1/* Rewritten by Rusty Russell, on the backs of many others... 2 Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 2 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program; if not, write to the Free Software 16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17*/ 18#include <linux/module.h> 19#include <linux/init.h> 20#include <asm/uaccess.h> 21#include <asm/sections.h> 22 23extern struct exception_table_entry __start___ex_table[]; 24extern struct exception_table_entry __stop___ex_table[]; 25 26/* Sort the kernel's built-in exception table */ 27void __init sort_main_extable(void) 28{ 29 sort_extable(__start___ex_table, __stop___ex_table); 30} 31 32/* Given an address, look for it in the exception tables. */ 33const struct exception_table_entry *search_exception_tables(unsigned long addr) 34{ 35 const struct exception_table_entry *e; 36 37 e = search_extable(__start___ex_table, __stop___ex_table-1, addr); 38 if (!e) 39 e = search_module_extables(addr); 40 return e; 41} 42 43int core_kernel_text(unsigned long addr) 44{ 45 if (addr >= (unsigned long)_stext && 46 addr <= (unsigned long)_etext) 47 return 1; 48 49 if (addr >= (unsigned long)_sinittext && 50 addr <= (unsigned long)_einittext) 51 return 1; 52 return 0; 53} 54 55int __kernel_text_address(unsigned long addr) 56{ 57 if (core_kernel_text(addr)) 58 return 1; 59 return __module_text_address(addr) != NULL; 60} 61 62int kernel_text_address(unsigned long addr) 63{ 64 if (core_kernel_text(addr)) 65 return 1; 66 return module_text_address(addr) != NULL; 67} 68