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1 //===- OutputSegment.h ------------------------------------------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef LLD_WASM_OUTPUT_SEGMENT_H
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10 #define LLD_WASM_OUTPUT_SEGMENT_H
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11
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12 #include "InputChunks.h"
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13 #include "lld/Common/ErrorHandler.h"
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14 #include "llvm/Object/Wasm.h"
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15
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252
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16 namespace lld::wasm {
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17
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18 class InputSegment;
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19
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20 class OutputSegment {
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21 public:
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22 OutputSegment(StringRef n) : name(n) {}
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23
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24 void addInputSegment(InputChunk *inSeg);
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25 void finalizeInputSegments();
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236
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26 // In most circumstances BSS segments don't need to be written
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27 // to the output binary. However if the memory is imported, and
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28 // we can't use memory.fill during startup (due to lack of bulk
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29 // memory feature) then we include BSS segments verbatim.
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30 bool requiredInBinary() const { return !isBss || config->emitBssSegments; }
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31
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32 bool isTLS() const { return name == ".tdata"; }
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33
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34 StringRef name;
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35 bool isBss = false;
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36 uint32_t index = 0;
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221
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37 uint32_t linkingFlags = 0;
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38 uint32_t initFlags = 0;
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39 uint32_t sectionOffset = 0;
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40 uint32_t alignment = 0;
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41 uint64_t startVA = 0;
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42 std::vector<InputChunk *> inputSegments;
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43
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44 // Sum of the size of the all the input segments
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45 uint32_t size = 0;
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46
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47 // Segment header
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48 std::string header;
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49 };
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50
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252
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51 } // namespace lld::wasm
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52
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53 #endif // LLD_WASM_OUTPUT_SEGMENT_H
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