MipsGOT.h revision d0fbbb227051be16931a1aa9b4a7722ac039c698 
1//===- MipsGOT.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_MIPS_GOT_H
10#define MCLD_MIPS_GOT_H
11#ifdef ENABLE_UNITTEST
12#include <gtest.h>
13#endif
14
15#include <llvm/ADT/DenseMap.h>
16
17#include <mcld/Target/GOT.h>
18
19namespace mcld
20{
21class LDSection;
22class MemoryRegion;
23
24/** \class MipsGOTEntry
25 *  \brief GOT Entry with size of 4 bytes
26 */
27class MipsGOTEntry : public GOT::Entry<4>
28{
29public:
30  MipsGOTEntry(uint64_t pContent, SectionData* pParent)
31   : GOT::Entry<4>(pContent, pParent)
32  {}
33};
34
35/** \class MipsGOT
36 *  \brief Mips Global Offset Table.
37 */
38class MipsGOT : public GOT
39{
40public:
41  MipsGOT(LDSection& pSection);
42
43  uint64_t emit(MemoryRegion& pRegion);
44
45  void reserve(size_t pNum = 1);
46  void reserveLocalEntry();
47  void reserveGlobalEntry();
48
49  size_t getTotalNum() const;
50  size_t getLocalNum() const;
51
52  MipsGOTEntry* consume();
53  MipsGOTEntry* consumeLocal();
54  MipsGOTEntry* consumeGlobal();
55
56  void setLocal(const ResolveInfo* pInfo) {
57    m_GOTTypeMap[pInfo] = false;
58  }
59
60  void setGlobal(const ResolveInfo* pInfo) {
61    m_GOTTypeMap[pInfo] = true;
62  }
63
64  bool isLocal(const ResolveInfo* pInfo) {
65    return m_GOTTypeMap[pInfo] == false;
66  }
67
68  bool isGlobal(const ResolveInfo* pInfo) {
69    return m_GOTTypeMap[pInfo] == true;
70  }
71
72  /// hasGOT1 - return if this got section has any GOT1 entry
73  bool hasGOT1() const;
74
75private:
76  typedef llvm::DenseMap<const ResolveInfo*, bool> SymbolTypeMapType;
77
78private:
79  SymbolTypeMapType m_GOTTypeMap;
80
81  iterator m_LocalGOTIterator;  // last local GOT entries
82  iterator m_GlobalGOTIterator; // last global GOT entries
83  size_t m_pLocalNum;
84
85  MipsGOTEntry* m_pLast; ///< the last consumed entry
86};
87
88} // namespace of mcld
89
90#endif
91
92