1 //===-- RuntimeDyldCOFF.cpp - Run-time dynamic linker for MC-JIT -*- C++ -*-==//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // Implementation of COFF support for the MC-JIT runtime dynamic linker.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "RuntimeDyldCOFF.h"
15 #include "Targets/RuntimeDyldCOFFI386.h"
16 #include "Targets/RuntimeDyldCOFFX86_64.h"
17 #include "llvm/ADT/STLExtras.h"
18 #include "llvm/ADT/Triple.h"
19 #include "llvm/Object/ObjectFile.h"
20
21 using namespace llvm;
22 using namespace llvm::object;
23
24 #define DEBUG_TYPE "dyld"
25
26 namespace {
27
28 class LoadedCOFFObjectInfo final
29 : public RuntimeDyld::LoadedObjectInfoHelper<LoadedCOFFObjectInfo> {
30 public:
LoadedCOFFObjectInfo(RuntimeDyldImpl & RTDyld,ObjSectionToIDMap ObjSecToIDMap)31 LoadedCOFFObjectInfo(RuntimeDyldImpl &RTDyld, ObjSectionToIDMap ObjSecToIDMap)
32 : LoadedObjectInfoHelper(RTDyld, std::move(ObjSecToIDMap)) {}
33
34 OwningBinary<ObjectFile>
getObjectForDebug(const ObjectFile & Obj) const35 getObjectForDebug(const ObjectFile &Obj) const override {
36 return OwningBinary<ObjectFile>();
37 }
38 };
39 }
40
41 namespace llvm {
42
43 std::unique_ptr<RuntimeDyldCOFF>
create(Triple::ArchType Arch,RuntimeDyld::MemoryManager & MemMgr,RuntimeDyld::SymbolResolver & Resolver)44 llvm::RuntimeDyldCOFF::create(Triple::ArchType Arch,
45 RuntimeDyld::MemoryManager &MemMgr,
46 RuntimeDyld::SymbolResolver &Resolver) {
47 switch (Arch) {
48 default:
49 llvm_unreachable("Unsupported target for RuntimeDyldCOFF.");
50 break;
51 case Triple::x86:
52 return make_unique<RuntimeDyldCOFFI386>(MemMgr, Resolver);
53 case Triple::x86_64:
54 return make_unique<RuntimeDyldCOFFX86_64>(MemMgr, Resolver);
55 }
56 }
57
58 std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
loadObject(const object::ObjectFile & O)59 RuntimeDyldCOFF::loadObject(const object::ObjectFile &O) {
60 return llvm::make_unique<LoadedCOFFObjectInfo>(*this, loadObjectImpl(O));
61 }
62
getSymbolOffset(const SymbolRef & Sym)63 uint64_t RuntimeDyldCOFF::getSymbolOffset(const SymbolRef &Sym) {
64 // The value in a relocatable COFF object is the offset.
65 return Sym.getValue();
66 }
67
isCompatibleFile(const object::ObjectFile & Obj) const68 bool RuntimeDyldCOFF::isCompatibleFile(const object::ObjectFile &Obj) const {
69 return Obj.isCOFF();
70 }
71
72 } // namespace llvm
73