x86/cet: Check legacy shadow stack code in .init_array section

Verify that legacy shadow stack code in .init_array section in application
and shared library, which are marked as shadow stack enabled, will trigger
segfault.

1 files changed, 34 insertions, 0 deletions

diff --git a/sysdeps/x86/tst-shstk-legacy-1g.sh b/sysdeps/x86/tst-shstk-legacy-1g.sh
new file mode 100755
index 0000000000..c112bf6d8d
--- /dev/null
+++ b/sysdeps/x86/tst-shstk-legacy-1g.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+# Check that legacy shadow stack code in init_array will trigger
+# segfault.
+# Copyright (C) 2023 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/>.
+
+common_objpfx=$1; shift
+test_program_prefix=$1; shift
+
+${test_program_prefix} \
+  ${common_objpfx}elf/tst-shstk-legacy-1g
+# The exit status should only be unsupported (77) or segfault (139).
+status=$?
+if test $status -eq 77; then
+  exit 77
+elif test $status == 139; then
+  exit 0
+else
+  exit 1
+fi