[linux-2.6-block.git] / kernel / trace / trace_probe.h

// SPDX-License-Identifier: GPL-2.0
/*
 * Common header file for probe-based Dynamic events.
 *
 * This code was copied from kernel/trace/trace_kprobe.h written by
 * Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
 *
 * Updates to make this generic:
 * Copyright (C) IBM Corporation, 2010-2011
 * Author:     Srikar Dronamraju
 */

#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/tracefs.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/ptrace.h>
#include <linux/perf_event.h>
#include <linux/kprobes.h>
#include <linux/stringify.h>
#include <linux/limits.h>
#include <linux/uaccess.h>
#include <asm/bitsperlong.h>

#include "trace.h"
#include "trace_output.h"

#define MAX_TRACE_ARGS		128
#define MAX_ARGSTR_LEN		63
#define MAX_ARRAY_LEN		64
#define MAX_STRING_SIZE		PATH_MAX

/* Reserved field names */
#define FIELD_STRING_IP		"__probe_ip"
#define FIELD_STRING_RETIP	"__probe_ret_ip"
#define FIELD_STRING_FUNC	"__probe_func"

#undef DEFINE_FIELD
#define DEFINE_FIELD(type, item, name, is_signed)			\
	do {								\
		ret = trace_define_field(event_call, #type, name,	\
					 offsetof(typeof(field), item),	\
					 sizeof(field.item), is_signed, \
					 FILTER_OTHER);			\
		if (ret)						\
			return ret;					\
	} while (0)


/* Flags for trace_probe */
#define TP_FLAG_TRACE		1
#define TP_FLAG_PROFILE		2
#define TP_FLAG_REGISTERED	4

/* data_loc: data location, compatible with u32 */
#define make_data_loc(len, offs)	\
	(((u32)(len) << 16) | ((u32)(offs) & 0xffff))
#define get_loc_len(dl)		((u32)(dl) >> 16)
#define get_loc_offs(dl)	((u32)(dl) & 0xffff)

static nokprobe_inline void *get_loc_data(u32 *dl, void *ent)
{
	return (u8 *)ent + get_loc_offs(*dl);
}

static nokprobe_inline u32 update_data_loc(u32 loc, int consumed)
{
	u32 maxlen = get_loc_len(loc);
	u32 offset = get_loc_offs(loc);

	return make_data_loc(maxlen - consumed, offset + consumed);
}

/* Printing function type */
typedef int (*print_type_func_t)(struct trace_seq *, void *, void *);

enum fetch_op {
	FETCH_OP_NOP = 0,
	// Stage 1 (load) ops
	FETCH_OP_REG,		/* Register : .param = offset */
	FETCH_OP_STACK,		/* Stack : .param = index */
	FETCH_OP_STACKP,	/* Stack pointer */
	FETCH_OP_RETVAL,	/* Return value */
	FETCH_OP_IMM,		/* Immediate : .immediate */
	FETCH_OP_COMM,		/* Current comm */
	FETCH_OP_FOFFS,		/* File offset: .immediate */
	// Stage 2 (dereference) op
	FETCH_OP_DEREF,		/* Dereference: .offset */
	// Stage 3 (store) ops
	FETCH_OP_ST_RAW,	/* Raw: .size */
	FETCH_OP_ST_MEM,	/* Mem: .offset, .size */
	FETCH_OP_ST_STRING,	/* String: .offset, .size */
	// Stage 4 (modify) op
	FETCH_OP_MOD_BF,	/* Bitfield: .basesize, .lshift, .rshift */
	// Stage 5 (loop) op
	FETCH_OP_LP_ARRAY,	/* Array: .param = loop count */
	FETCH_OP_END,
};

struct fetch_insn {
	enum fetch_op op;
	union {
		unsigned int param;
		struct {
			unsigned int size;
			int offset;
		};
		struct {
			unsigned char basesize;
			unsigned char lshift;
			unsigned char rshift;
		};
		unsigned long immediate;
	};
};

/* fetch + deref*N + store + mod + end <= 16, this allows N=12, enough */
#define FETCH_INSN_MAX	16

/* Fetch type information table */
struct fetch_type {
	const char		*name;		/* Name of type */
	size_t			size;		/* Byte size of type */
	int			is_signed;	/* Signed flag */
	print_type_func_t	print;		/* Print functions */
	const char		*fmt;		/* Fromat string */
	const char		*fmttype;	/* Name in format file */
};

/* For defining macros, define string/string_size types */
typedef u32 string;
typedef u32 string_size;

#define PRINT_TYPE_FUNC_NAME(type)	print_type_##type
#define PRINT_TYPE_FMT_NAME(type)	print_type_format_##type

/* Printing  in basic type function template */
#define DECLARE_BASIC_PRINT_TYPE_FUNC(type)				\
int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, void *data, void *ent);\
extern const char PRINT_TYPE_FMT_NAME(type)[]

DECLARE_BASIC_PRINT_TYPE_FUNC(u8);
DECLARE_BASIC_PRINT_TYPE_FUNC(u16);
DECLARE_BASIC_PRINT_TYPE_FUNC(u32);
DECLARE_BASIC_PRINT_TYPE_FUNC(u64);
DECLARE_BASIC_PRINT_TYPE_FUNC(s8);
DECLARE_BASIC_PRINT_TYPE_FUNC(s16);
DECLARE_BASIC_PRINT_TYPE_FUNC(s32);
DECLARE_BASIC_PRINT_TYPE_FUNC(s64);
DECLARE_BASIC_PRINT_TYPE_FUNC(x8);
DECLARE_BASIC_PRINT_TYPE_FUNC(x16);
DECLARE_BASIC_PRINT_TYPE_FUNC(x32);
DECLARE_BASIC_PRINT_TYPE_FUNC(x64);

DECLARE_BASIC_PRINT_TYPE_FUNC(string);
DECLARE_BASIC_PRINT_TYPE_FUNC(symbol);

/* Default (unsigned long) fetch type */
#define __DEFAULT_FETCH_TYPE(t) x##t
#define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t)
#define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG)
#define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE)

#define __ADDR_FETCH_TYPE(t) u##t
#define _ADDR_FETCH_TYPE(t) __ADDR_FETCH_TYPE(t)
#define ADDR_FETCH_TYPE _ADDR_FETCH_TYPE(BITS_PER_LONG)

#define __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype)	\
	{.name = _name,				\
	 .size = _size,					\
	 .is_signed = sign,				\
	 .print = PRINT_TYPE_FUNC_NAME(ptype),		\
	 .fmt = PRINT_TYPE_FMT_NAME(ptype),		\
	 .fmttype = _fmttype,				\
	}
#define _ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype)	\
	__ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, #_fmttype)
#define ASSIGN_FETCH_TYPE(ptype, ftype, sign)			\
	_ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, ptype)

/* If ptype is an alias of atype, use this macro (show atype in format) */
#define ASSIGN_FETCH_TYPE_ALIAS(ptype, atype, ftype, sign)		\
	_ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, atype)

#define ASSIGN_FETCH_TYPE_END {}
#define MAX_ARRAY_LEN	64

#ifdef CONFIG_KPROBE_EVENTS
bool trace_kprobe_on_func_entry(struct trace_event_call *call);
bool trace_kprobe_error_injectable(struct trace_event_call *call);
#else
static inline bool trace_kprobe_on_func_entry(struct trace_event_call *call)
{
	return false;
}

static inline bool trace_kprobe_error_injectable(struct trace_event_call *call)
{
	return false;
}
#endif /* CONFIG_KPROBE_EVENTS */

struct probe_arg {
	struct fetch_insn	*code;
	bool			dynamic;/* Dynamic array (string) is used */
	unsigned int		offset;	/* Offset from argument entry */
	unsigned int		count;	/* Array count */
	const char		*name;	/* Name of this argument */
	const char		*comm;	/* Command of this argument */
	char			*fmt;	/* Format string if needed */
	const struct fetch_type	*type;	/* Type of this argument */
};

struct trace_probe {
	unsigned int			flags;	/* For TP_FLAG_* */
	struct trace_event_class	class;
	struct trace_event_call		call;
	struct list_head 		files;
	ssize_t				size;	/* trace entry size */
	unsigned int			nr_args;
	struct probe_arg		args[];
};

struct event_file_link {
	struct trace_event_file		*file;
	struct list_head		list;
};

static inline bool trace_probe_is_enabled(struct trace_probe *tp)
{
	return !!(tp->flags & (TP_FLAG_TRACE | TP_FLAG_PROFILE));
}

static inline bool trace_probe_is_registered(struct trace_probe *tp)
{
	return !!(tp->flags & TP_FLAG_REGISTERED);
}

/* Check the name is good for event/group/fields */
static inline bool is_good_name(const char *name)
{
	if (!isalpha(*name) && *name != '_')
		return false;
	while (*++name != '\0') {
		if (!isalpha(*name) && !isdigit(*name) && *name != '_')
			return false;
	}
	return true;
}

static inline struct event_file_link *
find_event_file_link(struct trace_probe *tp, struct trace_event_file *file)
{
	struct event_file_link *link;

	list_for_each_entry(link, &tp->files, list)
		if (link->file == file)
			return link;

	return NULL;
}

extern int traceprobe_parse_probe_arg(char *arg, ssize_t *size,
		   struct probe_arg *parg, bool is_return, bool is_kprobe);

extern int traceprobe_conflict_field_name(const char *name,
			       struct probe_arg *args, int narg);

extern void traceprobe_update_arg(struct probe_arg *arg);
extern void traceprobe_free_probe_arg(struct probe_arg *arg);

extern int traceprobe_split_symbol_offset(char *symbol, long *offset);

extern int traceprobe_set_print_fmt(struct trace_probe *tp, bool is_return);

#ifdef CONFIG_PERF_EVENTS
extern struct trace_event_call *
create_local_trace_kprobe(char *func, void *addr, unsigned long offs,
			  bool is_return);
extern void destroy_local_trace_kprobe(struct trace_event_call *event_call);

extern struct trace_event_call *
create_local_trace_uprobe(char *name, unsigned long offs,
			  unsigned long ref_ctr_offset, bool is_return);
extern void destroy_local_trace_uprobe(struct trace_event_call *event_call);
#endif
extern int traceprobe_define_arg_fields(struct trace_event_call *event_call,
					size_t offset, struct trace_probe *tp);
Commit	Line	Data
bcea3f96	1	// SPDX-License-Identifier: GPL-2.0
8ab83f56 SD	2	/*
	3	* Common header file for probe-based Dynamic events.
	4	*
8ab83f56 SD	5	* This code was copied from kernel/trace/trace_kprobe.h written by
	6	* Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
	7	*
	8	* Updates to make this generic:
	9	* Copyright (C) IBM Corporation, 2010-2011
	10	* Author: Srikar Dronamraju
	11	*/
	12
	13	#include <linux/seq_file.h>
	14	#include <linux/slab.h>
	15	#include <linux/smp.h>
8434dc93	16	#include <linux/tracefs.h>
8ab83f56 SD	17	#include <linux/types.h>
	18	#include <linux/string.h>
	19	#include <linux/ctype.h>
	20	#include <linux/ptrace.h>
	21	#include <linux/perf_event.h>
	22	#include <linux/kprobes.h>
	23	#include <linux/stringify.h>
	24	#include <linux/limits.h>
	25	#include <linux/uaccess.h>
	26	#include <asm/bitsperlong.h>
	27
	28	#include "trace.h"
	29	#include "trace_output.h"
	30
	31	#define MAX_TRACE_ARGS 128
	32	#define MAX_ARGSTR_LEN 63
40b53b77	33	#define MAX_ARRAY_LEN 64
8ab83f56 SD	34	#define MAX_STRING_SIZE PATH_MAX
	35
	36	/* Reserved field names */
	37	#define FIELD_STRING_IP "__probe_ip"
	38	#define FIELD_STRING_RETIP "__probe_ret_ip"
	39	#define FIELD_STRING_FUNC "__probe_func"
	40
	41	#undef DEFINE_FIELD
	42	#define DEFINE_FIELD(type, item, name, is_signed) \
	43	do { \
	44	ret = trace_define_field(event_call, #type, name, \
	45	offsetof(typeof(field), item), \
	46	sizeof(field.item), is_signed, \
	47	FILTER_OTHER); \
	48	if (ret) \
	49	return ret; \
	50	} while (0)
	51
	52
	53	/* Flags for trace_probe */
	54	#define TP_FLAG_TRACE 1
	55	#define TP_FLAG_PROFILE 2
	56	#define TP_FLAG_REGISTERED 4
	57
9178412d MH	58	/* data_loc: data location, compatible with u32 */
	59	#define make_data_loc(len, offs) \
	60	(((u32)(len) << 16) \| ((u32)(offs) & 0xffff))
	61	#define get_loc_len(dl) ((u32)(dl) >> 16)
	62	#define get_loc_offs(dl) ((u32)(dl) & 0xffff)
8ab83f56	63
3da0f180	64	static nokprobe_inline void get_loc_data(u32 dl, void *ent)
b26c74e1	65	{
9178412d	66	return (u8 )ent + get_loc_offs(dl);
b26c74e1 NK	67	}
b26c74e1 NK	68
40b53b77 MH	69	static nokprobe_inline u32 update_data_loc(u32 loc, int consumed)
	70	{
	71	u32 maxlen = get_loc_len(loc);
	72	u32 offset = get_loc_offs(loc);
	73
	74	return make_data_loc(maxlen - consumed, offset + consumed);
	75	}
	76
8ab83f56	77	/* Printing function type */
56de7630	78	typedef int (print_type_func_t)(struct trace_seq , void , void );
8ab83f56	79
53305928 MH	80	enum fetch_op {
	81	FETCH_OP_NOP = 0,
	82	// Stage 1 (load) ops
	83	FETCH_OP_REG, /* Register : .param = offset */
	84	FETCH_OP_STACK, /* Stack : .param = index */
	85	FETCH_OP_STACKP, /* Stack pointer */
	86	FETCH_OP_RETVAL, /* Return value */
	87	FETCH_OP_IMM, /* Immediate : .immediate */
	88	FETCH_OP_COMM, /* Current comm */
	89	FETCH_OP_FOFFS, /* File offset: .immediate */
	90	// Stage 2 (dereference) op
	91	FETCH_OP_DEREF, /* Dereference: .offset */
	92	// Stage 3 (store) ops
	93	FETCH_OP_ST_RAW, /* Raw: .size */
	94	FETCH_OP_ST_MEM, /* Mem: .offset, .size */
	95	FETCH_OP_ST_STRING, /* String: .offset, .size */
	96	// Stage 4 (modify) op
	97	FETCH_OP_MOD_BF, /* Bitfield: .basesize, .lshift, .rshift */
40b53b77 MH	98	// Stage 5 (loop) op
40b53b77 MH	99	FETCH_OP_LP_ARRAY, /* Array: .param = loop count */
53305928	100	FETCH_OP_END,
8ab83f56 SD	101	};
8ab83f56 SD	102
53305928 MH	103	struct fetch_insn {
	104	enum fetch_op op;
	105	union {
	106	unsigned int param;
	107	struct {
	108	unsigned int size;
	109	int offset;
	110	};
	111	struct {
	112	unsigned char basesize;
	113	unsigned char lshift;
	114	unsigned char rshift;
	115	};
	116	unsigned long immediate;
	117	};
	118	};
	119
	120	/* fetch + derefN + store + mod + end <= 16, this allows N=12, enough /
	121	#define FETCH_INSN_MAX 16
	122
8ab83f56 SD	123	/* Fetch type information table */
	124	struct fetch_type {
	125	const char name; / Name of type */
	126	size_t size; /* Byte size of type */
	127	int is_signed; /* Signed flag */
	128	print_type_func_t print; /* Print functions */
	129	const char fmt; / Fromat string */
	130	const char fmttype; / Name in format file */
8ab83f56 SD	131	};
8ab83f56 SD	132
34fee3a1 NK	133	/* For defining macros, define string/string_size types */
	134	typedef u32 string;
	135	typedef u32 string_size;
	136
b26c74e1 NK	137	#define PRINT_TYPE_FUNC_NAME(type) print_type_##type
	138	#define PRINT_TYPE_FMT_NAME(type) print_type_format_##type
	139
	140	/* Printing in basic type function template */
	141	#define DECLARE_BASIC_PRINT_TYPE_FUNC(type) \
56de7630	142	int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq s, void data, void *ent);\
b26c74e1 NK	143	extern const char PRINT_TYPE_FMT_NAME(type)[]
	144
	145	DECLARE_BASIC_PRINT_TYPE_FUNC(u8);
	146	DECLARE_BASIC_PRINT_TYPE_FUNC(u16);
	147	DECLARE_BASIC_PRINT_TYPE_FUNC(u32);
	148	DECLARE_BASIC_PRINT_TYPE_FUNC(u64);
	149	DECLARE_BASIC_PRINT_TYPE_FUNC(s8);
	150	DECLARE_BASIC_PRINT_TYPE_FUNC(s16);
	151	DECLARE_BASIC_PRINT_TYPE_FUNC(s32);
	152	DECLARE_BASIC_PRINT_TYPE_FUNC(s64);
17ce3dc7 MH	153	DECLARE_BASIC_PRINT_TYPE_FUNC(x8);
	154	DECLARE_BASIC_PRINT_TYPE_FUNC(x16);
	155	DECLARE_BASIC_PRINT_TYPE_FUNC(x32);
	156	DECLARE_BASIC_PRINT_TYPE_FUNC(x64);
	157
b26c74e1	158	DECLARE_BASIC_PRINT_TYPE_FUNC(string);
60c2e0ce	159	DECLARE_BASIC_PRINT_TYPE_FUNC(symbol);
b26c74e1 NK	160
b26c74e1 NK	161	/* Default (unsigned long) fetch type */
bdca79c2	162	#define __DEFAULT_FETCH_TYPE(t) x##t
b26c74e1 NK	163	#define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t)
	164	#define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG)
	165	#define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE)
	166
60c2e0ce MH	167	#define __ADDR_FETCH_TYPE(t) u##t
	168	#define _ADDR_FETCH_TYPE(t) __ADDR_FETCH_TYPE(t)
	169	#define ADDR_FETCH_TYPE _ADDR_FETCH_TYPE(BITS_PER_LONG)
	170
b26c74e1 NK	171	#define __ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype) \
	172	{.name = _name, \
	173	.size = _size, \
	174	.is_signed = sign, \
	175	.print = PRINT_TYPE_FUNC_NAME(ptype), \
	176	.fmt = PRINT_TYPE_FMT_NAME(ptype), \
	177	.fmttype = _fmttype, \
b26c74e1	178	}
60c2e0ce MH	179	#define _ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, _fmttype) \
60c2e0ce MH	180	__ASSIGN_FETCH_TYPE(_name, ptype, ftype, _size, sign, #_fmttype)
b26c74e1	181	#define ASSIGN_FETCH_TYPE(ptype, ftype, sign) \
60c2e0ce	182	_ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, ptype)
b26c74e1	183
17ce3dc7 MH	184	/* If ptype is an alias of atype, use this macro (show atype in format) */
17ce3dc7 MH	185	#define ASSIGN_FETCH_TYPE_ALIAS(ptype, atype, ftype, sign) \
60c2e0ce	186	_ASSIGN_FETCH_TYPE(#ptype, ptype, ftype, sizeof(ftype), sign, atype)
17ce3dc7	187
34fee3a1	188	#define ASSIGN_FETCH_TYPE_END {}
40b53b77	189	#define MAX_ARRAY_LEN 64
34fee3a1	190
6b0b7551	191	#ifdef CONFIG_KPROBE_EVENTS
b4da3340 MH	192	bool trace_kprobe_on_func_entry(struct trace_event_call *call);
b4da3340 MH	193	bool trace_kprobe_error_injectable(struct trace_event_call *call);
1301a44e	194	#else
b4da3340	195	static inline bool trace_kprobe_on_func_entry(struct trace_event_call *call)
9802d865	196	{
b4da3340	197	return false;
9802d865 JB	198	}
9802d865 JB	199
b4da3340	200	static inline bool trace_kprobe_error_injectable(struct trace_event_call *call)
9802d865	201	{
b4da3340	202	return false;
9802d865	203	}
6b0b7551	204	#endif /* CONFIG_KPROBE_EVENTS */
1301a44e	205
8ab83f56	206	struct probe_arg {
53305928 MH	207	struct fetch_insn *code;
53305928 MH	208	bool dynamic;/* Dynamic array (string) is used */
8ab83f56	209	unsigned int offset; /* Offset from argument entry */
40b53b77	210	unsigned int count; /* Array count */
8ab83f56 SD	211	const char name; / Name of this argument */
8ab83f56 SD	212	const char comm; / Command of this argument */
40b53b77	213	char fmt; / Format string if needed */
8ab83f56 SD	214	const struct fetch_type type; / Type of this argument */
	215	};
	216
c31ffb3f NK	217	struct trace_probe {
c31ffb3f NK	218	unsigned int flags; /* For TP_FLAG_* */
2425bcb9 SRRH	219	struct trace_event_class class;
2425bcb9 SRRH	220	struct trace_event_call call;
c31ffb3f NK	221	struct list_head files;
	222	ssize_t size; /* trace entry size */
	223	unsigned int nr_args;
	224	struct probe_arg args[];
	225	};
	226
70ed91c6	227	struct event_file_link {
7f1d2f82	228	struct trace_event_file *file;
70ed91c6 J	229	struct list_head list;
	230	};
	231
c31ffb3f NK	232	static inline bool trace_probe_is_enabled(struct trace_probe *tp)
	233	{
	234	return !!(tp->flags & (TP_FLAG_TRACE \| TP_FLAG_PROFILE));
	235	}
	236
	237	static inline bool trace_probe_is_registered(struct trace_probe *tp)
	238	{
	239	return !!(tp->flags & TP_FLAG_REGISTERED);
	240	}
	241
8ab83f56	242	/* Check the name is good for event/group/fields */
f0132c4e	243	static inline bool is_good_name(const char *name)
8ab83f56 SD	244	{
8ab83f56 SD	245	if (!isalpha(name) && name != '_')
f0132c4e	246	return false;
8ab83f56 SD	247	while (*++name != '\0') {
8ab83f56 SD	248	if (!isalpha(name) && !isdigit(name) && *name != '_')
f0132c4e	249	return false;
8ab83f56	250	}
f0132c4e	251	return true;
8ab83f56 SD	252	}
8ab83f56 SD	253
70ed91c6	254	static inline struct event_file_link *
7f1d2f82	255	find_event_file_link(struct trace_probe tp, struct trace_event_file file)
70ed91c6 J	256	{
	257	struct event_file_link *link;
	258
	259	list_for_each_entry(link, &tp->files, list)
	260	if (link->file == file)
	261	return link;
	262
	263	return NULL;
	264	}
	265
8ab83f56	266	extern int traceprobe_parse_probe_arg(char arg, ssize_t size,
f451bc89	267	struct probe_arg *parg, bool is_return, bool is_kprobe);
8ab83f56 SD	268
	269	extern int traceprobe_conflict_field_name(const char *name,
	270	struct probe_arg *args, int narg);
	271
	272	extern void traceprobe_update_arg(struct probe_arg *arg);
	273	extern void traceprobe_free_probe_arg(struct probe_arg *arg);
	274
c5d343b6	275	extern int traceprobe_split_symbol_offset(char symbol, long offset);
8ab83f56	276
0a46c854	277	extern int traceprobe_set_print_fmt(struct trace_probe *tp, bool is_return);
e12f03d7 SL	278
	279	#ifdef CONFIG_PERF_EVENTS
	280	extern struct trace_event_call *
	281	create_local_trace_kprobe(char func, void addr, unsigned long offs,
	282	bool is_return);
	283	extern void destroy_local_trace_kprobe(struct trace_event_call *event_call);
33ea4b24 SL	284
33ea4b24 SL	285	extern struct trace_event_call *
a6ca88b2 SL	286	create_local_trace_uprobe(char *name, unsigned long offs,
a6ca88b2 SL	287	unsigned long ref_ctr_offset, bool is_return);
33ea4b24	288	extern void destroy_local_trace_uprobe(struct trace_event_call *event_call);
e12f03d7	289	#endif
eeb07b06 MH	290	extern int traceprobe_define_arg_fields(struct trace_event_call *event_call,
eeb07b06 MH	291	size_t offset, struct trace_probe *tp);