Index: arch/amd64/src/dummy.s
===================================================================
--- arch/amd64/src/dummy.s	(revision 1141c1acbca81894d031f82ef77daf4f75d1b87a)
+++ arch/amd64/src/dummy.s	(revision fde642915e1f68d137df99e51a40e19c02838fed)
@@ -29,4 +29,5 @@
 .text
 
+.global memcopy
 .global cpu_priority_high
 .global cpu_priority_low
@@ -54,4 +55,5 @@
 .global dummy
 
+memcopy:
 cpu_priority_high:
 cpu_priority_low: