https://gcc.gnu.org/g:78b29b5934193bd7e057aa8196ab8645df092d44
commit 78b29b5934193bd7e057aa8196ab8645df092d44
Author: Szabolcs Nagy <szabolcs.n...@arm.com>
Date: Fri Dec 22 15:11:25 2023 +0000
aarch64: libatomic: add GCS marking to asm
libatomic/ChangeLog:
* config/linux/aarch64/atomic_16.S (FEATURE_1_GCS): Define.
(GCS_FLAG): Define if GCS is enabled.
(GNU_PROPERTY): Add GCS_FLAG.
Diff:
---
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 4e3fa870b03..d6f34eee146 100644
--- a/libatomic/config/linux/aarch64/atomic_16.S
+++ b/libatomic/config/linux/aarch64/atomic_16.S
@@ -790,6 +790,7 @@ ALIAS2 (test_and_set_16)
#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)
@@ -804,6 +805,12 @@ ALIAS2 (test_and_set_16)
# 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"; \
@@ -821,7 +828,7 @@ ALIAS2 (test_and_set_16)
.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
