1 //===- MipsRelocator.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 MIPS_RELOCATION_FACTORY_H 10 #define MIPS_RELOCATION_FACTORY_H 11 #ifdef ENABLE_UNITTEST 12 #include <gtest.h> 13 #endif 14 15 #include <mcld/LD/Relocator.h> 16 #include <mcld/Support/GCFactory.h> 17 #include "MipsLDBackend.h" 18 19 namespace mcld { 20 21 /** \class MipsRelocator 22 * \brief MipsRelocator creates and destroys the Mips relocations. 23 */ 24 class MipsRelocator : public Relocator 25 { 26 public: 27 enum ReservedEntryType { 28 None = 0, // no reserved entry 29 ReserveRel = 1, // reserve a dynamic relocation entry 30 ReserveGot = 2, // reserve a GOT entry 31 ReserveGpDisp = 8 // reserve _gp_disp symbol 32 }; 33 34 public: 35 MipsRelocator(MipsGNULDBackend& pParent, const LinkerConfig& pConfig); 36 37 /// scanRelocation - determine the empty entries are needed or not and 38 /// create the empty entries if needed. 39 /// For Mips, the GOT, GP, and dynamic relocation entries are check to create. 40 void scanRelocation(Relocation& pReloc, 41 IRBuilder& pBuilder, 42 Module& pModule, 43 LDSection& pSection); 44 45 /// initializeScan - do initialization before scan relocations in pInput 46 /// @return - return true for initialization success 47 bool initializeScan(Input& pInput); 48 49 /// finalizeScan - do finalization after scan relocations in pInput 50 /// @return - return true for finalization success 51 bool finalizeScan(Input& pInput); 52 53 /// initializeApply - do initialization before apply relocations in pInput 54 /// @return - return true for initialization success 55 bool initializeApply(Input& pInput); 56 57 /// finalizeApply - do finalization after apply relocations in pInput 58 /// @return - return true for finalization success 59 bool finalizeApply(Input& pInput); 60 61 Result applyRelocation(Relocation& pRelocation); 62 getApplyingInput()63 const Input& getApplyingInput() const 64 { return *m_pApplyingInput; } 65 getTarget()66 MipsGNULDBackend& getTarget() 67 { return m_Target; } 68 getTarget()69 const MipsGNULDBackend& getTarget() const 70 { return m_Target; } 71 72 // Get last calculated AHL. getAHL()73 int32_t getAHL() const 74 { return m_AHL; } 75 76 // Set last calculated AHL. setAHL(int32_t pAHL)77 void setAHL(int32_t pAHL) 78 { m_AHL = pAHL; } 79 80 const char* getName(Relocation::Type pType) const; 81 82 Size getSize(Relocation::Type pType) const; 83 84 private: 85 void scanLocalReloc(Relocation& pReloc, 86 IRBuilder& pBuilder, 87 const LDSection& pSection); 88 89 void scanGlobalReloc(Relocation& pReloc, 90 IRBuilder& pBuilder, 91 const LDSection& pSection); 92 93 private: 94 MipsGNULDBackend& m_Target; 95 Input* m_pApplyingInput; 96 int32_t m_AHL; 97 }; 98 99 } // namespace of mcld 100 101 #endif 102