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+/* Common Linux target-dependent definitions for AArch64 GCS
+
+ Copyright (C) 2025 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program 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 of the License, or
+ (at your option) any later version.
+
+ This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef GDB_ARCH_AARCH64_GCS_LINUX_H
+#define GDB_ARCH_AARCH64_GCS_LINUX_H
+
+#include <stdint.h>
+
+/* Feature check for Guarded Control Stack. */
+#ifndef HWCAP_GCS
+#define HWCAP_GCS (1ULL << 32)
+#endif
+
+/* Make sure we only define these if the kernel header doesn't. */
+#ifndef GCS_MAGIC
+
+/* GCS state (NT_ARM_GCS). */
+
+struct user_gcs
+{
+ uint64_t features_enabled;
+ uint64_t features_locked;
+ uint64_t gcspr_el0;
+};
+
+#endif /* GCS_MAGIC */
+
+#endif /* GDB_ARCH_AARCH64_GCS_LINUX_H */