tree e177ebb35bab0d1bfa2608335b4cd6d51bc3ecfb
parent 594810621d9605dd40b6ce42e2e188a7dd6ba27c
author Jon Medhurst <tixy@yxit.co.uk> 1301167147 +0000
committer Tixy <tixy@medhuaa1.miniserver.com> 1310578360 +0000

ARM: Thumb-2: Support Thumb-2 in undefined instruction handler

This patch allows undef_hook's to be specified for 32-bit Thumb
instructions and also to be used for thumb kernel-side code.

32-bit Thumb instructions are specified in the form:
	((first_half << 16 ) | second_half)
which matches the layout used by the ARM ARM.

ptrace was handling 32-bit Thumb instructions by hooking the first
halfword and manually checking the second half. This method would be
broken by this patch so it is migrated to make use of the new Thumb-2
support.

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>