--- glibc-2.13/sysdeps/x86_64/multiarch/memcpy-ssse3.S	2011-01-18 06:34:07.000000000 +0200
+++ glibc-2.13/sysdeps/x86_64/multiarch/memcpy-ssse3.S	2011-03-29 20:06:11.449090136 +0300
@@ -84,6 +84,17 @@ L(copy_forward):
 	ALIGN (4)
 L(80bytesormore):
 #ifndef USE_AS_MEMMOVE
+	lea	(%rsi,%rdx),%r9
+	lea	(%rdi,%rdx),%r11
+	cmp	%rdi,%r9		/* dest start >= source end */
+	jae	L(nonoverlap)		/*  -> nonoverlapping */
+	cmp	%rsi,%r11		/* source start >= destination end */
+	jae	L(nonoverlap)		/*  -> nonoverlapping */
+	movb	$0, 0
+	L(nonoverlap):
+#endif
+
+#ifndef USE_AS_MEMMOVE
 	cmp	%dil, %sil
 	jle	L(copy_backward)
 #endif
--- glibc-2.13/sysdeps/x86_64/multiarch/memcpy-ssse3-back.S	2011-01-18 06:34:07.000000000 +0200
+++ glibc-2.13/sysdeps/x86_64/multiarch/memcpy-ssse3-back.S	2011-03-29 20:06:21.252112024 +0300
@@ -90,6 +90,16 @@ L(bk_write):
 
 	ALIGN (4)
 L(144bytesormore):
+#ifndef USE_AS_MEMMOVE
+	lea	(%rsi,%rdx),%r9
+	lea	(%rdi,%rdx),%r11
+	cmp	%rdi,%r9		/* dest start >= source end */
+	jae	L(nonoverlap)		/*  -> nonoverlapping */
+	cmp	%rsi,%r11		/* source start >= destination end */
+	jae	L(nonoverlap)		/*  -> nonoverlapping */
+	movb	$0, 0
+	L(nonoverlap):
+#endif
 
 #ifndef USE_AS_MEMMOVE
 	cmp	%dil, %sil