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authorPaul Mundt <lethal@linux-sh.org>2007-11-11 17:24:50 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-01-28 13:18:44 +0900
commit83ce3ac1d13f9a3ae83485a5e5a1cb85faf865ff (patch)
tree0c96e81a5a8019451b9f3036fc691a50d9ae8c78 /arch/sh64
parent8a7bcf0dd0d49fe8b0071adef0dfe8610abdffaa (diff)
sh: Split out extable.c _32 and _64 variants.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh64')
-rw-r--r--arch/sh64/mm/extable.c80
1 files changed, 0 insertions, 80 deletions
diff --git a/arch/sh64/mm/extable.c b/arch/sh64/mm/extable.c
deleted file mode 100644
index a2e6e056377..00000000000
--- a/arch/sh64/mm/extable.c
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * arch/sh64/mm/extable.c
- *
- * Copyright (C) 2003 Richard Curnow
- * Copyright (C) 2003, 2004 Paul Mundt
- *
- * Cloned from the 2.5 SH version..
- */
-#include <linux/rwsem.h>
-#include <linux/module.h>
-#include <asm/uaccess.h>
-
-extern unsigned long copy_user_memcpy, copy_user_memcpy_end;
-extern void __copy_user_fixup(void);
-
-static const struct exception_table_entry __copy_user_fixup_ex = {
- .fixup = (unsigned long)&__copy_user_fixup,
-};
-
-/* Some functions that may trap due to a bad user-mode address have too many loads
- and stores in them to make it at all practical to label each one and put them all in
- the main exception table.
-
- In particular, the fast memcpy routine is like this. It's fix-up is just to fall back
- to a slow byte-at-a-time copy, which is handled the conventional way. So it's functionally
- OK to just handle any trap occurring in the fast memcpy with that fixup. */
-static const struct exception_table_entry *check_exception_ranges(unsigned long addr)
-{
- if ((addr >= (unsigned long)&copy_user_memcpy) &&
- (addr <= (unsigned long)&copy_user_memcpy_end))
- return &__copy_user_fixup_ex;
-
- return NULL;
-}
-
-/* Simple binary search */
-const struct exception_table_entry *
-search_extable(const struct exception_table_entry *first,
- const struct exception_table_entry *last,
- unsigned long value)
-{
- const struct exception_table_entry *mid;
-
- mid = check_exception_ranges(value);
- if (mid)
- return mid;
-
- while (first <= last) {
- long diff;
-
- mid = (last - first) / 2 + first;
- diff = mid->insn - value;
- if (diff == 0)
- return mid;
- else if (diff < 0)
- first = mid+1;
- else
- last = mid-1;
- }
-
- return NULL;
-}
-
-int fixup_exception(struct pt_regs *regs)
-{
- const struct exception_table_entry *fixup;
-
- fixup = search_exception_tables(regs->pc);
- if (fixup) {
- regs->pc = fixup->fixup;
- return 1;
- }
-
- return 0;
-}
-