• Heiko Carstens's avatar
    [S390] debug: enable exception-trace debug facility · ab3c68ee
    Heiko Carstens authored
    
    
    The exception-trace facility on x86 and other architectures prints
    traces to dmesg whenever a user space application crashes.
    s390 has such a feature since ages however it is called
    userprocess_debug and is enabled differently.
    This patch makes sure that whenever one of the two procfs files
    
    /proc/sys/kernel/userprocess_debug
    /proc/sys/debug/exception-trace
    
    is modified the contents of the second one changes as well.
    That way we keep backwards compatibilty but also support the same
    interface like other architectures do.
    Besides that the output of the traces is improved since it will now
    also contain the corresponding filename of the vma (when available)
    where the process caused a fault or trap.
    Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
    Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
    ab3c68ee