sh: Flag T-bit for syscall restart. (f8b890ab) · Commits · EulixOS / Software / Kernel

arch/sh/kernel/signal_32.c

+31 −22

Original line number	Diff line number	Diff line
		@@ -490,38 +490,44 @@ static int setup_rt_frame(int sig, struct k_sigaction ka, siginfo_t info,
		return -EFAULT;
		}

		/*
		* OK, we're invoking a handler
		*/

		static int
		handle_signal(unsigned long sig, struct k_sigaction ka, siginfo_t info,
		sigset_t oldset, struct pt_regs regs, unsigned int save_r0)
		static inline void
		handle_syscall_restart(unsigned long save_r0, struct pt_regs *regs,
		struct sigaction *sa)
		{
		int ret;
		/* If we're not from a syscall, bail out */
		if (regs->tra < 0)
		return;

		/* Are we from a system call? */
		if (regs->tra >= 0) {
		/* If so, check system call restarting.. */
		/* check for system call restart.. */
		switch (regs->regs[0]) {
		case -ERESTART_RESTARTBLOCK:
		case -ERESTARTNOHAND:
		no_system_call_restart:
		regs->regs[0] = -EINTR;
		regs->sr \|= 1;
		break;

		case -ERESTARTSYS:
		if (!(ka->sa.sa_flags & SA_RESTART))
		if (!(sa->sa_flags & SA_RESTART))
		goto no_system_call_restart;
		/* fallthrough */
		case -ERESTARTNOINTR:
		regs->regs[0] = save_r0;
		regs->pc -= instruction_size(
		ctrl_inw(regs->pc - 4));
		regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
		break;
		}
		}

		/*
		* OK, we're invoking a handler
		*/
		static int
		handle_signal(unsigned long sig, struct k_sigaction ka, siginfo_t info,
		sigset_t oldset, struct pt_regs regs, unsigned int save_r0)
		{
		int ret;


		/* Set up the stack frame */
		if (ka->sa.sa_flags & SA_SIGINFO)
		ret = setup_rt_frame(sig, ka, info, oldset, regs);
		@@ -578,6 +584,9 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)

		signr = get_signal_to_deliver(&info, &ka, regs, NULL);
		if (signr > 0) {
		if (regs->sr & 1)
		handle_syscall_restart(save_r0, regs, &ka.sa);

		/* Whee! Actually deliver the signal. */
		if (handle_signal(signr, &ka, &info, oldset,
		regs, save_r0) == 0) {