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 LoadedObjectInfoHelper<LoadedCOFFObjectInfo,
31 RuntimeDyld::LoadedObjectInfo> {
32 public:
LoadedCOFFObjectInfo(RuntimeDyldImpl & RTDyld,RuntimeDyld::LoadedObjectInfo::ObjSectionToIDMap ObjSecToIDMap)33 LoadedCOFFObjectInfo(
34 RuntimeDyldImpl &RTDyld,
35 RuntimeDyld::LoadedObjectInfo::ObjSectionToIDMap ObjSecToIDMap)
36 : LoadedObjectInfoHelper(RTDyld, std::move(ObjSecToIDMap)) {}
37
38 OwningBinary<ObjectFile>
getObjectForDebug(const ObjectFile & Obj) const39 getObjectForDebug(const ObjectFile &Obj) const override {
40 return OwningBinary<ObjectFile>();
41 }
42 };
43 }
44
45 namespace llvm {
46
47 std::unique_ptr<RuntimeDyldCOFF>
create(Triple::ArchType Arch,RuntimeDyld::MemoryManager & MemMgr,JITSymbolResolver & Resolver)48 llvm::RuntimeDyldCOFF::create(Triple::ArchType Arch,
49 RuntimeDyld::MemoryManager &MemMgr,
50 JITSymbolResolver &Resolver) {
51 switch (Arch) {
52 default: llvm_unreachable("Unsupported target for RuntimeDyldCOFF.");
53 case Triple::x86:
54 return make_unique<RuntimeDyldCOFFI386>(MemMgr, Resolver);
55 case Triple::thumb:
56 return make_unique<RuntimeDyldCOFFThumb>(MemMgr, Resolver);
57 case Triple::x86_64:
58 return make_unique<RuntimeDyldCOFFX86_64>(MemMgr, Resolver);
59 }
60 }
61
62 std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
loadObject(const object::ObjectFile & O)63 RuntimeDyldCOFF::loadObject(const object::ObjectFile &O) {
64 if (auto ObjSectionToIDOrErr = loadObjectImpl(O)) {
65 return llvm::make_unique<LoadedCOFFObjectInfo>(*this, *ObjSectionToIDOrErr);
66 } else {
67 HasError = true;
68 raw_string_ostream ErrStream(ErrorStr);
69 logAllUnhandledErrors(ObjSectionToIDOrErr.takeError(), ErrStream, "");
70 return nullptr;
71 }
72 }
73
getSymbolOffset(const SymbolRef & Sym)74 uint64_t RuntimeDyldCOFF::getSymbolOffset(const SymbolRef &Sym) {
75 // The value in a relocatable COFF object is the offset.
76 return Sym.getValue();
77 }
78
isCompatibleFile(const object::ObjectFile & Obj) const79 bool RuntimeDyldCOFF::isCompatibleFile(const object::ObjectFile &Obj) const {
80 return Obj.isCOFF();
81 }
82
83 } // namespace llvm
84