[PATCH v3 19/23] aarch64: libatomic: add GCS marking to asm

[Yury Khrustalev]

From: Szabolcs Nagy <szabolcs.n...@arm.com>

libatomic/ChangeLog:

        * config/linux/aarch64/atomic_16.S (FEATURE_1_GCS): Define.
        (GCS_FLAG): Define if GCS is enabled.
        (GNU_PROPERTY): Add GCS_FLAG.
---
 libatomic/config/linux/aarch64/atomic_16.S | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/libatomic/config/linux/aarch64/atomic_16.S 
b/libatomic/config/linux/aarch64/atomic_16.S
index 5767fba5c03..685db776382 100644
--- a/libatomic/config/linux/aarch64/atomic_16.S
+++ b/libatomic/config/linux/aarch64/atomic_16.S
@@ -775,6 +775,7 @@ END_FEAT (compare_exchange_16, LSE)
 #define FEATURE_1_AND 0xc0000000
 #define FEATURE_1_BTI 1
 #define FEATURE_1_PAC 2
+#define FEATURE_1_GCS 4
 
 /* Supported features based on the code generation options.  */
 #if defined(__ARM_FEATURE_BTI_DEFAULT)
@@ -789,6 +790,12 @@ END_FEAT (compare_exchange_16, LSE)
 # define PAC_FLAG 0
 #endif
 
+#if __ARM_FEATURE_GCS_DEFAULT
+# define GCS_FLAG FEATURE_1_GCS
+#else
+# define GCS_FLAG 0
+#endif
+
 /* Add a NT_GNU_PROPERTY_TYPE_0 note.  */
 #define GNU_PROPERTY(type, value)      \
   .section .note.gnu.property, "a";     \
@@ -806,7 +813,7 @@ END_FEAT (compare_exchange_16, LSE)
 .section .note.GNU-stack, "", %progbits
 
 /* Add GNU property note if built with branch protection.  */
-# if (BTI_FLAG|PAC_FLAG) != 0
-GNU_PROPERTY (FEATURE_1_AND, BTI_FLAG|PAC_FLAG)
+# if (BTI_FLAG|PAC_FLAG|GCS_FLAG) != 0
+GNU_PROPERTY (FEATURE_1_AND, BTI_FLAG|PAC_FLAG|GCS_FLAG)
 # endif
 #endif
-- 
2.39.5