1 //===- OutputRelocSection.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 <mcld/Target/OutputRelocSection.h> 10 11 #include <mcld/LD/LDSection.h> 12 #include <mcld/LD/RelocationFactory.h> 13 #include <mcld/Module.h> 14 #include <mcld/Support/MsgHandling.h> 15 #include <mcld/IRBuilder.h> 16 17 #include <llvm/Support/Casting.h> 18 19 using namespace mcld; 20 21 //===----------------------------------------------------------------------===// 22 // OutputRelocSection 23 //===----------------------------------------------------------------------===// 24 OutputRelocSection::OutputRelocSection(Module& pModule, LDSection& pSection) 25 : m_Module(pModule), 26 m_pRelocData(NULL), 27 m_isVisit(false), 28 m_ValidEntryIterator(){ 29 assert(!pSection.hasRelocData() && "Given section is not a relocation section"); 30 m_pRelocData = IRBuilder::CreateRelocData(pSection); 31 } 32 33 OutputRelocSection::~OutputRelocSection() 34 { 35 } 36 37 Relocation* OutputRelocSection::create() 38 { 39 Relocation* reloc = Relocation::Create(); 40 m_pRelocData->append(*reloc); 41 return reloc; 42 } 43 44 void OutputRelocSection::reserveEntry(size_t pNum) 45 { 46 for(size_t i=0; i<pNum; i++) 47 m_pRelocData->append(*Relocation::Create()); 48 } 49 50 Relocation* OutputRelocSection::consumeEntry() 51 { 52 // first time visit this function, set m_ValidEntryIterator to 53 // Fragments.begin() 54 if(!m_isVisit) { 55 assert(!m_pRelocData->getRelocationList().empty() && 56 "DynRelSection contains no entries."); 57 m_ValidEntryIterator = m_pRelocData->begin(); 58 m_isVisit = true; 59 } 60 else { 61 // Add m_ValidEntryIterator here instead of at the end of this function. 62 // We may reserve an entry and then consume it immediately, e.g. for COPY 63 // relocation, so we need to avoid setting this iterator to 64 // RelocData->end() in any case, or when reserve and consume again, 65 // ++m_ValidEntryIterator will still be RelocData->end(). 66 ++m_ValidEntryIterator; 67 } 68 assert(m_ValidEntryIterator != m_pRelocData->end() && 69 "No empty relocation entry for the incoming symbol."); 70 71 return &(*m_ValidEntryIterator); 72 } 73 74 size_t OutputRelocSection::numOfRelocs() 75 { 76 return m_pRelocData->size(); 77 } 78 79 bool OutputRelocSection::addSymbolToDynSym(LDSymbol& pSymbol) 80 { 81 m_Module.getSymbolTable().changeToDynamic(pSymbol); 82 return true; 83 } 84 85
