diff --git a/libc/Android.mk b/libc/Android.mk
index bcf546f..ff21d6a 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -673,6 +673,7 @@
     $(libc_common_cflags) \
     -I$(LOCAL_PATH)/upstream-openbsd/android/include \
     -I$(LOCAL_PATH)/upstream-openbsd/lib/libc/include \
+    -I$(LOCAL_PATH)/upstream-openbsd/lib/libc/gdtoa/ \
     -include openbsd-compat.h
 LOCAL_CONLYFLAGS := $(libc_common_conlyflags)
 LOCAL_CPPFLAGS := $(libc_common_cppflags)
diff --git a/libc/upstream-openbsd/lib/libc/stdio/fgetln.c b/libc/upstream-openbsd/lib/libc/stdio/fgetln.c
index 539b3c0..d0c0809 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/fgetln.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/fgetln.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fgetln.c,v 1.11 2009/11/21 09:53:44 guenther Exp $ */
+/*	$OpenBSD: fgetln.c,v 1.12 2013/11/12 07:04:06 deraadt Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -43,7 +43,7 @@
  * so we add 1 here.
 #endif
  */
-int
+static int
 __slbexpand(FILE *fp, size_t newsize)
 {
 	void *p;
diff --git a/libc/upstream-openbsd/lib/libc/stdio/fputws.c b/libc/upstream-openbsd/lib/libc/stdio/fputws.c
index c4c2d8e..108846e 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/fputws.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/fputws.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fputws.c,v 1.6 2013/04/17 17:40:35 tedu Exp $	*/
+/*	$OpenBSD: fputws.c,v 1.7 2013/11/12 07:04:35 deraadt Exp $	*/
 /* $NetBSD: fputws.c,v 1.1 2003/03/07 07:11:37 tshiozak Exp $ */
 
 /*-
@@ -34,8 +34,7 @@
 #include <stdio.h>
 #include <wchar.h>
 #include "local.h"
-
-wint_t __fputwc_unlock(wchar_t wc, FILE *fp);
+#include "fvwrite.h"
 
 int
 fputws(ws, fp)
diff --git a/libc/upstream-openbsd/lib/libc/stdio/fread.c b/libc/upstream-openbsd/lib/libc/stdio/fread.c
index 430865d..8a592f6 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/fread.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/fread.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fread.c,v 1.11 2009/11/21 09:53:44 guenther Exp $ */
+/*	$OpenBSD: fread.c,v 1.12 2014/05/01 16:40:36 deraadt Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -33,8 +33,12 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <stdint.h>
+#include <errno.h>
 #include "local.h"
 
+#define MUL_NO_OVERFLOW	(1UL << (sizeof(size_t) * 4))
+
 size_t
 fread(void *buf, size_t size, size_t count, FILE *fp)
 {
@@ -44,6 +48,16 @@
 	size_t total;
 
 	/*
+	 * Extension:  Catch integer overflow
+	 */
+	if ((size >= MUL_NO_OVERFLOW || count >= MUL_NO_OVERFLOW) &&
+	    size > 0 && SIZE_MAX / size < count) {
+		errno = EOVERFLOW;
+		fp->_flags |= __SERR;
+		return (0);
+	}
+
+	/*
 	 * ANSI and SUSv2 require a return value of 0 if size or count are 0.
 	 */
 	if ((resid = count * size) == 0)
diff --git a/libc/upstream-openbsd/lib/libc/stdio/vfprintf.c b/libc/upstream-openbsd/lib/libc/stdio/vfprintf.c
index b4f8f29..86b540e 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/vfprintf.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/vfprintf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vfprintf.c,v 1.63 2013/03/02 19:40:08 guenther Exp $	*/
+/*	$OpenBSD: vfprintf.c,v 1.65 2014/03/19 05:17:01 guenther Exp $	*/
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -216,11 +216,10 @@
 #include <locale.h>
 #include <math.h>
 #include "floatio.h"
+#include "gdtoa.h"
 
 #define	DEFPREC		6
 
-extern char *__dtoa(double, int, int, int *, int *, char **);
-extern void  __freedtoa(char *);
 static int exponent(char *, int, int);
 #endif /* FLOATING_POINT */
 
@@ -399,7 +398,7 @@
 	    flags&PTRINT ? GETARG(ptrdiff_t) : \
 	    flags&SIZEINT ? GETARG(ssize_t) : \
 	    flags&SHORTINT ? (short)GETARG(int) : \
-	    flags&CHARINT ? (__signed char)GETARG(int) : \
+	    flags&CHARINT ? (signed char)GETARG(int) : \
 	    GETARG(int)))
 #define	UARG() \
 	((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \
@@ -810,7 +809,7 @@
 			else if (flags & SHORTINT)
 				*GETARG(short *) = ret;
 			else if (flags & CHARINT)
-				*GETARG(__signed char *) = ret;
+				*GETARG(signed char *) = ret;
 			else if (flags & PTRINT)
 				*GETARG(ptrdiff_t *) = ret;
 			else if (flags & SIZEINT)
diff --git a/libc/upstream-openbsd/lib/libc/stdio/vfscanf.c b/libc/upstream-openbsd/lib/libc/stdio/vfscanf.c
index c2996a9..abefe32 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/vfscanf.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/vfscanf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vfscanf.c,v 1.30 2013/04/17 17:40:35 tedu Exp $ */
+/*	$OpenBSD: vfscanf.c,v 1.31 2014/03/19 05:17:01 guenther Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -273,7 +273,7 @@
 			if (flags & SUPPRESS)
 				continue;
 			if (flags & SHORTSHORT)
-				*va_arg(ap, __signed char *) = nread;
+				*va_arg(ap, signed char *) = nread;
 			else if (flags & SHORT)
 				*va_arg(ap, short *) = nread;
 			else if (flags & LONG)
@@ -749,7 +749,7 @@
 				else if (flags & SHORT)
 					*va_arg(ap, short *) = res;
 				else if (flags & SHORTSHORT)
-					*va_arg(ap, __signed char *) = res;
+					*va_arg(ap, signed char *) = res;
 				else
 					*va_arg(ap, int *) = res;
 				nassigned++;
diff --git a/libc/upstream-openbsd/lib/libc/stdio/vfwprintf.c b/libc/upstream-openbsd/lib/libc/stdio/vfwprintf.c
index f76eed3..7cb08ea 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/vfwprintf.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/vfwprintf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vfwprintf.c,v 1.6 2013/04/17 17:40:35 tedu Exp $ */
+/*	$OpenBSD: vfwprintf.c,v 1.9 2014/03/19 05:17:01 guenther Exp $ */
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -54,8 +54,6 @@
 #include "local.h"
 #include "fvwrite.h"
 
-wint_t __fputwc_unlock(wchar_t wc, FILE *fp);
-
 union arg {
 	int			intarg;
 	unsigned int		uintarg;
@@ -235,11 +233,10 @@
 #include <locale.h>
 #include <math.h>
 #include "floatio.h"
+#include "gdtoa.h"
 
 #define	DEFPREC		6
 
-extern char *__dtoa(double, int, int, int *, int *, char **);
-extern void  __freedtoa(char *);
 static int exponent(wchar_t *, int, int);
 #endif /* FLOATING_POINT */
 
@@ -392,7 +389,7 @@
 	    flags&PTRINT ? GETARG(ptrdiff_t) : \
 	    flags&SIZEINT ? GETARG(ssize_t) : \
 	    flags&SHORTINT ? (short)GETARG(int) : \
-	    flags&CHARINT ? (__signed char)GETARG(int) : \
+	    flags&CHARINT ? (signed char)GETARG(int) : \
 	    GETARG(int)))
 #define	UARG() \
 	((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \
@@ -795,7 +792,7 @@
 			else if (flags & SHORTINT)
 				*GETARG(short *) = ret;
 			else if (flags & CHARINT)
-				*GETARG(__signed char *) = ret;
+				*GETARG(signed char *) = ret;
 			else if (flags & PTRINT)
 				*GETARG(ptrdiff_t *) = ret;
 			else if (flags & SIZEINT)
diff --git a/libc/upstream-openbsd/lib/libc/stdio/vfwscanf.c b/libc/upstream-openbsd/lib/libc/stdio/vfwscanf.c
index e5cf5e1..cbb36be 100644
--- a/libc/upstream-openbsd/lib/libc/stdio/vfwscanf.c
+++ b/libc/upstream-openbsd/lib/libc/stdio/vfwscanf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vfwscanf.c,v 1.2 2012/01/18 17:23:11 chl Exp $ */
+/*	$OpenBSD: vfwscanf.c,v 1.4 2014/03/19 05:17:01 guenther Exp $ */
 /*-
  * Copyright (c) 1990, 1993
  *	The Regents of the University of California.  All rights reserved.
@@ -31,7 +31,6 @@
  * SUCH DAMAGE.
  */
 
-#include <ctype.h>
 #include <inttypes.h>
 #include <limits.h>
 #include <locale.h>
@@ -300,7 +299,7 @@
 			if (flags & SUPPRESS)
 				continue;
 			if (flags & SHORTSHORT)
-				*va_arg(ap, __signed char *) = nread;
+				*va_arg(ap, signed char *) = nread;
 			else if (flags & SHORT)
 				*va_arg(ap, short *) = nread;
 			else if (flags & LONG)
@@ -324,7 +323,7 @@
 			return (EOF);
 
 		default:	/* compat */
-			if (isupper(c))
+			if (iswupper(c))
 				flags |= LONG;
 			c = CT_INT;
 			base = 10;
@@ -672,7 +671,7 @@
 				else if (flags & SHORT)
 					*va_arg(ap, short *) = res;
 				else if (flags & SHORTSHORT)
-					*va_arg(ap, __signed char *) = res;
+					*va_arg(ap, signed char *) = res;
 				else
 					*va_arg(ap, int *) = res;
 				nassigned++;