsuae6aa162012-06-05 19:28:32 +0900336extern void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
Masami Hiramatsue5253892012-06-05 19:28:38 +0900337 struct ftrace_ops *ops, struct pt_regs *regs);
Masami Hiramatsuae6aa162012-06-05 19:28:32 +0900338extern int arch_prepare_kprobe_ftrace(struct kprobe *p);
339#endif
340
Heiko Carstensf7f242f2014-10-15 12:17:34 +0200341int arch_check_ftrace_location(struct kprobe *p);
Masami Hiramatsuafd66252010-02-25 08:34:07 -0500342
Ananth N Mavinakayanahallid217d542005-11-07 01:00:14 -0800343/* Get the kprobe at this addr (if any) - called with preemption disabled */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344struct kprobe *get_kprobe(void *addr);
Srinivasa D Sef53d9c2008-07-25 01:46:04 -0700345void kretprobe_hash_lock(struct task_struct *tsk,
346 struct hlist_head **head, unsigned long *flags);
347void kretprobe_hash_unlock(struct task_struct *tsk, unsigned long *flags);
Hien Nguyenb94cce92005-06-23 00:09:19 -0700348struct hlist_head * kretprobe_inst_table_head(struct task_struct *tsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Ananth N Mavinakayanahallie6584522005-11-07 01:00:07 -0800350/* kprobe_running() will just return the current_kprobe on this CPU */
351static inline struct kprobe *kprobe_running(void)
352{
Christoph Lameterb76834b2010-12-06 11:16:25 -0600353 return (__this_cpu_read(current_kprobe));
Ananth N Mavinakayanahallie6584522005-11-07 01:00:07 -0800354}
355
356static inline void reset_current_kprobe(void)
357{
Christoph Lameterb76834b2010-12-06 11:16:25 -0600358 __this_cpu_write(current_kprobe, NULL);
Ananth N Mavinakayanahallie6584522005-11-07 01:00:07 -0800359}
360
361static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
362{
Christoph Lameterbdffd892014-04-29 14:17:40 -0500363 return this_cpu_ptr(&kprobe_ctlblk);
Ananth N Mavinakayanahallie6584522005-11-07 01:00:07 -0800364}
365
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366int register_kprobe(struct kprobe *p);
367void unregister_kprobe(struct kprobe *p);
Masami Hiramatsu98616682008-04-28 02:14:28 -0700368int register_kprobes(struct kprobe **kps, int num);
369void unregister_kprobes(struct kprobe **kps, int num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370int setjmp_pre_handler(struct kprobe *, struct pt_regs *);
371int longjmp_break_handler(struct kprobe *, struct pt_regs *);
372int register_jprobe(struct jprobe *p);
373void unregister_jprobe(struct jprobe *p);
Masami Hiramatsu26b31c12008-04-28 02:14:29 -0700374int register_jprobes(struct jprobe **jps, int num);
375void unregister_jprobes(struct jprobe **jps, int num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376void jprobe_return(void);
Michael Ellerman3d7e3382007-07-19 01:48:11 -0700377unsigned long arch_deref_entry_point(void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Hien Nguyenb94cce92005-06-23 00:09:19 -0700379int register_kretprobe(struct kretprobe *rp);
380void unregister_kretprobe(struct kretprobe *rp);
Masami Hiramatsu4a296e02008-04-28 02:14:29 -0700381int register_kretprobes(struct kretprobe **rps, int num);
382void unregister_kretprobes(struct kretprobe **rps, int num);
Hien Nguyenb94cce92005-06-23 00:09:19 -0700383
Hien Nguyenb94cce92005-06-23 00:09:19 -0700384void kprobe_flush_task(struct task_struct *tk);
bibo,mao99219a32006-10-02 02:17:35 -0700385void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);
Ananth N Mavinakayanahalli8c1c9352008-01-30 13:32:53 +0100386
Masami Hiramatsude5bd882009-04-06 19:01:02 -0700387int disable_kprobe(struct kprobe *kp);
388int enable_kprobe(struct kprobe *kp);
389
Frederic Weisbecker24851d22009-08-26 23:38:30 +0200390void dump_kprobe(struct kprobe *kp);
391
Ingo Molnarb1801812009-02-20 22:42:57 +0100392#else /* !CONFIG_KPROBES: */
Keshavamurthy Anil S00d7c052005-12-12 00:37:33 -0800393
Ingo Molnarb1801812009-02-20 22:42:57 +0100394static inline int kprobes_built_in(void)
395{
396 return 0;
397}
398static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
399{
400 return 0;
401}
Abhishek Sagar785656a2008-06-21 23:47:39 +0530402static inline struct kprobe *get_kprobe(void *addr)
403{
404 return NULL;
405}
Ananth N Mavinakayanahallie6584522005-11-07 01:00:07 -0800406static inline struct kprobe *kprobe_running(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407{
Ananth N Mavinakayanahallie6584522005-11-07 01:00:07 -0800408 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409}
410static inline int register_kprobe(struct kprobe *p)
411{
412 return -ENOSYS;
413}
Masami Hiramatsu98616682008-04-28 02:14:28 -0700414static inline int register_kprobes(struct kprobe **kps, int num)
415{
416 return -ENOSYS;
417}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418static inline void unregister_kprobe(struct kprobe *p)
419{
420}
Masami Hiramatsu98616682008-04-28 02:14:28 -0700421static inline void unregister_kprobes(struct kprobe **kps, int num)
422{
423}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424static inline int register_jprobe(struct jprobe *p)
425{
426 return -ENOSYS;
427}
Masami Hiramatsu26b31c12008-04-28 02:14:29 -0700428static inline int register_jprobes(struct jprobe **jps, int num)
429{
430 return -ENOSYS;
431}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432static inline void unregister_jprobe(struct jprobe *p)
433{
434}
Masami Hiramatsu26b31c12008-04-28 02:14:29 -0700435static inline void unregister_jprobes(struct jprobe **jps, int num)
436{
437}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438static inline void jprobe_return(void)
439{
440}
Hien Nguyenb94cce92005-06-23 00:09:19 -0700441static inline int register_kretprobe(struct kretprobe *rp)
442{
443 return -ENOSYS;
444}
Masami Hiramatsu4a296e02008-04-28 02:14:29 -0700445static inline int register_kretprobes(struct kretprobe **rps, int num)
446{
447 return -ENOSYS;
448}
Hien Nguyenb94cce92005-06-23 00:09:19 -0700449static inline void unregister_kretprobe(struct kretprobe *rp)
450{
451}
Masami Hiramatsu4a296e02008-04-28 02:14:29 -0700452static inline void unregister_kretprobes(struct kretprobe **rps, int num)
453{
454}
Hien Nguyenb94cce92005-06-23 00:09:19 -0700455static inline void kprobe_flush_task(struct task_struct *tk)
456{
457}
Masami Hiramatsude5bd882009-04-06 19:01:02 -0700458static inline int disable_kprobe(struct kprobe *kp)
459{
460 return -ENOSYS;
461}
462static inline int enable_kprobe(struct kprobe *kp)
463{
464 return -ENOSYS;
465}
Ingo Molnarb1801812009-02-20 22:42:57 +0100466#endif /* CONFIG_KPROBES */
Masami Hiramatsu8f9b1522009-04-06 19:01:02 -0700467static inline int disable_kretprobe(struct kretprobe *rp)
468{
469 return disable_kprobe(&rp->kp);
470}
471static inline int enable_kretprobe(struct kretprobe *rp)
472{
473 return enable_kprobe(&rp->kp);
474}
475static inline int disable_jprobe(struct jprobe *jp)
476{
477 return disable_kprobe(&jp->kp);
478}
479static inline int enable_jprobe(struct jprobe *jp)
480{
481 return enable_kprobe(&jp->kp);
482}
483
Masami Hiramatsu376e2422014-04-17 17:17:05 +0900484#ifdef CONFIG_KPROBES
485/*
486 * Blacklist ganerating macro. Specify functions which is not probed
487 * by using this macro.
488 */
489#define __NOKPROBE_SYMBOL(fname) \
490static unsigned long __used \
491 __attribute__((section("_kprobe_blacklist"))) \
492 _kbl_addr_##fname = (unsigned long)fname;
493#define NOKPROBE_SYMBOL(fname) __NOKPROBE_SYMBOL(fname)
494#else
495#define NOKPROBE_SYMBOL(fname)
496#endif
497
Ingo Molnarb1801812009-02-20 22:42:57 +0100498#endif /* _LINUX_KPROBES_H */