Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/kernel/extable.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 2034 byte(s)
Tag kernel26-2.6.12-alx-r9
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 | |
23 | extern struct exception_table_entry __start___ex_table[]; |
24 | extern struct exception_table_entry __stop___ex_table[]; |
25 | |
26 | /* Sort the kernel's built-in exception table */ |
27 | void __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. */ |
33 | const 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 | |
43 | static int 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 | |
55 | int __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 | |
62 | int kernel_text_address(unsigned long addr) |
63 | { |
64 | if (core_kernel_text(addr)) |
65 | return 1; |
66 | return module_text_address(addr) != NULL; |
67 | } |