1/* SPDX-License-Identifier: GPL-2.0 */
 2
 3#undef TRACE_SYSTEM_VAR
 4
 5#ifdef CONFIG_BPF_EVENTS
 6
 7#undef __entry
 8#define __entry entry
 9
10#undef __get_dynamic_array
11#define __get_dynamic_array(field)	\
12		((void *)__entry + (__entry->__data_loc_##field & 0xffff))
13
14#undef __get_dynamic_array_len
15#define __get_dynamic_array_len(field)	\
16		((__entry->__data_loc_##field >> 16) & 0xffff)
17
18#undef __get_str
19#define __get_str(field) ((char *)__get_dynamic_array(field))
20
21#undef __get_bitmask
22#define __get_bitmask(field) (char *)__get_dynamic_array(field)
23
24#undef __perf_count
25#define __perf_count(c)	(c)
26
27#undef __perf_task
28#define __perf_task(t)	(t)
29
30/* cast any integer, pointer, or small struct to u64 */
31#define UINTTYPE(size) \
32	__typeof__(__builtin_choose_expr(size == 1,  (u8)1, \
33		   __builtin_choose_expr(size == 2, (u16)2, \
34		   __builtin_choose_expr(size == 4, (u32)3, \
35		   __builtin_choose_expr(size == 8, (u64)4, \
36					 (void)5)))))
37#define __CAST_TO_U64(x) ({ \
38	typeof(x) __src = (x); \
39	UINTTYPE(sizeof(x)) __dst; \
40	memcpy(&__dst, &__src, sizeof(__dst)); \
41	(u64)__dst; })
42
43#define __CAST1(a,...) __CAST_TO_U64(a)
44#define __CAST2(a,...) __CAST_TO_U64(a), __CAST1(__VA_ARGS__)
45#define __CAST3(a,...) __CAST_TO_U64(a), __CAST2(__VA_ARGS__)
46#define __CAST4(a,...) __CAST_TO_U64(a), __CAST3(__VA_ARGS__)
47#define __CAST5(a,...) __CAST_TO_U64(a), __CAST4(__VA_ARGS__)
48#define __CAST6(a,...) __CAST_TO_U64(a), __CAST5(__VA_ARGS__)
49#define __CAST7(a,...) __CAST_TO_U64(a), __CAST6(__VA_ARGS__)
50#define __CAST8(a,...) __CAST_TO_U64(a), __CAST7(__VA_ARGS__)
51#define __CAST9(a,...) __CAST_TO_U64(a), __CAST8(__VA_ARGS__)
52#define __CAST10(a,...) __CAST_TO_U64(a), __CAST9(__VA_ARGS__)
53#define __CAST11(a,...) __CAST_TO_U64(a), __CAST10(__VA_ARGS__)
54#define __CAST12(a,...) __CAST_TO_U64(a), __CAST11(__VA_ARGS__)
55/* tracepoints with more than 12 arguments will hit build error */
56#define CAST_TO_U64(...) CONCATENATE(__CAST, COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__)
57
58#undef DECLARE_EVENT_CLASS
59#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\
60static notrace void							\
61__bpf_trace_##call(void *__data, proto)					\
62{									\
63	struct bpf_prog *prog = __data;					\
64	CONCATENATE(bpf_trace_run, COUNT_ARGS(args))(prog, CAST_TO_U64(args));	\
65}
66
67/*
68 * This part is compiled out, it is only here as a build time check
69 * to make sure that if the tracepoint handling changes, the
70 * bpf probe will fail to compile unless it too is updated.
71 */
72#undef DEFINE_EVENT
73#define DEFINE_EVENT(template, call, proto, args)			\
74static inline void bpf_test_probe_##call(void)				\
75{									\
76	check_trace_callback_type_##call(__bpf_trace_##template);	\
77}									\
78static struct bpf_raw_event_map	__used					\
79	__attribute__((section("__bpf_raw_tp_map")))			\
80__bpf_trace_tp_map_##call = {						\
81	.tp		= &__tracepoint_##call,				\
82	.bpf_func	= (void *)__bpf_trace_##template,		\
83	.num_args	= COUNT_ARGS(args),				\
84};
85
86
87#undef DEFINE_EVENT_PRINT
88#define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
89	DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
90
91#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
92#endif /* CONFIG_BPF_EVENTS */