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 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 }
68
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