Index: uspace/lib/c/arch/arm32/src/syscall.c
===================================================================
--- uspace/lib/c/arch/arm32/src/syscall.c	(revision 09ab0a9afc9379f1604c0fd75cac2d9287ba022c)
+++ uspace/lib/c/arch/arm32/src/syscall.c	(revision bc73be3215c832cdb0c8a5022db800902f9f62dc)
@@ -70,4 +70,10 @@
 	      "r" (__arm_reg_r5),
 	      "r" (__arm_reg_r6)
+	    :
+	      /*
+	       * Clobber memory too as some arguments might be
+	       * actually pointers.
+	       */
+	      "memory"
 	);