Apply bit mask if ptrauth_strip is not available

Source/PLCrashAsyncThread_arm.c

@@ -77,7 +77,16 @@
 
 #else // __has_feature(ptrauth_calls)
 
-#define THREAD_STATE_GET_PTR(name, type, ts) arm_thread_state64_get_ ## name (ts->arm_state. type)
+/*
+ * Even if pointer authentication is not available at the compile time, the binary still can be used in an environment with PAC.
+ * In this case, we can apply bitmask as a workaround.
+ */
+#define ARM64_PTR_MASK 0x0000000FFFFFFFFF
+
+#define THREAD_STATE_GET_PTR(name, type, ts) ({ \
+    plcrash_greg_t ptr = arm_thread_state64_get_ ## name (ts->arm_state. type); \
+    (ptr & ARM64_PTR_MASK); \
+})
 #define THREAD_STATE_GET_FPTR(name, type, ts) THREAD_STATE_GET_PTR(name ## _fptr, type, ts)
 
 #define THREAD_STATE_SET_PTR(name, type, ts, regnum, value) { \