r292@cf-ppc-macosx: monabuilder | 2008-12-09 00:39:42 +0900

[pf3gnuchains/pf3gnuchains3x.git] / libssp / vsnprintf-chk.c

diff --git a/libssp/vsnprintf-chk.c b/libssp/vsnprintf-chk.c
new file mode 100644 (file)
index 0000000..2e86df5
--- /dev/null
+++ b/libssp/vsnprintf-chk.c
@@ -0,0 +1,55 @@
+/* Checking vsnprintf.
+   Copyright (C) 2005 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file.  (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+GCC 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.  */
+
+/* As a special exception, if you link this library with files compiled with
+   GCC to produce an executable, this does not cause the resulting executable
+   to be covered by the GNU General Public License. This exception does not
+   however invalidate any other reasons why the executable file might be
+   covered by the GNU General Public License.  */
+
+#include "config.h"
+#include <ssp/ssp.h>
+#include <stdarg.h>
+#ifdef HAVE_STDIO_H
+# include <stdio.h>
+#endif
+
+extern void __chk_fail (void) __attribute__((__noreturn__));
+
+#ifdef HAVE_USABLE_VSNPRINTF
+int
+__vsnprintf_chk (char *s, size_t n, int flags __attribute__((unused)),
+                size_t slen, const char *format, va_list arg)
+{
+  if (n > slen)
+    __chk_fail ();
+
+  return vsnprintf (s, n, format, arg);
+}
+#endif