1 //===- MipsGOTPLT.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 "MipsGOTPLT.h" 10 11 #include <llvm/Support/Casting.h> 12 13 namespace { 14 typedef mcld::GOT::Entry<4> GOTPLTEntry; 15 16 const size_t MipsGOTPLT0Num = 2; 17 } 18 19 namespace mcld { 20 21 //===----------------------------------------------------------------------===// 22 // MipsGOTPLT 23 //===----------------------------------------------------------------------===// 24 MipsGOTPLT::MipsGOTPLT(LDSection& pSection) : GOT(pSection) { 25 // Create header's entries. 26 new GOTPLTEntry(0, m_SectionData); 27 new GOTPLTEntry(0, m_SectionData); 28 } 29 30 uint64_t MipsGOTPLT::emit(MemoryRegion& pRegion) { 31 uint32_t* buffer = reinterpret_cast<uint32_t*>(pRegion.begin()); 32 33 uint64_t result = 0; 34 for (iterator it = begin(), ie = end(); it != ie; ++it, ++buffer) { 35 GOTPLTEntry* got = &(llvm::cast<GOTPLTEntry>((*it))); 36 *buffer = static_cast<uint32_t>(got->getValue()); 37 result += got->size(); 38 } 39 return result; 40 } 41 42 Fragment* MipsGOTPLT::create() { 43 return new GOTPLTEntry(0, m_SectionData); 44 } 45 46 bool MipsGOTPLT::hasGOT1() const { 47 return m_SectionData->size() > MipsGOTPLT0Num; 48 } 49 50 uint64_t MipsGOTPLT::getEntryAddr(size_t num) const { 51 return addr() + (MipsGOTPLT0Num + num) * GOTPLTEntry::EntrySize; 52 } 53 54 void MipsGOTPLT::applyAllGOTPLT(uint64_t pltAddr) { 55 iterator it = begin(); 56 llvm::cast<GOTPLTEntry>(*it++).setValue(0); // PLT lazy resolver 57 llvm::cast<GOTPLTEntry>(*it++).setValue(0); // Module pointer 58 59 for (; it != end(); ++it) 60 llvm::cast<GOTPLTEntry>(*it).setValue(pltAddr); 61 } 62 63 } // namespace mcld 64
