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 | } | ||
