Fix auth of personality pointer

Author: kovdan01

libunwind/src/DwarfParser.hpp

@@ -405,10 +405,17 @@ const char *CFI_Parser<A>::parseCIE(A &addressSpace, pint_t cie,
           // schema. If we could guarantee the encoding of the personality we
           // could avoid this by simply giving resultAddr the correct ptrauth
           // schema and performing an assignment.
+#ifdef __APPLE__
+          const auto oldDiscriminator = resultAddr;
+#else
+          const auto oldDiscriminator = ptrauth_blend_discriminator(
+              (void*)resultAddr,
+              ptrauth_string_discriminator("personality"));
+#endif
           const auto discriminator = ptrauth_blend_discriminator(
               &cieInfo->personality, __ptrauth_unwind_cie_info_personality_disc);
           void *signedPtr = ptrauth_auth_and_resign(
-              (void *)personality, ptrauth_key_function_pointer, resultAddr,
+              (void *)personality, ptrauth_key_function_pointer, oldDiscriminator,
               ptrauth_key_function_pointer, discriminator);
           personality = (pint_t)signedPtr;
         }