int __kprobes kprobe_exceptions_notify()

in kernel/kprobes.c [864:891]

• 24 lines of code
• 10 McCabe index (conditional complexity)

int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
				       unsigned long val, void *data)
{
	struct die_args *args = (struct die_args *)data;
	int ret = NOTIFY_DONE;

	if (args->regs && user_mode(args->regs))
		return ret;

	switch(val) {
	case DIE_BREAK:
		/* err is break number from ia64_bad_break() */
		if ((args->err >> 12) == (__IA64_BREAK_KPROBE >> 12)
			|| args->err == 0)
			if (pre_kprobes_handler(args))
				ret = NOTIFY_STOP;
		break;
	case DIE_FAULT:
		/* err is vector number from ia64_fault() */
		if (args->err == 36)
			if (post_kprobes_handler(args->regs))
				ret = NOTIFY_STOP;
		break;
	default:
		break;
	}
	return ret;
}