1 //===- RelocationFactory.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/RelocationFactory.h> 10 #include <mcld/LinkerConfig.h> 11 #include <mcld/Target/TargetLDBackend.h> 12 #include <mcld/Support/MsgHandling.h> 13 14 #include <llvm/Support/Host.h> 15 16 #include <cstring> 17 #include <cassert> 18 19 using namespace mcld; 20 21 //===----------------------------------------------------------------------===// 22 // RelocationFactory 23 //===----------------------------------------------------------------------===// 24 RelocationFactory::RelocationFactory() 25 : GCFactory<Relocation, MCLD_RELOCATIONS_PER_INPUT>(), m_pConfig(NULL) { 26 } 27 28 void RelocationFactory::setConfig(const LinkerConfig& pConfig) 29 { 30 m_pConfig = &pConfig; 31 } 32 33 Relocation* RelocationFactory::produce(RelocationFactory::Type pType, 34 FragmentRef& pFragRef, 35 Address pAddend) 36 { 37 if (NULL == m_pConfig) { 38 fatal(diag::reloc_factory_has_not_config); 39 return NULL; 40 } 41 42 // target_data is the place where the relocation applys to. 43 // Use TargetDataFactory to generate temporary data, and copy the 44 // content of the fragment into this data. 45 DWord target_data = 0; 46 47 // byte swapping if the host and target have different endian 48 if(llvm::sys::isLittleEndianHost() != m_pConfig->targets().isLittleEndian()) { 49 uint32_t tmp_data; 50 51 switch (m_pConfig->targets().bitclass()) { 52 case 32: { 53 pFragRef.memcpy(&tmp_data, 4); 54 tmp_data = mcld::bswap32(tmp_data); 55 target_data = tmp_data; 56 break; 57 } 58 case 64: { 59 pFragRef.memcpy(&target_data, 8); 60 target_data = mcld::bswap64(target_data); 61 break; 62 } 63 default: { 64 fatal(diag::unsupported_bitclass) << m_pConfig->targets().triple().str() 65 << m_pConfig->targets().bitclass(); 66 return NULL; 67 } 68 } // end of switch 69 } 70 else { 71 pFragRef.memcpy(&target_data, (m_pConfig->targets().bitclass()/8)); 72 } 73 74 Relocation* result = allocate(); 75 new (result) Relocation(pType, &pFragRef, pAddend, target_data); 76 return result; 77 } 78 79 Relocation* RelocationFactory::produceEmptyEntry() 80 { 81 Relocation* result = allocate(); 82 new (result) Relocation(0, 0, 0, 0); 83 return result; 84 } 85 86 void RelocationFactory::destroy(Relocation* pRelocation) 87 { 88 /** GCFactory will recycle the relocation **/ 89 } 90 91
