/// emitRelocation void ELFObjectWriter::emitRelocation(const LinkerConfig& pConfig, const LDSection& pSection, MemoryRegion& pRegion) const { const RelocData* sect_data = pSection.getRelocData(); assert(NULL != sect_data && "SectionData is NULL in emitRelocation!"); if (pSection.type() == SHT_REL) { if (pConfig.targets().is32Bits()) emitRel<32>(pConfig, *sect_data, pRegion); else if (pConfig.targets().is64Bits()) emitRel<64>(pConfig, *sect_data, pRegion); else { fatal(diag::unsupported_bitclass) << pConfig.targets().triple().str() << pConfig.targets().bitclass(); } } else if (pSection.type() == SHT_RELA) { if (pConfig.targets().is32Bits()) emitRela<32>(pConfig, *sect_data, pRegion); else if (pConfig.targets().is64Bits()) emitRela<64>(pConfig, *sect_data, pRegion); else { fatal(diag::unsupported_bitclass) << pConfig.targets().triple().str() << pConfig.targets().bitclass(); } } else llvm::report_fatal_error("unsupported relocation section type!"); }
bool MipsGNULDBackend::doRelax(Module& pModule, IRBuilder& pBuilder, bool& pFinished) { assert(getStubFactory() != NULL && getBRIslandFactory() != NULL); bool isRelaxed = false; for (Module::obj_iterator input = pModule.obj_begin(); input != pModule.obj_end(); ++input) { LDContext* context = (*input)->context(); for (LDContext::sect_iterator rs = context->relocSectBegin(); rs != context->relocSectEnd(); ++rs) { LDSection* sec = *rs; if (LDFileFormat::Ignore == sec->kind() || !sec->hasRelocData()) continue; for (RelocData::iterator reloc = sec->getRelocData()->begin(); reloc != sec->getRelocData()->end(); ++reloc) { if (llvm::ELF::R_MIPS_26 != reloc->type()) continue; if (relaxRelocation(pBuilder, *llvm::cast<Relocation>(reloc))) isRelaxed = true; } } } SectionData* textData = getOutputFormat()->getText().getSectionData(); // find the first fragment w/ invalid offset due to stub insertion Fragment* invalid = NULL; pFinished = true; for (BranchIslandFactory::iterator ii = getBRIslandFactory()->begin(), ie = getBRIslandFactory()->end(); ii != ie; ++ii) { BranchIsland& island = *ii; if (island.end() == textData->end()) break; Fragment* exit = island.end(); if ((island.offset() + island.size()) > exit->getOffset()) { invalid = exit; pFinished = false; break; } } // reset the offset of invalid fragments while (invalid != NULL) { invalid->setOffset(invalid->getPrevNode()->getOffset() + invalid->getPrevNode()->size()); invalid = invalid->getNextNode(); } // reset the size of .text if (isRelaxed) getOutputFormat()->getText().setSize(textData->back().getOffset() + textData->back().size()); return isRelaxed; }