| //===- 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 |