1 //===- MipsELFDynamic.cpp -------------------------------------------------===// 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 #include "MipsELFDynamic.h" 10 11 #include "MipsLDBackend.h" 12 #include <mcld/LD/ELFFileFormat.h> 13 #include <mcld/Target/GNULDBackend.h> 14 15 using namespace mcld; 16 17 // MIPS mandatory dynamic section entries 18 enum { 19 MIPS_RLD_VERSION = 0x70000001, 20 MIPS_FLAGS = 0x70000005, 21 MIPS_BASE_ADDRESS = 0x70000006, 22 MIPS_LOCAL_GOTNO = 0x7000000a, 23 MIPS_SYMTABNO = 0x70000011, 24 MIPS_GOTSYM = 0x70000013 25 }; 26 27 MipsELFDynamic::MipsELFDynamic(const MipsGNULDBackend& pParent, 28 const LinkerConfig& pConfig) 29 : ELFDynamic(pParent, pConfig), 30 m_pParent(pParent) 31 { 32 } 33 34 MipsELFDynamic::~MipsELFDynamic() 35 { 36 } 37 38 void MipsELFDynamic::reserveTargetEntries(const ELFFileFormat& pFormat) 39 { 40 // reservePLTGOT 41 if (pFormat.hasGOT()) 42 reserveOne(llvm::ELF::DT_PLTGOT); 43 44 reserveOne(MIPS_RLD_VERSION); 45 reserveOne(MIPS_FLAGS); 46 reserveOne(MIPS_BASE_ADDRESS); 47 reserveOne(MIPS_LOCAL_GOTNO); 48 reserveOne(MIPS_SYMTABNO); 49 reserveOne(MIPS_GOTSYM); 50 } 51 52 void MipsELFDynamic::applyTargetEntries(const ELFFileFormat& pFormat) 53 { 54 // applyPLTGOT 55 if (pFormat.hasGOT()) 56 applyOne(llvm::ELF::DT_PLTGOT, pFormat.getGOT().addr()); 57 58 applyOne(MIPS_RLD_VERSION, 1); 59 applyOne(MIPS_FLAGS, 0); 60 applyOne(MIPS_BASE_ADDRESS, 0); 61 applyOne(MIPS_LOCAL_GOTNO, getLocalGotNum(pFormat)); 62 applyOne(MIPS_SYMTABNO, getSymTabNum(pFormat)); 63 applyOne(MIPS_GOTSYM, getGotSym(pFormat)); 64 } 65 66 size_t MipsELFDynamic::getSymTabNum(const ELFFileFormat& pFormat) const 67 { 68 if (!pFormat.hasDynSymTab()) 69 return 0; 70 71 const LDSection& dynsym = pFormat.getDynSymTab(); 72 return dynsym.size() / symbolSize(); 73 } 74 75 size_t MipsELFDynamic::getGotSym(const ELFFileFormat& pFormat) const 76 { 77 if (!pFormat.hasGOT()) 78 return 0; 79 80 return getSymTabNum(pFormat) - 81 m_pParent.getGOT().getTotalNum() + 82 m_pParent.getGOT().getLocalNum(); 83 } 84 85 size_t MipsELFDynamic::getLocalGotNum(const ELFFileFormat& pFormat) const 86 { 87 if (!pFormat.hasGOT()) 88 return 0; 89 90 return m_pParent.getGOT().getLocalNum(); 91 } 92
