1 files changed, 89 insertions, 0 deletions
diff --git a/sysdeps/x86_64/tst-cet-legacy-6.c b/sysdeps/x86_64/tst-cet-legacy-6.c
new file mode 100644
index 0000000000..1cfe8e8bd8
--- /dev/null
+++ b/sysdeps/x86_64/tst-cet-legacy-6.c
@@ -0,0 +1,89 @@
+/* Check compatibility of CET-enabled executable with dlopened legacy
+   shared object.
+   Copyright (C) 2019-2024 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <x86intrin.h>
+#include <support/check.h>
+
+#if defined CET_IS_PERMISSIVE || defined CET_DISABLED_BY_ENV
+# define CET_MAYBE_DISABLED 1
+#else
+# define CET_MAYBE_DISABLED 0
+#endif
+
+static void
+do_test_1 (const char *modname, bool fail)
+{
+  int (*fp) (void);
+  void *h;
+
+  /* NB: dlopen should never fail on non-CET platforms.  If SHSTK is
+     disabled, assuming IBT is also disabled.  */
+  bool cet_enabled = _get_ssp () != 0 && !CET_MAYBE_DISABLED;
+  if (!cet_enabled)
+    fail = false;
+
+  h = dlopen (modname, RTLD_LAZY);
+  if (h == NULL)
+    {
+      const char *err = dlerror ();
+      if (fail)
+	{
+	  if (strstr (err, "rebuild shared object with SHSTK support enabled")
+	      == NULL)
+	    FAIL_EXIT1 ("incorrect dlopen '%s' error: %s\n", modname, err);
+
+	  return;
+	}
+
+      FAIL_EXIT1 ("cannot open '%s': %s\n", modname, err);
+    }
+
+  if (fail)
+    FAIL_EXIT1 ("dlopen should have failed\n");
+
+  fp = dlsym (h, "test");
+  if (fp == NULL)
+    {
+      printf ("cannot get symbol 'test': %s\n", dlerror ());
+      exit (1);
+    }
+
+  if (fp () != 0)
+    {
+      puts ("test () != 0");
+      exit (1);
+    }
+
+  dlclose (h);
+}
+
+static int
+do_test (void)
+{
+  do_test_1 ("tst-cet-legacy-mod-6a.so", true);
+  do_test_1 ("tst-cet-legacy-mod-6b.so", false);
+  return 0;
+}
+
+#include <support/test-driver.c>