auto import from //depot/cupcake/@135843
diff --git a/libc/arch-arm/bionic/sigsetjmp.S b/libc/arch-arm/bionic/sigsetjmp.S
new file mode 100644
index 0000000..50e6429
--- /dev/null
+++ b/libc/arch-arm/bionic/sigsetjmp.S
@@ -0,0 +1,62 @@
+/* $OpenBSD: sigsetjmp.S,v 1.2 2004/02/01 05:40:52 drahn Exp $ */
+/* $NetBSD: sigsetjmp.S,v 1.3 2002/08/17 19:54:30 thorpej Exp $ */
+
+/*
+ * Copyright (c) 1997 Mark Brinicombe
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Mark Brinicombe
+ * 4. 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 AUTHOR 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 AUTHOR 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 <machine/asm.h>
+#include <machine/setjmp.h>
+
+/*
+ * C library -- sigsetjmp, siglongjmp
+ *
+ * longjmp(a,v)
+ * will generate a "return(v)" from the last call to
+ * setjmp(a, m)
+ * by restoring registers from the stack.
+ * The previous signal state is restored.
+ */
+
+ENTRY(sigsetjmp)
+ teq r1, #0
+ beq PIC_SYM(_C_LABEL(_setjmp), PLT)
+ b PIC_SYM(_C_LABEL(setjmp), PLT)
+
+.L_setjmp_magic:
+ .word _JB_MAGIC__SETJMP
+
+ENTRY(siglongjmp)
+ ldr r2, .L_setjmp_magic
+ ldr r3, [r0]
+ teq r2, r3
+ beq PIC_SYM(_C_LABEL(_longjmp), PLT)
+ b PIC_SYM(_C_LABEL(longjmp), PLT)