linux-imx

/*

 * UBSAN error reporting functions

 *

 * Copyright (c) 2014 Samsung Electronics Co., Ltd.

 * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */

​

#include <linux/bitops.h>

#include <linux/bug.h>

#include <linux/ctype.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/sched.h>

​

#include "ubsan.h"

​

const char *type_check_kinds[] = {

    "load of",

    "store to",

    "reference binding to",

    "member access within",

    "member call on",

    "constructor call on",

    "downcast of",

    "downcast of"

};

​

#define REPORTED_BIT 31

​

#if (BITS_PER_LONG == 64) && defined(__BIG_ENDIAN)

#define COLUMN_MASK (~(1U << REPORTED_BIT))

#define LINE_MASK   (~0U)

#else

#define COLUMN_MASK   (~0U)

#define LINE_MASK (~(1U << REPORTED_BIT))

#endif

​

#define VALUE_LENGTH 40

​

static bool was_reported(struct source_location *location)

{

    return test_and_set_bit(REPORTED_BIT, &location->reported);

}

​

static void print_source_location(const char *prefix,

                struct source_location *loc)

{

    pr_err("%s %s:%d:%d\n", prefix, loc->file_name,

        loc->line & LINE_MASK, loc->column & COLUMN_MASK);

}

​

static bool suppress_report(struct source_location *loc)

{

    return current->in_ubsan || was_reported(loc);

}

​

static bool type_is_int(struct type_descriptor *type)