/* Rewritten by Rusty Russell, on the backs of many others...
     Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM.
  
      This program is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation; either version 2 of the License, or
      (at your option) any later version.
  
      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.
  
      You should have received a copy of the GNU General Public License
      along with this program; if not, write to the Free Software
      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
  #include <linux/module.h>
  #include <linux/init.h>
  #include <asm/uaccess.h>
  #include <asm/sections.h>
  
  extern struct exception_table_entry __start___ex_table[];
  extern struct exception_table_entry __stop___ex_table[];
  
  /* Sort the kernel's built-in exception table */
  void __init sort_main_extable(void)
  {
  	sort_extable(__start___ex_table, __stop___ex_table);
  }
  
  /* Given an address, look for it in the exception tables. */
  const struct exception_table_entry *search_exception_tables(unsigned long addr)
  {
  	const struct exception_table_entry *e;
  
  	e = search_extable(__start___ex_table, __stop___ex_table-1, addr);
  	if (!e)
  		e = search_module_extables(addr);
  	return e;
  }

  int core_kernel_text(unsigned long addr)

  {
  	if (addr >= (unsigned long)_stext &&
  	    addr <= (unsigned long)_etext)
  		return 1;

  	if (system_state == SYSTEM_BOOTING &&
  	    addr >= (unsigned long)_sinittext &&

  	    addr <= (unsigned long)_einittext)
  		return 1;
  	return 0;
  }
  
  int __kernel_text_address(unsigned long addr)
  {
  	if (core_kernel_text(addr))
  		return 1;
  	return __module_text_address(addr) != NULL;
  }
  
  int kernel_text_address(unsigned long addr)
  {
  	if (core_kernel_text(addr))
  		return 1;
  	return module_text_address(addr) != NULL;
  }