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75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
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//===- InputSegment.h -------------------------------------------*- C++ -*-===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Represents a WebAssembly data segment which can be included as part of
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// an output data segments. Note that in WebAssembly, unlike ELF and other
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// formats, used the term "data segment" to refer to the continous regions of
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// memory that make on the data section. See:
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// https://webassembly.github.io/spec/syntax/modules.html#syntax-data
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//
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// For example, by default, clang will produce a separate data section for
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// each global variable.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_WASM_INPUT_SEGMENT_H
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#define LLD_WASM_INPUT_SEGMENT_H
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#include "lld/Common/ErrorHandler.h"
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#include "llvm/Object/Wasm.h"
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using llvm::object::WasmSegment;
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using llvm::wasm::WasmRelocation;
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namespace lld {
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namespace wasm {
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class ObjFile;
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class OutputSegment;
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class InputSegment {
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public:
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InputSegment(const WasmSegment *Seg, const ObjFile *F)
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: Segment(Seg), File(F) {}
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// Translate an offset in the input segment to an offset in the output
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// segment.
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uint32_t translateVA(uint32_t Address) const;
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const OutputSegment *getOutputSegment() const { return OutputSeg; }
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uint32_t getOutputSegmentOffset() const { return OutputSegmentOffset; }
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uint32_t getInputSectionOffset() const { return Segment->SectionOffset; }
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void setOutputSegment(const OutputSegment *Segment, uint32_t Offset) {
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OutputSeg = Segment;
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OutputSegmentOffset = Offset;
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}
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uint32_t getSize() const { return Segment->Data.Content.size(); }
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uint32_t getAlignment() const { return Segment->Data.Alignment; }
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uint32_t startVA() const { return Segment->Data.Offset.Value.Int32; }
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uint32_t endVA() const { return startVA() + getSize(); }
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StringRef getName() const { return Segment->Data.Name; }
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const WasmSegment *Segment;
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const ObjFile *File;
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std::vector<WasmRelocation> Relocations;
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protected:
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const OutputSegment *OutputSeg = nullptr;
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uint32_t OutputSegmentOffset = 0;
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};
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} // namespace wasm
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} // namespace lld
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#endif // LLD_WASM_INPUT_SEGMENT_H
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