Adds Stop to MIPS. Starts on MIPS call patcher.

runtime/vm/constants_mips.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_CONSTANTS_MIPS_H_
 #define VM_CONSTANTS_MIPS_H_
 
 namespace dart {
 
 enum Register {
@@ skipping 154 matching lines @@
   kRdShift = 11,
   kRdBits = 5,
   kSaShift = 6,
   kSaBits = 5,
   kFunctionShift = 0,
   kFunctionBits = 6,
   kImmShift = 0,
   kImmBits = 16,
   kInstrShift = 0,
   kInstrBits = 26,
-  kBreakCodeShift = 5,
+  kBreakCodeShift = 6,
   kBreakCodeBits = 20,
 
   kBranchOffsetMask = 0x0000ffff,
 };
 
 
 enum Opcode {
   SPECIAL = 0,
   REGIMM = 1,
   J = 2,
@@ skipping 116 matching lines @@
 
 class Instr {
  public:
   enum {
     kInstrSize = 4,
   };
 
   static const int32_t kBreakPointInstruction =
       (SPECIAL << kOpcodeShift) | (BREAK << kFunctionShift);
   static const int32_t kNopInstruction = 0;
+  static const int32_t kStopMessageCode = 1;
 
   // Get the raw instruction bits.
   inline int32_t InstructionBits() const {
     return *reinterpret_cast<const int32_t*>(this);
   }
 
   // Set the raw instruction bits to value.
   inline void SetInstructionBits(int32_t value) {
     *reinterpret_cast<int32_t*>(this) = value;
   }
@@ skipping 61 matching lines @@
   static Instr* At(uword pc) { return reinterpret_cast<Instr*>(pc); }
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_MIPS_H_