• Jon Medhurst's avatar
    ARM: Thumb-2: Support Thumb-2 in undefined instruction handler · 592201a9
    Jon Medhurst authored
    
    
    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: default avatarJon Medhurst <tixy@yxit.co.uk>
    Acked-by: default avatarNicolas Pitre <nicolas.pitre@linaro.org>
    592201a9
ptrace.h 6.24 KB