/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright 2006-2008 John Birrell <jb@FreeBSD.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Statically Defined Tracing (SDT) definitions.
 *
 */

#ifndef _SYS_SDT_H
#define _SYS_SDT_H

#ifndef _KERNEL

#define _DTRACE_VERSION 1

#define DTRACE_PROBE(prov, name) {                              \
        extern void __dtrace_##prov##___##name(void);           \
        __dtrace_##prov##___##name();                           \
}

#define DTRACE_PROBE1(prov, name, arg1) {                       \
        extern void __dtrace_##prov##___##name(unsigned long);  \
        __dtrace_##prov##___##name((unsigned long)arg1);        \
}

#define DTRACE_PROBE2(prov, name, arg1, arg2) {                 \
        extern void __dtrace_##prov##___##name(unsigned long,   \
            unsigned long);                                     \
        __dtrace_##prov##___##name((unsigned long)arg1,         \
            (unsigned long)arg2);                               \
}

#define DTRACE_PROBE3(prov, name, arg1, arg2, arg3) {           \
        extern void __dtrace_##prov##___##name(unsigned long,   \
            unsigned long, unsigned long);                      \
        __dtrace_##prov##___##name((unsigned long)arg1,         \
            (unsigned long)arg2, (unsigned long)arg3);          \
}

#define DTRACE_PROBE4(prov, name, arg1, arg2, arg3, arg4) {     \
        extern void __dtrace_##prov##___##name(unsigned long,   \
            unsigned long, unsigned long, unsigned long);       \
        __dtrace_##prov##___##name((unsigned long)arg1,         \
            (unsigned long)arg2, (unsigned long)arg3,           \
            (unsigned long)arg4);                               \
}

#define DTRACE_PROBE5(prov, name, arg1, arg2, arg3, arg4, arg5) {       \
        extern void __dtrace_##prov##___##name(unsigned long,           \
            unsigned long, unsigned long, unsigned long, unsigned long);\
        __dtrace_##prov##___##name((unsigned long)arg1,                 \
            (unsigned long)arg2, (unsigned long)arg3,                   \
            (unsigned long)arg4, (unsigned long)arg5);                  \
}

#else /* _KERNEL */

#include <sys/linker_set.h>
#include <machine/sdt_machdep.h>

extern volatile bool sdt_probes_enabled;

#ifndef KDTRACE_HOOKS

#define __sdt_used      __unused

#define SDT_PROVIDER_DEFINE(prov)
#define SDT_PROVIDER_DECLARE(prov)
#define SDT_PROBE_DEFINE(prov, mod, func, name)
#define SDT_PROBE_DECLARE(prov, mod, func, name)
#define SDT_PROBES_ENABLED()    0
#define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
#define SDT_PROBE_ARGTYPE(prov, mod, func, name, num, type, xtype)

#define SDT_PROBE_DEFINE0(prov, mod, func, name)
#define SDT_PROBE_DEFINE1(prov, mod, func, name, arg0)
#define SDT_PROBE_DEFINE2(prov, mod, func, name, arg0, arg1)
#define SDT_PROBE_DEFINE3(prov, mod, func, name, arg0, arg1, arg2)
#define SDT_PROBE_DEFINE4(prov, mod, func, name, arg0, arg1, arg2, arg3)
#define SDT_PROBE_DEFINE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
#define SDT_PROBE_DEFINE6(prov, mod, func, name, arg0, arg1, arg2,      \
    arg3, arg4, arg5)

#define SDT_PROBE0(prov, mod, func, name)
#define SDT_PROBE1(prov, mod, func, name, arg0)
#define SDT_PROBE2(prov, mod, func, name, arg0, arg1)
#define SDT_PROBE3(prov, mod, func, name, arg0, arg1, arg2)
#define SDT_PROBE4(prov, mod, func, name, arg0, arg1, arg2, arg3)
#define SDT_PROBE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
#define SDT_PROBE6(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4, arg5)

#define MIB_SDT_PROBE1(...)
#define MIB_SDT_PROBE2(...)

#define SDT_PROBE_DEFINE0_XLATE(prov, mod, func, name)
#define SDT_PROBE_DEFINE1_XLATE(prov, mod, func, name, arg0, xarg0)
#define SDT_PROBE_DEFINE2_XLATE(prov, mod, func, name, arg0, xarg0,     \
    arg1, xarg1)
#define SDT_PROBE_DEFINE3_XLATE(prov, mod, func, name, arg0, xarg0,     \
    arg1, xarg1, arg2, xarg2)
#define SDT_PROBE_DEFINE4_XLATE(prov, mod, func, name, arg0, xarg0,     \
    arg1, xarg1, arg2, xarg2, arg3, xarg3)
#define SDT_PROBE_DEFINE5_XLATE(prov, mod, func, name, arg0, xarg0,     \
    arg1, xarg1, arg2, xarg2, arg3, xarg3, arg4, xarg4)
#define SDT_PROBE_DEFINE6_XLATE(prov, mod, func, name, arg0, xarg0,     \
    arg1,  xarg1, arg2, xarg2, arg3, xarg3, arg4, xarg4, arg5, xarg5)

#define DTRACE_PROBE(name)
#define DTRACE_PROBE1(name, type0, arg0)
#define DTRACE_PROBE2(name, type0, arg0, type1, arg1)
#define DTRACE_PROBE3(name, type0, arg0, type1, arg1, type2, arg2)
#define DTRACE_PROBE4(name, type0, arg0, type1, arg1, type2, arg2, type3, arg3)
#define DTRACE_PROBE5(name, type0, arg0, type1, arg1, type2, arg2, type3, arg3,\
    type4, arg4)

#else

void sdt_probe(uint32_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t,
    uintptr_t);
void sdt_probe6(uint32_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t,
    uintptr_t, uintptr_t);

#define _SDT_TRACEPOINT_SET             sdt_tracepoint_set
#define _SDT_TRACEPOINT_SECTION         "set_sdt_tracepoint_set"

bool sdt_tracepoint_valid(uintptr_t patchpoint, uintptr_t target);
void sdt_tracepoint_patch(uintptr_t patchpoint, uintptr_t target);
void sdt_tracepoint_restore(uintptr_t patchpoint);

#define __sdt_used

SET_DECLARE(sdt_providers_set, struct sdt_provider);
SET_DECLARE(sdt_probes_set, struct sdt_probe);
SET_DECLARE(sdt_argtypes_set, struct sdt_argtype);

#define _SDT_PROBE_NAME(prov, mod, func, name)                          \
        sdt_##prov##_##mod##_##func##_##name
#define _SDT_PROVIDER_NAME(prov)                                        \
        sdt_provider_##prov

#define SDT_PROVIDER_DEFINE(_prov)                                      \
        struct sdt_provider _SDT_PROVIDER_NAME(_prov) = {               \
                .name = #_prov,                                         \
        };                                                              \
        DATA_SET(sdt_providers_set, _SDT_PROVIDER_NAME(_prov))

#define SDT_PROVIDER_DECLARE(prov)                                      \
        extern struct sdt_provider _SDT_PROVIDER_NAME(prov)

#define SDT_PROBE_DEFINE(_prov, _mod, _func, _name)                     \
        struct sdt_probe _SDT_PROBE_NAME(_prov, _mod, _func, _name) = { \
                .version = sizeof(struct sdt_probe),                    \
                .prov = &_SDT_PROVIDER_NAME(_prov),                     \
                .mod = #_mod,                                           \
                .func = #_func,                                         \
                .name = #_name,                                         \
        };                                                              \
        DATA_SET(sdt_probes_set, _SDT_PROBE_NAME(_prov, _mod, _func, _name))

#define SDT_PROBE_DECLARE(prov, mod, func, name)                        \
        extern struct sdt_probe _SDT_PROBE_NAME(prov, mod, func, name)

#define SDT_PROBES_ENABLED()    __predict_false(sdt_probes_enabled)

#ifdef _ILP32
#define _SDT_ASM_WORD                   ".long"
#else
#define _SDT_ASM_WORD                   ".quad"
#endif

#ifndef _SDT_ASM_PROBE_CONSTRAINT
#define _SDT_ASM_PROBE_CONSTRAINT       "i"
#endif
#ifndef _SDT_ASM_PROBE_OPERAND
#if !defined(__clang__) && __GNUC_PREREQ__(15, 0)
#define _SDT_ASM_PROBE_OPERAND          "cc"
#else
#define _SDT_ASM_PROBE_OPERAND          "c"
#endif
#endif

/*
 * The asm below generates records corresponding to the structure's layout, so
 * the two must be kept in sync.
 */
struct sdt_tracepoint {
        struct sdt_probe *probe;
        uintptr_t       patchpoint;
        uintptr_t       target;
        STAILQ_ENTRY(sdt_tracepoint) tracepoint_entry;
};

/* XXX: GCC is not able to compile probes in kernel modules for aarch64. */
#if !defined(__clang__) && defined(KLD_MODULE) && defined(__aarch64__)
#undef __sdt_used
#define __sdt_used      __unused
#define __SDT_PROBE(prov, mod, func, name, uniq, f, ...)
#else
#define __SDT_PROBE(prov, mod, func, name, uniq, f, ...) do {           \
        __WEAK(__CONCAT(__start_set_, _SDT_TRACEPOINT_SET));            \
        __WEAK(__CONCAT(__stop_set_, _SDT_TRACEPOINT_SET));             \
        asm goto(                                                       \
            "0:\n"                                                      \
            _SDT_ASM_PATCH_INSTR "\n"                                   \
            ".pushsection " _SDT_TRACEPOINT_SECTION ", \"aw\"\n"        \
            _SDT_ASM_WORD " %" _SDT_ASM_PROBE_OPERAND "0\n"             \
            _SDT_ASM_WORD " 0b\n"                                       \
            _SDT_ASM_WORD " %l1\n"                                      \
            _SDT_ASM_WORD " 0\n"                                        \
            ".popsection\n"                                             \
            :                                                           \
            : _SDT_ASM_PROBE_CONSTRAINT (&_SDT_PROBE_NAME(prov, mod,    \
            func, name))                                                \
            :                                                           \
            : __sdt_probe##uniq);                                       \
        if (0) {                                                        \
__sdt_probe##uniq:;                                                     \
                f(_SDT_PROBE_NAME(prov, mod, func, name).id, __VA_ARGS__); \
        }                                                               \
} while (0)
#endif
#define _SDT_PROBE(prov, mod, func, name, uniq, f, ...)                 \
        __SDT_PROBE(prov, mod, func, name, uniq, f, __VA_ARGS__)
#define SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)  \
        _SDT_PROBE(prov, mod, func, name, __COUNTER__, sdt_probe,       \
            (uintptr_t)arg0, (uintptr_t)arg1, (uintptr_t)arg2,          \
            (uintptr_t)arg3, (uintptr_t)arg4)

#define SDT_PROBE_ARGTYPE(_prov, _mod, _func, _name, _num, _type, _xtype) \
        static struct sdt_argtype                                       \
            sdta_##_prov##_##_mod##_##_func##_##_name##_num[1] = {      \
                [0] = {                                                 \
                    .ndx = _num,                                        \
                    .type = _type,                                      \
                    .xtype = _xtype,                                    \
                    .probe = &_SDT_PROBE_NAME(_prov, _mod, _func, _name), \
                },                                                      \
        };                                                              \
        DATA_SET(sdt_argtypes_set,                                      \
            sdta_##_prov##_##_mod##_##_func##_##_name##_num);

#define SDT_PROBE_DEFINE0(prov, mod, func, name)                        \
        SDT_PROBE_DEFINE(prov, mod, func, name)

#define SDT_PROBE_DEFINE1(prov, mod, func, name, arg0)                  \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL)

#define SDT_PROBE_DEFINE2(prov, mod, func, name, arg0, arg1)            \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL)

#define SDT_PROBE_DEFINE3(prov, mod, func, name, arg0, arg1, arg2)\
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, NULL)

#define SDT_PROBE_DEFINE4(prov, mod, func, name, arg0, arg1, arg2, arg3) \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, NULL)

#define SDT_PROBE_DEFINE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4, NULL)

#define SDT_PROBE_DEFINE6(prov, mod, func, name, arg0, arg1, arg2, arg3,\
    arg4, arg5) \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4, NULL);        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 5, arg5, NULL)

#define SDT_PROBE_DEFINE0_XLATE(prov, mod, func, name)          \
        SDT_PROBE_DEFINE(prov, mod, func, name)

#define SDT_PROBE_DEFINE1_XLATE(prov, mod, func, name, arg0, xarg0) \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0)

#define SDT_PROBE_DEFINE2_XLATE(prov, mod, func, name, arg0, xarg0, \
    arg1,  xarg1)                                                       \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1)

#define SDT_PROBE_DEFINE3_XLATE(prov, mod, func, name, arg0, xarg0, \
    arg1, xarg1, arg2, xarg2)                                           \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, xarg2)

#define SDT_PROBE_DEFINE4_XLATE(prov, mod, func, name, arg0, xarg0, \
    arg1, xarg1, arg2, xarg2, arg3, xarg3)                              \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, xarg2);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, xarg3)

#define SDT_PROBE_DEFINE5_XLATE(prov, mod, func, name, arg0, xarg0, \
    arg1, xarg1, arg2, xarg2, arg3, xarg3, arg4, xarg4)                 \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, xarg2);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, xarg3);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4, xarg4)

#define SDT_PROBE_DEFINE6_XLATE(prov, mod, func, name, arg0, xarg0, \
    arg1, xarg1, arg2, xarg2, arg3, xarg3, arg4, xarg4, arg5, xarg5)    \
        SDT_PROBE_DEFINE(prov, mod, func, name);                        \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 0, arg0, xarg0);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 1, arg1, xarg1);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 2, arg2, xarg2);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 3, arg3, xarg3);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 4, arg4, xarg4);       \
        SDT_PROBE_ARGTYPE(prov, mod, func, name, 5, arg5, xarg5)

#define SDT_PROBE0(prov, mod, func, name)                               \
        SDT_PROBE(prov, mod, func, name, 0, 0, 0, 0, 0)
#define SDT_PROBE1(prov, mod, func, name, arg0)                         \
        SDT_PROBE(prov, mod, func, name, arg0, 0, 0, 0, 0)
#define SDT_PROBE2(prov, mod, func, name, arg0, arg1)                   \
        SDT_PROBE(prov, mod, func, name, arg0, arg1, 0, 0, 0)
#define SDT_PROBE3(prov, mod, func, name, arg0, arg1, arg2)             \
        SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2,  0, 0)
#define SDT_PROBE4(prov, mod, func, name, arg0, arg1, arg2, arg3)       \
        SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, 0)
#define SDT_PROBE5(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4) \
        SDT_PROBE(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4)
#define SDT_PROBE6(prov, mod, func, name, arg0, arg1, arg2, arg3, arg4, arg5) \
        _SDT_PROBE(prov, mod, func, name, __COUNTER__, sdt_probe6,      \
            (uintptr_t)arg0, (uintptr_t)arg1, (uintptr_t)arg2,          \
            (uintptr_t)arg3, (uintptr_t)arg4, (uintptr_t)arg5)

#ifdef KDTRACE_MIB_SDT
#define MIB_SDT_PROBE1(...)     SDT_PROBE1(mib, __VA_ARGS__)
#define MIB_SDT_PROBE2(...)     SDT_PROBE2(mib, __VA_ARGS__)
#else
#define MIB_SDT_PROBE1(...)
#define MIB_SDT_PROBE2(...)
#endif

#define DTRACE_PROBE_IMPL_START(name, arg0, arg1, arg2, arg3, arg4)     do { \
        static SDT_PROBE_DEFINE(sdt, , , name);                              \
        SDT_PROBE(sdt, , , name, arg0, arg1, arg2, arg3, arg4);
#define DTRACE_PROBE_IMPL_END   } while (0)

#define DTRACE_PROBE(name)                                              \
        DTRACE_PROBE_IMPL_START(name, 0, 0, 0, 0, 0)                    \
        DTRACE_PROBE_IMPL_END

#define DTRACE_PROBE1(name, type0, arg0)                                \
        DTRACE_PROBE_IMPL_START(name, arg0, 0, 0, 0, 0)                 \
        SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);              \
        DTRACE_PROBE_IMPL_END

#define DTRACE_PROBE2(name, type0, arg0, type1, arg1)                   \
        DTRACE_PROBE_IMPL_START(name, arg0, arg1, 0, 0, 0)              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 1, #type1, NULL);              \
        DTRACE_PROBE_IMPL_END

#define DTRACE_PROBE3(name, type0, arg0, type1, arg1, type2, arg2)      \
        DTRACE_PROBE_IMPL_START(name, arg0, arg1, arg2, 0, 0)           \
        SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 1, #type1, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 2, #type2, NULL);              \
        DTRACE_PROBE_IMPL_END

#define DTRACE_PROBE4(name, type0, arg0, type1, arg1, type2, arg2, type3, arg3) \
        DTRACE_PROBE_IMPL_START(name, arg0, arg1, arg2, arg3, 0)        \
        SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 1, #type1, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 2, #type2, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 3, #type3, NULL);              \
        DTRACE_PROBE_IMPL_END

#define DTRACE_PROBE5(name, type0, arg0, type1, arg1, type2, arg2, type3, arg3, \
    type4, arg4)                                                                \
        DTRACE_PROBE_IMPL_START(name, arg0, arg1, arg2, arg3, arg4)     \
        SDT_PROBE_ARGTYPE(sdt, , , name, 0, #type0, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 1, #type1, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 2, #type2, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 3, #type3, NULL);              \
        SDT_PROBE_ARGTYPE(sdt, , , name, 4, #type4, NULL);              \
        DTRACE_PROBE_IMPL_END

#endif /* KDTRACE_HOOKS */

/*
 * This type definition must match that of dtrace_probe. It is defined this
 * way to avoid having to rely on CDDL code.
 */
typedef void (*sdt_probe_func_t)(uint32_t, uintptr_t arg0, uintptr_t arg1,
    uintptr_t arg2, uintptr_t arg3, uintptr_t arg4, uintptr_t arg5);

/*
 * The 'sdt' provider will set it to dtrace_probe when it loads.
 */
extern sdt_probe_func_t         sdt_probe_func;

struct sdt_probe;
struct sdt_provider;
struct linker_file;

struct sdt_argtype {
        int             ndx;            /* Argument index. */
        const char      *type;          /* Argument type string. */
        const char      *xtype;         /* Translated argument type. */
        TAILQ_ENTRY(sdt_argtype)
                        argtype_entry;  /* Argument type list entry. */
        struct sdt_probe *probe;        /* Ptr to the probe structure. */
};

struct sdt_probe {
        int             version;        /* Set to sizeof(struct sdt_probe). */
        struct sdt_provider *prov;      /* Ptr to the provider structure. */
        TAILQ_ENTRY(sdt_probe)
                        probe_entry;    /* SDT probe list entry. */
        TAILQ_HEAD(, sdt_argtype) argtype_list;
        STAILQ_HEAD(, sdt_tracepoint) tracepoint_list;
        const char      *mod;
        const char      *func;
        const char      *name;
        uint32_t        id;             /* DTrace probe ID. */
        int             n_args;         /* Number of arguments. */
        struct linker_file *sdtp_lf;    /* Module in which we're defined. */
};

struct sdt_provider {
        char *name;                     /* Provider name. */
        TAILQ_ENTRY(sdt_provider)
                        prov_entry;     /* SDT provider list entry. */
        uintptr_t       id;             /* DTrace provider ID. */
        int             sdt_refs;       /* Number of module references. */
};

void sdt_probe_stub(uint32_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t,
    uintptr_t, uintptr_t);

SDT_PROVIDER_DECLARE(sdt);

#endif /* _KERNEL */

#endif /* _SYS_SDT_H */