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