/* SPDX-License-Identifier: GPL-2.0 */ #undef TRACE_SYSTEM_VAR #ifdef CONFIG_BPF_EVENTS #include "stages/stage6_event_callback.h" #undef __perf_count#define __perf_count(c)	(c) #undef __perf_task#define __perf_task(t)	(t) #include <linux/args.h> /* cast any integer, pointer, or small struct to u64 */#define UINTTYPE(size) \	__typeof__(__builtin_choose_expr(size == 1,  (u8)1, \		   __builtin_choose_expr(size == 2, (u16)2, \		   __builtin_choose_expr(size == 4, (u32)3, \		   __builtin_choose_expr(size == 8, (u64)4, \					 (void)5)))))#define __CAST_TO_U64(x) ({ \	typeof(x) __src = (x); \	UINTTYPE(sizeof(x)) __dst; \	memcpy(&__dst, &__src, sizeof(__dst)); \	(u64)__dst; }) #define __CAST1(a,...) __CAST_TO_U64(a)#define __CAST2(a,...) __CAST_TO_U64(a), __CAST1(__VA_ARGS__)#define __CAST3(a,...) __CAST_TO_U64(a), __CAST2(__VA_ARGS__)#define __CAST4(a,...) __CAST_TO_U64(a), __CAST3(__VA_ARGS__)#define __CAST5(a,...) __CAST_TO_U64(a), __CAST4(__VA_ARGS__)#define __CAST6(a,...) __CAST_TO_U64(a), __CAST5(__VA_ARGS__)#define __CAST7(a,...) __CAST_TO_U64(a), __CAST6(__VA_ARGS__)#define __CAST8(a,...) __CAST_TO_U64(a), __CAST7(__VA_ARGS__)#define __CAST9(a,...) __CAST_TO_U64(a), __CAST8(__VA_ARGS__)#define __CAST10(a,...) __CAST_TO_U64(a), __CAST9(__VA_ARGS__)#define __CAST11(a,...) __CAST_TO_U64(a), __CAST10(__VA_ARGS__)#define __CAST12(a,...) __CAST_TO_U64(a), __CAST11(__VA_ARGS__)/* tracepoints with more than 12 arguments will hit build error */#define CAST_TO_U64(...) CONCATENATE(__CAST, COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__) #define __BPF_DECLARE_TRACE(call, proto, args)				\static notrace void							\__bpf_trace_##call(void *__data, proto)					\{									\	CONCATENATE(bpf_trace_run, COUNT_ARGS(args))(__data, CAST_TO_U64(args));	\} #undef DECLARE_EVENT_CLASS#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print)	\	__BPF_DECLARE_TRACE(call, PARAMS(proto), PARAMS(args)) #define __BPF_DECLARE_TRACE_SYSCALL(call, proto, args)			\static notrace void							\__bpf_trace_##call(void *__data, proto)					\{									\	might_fault();							\	CONCATENATE(bpf_trace_run, COUNT_ARGS(args))(__data, CAST_TO_U64(args));	\} #undef DECLARE_EVENT_SYSCALL_CLASS#define DECLARE_EVENT_SYSCALL_CLASS(call, proto, args, tstruct, assign, print)	\	__BPF_DECLARE_TRACE_SYSCALL(call, PARAMS(proto), PARAMS(args)) /* * This part is compiled out, it is only here as a build time check * to make sure that if the tracepoint handling changes, the * bpf probe will fail to compile unless it too is updated. */#define __DEFINE_EVENT(template, call, proto, args, size)		\static inline void bpf_test_probe_##call(void)				\{									\	check_trace_callback_type_##call(__bpf_trace_##template);	\}									\typedef void (*btf_trace_##call)(void *__data, proto);			\static union {								\	struct bpf_raw_event_map event;					\	btf_trace_##call handler;					\} __bpf_trace_tp_map_##call __used					\__section("__bpf_raw_tp_map") = {					\	.event = {							\		.tp		= &__tracepoint_##call,			\		.bpf_func	= __bpf_trace_##template,		\		.num_args	= COUNT_ARGS(args),			\		.writable_size	= size,					\	},								\}; #define FIRST(x, ...) x #define __CHECK_WRITABLE_BUF_SIZE(call, proto, args, size)		\static inline void bpf_test_buffer_##call(void)				\{									\	/* BUILD_BUG_ON() is ignored if the code is completely eliminated, but \	 * BUILD_BUG_ON_ZERO() uses a different mechanism that is not	\	 * dead-code-eliminated.					\	 */								\	FIRST(proto);							\	(void)BUILD_BUG_ON_ZERO(size != sizeof(*FIRST(args)));		\} #undef DEFINE_EVENT_WRITABLE#define DEFINE_EVENT_WRITABLE(template, call, proto, args, size) \	__CHECK_WRITABLE_BUF_SIZE(call, PARAMS(proto), PARAMS(args), size) \	__DEFINE_EVENT(template, call, PARAMS(proto), PARAMS(args), size) #undef DEFINE_EVENT#define DEFINE_EVENT(template, call, proto, args)			\	__DEFINE_EVENT(template, call, PARAMS(proto), PARAMS(args), 0) #undef DEFINE_EVENT_PRINT#define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\	DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) #undef DECLARE_TRACE#define DECLARE_TRACE(call, proto, args)				\	__BPF_DECLARE_TRACE(call##_tp, PARAMS(proto), PARAMS(args))		\	__DEFINE_EVENT(call##_tp, call##_tp, PARAMS(proto), PARAMS(args), 0) #undef DECLARE_TRACE_WRITABLE#define DECLARE_TRACE_WRITABLE(call, proto, args, size) \	__CHECK_WRITABLE_BUF_SIZE(call, PARAMS(proto), PARAMS(args), size) \	__BPF_DECLARE_TRACE(call##_tp, PARAMS(proto), PARAMS(args)) \	__DEFINE_EVENT(call##_tp, call##_tp, PARAMS(proto), PARAMS(args), size) #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) #undef DECLARE_TRACE_WRITABLE#undef DEFINE_EVENT_WRITABLE#undef __CHECK_WRITABLE_BUF_SIZE#undef __DEFINE_EVENT#undef FIRST #endif /* CONFIG_BPF_EVENTS */