BSD 4.4 Lite Kernel Sources

35 files changed, 2626 insertions, 0 deletions

diff --git a/sys/libkern/Makefile b/sys/libkern/Makefile
new file mode 100644
index 0000000..991a435
--- /dev/null
+++ b/sys/libkern/Makefile
@@ -0,0 +1,20 @@
+#	@(#)Makefile	7.9 (Berkeley) 6/1/93
+
+LIB=	kern
+CFLAGS+= -I${.CURDIR} -I${.CURDIR}/..
+SRCS=	adddi3.c anddi3.c ashldi3.c ashrdi3.c bcmp.c cmpdi2.c divdi3.c \
+	ffs.c iordi3.c locc.c lshldi3.c lshrdi3.c mcount.c moddi3.c \
+	muldi3.c negdi2.c notdi2.c qdivrem.c random.c rindex.c scanc.c \
+	skpc.c strcat.c strcmp.c strcpy.c strlen.c strncpy.c subdi3.c \
+	ucmpdi2.c udivdi3.c umoddi3.c xordi3.c
+
+.if exists(${.CURDIR}/${MACHINE}/Makefile.inc)
+.PATH: ${.CURDIR}/${MACHINE}
+.include "${.CURDIR}/${MACHINE}/Makefile.inc"
+.endif
+
+# mcount cannot be compiled with profiling
+mcount.po: mcount.o
+	cp mcount.o mcount.po
+
+.include <bsd.lib.mk>
diff --git a/sys/libkern/adddi3.c b/sys/libkern/adddi3.c
new file mode 100644
index 0000000..d10da47
--- /dev/null
+++ b/sys/libkern/adddi3.c
@@ -0,0 +1,60 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)adddi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Add two quads.  This is trivial since a one-bit carry from a single
+ * u_long addition x+y occurs if and only if the sum x+y is less than
+ * either x or y (the choice to compare with x or y is arbitrary).
+ */
+quad_t
+__adddi3(a, b)
+	quad_t a, b;
+{
+	union uu aa, bb, sum;
+
+	aa.q = a;
+	bb.q = b;
+	sum.ul[L] = aa.ul[L] + bb.ul[L];
+	sum.ul[H] = aa.ul[H] + bb.ul[H] + (sum.ul[L] < bb.ul[L]);
+	return (sum.q);
+}
diff --git a/sys/libkern/anddi3.c b/sys/libkern/anddi3.c
new file mode 100644
index 0000000..5ae45ac
--- /dev/null
+++ b/sys/libkern/anddi3.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)anddi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Return a & b, in quad.
+ */
+quad_t
+__anddi3(a, b)
+	quad_t a, b;
+{
+	union uu aa, bb;
+
+	aa.q = a;
+	bb.q = b;
+	aa.ul[0] &= bb.ul[0];
+	aa.ul[1] &= bb.ul[1];
+	return (aa.q);
+}
diff --git a/sys/libkern/ashldi3.c b/sys/libkern/ashldi3.c
new file mode 100644
index 0000000..72501ad
--- /dev/null
+++ b/sys/libkern/ashldi3.c
@@ -0,0 +1,66 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)ashldi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Shift a (signed) quad value left (arithmetic shift left).
+ * This is the same as logical shift left!
+ */
+quad_t
+__ashldi3(a, shift)
+	quad_t a;
+	qshift_t shift;
+{
+	union uu aa;
+
+	aa.q = a;
+	if (shift >= LONG_BITS) {
+		aa.ul[H] = shift >= QUAD_BITS ? 0 :
+		    aa.ul[L] << (shift - LONG_BITS);
+		aa.ul[L] = 0;
+	} else if (shift > 0) {
+		aa.ul[H] = (aa.ul[H] << shift) |
+		    (aa.ul[L] >> (LONG_BITS - shift));
+		aa.ul[L] <<= shift;
+	}
+	return (aa.q);
+}
diff --git a/sys/libkern/ashrdi3.c b/sys/libkern/ashrdi3.c
new file mode 100644
index 0000000..9ffa5ed
--- /dev/null
+++ b/sys/libkern/ashrdi3.c
@@ -0,0 +1,75 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)ashrdi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Shift a (signed) quad value right (arithmetic shift right).
+ */
+quad_t
+__ashrdi3(a, shift)
+	quad_t a;
+	qshift_t shift;
+{
+	union uu aa;
+
+	aa.q = a;
+	if (shift >= LONG_BITS) {
+		long s;
+
+		/*
+		 * Smear bits rightward using the machine's right-shift
+		 * method, whether that is sign extension or zero fill,
+		 * to get the `sign word' s.  Note that shifting by
+		 * LONG_BITS is undefined, so we shift (LONG_BITS-1),
+		 * then 1 more, to get our answer.
+		 */
+		s = (aa.sl[H] >> (LONG_BITS - 1)) >> 1;
+		aa.ul[L] = shift >= QUAD_BITS ? s :
+		    aa.sl[H] >> (shift - LONG_BITS);
+		aa.ul[H] = s;
+	} else if (shift > 0) {
+		aa.ul[L] = (aa.ul[L] >> shift) |
+		    (aa.ul[H] << (LONG_BITS - shift));
+		aa.sl[H] >>= shift;
+	}
+	return (aa.q);
+}
diff --git a/sys/libkern/bcmp.c b/sys/libkern/bcmp.c
new file mode 100644
index 0000000..5a3ae61
--- /dev/null
+++ b/sys/libkern/bcmp.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 1987, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)bcmp.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <string.h>
+
+/*
+ * bcmp -- vax cmpc3 instruction
+ */
+int
+bcmp(b1, b2, length)
+	const void *b1, *b2;
+	register size_t length;
+{
+	register char *p1, *p2;
+
+	if (length == 0)
+		return(0);
+	p1 = (char *)b1;
+	p2 = (char *)b2;
+	do
+		if (*p1++ != *p2++)
+			break;
+	while (--length);
+	return(length);
+}
diff --git a/sys/libkern/cmpdi2.c b/sys/libkern/cmpdi2.c
new file mode 100644
index 0000000..f6e4bdd
--- /dev/null
+++ b/sys/libkern/cmpdi2.c
@@ -0,0 +1,59 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)cmpdi2.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Return 0, 1, or 2 as a <, =, > b respectively.
+ * Both a and b are considered signed---which means only the high word is
+ * signed.
+ */
+int
+__cmpdi2(a, b)
+	quad_t a, b;
+{
+	union uu aa, bb;
+
+	aa.q = a;
+	bb.q = b;
+	return (aa.sl[H] < bb.sl[H] ? 0 : aa.sl[H] > bb.sl[H] ? 2 :
+	    aa.ul[L] < bb.ul[L] ? 0 : aa.ul[L] > bb.ul[L] ? 2 : 1);
+}
diff --git a/sys/libkern/divdi3.c b/sys/libkern/divdi3.c
new file mode 100644
index 0000000..da7b2fc
--- /dev/null
+++ b/sys/libkern/divdi3.c
@@ -0,0 +1,65 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)divdi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Divide two signed quads.
+ * ??? if -1/2 should produce -1 on this machine, this code is wrong
+ */
+quad_t
+__divdi3(a, b)
+	quad_t a, b;
+{
+	u_quad_t ua, ub, uq;
+	int neg;
+
+	if (a < 0)
+		ua = -(u_quad_t)a, neg = 1;
+	else
+		ua = a, neg = 0;
+	if (b < 0)
+		ub = -(u_quad_t)b, neg ^= 1;
+	else
+		ub = b;
+	uq = __qdivrem(ua, ub, (u_quad_t *)0);
+	return (neg ? -uq : uq);
+}
diff --git a/sys/libkern/ffs.c b/sys/libkern/ffs.c
new file mode 100644
index 0000000..099ff8e
--- /dev/null
+++ b/sys/libkern/ffs.c
@@ -0,0 +1,54 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)ffs.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <string.h>
+
+/*
+ * ffs -- vax ffs instruction
+ */
+int
+ffs(mask)
+	register int mask;
+{
+	register int bit;
+
+	if (mask == 0)
+		return(0);
+	for (bit = 1; !(mask & 1); bit++)
+		mask >>= 1;
+	return(bit);
+}
diff --git a/sys/libkern/iordi3.c b/sys/libkern/iordi3.c
new file mode 100644
index 0000000..e225005
--- /dev/null
+++ b/sys/libkern/iordi3.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)iordi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Return a | b, in quad.
+ */
+quad_t
+__iordi3(a, b)
+	quad_t a, b;
+{
+	union uu aa, bb;
+
+	aa.q = a;
+	bb.q = b;
+	aa.ul[0] |= bb.ul[0];
+	aa.ul[1] |= bb.ul[1];
+	return (aa.q);
+}
diff --git a/sys/libkern/libkern.h b/sys/libkern/libkern.h
new file mode 100644
index 0000000..0e465e0
--- /dev/null
+++ b/sys/libkern/libkern.h
@@ -0,0 +1,98 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ *	@(#)libkern.h	8.1 (Berkeley) 6/10/93
+ */
+
+#include <sys/types.h>
+
+static inline int
+imax(a, b)
+	int a, b;
+{
+	return (a > b ? a : b);
+}
+static inline int
+imin(a, b)
+	int a, b;
+{
+	return (a < b ? a : b);
+}
+static inline long
+lmax(a, b)
+	long a, b;
+{
+	return (a > b ? a : b);
+}
+static inline long
+lmin(a, b)
+	long a, b;
+{
+	return (a < b ? a : b);
+}
+static inline u_int
+max(a, b)
+	u_int a, b;
+{
+	return (a > b ? a : b);
+}
+static inline u_int
+min(a, b)
+	u_int a, b;
+{
+	return (a < b ? a : b);
+}
+static inline u_long
+ulmax(a, b)
+	u_long a, b;
+{
+	return (a > b ? a : b);
+}
+static inline u_long
+ulmin(a, b)
+	u_long a, b;
+{
+	return (a < b ? a : b);
+}
+
+/* Prototypes for non-quad routines. */
+int	 bcmp __P((const void *, const void *, size_t));
+int	 ffs __P((int));
+int	 locc __P((int, char *, u_int));
+u_long	 random __P((void));
+char	*rindex __P((const char *, int));
+int	 scanc __P((u_int, u_char *, u_char *, int));
+int	 skpc __P((int, int, char *));
+char	*strcat __P((char *, const char *));
+char	*strcpy __P((char *, const char *));
+size_t	 strlen __P((const char *));
+char	*strncpy __P((char *, const char *, size_t));
diff --git a/sys/libkern/locc.c b/sys/libkern/locc.c
new file mode 100644
index 0000000..3767222
--- /dev/null
+++ b/sys/libkern/locc.c
@@ -0,0 +1,50 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ *	@(#)locc.c	8.1 (Berkeley) 6/10/93
+ */
+
+#include <libkern/libkern.h>
+
+int
+locc(mask0, cp0, size)
+	int mask0;
+	char *cp0;
+	u_int size;
+{
+	register u_char *cp, *end, mask;
+
+	mask = mask0;
+	cp = (u_char *)cp0;
+	for (end = &cp[size]; cp < end && *cp != mask; ++cp);
+	return (end - cp);
+}
diff --git a/sys/libkern/lshldi3.c b/sys/libkern/lshldi3.c
new file mode 100644
index 0000000..0af6051
--- /dev/null
+++ b/sys/libkern/lshldi3.c
@@ -0,0 +1,66 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)lshldi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Shift an (unsigned) quad value left (logical shift left).
+ * This is the same as arithmetic shift left!
+ */
+quad_t
+__lshldi3(a, shift)
+	quad_t a;
+	qshift_t shift;
+{
+	union uu aa;
+
+	aa.q = a;
+	if (shift >= LONG_BITS) {
+		aa.ul[H] = shift >= QUAD_BITS ? 0 :
+		    aa.ul[L] << (shift - LONG_BITS);
+		aa.ul[L] = 0;
+	} else if (shift > 0) {
+		aa.ul[H] = (aa.ul[H] << shift) |
+		    (aa.ul[L] >> (LONG_BITS - shift));
+		aa.ul[L] <<= shift;
+	}
+	return (aa.q);
+}
diff --git a/sys/libkern/lshrdi3.c b/sys/libkern/lshrdi3.c
new file mode 100644
index 0000000..add2eda
--- /dev/null
+++ b/sys/libkern/lshrdi3.c
@@ -0,0 +1,65 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)lshrdi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Shift an (unsigned) quad value right (logical shift right).
+ */
+quad_t
+__lshrdi3(a, shift)
+	quad_t a;
+	qshift_t shift;
+{
+	union uu aa;
+
+	aa.q = a;
+	if (shift >= LONG_BITS) {
+		aa.ul[L] = shift >= QUAD_BITS ? 0 :
+		    aa.ul[H] >> (shift - LONG_BITS);
+		aa.ul[H] = 0;
+	} else if (shift > 0) {
+		aa.ul[L] = (aa.ul[L] >> shift) |
+		    (aa.ul[H] << (LONG_BITS - shift));
+		aa.ul[H] >>= shift;
+	}
+	return (aa.q);
+}
diff --git a/sys/libkern/mcount.c b/sys/libkern/mcount.c
new file mode 100644
index 0000000..523217d
--- /dev/null
+++ b/sys/libkern/mcount.c
@@ -0,0 +1,178 @@
+/*-
+ * Copyright (c) 1983, 1992, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if !defined(lint) && !defined(KERNEL) && defined(LIBC_SCCS)
+static char sccsid[] = "@(#)mcount.c	8.1 (Berkeley) 6/4/93";
+#endif
+
+#include <sys/param.h>
+#include <sys/gmon.h>
+
+/*
+ * mcount is called on entry to each function compiled with the profiling
+ * switch set.  _mcount(), which is declared in a machine-dependent way
+ * with _MCOUNT_DECL, does the actual work and is either inlined into a
+ * C routine or called by an assembly stub.  In any case, this magic is
+ * taken care of by the MCOUNT definition in <machine/profile.h>.
+ *
+ * _mcount updates data structures that represent traversals of the
+ * program's call graph edges.  frompc and selfpc are the return
+ * address and function address that represents the given call graph edge.
+ * 
+ * Note: the original BSD code used the same variable (frompcindex) for
+ * both frompcindex and frompc.  Any reasonable, modern compiler will
+ * perform this optimization.
+ */
+_MCOUNT_DECL(frompc, selfpc)	/* _mcount; may be static, inline, etc */
+	register u_long frompc, selfpc;
+{
+	register u_short *frompcindex;
+	register struct tostruct *top, *prevtop;
+	register struct gmonparam *p;
+	register long toindex;
+#ifdef KERNEL
+	register int s;
+#endif
+
+	p = &_gmonparam;
+	/*
+	 * check that we are profiling
+	 * and that we aren't recursively invoked.
+	 */
+	if (p->state != GMON_PROF_ON)
+		return;
+#ifdef KERNEL
+	MCOUNT_ENTER;
+#else
+	p->state = GMON_PROF_BUSY;
+#endif
+	/*
+	 * check that frompcindex is a reasonable pc value.
+	 * for example:	signal catchers get called from the stack,
+	 *		not from text space.  too bad.
+	 */
+	frompc -= p->lowpc;
+	if (frompc > p->textsize)
+		goto done;
+
+	frompcindex = &p->froms[frompc / (p->hashfraction * sizeof(*p->froms))];
+	toindex = *frompcindex;
+	if (toindex == 0) {
+		/*
+		 *	first time traversing this arc
+		 */
+		toindex = ++p->tos[0].link;
+		if (toindex >= p->tolimit)
+			/* halt further profiling */
+			goto overflow;
+
+		*frompcindex = toindex;
+		top = &p->tos[toindex];
+		top->selfpc = selfpc;
+		top->count = 1;
+		top->link = 0;
+		goto done;
+	}
+	top = &p->tos[toindex];
+	if (top->selfpc == selfpc) {
+		/*
+		 * arc at front of chain; usual case.
+		 */
+		top->count++;
+		goto done;
+	}
+	/*
+	 * have to go looking down chain for it.
+	 * top points to what we are looking at,
+	 * prevtop points to previous top.
+	 * we know it is not at the head of the chain.
+	 */
+	for (; /* goto done */; ) {
+		if (top->link == 0) {
+			/*
+			 * top is end of the chain and none of the chain
+			 * had top->selfpc == selfpc.
+			 * so we allocate a new tostruct
+			 * and link it to the head of the chain.
+			 */
+			toindex = ++p->tos[0].link;
+			if (toindex >= p->tolimit)
+				goto overflow;
+
+			top = &p->tos[toindex];
+			top->selfpc = selfpc;
+			top->count = 1;
+			top->link = *frompcindex;
+			*frompcindex = toindex;
+			goto done;
+		}
+		/*
+		 * otherwise, check the next arc on the chain.
+		 */
+		prevtop = top;
+		top = &p->tos[top->link];
+		if (top->selfpc == selfpc) {
+			/*
+			 * there it is.
+			 * increment its count
+			 * move it to the head of the chain.
+			 */
+			top->count++;
+			toindex = prevtop->link;
+			prevtop->link = top->link;
+			top->link = *frompcindex;
+			*frompcindex = toindex;
+			goto done;
+		}
+		
+	}
+done:
+#ifdef KERNEL
+	MCOUNT_EXIT;
+#else
+	p->state = GMON_PROF_ON;
+#endif
+	return;
+overflow:
+	p->state = GMON_PROF_ERROR;
+#ifdef KERNEL
+	MCOUNT_EXIT;
+#endif
+	return;
+}
+
+/*
+ * Actual definition of mcount function.  Defined in <machine/profile.h>,
+ * which is included by <sys/gmon.h>.
+ */
+MCOUNT
diff --git a/sys/libkern/moddi3.c b/sys/libkern/moddi3.c
new file mode 100644
index 0000000..f31c6e8
--- /dev/null
+++ b/sys/libkern/moddi3.c
@@ -0,0 +1,67 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)moddi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Return remainder after dividing two signed quads.
+ *
+ * XXX
+ * If -1/2 should produce -1 on this machine, this code is wrong.
+ */
+quad_t
+__moddi3(a, b)
+	quad_t a, b;
+{
+	u_quad_t ua, ub, ur;
+	int neg;
+
+	if (a < 0)
+		ua = -(u_quad_t)a, neg = 1;
+	else
+		ua = a, neg = 0;
+	if (b < 0)
+		ub = -(u_quad_t)b, neg ^= 1;
+	else
+		ub = b;
+	(void)__qdivrem(ua, ub, &ur);
+	return (neg ? -ur : ur);
+}
diff --git a/sys/libkern/muldi3.c b/sys/libkern/muldi3.c
new file mode 100644
index 0000000..a8d7cfc
--- /dev/null
+++ b/sys/libkern/muldi3.c
@@ -0,0 +1,246 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)muldi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Multiply two quads.
+ *
+ * Our algorithm is based on the following.  Split incoming quad values
+ * u and v (where u,v >= 0) into
+ *
+ *	u = 2^n u1  *  u0	(n = number of bits in `u_long', usu. 32)
+ *
+ * and 
+ *
+ *	v = 2^n v1  *  v0
+ *
+ * Then
+ *
+ *	uv = 2^2n u1 v1  +  2^n u1 v0  +  2^n v1 u0  +  u0 v0
+ *	   = 2^2n u1 v1  +     2^n (u1 v0 + v1 u0)   +  u0 v0
+ *
+ * Now add 2^n u1 v1 to the first term and subtract it from the middle,
+ * and add 2^n u0 v0 to the last term and subtract it from the middle.
+ * This gives:
+ *
+ *	uv = (2^2n + 2^n) (u1 v1)  +
+ *	         (2^n)    (u1 v0 - u1 v1 + u0 v1 - u0 v0)  +
+ *	       (2^n + 1)  (u0 v0)
+ *
+ * Factoring the middle a bit gives us:
+ *
+ *	uv = (2^2n + 2^n) (u1 v1)  +			[u1v1 = high]
+ *		 (2^n)    (u1 - u0) (v0 - v1)  +	[(u1-u0)... = mid]
+ *	       (2^n + 1)  (u0 v0)			[u0v0 = low]
+ *
+ * The terms (u1 v1), (u1 - u0) (v0 - v1), and (u0 v0) can all be done
+ * in just half the precision of the original.  (Note that either or both
+ * of (u1 - u0) or (v0 - v1) may be negative.)
+ *
+ * This algorithm is from Knuth vol. 2 (2nd ed), section 4.3.3, p. 278.
+ *
+ * Since C does not give us a `long * long = quad' operator, we split
+ * our input quads into two longs, then split the two longs into two
+ * shorts.  We can then calculate `short * short = long' in native
+ * arithmetic.
+ *
+ * Our product should, strictly speaking, be a `long quad', with 128
+ * bits, but we are going to discard the upper 64.  In other words,
+ * we are not interested in uv, but rather in (uv mod 2^2n).  This
+ * makes some of the terms above vanish, and we get:
+ *
+ *	(2^n)(high) + (2^n)(mid) + (2^n + 1)(low)
+ *
+ * or
+ *
+ *	(2^n)(high + mid + low) + low
+ *
+ * Furthermore, `high' and `mid' can be computed mod 2^n, as any factor
+ * of 2^n in either one will also vanish.  Only `low' need be computed
+ * mod 2^2n, and only because of the final term above.
+ */
+static quad_t __lmulq(u_long, u_long);
+
+quad_t
+__muldi3(a, b)
+	quad_t a, b;
+{
+	union uu u, v, low, prod;
+	register u_long high, mid, udiff, vdiff;
+	register int negall, negmid;
+#define	u1	u.ul[H]
+#define	u0	u.ul[L]
+#define	v1	v.ul[H]
+#define	v0	v.ul[L]
+
+	/*
+	 * Get u and v such that u, v >= 0.  When this is finished,
+	 * u1, u0, v1, and v0 will be directly accessible through the
+	 * longword fields.
+	 */
+	if (a >= 0)
+		u.q = a, negall = 0;
+	else
+		u.q = -a, negall = 1;
+	if (b >= 0)
+		v.q = b;
+	else
+		v.q = -b, negall ^= 1;
+
+	if (u1 == 0 && v1 == 0) {
+		/*
+		 * An (I hope) important optimization occurs when u1 and v1
+		 * are both 0.  This should be common since most numbers
+		 * are small.  Here the product is just u0*v0.
+		 */
+		prod.q = __lmulq(u0, v0);
+	} else {
+		/*
+		 * Compute the three intermediate products, remembering
+		 * whether the middle term is negative.  We can discard
+		 * any upper bits in high and mid, so we can use native
+		 * u_long * u_long => u_long arithmetic.
+		 */
+		low.q = __lmulq(u0, v0);
+
+		if (u1 >= u0)
+			negmid = 0, udiff = u1 - u0;
+		else
+			negmid = 1, udiff = u0 - u1;
+		if (v0 >= v1)
+			vdiff = v0 - v1;
+		else
+			vdiff = v1 - v0, negmid ^= 1;
+		mid = udiff * vdiff;
+
+		high = u1 * v1;
+
+		/*
+		 * Assemble the final product.
+		 */
+		prod.ul[H] = high + (negmid ? -mid : mid) + low.ul[L] +
+		    low.ul[H];
+		prod.ul[L] = low.ul[L];
+	}
+	return (negall ? -prod.q : prod.q);
+#undef u1
+#undef u0
+#undef v1
+#undef v0
+}
+
+/*
+ * Multiply two 2N-bit longs to produce a 4N-bit quad, where N is half
+ * the number of bits in a long (whatever that is---the code below
+ * does not care as long as quad.h does its part of the bargain---but
+ * typically N==16).
+ *
+ * We use the same algorithm from Knuth, but this time the modulo refinement
+ * does not apply.  On the other hand, since N is half the size of a long,
+ * we can get away with native multiplication---none of our input terms
+ * exceeds (ULONG_MAX >> 1).
+ *
+ * Note that, for u_long l, the quad-precision result
+ *
+ *	l << N
+ *
+ * splits into high and low longs as HHALF(l) and LHUP(l) respectively.
+ */
+static quad_t
+__lmulq(u_long u, u_long v)
+{
+	u_long u1, u0, v1, v0, udiff, vdiff, high, mid, low;
+	u_long prodh, prodl, was;
+	union uu prod;
+	int neg;
+
+	u1 = HHALF(u);
+	u0 = LHALF(u);
+	v1 = HHALF(v);
+	v0 = LHALF(v);
+
+	low = u0 * v0;
+
+	/* This is the same small-number optimization as before. */
+	if (u1 == 0 && v1 == 0)
+		return (low);
+
+	if (u1 >= u0)
+		udiff = u1 - u0, neg = 0;
+	else
+		udiff = u0 - u1, neg = 1;
+	if (v0 >= v1)
+		vdiff = v0 - v1;
+	else
+		vdiff = v1 - v0, neg ^= 1;
+	mid = udiff * vdiff;
+
+	high = u1 * v1;
+
+	/* prod = (high << 2N) + (high << N); */
+	prodh = high + HHALF(high);
+	prodl = LHUP(high);
+
+	/* if (neg) prod -= mid << N; else prod += mid << N; */
+	if (neg) {
+		was = prodl;
+		prodl -= LHUP(mid);
+		prodh -= HHALF(mid) + (prodl > was);
+	} else {
+		was = prodl;
+		prodl += LHUP(mid);
+		prodh += HHALF(mid) + (prodl < was);
+	}
+
+	/* prod += low << N */
+	was = prodl;
+	prodl += LHUP(low);
+	prodh += HHALF(low) + (prodl < was);
+	/* ... + low; */
+	if ((prodl += low) < low)
+		prodh++;
+
+	/* return 4N-bit product */
+	prod.ul[H] = prodh;
+	prod.ul[L] = prodl;
+	return (prod.q);
+}
diff --git a/sys/libkern/negdi2.c b/sys/libkern/negdi2.c
new file mode 100644
index 0000000..bb8670d
--- /dev/null
+++ b/sys/libkern/negdi2.c
@@ -0,0 +1,57 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)negdi2.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Return -a (or, equivalently, 0 - a), in quad.  See subdi3.c.
+ */
+quad_t
+__negdi2(a)
+	quad_t a;
+{
+	union uu aa, res;
+
+	aa.q = a;
+	res.ul[L] = -aa.ul[L];
+	res.ul[H] = -aa.ul[H] - (res.ul[L] > 0);
+	return (res.q);
+}
diff --git a/sys/libkern/notdi2.c b/sys/libkern/notdi2.c
new file mode 100644
index 0000000..d624733
--- /dev/null
+++ b/sys/libkern/notdi2.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)notdi2.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Return ~a.  For some reason gcc calls this `one's complement' rather
+ * than `not'.
+ */
+quad_t
+__one_cmpldi2(a)
+	quad_t a;
+{
+	union uu aa;
+
+	aa.q = a;
+	aa.ul[0] = ~aa.ul[0];
+	aa.ul[1] = ~aa.ul[1];
+	return (aa.q);
+}
diff --git a/sys/libkern/qdivrem.c b/sys/libkern/qdivrem.c
new file mode 100644
index 0000000..34b94ce
--- /dev/null
+++ b/sys/libkern/qdivrem.c
@@ -0,0 +1,279 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)qdivrem.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Multiprecision divide.  This algorithm is from Knuth vol. 2 (2nd ed),
+ * section 4.3.1, pp. 257--259.
+ */
+
+#include "quad.h"
+
+#define	B	(1 << HALF_BITS)	/* digit base */
+
+/* Combine two `digits' to make a single two-digit number. */
+#define	COMBINE(a, b) (((u_long)(a) << HALF_BITS) | (b))
+
+/* select a type for digits in base B: use unsigned short if they fit */
+#if ULONG_MAX == 0xffffffff && USHRT_MAX >= 0xffff
+typedef unsigned short digit;
+#else
+typedef u_long digit;
+#endif
+
+/*
+ * Shift p[0]..p[len] left `sh' bits, ignoring any bits that
+ * `fall out' the left (there never will be any such anyway).
+ * We may assume len >= 0.  NOTE THAT THIS WRITES len+1 DIGITS.
+ */
+static void
+shl(register digit *p, register int len, register int sh)
+{
+	register int i;
+
+	for (i = 0; i < len; i++)
+		p[i] = LHALF(p[i] << sh) | (p[i + 1] >> (HALF_BITS - sh));
+	p[i] = LHALF(p[i] << sh);
+}
+
+/*
+ * __qdivrem(u, v, rem) returns u/v and, optionally, sets *rem to u%v.
+ *
+ * We do this in base 2-sup-HALF_BITS, so that all intermediate products
+ * fit within u_long.  As a consequence, the maximum length dividend and
+ * divisor are 4 `digits' in this base (they are shorter if they have
+ * leading zeros).
+ */
+u_quad_t
+__qdivrem(uq, vq, arq)
+	u_quad_t uq, vq, *arq;
+{
+	union uu tmp;
+	digit *u, *v, *q;
+	register digit v1, v2;
+	u_long qhat, rhat, t;
+	int m, n, d, j, i;
+	digit uspace[5], vspace[5], qspace[5];
+
+	/*
+	 * Take care of special cases: divide by zero, and u < v.
+	 */
+	if (vq == 0) {
+		/* divide by zero. */
+		static volatile const unsigned int zero = 0;
+
+		tmp.ul[H] = tmp.ul[L] = 1 / zero;
+		if (arq)
+			*arq = uq;
+		return (tmp.q);
+	}
+	if (uq < vq) {
+		if (arq)
+			*arq = uq;
+		return (0);
+	}
+	u = &uspace[0];
+	v = &vspace[0];
+	q = &qspace[0];
+
+	/*
+	 * Break dividend and divisor into digits in base B, then
+	 * count leading zeros to determine m and n.  When done, we
+	 * will have:
+	 *	u = (u[1]u[2]...u[m+n]) sub B
+	 *	v = (v[1]v[2]...v[n]) sub B
+	 *	v[1] != 0
+	 *	1 < n <= 4 (if n = 1, we use a different division algorithm)
+	 *	m >= 0 (otherwise u < v, which we already checked)
+	 *	m + n = 4
+	 * and thus
+	 *	m = 4 - n <= 2
+	 */
+	tmp.uq = uq;
+	u[0] = 0;
+	u[1] = HHALF(tmp.ul[H]);
+	u[2] = LHALF(tmp.ul[H]);
+	u[3] = HHALF(tmp.ul[L]);
+	u[4] = LHALF(tmp.ul[L]);
+	tmp.uq = vq;
+	v[1] = HHALF(tmp.ul[H]);
+	v[2] = LHALF(tmp.ul[H]);
+	v[3] = HHALF(tmp.ul[L]);
+	v[4] = LHALF(tmp.ul[L]);
+	for (n = 4; v[1] == 0; v++) {
+		if (--n == 1) {
+			u_long rbj;	/* r*B+u[j] (not root boy jim) */
+			digit q1, q2, q3, q4;
+
+			/*
+			 * Change of plan, per exercise 16.
+			 *	r = 0;
+			 *	for j = 1..4:
+			 *		q[j] = floor((r*B + u[j]) / v),
+			 *		r = (r*B + u[j]) % v;
+			 * We unroll this completely here.
+			 */
+			t = v[2];	/* nonzero, by definition */
+			q1 = u[1] / t;
+			rbj = COMBINE(u[1] % t, u[2]);
+			q2 = rbj / t;
+			rbj = COMBINE(rbj % t, u[3]);
+			q3 = rbj / t;
+			rbj = COMBINE(rbj % t, u[4]);
+			q4 = rbj / t;
+			if (arq)
+				*arq = rbj % t;
+			tmp.ul[H] = COMBINE(q1, q2);
+			tmp.ul[L] = COMBINE(q3, q4);
+			return (tmp.q);
+		}
+	}
+
+	/*
+	 * By adjusting q once we determine m, we can guarantee that
+	 * there is a complete four-digit quotient at &qspace[1] when
+	 * we finally stop.
+	 */
+	for (m = 4 - n; u[1] == 0; u++)
+		m--;
+	for (i = 4 - m; --i >= 0;)
+		q[i] = 0;
+	q += 4 - m;
+
+	/*
+	 * Here we run Program D, translated from MIX to C and acquiring
+	 * a few minor changes.
+	 *
+	 * D1: choose multiplier 1 << d to ensure v[1] >= B/2.
+	 */
+	d = 0;
+	for (t = v[1]; t < B / 2; t <<= 1)
+		d++;
+	if (d > 0) {
+		shl(&u[0], m + n, d);		/* u <<= d */
+		shl(&v[1], n - 1, d);		/* v <<= d */
+	}
+	/*
+	 * D2: j = 0.
+	 */
+	j = 0;
+	v1 = v[1];	/* for D3 -- note that v[1..n] are constant */
+	v2 = v[2];	/* for D3 */
+	do {
+		register digit uj0, uj1, uj2;
+		
+		/*
+		 * D3: Calculate qhat (\^q, in TeX notation).
+		 * Let qhat = min((u[j]*B + u[j+1])/v[1], B-1), and
+		 * let rhat = (u[j]*B + u[j+1]) mod v[1].
+		 * While rhat < B and v[2]*qhat > rhat*B+u[j+2],
+		 * decrement qhat and increase rhat correspondingly.
+		 * Note that if rhat >= B, v[2]*qhat < rhat*B.
+		 */
+		uj0 = u[j + 0];	/* for D3 only -- note that u[j+...] change */
+		uj1 = u[j + 1];	/* for D3 only */
+		uj2 = u[j + 2];	/* for D3 only */
+		if (uj0 == v1) {
+			qhat = B;
+			rhat = uj1;
+			goto qhat_too_big;
+		} else {
+			u_long n = COMBINE(uj0, uj1);
+			qhat = n / v1;
+			rhat = n % v1;
+		}
+		while (v2 * qhat > COMBINE(rhat, uj2)) {
+	qhat_too_big:
+			qhat--;
+			if ((rhat += v1) >= B)
+				break;
+		}
+		/*
+		 * D4: Multiply and subtract.
+		 * The variable `t' holds any borrows across the loop.
+		 * We split this up so that we do not require v[0] = 0,
+		 * and to eliminate a final special case.
+		 */
+		for (t = 0, i = n; i > 0; i--) {
+			t = u[i + j] - v[i] * qhat - t;
+			u[i + j] = LHALF(t);
+			t = (B - HHALF(t)) & (B - 1);
+		}
+		t = u[j] - t;
+		u[j] = LHALF(t);
+		/*
+		 * D5: test remainder.
+		 * There is a borrow if and only if HHALF(t) is nonzero;
+		 * in that (rare) case, qhat was too large (by exactly 1).
+		 * Fix it by adding v[1..n] to u[j..j+n].
+		 */
+		if (HHALF(t)) {
+			qhat--;
+			for (t = 0, i = n; i > 0; i--) { /* D6: add back. */
+				t += u[i + j] + v[i];
+				u[i + j] = LHALF(t);
+				t = HHALF(t);
+			}
+			u[j] = LHALF(u[j] + t);
+		}
+		q[j] = qhat;
+	} while (++j <= m);		/* D7: loop on j. */
+
+	/*
+	 * If caller wants the remainder, we have to calculate it as
+	 * u[m..m+n] >> d (this is at most n digits and thus fits in
+	 * u[m+1..m+n], but we may need more source digits).
+	 */
+	if (arq) {
+		if (d) {
+			for (i = m + n; i > m; --i)
+				u[i] = (u[i] >> d) |
+				    LHALF(u[i - 1] << (HALF_BITS - d));
+			u[i] = 0;
+		}
+		tmp.ul[H] = COMBINE(uspace[1], uspace[2]);
+		tmp.ul[L] = COMBINE(uspace[3], uspace[4]);
+		*arq = tmp.q;
+	}
+
+	tmp.ul[H] = COMBINE(qspace[1], qspace[2]);
+	tmp.ul[L] = COMBINE(qspace[3], qspace[4]);
+	return (tmp.q);
+}
diff --git a/sys/libkern/quad.h b/sys/libkern/quad.h
new file mode 100644
index 0000000..bc6a2f8
--- /dev/null
+++ b/sys/libkern/quad.h
@@ -0,0 +1,110 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ *	@(#)quad.h	8.1 (Berkeley) 6/4/93
+ */
+
+/*
+ * Quad arithmetic.
+ *
+ * This library makes the following assumptions:
+ *
+ *  - The type long long (aka quad_t) exists.
+ *
+ *  - A quad variable is exactly twice as long as `long'.
+ *
+ *  - The machine's arithmetic is two's complement.
+ *
+ * This library can provide 128-bit arithmetic on a machine with 128-bit
+ * quads and 64-bit longs, for instance, or 96-bit arithmetic on machines
+ * with 48-bit longs.
+ */
+
+#include <sys/types.h>
+#include <limits.h>
+
+/*
+ * Depending on the desired operation, we view a `long long' (aka quad_t) in
+ * one or more of the following formats.
+ */
+union uu {
+	quad_t	q;		/* as a (signed) quad */
+	quad_t	uq;		/* as an unsigned quad */
+	long	sl[2];		/* as two signed longs */
+	u_long	ul[2];		/* as two unsigned longs */
+};
+
+/*
+ * Define high and low longwords.
+ */
+#define	H		_QUAD_HIGHWORD
+#define	L		_QUAD_LOWWORD
+
+/*
+ * Total number of bits in a quad_t and in the pieces that make it up.
+ * These are used for shifting, and also below for halfword extraction
+ * and assembly.
+ */
+#define	QUAD_BITS	(sizeof(quad_t) * CHAR_BIT)
+#define	LONG_BITS	(sizeof(long) * CHAR_BIT)
+#define	HALF_BITS	(sizeof(long) * CHAR_BIT / 2)
+
+/*
+ * Extract high and low shortwords from longword, and move low shortword of
+ * longword to upper half of long, i.e., produce the upper longword of
+ * ((quad_t)(x) << (number_of_bits_in_long/2)).  (`x' must actually be u_long.)
+ *
+ * These are used in the multiply code, to split a longword into upper
+ * and lower halves, and to reassemble a product as a quad_t, shifted left
+ * (sizeof(long)*CHAR_BIT/2).
+ */
+#define	HHALF(x)	((x) >> HALF_BITS)
+#define	LHALF(x)	((x) & ((1 << HALF_BITS) - 1))
+#define	LHUP(x)		((x) << HALF_BITS)
+
+extern u_quad_t __qdivrem __P((u_quad_t u, u_quad_t v, u_quad_t *rem));
+
+/*
+ * XXX
+ * Compensate for gcc 1 vs gcc 2.  Gcc 1 defines ?sh?di3's second argument
+ * as u_quad_t, while gcc 2 correctly uses int.  Unfortunately, we still use
+ * both compilers.
+ */
+#if __GNUC__ >= 2
+typedef unsigned int	qshift_t;
+#else
+typedef u_quad_t	qshift_t;
+#endif
diff --git a/sys/libkern/random.c b/sys/libkern/random.c
new file mode 100644
index 0000000..5153124
--- /dev/null
+++ b/sys/libkern/random.c
@@ -0,0 +1,63 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ *	@(#)random.c	8.1 (Berkeley) 6/10/93
+ */
+
+#include <libkern/libkern.h>
+
+/*
+ * Pseudo-random number generator for randomizing the profiling clock,
+ * and whatever else we might use it for.  The result is uniform on
+ * [0, 2^31 - 1].
+ */
+u_long
+random()
+{
+	static u_long randseed = 1;
+	register long x, hi, lo, t;
+
+	/*
+	 * Compute x[n + 1] = (7^5 * x[n]) mod (2^31 - 1).
+	 * From "Random number generators: good ones are hard to find",
+	 * Park and Miller, Communications of the ACM, vol. 31, no. 10,
+	 * October 1988, p. 1195.
+	 */
+	x = randseed;
+	hi = x / 127773;
+	lo = x % 127773;
+	t = 16807 * lo - 2836 * hi;
+	if (t <= 0)
+		t += 0x7fffffff;
+	randseed = t;
+	return (t);
+}
diff --git a/sys/libkern/rindex.c b/sys/libkern/rindex.c
new file mode 100644
index 0000000..69dced4
--- /dev/null
+++ b/sys/libkern/rindex.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)rindex.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <stddef.h>
+#include <string.h>
+
+char *
+#ifdef STRRCHR
+strrchr(p, ch)
+#else
+rindex(p, ch)
+#endif
+	register const char *p;
+	register int ch;
+{
+	register char *save;
+
+	for (save = NULL;; ++p) {
+		if (*p == ch)
+			save = (char *)p;
+		if (!*p)
+			return(save);
+	}
+	/* NOTREACHED */
+}
diff --git a/sys/libkern/scanc.c b/sys/libkern/scanc.c
new file mode 100644
index 0000000..2d8b6a0
--- /dev/null
+++ b/sys/libkern/scanc.c
@@ -0,0 +1,50 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ *	@(#)scanc.c	8.1 (Berkeley) 6/10/93
+ */
+
+#include <libkern/libkern.h>
+
+int
+scanc(size, cp, table, mask0)
+	u_int size;
+	register u_char *cp, table[];
+	int mask0;
+{
+	register u_char *end;
+	register u_char mask;
+
+	mask = mask0;
+	for (end = &cp[size]; cp < end && (table[*cp] & mask) == 0; ++cp);
+	return (end - cp);
+}
diff --git a/sys/libkern/skpc.c b/sys/libkern/skpc.c
new file mode 100644
index 0000000..11b269e
--- /dev/null
+++ b/sys/libkern/skpc.c
@@ -0,0 +1,50 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ *	@(#)skpc.c	8.1 (Berkeley) 6/10/93
+ */
+
+#include <libkern/libkern.h>
+
+int
+skpc(mask0, size, cp0)
+	int mask0;
+	int size;
+	char *cp0;
+{
+	register u_char *cp, *end, mask;
+
+	mask = mask0;
+	cp = (u_char *)cp0;
+	for (end = &cp[size]; cp < end && *cp == mask; ++cp);
+	return (end - cp);
+}
diff --git a/sys/libkern/strcat.c b/sys/libkern/strcat.c
new file mode 100644
index 0000000..3436967
--- /dev/null
+++ b/sys/libkern/strcat.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strcat.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <string.h>
+
+char *
+strcat(s, append)
+	register char *s;
+	register const char *append;
+{
+	char *save = s;
+
+	for (; *s; ++s);
+	while (*s++ = *append++);
+	return(save);
+}
diff --git a/sys/libkern/strcmp.c b/sys/libkern/strcmp.c
new file mode 100644
index 0000000..79cfaa8
--- /dev/null
+++ b/sys/libkern/strcmp.c
@@ -0,0 +1,55 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strcmp.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/cdefs.h>
+#include <string.h>
+
+/*
+ * Compare strings.
+ */
+int
+strcmp(s1, s2)
+	register const char *s1, *s2;
+{
+	while (*s1 == *s2++)
+		if (*s1++ == 0)
+			return (0);
+	return (*(unsigned char *)s1 - *(unsigned char *)--s2);
+}
diff --git a/sys/libkern/strcpy.c b/sys/libkern/strcpy.c
new file mode 100644
index 0000000..d1791dd
--- /dev/null
+++ b/sys/libkern/strcpy.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strcpy.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/cdefs.h>
+#include <string.h>
+
+char *
+strcpy(to, from)
+	register char *to;
+	register const char *from;
+{
+	char *save = to;
+
+	for (; *to = *from; ++from, ++to);
+	return(save);
+}
diff --git a/sys/libkern/strlen.c b/sys/libkern/strlen.c
new file mode 100644
index 0000000..323fbe4
--- /dev/null
+++ b/sys/libkern/strlen.c
@@ -0,0 +1,50 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strlen.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/cdefs.h>
+#include <string.h>
+
+size_t
+strlen(str)
+	const char *str;
+{
+	register const char *s;
+
+	for (s = str; *s; ++s);
+	return(s - str);
+}
+
diff --git a/sys/libkern/strncpy.c b/sys/libkern/strncpy.c
new file mode 100644
index 0000000..9e72740
--- /dev/null
+++ b/sys/libkern/strncpy.c
@@ -0,0 +1,68 @@
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)strncpy.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/cdefs.h>
+#include <string.h>
+
+/*
+ * Copy src to dst, truncating or null-padding to always copy n bytes.
+ * Return dst.
+ */
+char *
+strncpy(dst, src, n)
+	char *dst;
+	const char *src;
+	register size_t n;
+{
+	if (n != 0) {
+		register char *d = dst;
+		register const char *s = src;
+
+		do {
+			if ((*d++ = *s++) == 0) {
+				/* NUL pad the remaining n-1 bytes */
+				while (--n != 0)
+					*d++ = 0;
+				break;
+			}
+		} while (--n != 0);
+	}
+	return (dst);
+}
diff --git a/sys/libkern/subdi3.c b/sys/libkern/subdi3.c
new file mode 100644
index 0000000..e976345
--- /dev/null
+++ b/sys/libkern/subdi3.c
@@ -0,0 +1,59 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)subdi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Subtract two quad values.  This is trivial since a one-bit carry
+ * from a single u_long difference x-y occurs if and only if (x-y) > x.
+ */
+quad_t
+__subdi3(a, b)
+	quad_t a, b;
+{
+	union uu aa, bb, diff;
+
+	aa.q = a;
+	bb.q = b;
+	diff.ul[L] = aa.ul[L] - bb.ul[L];
+	diff.ul[H] = aa.ul[H] - bb.ul[H] - (diff.ul[L] > aa.ul[L]);
+	return (diff.q);
+}
diff --git a/sys/libkern/ucmpdi2.c b/sys/libkern/ucmpdi2.c
new file mode 100644
index 0000000..e5dfc43
--- /dev/null
+++ b/sys/libkern/ucmpdi2.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)ucmpdi2.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Return 0, 1, or 2 as a <, =, > b respectively.
+ * Neither a nor b are considered signed.
+ */
+int
+__ucmpdi2(a, b)
+	u_quad_t a, b;
+{
+	union uu aa, bb;
+
+	aa.uq = a;
+	bb.uq = b;
+	return (aa.ul[H] < bb.ul[H] ? 0 : aa.ul[H] > bb.ul[H] ? 2 :
+	    aa.ul[L] < bb.ul[L] ? 0 : aa.ul[L] > bb.ul[L] ? 2 : 1);
+}
diff --git a/sys/libkern/udivdi3.c b/sys/libkern/udivdi3.c
new file mode 100644
index 0000000..8ddd559
--- /dev/null
+++ b/sys/libkern/udivdi3.c
@@ -0,0 +1,53 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)udivdi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Divide two unsigned quads.
+ */
+u_quad_t
+__udivdi3(a, b)
+	u_quad_t a, b;
+{
+
+	return (__qdivrem(a, b, (u_quad_t *)0));
+}
diff --git a/sys/libkern/umoddi3.c b/sys/libkern/umoddi3.c
new file mode 100644
index 0000000..2a85f76
--- /dev/null
+++ b/sys/libkern/umoddi3.c
@@ -0,0 +1,55 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)umoddi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Return remainder after dividing two unsigned quads.
+ */
+u_quad_t
+__umoddi3(a, b)
+	u_quad_t a, b;
+{
+	u_quad_t r;
+
+	(void)__qdivrem(a, b, &r);
+	return (r);
+}
diff --git a/sys/libkern/xordi3.c b/sys/libkern/xordi3.c
new file mode 100644
index 0000000..e3a8588
--- /dev/null
+++ b/sys/libkern/xordi3.c
@@ -0,0 +1,58 @@
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)xordi3.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+
+#include "quad.h"
+
+/*
+ * Return a ^ b, in quad.
+ */
+quad_t
+__xordi3(a, b)
+	quad_t a, b;
+{
+	union uu aa, bb;
+
+	aa.q = a;
+	bb.q = b;
+	aa.ul[0] ^= bb.ul[0];
+	aa.ul[1] ^= bb.ul[1];
+	return (aa.q);
+}