static void do_signal()

in kernel/signal.c [215:251]

• 25 lines of code
• 7 McCabe index (conditional complexity)

static void do_signal(struct pt_regs *regs)
{
	struct ksignal ksig;

	if (get_signal(&ksig)) {
		/* Actually deliver the signal */
		handle_signal(&ksig, regs);
		return;
	}

	/* Did we come from a system call? */
	if (in_syscall(regs)) {
		/* Avoid additional syscall restarting via ret_from_exception */
		forget_syscall(regs);

		/* Restart the system call - no handlers present */
		switch (regs->a0) {
		case -ERESTARTNOHAND:
		case -ERESTARTSYS:
		case -ERESTARTNOINTR:
			regs->a0 = regs->orig_a0;
			regs->pc -= TRAP0_SIZE;
			break;
		case -ERESTART_RESTARTBLOCK:
			regs->a0 = regs->orig_a0;
			regs_syscallid(regs) = __NR_restart_syscall;
			regs->pc -= TRAP0_SIZE;
			break;
		}
	}

	/*
	 * If there is no signal to deliver, we just put the saved
	 * sigmask back.
	 */
	restore_saved_sigmask();
}