• Pratyush Anand's avatar
    arm64: Allow hw watchpoint at varied offset from base address · b08fb180
    Pratyush Anand authored
    ARM64 hardware supports watchpoint at any double word aligned address.
    However, it can select any consecutive bytes from offset 0 to 7 from that
    base address. For example, if base address is programmed as 0x420030 and
    byte select is 0x1C, then access of 0x420032,0x420033 and 0x420034 will
    generate a watchpoint exception.
    
    Currently, we do not have such modularity. We can only program byte,
    halfword, word and double word access exception from any base address.
    
    This patch adds support to overcome above limitations.
    Signed-off-by: default avatarPratyush Anand <panand@redhat.com>
    Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
    b08fb180
ptrace.c 33.9 KB