Change constant pool marker to be the unconditional, permanently undefined instruction.

src/arm/disasm-arm.cc

 // 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 1370 matching lines @@
 
 bool Decoder::IsConstantPoolAt(byte* instr_ptr) {
   int instruction_bits = *(reinterpret_cast<int*>(instr_ptr));
   return (instruction_bits & kConstantPoolMarkerMask) == kConstantPoolMarker;
 }
 
 
 int Decoder::ConstantPoolSizeAt(byte* instr_ptr) {
   if (IsConstantPoolAt(instr_ptr)) {
     int instruction_bits = *(reinterpret_cast<int*>(instr_ptr));
-    return instruction_bits & kConstantPoolLengthMask;
+    return DecodeConstantPoolLength(instruction_bits);
   } else {
     return -1;
   }
 }
 
 
 // Disassemble the instruction at *instr_ptr into the output buffer.
 int Decoder::InstructionDecode(byte* instr_ptr) {
   Instruction* instr = Instruction::At(instr_ptr);
   // Print raw instruction bytes.
   out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_,
                                   "%08x       ",
                                   instr->InstructionBits());
   if (instr->ConditionField() == kSpecialCondition) {
     Unknown(instr);
     return Instruction::kInstrSize;
   }
   int instruction_bits = *(reinterpret_cast<int*>(instr_ptr));
   if ((instruction_bits & kConstantPoolMarkerMask) == kConstantPoolMarker) {
     out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_,
                                     "constant pool begin (length %d)",
-                                    instruction_bits &
-                                    kConstantPoolLengthMask);
+                                    DecodeConstantPoolLength(instruction_bits));
     return Instruction::kInstrSize;
   }
   switch (instr->TypeValue()) {
     case 0:
     case 1: {
       DecodeType01(instr);
       break;
     }
     case 2: {
       DecodeType2(instr);
@@ skipping 103 matching lines @@
     pc += d.InstructionDecode(buffer, pc);
     fprintf(f, "%p    %08x      %s\n",
             prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer.start());
   }
 }
 
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_ARM