1 files changed, 58 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/tst-gcs-skeleton.c b/sysdeps/unix/sysv/linux/aarch64/tst-gcs-skeleton.c
new file mode 100644
index 0000000000..37692c96d0
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/aarch64/tst-gcs-skeleton.c
@@ -0,0 +1,58 @@
+/* AArch64 tests for GCS.
+   Copyright (C) 2025 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 <support/check.h>
+#include <support/support.h>
+#include <support/test-driver.h>
+
+#include <stdio.h>
+#include <sys/auxv.h>
+
+static bool __check_gcs_status (void)
+{
+  register unsigned long x16 asm ("x16");
+  asm volatile (
+    "mov	x16, #1 /* _CHKFEAT_GCS */\n"
+    "hint	40 /* CHKFEAT_X16 */\n"
+    : "=r" (x16));
+  return x16 ^ 1;
+}
+
+static int
+do_test (void)
+{
+  /* Check if GCS could possible by enabled.  */
+  if (!(getauxval (AT_HWCAP) & HWCAP_GCS))
+    {
+      puts ("kernel or CPU does not support GCS");
+      return EXIT_UNSUPPORTED;
+    }
+  bool gcs_enabled = __check_gcs_status ();
+  if (gcs_enabled)
+    puts ("GCS enabled");
+  else
+    puts ("GCS not enabled");
+#if TEST_GCS_EXPECT_ENABLED
+  TEST_VERIFY (gcs_enabled);
+#else
+  TEST_VERIFY (!gcs_enabled);
+#endif
+  return 0;
+}
+
+#include <support/test-driver.c>