136d27ab4d
This patch does the same thing as r365595 to other subdirectories, which completes the naming style change for the entire lld directory. With this, the naming style conversion is complete for lld. Differential Revision: https://reviews.llvm.org/D64473 llvm-svn: 365730
124 lines
3.8 KiB
C++
124 lines
3.8 KiB
C++
//===- OutputSections.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_WASM_OUTPUT_SECTIONS_H
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#define LLD_WASM_OUTPUT_SECTIONS_H
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#include "InputChunks.h"
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#include "WriterUtils.h"
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#include "lld/Common/ErrorHandler.h"
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#include "lld/Common/LLVM.h"
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#include "llvm/ADT/DenseMap.h"
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namespace lld {
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namespace wasm {
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class OutputSection;
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}
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std::string toString(const wasm::OutputSection §ion);
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namespace wasm {
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class OutputSegment;
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class OutputSection {
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public:
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OutputSection(uint32_t type, std::string name = "")
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: type(type), name(name) {}
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virtual ~OutputSection() = default;
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StringRef getSectionName() const;
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void setOffset(size_t newOffset) {
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log("setOffset: " + toString(*this) + ": " + Twine(newOffset));
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offset = newOffset;
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}
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void createHeader(size_t bodySize);
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virtual bool isNeeded() const { return true; }
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virtual size_t getSize() const = 0;
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virtual void writeTo(uint8_t *buf) = 0;
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virtual void finalizeContents() = 0;
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virtual uint32_t getNumRelocations() const { return 0; }
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virtual void writeRelocations(raw_ostream &os) const {}
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std::string header;
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uint32_t type;
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uint32_t sectionIndex = UINT32_MAX;
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std::string name;
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OutputSectionSymbol *sectionSym = nullptr;
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protected:
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size_t offset = 0;
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};
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class CodeSection : public OutputSection {
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public:
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explicit CodeSection(ArrayRef<InputFunction *> functions)
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: OutputSection(llvm::wasm::WASM_SEC_CODE), functions(functions) {}
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size_t getSize() const override { return header.size() + bodySize; }
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void writeTo(uint8_t *buf) override;
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uint32_t getNumRelocations() const override;
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void writeRelocations(raw_ostream &os) const override;
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bool isNeeded() const override { return functions.size() > 0; }
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void finalizeContents() override;
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protected:
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ArrayRef<InputFunction *> functions;
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std::string codeSectionHeader;
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size_t bodySize = 0;
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};
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class DataSection : public OutputSection {
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public:
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explicit DataSection(ArrayRef<OutputSegment *> segments)
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: OutputSection(llvm::wasm::WASM_SEC_DATA), segments(segments) {}
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size_t getSize() const override { return header.size() + bodySize; }
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void writeTo(uint8_t *buf) override;
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uint32_t getNumRelocations() const override;
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void writeRelocations(raw_ostream &os) const override;
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bool isNeeded() const override { return segments.size() > 0; }
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void finalizeContents() override;
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protected:
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ArrayRef<OutputSegment *> segments;
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std::string dataSectionHeader;
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size_t bodySize = 0;
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};
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// Represents a custom section in the output file. Wasm custom sections are
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// used for storing user-defined metadata. Unlike the core sections types
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// they are identified by their string name.
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// The linker combines custom sections that have the same name by simply
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// concatenating them.
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// Note that some custom sections such as "name" and "linking" are handled
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// separately and are instead synthesized by the linker.
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class CustomSection : public OutputSection {
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public:
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CustomSection(std::string name, ArrayRef<InputSection *> inputSections)
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: OutputSection(llvm::wasm::WASM_SEC_CUSTOM, name),
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inputSections(inputSections) {}
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size_t getSize() const override {
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return header.size() + nameData.size() + payloadSize;
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}
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void writeTo(uint8_t *buf) override;
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uint32_t getNumRelocations() const override;
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void writeRelocations(raw_ostream &os) const override;
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void finalizeContents() override;
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protected:
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size_t payloadSize = 0;
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ArrayRef<InputSection *> inputSections;
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std::string nameData;
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};
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} // namespace wasm
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} // namespace lld
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#endif // LLD_WASM_OUTPUT_SECTIONS_H
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