Second codegen test passing on ARM (simulated).

runtime/vm/stack_frame_x64.cc

Index: runtime/vm/stack_frame_x64.cc
===================================================================
--- runtime/vm/stack_frame_x64.cc	(revision 19404)
+++ runtime/vm/stack_frame_x64.cc	(working copy)
@@ -16,6 +16,7 @@
 static const int kSavedContextOffsetInEntryFrame = -9 * kWordSize;
 static const int kExitLinkOffsetInEntryFrame = -8 * kWordSize;
 static const int kPcAddressOffsetFromSp = -1 * kWordSize;
+static const int kEntrypointMarkerOffsetFromFp = -1 * kWordSize;
 static const int kSpOffsetFromPreviousFp = 2 * kWordSize;
 
 
@@ -24,6 +25,11 @@
 }
 
 
+intptr_t StackFrame::EntrypointMarkerOffsetFromFp() {
+  return kEntrypointMarkerOffsetFromFp;
+}
+
+
 uword StackFrame::GetCallerSp() const {
   return fp() + kSpOffsetFromPreviousFp;
 }