ARMPLT.h revision affc150dc44fab1911775a49636d0ce85333b634 
1//===- ARMPLT.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_ARM_PLT_H
10#define MCLD_ARM_PLT_H
11
12#include <mcld/Target/PLT.h>
13
14namespace mcld {
15
16class ARMGOT;
17class GOTEntry;
18class MemoryRegion;
19
20class ARMPLT0 : public PLTEntry {
21public:
22  ARMPLT0(llvm::MCSectionData* pParent);
23};
24
25class ARMPLT1 : public PLTEntry {
26public:
27  ARMPLT1(llvm::MCSectionData* pParent);
28};
29
30/** \class ARMPLT
31 *  \brief ARM Procedure Linkage Table
32 */
33class ARMPLT : public PLT
34{
35  typedef llvm::DenseMap<const ResolveInfo*, ARMPLT1*> SymbolIndexType;
36
37public:
38  typedef llvm::MCSectionData::iterator iterator;
39  typedef llvm::MCSectionData::const_iterator const_iterator;
40
41public:
42  ARMPLT(LDSection& pSection,
43         llvm::MCSectionData& pSectionData,
44         ARMGOT& pGOTPLT);
45  ~ARMPLT();
46
47// Override virtual function.
48public:
49
50  // reserveEntry is ARMGOT friend function.
51  void reserveEntry(size_t pNum = 1) ;
52
53  PLTEntry* getPLTEntry(const ResolveInfo& pSymbol, bool& pExist) ;
54
55  GOTEntry* getGOTPLTEntry(const ResolveInfo& pSymbol, bool& pExist);
56
57public:
58  iterator begin() { return m_SectionData.begin(); }
59
60  const_iterator begin() const { return m_SectionData.begin(); }
61
62  iterator end() { return m_SectionData.end(); }
63
64  const_iterator end() const { return m_SectionData.end(); }
65
66  ARMPLT0* getPLT0() const;
67
68  void applyPLT0();
69
70  void applyPLT1();
71
72  uint64_t emit(MemoryRegion& pRegion);
73
74private:
75  ARMGOT& m_GOT;
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
84} // namespace of mcld
85
86#endif
87
88