diff --git a/valgrind-3.6.1-x86_64-memcpy-memmove.patch b/valgrind-3.6.1-x86_64-memcpy-memmove.patch
new file mode 100644
index 0000000..39bc1cf
--- /dev/null
+++ b/valgrind-3.6.1-x86_64-memcpy-memmove.patch
@@ -0,0 +1,92 @@
+--- valgrind/memcheck/mc_replace_strmem.c.jj	2011-06-08 17:26:29.000000000 +0200
++++ valgrind/memcheck/mc_replace_strmem.c	2011-06-09 14:49:11.000000000 +0200
+@@ -558,11 +558,7 @@ MEMCHR(VG_Z_DYLD,        memchr)
+ #endif
+ 
+ 
+-#define MEMCPY(soname, fnname) \
+-   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
+-            ( void *dst, const void *src, SizeT len ); \
+-   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
+-            ( void *dst, const void *src, SizeT len ) \
++#define MEMCPY_BODY \
+    { \
+       if (is_overlap(dst, src, len, len)) \
+          RECORD_OVERLAP_ERROR("memcpy", dst, src, len); \
+@@ -628,6 +624,18 @@ MEMCHR(VG_Z_DYLD,        memchr)
+       \
+       return dst; \
+    }
++#define MEMCPY(soname, fnname) \
++   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
++            ( void *dst, const void *src, SizeT len ); \
++   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
++            ( void *dst, const void *src, SizeT len ) \
++   MEMCPY_BODY
++#define MEMCPY_ZZ(soname, fnname) \
++   void* VG_REPLACE_FUNCTION_ZZ(soname,fnname) \
++            ( void *dst, const void *src, SizeT len ); \
++   void* VG_REPLACE_FUNCTION_ZZ(soname,fnname) \
++            ( void *dst, const void *src, SizeT len ) \
++   MEMCPY_BODY
+ 
+ MEMCPY(VG_Z_LIBC_SONAME, memcpy)
+ #if defined(VGO_linux)
+@@ -636,6 +644,11 @@ MEMCPY(VG_Z_LD64_SO_1,   memcpy) /* ld64
+ #elif defined(VGO_darwin)
+ MEMCPY(VG_Z_DYLD,        memcpy)
+ #endif
++#if defined(VGP_amd64_linux)
++/* In glibc 2.14+, memcpy@GLIBC_2.2.5 is an alias to memmove and only
++   memcpy@@GLIBC_2.14 is a real memcpy.  */
++MEMCPY_ZZ(VG_Z_LIBC_SONAME, memcpyZAZAGLIBCZu2Zd14) /* memcpy@@GLIBC_2.14 */
++#endif
+ /* icc9 blats these around all over the place.  Not only in the main
+    executable but various .so's.  They are highly tuned and read
+    memory beyond the source boundary (although work correctly and
+@@ -738,11 +751,7 @@ MEMSET(VG_Z_DYLD,        memset)
+ #endif
+ 
+ 
+-#define MEMMOVE(soname, fnname) \
+-   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
+-            (void *dstV, const void *srcV, SizeT n); \
+-   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
+-            (void *dstV, const void *srcV, SizeT n) \
++#define MEMMOVE_BODY \
+    { \
+       SizeT i; \
+       Char* dst = (Char*)dstV; \
+@@ -758,12 +767,31 @@ MEMSET(VG_Z_DYLD,        memset)
+       } \
+       return dst; \
+    }
++#define MEMMOVE(soname, fnname) \
++   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
++            (void *dstV, const void *srcV, SizeT n); \
++   void* VG_REPLACE_FUNCTION_ZU(soname,fnname) \
++            (void *dstV, const void *srcV, SizeT n) \
++   MEMMOVE_BODY
++#define MEMMOVE_ZZ(soname, fnname) \
++   void* VG_REPLACE_FUNCTION_ZZ(soname,fnname) \
++            (void *dstV, const void *srcV, SizeT n); \
++   void* VG_REPLACE_FUNCTION_ZZ(soname,fnname) \
++            (void *dstV, const void *srcV, SizeT n) \
++   MEMMOVE_BODY
+ 
+ MEMMOVE(VG_Z_LIBC_SONAME, memmove)
+ #if defined(VGO_darwin)
+ MEMMOVE(VG_Z_DYLD,        memmove)
+ #endif
+-
++#if defined(VGP_amd64_linux)
++/* In glibc 2.14+, memcpy@GLIBC_2.2.5 is an alias to memmove and only
++   memcpy@@GLIBC_2.14 is a real memcpy.  It would be nice for
++   memcpy@GLIBC_2.2.5 to differentiate based on whether the caller
++   was calling memmove or memcpy@GLIBC_2.2.5, for now just treat
++   all such calls as memmove.  */
++MEMMOVE_ZZ(VG_Z_LIBC_SONAME, memcpyZAGLIBCZu2Zd2Zd5) /* memcpy@GLIBC_2.2.5 */
++#endif
+ 
+ #define BCOPY(soname, fnname) \
+    void VG_REPLACE_FUNCTION_ZU(soname,fnname) \
diff --git a/valgrind.spec b/valgrind.spec
index d1ef115..8ea3de9 100644
--- a/valgrind.spec
+++ b/valgrind.spec
@@ -1,7 +1,7 @@
 Summary: Tool for finding memory management bugs in programs
 Name: valgrind
 Version: 3.6.1
-Release: 3%{?dist}
+Release: 4%{?dist}
 Epoch: 1
 Source0: http://www.valgrind.org/downloads/valgrind-%{version}.tar.bz2
 Patch1: valgrind-3.6.1-cachegrind-improvements.patch
@@ -24,6 +24,7 @@ Patch17: valgrind-3.6.1-gen_insn_test.patch
 Patch18: valgrind-3.6.1-x86-ldso-strlen.patch
 Patch19: valgrind-3.6.1-ppc64-build.patch
 Patch20: valgrind-3.6.1-tests-_GNU_SOURCE.patch
+Patch21: valgrind-3.6.1-x86_64-memcpy-memmove.patch
 License: GPLv2
 URL: http://www.valgrind.org/
 Group: Development/Debuggers
@@ -118,6 +119,7 @@ for details.
 %patch18 -p1
 %patch19 -p1
 %patch20 -p1
+%patch21 -p1
 
 chmod 755 none/tests/s390x/filter_stderr || :
 
@@ -219,6 +221,9 @@ rm -rf $RPM_BUILD_ROOT
 %endif
 
 %changelog
+* Mon Jun 13 2011 Jakub Jelinek <jakub@redhat.com> 3.6.1-4
+- fix memcpy/memmove redirection on x86_64 (#705790)
+
 * Wed Jun  8 2011 Jakub Jelinek <jakub@redhat.com> 3.6.1-3
 - fix testing against glibc 2.14