Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Frederic Weisbecker | 8b96f01 | 2008-12-06 03:40:00 +0100 | [diff] [blame^] | 20 | #include <linux/ftrace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <asm/uaccess.h> |
| 22 | #include <asm/sections.h> |
| 23 | |
| 24 | extern struct exception_table_entry __start___ex_table[]; |
| 25 | extern struct exception_table_entry __stop___ex_table[]; |
| 26 | |
| 27 | /* Sort the kernel's built-in exception table */ |
| 28 | void __init sort_main_extable(void) |
| 29 | { |
| 30 | sort_extable(__start___ex_table, __stop___ex_table); |
| 31 | } |
| 32 | |
| 33 | /* Given an address, look for it in the exception tables. */ |
| 34 | const struct exception_table_entry *search_exception_tables(unsigned long addr) |
| 35 | { |
| 36 | const struct exception_table_entry *e; |
| 37 | |
| 38 | e = search_extable(__start___ex_table, __stop___ex_table-1, addr); |
| 39 | if (!e) |
| 40 | e = search_module_extables(addr); |
| 41 | return e; |
| 42 | } |
| 43 | |
Frederic Weisbecker | 8b96f01 | 2008-12-06 03:40:00 +0100 | [diff] [blame^] | 44 | __notrace_funcgraph int core_kernel_text(unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | { |
| 46 | if (addr >= (unsigned long)_stext && |
| 47 | addr <= (unsigned long)_etext) |
| 48 | return 1; |
| 49 | |
Rusty Russell | a2da405 | 2008-01-29 17:13:17 -0500 | [diff] [blame] | 50 | if (system_state == SYSTEM_BOOTING && |
| 51 | addr >= (unsigned long)_sinittext && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | addr <= (unsigned long)_einittext) |
| 53 | return 1; |
| 54 | return 0; |
| 55 | } |
| 56 | |
Frederic Weisbecker | 8b96f01 | 2008-12-06 03:40:00 +0100 | [diff] [blame^] | 57 | __notrace_funcgraph int __kernel_text_address(unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | { |
| 59 | if (core_kernel_text(addr)) |
| 60 | return 1; |
| 61 | return __module_text_address(addr) != NULL; |
| 62 | } |
| 63 | |
| 64 | int kernel_text_address(unsigned long addr) |
| 65 | { |
| 66 | if (core_kernel_text(addr)) |
| 67 | return 1; |
| 68 | return module_text_address(addr) != NULL; |
| 69 | } |