1 files changed, 80 insertions, 0 deletions

diff --git a/src/lib/libc/stdlib/abort.c b/src/lib/libc/stdlib/abort.c
new file mode 100644
index 0000000000..4c8dc70a1d
--- /dev/null
+++ b/src/lib/libc/stdlib/abort.c
@@ -0,0 +1,80 @@
+/*      $OpenBSD: abort.c,v 1.16 2012/11/10 03:46:11 guenther Exp $ */
+/*
+ * Copyright (c) 1985 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 <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "thread_private.h"
+#include "atexit.h"
+
+int     _thread_sys_sigprocmask(int, const sigset_t *, sigset_t *);
+
+void
+abort(void)
+{
+        struct atexit *p = __atexit;
+        static int cleanup_called = 0;
+        sigset_t mask;
+
+
+        sigfillset(&mask);
+        /*
+         * don't block SIGABRT to give any handler a chance; we ignore
+         * any errors -- X311J doesn't allow abort to return anyway.
+         */
+        sigdelset(&mask, SIGABRT);
+        (void)_thread_sys_sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
+
+        /*
+         * POSIX requires we flush stdio buffers on abort
+         */
+        if (cleanup_called == 0) {
+                /* the cleanup routine lives in fns[0] on the last page */
+                while (p != NULL && p->next != NULL)
+                        p = p->next;
+                /* the check for fn_dso == NULL is mostly paranoia */
+                if (p != NULL && p->fns[0].fn_dso == NULL &&
+                    p->fns[0].fn_ptr.std_func != NULL) {
+                        cleanup_called = 1;
+                        (*p->fns[0].fn_ptr.std_func)();
+                }
+        }
+
+        (void)raise(SIGABRT);
+
+        /*
+         * if SIGABRT ignored, or caught and the handler returns, do
+         * it again, only harder.
+         */
+        (void)signal(SIGABRT, SIG_DFL);
+        (void)_thread_sys_sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
+        (void)raise(SIGABRT);
+        _exit(1);
+}