diff --git a/lib/libspl/Makefile.am b/lib/libspl/Makefile.am
index c18b67551a..91e166d6c3 100644
--- a/lib/libspl/Makefile.am
+++ b/lib/libspl/Makefile.am
@@ -14,6 +14,7 @@ libspl_la_SOURCES = \
 	${top_srcdir}/lib/libspl/strlcat.c \
 	${top_srcdir}/lib/libspl/strlcpy.c \
 	${top_srcdir}/lib/libspl/strnlen.c \
+	${top_srcdir}/lib/libspl/strtoxx.c \
 	${top_srcdir}/lib/libspl/u8_textprep.c \
 	${top_srcdir}/lib/libspl/zone.c \
 	${top_srcdir}/lib/libspl/include/sys/list.h \
diff --git a/lib/libspl/include/sys/sunddi.h b/lib/libspl/include/sys/sunddi.h
new file mode 100644
index 0000000000..5d28fe7737
--- /dev/null
+++ b/lib/libspl/include/sys/sunddi.h
@@ -0,0 +1,34 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2008 by Sun Microsystems, Inc.
+ */
+
+#ifndef	_SYS_SUNDDI_H
+#define	_SYS_SUNDDI_H
+
+extern int ddi_strtoul(const char *, char **, int, unsigned long *);
+extern int ddi_strtol(const char *, char **, int, long *);
+extern int ddi_strtoull(const char *, char **, int, unsigned long long *);
+extern int ddi_strtoll(const char *, char **, int, long long *);
+
+#endif	/* _SYS_SUNDDI_H */
diff --git a/lib/libspl/strtoxx.c b/lib/libspl/strtoxx.c
new file mode 100644
index 0000000000..67950686e3
--- /dev/null
+++ b/lib/libspl/strtoxx.c
@@ -0,0 +1,85 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <string.h>
+#include <errno.h>
+#include <sys/sunddi.h>
+
+int
+ddi_strtoul(const char *str, char **endptr, int base,
+	    unsigned long *result)
+{
+	unsigned long val;
+
+	errno = 0;
+	val = strtoul(str, endptr, base);
+	if (errno == 0)
+		*result = val;
+
+	return errno;
+}
+
+int
+ddi_strtol(const char *str, char **endptr, int base,
+	   long *result)
+{
+	long val;
+
+	errno = 0;
+	val = strtol(str, endptr, base);
+	if (errno == 0)
+		*result = val;
+
+	return errno;
+}
+
+int
+ddi_strtoull(const char *str, char **endptr, int base,
+	     unsigned long long *result)
+{
+	unsigned long long val;
+
+	errno = 0;
+	val = strtoull(str, endptr, base);
+	if (errno == 0)
+		*result = val;
+
+	return errno;
+}
+
+int
+ddi_strtoll(const char *str, char **endptr, int base,
+	    long long *result)
+{
+	long long val;
+
+	errno = 0;
+	val = strtoll(str, endptr, base);
+	if (errno == 0)
+		*result = val;
+
+	return errno;
+}