static void handle_signal()

in kernel/signal.c [177:213]

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

static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
	sigset_t *oldset = sigmask_to_save();
	int ret;

	rseq_signal_deliver(ksig, regs);

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

		/* If so, check system call restarting.. */
		switch (regs->a0) {
		case -ERESTART_RESTARTBLOCK:
		case -ERESTARTNOHAND:
			regs->a0 = -EINTR;
			break;

		case -ERESTARTSYS:
			if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
				regs->a0 = -EINTR;
				break;
			}
			fallthrough;
		case -ERESTARTNOINTR:
			regs->a0 = regs->orig_a0;
			regs->pc -= TRAP0_SIZE;
			break;
		}
	}

	/* Set up the stack frame */
	ret = setup_rt_frame(ksig, oldset, regs);

	signal_setup_done(ret, ksig, 0);
}