llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldCOFF.h

   1 //===-- RuntimeDyldCOFF.h - Run-time dynamic linker for MC-JIT ---*- 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 // COFF support for MC-JIT runtime dynamic linker.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_RUNTIME_DYLD_COFF_H
  14 #define LLVM_RUNTIME_DYLD_COFF_H
  15
  16 #include "RuntimeDyldImpl.h"
  17
  18 #define DEBUG_TYPE "dyld"
  19
  20 using namespace llvm;
  21
  22 namespace llvm {
  23
  24 // Common base class for COFF dynamic linker support.
  25 // Concrete subclasses for each target can be found in ./Targets.
  26 class RuntimeDyldCOFF : public RuntimeDyldImpl {
  27
  28 public:
  29   std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
  30   loadObject(const object::ObjectFile &Obj) override;
  31   bool isCompatibleFile(const object::ObjectFile &Obj) const override;
  32
  33   static std::unique_ptr<RuntimeDyldCOFF>
  34   create(Triple::ArchType Arch, RuntimeDyld::MemoryManager &MemMgr,
  35          JITSymbolResolver &Resolver);
  36
  37 protected:
  38   RuntimeDyldCOFF(RuntimeDyld::MemoryManager &MemMgr,
  39                   JITSymbolResolver &Resolver, unsigned PointerSize,
  40                   uint32_t PointerReloc)
  41       : RuntimeDyldImpl(MemMgr, Resolver), PointerSize(PointerSize),
  42         PointerReloc(PointerReloc) {
  43     assert((PointerSize == 4 || PointerSize == 8) && "Unexpected pointer size");
  44   }
  45
  46   uint64_t getSymbolOffset(const SymbolRef &Sym);
  47   uint64_t getDLLImportOffset(unsigned SectionID, StubMap &Stubs,
  48                               StringRef Name, bool SetSectionIDMinus1 = false);
  49
  50   static constexpr StringRef getImportSymbolPrefix() { return "__imp_"; }
  51
  52 private:
  53   unsigned PointerSize;
  54   uint32_t PointerReloc;
  55 };
  56
  57 } // end namespace llvm
  58
  59 #undef DEBUG_TYPE
  60
  61 #endif