Avoid trying to decode the raw inline constant which is part of the aged code prologue.

src/arm/constants-arm.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 32 matching lines @@
 const int kConstantPoolLengthMaxMask = 0xffff;
 inline int EncodeConstantPoolLength(int length) {
   ASSERT((length & kConstantPoolLengthMaxMask) == length);
   return ((length & 0xfff0) << 4) | (length & 0xf);
 }
 inline int DecodeConstantPoolLength(int instr) {
   ASSERT((instr & kConstantPoolMarkerMask) == kConstantPoolMarker);
   return ((instr >> 4) & 0xfff0) | (instr & 0xf);
 }
 
+// Used in code age prologue - ldr(pc, MemOperand(pc, -4))
+const int kCodeAgeJumpInstruction = 0xe51ff004;
+
 // Number of registers in normal ARM mode.
 const int kNumRegisters = 16;
 
 // VFP support.
 const int kNumVFPSingleRegisters = 32;
 const int kNumVFPDoubleRegisters = 32;
 const int kNumVFPRegisters = kNumVFPSingleRegisters + kNumVFPDoubleRegisters;
 
 // PC is register 15.
 const int kPCRegister = 15;
@@ skipping 698 matching lines @@
   static int Number(const char* name, bool* is_double);
 
  private:
   static const char* names_[kNumVFPRegisters];
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CONSTANTS_ARM_H_