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/RuntimeDyldCOFFThumb.h"
17 #include "Targets/RuntimeDyldCOFFX86_64.h"
18 #include "llvm/ADT/STLExtras.h"
19 #include "llvm/ADT/Triple.h"
20 #include "llvm/Object/ObjectFile.h"
21
22 using namespace llvm;
23 using namespace llvm::object;
24
25 #define DEBUG_TYPE "dyld"
26
27 namespace {
28
29 class LoadedCOFFObjectInfo final
30 : public RuntimeDyld::LoadedObjectInfoHelper<LoadedCOFFObjectInfo> {
31 public:
LoadedCOFFObjectInfo(RuntimeDyldImpl & RTDyld,ObjSectionToIDMap ObjSecToIDMap)32 LoadedCOFFObjectInfo(RuntimeDyldImpl &RTDyld, ObjSectionToIDMap ObjSecToIDMap)
33 : LoadedObjectInfoHelper(RTDyld, std::move(ObjSecToIDMap)) {}
34
35 OwningBinary<ObjectFile>
getObjectForDebug(const ObjectFile & Obj) const36 getObjectForDebug(const ObjectFile &Obj) const override {
37 return OwningBinary<ObjectFile>();
38 }
39 };
40 }
41
42 namespace llvm {
43
44 std::unique_ptr<RuntimeDyldCOFF>
create(Triple::ArchType Arch,RuntimeDyld::MemoryManager & MemMgr,RuntimeDyld::SymbolResolver & Resolver)45 llvm::RuntimeDyldCOFF::create(Triple::ArchType Arch,
46 RuntimeDyld::MemoryManager &MemMgr,
47 RuntimeDyld::SymbolResolver &Resolver) {
48 switch (Arch) {
49 default: llvm_unreachable("Unsupported target for RuntimeDyldCOFF.");
50 case Triple::x86:
51 return make_unique<RuntimeDyldCOFFI386>(MemMgr, Resolver);
52 case Triple::thumb:
53 return make_unique<RuntimeDyldCOFFThumb>(MemMgr, Resolver);
54 case Triple::x86_64:
55 return make_unique<RuntimeDyldCOFFX86_64>(MemMgr, Resolver);
56 }
57 }
58
59 std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
loadObject(const object::ObjectFile & O)60 RuntimeDyldCOFF::loadObject(const object::ObjectFile &O) {
61 if (auto ObjSectionToIDOrErr = loadObjectImpl(O)) {
62 return llvm::make_unique<LoadedCOFFObjectInfo>(*this, *ObjSectionToIDOrErr);
63 } else {
64 HasError = true;
65 raw_string_ostream ErrStream(ErrorStr);
66 logAllUnhandledErrors(ObjSectionToIDOrErr.takeError(), ErrStream, "");
67 return nullptr;
68 }
69 }
70
getSymbolOffset(const SymbolRef & Sym)71 uint64_t RuntimeDyldCOFF::getSymbolOffset(const SymbolRef &Sym) {
72 // The value in a relocatable COFF object is the offset.
73 return Sym.getValue();
74 }
75
isCompatibleFile(const object::ObjectFile & Obj) const76 bool RuntimeDyldCOFF::isCompatibleFile(const object::ObjectFile &Obj) const {
77 return Obj.isCOFF();
78 }
79
80 } // namespace llvm
81