[libunwind] [libunwind][AArch64] Protect PC within libunwind's context. (PR #113368)

[John Brawn via cfe-commits]

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@@ -1823,9 +1823,48 @@ extern "C" void *__libunwind_cet_get_jump_target() {
 #endif
 
 class _LIBUNWIND_HIDDEN Registers_arm64 {
+protected:
+  /// The program counter is used effectively as a return address
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john-brawn-arm wrote:

"used effectively" should be "effectively used", or just "used".

https://github.com/llvm/llvm-project/pull/113368