Fixes to support ARMv5 lego mindstorm.

runtime/vm/assembler_x64.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_X64_H_
 #define VM_ASSEMBLER_X64_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_x64.h directly; use assembler.h instead.
 #endif
@@ skipping 836 matching lines @@
 
   // Instruction pattern from entrypoint is used in dart frame prologues
   // to set up the frame and save a PC which can be used to figure out the
   // RawInstruction object corresponding to the code running in the frame.
   // entrypoint:
   //   pushq rbp          (size is 1 byte)
   //   movq rbp, rsp      (size is 3 bytes)
   //   call L             (size is 5 bytes)
   //   L:
   static const intptr_t kEntryPointToPcMarkerOffset = 9;
+  static intptr_t EntryPointToPcMarkerOffset() {
+    return kEntryPointToPcMarkerOffset;
+  }
 
   void UpdateAllocationStats(intptr_t cid,
                              Heap::Space space = Heap::kNew);
 
   void UpdateAllocationStatsWithSize(intptr_t cid,
                                      Register size_reg,
                                      Heap::Space space = Heap::kNew);
   void UpdateAllocationStatsWithSize(intptr_t cid,
                                      intptr_t instance_size,
                                      Heap::Space space = Heap::kNew);
@@ skipping 244 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_X64_H_