diff --git a/lib/libthr/thread/thr_subr.c b/lib/libthr/thread/thr_subr.c
new file mode 100644
index 000000000000..c777d177ccee
--- /dev/null
+++ b/lib/libthr/thread/thr_subr.c
@@ -0,0 +1,91 @@
+/*-
+ * Copyright (c) 2003 Michael Telahun Makonnen
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	Problems/Questions to: Mike Makonnen <mtm@FreeBSD.Org>
+ *
+ * $FreeBSD$
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <pthread.h>
+
+#include "thr_private.h"
+
+/*
+ * Lock for the process global signal actions list.
+ * This lock does NOT insure up-to-date-ness, only integrity.
+ */
+struct umtx sigactList_lock = UMTX_INITIALIZER;
+
+/*
+ * proc_sigact_copyin(sig, actp)
+ *	Copy the contents of actp into the process global
+ *	action for signal sig.
+ */
+void
+proc_sigact_copyin(int sig, const struct sigaction *actp)
+{
+	UMTX_LOCK(&sigactList_lock);
+	bcopy((const void *)actp, (void *)&_thread_sigact[sig - 1],
+	    sizeof(struct sigaction));
+	UMTX_UNLOCK(&sigactList_lock);
+}
+
+/*
+ * proc_sigact_copyout(sig, sigact)
+ *	Copy the contents of the process global action for
+ *	signal sig into sigact.
+ */
+void
+proc_sigact_copyout(int sig, struct sigaction *actp)
+{
+	UMTX_LOCK(&sigactList_lock);
+	bcopy((const void *)&_thread_sigact[sig - 1], (void *)actp,
+	    sizeof(struct sigaction));
+	UMTX_UNLOCK(&sigactList_lock);
+}
+
+/*
+ * proc_sigact_sigaction(sig)
+ *	Obtains the struct sigaction associated with signal sig.
+ *	The address of the structure is the return value. It is
+ *	upto the caller to check the value of the structure at
+ *	that address against SIG_IGN and SIG_DFL before trying
+ *	to dereference it.
+ */
+struct sigaction *
+proc_sigact_sigaction(int sig)
+{
+	struct sigaction *actp;
+
+	UMTX_LOCK(&sigactList_lock);
+	actp = &_thread_sigact[sig - 1];
+	UMTX_UNLOCK(&sigactList_lock);
+	return (actp);
+}