f6b5f0fffd
This adds rudimentary support for COFF ARM to the dynamic loader for the exeuction engine. This can be used by lldb to JIT code into a COFF ARM environment. This lays the foundation for the loader, though a few of the relocation types are yet unhandled. llvm-svn: 273682
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
//===-- RuntimeDyldCOFF.cpp - Run-time dynamic linker for MC-JIT -*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Implementation of COFF support for the MC-JIT runtime dynamic linker.
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//
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//===----------------------------------------------------------------------===//
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#include "RuntimeDyldCOFF.h"
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#include "Targets/RuntimeDyldCOFFI386.h"
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#include "Targets/RuntimeDyldCOFFThumb.h"
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#include "Targets/RuntimeDyldCOFFX86_64.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Object/ObjectFile.h"
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using namespace llvm;
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using namespace llvm::object;
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#define DEBUG_TYPE "dyld"
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namespace {
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class LoadedCOFFObjectInfo final
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: public RuntimeDyld::LoadedObjectInfoHelper<LoadedCOFFObjectInfo> {
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public:
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LoadedCOFFObjectInfo(RuntimeDyldImpl &RTDyld, ObjSectionToIDMap ObjSecToIDMap)
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: LoadedObjectInfoHelper(RTDyld, std::move(ObjSecToIDMap)) {}
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OwningBinary<ObjectFile>
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getObjectForDebug(const ObjectFile &Obj) const override {
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return OwningBinary<ObjectFile>();
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}
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};
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}
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namespace llvm {
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std::unique_ptr<RuntimeDyldCOFF>
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llvm::RuntimeDyldCOFF::create(Triple::ArchType Arch,
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RuntimeDyld::MemoryManager &MemMgr,
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RuntimeDyld::SymbolResolver &Resolver) {
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switch (Arch) {
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default: llvm_unreachable("Unsupported target for RuntimeDyldCOFF.");
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case Triple::x86:
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return make_unique<RuntimeDyldCOFFI386>(MemMgr, Resolver);
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case Triple::thumb:
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return make_unique<RuntimeDyldCOFFThumb>(MemMgr, Resolver);
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case Triple::x86_64:
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return make_unique<RuntimeDyldCOFFX86_64>(MemMgr, Resolver);
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}
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}
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std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
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RuntimeDyldCOFF::loadObject(const object::ObjectFile &O) {
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if (auto ObjSectionToIDOrErr = loadObjectImpl(O)) {
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return llvm::make_unique<LoadedCOFFObjectInfo>(*this, *ObjSectionToIDOrErr);
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} else {
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HasError = true;
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raw_string_ostream ErrStream(ErrorStr);
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logAllUnhandledErrors(ObjSectionToIDOrErr.takeError(), ErrStream, "");
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return nullptr;
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}
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}
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uint64_t RuntimeDyldCOFF::getSymbolOffset(const SymbolRef &Sym) {
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// The value in a relocatable COFF object is the offset.
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return Sym.getValue();
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}
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bool RuntimeDyldCOFF::isCompatibleFile(const object::ObjectFile &Obj) const {
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return Obj.isCOFF();
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}
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} // namespace llvm
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