Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4252c659a4e7f4260e4bdc87538578236c51ab2d
Commit: 4252c659a4e7f4260e4bdc87538578236c51ab2d
Parent: 1e6760c5c4589d02a6877fb256b99c33dd8f1ede
Author: Magnus Damm <[EMAIL PROTECTED]>
AuthorDate: Thu Feb 7 19:58:46 2008 +0900
Committer: Paul Mundt <[EMAIL PROTECTED]>
CommitDate: Thu Feb 14 14:22:09 2008 +0900
sh: add byte support to the sign extension code
This patch adds byte support to the sign extension code. Unaligned access
traps should never be generated on 8-bit io operations, but we will use this
code for trapped io and we do need byte support there.
Signed-off-by: Magnus Damm <[EMAIL PROTECTED]>
Signed-off-by: Paul Mundt <[EMAIL PROTECTED]>
---
arch/sh/kernel/traps_32.c | 12 +++++++++++-
1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index 7154a7b..2e7dd2e 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -150,14 +150,24 @@ static int die_if_no_fixup(const char * str, struct
pt_regs * regs, long err)
static inline void sign_extend(unsigned int count, unsigned char *dst)
{
#ifdef __LITTLE_ENDIAN__
+ if ((count == 1) && dst[0] & 0x80) {
+ dst[1] = 0xff;
+ dst[2] = 0xff;
+ dst[3] = 0xff;
+ }
if ((count == 2) && dst[1] & 0x80) {
dst[2] = 0xff;
dst[3] = 0xff;
}
#else
- if ((count == 2) && dst[2] & 0x80) {
+ if ((count == 1) && dst[3] & 0x80) {
+ dst[2] = 0xff;
+ dst[1] = 0xff;
dst[0] = 0xff;
+ }
+ if ((count == 2) && dst[2] & 0x80) {
dst[1] = 0xff;
+ dst[0] = 0xff;
}
#endif
}
-
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