arch/riscv/mm/extable.c

   1 /*
   2  * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
   3  *  Lennox Wu <lennox.wu@sunplusct.com>
   4  *  Chen Liqin <liqin.chen@sunplusct.com>
   5  * Copyright (C) 2013 Regents of the University of California
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, see the file COPYING, or write
  19  * to the Free Software Foundation, Inc.,
  20  */
  21
  22
  23 #include <linux/extable.h>
  24 #include <linux/module.h>
  25 #include <linux/uaccess.h>
  26
  27 int fixup_exception(struct pt_regs *regs)
  28 {
  29         const struct exception_table_entry *fixup;
  30
  31         fixup = search_exception_tables(regs->sepc);
  32         if (fixup) {
  33                 regs->sepc = fixup->fixup;
  34                 return 1;
  35         }
  36         return 0;
  37 }