1 //===- SectionSymbolSet.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/LD/SectionSymbolSet.h" 10 11 #include "mcld/Fragment/FragmentRef.h" 12 #include "mcld/LD/EhFrame.h" 13 #include "mcld/LD/LDFileFormat.h" 14 #include "mcld/LD/LDSection.h" 15 #include "mcld/LD/LDSymbol.h" 16 #include "mcld/LD/NamePool.h" 17 #include "mcld/LD/RelocData.h" 18 #include "mcld/LD/ResolveInfo.h" 19 #include "mcld/LD/SectionData.h" 20 21 namespace mcld { 22 23 //===----------------------------------------------------------------------===// 24 // SectionSymbolSet 25 //===----------------------------------------------------------------------===// 26 27 SectionSymbolSet::SectionSymbolSet() { 28 m_pSectionSymbolMap = new SectHashTableType(16); 29 } 30 31 SectionSymbolSet::~SectionSymbolSet() { 32 delete m_pSectionSymbolMap; 33 } 34 35 bool SectionSymbolSet::add(LDSection& pOutSect, NamePool& pNamePool) { 36 // create the resolveInfo for this section symbol 37 llvm::StringRef sym_name = llvm::StringRef(pOutSect.name()); 38 ResolveInfo* sym_info = pNamePool.createSymbol(sym_name, 39 false, 40 ResolveInfo::Section, 41 ResolveInfo::Define, 42 ResolveInfo::Local, 43 0x0, // size 44 ResolveInfo::Default); 45 46 // create the output section symbol and set its fragRef to the first fragment 47 // of the section 48 LDSymbol* sym = LDSymbol::Create(*sym_info); 49 sym_info->setSymPtr(sym); 50 51 // insert the symbol to the Section to Symbol hash map 52 bool exist = false; 53 SectHashTableType::entry_type* entry = 54 m_pSectionSymbolMap->insert(&pOutSect, exist); 55 assert(!exist); 56 entry->setValue(sym); 57 58 return true; 59 } 60 61 bool SectionSymbolSet::finalize(LDSection& pOutSect, 62 SymbolTable& pSymTab, 63 bool relocatable) { 64 if (!relocatable && pOutSect.size() == 0) 65 return true; 66 67 LDSymbol* sym = get(pOutSect); 68 assert(sym != NULL); 69 SectionData* data = NULL; 70 switch (pOutSect.kind()) { 71 case LDFileFormat::Relocation: 72 // Relocation section should not have section symbol. 73 return true; 74 75 case LDFileFormat::EhFrame: 76 if (EhFrame* ehframe = pOutSect.getEhFrame()) 77 data = ehframe->getSectionData(); 78 break; 79 80 default: 81 data = pOutSect.getSectionData(); 82 break; 83 } 84 FragmentRef* frag_ref; 85 if (data && !data->empty()) 86 frag_ref = FragmentRef::Create(data->front(), 0x0); 87 else 88 frag_ref = FragmentRef::Null(); 89 sym->setFragmentRef(frag_ref); 90 // push symbol into output symbol table 91 pSymTab.add(*sym); 92 93 return true; 94 } 95 96 LDSymbol* SectionSymbolSet::get(const LDSection& pOutSect) { 97 SectHashTableType::iterator entry = m_pSectionSymbolMap->find(&pOutSect); 98 return entry.getEntry()->value(); 99 } 100 101 const LDSymbol* SectionSymbolSet::get(const LDSection& pOutSect) const { 102 SectHashTableType::iterator entry = m_pSectionSymbolMap->find(&pOutSect); 103 return entry.getEntry()->value(); 104 } 105 106 } // namespace mcld 107
