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    Subject[PATCH v5 3.1.0-rc4-tip 14/26] uprobe: register exception notifier

    Use the notifier mechanism to register uprobes exception notifier.

    Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
    Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
    ---
    kernel/uprobes.c | 18 ++++++++++++++++++
    1 files changed, 18 insertions(+), 0 deletions(-)

    diff --git a/kernel/uprobes.c b/kernel/uprobes.c
    index 8b6654e..083c577 100644
    --- a/kernel/uprobes.c
    +++ b/kernel/uprobes.c
    @@ -30,6 +30,7 @@
    #include <linux/mmu_notifier.h> /* set_pte_at_notify */
    #include <linux/swap.h> /* try_to_free_swap */
    #include <linux/ptrace.h> /* user_enable_single_step */
    +#include <linux/kdebug.h> /* notifier mechanism */
    #include <linux/uprobes.h>

    static struct rb_root uprobes_tree = RB_ROOT;
    @@ -1209,3 +1210,20 @@ int uprobe_post_notifier(struct pt_regs *regs)
    set_thread_flag(TIF_UPROBE);
    return 1;
    }
    +
    +struct notifier_block uprobe_exception_nb = {
    + .notifier_call = uprobe_exception_notify,
    + .priority = INT_MAX - 1, /* notified after kprobes, kgdb */
    +};
    +
    +static int __init init_uprobes(void)
    +{
    + return register_die_notifier(&uprobe_exception_nb);
    +}
    +
    +static void __exit exit_uprobes(void)
    +{
    +}
    +
    +module_init(init_uprobes);
    +module_exit(exit_uprobes);

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