Initial Contribution
diff --git a/libc/include/setjmp.h b/libc/include/setjmp.h
new file mode 100644
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--- /dev/null
+++ b/libc/include/setjmp.h
@@ -0,0 +1,78 @@
+/* $OpenBSD: setjmp.h,v 1.5 2005/12/13 00:35:22 millert Exp $ */
+/* $NetBSD: setjmp.h,v 1.11 1994/12/20 10:35:44 cgd Exp $ */
+
+/*-
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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.
+ *
+ * @(#)setjmp.h 8.2 (Berkeley) 1/21/94
+ */
+
+#ifndef _SETJMP_H_
+#define _SETJMP_H_
+
+#include <sys/cdefs.h>
+#include <machine/setjmp.h>
+
+#if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE
+typedef long sigjmp_buf[_JBLEN + 1];
+#endif /* __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE */
+
+typedef long jmp_buf[_JBLEN];
+
+__BEGIN_DECLS
+
+/* BIONIC SPECIAL: we *don't* save the signal mask in setjmp/longjmp
+ * this means we comply with ANSI, not with POSIX, and
+ * our runtime runs well instead of getting stuck
+ */
+#if 1
+#define setjmp(x) _setjmp(x)
+#define longjmp(x,y) _longjmp(x,y)
+#else
+int setjmp(jmp_buf);
+void longjmp(jmp_buf, int);
+#endif
+
+#if __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE
+int sigsetjmp(sigjmp_buf, int);
+void siglongjmp(sigjmp_buf, int);
+#endif /* __BSD_VISIBLE || __POSIX_VISIBLE || __XPG_VISIBLE */
+
+#if __BSD_VISIBLE || __XPG_VISIBLE
+int _setjmp(jmp_buf);
+void _longjmp(jmp_buf, int);
+void longjmperror(void);
+#endif /* __BSD_VISIBLE || __XPG_VISIBLE */
+__END_DECLS
+
+#endif /* !_SETJMP_H_ */