clang: Fix GCS annotations in compiler-rt on aarch64

Fixes builds for Distros with

TC_CXX_RUNTIME = "llvm"

(From OE-Core rev: 44a550ef2a32eb00dcf5d7efd475d9916548e031)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/clang/clang/0001-compiler-rt-AArch64-Add-GCS-property-in-assembly-fil.patch

@@ -0,0 +1,151 @@
+From 2d102880766a5e55e5d7b4f9a2fb106d7d1ee55c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Csan=C3=A1d=20Hajd=C3=BA?= <csanad.hajdu@arm.com>
+Date: Thu, 7 Aug 2025 16:40:36 +0200
+Subject: [PATCH] [compiler-rt][AArch64] Add GCS property in assembly files
+ (#152502)
+
+Only BTI and PAC properties were added previously.
+
+Fixes https://github.com/llvm/llvm-project/issues/152427.
+
+Upstream-Status: Backport [https://github.com/llvm/llvm-project/pull/152502]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ compiler-rt/lib/builtins/aarch64/lse.S         |  4 ++--
+ compiler-rt/lib/builtins/aarch64/sme-abi.S     |  4 ++--
+ compiler-rt/lib/builtins/assembly.h            | 18 +++++++++++++-----
+ .../lib/hwasan/hwasan_interceptors_vfork.S     |  2 +-
+ compiler-rt/lib/hwasan/hwasan_setjmp_aarch64.S |  2 +-
+ .../lib/hwasan/hwasan_tag_mismatch_aarch64.S   |  2 +-
+ ...zer_common_interceptors_vfork_aarch64.inc.S |  2 +-
+ compiler-rt/lib/tsan/rtl/tsan_rtl_aarch64.S    |  2 +-
+ 8 files changed, 22 insertions(+), 14 deletions(-)
+
+diff --git a/compiler-rt/lib/builtins/aarch64/lse.S b/compiler-rt/lib/builtins/aarch64/lse.S
+index 1fe18f4a4681..abad047096cc 100644
+--- a/compiler-rt/lib/builtins/aarch64/lse.S
++++ b/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 // __aarch64__
+diff --git a/compiler-rt/lib/builtins/aarch64/sme-abi.S b/compiler-rt/lib/builtins/aarch64/sme-abi.S
+index 8dbbe061edb9..29d7ad53047d 100644
+--- a/compiler-rt/lib/builtins/aarch64/sme-abi.S
++++ b/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
+diff --git a/compiler-rt/lib/builtins/assembly.h b/compiler-rt/lib/builtins/assembly.h
+index 34c71241524d..a554c10c18ac 100644
+--- a/compiler-rt/lib/builtins/assembly.h
++++ b/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)
+diff --git a/compiler-rt/lib/hwasan/hwasan_interceptors_vfork.S b/compiler-rt/lib/hwasan/hwasan_interceptors_vfork.S
+index fd20825e3dac..825f41156509 100644
+--- a/compiler-rt/lib/hwasan/hwasan_interceptors_vfork.S
++++ b/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
+diff --git a/compiler-rt/lib/hwasan/hwasan_setjmp_aarch64.S b/compiler-rt/lib/hwasan/hwasan_setjmp_aarch64.S
+index 0c0abb6de861..b8d98b09ada2 100644
+--- a/compiler-rt/lib/hwasan/hwasan_setjmp_aarch64.S
++++ b/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
+diff --git a/compiler-rt/lib/hwasan/hwasan_tag_mismatch_aarch64.S b/compiler-rt/lib/hwasan/hwasan_tag_mismatch_aarch64.S
+index fd060c51cd8e..be82475101c8 100644
+--- a/compiler-rt/lib/hwasan/hwasan_tag_mismatch_aarch64.S
++++ b/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
+diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_vfork_aarch64.inc.S b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_vfork_aarch64.inc.S
+index cdfa6f1d7f53..5066953980af 100644
+--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_vfork_aarch64.inc.S
++++ b/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
+diff --git a/compiler-rt/lib/tsan/rtl/tsan_rtl_aarch64.S b/compiler-rt/lib/tsan/rtl/tsan_rtl_aarch64.S
+index 7d920bee4a2d..f1d11a3e7f54 100644
+--- a/compiler-rt/lib/tsan/rtl/tsan_rtl_aarch64.S
++++ b/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

meta/recipes-devtools/clang/common.inc

@@ -62,6 +62,7 @@ SRC_URI = "\
     file://0001-libclc-allow-existing-prepare-builtins-in-standalone.patch \
     file://no-c-index-test.patch \
     file://0001-llvm-Allow-users-to-set-LLVM_HAVE_OPT_VIEWER_MODULES.patch \
+    file://0001-compiler-rt-AArch64-Add-GCS-property-in-assembly-fil.patch \
 "
 # Fallback to no-PIE if not set
 GCCPIE ??= ""