[mirror_ubuntu-bionic-kernel.git] / include / linux / kprobes.h

#ifndef _LINUX_KPROBES_H
#define _LINUX_KPROBES_H
/*
 *  Kernel Probes (KProbes)
 *  include/linux/kprobes.h
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * Copyright (C) IBM Corporation, 2002, 2004
 *
 * 2002-Oct	Created by Vamsi Krishna S <vamsi_krishna@in.ibm.com> Kernel
 *		Probes initial implementation ( includes suggestions from
 *		Rusty Russell).
 * 2004-July	Suparna Bhattacharya <suparna@in.ibm.com> added jumper probes
 *		interface to access function arguments.
 * 2005-May	Hien Nguyen <hien@us.ibm.com> and Jim Keniston
 *		<jkenisto@us.ibm.com>  and Prasanna S Panchamukhi
 *		<prasanna@in.ibm.com> added function-return probes.
 */
#include <linux/linkage.h>
#include <linux/list.h>
#include <linux/notifier.h>
#include <linux/smp.h>
#include <linux/percpu.h>
#include <linux/spinlock.h>
#include <linux/rcupdate.h>
#include <linux/mutex.h>

#ifdef CONFIG_KPROBES
#include <asm/kprobes.h>

/* kprobe_status settings */
#define KPROBE_HIT_ACTIVE	0x00000001
#define KPROBE_HIT_SS		0x00000002
#define KPROBE_REENTER		0x00000004
#define KPROBE_HIT_SSDONE	0x00000008

/* Attach to insert probes on any functions which should be ignored*/
#define __kprobes	__attribute__((__section__(".kprobes.text"))) notrace
#else /* CONFIG_KPROBES */
typedef int kprobe_opcode_t;
struct arch_specific_insn {
	int dummy;
};
#define __kprobes	notrace
#endif /* CONFIG_KPROBES */

struct kprobe;
struct pt_regs;
struct kretprobe;
struct kretprobe_instance;
typedef int (*kprobe_pre_handler_t) (struct kprobe *, struct pt_regs *);
typedef int (*kprobe_break_handler_t) (struct kprobe *, struct pt_regs *);
typedef void (*kprobe_post_handler_t) (struct kprobe *, struct pt_regs *,
				       unsigned long flags);
typedef int (*kprobe_fault_handler_t) (struct kprobe *, struct pt_regs *,
				       int trapnr);
typedef int (*kretprobe_handler_t) (struct kretprobe_instance *,
				    struct pt_regs *);

struct kprobe {
	struct hlist_node hlist;

	/* list of kprobes for multi-handler support */
	struct list_head list;

	/*count the number of times this probe was temporarily disarmed */
	unsigned long nmissed;

	/* location of the probe point */
	kprobe_opcode_t *addr;

	/* Allow user to indicate symbol name of the probe point */
	const char *symbol_name;

	/* Offset into the symbol */
	unsigned int offset;

	/* Called before addr is executed. */
	kprobe_pre_handler_t pre_handler;

	/* Called after addr is executed, unless... */
	kprobe_post_handler_t post_handler;

	/*
	 * ... called if executing addr causes a fault (eg. page fault).
	 * Return 1 if it handled fault, otherwise kernel will see it.
	 */
	kprobe_fault_handler_t fault_handler;

	/*
	 * ... called if breakpoint trap occurs in probe handler.
	 * Return 1 if it handled break, otherwise kernel will see it.
	 */
	kprobe_break_handler_t break_handler;

	/* Saved opcode (which has been replaced with breakpoint) */
	kprobe_opcode_t opcode;

	/* copy of the original instruction */
	struct arch_specific_insn ainsn;

	/*
	 * Indicates various status flags.
	 * Protected by kprobe_mutex after this kprobe is registered.
	 */
	u32 flags;
};

/* Kprobe status flags */
#define KPROBE_FLAG_GONE	1 /* breakpoint has already gone */
#define KPROBE_FLAG_DISABLED	2 /* probe is temporarily disabled */

/* Has this kprobe gone ? */
static inline int kprobe_gone(struct kprobe *p)
{
	return p->flags & KPROBE_FLAG_GONE;
}

/* Is this kprobe disabled ? */
static inline int kprobe_disabled(struct kprobe *p)
{
	return p->flags & (KPROBE_FLAG_DISABLED | KPROBE_FLAG_GONE);
}
/*
 * Special probe type that uses setjmp-longjmp type tricks to resume
 * execution at a specified entry with a matching prototype corresponding
 * to the probed function - a trick to enable arguments to become
 * accessible seamlessly by probe handling logic.
 * Note:
 * Because of the way compilers allocate stack space for local variables
 * etc upfront, regardless of sub-scopes within a function, this mirroring
 * principle currently works only for probes placed on function entry points.
 */
struct jprobe {
	struct kprobe kp;
	void *entry;	/* probe handling code to jump to */
};

/* For backward compatibility with old code using JPROBE_ENTRY() */
#define JPROBE_ENTRY(handler)	(handler)

/*
 * Function-return probe -
 * Note:
 * User needs to provide a handler function, and initialize maxactive.
 * maxactive - The maximum number of instances of the probed function that
 * can be active concurrently.
 * nmissed - tracks the number of times the probed function's return was
 * ignored, due to maxactive being too low.
 *
 */
struct kretprobe {
	struct kprobe kp;
	kretprobe_handler_t handler;
	kretprobe_handler_t entry_handler;
	int maxactive;
	int nmissed;
	size_t data_size;
	struct hlist_head free_instances;
	spinlock_t lock;
};

struct kretprobe_instance {
	struct hlist_node hlist;
	struct kretprobe *rp;
	kprobe_opcode_t *ret_addr;
	struct task_struct *task;
	char data[0];
};

struct kretprobe_blackpoint {
	const char *name;
	void *addr;
};

struct kprobe_blackpoint {
	const char *name;
	unsigned long start_addr;
	unsigned long range;
};

#ifdef CONFIG_KPROBES
DECLARE_PER_CPU(struct kprobe *, current_kprobe);
DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);

/*
 * For #ifdef avoidance:
 */
static inline int kprobes_built_in(void)
{
	return 1;
}

#ifdef CONFIG_KRETPROBES
extern void arch_prepare_kretprobe(struct kretprobe_instance *ri,
				   struct pt_regs *regs);
extern int arch_trampoline_kprobe(struct kprobe *p);
#else /* CONFIG_KRETPROBES */
static inline void arch_prepare_kretprobe(struct kretprobe *rp,
					struct pt_regs *regs)
{
}
static inline int arch_trampoline_kprobe(struct kprobe *p)
{
	return 0;
}
#endif /* CONFIG_KRETPROBES */

extern struct kretprobe_blackpoint kretprobe_blacklist[];

static inline void kretprobe_assert(struct kretprobe_instance *ri,
	unsigned long orig_ret_address, unsigned long trampoline_address)
{
	if (!orig_ret_address || (orig_ret_address == trampoline_address)) {
		printk("kretprobe BUG!: Processing kretprobe %p @ %p\n",
				ri->rp, ri->rp->kp.addr);
		BUG();
	}
}

#ifdef CONFIG_KPROBES_SANITY_TEST
extern int init_test_probes(void);
#else
static inline int init_test_probes(void)
{
	return 0;
}
#endif /* CONFIG_KPROBES_SANITY_TEST */

extern int arch_prepare_kprobe(struct kprobe *p);
extern void arch_arm_kprobe(struct kprobe *p);
extern void arch_disarm_kprobe(struct kprobe *p);
extern int arch_init_kprobes(void);
extern void show_registers(struct pt_regs *regs);
extern kprobe_opcode_t *get_insn_slot(void);
extern void free_insn_slot(kprobe_opcode_t *slot, int dirty);
extern void kprobes_inc_nmissed_count(struct kprobe *p);

/* Get the kprobe at this addr (if any) - called with preemption disabled */
struct kprobe *get_kprobe(void *addr);
void kretprobe_hash_lock(struct task_struct *tsk,
			 struct hlist_head **head, unsigned long *flags);
void kretprobe_hash_unlock(struct task_struct *tsk, unsigned long *flags);
struct hlist_head * kretprobe_inst_table_head(struct task_struct *tsk);

/* kprobe_running() will just return the current_kprobe on this CPU */
static inline struct kprobe *kprobe_running(void)
{
	return (__get_cpu_var(current_kprobe));
}

static inline void reset_current_kprobe(void)
{
	__get_cpu_var(current_kprobe) = NULL;
}

static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
{
	return (&__get_cpu_var(kprobe_ctlblk));
}

int register_kprobe(struct kprobe *p);
void unregister_kprobe(struct kprobe *p);
int register_kprobes(struct kprobe **kps, int num);
void unregister_kprobes(struct kprobe **kps, int num);
int setjmp_pre_handler(struct kprobe *, struct pt_regs *);
int longjmp_break_handler(struct kprobe *, struct pt_regs *);
int register_jprobe(struct jprobe *p);
void unregister_jprobe(struct jprobe *p);
int register_jprobes(struct jprobe **jps, int num);
void unregister_jprobes(struct jprobe **jps, int num);
void jprobe_return(void);
unsigned long arch_deref_entry_point(void *);

int register_kretprobe(struct kretprobe *rp);
void unregister_kretprobe(struct kretprobe *rp);
int register_kretprobes(struct kretprobe **rps, int num);
void unregister_kretprobes(struct kretprobe **rps, int num);

void kprobe_flush_task(struct task_struct *tk);
void recycle_rp_inst(struct kretprobe_instance *ri, struct hlist_head *head);

int disable_kprobe(struct kprobe *kp);
int enable_kprobe(struct kprobe *kp);

#else /* !CONFIG_KPROBES: */

static inline int kprobes_built_in(void)
{
	return 0;
}
static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
{
	return 0;
}
static inline struct kprobe *get_kprobe(void *addr)
{
	return NULL;
}
static inline struct kprobe *kprobe_running(void)
{
	return NULL;
}
static inline int register_kprobe(struct kprobe *p)
{
	return -ENOSYS;
}
static inline int register_kprobes(struct kprobe **kps, int num)
{
	return -ENOSYS;
}
static inline void unregister_kprobe(struct kprobe *p)
{
}
static inline void unregister_kprobes(struct kprobe **kps, int num)
{
}
static inline int register_jprobe(struct jprobe *p)
{
	return -ENOSYS;
}
static inline int register_jprobes(struct jprobe **jps, int num)
{
	return -ENOSYS;
}
static inline void unregister_jprobe(struct jprobe *p)
{
}
static inline void unregister_jprobes(struct jprobe **jps, int num)
{
}
static inline void jprobe_return(void)
{
}
static inline int register_kretprobe(struct kretprobe *rp)
{
	return -ENOSYS;
}
static inline int register_kretprobes(struct kretprobe **rps, int num)
{
	return -ENOSYS;
}
static inline void unregister_kretprobe(struct kretprobe *rp)
{
}
static inline void unregister_kretprobes(struct kretprobe **rps, int num)
{
}
static inline void kprobe_flush_task(struct task_struct *tk)
{
}
static inline int disable_kprobe(struct kprobe *kp)
{
	return -ENOSYS;
}
static inline int enable_kprobe(struct kprobe *kp)
{
	return -ENOSYS;
}
#endif /* CONFIG_KPROBES */
#endif /* _LINUX_KPROBES_H */
Commit	Line	Data
1da177e4 LT	1	#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.
b94cce92 HN	28	* 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.
1da177e4	31	*/
36dcd67a	32	#include <linux/linkage.h>
1da177e4 LT	33	#include <linux/list.h>
	34	#include <linux/notifier.h>
	35	#include <linux/smp.h>
e6584523	36	#include <linux/percpu.h>
3516a460 AM	37	#include <linux/spinlock.h>
3516a460 AM	38	#include <linux/rcupdate.h>
7a7d1cf9	39	#include <linux/mutex.h>
b94cce92	40
00d7c05a	41	#ifdef CONFIG_KPROBES
1da177e4 LT	42	#include <asm/kprobes.h>
1da177e4 LT	43
ea32c65c PP	44	/* kprobe_status settings */
	45	#define KPROBE_HIT_ACTIVE 0x00000001
	46	#define KPROBE_HIT_SS 0x00000002
	47	#define KPROBE_REENTER 0x00000004
	48	#define KPROBE_HIT_SSDONE 0x00000008
	49
d0aaff97	50	/* Attach to insert probes on any functions which should be ignored*/
36dcd67a	51	#define __kprobes __attribute__((__section__(".kprobes.text"))) notrace
dc19835d MH	52	#else /* CONFIG_KPROBES */
	53	typedef int kprobe_opcode_t;
	54	struct arch_specific_insn {
	55	int dummy;
	56	};
	57	#define __kprobes notrace
	58	#endif /* CONFIG_KPROBES */
d0aaff97	59
1da177e4 LT	60	struct kprobe;
1da177e4 LT	61	struct pt_regs;
b94cce92 HN	62	struct kretprobe;
b94cce92 HN	63	struct kretprobe_instance;
1da177e4 LT	64	typedef int (kprobe_pre_handler_t) (struct kprobe , struct pt_regs *);
	65	typedef int (kprobe_break_handler_t) (struct kprobe , struct pt_regs *);
	66	typedef void (kprobe_post_handler_t) (struct kprobe , struct pt_regs *,
	67	unsigned long flags);
	68	typedef int (kprobe_fault_handler_t) (struct kprobe , struct pt_regs *,
	69	int trapnr);
b94cce92 HN	70	typedef int (kretprobe_handler_t) (struct kretprobe_instance ,
	71	struct pt_regs *);
	72
1da177e4 LT	73	struct kprobe {
	74	struct hlist_node hlist;
	75
64f562c6 AM	76	/* list of kprobes for multi-handler support */
	77	struct list_head list;
	78
ea32c65c PP	79	/count the number of times this probe was temporarily disarmed /
	80	unsigned long nmissed;
	81
1da177e4 LT	82	/* location of the probe point */
	83	kprobe_opcode_t *addr;
	84
3a872d89	85	/* Allow user to indicate symbol name of the probe point */
9b3af29b	86	const char *symbol_name;
3a872d89 AM	87
	88	/* Offset into the symbol */
	89	unsigned int offset;
	90
1da177e4 LT	91	/* 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
cc00e9cf MH	97	/*
	98	* ... called if executing addr causes a fault (eg. page fault).
	99	* Return 1 if it handled fault, otherwise kernel will see it.
	100	*/
1da177e4 LT	101	kprobe_fault_handler_t fault_handler;
1da177e4 LT	102
cc00e9cf MH	103	/*
	104	* ... called if breakpoint trap occurs in probe handler.
	105	* Return 1 if it handled break, otherwise kernel will see it.
	106	*/
1da177e4 LT	107	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;
e8386a0c	114
de5bd88d MH	115	/*
	116	* Indicates various status flags.
	117	* Protected by kprobe_mutex after this kprobe is registered.
	118	*/
e8386a0c	119	u32 flags;
1da177e4 LT	120	};
1da177e4 LT	121
e8386a0c MH	122	/* Kprobe status flags */
e8386a0c MH	123	#define KPROBE_FLAG_GONE 1 /* breakpoint has already gone */
de5bd88d	124	#define KPROBE_FLAG_DISABLED 2 /* probe is temporarily disabled */
e8386a0c	125
de5bd88d	126	/* Has this kprobe gone ? */
e8386a0c MH	127	static inline int kprobe_gone(struct kprobe *p)
	128	{
	129	return p->flags & KPROBE_FLAG_GONE;
	130	}
	131
de5bd88d MH	132	/* Is this kprobe disabled ? */
	133	static inline int kprobe_disabled(struct kprobe *p)
	134	{
	135	return p->flags & (KPROBE_FLAG_DISABLED \| KPROBE_FLAG_GONE);
	136	}
1da177e4 LT	137	/*
	138	* Special probe type that uses setjmp-longjmp type tricks to resume
	139	* execution at a specified entry with a matching prototype corresponding
	140	* to the probed function - a trick to enable arguments to become
	141	* accessible seamlessly by probe handling logic.
	142	* Note:
	143	* Because of the way compilers allocate stack space for local variables
	144	* etc upfront, regardless of sub-scopes within a function, this mirroring
	145	* principle currently works only for probes placed on function entry points.
	146	*/
	147	struct jprobe {
	148	struct kprobe kp;
81eae375	149	void entry; / probe handling code to jump to */
1da177e4 LT	150	};
1da177e4 LT	151
9e367d85 ME	152	/* For backward compatibility with old code using JPROBE_ENTRY() */
	153	#define JPROBE_ENTRY(handler) (handler)
	154
b94cce92 HN	155	/*
	156	* Function-return probe -
	157	* Note:
	158	* User needs to provide a handler function, and initialize maxactive.
	159	* maxactive - The maximum number of instances of the probed function that
	160	* can be active concurrently.
	161	* nmissed - tracks the number of times the probed function's return was
	162	* ignored, due to maxactive being too low.
	163	*
	164	*/
	165	struct kretprobe {
	166	struct kprobe kp;
	167	kretprobe_handler_t handler;
f47cd9b5	168	kretprobe_handler_t entry_handler;
b94cce92 HN	169	int maxactive;
b94cce92 HN	170	int nmissed;
f47cd9b5	171	size_t data_size;
b94cce92	172	struct hlist_head free_instances;
ef53d9c5	173	spinlock_t lock;
b94cce92 HN	174	};
	175
	176	struct kretprobe_instance {
b94cce92 HN	177	struct hlist_node hlist;
b94cce92 HN	178	struct kretprobe *rp;
802eae7c RL	179	kprobe_opcode_t *ret_addr;
802eae7c RL	180	struct task_struct *task;
f47cd9b5	181	char data[0];
b94cce92 HN	182	};
b94cce92 HN	183
f438d914 MH	184	struct kretprobe_blackpoint {
	185	const char *name;
	186	void *addr;
	187	};
3d8d996e SD	188
	189	struct kprobe_blackpoint {
	190	const char *name;
	191	unsigned long start_addr;
	192	unsigned long range;
	193	};
	194
dc19835d MH	195	#ifdef CONFIG_KPROBES
	196	DECLARE_PER_CPU(struct kprobe *, current_kprobe);
	197	DECLARE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);
	198
b1801812 IM	199	/*
	200	* For #ifdef avoidance:
	201	*/
	202	static inline int kprobes_built_in(void)
	203	{
	204	return 1;
	205	}
	206
dc19835d MH	207	#ifdef CONFIG_KRETPROBES
	208	extern void arch_prepare_kretprobe(struct kretprobe_instance *ri,
	209	struct pt_regs *regs);
	210	extern int arch_trampoline_kprobe(struct kprobe *p);
	211	#else /* CONFIG_KRETPROBES */
	212	static inline void arch_prepare_kretprobe(struct kretprobe *rp,
	213	struct pt_regs *regs)
	214	{
	215	}
	216	static inline int arch_trampoline_kprobe(struct kprobe *p)
	217	{
	218	return 0;
	219	}
	220	#endif /* CONFIG_KRETPROBES */
	221
f438d914 MH	222	extern struct kretprobe_blackpoint kretprobe_blacklist[];
f438d914 MH	223
0f95b7fc AM	224	static inline void kretprobe_assert(struct kretprobe_instance *ri,
	225	unsigned long orig_ret_address, unsigned long trampoline_address)
	226	{
	227	if (!orig_ret_address \|\| (orig_ret_address == trampoline_address)) {
	228	printk("kretprobe BUG!: Processing kretprobe %p @ %p\n",
	229	ri->rp, ri->rp->kp.addr);
	230	BUG();
	231	}
	232	}
	233
8c1c9356 AM	234	#ifdef CONFIG_KPROBES_SANITY_TEST
	235	extern int init_test_probes(void);
	236	#else
	237	static inline int init_test_probes(void)
	238	{
	239	return 0;
	240	}
	241	#endif /* CONFIG_KPROBES_SANITY_TEST */
	242
1da177e4	243	extern int arch_prepare_kprobe(struct kprobe *p);
7e1048b1 RL	244	extern void arch_arm_kprobe(struct kprobe *p);
7e1048b1 RL	245	extern void arch_disarm_kprobe(struct kprobe *p);
6772926b	246	extern int arch_init_kprobes(void);
1da177e4	247	extern void show_registers(struct pt_regs *regs);
9ec4b1f3	248	extern kprobe_opcode_t *get_insn_slot(void);
b4c6c34a	249	extern void free_insn_slot(kprobe_opcode_t *slot, int dirty);
bf8d5c52	250	extern void kprobes_inc_nmissed_count(struct kprobe *p);
1da177e4	251
d217d545	252	/* Get the kprobe at this addr (if any) - called with preemption disabled */
1da177e4	253	struct kprobe get_kprobe(void addr);
ef53d9c5 S	254	void kretprobe_hash_lock(struct task_struct *tsk,
	255	struct hlist_head *head, unsigned long flags);
	256	void kretprobe_hash_unlock(struct task_struct tsk, unsigned long flags);
b94cce92	257	struct hlist_head * kretprobe_inst_table_head(struct task_struct *tsk);
1da177e4	258
e6584523 AM	259	/* kprobe_running() will just return the current_kprobe on this CPU */
	260	static inline struct kprobe *kprobe_running(void)
	261	{
	262	return (__get_cpu_var(current_kprobe));
	263	}
	264
	265	static inline void reset_current_kprobe(void)
	266	{
	267	__get_cpu_var(current_kprobe) = NULL;
	268	}
	269
	270	static inline struct kprobe_ctlblk *get_kprobe_ctlblk(void)
	271	{
	272	return (&__get_cpu_var(kprobe_ctlblk));
	273	}
	274
1da177e4 LT	275	int register_kprobe(struct kprobe *p);
1da177e4 LT	276	void unregister_kprobe(struct kprobe *p);
9861668f MH	277	int register_kprobes(struct kprobe **kps, int num);
9861668f MH	278	void unregister_kprobes(struct kprobe **kps, int num);
1da177e4 LT	279	int setjmp_pre_handler(struct kprobe , struct pt_regs );
	280	int longjmp_break_handler(struct kprobe , struct pt_regs );
	281	int register_jprobe(struct jprobe *p);
	282	void unregister_jprobe(struct jprobe *p);
26b31c19 MH	283	int register_jprobes(struct jprobe **jps, int num);
26b31c19 MH	284	void unregister_jprobes(struct jprobe **jps, int num);
1da177e4	285	void jprobe_return(void);
3d7e3382	286	unsigned long arch_deref_entry_point(void *);
1da177e4	287
b94cce92 HN	288	int register_kretprobe(struct kretprobe *rp);
b94cce92 HN	289	void unregister_kretprobe(struct kretprobe *rp);
4a296e07 MH	290	int register_kretprobes(struct kretprobe **rps, int num);
4a296e07 MH	291	void unregister_kretprobes(struct kretprobe **rps, int num);
b94cce92	292
b94cce92	293	void kprobe_flush_task(struct task_struct *tk);
99219a3f	294	void recycle_rp_inst(struct kretprobe_instance ri, struct hlist_head head);
8c1c9356	295
de5bd88d MH	296	int disable_kprobe(struct kprobe *kp);
	297	int enable_kprobe(struct kprobe *kp);
	298
b1801812	299	#else /* !CONFIG_KPROBES: */
00d7c05a	300
b1801812 IM	301	static inline int kprobes_built_in(void)
	302	{
	303	return 0;
	304	}
	305	static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
	306	{
	307	return 0;
	308	}
785656a4 AS	309	static inline struct kprobe get_kprobe(void addr)
	310	{
	311	return NULL;
	312	}
e6584523	313	static inline struct kprobe *kprobe_running(void)
1da177e4	314	{
e6584523	315	return NULL;
1da177e4 LT	316	}
	317	static inline int register_kprobe(struct kprobe *p)
	318	{
	319	return -ENOSYS;
	320	}
9861668f MH	321	static inline int register_kprobes(struct kprobe **kps, int num)
	322	{
	323	return -ENOSYS;
	324	}
1da177e4 LT	325	static inline void unregister_kprobe(struct kprobe *p)
	326	{
	327	}
9861668f MH	328	static inline void unregister_kprobes(struct kprobe **kps, int num)
	329	{
	330	}
1da177e4 LT	331	static inline int register_jprobe(struct jprobe *p)
	332	{
	333	return -ENOSYS;
	334	}
26b31c19 MH	335	static inline int register_jprobes(struct jprobe **jps, int num)
	336	{
	337	return -ENOSYS;
	338	}
1da177e4 LT	339	static inline void unregister_jprobe(struct jprobe *p)
	340	{
	341	}
26b31c19 MH	342	static inline void unregister_jprobes(struct jprobe **jps, int num)
	343	{
	344	}
1da177e4 LT	345	static inline void jprobe_return(void)
	346	{
	347	}
b94cce92 HN	348	static inline int register_kretprobe(struct kretprobe *rp)
	349	{
	350	return -ENOSYS;
	351	}
4a296e07 MH	352	static inline int register_kretprobes(struct kretprobe **rps, int num)
	353	{
	354	return -ENOSYS;
	355	}
b94cce92 HN	356	static inline void unregister_kretprobe(struct kretprobe *rp)
	357	{
	358	}
4a296e07 MH	359	static inline void unregister_kretprobes(struct kretprobe **rps, int num)
	360	{
	361	}
b94cce92 HN	362	static inline void kprobe_flush_task(struct task_struct *tk)
	363	{
	364	}
de5bd88d MH	365	static inline int disable_kprobe(struct kprobe *kp)
	366	{
	367	return -ENOSYS;
	368	}
	369	static inline int enable_kprobe(struct kprobe *kp)
	370	{
	371	return -ENOSYS;
	372	}
b1801812 IM	373	#endif /* CONFIG_KPROBES */
b1801812 IM	374	#endif /* _LINUX_KPROBES_H */