include/llvm/MC/MCWasmObjectWriter.h

   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
  15 namespace llvm {
  16
  17 class MCFixup;
  18 class MCValue;
  19 class raw_pwrite_stream;
  20
  21 class MCWasmObjectTargetWriter : public MCObjectTargetWriter {
  22   const unsigned Is64Bit : 1;
  23   const unsigned IsEmscripten : 1;
  24
  25 protected:
  26   explicit MCWasmObjectTargetWriter(bool Is64Bit_, bool IsEmscripten);
  27
  28 public:
  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.
  51 std::unique_ptr<MCObjectWriter>
  52 createWasmObjectWriter(std::unique_ptr<MCWasmObjectTargetWriter> MOTW,
  53                        raw_pwrite_stream &OS);
  54
  55 } // namespace llvm
  56
  57 #endif