From: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Thu, 14 Nov 2024 16:15:11 +0000 (+0000)
Subject: aarch64: Emit GNU property NOTE for GCS
X-Git-Tag: basepoints/gcc-16~4280
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=608da244019424852215d41019278b2f4e3962c5;p=thirdparty%2Fgcc.git

aarch64: Emit GNU property NOTE for GCS

gcc/ChangeLog:

	* config/aarch64/aarch64.cc (GNU_PROPERTY_AARCH64_FEATURE_1_GCS):
	Define.
	(aarch64_file_end_indicate_exec_stack): Set GCS property bit.
---

diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index 68230e1f4c2d..7c41f3960231 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -29544,6 +29544,7 @@ aarch64_can_tag_addresses ()
 #define GNU_PROPERTY_AARCH64_FEATURE_1_AND	0xc0000000
 #define GNU_PROPERTY_AARCH64_FEATURE_1_BTI	(1U << 0)
 #define GNU_PROPERTY_AARCH64_FEATURE_1_PAC	(1U << 1)
+#define GNU_PROPERTY_AARCH64_FEATURE_1_GCS	(1U << 2)
 void
 aarch64_file_end_indicate_exec_stack ()
 {
@@ -29556,6 +29557,9 @@ aarch64_file_end_indicate_exec_stack ()
   if (aarch_ra_sign_scope != AARCH_FUNCTION_NONE)
     feature_1_and |= GNU_PROPERTY_AARCH64_FEATURE_1_PAC;
 
+  if (aarch64_gcs_enabled ())
+    feature_1_and |= GNU_PROPERTY_AARCH64_FEATURE_1_GCS;
+
   if (feature_1_and)
     {
       /* Generate .note.gnu.property section.  */
@@ -29587,6 +29591,7 @@ aarch64_file_end_indicate_exec_stack ()
       assemble_align (POINTER_SIZE);
     }
 }
+#undef GNU_PROPERTY_AARCH64_FEATURE_1_GCS
 #undef GNU_PROPERTY_AARCH64_FEATURE_1_PAC
 #undef GNU_PROPERTY_AARCH64_FEATURE_1_BTI
 #undef GNU_PROPERTY_AARCH64_FEATURE_1_AND