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    Subject[PATCH 2/3] powerpc: Bail out of KGDB when we've been triggered
    Date
    We need to skip a breakpoint exception when it occurs after
    a breakpoint has already been removed.

    Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
    ---
    arch/powerpc/kernel/kgdb.c | 18 ++++++++++++++++++
    1 files changed, 18 insertions(+), 0 deletions(-)

    diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c
    index bbabc5a..e84252b 100644
    --- a/arch/powerpc/kernel/kgdb.c
    +++ b/arch/powerpc/kernel/kgdb.c
    @@ -101,6 +101,24 @@ static int computeSignal(unsigned int tt)
    return SIGHUP; /* default for things we don't know about */
    }

    +/**
    + *
    + * kgdb_skipexception - Bail out of KGDB when we've been triggered.
    + * @exception: Exception vector number
    + * @regs: Current &struct pt_regs.
    + *
    + * On some architectures we need to skip a breakpoint exception when
    + * it occurs after a breakpoint has been removed.
    + *
    + */
    +int kgdb_skipexception(int exception, struct pt_regs *regs)
    +{
    + if (kgdb_isremovedbreak(regs->nip))
    + return 1;
    +
    + return 0;
    +}
    +
    static int kgdb_call_nmi_hook(struct pt_regs *regs)
    {
    kgdb_nmicallback(raw_smp_processor_id(), regs);
    --
    1.5.6


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