[libunwind] [libunwind] [SEH] Set NonVolatileRegisters before calling a personality function (PR #137951)

[Martin Storsjö via cfe-commits]

================
@@ -212,6 +212,11 @@ __libunwind_seh_personality(int version, _Unwind_Action 
state,
   ms_exc.ExceptionInformation[2] = state;
   DISPATCHER_CONTEXT *disp_ctx =
       __unw_seh_get_disp_ctx((unw_cursor_t *)context);
+#if defined(__aarch64__)
+  disp_ctx->NonVolatileRegisters = (PBYTE)&disp_ctx->ContextRecord->X19;
----------------
mstorsjo wrote:

Thanks; I implemented this now.

https://github.com/llvm/llvm-project/pull/137951
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