1 files changed, 64 insertions, 0 deletions
diff --git a/elf/dlerror.c b/elf/dlerror.c
new file mode 100644
index 0000000000..0eed60a45d
--- /dev/null
+++ b/elf/dlerror.c
@@ -0,0 +1,64 @@
+/* dlerror -- Return error detail for failing <dlfcn.h> functions.
+Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <link.h>
+#include <dlfcn.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+static int _dl_last_errcode;
+static const char *_dl_last_errstring;
+
+char *
+dlerror (void)
+{
+ char *ret;
+
+  if (! _dl_last_errstring)
+    return NULL;
+
+  if (_dl_last_errcode)
+    {
+      static char *buf;
+      if (buf)
+	{
+	  free (buf);
+	  buf = NULL;
+	}
+      if (asprintf (&buf, "%s: %s",
+		    _dl_last_errstring, strerror (_dl_last_errcode)) == -1)
+	return NULL;
+      else
+	ret = buf;
+    }
+ else
+   ret = (char *) _dl_last_errstring;
+
+ /* Reset the error indicator.  */
+ _dl_last_errstring = NULL;
+ return ret;
+}
+
+int
+_dlerror_run (void (*operate) (void))
+{
+  _dl_last_errcode = _dl_catch_error (&_dl_last_errstring, operate);
+  return _dl_last_errstring != NULL;
+}