MCWasmObjectWriter.h

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//===-- llvm/MC/MCWasmObjectWriter.h - Wasm Object Writer -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_MC_MCWASMOBJECTWRITER_H
#define LLVM_MC_MCWASMOBJECTWRITER_H
 
#include "llvm/MC/MCObjectWriter.h"
#include <memory>
 
namespace llvm {
 
class MCFixup;
class MCSectionWasm;
class MCValue;
class raw_pwrite_stream;
 
class MCWasmObjectTargetWriter : public MCObjectTargetWriter {
  const unsigned Is64Bit : 1;
  const unsigned IsEmscripten : 1;
 
protected:
  explicit MCWasmObjectTargetWriter(bool Is64Bit_, bool IsEmscripten);
 
public:
  virtual ~MCWasmObjectTargetWriter();
 
  Triple::ObjectFormatType getFormat() const override { return Triple::Wasm; }
  static bool classof(const MCObjectTargetWriter *W) {
    return W->getFormat() == Triple::Wasm;
  }
 
  virtual unsigned getRelocType(const MCValue &Target, const MCFixup &Fixup,
                                const MCSectionWasm &FixupSection,
                                bool IsLocRel) const = 0;
 
  /// \name Accessors
  /// @{
  bool is64Bit() const { return Is64Bit; }
  bool isEmscripten() const { return IsEmscripten; }
  /// @}
};
 
/// Construct a new Wasm writer instance.
///
/// \param MOTW - The target specific Wasm writer subclass.
/// \param OS - The stream to write to.
/// \returns The constructed object writer.
std::unique_ptr<MCObjectWriter>
createWasmObjectWriter(std::unique_ptr<MCWasmObjectTargetWriter> MOTW,
                       raw_pwrite_stream &OS);
 
std::unique_ptr<MCObjectWriter>
createWasmDwoObjectWriter(std::unique_ptr<MCWasmObjectTargetWriter> MOTW,
                          raw_pwrite_stream &OS, raw_pwrite_stream &DwoOS);
 
} // namespace llvm
 
#endif