1 //===- X86GOT.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_X86_GOT_H 10 #define MCLD_X86_GOT_H 11 #ifdef ENABLE_UNITTEST 12 #include <gtest.h> 13 #endif 14 15 #include "X86PLT.h" 16 #include <mcld/Target/GOT.h> 17 18 namespace mcld 19 { 20 class LDSection; 21 22 /** \class X86GOT 23 * \brief X86 Global Offset Table. 24 */ 25 26 const unsigned int X86GOT0Num = 3; 27 28 class X86GOT : public GOT 29 { 30 friend void mcld::X86PLT::reserveEntry(size_t pNum); 31 32 friend mcld::PLTEntry* mcld::X86PLT::getPLTEntry( 33 const mcld::ResolveInfo& pSymbol,bool& pExist); 34 35 friend mcld::GOTEntry* mcld::X86PLT::getGOTPLTEntry( 36 const mcld::ResolveInfo& pSymbol,bool& pExist); 37 38 typedef llvm::DenseMap<const ResolveInfo*, GOTEntry*> SymbolIndexMapType; 39 40 public: 41 typedef llvm::MCSectionData::iterator iterator; 42 typedef llvm::MCSectionData::const_iterator const_iterator; 43 44 public: 45 X86GOT(LDSection& pSection, llvm::MCSectionData& pSectionData); 46 47 ~X86GOT(); 48 49 //Reserve general GOT entries. 50 void reserveEntry(size_t pNum = 1); 51 52 GOTEntry* getEntry(const ResolveInfo& pSymbol, bool& pExist); 53 54 void applyGOT0(uint64_t pAddress); 55 56 iterator begin(); 57 58 const_iterator begin() const; 59 60 iterator end(); 61 62 const_iterator end() const; 63 64 unsigned int getGOTPLTNum() const; 65 66 iterator getLastGOT0(); 67 68 const iterator getLastGOT0() const; 69 70 private: 71 72 unsigned int m_GeneralGOTNum; 73 unsigned int m_GOTPLTNum; 74 75 // Used by getGeneralGOTEntry() 76 iterator m_GeneralGOTIterator; 77 78 // Used by getGOTPLTEntry() 79 iterator m_GOTPLTIterator; 80 81 // The last GOT0 entry 82 iterator m_LastGOT0; 83 84 SymbolIndexMapType m_GOTPLTMap; 85 SymbolIndexMapType m_GeneralGOTMap; 86 }; 87 88 } // namespace of mcld 89 90 #endif 91