Beispiel #1
0
static int do_signal(struct pt_regs *regs)
{
	sigset_t *oldset;
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

	if (current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK)
		oldset = &current->saved_sigmask;
	else
		oldset = &current->blocked;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		struct thread_info *ti = current_thread_info();
		
		if (ti->local_flags & _TLF_RESTORE_SIGMASK) {
			ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
		}
		regs->trap = 0;
		return 0;               
	}

#ifndef CONFIG_PPC_ADV_DEBUG_REGS
	if (current->thread.dabr)
		set_dabr(current->thread.dabr);
#endif
	
	thread_change_pc(current, regs);

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	regs->trap = 0;
	if (ret) {
		block_sigmask(&ka, signr);

		current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;

		tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}
Beispiel #2
0
static int do_signal(struct pt_regs *regs)
{
	sigset_t *oldset = sigmask_to_save();
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	/* Is there any syscall restart business here ? */
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		/* No signal to deliver -- put the saved sigmask back */
		restore_saved_sigmask();
		regs->trap = 0;
		return 0;               /* no signals delivered */
	}

#ifndef CONFIG_PPC_ADV_DEBUG_REGS
        /*
	 * Reenable the DABR before delivering the signal to
	 * user space. The DABR will have been cleared if it
	 * triggered inside the kernel.
	 */
	if (current->thread.hw_brk.address &&
		current->thread.hw_brk.type)
		set_breakpoint(&current->thread.hw_brk);
#endif
	/* Re-enable the breakpoints for the signal stack */
	thread_change_pc(current, regs);

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	regs->trap = 0;
	if (ret) {
		signal_delivered(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}
Beispiel #3
0
/*
 * Note that 'init' is a special process: it doesn't get signals it doesn't
 * want to handle. Thus you cannot kill init even with a SIGKILL even by
 * mistake.
 *
 * Note that we go through the signals twice: once to check the signals that
 * the kernel can handle, and then we build all the user-level signal handling
 * stack-frames in one go after that.
 */
void do_signal(struct pt_regs *regs)
{
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	sigset_t *oldset = sigmask_to_save();

	/*
	 * Get signal to deliver. When running under ptrace, at this point
	 * the debugger may change all our registers, including the system
	 * call information.
	 */
	current_thread_info()->system_call =
		test_thread_flag(TIF_SYSCALL) ? regs->int_code : 0;
	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	if (signr > 0) {
		/* Whee!  Actually deliver the signal.  */
		if (current_thread_info()->system_call) {
			regs->int_code = current_thread_info()->system_call;
			/* Check for system call restarting. */
			switch (regs->gprs[2]) {
			case -ERESTART_RESTARTBLOCK:
			case -ERESTARTNOHAND:
				regs->gprs[2] = -EINTR;
				break;
			case -ERESTARTSYS:
				if (!(ka.sa.sa_flags & SA_RESTART)) {
					regs->gprs[2] = -EINTR;
					break;
				}
			/* fallthrough */
			case -ERESTARTNOINTR:
				regs->gprs[2] = regs->orig_gpr2;
				regs->psw.addr =
					__rewind_psw(regs->psw,
						     regs->int_code >> 16);
				break;
			}
		}
		/* No longer in a system call */
		clear_thread_flag(TIF_SYSCALL);

		if (is_compat_task())
			handle_signal32(signr, &ka, &info, oldset, regs);
		else
			handle_signal(signr, &ka, &info, oldset, regs);
		return;
	}
Beispiel #4
0
int do_signal(sigset_t *oldset, struct pt_regs *regs)
{
    siginfo_t info;
    int signr;
    struct k_sigaction ka;
    int ret;
    int is32 = is_32bit_task();

    if (test_thread_flag(TIF_RESTORE_SIGMASK))
        oldset = &current->saved_sigmask;
    else if (!oldset)
        oldset = &current->blocked;

    signr = get_signal_to_deliver(&info, &ka, regs, NULL);

    /* Is there any syscall restart business here ? */
    check_syscall_restart(regs, &ka, signr > 0);

    if (signr <= 0) {
        /* No signal to deliver -- put the saved sigmask back */
        if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
            clear_thread_flag(TIF_RESTORE_SIGMASK);
            sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
        }
        return 0;               /* no signals delivered */
    }

    /*
    * Reenable the DABR before delivering the signal to
     * user space. The DABR will have been cleared if it
     * triggered inside the kernel.
     */
    if (current->thread.dabr)
        set_dabr(current->thread.dabr);

    if (is32) {
        if (ka.sa.sa_flags & SA_SIGINFO)
            ret = handle_rt_signal32(signr, &ka, &info, oldset,
                                     regs);
        else
            ret = handle_signal32(signr, &ka, &info, oldset,
                                  regs);
    } else {
        ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
    }

    if (ret) {
        spin_lock_irq(&current->sighand->siglock);
        sigorsets(&current->blocked, &current->blocked,
                  &ka.sa.sa_mask);
        if (!(ka.sa.sa_flags & SA_NODEFER))
            sigaddset(&current->blocked, signr);
        recalc_sigpending();
        spin_unlock_irq(&current->sighand->siglock);

        /*
         * A signal was successfully delivered; the saved sigmask is in
         * its frame, and we can clear the TIF_RESTORE_SIGMASK flag.
         */
        if (test_thread_flag(TIF_RESTORE_SIGMASK))
            clear_thread_flag(TIF_RESTORE_SIGMASK);
    }

    return ret;
}
Beispiel #5
0
static int do_signal_pending(sigset_t *oldset, struct pt_regs *regs)
{
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

#ifdef CONFIG_PREEMPT_RT
	/*
	 * Fully-preemptible kernel does not need interrupts disabled:
	 */
	local_irq_enable();
	preempt_check_resched();
#endif

	if (current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK)
		oldset = &current->saved_sigmask;
	else if (!oldset)
		oldset = &current->blocked;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	/* Is there any syscall restart business here ? */
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		struct thread_info *ti = current_thread_info();
		/* No signal to deliver -- put the saved sigmask back */
		if (ti->local_flags & _TLF_RESTORE_SIGMASK) {
			ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
		}
		return 0;               /* no signals delivered */
	}

        /*
	 * Reenable the DABR before delivering the signal to
	 * user space. The DABR will have been cleared if it
	 * triggered inside the kernel.
	 */
	if (current->thread.dabr) {
		set_dabr(current->thread.dabr);
#if defined(CONFIG_BOOKE)
		mtspr(SPRN_DBCR0, current->thread.dbcr0);
#endif
	}

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	if (ret) {
		spin_lock_irq(&current->sighand->siglock);
		sigorsets(&current->blocked, &current->blocked,
			  &ka.sa.sa_mask);
		if (!(ka.sa.sa_flags & SA_NODEFER))
			sigaddset(&current->blocked, signr);
		recalc_sigpending();
		spin_unlock_irq(&current->sighand->siglock);

		/*
		 * A signal was successfully delivered; the saved sigmask is in
		 * its frame, and we can clear the TLF_RESTORE_SIGMASK flag.
		 */
		current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;

		/*
		 * Let tracing know that we've done the handler setup.
		 */
		tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}
Beispiel #6
0
/*
 * Note that 'init' is a special process: it doesn't get signals it doesn't
 * want to handle. Thus you cannot kill init even with a SIGKILL even by
 * mistake.
 *
 * Note that we go through the signals twice: once to check the signals that
 * the kernel can handle, and then we build all the user-level signal handling
 * stack-frames in one go after that.
 */
void do_signal(struct pt_regs *regs)
{
	unsigned long retval = 0, continue_addr = 0, restart_addr = 0;
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	sigset_t *oldset;

	/*
	 * We want the common case to go fast, which
	 * is why we may in certain cases get here from
	 * kernel mode. Just return without doing anything
	 * if so.
	 */
	if (!user_mode(regs))
		return;

	if (test_thread_flag(TIF_RESTORE_SIGMASK))
		oldset = &current->saved_sigmask;
	else
		oldset = &current->blocked;

	/* Are we from a system call? */
	if (regs->svcnr) {
		continue_addr = regs->psw.addr;
		restart_addr = continue_addr - regs->ilc;
		retval = regs->gprs[2];

		/* Prepare for system call restart.  We do this here so that a
		   debugger will see the already changed PSW. */
		switch (retval) {
		case -ERESTARTNOHAND:
		case -ERESTARTSYS:
		case -ERESTARTNOINTR:
			regs->gprs[2] = regs->orig_gpr2;
			regs->psw.addr = restart_addr;
			break;
		case -ERESTART_RESTARTBLOCK:
			regs->gprs[2] = -EINTR;
		}
		regs->svcnr = 0;	/* Don't deal with this again. */
	}

	/* Get signal to deliver.  When running under ptrace, at this point
	   the debugger may change all our registers ... */
	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	/* Depending on the signal settings we may need to revert the
	   decision to restart the system call. */
	if (signr > 0 && regs->psw.addr == restart_addr) {
		if (retval == -ERESTARTNOHAND
		    || (retval == -ERESTARTSYS
			 && !(current->sighand->action[signr-1].sa.sa_flags
			      & SA_RESTART))) {
			regs->gprs[2] = -EINTR;
			regs->psw.addr = continue_addr;
		}
	}

	if (signr > 0) {
		/* Whee!  Actually deliver the signal.  */
		int ret;
#ifdef CONFIG_COMPAT
		if (test_thread_flag(TIF_31BIT)) {
			ret = handle_signal32(signr, &ka, &info, oldset, regs);
	        }
		else
#endif
			ret = handle_signal(signr, &ka, &info, oldset, regs);
		if (!ret) {
			/*
			 * A signal was successfully delivered; the saved
			 * sigmask will have been stored in the signal frame,
			 * and will be restored by sigreturn, so we can simply
			 * clear the TIF_RESTORE_SIGMASK flag.
			 */
			if (test_thread_flag(TIF_RESTORE_SIGMASK))
				clear_thread_flag(TIF_RESTORE_SIGMASK);

			/*
			 * If we would have taken a single-step trap
			 * for a normal instruction, act like we took
			 * one for the handler setup.
			 */
			if (current->thread.per_info.single_step)
				set_thread_flag(TIF_SINGLE_STEP);

			/*
			 * Let tracing know that we've done the handler setup.
			 */
			tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLE_STEP));
		}
		return;
	}

	/*
	 * If there's no signal to deliver, we just put the saved sigmask back.
	 */
	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
		clear_thread_flag(TIF_RESTORE_SIGMASK);
		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
	}

	/* Restart a different system call. */
	if (retval == -ERESTART_RESTARTBLOCK
	    && regs->psw.addr == continue_addr) {
		regs->gprs[2] = __NR_restart_syscall;
		set_thread_flag(TIF_RESTART_SVC);
	}
}
Beispiel #7
0
static int do_signal(struct pt_regs *regs)
{
	sigset_t *oldset;
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

	if (current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK)
		oldset = &current->saved_sigmask;
	else
		oldset = &current->blocked;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	/* Is there any syscall restart business here ? */
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		struct thread_info *ti = current_thread_info();
		/* No signal to deliver -- put the saved sigmask back */
		if (ti->local_flags & _TLF_RESTORE_SIGMASK) {
			ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
		}
		regs->trap = 0;
		return 0;               /* no signals delivered */
	}

#ifndef CONFIG_PPC_ADV_DEBUG_REGS
        /*
	 * Reenable the DABR before delivering the signal to
	 * user space. The DABR will have been cleared if it
	 * triggered inside the kernel.
	 */
	if (current->thread.dabr)
		set_dabr(current->thread.dabr);
#endif
	/* Re-enable the breakpoints for the signal stack */
	thread_change_pc(current, regs);

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	regs->trap = 0;
	if (ret) {
		block_sigmask(&ka, signr);

		/*
		 * A signal was successfully delivered; the saved sigmask is in
		 * its frame, and we can clear the TLF_RESTORE_SIGMASK flag.
		 */
		current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;

		/*
		 * Let tracing know that we've done the handler setup.
		 */
		tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}
/*
 * Note that 'init' is a special process: it doesn't get signals it doesn't
 * want to handle. Thus you cannot kill init even with a SIGKILL even by
 * mistake.
 *
 * Note that we go through the signals twice: once to check the signals that
 * the kernel can handle, and then we build all the user-level signal handling
 * stack-frames in one go after that.
 */
void do_signal(struct pt_regs *regs)
{
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	sigset_t *oldset;

	/*
	 * We want the common case to go fast, which
	 * is why we may in certain cases get here from
	 * kernel mode. Just return without doing anything
	 * if so.
	 */
	if (!user_mode(regs))
		return;

	if (test_thread_flag(TIF_RESTORE_SIGMASK))
		oldset = &current->saved_sigmask;
	else
		oldset = &current->blocked;

	/*
	 * Get signal to deliver. When running under ptrace, at this point
	 * the debugger may change all our registers, including the system
	 * call information.
	 */
	current_thread_info()->system_call =
		test_thread_flag(TIF_SYSCALL) ? regs->int_code : 0;
	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	if (signr > 0) {
		/* Whee!  Actually deliver the signal.  */
		if (current_thread_info()->system_call) {
			regs->int_code = current_thread_info()->system_call;
			/* Check for system call restarting. */
			switch (regs->gprs[2]) {
			case -ERESTART_RESTARTBLOCK:
			case -ERESTARTNOHAND:
				regs->gprs[2] = -EINTR;
				break;
			case -ERESTARTSYS:
				if (!(ka.sa.sa_flags & SA_RESTART)) {
					regs->gprs[2] = -EINTR;
					break;
				}
			/* fallthrough */
			case -ERESTARTNOINTR:
				regs->gprs[2] = regs->orig_gpr2;
				regs->psw.addr =
					__rewind_psw(regs->psw,
						     regs->int_code >> 16);
				break;
			}
		}
		/* No longer in a system call */
		clear_thread_flag(TIF_SYSCALL);

		if ((is_compat_task() ?
		     handle_signal32(signr, &ka, &info, oldset, regs) :
		     handle_signal(signr, &ka, &info, oldset, regs)) == 0) {
			/*
			 * A signal was successfully delivered; the saved
			 * sigmask will have been stored in the signal frame,
			 * and will be restored by sigreturn, so we can simply
			 * clear the TIF_RESTORE_SIGMASK flag.
			 */
			if (test_thread_flag(TIF_RESTORE_SIGMASK))
				clear_thread_flag(TIF_RESTORE_SIGMASK);

			/*
			 * Let tracing know that we've done the handler setup.
			 */
			tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLE_STEP));
		}
		return;
	}
Beispiel #9
0
/*
 * Note that 'init' is a special process: it doesn't get signals it doesn't
 * want to handle. Thus you cannot kill init even with a SIGKILL even by
 * mistake.
 *
 * Note that we go through the signals twice: once to check the signals that
 * the kernel can handle, and then we build all the user-level signal handling
 * stack-frames in one go after that.
 */
int do_signal(struct pt_regs *regs, sigset_t *oldset)
{
	unsigned long retval = 0, continue_addr = 0, restart_addr = 0;
	siginfo_t info;
	int signr;

	/*
	 * We want the common case to go fast, which
	 * is why we may in certain cases get here from
	 * kernel mode. Just return without doing anything
	 * if so.
	 */
	if (!user_mode(regs))
		return 1;

	if (!oldset)
		oldset = &current->blocked;

	/* Are we from a system call? */
	if (regs->trap == __LC_SVC_OLD_PSW) {
		continue_addr = regs->psw.addr;
		restart_addr = continue_addr - regs->ilc;
		retval = regs->gprs[2];

		/* Prepare for system call restart.  We do this here so that a
		   debugger will see the already changed PSW. */
		if (retval == -ERESTARTNOHAND ||
		    retval == -ERESTARTSYS ||
		    retval == -ERESTARTNOINTR) {
			regs->gprs[2] = regs->orig_gpr2;
			regs->psw.addr = restart_addr;
		} else if (retval == -ERESTART_RESTARTBLOCK) {
			regs->gprs[2] = -EINTR;
		}
	}

	/* Get signal to deliver.  When running under ptrace, at this point
	   the debugger may change all our registers ... */
	signr = get_signal_to_deliver(&info, regs, NULL);

	/* Depending on the signal settings we may need to revert the
	   decision to restart the system call. */
	if (signr > 0 && regs->psw.addr == restart_addr) {
		if (retval == -ERESTARTNOHAND
		    || (retval == -ERESTARTSYS
			 && !(current->sighand->action[signr-1].sa.sa_flags
			      & SA_RESTART))) {
			regs->gprs[2] = -EINTR;
			regs->psw.addr = continue_addr;
		}
	}

	if (signr > 0) {
		/* Whee!  Actually deliver the signal.  */
#ifdef CONFIG_S390_SUPPORT
		if (test_thread_flag(TIF_31BIT)) {
			extern void handle_signal32(unsigned long sig,
						    siginfo_t *info,
						    sigset_t *oldset,
						    struct pt_regs *regs);
			handle_signal32(signr, &info, oldset, regs);
			return 1;
	        }
#endif
		handle_signal(signr, &info, oldset, regs);
		return 1;
	}

	/* Restart a different system call. */
	if (retval == -ERESTART_RESTARTBLOCK
	    && regs->psw.addr == continue_addr) {
		regs->gprs[2] = __NR_restart_syscall;
		set_thread_flag(TIF_RESTART_SVC);
	}
	return 0;
}
/*
 * Note that 'init' is a special process: it doesn't get signals it doesn't
 * want to handle. Thus you cannot kill init even with a SIGKILL even by
 * mistake.
 *
 * Note that we go through the signals twice: once to check the signals that
 * the kernel can handle, and then we build all the user-level signal handling
 * stack-frames in one go after that.
 */
int do_signal32(struct pt_regs *regs, sigset_t *oldset)
{
	siginfo_t info;
	struct k_sigaction *ka;

	/*
	 * We want the common case to go fast, which
	 * is why we may in certain cases get here from
	 * kernel mode. Just return without doing anything
	 * if so.
	 */
	if (!user_mode(regs))
		return 1;

	if (!oldset)
		oldset = &current->blocked;

	for (;;) {
		unsigned long signr;

		spin_lock_irq(&current->sigmask_lock);
		signr = dequeue_signal(&current->blocked, &info);
		spin_unlock_irq(&current->sigmask_lock);

		if (!signr)
			break;

		if ((current->ptrace & PT_PTRACED) && signr != SIGKILL) {
			/* Let the debugger run.  */
			current->exit_code = signr;
			set_current_state(TASK_STOPPED);
			notify_parent(current, SIGCHLD);
			schedule();

			/* We're back.  Did the debugger cancel the sig?  */
			if (!(signr = current->exit_code))
				continue;
			current->exit_code = 0;

			/* The debugger continued.  Ignore SIGSTOP.  */
			if (signr == SIGSTOP)
				continue;

			/* Update the siginfo structure.  Is this good?  */
			if (signr != info.si_signo) {
				info.si_signo = signr;
				info.si_errno = 0;
				info.si_code = SI_USER;
				info.si_pid = current->p_pptr->pid;
				info.si_uid = current->p_pptr->uid;
			}

			/* If the (new) signal is now blocked, requeue it.  */
			if (sigismember(&current->blocked, signr)) {
				send_sig_info(signr, &info, current);
				continue;
			}
		}

		ka = &current->sig->action[signr-1];
		if (ka->sa.sa_handler == SIG_IGN) {
			if (signr != SIGCHLD)
				continue;
			/* Check for SIGCHLD: it's special.  */
			while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
				/* nothing */;
			continue;
		}

		if (ka->sa.sa_handler == SIG_DFL) {
			int exit_code = signr;

			/* Init gets no signals it doesn't want.  */
			if (current->pid == 1)
				continue;

			switch (signr) {
			case SIGCONT: case SIGCHLD: case SIGWINCH: case SIGURG:
				continue;

			case SIGTSTP: case SIGTTIN: case SIGTTOU:
				if (is_orphaned_pgrp(current->pgrp))
					continue;
				/* FALLTHRU */

			case SIGSTOP:
				set_current_state(TASK_STOPPED);
				current->exit_code = signr;
				if (!(current->p_pptr->sig->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDSTOP))
					notify_parent(current, SIGCHLD);
				schedule();
				continue;

			case SIGQUIT: case SIGILL: case SIGTRAP:
			case SIGABRT: case SIGFPE: case SIGSEGV:
			case SIGBUS: case SIGSYS: case SIGXCPU: case SIGXFSZ:
                                if (do_coredump(signr, regs))
                                        exit_code |= 0x80;
                                /* FALLTHRU */

			default:
				sig_exit(signr, exit_code, &info);
				/* NOTREACHED */
			}
		}

		/* Whee!  Actually deliver the signal.  */
		handle_signal32(signr, ka, &info, oldset, regs);
		return 1;
	}

	/* Did we come from a system call? */
	if ( regs->trap == __LC_SVC_OLD_PSW /* System Call! */ ) {
		/* Restart the system call - no handlers present */
		if (regs->gprs[2] == -ERESTARTNOHAND ||
		    regs->gprs[2] == -ERESTARTSYS ||
		    regs->gprs[2] == -ERESTARTNOINTR) {
			regs->gprs[2] = regs->orig_gpr2;
			regs->psw.addr -= 2;
		}
	}
	return 0;
}