Index: libcfa/src/concurrency/preemption.cfa
===================================================================
--- libcfa/src/concurrency/preemption.cfa	(revision 0190480ad9dd1345c67a816a96d7e00dbe611252)
+++ libcfa/src/concurrency/preemption.cfa	(revision e9b4937917be54873b6978779c9ffe93cc7051ab)
@@ -10,6 +10,6 @@
 // Created On       : Mon Jun 5 14:20:42 2017
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Fri Aug 21 13:45:32 2020
-// Update Count     : 52
+// Last Modified On : Wed Aug 26 16:46:03 2020
+// Update Count     : 53
 //
 
@@ -56,8 +56,10 @@
 #elif defined( __x86_64 )
 #define CFA_REG_IP gregs[REG_RIP]
-#elif defined( __ARM_ARCH )
+#elif defined( __arm__ )
+#define CFA_REG_IP arm_pc
+#elif defined( __aarch64__ )
 #define CFA_REG_IP pc
 #else
-#error unknown hardware architecture
+#error unsupported hardware architecture
 #endif