diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2013-04-06 17:11:58 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-05-07 13:43:55 +0530 |
| commit | ce147c7445c28fcf38813f62b2a2bb1266db9ef4 (patch) | |
| tree | 6c55d139cd6b38ba3368e18b326c0304216f6f4a /arch/arc | |
| parent | c723ea4620a67fb0dbed5f5c33183543799e2177 (diff) | |
| download | linux-ce147c7445c28fcf38813f62b2a2bb1266db9ef4.tar.gz linux-ce147c7445c28fcf38813f62b2a2bb1266db9ef4.tar.bz2 linux-ce147c7445c28fcf38813f62b2a2bb1266db9ef4.zip | |
ARC: unaligned access emulation broken if callee-reg dest of LD/ST
The fixup code correctly updates the callee-regs on stack, but
fails to unwind it into actual register file. Thus userspace won't see
the update.
Reported-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/kernel/entry.S | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index 666a486f1e7b..0c6d664d4a83 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -396,7 +396,9 @@ ARC_ENTRY EV_TLBProtV bl do_misaligned_access - DISCARD_CALLEE_SAVED_USER + ; TBD: optimize - do this only if a callee reg was involved + ; either a dst of emulated LD/ST or src with address-writeback + RESTORE_CALLEE_SAVED_USER #else bl do_misaligned_error #endif |