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
62