X86PLT.h revision affc150dc44fab1911775a49636d0ce85333b634 
1//===- X86PLT.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 X86_PLT_H
10#define X86_PLT_H
11
12#include <mcld/Target/PLT.h>
13
14namespace mcld {
15
16class X86GOTPLT;
17class GOTEntry;
18class Output;
19
20class X86PLT0 : public PLTEntry {
21public:
22  X86PLT0(llvm::MCSectionData* pParent, unsigned int pSize);
23};
24
25class X86PLT1 : public PLTEntry {
26public:
27  X86PLT1(llvm::MCSectionData* pParent, unsigned int pSize);
28};
29
30/** \class X86PLT
31 *  \brief X86 Procedure Linkage Table
32 */
33class X86PLT : public PLT
34{
35  typedef llvm::DenseMap<const ResolveInfo*, X86PLT1*> SymbolIndexType;
36
37public:
38  typedef llvm::MCSectionData::iterator iterator;
39  typedef llvm::MCSectionData::const_iterator const_iterator;
40
41public:
42  X86PLT(LDSection& pSection,
43         llvm::MCSectionData& pSectionData,
44         X86GOTPLT& pGOTPLT,
45         const Output& pOutput);
46  ~X86PLT();
47
48// Override virtual function.
49public:
50
51  // reserveEntry is X86GOT friend function.
52  void reserveEntry(size_t pNum = 1) ;
53
54  PLTEntry* getPLTEntry(const ResolveInfo& pSymbol, bool& pExist) ;
55
56  GOTEntry* getGOTPLTEntry(const ResolveInfo& pSymbol, bool& pExist);
57
58public:
59
60  iterator begin() { return m_SectionData.begin(); }
61
62  const_iterator begin() const { return m_SectionData.begin(); }
63
64  iterator end() { return m_SectionData.end(); }
65
66  const_iterator end() const { return m_SectionData.end(); }
67
68  X86PLT0* getPLT0() const;
69
70  void applyPLT0();
71
72  void applyPLT1();
73
74private:
75  X86GOTPLT& m_GOTPLT;
76
77  // Used by getEntry() for mapping a ResolveInfo
78  // instance to a PLT1 Entry.
79  iterator m_PLTEntryIterator;
80
81  SymbolIndexType m_PLTEntryMap;
82
83  const uint8_t *m_PLT0;
84  const uint8_t *m_PLT1;
85  unsigned int m_PLT0Size;
86  unsigned int m_PLT1Size;
87
88  const Output& m_Output;
89};
90
91} // namespace of mcld
92
93#endif
94