diff options
Diffstat (limited to 'arch/sparc64/mm/extable.c')
-rw-r--r-- | arch/sparc64/mm/extable.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/arch/sparc64/mm/extable.c b/arch/sparc64/mm/extable.c deleted file mode 100644 index ec334297ff4f..000000000000 --- a/arch/sparc64/mm/extable.c +++ /dev/null | |||
@@ -1,80 +0,0 @@ | |||
1 | /* | ||
2 | * linux/arch/sparc64/mm/extable.c | ||
3 | */ | ||
4 | |||
5 | #include <linux/config.h> | ||
6 | #include <linux/module.h> | ||
7 | #include <asm/uaccess.h> | ||
8 | |||
9 | extern const struct exception_table_entry __start___ex_table[]; | ||
10 | extern const struct exception_table_entry __stop___ex_table[]; | ||
11 | |||
12 | void sort_extable(struct exception_table_entry *start, | ||
13 | struct exception_table_entry *finish) | ||
14 | { | ||
15 | } | ||
16 | |||
17 | /* Caller knows they are in a range if ret->fixup == 0 */ | ||
18 | const struct exception_table_entry * | ||
19 | search_extable(const struct exception_table_entry *start, | ||
20 | const struct exception_table_entry *last, | ||
21 | unsigned long value) | ||
22 | { | ||
23 | const struct exception_table_entry *walk; | ||
24 | |||
25 | /* Single insn entries are encoded as: | ||
26 | * word 1: insn address | ||
27 | * word 2: fixup code address | ||
28 | * | ||
29 | * Range entries are encoded as: | ||
30 | * word 1: first insn address | ||
31 | * word 2: 0 | ||
32 | * word 3: last insn address + 4 bytes | ||
33 | * word 4: fixup code address | ||
34 | * | ||
35 | * See asm/uaccess.h for more details. | ||
36 | */ | ||
37 | |||
38 | /* 1. Try to find an exact match. */ | ||
39 | for (walk = start; walk <= last; walk++) { | ||
40 | if (walk->fixup == 0) { | ||
41 | /* A range entry, skip both parts. */ | ||
42 | walk++; | ||
43 | continue; | ||
44 | } | ||
45 | |||
46 | if (walk->insn == value) | ||
47 | return walk; | ||
48 | } | ||
49 | |||
50 | /* 2. Try to find a range match. */ | ||
51 | for (walk = start; walk <= (last - 1); walk++) { | ||
52 | if (walk->fixup) | ||
53 | continue; | ||
54 | |||
55 | if (walk[0].insn <= value && walk[1].insn > value) | ||
56 | return walk; | ||
57 | |||
58 | walk++; | ||
59 | } | ||
60 | |||
61 | return NULL; | ||
62 | } | ||
63 | |||
64 | /* Special extable search, which handles ranges. Returns fixup */ | ||
65 | unsigned long search_extables_range(unsigned long addr, unsigned long *g2) | ||
66 | { | ||
67 | const struct exception_table_entry *entry; | ||
68 | |||
69 | entry = search_exception_tables(addr); | ||
70 | if (!entry) | ||
71 | return 0; | ||
72 | |||
73 | /* Inside range? Fix g2 and return correct fixup */ | ||
74 | if (!entry->fixup) { | ||
75 | *g2 = (addr - entry->insn) / 4; | ||
76 | return (entry + 1)->fixup; | ||
77 | } | ||
78 | |||
79 | return entry->fixup; | ||
80 | } | ||