--- /dev/null
+++ Libc/Libc-391.2.3/stdlib/FreeBSD/abort.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 1985, 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 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 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)abort.c	8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/stdlib/abort.c,v 1.9 2003/08/16 11:43:57 davidxu Exp $");
+
+#include "namespace.h"
+#include <signal.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <pthread.h>
+#include "un-namespace.h"
+
+void (*__cleanup)();
+
+void
+abort()
+{
+	struct sigaction act;
+
+	/*
+	 * POSIX requires we flush stdio buffers on abort.
+	 * XXX ISO C requires that abort() be async-signal-safe.
+	 */
+	if (__cleanup)
+		(*__cleanup)();
+
+	sigfillset(&act.sa_mask);
+	/*
+	 * Don't block SIGABRT to give any handler a chance; we ignore
+	 * any errors -- ISO C doesn't allow abort to return anyway.
+	 */
+	sigdelset(&act.sa_mask, SIGABRT);
+	(void)_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
+	(void)raise(SIGABRT);
+
+	/*
+	 * If SIGABRT was ignored, or caught and the handler returns, do
+	 * it again, only harder.
+	 */
+	act.sa_handler = SIG_DFL;
+	act.sa_flags = 0;
+	sigfillset(&act.sa_mask);
+	(void)_sigaction(SIGABRT, &act, NULL);
+	sigdelset(&act.sa_mask, SIGABRT);
+	(void)_sigprocmask(SIG_SETMASK, &act.sa_mask, NULL);
+	(void)raise(SIGABRT);
+	exit(1);
+}