OutputRelocSection.h revision 5460a1f25d9ddecb5c70667267d66d51af177a99 
1//===- OutputRelocSection.h --------------------------------------------------===//
2//
3//                     The MCLinker Project
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9#ifndef OUTPUTRELOCSECTION_H
10#define OUTPUTRELOCSECTION_H
11#ifdef ENABLE_UNITTEST
12#include <gtest.h>
13#endif
14
15#include <llvm/MC/MCAssembler.h>
16#include <llvm/ADT/DenseMap.h>
17#include <mcld/LD/RelocationFactory.h>
18
19namespace mcld
20{
21
22class ResolveInfo;
23class Relocation;
24
25/** \class OutputRelocSection
26 *  \brief Dynamic relocation section for ARM .rel.dyn and .rel.plt
27 */
28class OutputRelocSection
29{
30public:
31  typedef llvm::DenseMap<const ResolveInfo*, Relocation*> SymRelMapType;
32  typedef SymRelMapType::iterator SymRelMapIterator;
33
34  typedef llvm::MCSectionData::iterator MCFragmentIterator;
35
36public:
37  OutputRelocSection(LDSection& pSection,
38                   llvm::MCSectionData& pSectionData,
39                   unsigned int pEntrySize);
40  ~OutputRelocSection();
41
42  void reserveEntry(RelocationFactory& pRelFactory, size_t pNum=1);
43
44  Relocation* getEntry(const ResolveInfo& pSymbol,
45                       bool isForGOT,
46                       bool& pExist);
47
48private:
49  /// m_pSection - LDSection of this Section
50  LDSection* m_pSection;
51
52  /// m_SectionData - MCSectionData which contains the dynamic relocations
53  llvm::MCSectionData* m_pSectionData;
54
55  /// m_EntryBytes - size of a relocation entry
56  unsigned int m_EntryBytes;
57
58  /// m_isVisit - First time visit the function getEntry() or not
59  bool m_isVisit ;
60
61  /// m_ValidEntryIterator - point to the first valid entry
62  MCFragmentIterator m_ValidEntryIterator;
63
64  /// m_SymRelMap - map the resolved symbol to the Relocation entry
65  SymRelMapType m_SymRelMap;
66};
67
68} // namespace of mcld
69
70#endif
71
72