// SPDX-License-Identifier: GPL-2.0/* * trace_export.c - export basic ftrace utilities to user space * * Copyright (C) 2009 Steven Rostedt <srostedt@redhat.com> */#include <linux/stringify.h>#include <linux/kallsyms.h>#include <linux/seq_file.h>#include <linux/uaccess.h>#include <linux/ftrace.h>#include <linux/module.h>#include <linux/init.h> #include "trace_output.h" /* Stub function for events with triggers */static int ftrace_event_register(struct trace_event_call *call,				 enum trace_reg type, void *data){	return 0;} #undef TRACE_SYSTEM#define TRACE_SYSTEM	ftrace /* * The FTRACE_ENTRY_REG macro allows ftrace entry to define register * function and thus become accessible via perf. */#undef FTRACE_ENTRY_REG#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, regfn) \	FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print)) /* not needed for this file */#undef __field_struct#define __field_struct(type, item) #undef __field#define __field(type, item)				type item; #undef __field_fn#define __field_fn(type, item)				type item; #undef __field_desc#define __field_desc(type, container, item)		type item; #undef __field_packed#define __field_packed(type, container, item)		type item; #undef __array#define __array(type, item, size)			type item[size]; #undef __array_desc#define __array_desc(type, container, item, size)	type item[size]; #undef __dynamic_array#define __dynamic_array(type, item)			type item[]; #undef F_STRUCT#define F_STRUCT(args...)				args #undef F_printk#define F_printk(fmt, args...) fmt, args #undef FTRACE_ENTRY#define FTRACE_ENTRY(name, struct_name, id, tstruct, print)		\struct ____ftrace_##name {						\	tstruct								\};									\static void __always_unused ____ftrace_check_##name(void)		\{									\	struct ____ftrace_##name *__entry = NULL;			\									\	/* force compile-time check on F_printk() */			\	printk(print);							\} #undef FTRACE_ENTRY_DUP#define FTRACE_ENTRY_DUP(name, struct_name, id, tstruct, print)		\	FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print)) #include "trace_entries.h" #undef __field_ext#define __field_ext(_type, _item, _filter_type) {			\	.type = #_type, .name = #_item,					\	.size = sizeof(_type), .align = __alignof__(_type),		\	is_signed_type(_type), .filter_type = _filter_type },  #undef __field_ext_packed#define __field_ext_packed(_type, _item, _filter_type) {	\	.type = #_type, .name = #_item,				\	.size = sizeof(_type), .align = 1,			\	is_signed_type(_type), .filter_type = _filter_type }, #undef __field#define __field(_type, _item) __field_ext(_type, _item, FILTER_OTHER) #undef __field_fn#define __field_fn(_type, _item) __field_ext(_type, _item, FILTER_TRACE_FN) #undef __field_desc#define __field_desc(_type, _container, _item) __field_ext(_type, _item, FILTER_OTHER) #undef __field_packed#define __field_packed(_type, _container, _item) __field_ext_packed(_type, _item, FILTER_OTHER) #undef __array#define __array(_type, _item, _len) {					\	.type = #_type"["__stringify(_len)"]", .name = #_item,		\	.size = sizeof(_type[_len]), .align = __alignof__(_type),	\	is_signed_type(_type), .filter_type = FILTER_OTHER }, #undef __array_desc#define __array_desc(_type, _container, _item, _len) __array(_type, _item, _len) #undef __dynamic_array#define __dynamic_array(_type, _item) {					\	.type = #_type "[]", .name = #_item,				\	.size = 0, .align = __alignof__(_type),				\	is_signed_type(_type), .filter_type = FILTER_OTHER }, #undef FTRACE_ENTRY#define FTRACE_ENTRY(name, struct_name, id, tstruct, print)		\static struct trace_event_fields ftrace_event_fields_##name[] = {	\	tstruct								\	{} }; #include "trace_entries.h" #undef __entry#define __entry REC #undef __field#define __field(type, item) #undef __field_fn#define __field_fn(type, item) #undef __field_desc#define __field_desc(type, container, item) #undef __field_packed#define __field_packed(type, container, item) #undef __array#define __array(type, item, len) #undef __array_desc#define __array_desc(type, container, item, len) #undef __dynamic_array#define __dynamic_array(type, item) #undef F_printk#define F_printk(fmt, args...) __stringify(fmt) ", "  __stringify(args) #undef FTRACE_ENTRY_REG#define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, regfn) \static struct trace_event_class __refdata event_class_ftrace_##call = {	\	.system			= __stringify(TRACE_SYSTEM),		\	.fields_array		= ftrace_event_fields_##call,		\	.fields			= LIST_HEAD_INIT(event_class_ftrace_##call.fields),\	.reg			= regfn,				\};									\									\struct trace_event_call __used event_##call = {				\	.class			= &event_class_ftrace_##call,		\	{								\		.name			= #call,			\	},								\	.event.type		= etype,				\	.print_fmt		= print,				\	.flags			= TRACE_EVENT_FL_IGNORE_ENABLE,		\};									\static struct trace_event_call __used						\__section("_ftrace_events") *__event_##call = &event_##call; #undef FTRACE_ENTRY#define FTRACE_ENTRY(call, struct_name, etype, tstruct, print)		\	FTRACE_ENTRY_REG(call, struct_name, etype,			\			 PARAMS(tstruct), PARAMS(print), NULL) bool ftrace_event_is_function(struct trace_event_call *call){	return call == &event_function;} #include "trace_entries.h"