MCWasmObjectWriter.h revision 360784 
1//===-- llvm/MC/MCWasmObjectWriter.h - Wasm Object Writer -------*- 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 LLVM_MC_MCWASMOBJECTWRITER_H
10#define LLVM_MC_MCWASMOBJECTWRITER_H
11
12#include "llvm/MC/MCObjectWriter.h"
13#include <memory>
14
15namespace llvm {
16
17class MCFixup;
18class MCValue;
19class raw_pwrite_stream;
20
21class MCWasmObjectTargetWriter : public MCObjectTargetWriter {
22  const unsigned Is64Bit : 1;
23  const unsigned IsEmscripten : 1;
24
25protected:
26  explicit MCWasmObjectTargetWriter(bool Is64Bit_, bool IsEmscripten);
27
28public:
29  virtual ~MCWasmObjectTargetWriter();
30
31  virtual Triple::ObjectFormatType getFormat() const { return Triple::Wasm; }
32  static bool classof(const MCObjectTargetWriter *W) {
33    return W->getFormat() == Triple::Wasm;
34  }
35
36  virtual unsigned getRelocType(const MCValue &Target,
37                                const MCFixup &Fixup) const = 0;
38
39  /// \name Accessors
40  /// @{
41  bool is64Bit() const { return Is64Bit; }
42  bool isEmscripten() const { return IsEmscripten; }
43  /// @}
44};
45
46/// Construct a new Wasm writer instance.
47///
48/// \param MOTW - The target specific Wasm writer subclass.
49/// \param OS - The stream to write to.
50/// \returns The constructed object writer.
51std::unique_ptr<MCObjectWriter>
52createWasmObjectWriter(std::unique_ptr<MCWasmObjectTargetWriter> MOTW,
53                       raw_pwrite_stream &OS);
54
55} // namespace llvm
56
57#endif
58