Commit ce147c74 authored Apr 06, 2013 by Vineet Gupta

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>

parent c723ea46

arch/arc/kernel/entry.S

+3 −1

Original line number	Diff line number	Diff line
		@@ -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