linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * uprobes-based tracing events

 *

 * Copyright (C) IBM Corporation, 2010-2012

 * Author:  Srikar Dronamraju <srikar@linux.vnet.ibm.com>

 */

#define pr_fmt(fmt) "trace_uprobe: " fmt

​

#include <linux/ctype.h>

#include <linux/module.h>

#include <linux/uaccess.h>

#include <linux/uprobes.h>

#include <linux/namei.h>

#include <linux/string.h>

#include <linux/rculist.h>

​

#include "trace_dynevent.h"

#include "trace_probe.h"

#include "trace_probe_tmpl.h"

​

#define UPROBE_EVENT_SYSTEM "uprobes"

​

struct uprobe_trace_entry_head {

    struct trace_entry  ent;

    unsigned long       vaddr[];

};

​

#define SIZEOF_TRACE_ENTRY(is_return)           \

    (sizeof(struct uprobe_trace_entry_head) +   \

     sizeof(unsigned long) * (is_return ? 2 : 1))

​

#define DATAOF_TRACE_ENTRY(entry, is_return)        \

    ((void*)(entry) + SIZEOF_TRACE_ENTRY(is_return))

​

struct trace_uprobe_filter {

    rwlock_t        rwlock;

    int         nr_systemwide;

    struct list_head    perf_events;

};

​

static int trace_uprobe_create(int argc, const char **argv);

static int trace_uprobe_show(struct seq_file *m, struct dyn_event *ev);

static int trace_uprobe_release(struct dyn_event *ev);

static bool trace_uprobe_is_busy(struct dyn_event *ev);

static bool trace_uprobe_match(const char *system, const char *event,

                   struct dyn_event *ev);

​

static struct dyn_event_operations trace_uprobe_ops = {

    .create = trace_uprobe_create,

    .show = trace_uprobe_show,

    .is_busy = trace_uprobe_is_busy,

    .free = trace_uprobe_release,

    .match = trace_uprobe_match,

};

​

/*

 * uprobe event core functions

 */

struct trace_uprobe {

    struct dyn_event        devent;

    struct trace_uprobe_filter  filter;

    struct uprobe_consumer      consumer;