lib/ExecutionEngine/RuntimeDyld/RuntimeDyldCOFF.cpp

   1 //===-- RuntimeDyldCOFF.cpp - 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 // Implementation of COFF support for the MC-JIT runtime dynamic linker.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "RuntimeDyldCOFF.h"
  14 #include "Targets/RuntimeDyldCOFFI386.h"
  15 #include "Targets/RuntimeDyldCOFFThumb.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 LoadedObjectInfoHelper<LoadedCOFFObjectInfo,
  30                                     RuntimeDyld::LoadedObjectInfo> {
  31 public:
  32   LoadedCOFFObjectInfo(
  33       RuntimeDyldImpl &RTDyld,
  34       RuntimeDyld::LoadedObjectInfo::ObjSectionToIDMap ObjSecToIDMap)
  35       : LoadedObjectInfoHelper(RTDyld, std::move(ObjSecToIDMap)) {}
  36
  37   OwningBinary<ObjectFile>
  38   getObjectForDebug(const ObjectFile &Obj) const override {
  39     return OwningBinary<ObjectFile>();
  40   }
  41 };
  42 }
  43
  44 namespace llvm {
  45
  46 std::unique_ptr<RuntimeDyldCOFF>
  47 llvm::RuntimeDyldCOFF::create(Triple::ArchType Arch,
  48                               RuntimeDyld::MemoryManager &MemMgr,
  49                               JITSymbolResolver &Resolver) {
  50   switch (Arch) {
  51   default: llvm_unreachable("Unsupported target for RuntimeDyldCOFF.");
  52   case Triple::x86:
  53     return std::make_unique<RuntimeDyldCOFFI386>(MemMgr, Resolver);
  54   case Triple::thumb:
  55     return std::make_unique<RuntimeDyldCOFFThumb>(MemMgr, Resolver);
  56   case Triple::x86_64:
  57     return std::make_unique<RuntimeDyldCOFFX86_64>(MemMgr, Resolver);
  58   }
  59 }
  60
  61 std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
  62 RuntimeDyldCOFF::loadObject(const object::ObjectFile &O) {
  63   if (auto ObjSectionToIDOrErr = loadObjectImpl(O)) {
  64     return std::make_unique<LoadedCOFFObjectInfo>(*this, *ObjSectionToIDOrErr);
  65   } else {
  66     HasError = true;
  67     raw_string_ostream ErrStream(ErrorStr);
  68     logAllUnhandledErrors(ObjSectionToIDOrErr.takeError(), ErrStream);
  69     return nullptr;
  70   }
  71 }
  72
  73 uint64_t RuntimeDyldCOFF::getSymbolOffset(const SymbolRef &Sym) {
  74   // The value in a relocatable COFF object is the offset.
  75   return Sym.getValue();
  76 }
  77
  78 bool RuntimeDyldCOFF::isCompatibleFile(const object::ObjectFile &Obj) const {
  79   return Obj.isCOFF();
  80 }
  81
  82 } // namespace llvm