[compiler-rt][AArch64] Add GCS property in assembly files (#152502)

Only BTI and PAC properties were added previously.

Fixes #152427.

Author: Il-Capitano

compiler-rt/lib/builtins/aarch64/lse.S

@@ -264,7 +264,7 @@ END_COMPILERRT_OUTLINE_FUNCTION(NAME(LDNM))
 
 NO_EXEC_STACK_DIRECTIVE
 
-// GNU property note for BTI and PAC
-GNU_PROPERTY_BTI_PAC
+// GNU property note for BTI, PAC, and GCS
+GNU_PROPERTY_BTI_PAC_GCS
 
 #endif // defined(__aarch64__) || defined(__arm64ec__)

compiler-rt/lib/builtins/aarch64/sme-abi.S

@@ -371,5 +371,5 @@ END_COMPILERRT_FUNCTION(__arm_sme_restore)
 
 NO_EXEC_STACK_DIRECTIVE
 
-// GNU property note for BTI and PAC
-GNU_PROPERTY_BTI_PAC
+// GNU property note for BTI, PAC, and GCS
+GNU_PROPERTY_BTI_PAC_GCS

compiler-rt/lib/builtins/assembly.h

@@ -79,11 +79,12 @@
 #define FUNC_ALIGN
 #endif
 
-// BTI and PAC gnu property note
+// BTI, PAC, and GCS gnu property note
 #define NT_GNU_PROPERTY_TYPE_0 5
 #define GNU_PROPERTY_AARCH64_FEATURE_1_AND 0xc0000000
 #define GNU_PROPERTY_AARCH64_FEATURE_1_BTI 1
 #define GNU_PROPERTY_AARCH64_FEATURE_1_PAC 2
+#define GNU_PROPERTY_AARCH64_FEATURE_1_GCS 4
 
 #if defined(__ARM_FEATURE_BTI_DEFAULT)
 #define BTI_FLAG GNU_PROPERTY_AARCH64_FEATURE_1_BTI
@@ -97,6 +98,12 @@
 #define PAC_FLAG 0
 #endif
 
+#if defined(__ARM_FEATURE_GCS_DEFAULT)
+#define GCS_FLAG GNU_PROPERTY_AARCH64_FEATURE_1_GCS
+#else
+#define GCS_FLAG 0
+#endif
+
 #define GNU_PROPERTY(type, value)                                              \
   .pushsection .note.gnu.property, "a" SEPARATOR                               \
   .p2align 3 SEPARATOR                                                         \
@@ -118,11 +125,12 @@
 #define BTI_J
 #endif
 
-#if (BTI_FLAG | PAC_FLAG) != 0
-#define GNU_PROPERTY_BTI_PAC                                                   \
-  GNU_PROPERTY(GNU_PROPERTY_AARCH64_FEATURE_1_AND, BTI_FLAG | PAC_FLAG)
+#if (BTI_FLAG | PAC_FLAG | GCS_FLAG) != 0
+#define GNU_PROPERTY_BTI_PAC_GCS                                               \
+  GNU_PROPERTY(GNU_PROPERTY_AARCH64_FEATURE_1_AND,                             \
+               BTI_FLAG | PAC_FLAG | GCS_FLAG)
 #else
-#define GNU_PROPERTY_BTI_PAC
+#define GNU_PROPERTY_BTI_PAC_GCS
 #endif
 
 #if defined(__clang__) || defined(__GCC_HAVE_DWARF2_CFI_ASM)

compiler-rt/lib/hwasan/hwasan_interceptors_vfork.S

@@ -11,4 +11,4 @@
 
 NO_EXEC_STACK_DIRECTIVE
 
-GNU_PROPERTY_BTI_PAC
+GNU_PROPERTY_BTI_PAC_GCS

compiler-rt/lib/hwasan/hwasan_setjmp_aarch64.S

@@ -99,4 +99,4 @@ ASM_TRAMPOLINE_ALIAS(_setjmp, setjmp)
 // We do not need executable stack.
 NO_EXEC_STACK_DIRECTIVE
 
-GNU_PROPERTY_BTI_PAC
+GNU_PROPERTY_BTI_PAC_GCS

compiler-rt/lib/hwasan/hwasan_tag_mismatch_aarch64.S

@@ -157,4 +157,4 @@ mismatch:
 // We do not need executable stack.
 NO_EXEC_STACK_DIRECTIVE
 
-GNU_PROPERTY_BTI_PAC
+GNU_PROPERTY_BTI_PAC_GCS

compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_vfork_aarch64.inc.S

@@ -43,6 +43,6 @@ ASM_SIZE(vfork)
 ASM_INTERCEPTOR_TRAMPOLINE(vfork)
 ASM_TRAMPOLINE_ALIAS(vfork, vfork)
 
-GNU_PROPERTY_BTI_PAC
+GNU_PROPERTY_BTI_PAC_GCS
 
 #endif

compiler-rt/lib/tsan/rtl/tsan_rtl_aarch64.S

@@ -222,6 +222,6 @@ ASM_SIZE(ASM_SYMBOL_INTERCEPTOR(__sigsetjmp))
 
 NO_EXEC_STACK_DIRECTIVE
 
-GNU_PROPERTY_BTI_PAC
+GNU_PROPERTY_BTI_PAC_GCS
 
 #endif