--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libssp/ssp.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,183 @@
+/* Stack protector support.
+   Copyright (C) 2005, 2009 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 3, 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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+
+#include "config.h"
+#ifdef HAVE_ALLOCA_H
+# include <alloca.h>
+#endif
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#endif
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+#ifndef _PATH_TTY
+/* Native win32 apps don't know about /dev/tty but can print directly
+   to the console using  "CONOUT$"   */
+#if defined (_WIN32) && !defined (__CYGWIN__)
+# define _PATH_TTY "CONOUT$"
+#else
+# define _PATH_TTY "/dev/tty"
+#endif
+#endif
+#ifdef HAVE_SYSLOG_H
+# include <syslog.h>
+#endif
+
+void *__stack_chk_guard = 0;
+
+static void __attribute__ ((constructor))
+__guard_setup (void)
+{
+  unsigned char *p;
+  int fd;
+
+  if (__stack_chk_guard != 0)
+    return;
+
+  fd = open ("/dev/urandom", O_RDONLY);
+  if (fd != -1)
+    {
+      ssize_t size = read (fd, &__stack_chk_guard,
+                           sizeof (__stack_chk_guard));
+      close (fd);
+      if (size == sizeof(__stack_chk_guard) && __stack_chk_guard != 0)
+        return;
+    }
+
+  /* If a random generator can't be used, the protector switches the guard
+     to the "terminator canary".  */
+  p = (unsigned char *) &__stack_chk_guard;
+  p[sizeof(__stack_chk_guard)-1] = 255;
+  p[sizeof(__stack_chk_guard)-2] = '\n';
+  p[0] = 0;
+}
+
+static void
+fail (const char *msg1, size_t msg1len, const char *msg3)
+{
+#ifdef __GNU_LIBRARY__
+  extern char * __progname;
+#else
+  static const char __progname[] = "";
+#endif
+  int fd;
+
+  /* Print error message directly to the tty.  This avoids Bad Things
+     happening if stderr is redirected.  */
+  fd = open (_PATH_TTY, O_WRONLY);
+  if (fd != -1)
+    {
+      static const char msg2[] = " terminated\n";
+      size_t progname_len, len;
+      char *buf, *p;
+
+      progname_len = strlen (__progname);
+      len = msg1len + progname_len + sizeof(msg2)-1 + 1;
+      p = buf = alloca (len);
+
+      memcpy (p, msg1, msg1len);
+      p += msg1len;
+      memcpy (p, __progname, progname_len);
+      p += progname_len;
+      memcpy (p, msg2, sizeof(msg2));
+
+      while (len > 0)
+        {
+          ssize_t wrote = write (fd, buf, len);
+          if (wrote < 0)
+            break;
+          buf += wrote;
+          len -= wrote;
+        }
+      close (fd);
+    }
+
+#ifdef HAVE_SYSLOG_H
+  /* Only send the error to syslog if there was no tty available.  */
+  else
+    syslog (LOG_CRIT, msg3);
+#endif /* HAVE_SYSLOG_H */
+
+  /* Try very hard to exit.  Note that signals may be blocked preventing
+     the first two options from working.  The use of volatile is here to
+     prevent optimizers from "knowing" that __builtin_trap is called first,
+     and that it doesn't return, and so "obviously" the rest of the code
+     is dead.  */
+  {
+    volatile int state;
+    for (state = 0; ; state++)
+      switch (state)
+        {
+        case 0:
+          __builtin_trap ();
+          break;
+        case 1:
+          *(volatile int *)-1L = 0;
+          break;
+        case 2:
+          _exit (127);
+          break;
+        }
+  }
+}
+
+void
+__stack_chk_fail (void)
+{
+  const char *msg = "*** stack smashing detected ***: ";
+  fail (msg, strlen (msg), "stack smashing detected: terminated");
+}
+
+void
+__chk_fail (void)
+{
+  const char *msg = "*** buffer overflow detected ***: ";
+  fail (msg, strlen (msg), "buffer overflow detected: terminated");
+}
+
+#ifdef HAVE_HIDDEN_VISIBILITY
+void
+__attribute__((visibility ("hidden")))
+__stack_chk_fail_local (void)
+{
+  __stack_chk_fail ();
+}
+#endif