[Courgette] Initial Implementation of LabelManager.

courgette/assembly_program.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COURGETTE_ASSEMBLY_PROGRAM_H_
 #define COURGETTE_ASSEMBLY_PROGRAM_H_
 
 #include <map>
 #include <set>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 
 #include "courgette/disassembler.h"
+#include "courgette/image_utils.h"
 #include "courgette/memory_allocator.h"
 
 namespace courgette {
 
 class EncodedProgram;
 
-// A Label is a symbolic reference to an address.  Unlike a conventional
-// assembly language, we always know the address.  The address will later be
-// stored in a table and the Label will be replaced with the index into the
-// table.
-//
-// TODO(sra): Make fields private and add setters and getters.
-class Label {
- public:
-  static const int kNoIndex = -1;
-  Label() : rva_(0), index_(kNoIndex), count_(0) {}
-  explicit Label(RVA rva) : rva_(rva), index_(kNoIndex), count_(0) {}
-
-  RVA rva_;    // Address referred to by the label.
-  int index_;  // Index of address in address table, kNoIndex until assigned.
-  int count_;
-};
-
 typedef std::map<RVA, Label*> RVAToLabel;
 
 // Opcodes of simple assembly language
 enum OP {
   ORIGIN,         // ORIGIN <rva> - set current address for assembly.
   MAKEPERELOCS,   // Generates a base relocation table.
   MAKEELFRELOCS,  // Generates a base relocation table.
   DEFBYTE,        // DEFBYTE <value> - emit a byte literal.
   REL32,          // REL32 <label> - emit a rel32 encoded reference to 'label'.
   ABS32,          // ABS32 <label> - emit an abs32 encoded reference to 'label'.
@@ skipping 149 matching lines @@
   // We have separate label spaces for addresses referenced by rel32 labels and
   // abs32 labels.  This is somewhat arbitrary.
   RVAToLabel rel32_labels_;
   RVAToLabel abs32_labels_;
 
   DISALLOW_COPY_AND_ASSIGN(AssemblyProgram);
 };
 
 }  // namespace courgette
 #endif  // COURGETTE_ASSEMBLY_PROGRAM_H_