//===- OutputSection.h ------------------------------------------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef LLD_MACHO_MERGED_OUTPUT_SECTION_H #define LLD_MACHO_MERGED_OUTPUT_SECTION_H #include "InputSection.h" #include "OutputSection.h" #include "lld/Common/LLVM.h" #include "llvm/ADT/MapVector.h" namespace lld { namespace macho { // Linking multiple files will inevitably mean resolving sections in different // files that are labeled with the same segment and section name. This class // contains all such sections and writes the data from each section sequentially // in the final binary. class MergedOutputSection : public OutputSection { public: MergedOutputSection(StringRef name) : OutputSection(MergedKind, name) {} const InputSection *firstSection() const { return inputs.front(); } const InputSection *lastSection() const { return inputs.back(); } // These accessors will only be valid after finalizing the section uint64_t getSize() const override { return size; } uint64_t getFileSize() const override { return fileSize; } void mergeInput(InputSection *input); void finalize() override; void writeTo(uint8_t *buf) const override; std::vector<InputSection *> inputs; static bool classof(const OutputSection *sec) { return sec->kind() == MergedKind; } private: void mergeFlags(uint32_t inputFlags); size_t size = 0; uint64_t fileSize = 0; }; } // namespace macho } // namespace lld #endif |