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 10 #include <mcld/LD/ELFFileFormat.h> 11 #include <mcld/Target/GNULDBackend.h> 12 #include "MipsELFDynamic.h" 13 #include "MipsLDBackend.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 : ELFDynamic(pParent), 29 m_pParent(pParent) 30 { 31 } 32 33 MipsELFDynamic::~MipsELFDynamic() 34 { 35 } 36 37 void MipsELFDynamic::reserveTargetEntries(const ELFFileFormat& pFormat) 38 { 39 // reservePLTGOT 40 if (pFormat.hasGOT()) 41 reserveOne(llvm::ELF::DT_PLTGOT); 42 43 reserveOne(MIPS_RLD_VERSION); 44 reserveOne(MIPS_FLAGS); 45 reserveOne(MIPS_BASE_ADDRESS); 46 reserveOne(MIPS_LOCAL_GOTNO); 47 reserveOne(MIPS_SYMTABNO); 48 reserveOne(MIPS_GOTSYM); 49 } 50 51 void MipsELFDynamic::applyTargetEntries(const ELFFileFormat& pFormat) 52 { 53 // applyPLTGOT 54 if (pFormat.hasGOT()) 55 applyOne(llvm::ELF::DT_PLTGOT, pFormat.getGOT().addr()); 56 57 applyOne(MIPS_RLD_VERSION, 1); 58 applyOne(MIPS_FLAGS, 0); 59 applyOne(MIPS_BASE_ADDRESS, 0); 60 applyOne(MIPS_LOCAL_GOTNO, getLocalGotNum(pFormat)); 61 applyOne(MIPS_SYMTABNO, getSymTabNum(pFormat)); 62 applyOne(MIPS_GOTSYM, getGotSym(pFormat)); 63 } 64 65 size_t MipsELFDynamic::getSymTabNum(const ELFFileFormat& pFormat) const 66 { 67 if (!pFormat.hasDynSymTab()) 68 return 0; 69 70 const LDSection& dynsym = pFormat.getDynSymTab(); 71 return dynsym.size() / symbolSize(); 72 } 73 74 size_t MipsELFDynamic::getGotSym(const ELFFileFormat& pFormat) const 75 { 76 if (!pFormat.hasGOT()) 77 return 0; 78 79 return getSymTabNum(pFormat) - 80 m_pParent.getGOT().getTotalNum() + 81 m_pParent.getGOT().getLocalNum(); 82 } 83 84 size_t MipsELFDynamic::getLocalGotNum(const ELFFileFormat& pFormat) const 85 { 86 if (!pFormat.hasGOT()) 87 return 0; 88 89 return m_pParent.getGOT().getLocalNum(); 90 } 91
