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 getFormat()31 virtual Triple::ObjectFormatType getFormat() const { return Triple::Wasm; } classof(const MCObjectTargetWriter * W)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 /// @{ is64Bit()41 bool is64Bit() const { return Is64Bit; } isEmscripten()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 58