auto import from //depot/cupcake/@135843
diff --git a/libc/arch-arm/bionic/clone.S b/libc/arch-arm/bionic/clone.S
new file mode 100644
index 0000000..791c73d
--- /dev/null
+++ b/libc/arch-arm/bionic/clone.S
@@ -0,0 +1,74 @@
+/*
+ * 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 <sys/linux-syscalls.h>
+
+ .text
+ .type __pthread_clone, #function
+ .global __pthread_clone
+ .align 4
+
+__pthread_clone:
+ @ insert the args onto the new stack
+ str r0, [r1, #-4]
+ str r3, [r1, #-8]
+
+ @ do the system call
+ @ get flags
+
+ mov r0, r2
+
+ @ new sp is already in r1
+
+#if __ARM_EABI__
+ stmfd sp!, {r4, r7}
+ ldr r7, =__NR_clone
+ swi #0
+#else
+ swi #__NR_clone
+#endif
+
+ movs r0, r0
+#if __ARM_EABI__
+ ldmnefd sp!, {r4, r7}
+#endif
+ blt __error
+ bxne lr
+
+
+ @ pick the function arg and call address off the stack and jump
+ @ to the C __thread_entry function which does some setup and then
+ @ calls the thread's start function
+
+ ldr r0, [sp, #-4]
+ ldr r1, [sp, #-8]
+ mov r2, sp @ __thread_entry needs the TLS pointer
+ b __thread_entry
+
+__error:
+ mov r0, #-1
+ bx lr