linux-imx

// 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 accesible via perf.

 */

#undef FTRACE_ENTRY_REG

#define FTRACE_ENTRY_REG(name, struct_name, id, tstruct, print, \

             filter, regfn) \

    FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \

             filter)

​

/* not needed for this file */

#undef __field_struct

#define __field_struct(type, item)

​

#undef __field

#define __field(type, item)             type item;

​

#undef __field_desc

#define __field_desc(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, filter) \

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, filter) \

    FTRACE_ENTRY(name, struct_name, id, PARAMS(tstruct), PARAMS(print), \

             filter)

​

#include "trace_entries.h"

​

#undef __field

#define __field(type, item)                     \

    ret = trace_define_field(event_call, #type, #item,      \

                 offsetof(typeof(field), item),     \

                 sizeof(field.item),            \

                 is_signed_type(type), filter_type);    \

    if (ret)                            \

        return ret;

​

#undef __field_desc

#define __field_desc(type, container, item) \