[libunwind] [libunwind] Add GCS support for AArch64 (PR #99335)

[via cfe-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff 554febd3aad8d7cea7b8f8f6124d691031fb618c e0f71863bd2f797c9208bdfc559bb69ade5a653a --extensions hpp,h,c -- libunwind/src/Registers.hpp libunwind/src/UnwindLevel1.c libunwind/src/cet_unwind.h
``````````

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/libunwind/src/UnwindLevel1.c b/libunwind/src/UnwindLevel1.c
index 67a324947c..2f100353e7 100644
--- a/libunwind/src/UnwindLevel1.c
+++ b/libunwind/src/UnwindLevel1.c
@@ -188,7 +188,8 @@ extern int __unw_step_stage2(unw_cursor_t *);
 __attribute__((target("gcs")))
 #endif
 static _Unwind_Reason_Code
-unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *exception_object) {
+unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor,
+              _Unwind_Exception *exception_object) {
   __unw_init_local(cursor, uc);
 
   _LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_obj=%p)",
@@ -336,8 +337,8 @@ __attribute__((target("gcs")))
 #endif
 static _Unwind_Reason_Code
 unwind_phase2_forced(unw_context_t *uc, unw_cursor_t *cursor,
-                     _Unwind_Exception *exception_object,
-                     _Unwind_Stop_Fn stop, void *stop_parameter) {
+                     _Unwind_Exception *exception_object, _Unwind_Stop_Fn stop,
+                     void *stop_parameter) {
   __unw_init_local(cursor, uc);
 
   // uc is initialized by __unw_getcontext in the parent frame. The first stack
@@ -443,7 +444,6 @@ unwind_phase2_forced(unw_context_t *uc, unw_cursor_t *cursor,
   return _URC_FATAL_PHASE2_ERROR;
 }
 
-
 /// Called by __cxa_throw.  Only returns if there is a fatal error.
 _LIBUNWIND_EXPORT _Unwind_Reason_Code
 _Unwind_RaiseException(_Unwind_Exception *exception_object) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/99335