diff --git a/libc/arch-arm64/generic/bionic/bcopy.S b/libc/arch-arm64/generic/bionic/bcopy.S
deleted file mode 100644
index 7079e8b..0000000
--- a/libc/arch-arm64/generic/bionic/bcopy.S
+++ /dev/null
@@ -1,30 +0,0 @@
-/* Copyright (c) 2014, Linaro Limited
-   All rights reserved.
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions are met:
-       * Redistributions of source code must retain the above copyright
-         notice, this list of conditions and the following disclaimer.
-       * 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.
-       * Neither the name of the Linaro 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 COPYRIGHT HOLDERS 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 COPYRIGHT
-   HOLDER 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.
-*/
-
-#define BCOPY
-#include "memmove.S"
-#undef BCOPY
diff --git a/libc/arch-arm64/generic/bionic/bzero.S b/libc/arch-arm64/generic/bionic/bzero.S
deleted file mode 100644
index c6175d6..0000000
--- a/libc/arch-arm64/generic/bionic/bzero.S
+++ /dev/null
@@ -1,30 +0,0 @@
-/* Copyright (c) 2014, Linaro Limited
-   All rights reserved.
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions are met:
-       * Redistributions of source code must retain the above copyright
-         notice, this list of conditions and the following disclaimer.
-       * 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.
-       * Neither the name of the Linaro 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 COPYRIGHT HOLDERS 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 COPYRIGHT
-   HOLDER 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.
-*/
-
-#define BZERO
-#include "memset.S"
-#undef BZERO
diff --git a/libc/arch-arm64/generic/generic.mk b/libc/arch-arm64/generic/generic.mk
index 976431a..e10cf66 100644
--- a/libc/arch-arm64/generic/generic.mk
+++ b/libc/arch-arm64/generic/generic.mk
@@ -1,6 +1,4 @@
 libc_bionic_src_files_arm64 += \
-    arch-arm64/generic/bionic/bcopy.S \
-    arch-arm64/generic/bionic/bzero.S \
     arch-arm64/generic/bionic/memcmp.S \
     arch-arm64/generic/bionic/memcpy.S \
     arch-arm64/generic/bionic/memmove.S \
diff --git a/libc/arch-mips64/bionic/bzero.S b/libc/arch-mips64/bionic/bzero.S
deleted file mode 100644
index 76c6bc2..0000000
--- a/libc/arch-mips64/bionic/bzero.S
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
- * COPYRIGHT OWNER 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.
- */
-
-#include <private/bionic_asm.h>
-
-/*
- * void bzero(void *s, size_t n);
- */
-LEAF(bzero,0)
-	SETUP_GP64(t0,bzero)
-	move	a2,a1
-	move	a1,zero
-	LA	t9,memset
-	RESTORE_GP64
-	j	t9
-END(bzero)
diff --git a/libc/arch-mips64/mips64.mk b/libc/arch-mips64/mips64.mk
index 5759104..9a24c61 100644
--- a/libc/arch-mips64/mips64.mk
+++ b/libc/arch-mips64/mips64.mk
@@ -17,7 +17,6 @@
     upstream-freebsd/lib/libc/string/wcsrchr.c \
     upstream-freebsd/lib/libc/string/wmemcmp.c \
     upstream-freebsd/lib/libc/string/wmemmove.c \
-    upstream-openbsd/lib/libc/string/bcopy.c \
     upstream-openbsd/lib/libc/string/stpcpy.c \
     upstream-openbsd/lib/libc/string/stpncpy.c \
     upstream-openbsd/lib/libc/string/strcat.c \
@@ -42,7 +41,6 @@
 ### CPU specific source files
 libc_bionic_src_files_mips64 := \
     arch-mips64/bionic/__bionic_clone.S \
-    arch-mips64/bionic/bzero.S \
     arch-mips64/bionic/_exit_with_stack_teardown.S \
     arch-mips64/bionic/__get_sp.S \
     arch-mips64/bionic/getdents.cpp \
diff --git a/libc/arch-x86_64/string/sse2-bcopy-slm.S b/libc/arch-x86_64/string/sse2-bcopy-slm.S
deleted file mode 100644
index effab0e..0000000
--- a/libc/arch-x86_64/string/sse2-bcopy-slm.S
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
-Copyright (c) 2014, Intel Corporation
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright notice,
-    * this list of conditions and the following disclaimer.
-
-    * 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.
-
-    * Neither the name of Intel Corporation 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
-*/
-
-#define USE_AS_BCOPY
-#define MEMMOVE		bcopy
-#include "sse2-memmove-slm.S"
diff --git a/libc/arch-x86_64/string/sse2-bzero-slm.S b/libc/arch-x86_64/string/sse2-bzero-slm.S
deleted file mode 100644
index 446ea5b..0000000
--- a/libc/arch-x86_64/string/sse2-bzero-slm.S
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
-Copyright (c) 2014, Intel Corporation
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright notice,
-    * this list of conditions and the following disclaimer.
-
-    * 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.
-
-    * Neither the name of Intel Corporation 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
-*/
-
-#define USE_AS_BZERO_P
-#define MEMSET		bzero
-#include "sse2-memset-slm.S"
diff --git a/libc/arch-x86_64/x86_64.mk b/libc/arch-x86_64/x86_64.mk
index c54cdb8..2f0cf2d 100644
--- a/libc/arch-x86_64/x86_64.mk
+++ b/libc/arch-x86_64/x86_64.mk
@@ -42,8 +42,6 @@
     bionic/__memcmp16.cpp \
 
 libc_bionic_src_files_x86_64 += \
-    arch-x86_64/string/sse2-bcopy-slm.S \
-    arch-x86_64/string/sse2-bzero-slm.S \
     arch-x86_64/string/sse2-memcpy-slm.S \
     arch-x86_64/string/sse2-memmove-slm.S \
     arch-x86_64/string/sse2-memset-slm.S \
diff --git a/libc/bionic/memmove.c b/libc/bionic/memmove.c
index a9fc1b5..39c766e 100644
--- a/libc/bionic/memmove.c
+++ b/libc/bionic/memmove.c
@@ -25,22 +25,6 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
-#undef _FORTIFY_SOURCE
-#include <string.h>
-#include <strings.h>
 
-void *memmove(void *dst, const void *src, size_t n)
-{
-  const char *p = src;
-  char *q = dst;
-  /* We can use the optimized memcpy if the source and destination
-   * don't overlap.
-   */
-  if (__builtin_expect(((q < p) && ((size_t)(p - q) >= n))
-                    || ((p < q) && ((size_t)(q - p) >= n)), 1)) {
-    return memcpy(dst, src, n);
-  } else {
-    bcopy(src, dst, n);
-    return dst;
-  }
-}
+#define MEMMOVE
+#include "upstream-openbsd/lib/libc/string/bcopy.c"
diff --git a/libc/include/strings.h b/libc/include/strings.h
index e72798b..8f5fec5 100644
--- a/libc/include/strings.h
+++ b/libc/include/strings.h
@@ -43,20 +43,14 @@
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS
-void	 bcopy(const void *, void *, size_t);
-void	 bzero(void *, size_t);
+#define bcopy(b1, b2, len) (void)(memmove((b2), (b1), (len)))
+#define bzero(b, len) (void)(memset((b), '\0', (len)))
+
 int	 ffs(int);
 char	*index(const char *, int);
 int	 strcasecmp(const char *, const char *);
 int	 strncasecmp(const char *, const char *, size_t);
 
-#if defined(__BIONIC_FORTIFY)
-__BIONIC_FORTIFY_INLINE
-void bzero (void *s, size_t n) {
-    __builtin___memset_chk(s, '\0', n, __builtin_object_size (s, 0));
-}
-#endif /* defined(__BIONIC_FORTIFY) */
-
 __END_DECLS
 
 #endif /* !defined(_STRINGS_H_) */