1 //===- InputSection.cpp ---------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "InputSection.h" 10 #include "OutputSegment.h" 11 #include "Symbols.h" 12 #include "Target.h" 13 #include "lld/Common/Memory.h" 14 #include "llvm/Support/Endian.h" 15 16 using namespace llvm; 17 using namespace llvm::MachO; 18 using namespace llvm::support; 19 using namespace lld; 20 using namespace lld::macho; 21 22 std::vector<InputSection *> macho::inputSections; 23 24 uint64_t InputSection::getFileOffset() const { 25 return parent->fileOff + outSecFileOff; 26 } 27 28 uint64_t InputSection::getVA() const { return parent->addr + outSecOff; } 29 30 void InputSection::writeTo(uint8_t *buf) { 31 if (getFileSize() == 0) 32 return; 33 34 memcpy(buf, data.data(), data.size()); 35 36 for (Reloc &r : relocs) { 37 uint64_t va = 0; 38 if (auto *s = r.target.dyn_cast<Symbol *>()) 39 va = target->getSymbolVA(*s, r.type); 40 else if (auto *isec = r.target.dyn_cast<InputSection *>()) 41 va = isec->getVA(); 42 43 uint64_t val = va + r.addend; 44 if (r.pcrel) 45 val -= getVA() + r.offset; 46 target->relocateOne(buf + r.offset, r, val); 47 } 48 } 49