blob: 6104120b79da2804a511860d7bf6b115a6c01a2d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/*
* linux/arch/m68k/mm/extable.c
*/
#include <linux/config.h>
#include <linux/module.h>
#include <asm/uaccess.h>
extern const struct exception_table_entry __start___ex_table[];
extern const struct exception_table_entry __stop___ex_table[];
static inline unsigned long
search_one_table(const struct exception_table_entry *first,
const struct exception_table_entry *last,
unsigned long value)
{
while (first <= last) {
const struct exception_table_entry *mid;
long diff;
mid = (last - first) / 2 + first;
diff = value - mid->insn;
if (diff >= 0 && diff <= 2)
return mid->fixup;
else if (diff > 0)
first = mid+1;
else
last = mid-1;
}
return 0;
}
unsigned long
search_exception_table(unsigned long addr)
{
unsigned long ret;
#ifdef CONFIG_MODULES
struct module *mp;
#endif
/* Search the kernel's table first. */
ret = search_one_table(__start___ex_table, __stop___ex_table-1, addr);
if (ret)
return ret;
#ifdef CONFIG_MODULES
for (mp = module_list; mp != NULL; mp = mp->next) {
if (mp->exceptinfo.start != NULL) {
ret = search_one_table(mp->exceptinfo.start,
mp->exceptinfo.stop-1, addr);
if (ret)
return ret;
}
}
#endif
return 0;
}
|
