55e9eb416e
The order file indicates how input sections should be sorted within each output section, based on the symbols contained within those sections. This diff sets the stage for implementing and testing `.subsections_via_symbols`, where we will break up InputSections by each symbol and sort them more granularly. Reviewed By: smeenai Differential Revision: https://reviews.llvm.org/D79668
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
//===- OutputSection.h ------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_MACHO_MERGED_OUTPUT_SECTION_H
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#define LLD_MACHO_MERGED_OUTPUT_SECTION_H
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#include "InputSection.h"
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#include "OutputSection.h"
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#include "lld/Common/LLVM.h"
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namespace lld {
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namespace macho {
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// Linking multiple files will inevitably mean resolving sections in different
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// files that are labeled with the same segment and section name. This class
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// contains all such sections and writes the data from each section sequentially
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// in the final binary.
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class MergedOutputSection : public OutputSection {
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public:
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MergedOutputSection(StringRef name) : OutputSection(MergedKind, name) {}
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const InputSection *firstSection() const { return inputs.front(); }
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const InputSection *lastSection() const { return inputs.back(); }
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// These accessors will only be valid after finalizing the section
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size_t getSize() const override { return size; }
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uint64_t getFileSize() const override { return fileSize; }
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void mergeInput(InputSection *input) override;
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void finalize() override;
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void writeTo(uint8_t *buf) const override;
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std::vector<InputSection *> inputs;
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static bool classof(const OutputSection *sec) {
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return sec->kind() == MergedKind;
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}
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private:
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void mergeFlags(uint32_t inputFlags);
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size_t size = 0;
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uint64_t fileSize = 0;
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};
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} // namespace macho
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} // namespace lld
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#endif
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