diff --git a/libc/arch-riscv64/string/bcopy.c b/libc/arch-riscv64/string/bcopy.c
new file mode 100644
index 0000000..57adcf6
--- /dev/null
+++ b/libc/arch-riscv64/string/bcopy.c
@@ -0,0 +1,122 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * 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. 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.
+ */
+
+#include <sys/types.h>
+
+typedef	intptr_t word;		/* "word" used for optimal copy speed */
+
+#define	wsize	sizeof(word)
+#define	wmask	(wsize - 1)
+
+/*
+ * Copy a block of memory, handling overlap.
+ */
+#include <string.h>
+
+void *
+#ifdef MEMCOPY
+memcpy_gc
+#else
+memmove_gc
+#endif
+(void *dst0, const void *src0, size_t length)
+{
+	char *dst = dst0;
+	const char *src = src0;
+	size_t t;
+
+	if (length == 0 || dst == src)		/* nothing to do */
+		goto done;
+
+	/*
+	 * Macros: loop-t-times; and loop-t-times, t>0
+	 */
+#define	TLOOP(s) if (t) TLOOP1(s)
+#define	TLOOP1(s) do { s; } while (--t)
+
+	if ((unsigned long)dst < (unsigned long)src) {
+		/*
+		 * Copy forward.
+		 */
+		t = (uintptr_t)src;	/* only need low bits */
+		if ((t | (uintptr_t)dst) & wmask) {
+			/*
+			 * Try to align operands.  This cannot be done
+			 * unless the low bits match.
+			 */
+			if ((t ^ (uintptr_t)dst) & wmask || length < wsize)
+				t = length;
+			else
+				t = wsize - (t & wmask);
+			length -= t;
+			TLOOP1(*dst++ = *src++);
+		}
+		/*
+		 * Copy whole words, then mop up any trailing bytes.
+		 */
+		t = length / wsize;
+		TLOOP(*(word *)(void *)dst = *(const word *)(const void *)src;
+		    src += wsize; dst += wsize);
+		t = length & wmask;
+		TLOOP(*dst++ = *src++);
+	} else {
+		/*
+		 * Copy backwards.  Otherwise essentially the same.
+		 * Alignment works as before, except that it takes
+		 * (t&wmask) bytes to align, not wsize-(t&wmask).
+		 */
+		src += length;
+		dst += length;
+		t = (uintptr_t)src;
+		if ((t | (uintptr_t)dst) & wmask) {
+			if ((t ^ (uintptr_t)dst) & wmask || length <= wsize)
+				t = length;
+			else
+				t &= wmask;
+			length -= t;
+			TLOOP1(*--dst = *--src);
+		}
+		t = length / wsize;
+		TLOOP(src -= wsize; dst -= wsize;
+		    *(word *)(void *)dst = *(const word *)(const void *)src);
+		t = length & wmask;
+		TLOOP(*--dst = *--src);
+	}
+done:
+#if defined(MEMCOPY) || defined(MEMMOVE)
+	return (dst0);
+#else
+	return;
+#endif
+}
diff --git a/libc/arch-riscv64/string/memchr.c b/libc/arch-riscv64/string/memchr.c
new file mode 100644
index 0000000..34eb6d7
--- /dev/null
+++ b/libc/arch-riscv64/string/memchr.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023 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 <upstream-openbsd/android/include/openbsd-compat.h>
+
+#define memchr memchr_gc
+#include <upstream-openbsd/lib/libc/string/memchr.c>
diff --git a/libc/arch-riscv64/string/memchr.S b/libc/arch-riscv64/string/memchr_v.S
similarity index 98%
rename from libc/arch-riscv64/string/memchr.S
rename to libc/arch-riscv64/string/memchr_v.S
index 8833436..d4999c3 100644
--- a/libc/arch-riscv64/string/memchr.S
+++ b/libc/arch-riscv64/string/memchr_v.S
@@ -68,7 +68,7 @@
 #define vData v0
 #define vMask v8
 
-ENTRY(memchr)
+ENTRY(memchr_v)
 
 L(loop):
     vsetvli iVL, iNum, e8, ELEM_LMUL_SETTING, ta, ma
@@ -93,4 +93,4 @@
     add iResult, pSrc, iTemp
     ret
 
-END(memchr)
+END(memchr_v)
diff --git a/libc/arch-riscv64/string/memcmp.c b/libc/arch-riscv64/string/memcmp.c
new file mode 100644
index 0000000..2d7335a
--- /dev/null
+++ b/libc/arch-riscv64/string/memcmp.c
@@ -0,0 +1,52 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * 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. 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.
+ */
+
+#include <string.h>
+
+/*
+ * Compare memory regions.
+ */
+int
+memcmp_gc(const void *s1, const void *s2, size_t n)
+{
+	if (n != 0) {
+		const unsigned char *p1 = s1, *p2 = s2;
+
+		do {
+			if (*p1++ != *p2++)
+				return (*--p1 - *--p2);
+		} while (--n != 0);
+	}
+	return (0);
+}
diff --git a/libc/arch-riscv64/string/memchr.S b/libc/arch-riscv64/string/memcmp_v.S
similarity index 85%
copy from libc/arch-riscv64/string/memchr.S
copy to libc/arch-riscv64/string/memcmp_v.S
index 8833436..55e08db 100644
--- a/libc/arch-riscv64/string/memchr.S
+++ b/libc/arch-riscv64/string/memcmp_v.S
@@ -57,32 +57,38 @@
 
 #define iResult a0
 
-#define pSrc a0
-#define iValue a1
+#define pSrc1 a0
+#define pSrc2 a1
 #define iNum a2
 
 #define iVL a3
 #define iTemp a4
+#define iTemp1 a5
+#define iTemp2 a6
 
 #define ELEM_LMUL_SETTING m8
-#define vData v0
-#define vMask v8
+#define vData1 v0
+#define vData2 v8
+#define vMask v16
 
-ENTRY(memchr)
+ENTRY(memcmp_v)
 
 L(loop):
     vsetvli iVL, iNum, e8, ELEM_LMUL_SETTING, ta, ma
 
-    vle8ff.v vData, (pSrc)
-    vmseq.vx vMask, vData, iValue
+    vle8.v vData1, (pSrc1)
+    vle8.v vData2, (pSrc2)
+
+    vmsne.vv vMask, vData1, vData2
+    sub iNum, iNum, iVL
     vfirst.m iTemp, vMask
 
-    # skip the loop if we find the matched value.
+    /* skip the loop if we find the different
+       value between pSrc1 and pSrc2.  */
     bgez iTemp, L(found)
 
-    csrr iVL, vl
-    sub iNum, iNum, iVL
-    add pSrc, pSrc, iVL
+    add pSrc1, pSrc1, iVL
+    add pSrc2, pSrc2, iVL
 
     bnez iNum, L(loop)
 
@@ -90,7 +96,11 @@
     ret
 
 L(found):
-    add iResult, pSrc, iTemp
+    add pSrc1, pSrc1, iTemp
+    add pSrc2, pSrc2, iTemp
+    lbu iTemp1, 0(pSrc1)
+    lbu iTemp2, 0(pSrc2)
+    sub iResult, iTemp1, iTemp2
     ret
 
-END(memchr)
+END(memcmp_v)
diff --git a/libc/arch-riscv64/string/memcpy.c b/libc/arch-riscv64/string/memcpy.c
new file mode 100644
index 0000000..ee11504
--- /dev/null
+++ b/libc/arch-riscv64/string/memcpy.c
@@ -0,0 +1,2 @@
+#define	MEMCOPY
+#include "bcopy.c"
diff --git a/libc/arch-riscv64/string/memcpy.S b/libc/arch-riscv64/string/memcpy_v.S
similarity index 98%
rename from libc/arch-riscv64/string/memcpy.S
rename to libc/arch-riscv64/string/memcpy_v.S
index def1d9b..93ec60f 100644
--- a/libc/arch-riscv64/string/memcpy.S
+++ b/libc/arch-riscv64/string/memcpy_v.S
@@ -65,7 +65,7 @@
 #define ELEM_LMUL_SETTING m8
 #define vData v0
 
-ENTRY(memcpy)
+ENTRY(memcpy_v)
 
     mv pDstPtr, pDst
 
@@ -82,4 +82,4 @@
 
     ret
 
-END(memcpy)
+END(memcpy_v)
diff --git a/libc/arch-riscv64/string/memmove.c b/libc/arch-riscv64/string/memmove.c
new file mode 100644
index 0000000..e9bb2c2
--- /dev/null
+++ b/libc/arch-riscv64/string/memmove.c
@@ -0,0 +1,2 @@
+#define	MEMMOVE
+#include "bcopy.c"
diff --git a/libc/arch-riscv64/string/memmove.S b/libc/arch-riscv64/string/memmove_v.S
similarity index 98%
rename from libc/arch-riscv64/string/memmove.S
rename to libc/arch-riscv64/string/memmove_v.S
index fa70f76..cad2b05 100644
--- a/libc/arch-riscv64/string/memmove.S
+++ b/libc/arch-riscv64/string/memmove_v.S
@@ -67,7 +67,7 @@
 #define ELEM_LMUL_SETTING m8
 #define vData v0
 
-ENTRY(memmove)
+ENTRY(memmove_v)
 
     mv pDstPtr, pDst
 
@@ -99,4 +99,4 @@
     bnez iNum, L(backward_copy_loop)
     ret
 
-END(memmove)
+END(memmove_v)
diff --git a/libc/arch-riscv64/string/memset.c b/libc/arch-riscv64/string/memset.c
new file mode 100644
index 0000000..d51cbf9
--- /dev/null
+++ b/libc/arch-riscv64/string/memset.c
@@ -0,0 +1,108 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Hibler and 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. 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.
+ */
+
+#include <sys/types.h>
+
+#include <limits.h>
+
+#define	wsize	sizeof(u_long)
+#define	wmask	(wsize - 1)
+
+#include <string.h>
+
+#define	RETURN	return (dst0)
+#define	VAL	c0
+#define	WIDEVAL	c
+
+void *
+memset_gc(void *dst0, int c0, size_t length)
+{
+	size_t t;
+	u_long c;
+	u_char *dst;
+
+	dst = dst0;
+	/*
+	 * If not enough words, just fill bytes.  A length >= 2 words
+	 * guarantees that at least one of them is `complete' after
+	 * any necessary alignment.  For instance:
+	 *
+	 *	|-----------|-----------|-----------|
+	 *	|00|01|02|03|04|05|06|07|08|09|0A|00|
+	 *	          ^---------------------^
+	 *		 dst		 dst+length-1
+	 *
+	 * but we use a minimum of 3 here since the overhead of the code
+	 * to do word writes is substantial.
+	 *
+	 * TODO: This threshold might not be sensible for 64-bit u_long.
+	 * We should benchmark and revisit this decision.
+	 */
+	if (length < 3 * wsize) {
+		while (length != 0) {
+			*dst++ = VAL;
+			--length;
+		}
+		RETURN;
+	}
+
+	if ((c = (u_char)c0) != 0) {	/* Fill the word. */
+		c = (c << 8) | c;	/* u_long is 16 bits. */
+		c = (c << 16) | c;	/* u_long is 32 bits. */
+		c = (c << 32) | c;	/* u_long is 64 bits. */
+	}
+	/* Align destination by filling in bytes. */
+	if ((t = (long)dst & wmask) != 0) {
+		t = wsize - t;
+		length -= t;
+		do {
+			*dst++ = VAL;
+		} while (--t != 0);
+	}
+
+	/* Fill words.  Length was >= 2*words so we know t >= 1 here. */
+	t = length / wsize;
+	do {
+		*(u_long *)(void *)dst = WIDEVAL;
+		dst += wsize;
+	} while (--t != 0);
+
+	/* Mop up trailing bytes, if any. */
+	t = length & wmask;
+	if (t != 0)
+		do {
+			*dst++ = VAL;
+		} while (--t != 0);
+	RETURN;
+}
diff --git a/libc/arch-riscv64/string/memset.S b/libc/arch-riscv64/string/memset_v.S
similarity index 98%
rename from libc/arch-riscv64/string/memset.S
rename to libc/arch-riscv64/string/memset_v.S
index 5aa525e..06a2c6a 100644
--- a/libc/arch-riscv64/string/memset.S
+++ b/libc/arch-riscv64/string/memset_v.S
@@ -66,7 +66,7 @@
 #define ELEM_LMUL_SETTING m8
 #define vData v0
 
-ENTRY(memset)
+ENTRY(memset_v)
 
     mv pDstPtr, pDst
 
@@ -82,4 +82,4 @@
 
     ret
 
-END(memset)
+END(memset_v)
diff --git a/libc/arch-riscv64/string/stpcpy.c b/libc/arch-riscv64/string/stpcpy.c
new file mode 100644
index 0000000..2afcf99
--- /dev/null
+++ b/libc/arch-riscv64/string/stpcpy.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023 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 <upstream-openbsd/android/include/openbsd-compat.h>
+
+#define stpcpy stpcpy_gc
+#include <upstream-openbsd/lib/libc/string/stpcpy.c>
diff --git a/libc/arch-riscv64/string/stpcpy.S b/libc/arch-riscv64/string/stpcpy_v.S
similarity index 98%
rename from libc/arch-riscv64/string/stpcpy.S
rename to libc/arch-riscv64/string/stpcpy_v.S
index c5d0945..6a853ec 100644
--- a/libc/arch-riscv64/string/stpcpy.S
+++ b/libc/arch-riscv64/string/stpcpy_v.S
@@ -68,7 +68,7 @@
 #define vStr1 v8
 #define vStr2 v16
 
-ENTRY(stpcpy)
+ENTRY(stpcpy_v)
 L(stpcpy_loop):
     vsetvli iVL, zero, e8, ELEM_LMUL_SETTING, ta, ma
     vle8ff.v vStr1, (pSrc)
@@ -85,4 +85,4 @@
     sub pDstPtr, pDstPtr, iCurrentVL
     add pDstPtr, pDstPtr, iActiveElemPos
     ret
-END(stpcpy)
+END(stpcpy_v)
diff --git a/libc/arch-riscv64/string/strcat.c b/libc/arch-riscv64/string/strcat.c
new file mode 100644
index 0000000..5fb1621
--- /dev/null
+++ b/libc/arch-riscv64/string/strcat.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023 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 <upstream-openbsd/android/include/openbsd-compat.h>
+
+#define strcat strcat_gc
+#include <upstream-openbsd/lib/libc/string/strcat.c>
diff --git a/libc/arch-riscv64/string/strcat.S b/libc/arch-riscv64/string/strcat_v.S
similarity index 98%
rename from libc/arch-riscv64/string/strcat.S
rename to libc/arch-riscv64/string/strcat_v.S
index 5abf295..3d348e7 100644
--- a/libc/arch-riscv64/string/strcat.S
+++ b/libc/arch-riscv64/string/strcat_v.S
@@ -69,7 +69,7 @@
 #define vStr1 v8
 #define vStr2 v16
 
-ENTRY(strcat)
+ENTRY(strcat_v)
 
     mv pDstPtr, pDst
 
@@ -104,4 +104,4 @@
 
     ret
 
-END(strcat)
+END(strcat_v)
diff --git a/libc/arch-riscv64/string/strchr.c b/libc/arch-riscv64/string/strchr.c
new file mode 100644
index 0000000..dc07766
--- /dev/null
+++ b/libc/arch-riscv64/string/strchr.c
@@ -0,0 +1,43 @@
+/*	$OpenBSD: strchr.c,v 1.4 2018/10/01 06:37:37 martijn Exp $ */
+/*-
+ * Copyright (c) 1990 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. 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.
+ */
+
+#include <string.h>
+
+char *
+strchr_gc(const char *p, int ch)
+{
+	for (;; ++p) {
+		if (*p == (char) ch)
+			return((char *)p);
+		if (!*p)
+			return((char *)NULL);
+	}
+	/* NOTREACHED */
+}
diff --git a/libc/arch-riscv64/string/strchr.S b/libc/arch-riscv64/string/strchr_v.S
similarity index 98%
rename from libc/arch-riscv64/string/strchr.S
rename to libc/arch-riscv64/string/strchr_v.S
index ea13c5d..bc7b58a 100644
--- a/libc/arch-riscv64/string/strchr.S
+++ b/libc/arch-riscv64/string/strchr_v.S
@@ -69,7 +69,7 @@
 #define vMaskEnd v8
 #define vMaskCh v9
 
-ENTRY(strchr)
+ENTRY(strchr_v)
 
 L(strchr_loop):
     vsetvli iVL, zero, e8, ELEM_LMUL_SETTING, ta, ma
@@ -91,4 +91,4 @@
     add pStr, pStr, iChOffset
     ret
 
-END(strchr)
+END(strchr_v)
diff --git a/libc/arch-riscv64/string/strcmp.c b/libc/arch-riscv64/string/strcmp.c
new file mode 100644
index 0000000..7a1fefe
--- /dev/null
+++ b/libc/arch-riscv64/string/strcmp.c
@@ -0,0 +1,47 @@
+/*	$OpenBSD: strcmp.c,v 1.9 2015/08/31 02:53:57 guenther Exp $	*/
+
+/*-
+ * Copyright (c) 1990 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. 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.
+ */
+
+#include <string.h>
+
+/*
+ * Compare strings.
+ */
+int
+strcmp_gc(const char *s1, const char *s2)
+{
+	while (*s1 == *s2++)
+		if (*s1++ == 0)
+			return (0);
+	return (*(unsigned char *)s1 - *(unsigned char *)--s2);
+}
diff --git a/libc/arch-riscv64/string/strcmp.S b/libc/arch-riscv64/string/strcmp_v.S
similarity index 99%
rename from libc/arch-riscv64/string/strcmp.S
rename to libc/arch-riscv64/string/strcmp_v.S
index 3332c83..01e72b1 100644
--- a/libc/arch-riscv64/string/strcmp.S
+++ b/libc/arch-riscv64/string/strcmp_v.S
@@ -74,7 +74,7 @@
 #define vMask1 v16
 #define vMask2 v17
 
-ENTRY(strcmp)
+ENTRY(strcmp_v)
 
     # increase the lmul using the following sequences:
     # 1/2, 1/2, 1, 2, 4, 4, 4, ...
@@ -166,4 +166,4 @@
     sub iResult, iTemp1, iTemp2
     ret
 
-END(strcmp)
+END(strcmp_v)
diff --git a/libc/arch-riscv64/string/strcpy.c b/libc/arch-riscv64/string/strcpy.c
new file mode 100644
index 0000000..a624541
--- /dev/null
+++ b/libc/arch-riscv64/string/strcpy.c
@@ -0,0 +1,41 @@
+/*	$OpenBSD: strcpy.c,v 1.10 2017/11/28 06:55:49 tb Exp $	*/
+
+/*
+ * Copyright (c) 1988 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. 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.
+ */
+
+#include <string.h>
+
+char *
+strcpy_gc(char *to, const char *from)
+{
+	char *save = to;
+
+	for (; (*to = *from) != '\0'; ++from, ++to);
+	return(save);
+}
diff --git a/libc/arch-riscv64/string/strcpy.S b/libc/arch-riscv64/string/strcpy_v.S
similarity index 98%
rename from libc/arch-riscv64/string/strcpy.S
rename to libc/arch-riscv64/string/strcpy_v.S
index b89b1a8..084b3a5 100644
--- a/libc/arch-riscv64/string/strcpy.S
+++ b/libc/arch-riscv64/string/strcpy_v.S
@@ -69,7 +69,7 @@
 #define vStr1 v8
 #define vStr2 v16
 
-ENTRY(strcpy)
+ENTRY(strcpy_v)
 
     mv pDstPtr, pDst
 
@@ -88,4 +88,4 @@
 
     ret
 
-END(strcpy)
+END(strcpy_v)
diff --git a/libc/arch-riscv64/string/strlen.c b/libc/arch-riscv64/string/strlen.c
new file mode 100644
index 0000000..ac8d27f
--- /dev/null
+++ b/libc/arch-riscv64/string/strlen.c
@@ -0,0 +1,42 @@
+/*	$OpenBSD: strlen.c,v 1.9 2015/08/31 02:53:57 guenther Exp $	*/
+
+/*-
+ * 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. 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.
+ */
+
+#include <string.h>
+
+size_t
+strlen_gc(const char *str)
+{
+	const char *s;
+
+	for (s = str; *s; ++s)
+		;
+	return (s - str);
+}
diff --git a/libc/arch-riscv64/string/strlen.S b/libc/arch-riscv64/string/strlen_v.S
similarity index 98%
rename from libc/arch-riscv64/string/strlen.S
rename to libc/arch-riscv64/string/strlen_v.S
index 7f7d2dd..c284021 100644
--- a/libc/arch-riscv64/string/strlen.S
+++ b/libc/arch-riscv64/string/strlen_v.S
@@ -66,7 +66,7 @@
 #define vStr v0
 #define vMaskEnd v2
 
-ENTRY(strlen)
+ENTRY(strlen_v)
 
     mv pCopyStr, pStr
 L(loop):
@@ -84,4 +84,4 @@
 
     ret
 
-END(strlen)
+END(strlen_v)
diff --git a/libc/arch-riscv64/string/strncat.c b/libc/arch-riscv64/string/strncat.c
new file mode 100644
index 0000000..8c26b95
--- /dev/null
+++ b/libc/arch-riscv64/string/strncat.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023 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 <upstream-openbsd/android/include/openbsd-compat.h>
+
+#define strncat strncat_gc
+#include <upstream-openbsd/lib/libc/string/strncat.c>
diff --git a/libc/arch-riscv64/string/strncat.S b/libc/arch-riscv64/string/strncat_v.S
similarity index 98%
rename from libc/arch-riscv64/string/strncat.S
rename to libc/arch-riscv64/string/strncat_v.S
index 01cb14f..adc768d 100644
--- a/libc/arch-riscv64/string/strncat.S
+++ b/libc/arch-riscv64/string/strncat_v.S
@@ -70,7 +70,7 @@
 #define vStr1 v8
 #define vStr2 v16
 
-ENTRY(strncat)
+ENTRY(strncat_v)
 
     mv pDstPtr, pDst
 
@@ -114,4 +114,4 @@
 L(fill_zero_end):
     ret
 
-END(strncat)
+END(strncat_v)
diff --git a/libc/arch-riscv64/string/strncmp.c b/libc/arch-riscv64/string/strncmp.c
new file mode 100644
index 0000000..ebc5357
--- /dev/null
+++ b/libc/arch-riscv64/string/strncmp.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023 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 <upstream-openbsd/android/include/openbsd-compat.h>
+
+#define strncmp strncmp_gc
+#include <upstream-openbsd/lib/libc/string/strncmp.c>
diff --git a/libc/arch-riscv64/string/strncmp.S b/libc/arch-riscv64/string/strncmp_v.S
similarity index 98%
rename from libc/arch-riscv64/string/strncmp.S
rename to libc/arch-riscv64/string/strncmp_v.S
index b9e6ee2..1ce4817 100644
--- a/libc/arch-riscv64/string/strncmp.S
+++ b/libc/arch-riscv64/string/strncmp_v.S
@@ -71,7 +71,7 @@
 #define vMask1 v8
 #define vMask2 v9
 
-ENTRY(strncmp)
+ENTRY(strncmp_v)
 
     beqz iLength, L(zero_length)
 
@@ -116,4 +116,4 @@
     li iResult, 0
     ret
 
-END(strncmp)
+END(strncmp_v)
diff --git a/libc/arch-riscv64/string/strncpy.c b/libc/arch-riscv64/string/strncpy.c
new file mode 100644
index 0000000..bbd1bd7
--- /dev/null
+++ b/libc/arch-riscv64/string/strncpy.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2023 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 <upstream-openbsd/android/include/openbsd-compat.h>
+
+#define strncpy strncpy_gc
+#include <upstream-openbsd/lib/libc/string/strncpy.c>
diff --git a/libc/arch-riscv64/string/strncpy.S b/libc/arch-riscv64/string/strncpy_v.S
similarity index 98%
rename from libc/arch-riscv64/string/strncpy.S
rename to libc/arch-riscv64/string/strncpy_v.S
index 651a064..f133f28 100644
--- a/libc/arch-riscv64/string/strncpy.S
+++ b/libc/arch-riscv64/string/strncpy_v.S
@@ -71,7 +71,7 @@
 #define vStr1 v8
 #define vStr2 v16
 
-ENTRY(strncpy)
+ENTRY(strncpy_v)
 
     mv pDstPtr, pDst
 
@@ -111,4 +111,4 @@
 
     ret
 
-END(strncpy)
+END(strncpy_v)
diff --git a/libc/arch-riscv64/string/strnlen.c b/libc/arch-riscv64/string/strnlen.c
new file mode 100644
index 0000000..0e31c3b
--- /dev/null
+++ b/libc/arch-riscv64/string/strnlen.c
@@ -0,0 +1,32 @@
+/*	$OpenBSD: strnlen.c,v 1.9 2019/01/25 00:19:25 millert Exp $	*/
+
+/*
+ * Copyright (c) 2010 Todd C. Miller <millert@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+
+#include <string.h>
+
+size_t
+strnlen_gc(const char *str, size_t maxlen)
+{
+	const char *cp;
+
+	for (cp = str; maxlen != 0 && *cp != '\0'; cp++, maxlen--)
+		;
+
+	return (size_t)(cp - str);
+}
diff --git a/libc/arch-riscv64/string/strnlen.S b/libc/arch-riscv64/string/strnlen_v.S
similarity index 98%
rename from libc/arch-riscv64/string/strnlen.S
rename to libc/arch-riscv64/string/strnlen_v.S
index 66366f0..bd1bb9a 100644
--- a/libc/arch-riscv64/string/strnlen.S
+++ b/libc/arch-riscv64/string/strnlen_v.S
@@ -66,7 +66,7 @@
 #define vStr v0
 #define vMaskEnd v8
 
-ENTRY(strnlen)
+ENTRY(strnlen_v)
 
     mv pCopyStr, pStr
     mv iRetValue, iMaxlen
@@ -86,4 +86,4 @@
 L(end_strnlen_loop):
     ret
 
-END(strnlen)
+END(strnlen_v)