1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright 2006-2008 John Birrell <jb@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * Statically Defined Tracing (SDT) definitions.
28 *
29 */
30
31#ifndef _SYS_SDT_H
32#define	_SYS_SDT_H
33
34#ifndef _KERNEL
35
36#define	_DTRACE_VERSION	1
37
38#define	DTRACE_PROBE(prov, name) {				\
39	extern void __dtrace_##prov##___##name(void);		\
40	__dtrace_##prov##___##name();				\
41}
42
43#define	DTRACE_PROBE1(prov, name, arg1) {			\
44	extern void __dtrace_##prov##___##name(unsigned long);	\
45	__dtrace_##prov##___##name((unsigned long)arg1);	\
46}
47
48#define	DTRACE_PROBE2(prov, name, arg1, arg2) {			\
49	extern void __dtrace_##prov##___##name(unsigned long,	\
50	    unsigned long);					\
51	__dtrace_##prov##___##name((unsigned long)arg1,		\
52	    (unsigned long)arg2);				\
53}
54
55#define	DTRACE_PROBE3(prov, name, arg1, arg2, arg3) {		\
56	extern void __dtrace_##prov##___##name(unsigned long,	\
57	    unsigned long, unsigned long);			\
58	__dtrace_##prov##___##name((unsigned long)arg1,		\
59	    (unsigned long)arg2, (unsigned long)arg3);		\
60}
61
62#define	DTRACE_PROBE4(prov, name, arg1, arg2, arg3, arg4) {	\
63	extern void __dtrace_##prov##___##name(unsigned long,	\
64	    unsigned long, unsigned long, unsigned long);	\
65	__dtrace_##prov##___##name((unsigned long)arg1,		\
66	    (unsigned long)arg2, (unsigned long)arg3,		\
67	    (unsigned long)arg4);				\
68}
69
70#define	DTRACE_PROBE5(prov, name, arg1, arg2, arg3, arg4, arg5) {	\
71	extern void __dtrace_##prov##___##name(unsigned long,		\
72	    unsigned long, unsigned long, unsigned long, unsigned long);\
73	__dtrace_##prov##___##name((unsigned long)arg1,			\
74	    (unsigned long)arg2, (unsigned long)arg3,			\
75	    (unsigned long)arg4, (unsigned long)arg5);			\
76}
77
78#else /* _KERNEL */
79
80#include <sys/linker_set.h>
81#include <machine/sdt_machdep.h>
82
83extern volatile bool sdt_probes_enabled;
84
85#ifndef KDTRACE_HOOKS
86
87#define __sdt_used	__unused
88
89#define SDT_PROVIDER_DEFINE(prov)
90#define SDT_PROVIDER_DECLARE(prov)
91#define SDT_PROBE_DEFINE(prov, mod, func, name)
92#define SDT_PROBE_DECLARE(prov, mod, func, name)
93#define SDT_PROBES_ENABLED()	0
94#define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
95#define SDT_PROBE_ARGTYPE(prov, mod, func, name, num, type, xtype)
96
97#define	SDT_PROBE_DEFINE0(prov, mod, func, name)
98#define	SDT_PROBE_DEFINE1(prov, mod, func, name, arg0)
99#define	SDT_PROBE_DEFINE2(prov, mod, func, name, arg0, arg1)
100#define	SDT_PROBE_DEFINE3(prov, mod, func, name, arg0, arg1, arg2)
101#define	SDT_PROBE_DEFINE4(prov, mod, func, name, arg0, arg1, arg2, arg3)
102#define	SDT_PROBE_DEFINE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
103#define	SDT_PROBE_DEFINE6(prov, mod, func, name, arg0, arg1, arg2,      \
104    arg3, arg4, arg5)
105
106#define	SDT_PROBE0(prov, mod, func, name)
107#define	SDT_PROBE1(prov, mod, func, name, arg0)
108#define	SDT_PROBE2(prov, mod, func, name, arg0, arg1)
109#define	SDT_PROBE3(prov, mod, func, name, arg0, arg1, arg2)
110#define	SDT_PROBE4(prov, mod, func, name, arg0, arg1, arg2, arg3)
111#define	SDT_PROBE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
112#define	SDT_PROBE6(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4, arg5)
113
114#define	MIB_SDT_PROBE1(...)
115#define	MIB_SDT_PROBE2(...)
116
117#define	SDT_PROBE_DEFINE0_XLATE(prov, mod, func, name)
118#define	SDT_PROBE_DEFINE1_XLATE(prov, mod, func, name, arg0, xarg0)
119#define	SDT_PROBE_DEFINE2_XLATE(prov, mod, func, name, arg0, xarg0,     \
120    arg1, xarg1)
121#define	SDT_PROBE_DEFINE3_XLATE(prov, mod, func, name, arg0, xarg0,     \
122    arg1, xarg1, arg2, xarg2)
123#define SDT_PROBE_DEFINE4_XLATE(prov, mod, func, name, arg0, xarg0,     \
124    arg1, xarg1, arg2, xarg2, arg3, xarg3)
125#define	SDT_PROBE_DEFINE5_XLATE(prov, mod, func, name, arg0, xarg0,     \
126    arg1, xarg1, arg2, xarg2, arg3, xarg3, arg4, xarg4)
127#define	SDT_PROBE_DEFINE6_XLATE(prov, mod, func, name, arg0, xarg0,     \
128    arg1,  xarg1, arg2, xarg2, arg3, xarg3, arg4, xarg4, arg5, xarg5)
129
130#define	DTRACE_PROBE(name)
131#define	DTRACE_PROBE1(name, type0, arg0)
132#define	DTRACE_PROBE2(name, type0, arg0, type1, arg1)
133#define	DTRACE_PROBE3(name, type0, arg0, type1, arg1, type2, arg2)
134#define	DTRACE_PROBE4(name, type0, arg0, type1, arg1, type2, arg2, type3, arg3)
135#define	DTRACE_PROBE5(name, type0, arg0, type1, arg1, type2, arg2, type3, arg3,\
136    type4, arg4)
137
138#else
139
140void sdt_probe(uint32_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t,
141    uintptr_t);
142void sdt_probe6(uint32_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t,
143    uintptr_t, uintptr_t);
144
145#define	_SDT_TRACEPOINT_SET		sdt_tracepoint_set
146#define	_SDT_TRACEPOINT_SECTION		"set_sdt_tracepoint_set"
147
148bool sdt_tracepoint_valid(uintptr_t patchpoint, uintptr_t target);
149void sdt_tracepoint_patch(uintptr_t patchpoint, uintptr_t target);
150void sdt_tracepoint_restore(uintptr_t patchpoint);
151
152#define __sdt_used
153
154SET_DECLARE(sdt_providers_set, struct sdt_provider);
155SET_DECLARE(sdt_probes_set, struct sdt_probe);
156SET_DECLARE(sdt_argtypes_set, struct sdt_argtype);
157
158#define	_SDT_PROBE_NAME(prov, mod, func, name)				\
159	sdt_##prov##_##mod##_##func##_##name
160#define	_SDT_PROVIDER_NAME(prov)					\
161	sdt_provider_##prov
162
163#define SDT_PROVIDER_DEFINE(_prov)					\
164	struct sdt_provider _SDT_PROVIDER_NAME(_prov)[1] = {		\
165		[0] = { .name = #_prov },				\
166	};								\
167	DATA_SET(sdt_providers_set, _SDT_PROVIDER_NAME(_prov))
168
169#define SDT_PROVIDER_DECLARE(prov)					\
170	extern struct sdt_provider _SDT_PROVIDER_NAME(prov)[1]
171
172#define SDT_PROBE_DEFINE(_prov, _mod, _func, _name)			\
173	struct sdt_probe _SDT_PROBE_NAME(_prov, _mod, _func, _name)[1] = { \
174		[0] = {							\
175		    .version = sizeof(struct sdt_probe),		\
176		    .prov = _SDT_PROVIDER_NAME(_prov),			\
177		    .mod = #_mod,					\
178		    .func = #_func,					\
179		    .name = #_name,					\
180		},							\
181	};								\
182	DATA_SET(sdt_probes_set, _SDT_PROBE_NAME(_prov, _mod, _func, _name))
183
184#define SDT_PROBE_DECLARE(prov, mod, func, name)			\
185	extern struct sdt_probe _SDT_PROBE_NAME(prov, mod, func, name)[1]
186
187#define	SDT_PROBES_ENABLED()	__predict_false(sdt_probes_enabled)
188
189#ifdef _ILP32
190#define	_SDT_ASM_WORD			".long"
191#else
192#define	_SDT_ASM_WORD			".quad"
193#endif
194
195#ifndef _SDT_ASM_PROBE_CONSTRAINT
196#define	_SDT_ASM_PROBE_CONSTRAINT	"i"
197#endif
198#ifndef	_SDT_ASM_PROBE_OPERAND
199#define	_SDT_ASM_PROBE_OPERAND		"c"
200#endif
201
202/*
203 * The asm below generates records corresponding to the structure's layout, so
204 * the two must be kept in sync.
205 */
206struct sdt_tracepoint {
207	struct sdt_probe *probe;
208	uintptr_t	patchpoint;
209	uintptr_t	target;
210	STAILQ_ENTRY(sdt_tracepoint) tracepoint_entry;
211};
212
213#define __SDT_PROBE(prov, mod, func, name, uniq, f, ...) do {		\
214	__WEAK(__CONCAT(__start_set_, _SDT_TRACEPOINT_SET));		\
215	__WEAK(__CONCAT(__stop_set_, _SDT_TRACEPOINT_SET));		\
216	asm goto(							\
217	    "0:\n"							\
218	    _SDT_ASM_PATCH_INSTR "\n"					\
219	    ".pushsection " _SDT_TRACEPOINT_SECTION ", \"aw\"\n"	\
220	    _SDT_ASM_WORD " %" _SDT_ASM_PROBE_OPERAND "0\n"		\
221	    _SDT_ASM_WORD " 0b\n"					\
222	    _SDT_ASM_WORD " %l1\n"					\
223	    _SDT_ASM_WORD " 0\n"					\
224	    ".popsection\n"						\
225	    :								\
226	    : _SDT_ASM_PROBE_CONSTRAINT (_SDT_PROBE_NAME(prov, mod,	\
227	    func, name))						\
228	    :								\
229	    : __sdt_probe##uniq);					\
230	if (0) {							\
231__sdt_probe##uniq:;							\
232		f(_SDT_PROBE_NAME(prov, mod, func, name)->id, __VA_ARGS__); \
233	}								\
234} while (0)
235#define _SDT_PROBE(prov, mod, func, name, uniq, f, ...)			\
236	__SDT_PROBE(prov, mod, func, name, uniq, f, __VA_ARGS__)
237#define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)	\
238	_SDT_PROBE(prov, mod, func, name, __COUNTER__, sdt_probe,	\
239	    (uintptr_t)arg0, (uintptr_t)arg1, (uintptr_t)arg2,		\
240	    (uintptr_t)arg3, (uintptr_t)arg4)
241
242#define SDT_PROBE_ARGTYPE(_prov, _mod, _func, _name, _num, _type, _xtype) \
243	static struct sdt_argtype					\
244	    sdta_##_prov##_##_mod##_##_func##_##_name##_num[1] = {	\
245		[0] = {							\
246		    .ndx = _num,					\
247		    .type = _type,					\
248		    .xtype = _xtype,					\
249		    .probe = _SDT_PROBE_NAME(_prov, _mod, _func, _name), \
250		},							\
251	};								\
252	DATA_SET(sdt_argtypes_set,					\
253	    sdta_##_prov##_##_mod##_##_func##_##_name##_num);
254
255#define	SDT_PROBE_DEFINE0(prov, mod, func, name)			\
256	SDT_PROBE_DEFINE(prov, mod, func, name)
257
258#define	SDT_PROBE_DEFINE1(prov, mod, func, name, arg0)			\
259	SDT_PROBE_DEFINE(prov, mod, func, name);			\
260	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL)
261
262#define	SDT_PROBE_DEFINE2(prov, mod, func, name, arg0, arg1)		\
263	SDT_PROBE_DEFINE(prov, mod, func, name);			\
264	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);	\
265	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL)
266
267#define	SDT_PROBE_DEFINE3(prov, mod, func, name, arg0, arg1, arg2)\
268	SDT_PROBE_DEFINE(prov, mod, func, name);			\
269	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);	\
270	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL);	\
271	SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, NULL)
272
273#define	SDT_PROBE_DEFINE4(prov, mod, func, name, arg0, arg1, arg2, arg3) \
274	SDT_PROBE_DEFINE(prov, mod, func, name);			\
275	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);	\
276	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL);	\
277	SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, NULL);	\
278	SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, NULL)
279
280#define	SDT_PROBE_DEFINE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) \
281	SDT_PROBE_DEFINE(prov, mod, func, name);			\
282	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);	\
283	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL);	\
284	SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, NULL);	\
285	SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, NULL);	\
286	SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4, NULL)
287
288#define	SDT_PROBE_DEFINE6(prov, mod, func, name, arg0, arg1, arg2, arg3,\
289    arg4, arg5) \
290	SDT_PROBE_DEFINE(prov, mod, func, name);			\
291	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);	\
292	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL);	\
293	SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, NULL);	\
294	SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, NULL);	\
295	SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4, NULL);	\
296	SDT_PROBE_ARGTYPE(prov, mod, func, name, 5, arg5, NULL)
297
298#define	SDT_PROBE_DEFINE0_XLATE(prov, mod, func, name)		\
299	SDT_PROBE_DEFINE(prov, mod, func, name)
300
301#define	SDT_PROBE_DEFINE1_XLATE(prov, mod, func, name, arg0, xarg0) \
302	SDT_PROBE_DEFINE(prov, mod, func, name);			\
303	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0)
304
305#define	SDT_PROBE_DEFINE2_XLATE(prov, mod, func, name, arg0, xarg0, \
306    arg1,  xarg1)							\
307	SDT_PROBE_DEFINE(prov, mod, func, name);			\
308	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);	\
309	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1)
310
311#define	SDT_PROBE_DEFINE3_XLATE(prov, mod, func, name, arg0, xarg0, \
312    arg1, xarg1, arg2, xarg2)						\
313	SDT_PROBE_DEFINE(prov, mod, func, name);			\
314	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);	\
315	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1);	\
316	SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, xarg2)
317
318#define	SDT_PROBE_DEFINE4_XLATE(prov, mod, func, name, arg0, xarg0, \
319    arg1, xarg1, arg2, xarg2, arg3, xarg3)				\
320	SDT_PROBE_DEFINE(prov, mod, func, name);			\
321	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);	\
322	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1);	\
323	SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, xarg2);	\
324	SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, xarg3)
325
326#define	SDT_PROBE_DEFINE5_XLATE(prov, mod, func, name, arg0, xarg0, \
327    arg1, xarg1, arg2, xarg2, arg3, xarg3, arg4, xarg4)			\
328	SDT_PROBE_DEFINE(prov, mod, func, name);			\
329	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);	\
330	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1);	\
331	SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, xarg2);	\
332	SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, xarg3);	\
333	SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4, xarg4)
334
335#define	SDT_PROBE_DEFINE6_XLATE(prov, mod, func, name, arg0, xarg0, \
336    arg1, xarg1, arg2, xarg2, arg3, xarg3, arg4, xarg4, arg5, xarg5)	\
337	SDT_PROBE_DEFINE(prov, mod, func, name);			\
338	SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);	\
339	SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1);	\
340	SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, xarg2);	\
341	SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, xarg3);	\
342	SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4, xarg4);	\
343	SDT_PROBE_ARGTYPE(prov, mod, func, name, 5, arg5, xarg5)
344
345#define	SDT_PROBE0(prov, mod, func, name)				\
346	SDT_PROBE(prov, mod, func, name, 0, 0, 0, 0, 0)
347#define	SDT_PROBE1(prov, mod, func, name, arg0)				\
348	SDT_PROBE(prov, mod, func, name, arg0, 0, 0, 0, 0)
349#define	SDT_PROBE2(prov, mod, func, name, arg0, arg1)			\
350	SDT_PROBE(prov, mod, func, name, arg0, arg1, 0, 0, 0)
351#define	SDT_PROBE3(prov, mod, func, name, arg0, arg1, arg2)		\
352	SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2,  0, 0)
353#define	SDT_PROBE4(prov, mod, func, name, arg0, arg1, arg2, arg3)	\
354	SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, 0)
355#define	SDT_PROBE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) \
356	SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
357#define	SDT_PROBE6(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4, arg5) \
358	_SDT_PROBE(prov, mod, func, name, __COUNTER__, sdt_probe6,	\
359	    (uintptr_t)arg0, (uintptr_t)arg1, (uintptr_t)arg2,		\
360	    (uintptr_t)arg3, (uintptr_t)arg4, (uintptr_t)arg5)
361
362#ifndef KDTRACE_NO_MIB_SDT
363#define	MIB_SDT_PROBE1(...)	SDT_PROBE1(mib, __VA_ARGS__)
364#define	MIB_SDT_PROBE2(...)	SDT_PROBE2(mib, __VA_ARGS__)
365#else
366#define	MIB_SDT_PROBE1(...)
367#define	MIB_SDT_PROBE2(...)
368#endif
369
370#define	DTRACE_PROBE_IMPL_START(name, arg0, arg1, arg2, arg3, arg4)	do { \
371	static SDT_PROBE_DEFINE(sdt, , , name);				     \
372	SDT_PROBE(sdt, , , name, arg0, arg1, arg2, arg3, arg4);
373#define DTRACE_PROBE_IMPL_END	} while (0)
374
375#define DTRACE_PROBE(name)						\
376	DTRACE_PROBE_IMPL_START(name, 0, 0, 0, 0, 0)			\
377	DTRACE_PROBE_IMPL_END
378
379#define DTRACE_PROBE1(name, type0, arg0)				\
380	DTRACE_PROBE_IMPL_START(name, arg0, 0, 0, 0, 0) 		\
381	SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);		\
382	DTRACE_PROBE_IMPL_END
383
384#define DTRACE_PROBE2(name, type0, arg0, type1, arg1)			\
385	DTRACE_PROBE_IMPL_START(name, arg0, arg1, 0, 0, 0) 		\
386	SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);		\
387	SDT_PROBE_ARGTYPE(sdt, , , name, 1, #type1, NULL);		\
388	DTRACE_PROBE_IMPL_END
389
390#define DTRACE_PROBE3(name, type0, arg0, type1, arg1, type2, arg2)	\
391	DTRACE_PROBE_IMPL_START(name, arg0, arg1, arg2, 0, 0)	 	\
392	SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);		\
393	SDT_PROBE_ARGTYPE(sdt, , , name, 1, #type1, NULL);		\
394	SDT_PROBE_ARGTYPE(sdt, , , name, 2, #type2, NULL);		\
395	DTRACE_PROBE_IMPL_END
396
397#define DTRACE_PROBE4(name, type0, arg0, type1, arg1, type2, arg2, type3, arg3)	\
398	DTRACE_PROBE_IMPL_START(name, arg0, arg1, arg2, arg3, 0) 	\
399	SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);		\
400	SDT_PROBE_ARGTYPE(sdt, , , name, 1, #type1, NULL);		\
401	SDT_PROBE_ARGTYPE(sdt, , , name, 2, #type2, NULL);		\
402	SDT_PROBE_ARGTYPE(sdt, , , name, 3, #type3, NULL);		\
403	DTRACE_PROBE_IMPL_END
404
405#define DTRACE_PROBE5(name, type0, arg0, type1, arg1, type2, arg2, type3, arg3,	\
406    type4, arg4)								\
407	DTRACE_PROBE_IMPL_START(name, arg0, arg1, arg2, arg3, arg4) 	\
408	SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);		\
409	SDT_PROBE_ARGTYPE(sdt, , , name, 1, #type1, NULL);		\
410	SDT_PROBE_ARGTYPE(sdt, , , name, 2, #type2, NULL);		\
411	SDT_PROBE_ARGTYPE(sdt, , , name, 3, #type3, NULL);		\
412	SDT_PROBE_ARGTYPE(sdt, , , name, 4, #type4, NULL);		\
413	DTRACE_PROBE_IMPL_END
414
415#endif /* KDTRACE_HOOKS */
416
417/*
418 * This type definition must match that of dtrace_probe. It is defined this
419 * way to avoid having to rely on CDDL code.
420 */
421typedef	void (*sdt_probe_func_t)(uint32_t, uintptr_t arg0, uintptr_t arg1,
422    uintptr_t arg2, uintptr_t arg3, uintptr_t arg4, uintptr_t arg5);
423
424/*
425 * The 'sdt' provider will set it to dtrace_probe when it loads.
426 */
427extern sdt_probe_func_t		sdt_probe_func;
428
429struct sdt_probe;
430struct sdt_provider;
431struct linker_file;
432
433struct sdt_argtype {
434	int		ndx;		/* Argument index. */
435	const char	*type;		/* Argument type string. */
436	const char	*xtype;		/* Translated argument type. */
437	TAILQ_ENTRY(sdt_argtype)
438			argtype_entry;	/* Argument type list entry. */
439	struct sdt_probe *probe;	/* Ptr to the probe structure. */
440};
441
442struct sdt_probe {
443	int		version;	/* Set to sizeof(struct sdt_probe). */
444	struct sdt_provider *prov;	/* Ptr to the provider structure. */
445	TAILQ_ENTRY(sdt_probe)
446			probe_entry;	/* SDT probe list entry. */
447	TAILQ_HEAD(, sdt_argtype) argtype_list;
448	STAILQ_HEAD(, sdt_tracepoint) tracepoint_list;
449	const char	*mod;
450	const char	*func;
451	const char	*name;
452	id_t		id;		/* DTrace probe ID. */
453	int		n_args;		/* Number of arguments. */
454	struct linker_file *sdtp_lf;	/* Module in which we're defined. */
455};
456
457struct sdt_provider {
458	char *name;			/* Provider name. */
459	TAILQ_ENTRY(sdt_provider)
460			prov_entry;	/* SDT provider list entry. */
461	uintptr_t	id;		/* DTrace provider ID. */
462	int		sdt_refs;	/* Number of module references. */
463};
464
465void sdt_probe_stub(uint32_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t,
466    uintptr_t, uintptr_t);
467
468SDT_PROVIDER_DECLARE(sdt);
469
470#endif /* _KERNEL */
471
472#endif /* _SYS_SDT_H */
473