1//===- OutputSegment.h ------------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLD_WASM_OUTPUT_SEGMENT_H
10#define LLD_WASM_OUTPUT_SEGMENT_H
11
12#include "InputChunks.h"
13#include "lld/Common/ErrorHandler.h"
14#include "llvm/Object/Wasm.h"
15
16namespace lld {
17namespace wasm {
18
19class InputSegment;
20
21class OutputSegment {
22public:
23  OutputSegment(StringRef n) : name(n) {}
24
25  void addInputSegment(InputChunk *inSeg);
26  void finalizeInputSegments();
27  // In most circumstances BSS segments don't need to be written
28  // to the output binary.  However if the memory is imported, and
29  // we can't use memory.fill during startup (due to lack of bulk
30  // memory feature) then we include BSS segments verbatim.
31  bool requiredInBinary() const { return !isBss || config->emitBssSegments; }
32
33  bool isTLS() const { return name == ".tdata"; }
34
35  StringRef name;
36  bool isBss = false;
37  uint32_t index = 0;
38  uint32_t linkingFlags = 0;
39  uint32_t initFlags = 0;
40  uint32_t sectionOffset = 0;
41  uint32_t alignment = 0;
42  uint64_t startVA = 0;
43  std::vector<InputChunk *> inputSegments;
44
45  // Sum of the size of the all the input segments
46  uint32_t size = 0;
47
48  // Segment header
49  std::string header;
50};
51
52} // namespace wasm
53} // namespace lld
54
55#endif // LLD_WASM_OUTPUT_SEGMENT_H
56