PLT.h revision 22add6ff3426df1a85089fe6a6e1597ee3b6f300 
1//===- PLT.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 MCLD_PROCEDURE_LINKAGE_TABLE_H
10#define MCLD_PROCEDURE_LINKAGE_TABLE_H
11#ifdef ENABLE_UNITTEST
12#include <gtest.h>
13#endif
14
15#include <mcld/LD/LDSection.h>
16#include <mcld/LD/SectionData.h>
17#include <mcld/Fragment/TargetFragment.h>
18
19namespace mcld {
20
21class LDSection;
22class ResolveInfo;
23
24/** \class PLT
25 *  \brief Procedure linkage table
26 */
27class PLT
28{
29public:
30  typedef SectionData::iterator iterator;
31  typedef SectionData::const_iterator const_iterator;
32
33  class Entry : public TargetFragment
34  {
35  public:
36    Entry(size_t pSize, SectionData& pParent);
37    virtual ~Entry();
38
39    size_t getEntrySize() const
40    { return m_EntrySize; }
41
42    void setContent(unsigned char* pContent)
43    { m_pContent = pContent; }
44
45    const unsigned char* getContent() const
46    { return m_pContent; }
47
48    //Used by llvm::cast<>.
49    static bool classof(const Fragment *O)
50    { return true; }
51
52    size_t size() const
53    { return m_EntrySize; }
54
55  protected:
56    size_t m_EntrySize;
57    unsigned char* m_pContent;
58  };
59
60public:
61  PLT(LDSection& pSection);
62
63  virtual ~PLT();
64
65  /// reserveEntry - reseve the number of pNum of empty entries
66  /// The empty entris are reserved for layout to adjust the fragment offset.
67  virtual void reserveEntry(size_t pNum = 1) = 0;
68
69  // finalizeSectionSize - set LDSection size
70  virtual void finalizeSectionSize() = 0;
71
72  uint64_t addr() const { return m_Section.addr(); }
73
74  const_iterator begin() const { return m_SectionData->begin(); }
75  iterator       begin()       { return m_SectionData->begin(); }
76  const_iterator end  () const { return m_SectionData->end();   }
77  iterator       end  ()       { return m_SectionData->end();   }
78
79protected:
80  LDSection& m_Section;
81  SectionData* m_SectionData;
82};
83
84} // namespace of mcld
85
86#endif
87
88