RuntimeDyldMachO.h [plain text]
#ifndef LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_RUNTIMEDYLDMACHO_H
#define LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_RUNTIMEDYLDMACHO_H
#include "ObjectImageCommon.h"
#include "RuntimeDyldImpl.h"
#include "llvm/Object/MachO.h"
#include "llvm/Support/Format.h"
#define DEBUG_TYPE "dyld"
using namespace llvm;
using namespace llvm::object;
namespace llvm {
class RuntimeDyldMachO : public RuntimeDyldImpl {
protected:
struct SectionOffsetPair {
unsigned SectionID;
uint64_t Offset;
};
struct EHFrameRelatedSections {
EHFrameRelatedSections()
: EHFrameSID(RTDYLD_INVALID_SECTION_ID),
TextSID(RTDYLD_INVALID_SECTION_ID),
ExceptTabSID(RTDYLD_INVALID_SECTION_ID) {}
EHFrameRelatedSections(SID EH, SID T, SID Ex)
: EHFrameSID(EH), TextSID(T), ExceptTabSID(Ex) {}
SID EHFrameSID;
SID TextSID;
SID ExceptTabSID;
};
SmallVector<EHFrameRelatedSections, 2> UnregisteredEHFrameSections;
RuntimeDyldMachO(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) {}
int64_t memcpyAddend(const RelocationEntry &RE) const;
RelocationEntry getRelocationEntry(unsigned SectionID, ObjectImage &ObjImg,
const relocation_iterator &RI) const {
const MachOObjectFile &Obj =
static_cast<const MachOObjectFile &>(*ObjImg.getObjectFile());
MachO::any_relocation_info RelInfo =
Obj.getRelocation(RI->getRawDataRefImpl());
bool IsPCRel = Obj.getAnyRelocationPCRel(RelInfo);
unsigned Size = Obj.getAnyRelocationLength(RelInfo);
uint64_t Offset;
RI->getOffset(Offset);
MachO::RelocationInfoType RelType =
static_cast<MachO::RelocationInfoType>(Obj.getAnyRelocationType(RelInfo));
return RelocationEntry(SectionID, Offset, RelType, 0, IsPCRel, Size);
}
RelocationValueRef getRelocationValueRef(ObjectImage &ObjImg,
const relocation_iterator &RI,
const RelocationEntry &RE,
ObjSectionToIDMap &ObjSectionToID,
const SymbolTableMap &Symbols);
void makeValueAddendPCRel(RelocationValueRef &Value, ObjectImage &ObjImg,
const relocation_iterator &RI,
unsigned OffsetToNextPC);
void dumpRelocationToResolve(const RelocationEntry &RE, uint64_t Value) const;
static section_iterator getSectionByAddress(const MachOObjectFile &Obj,
uint64_t Addr);
void populateIndirectSymbolPointersSection(MachOObjectFile &Obj,
const SectionRef &PTSection,
unsigned PTSectionID);
public:
static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer) {
return new ObjectImageCommon(InputBuffer);
}
static ObjectImage *
createObjectImageFromFile(std::unique_ptr<object::ObjectFile> InputObject) {
return new ObjectImageCommon(std::move(InputObject));
}
static std::unique_ptr<RuntimeDyldMachO> create(Triple::ArchType Arch,
RTDyldMemoryManager *mm);
SectionEntry &getSection(unsigned SectionID) { return Sections[SectionID]; }
bool isCompatibleFormat(const ObjectBuffer *Buffer) const override;
bool isCompatibleFile(const object::ObjectFile *Obj) const override;
};
template <typename Impl>
class RuntimeDyldMachOCRTPBase : public RuntimeDyldMachO {
private:
Impl &impl() { return static_cast<Impl &>(*this); }
const Impl &impl() const { return static_cast<const Impl &>(*this); }
unsigned char *processFDE(unsigned char *P, int64_t DeltaForText,
int64_t DeltaForEH);
public:
RuntimeDyldMachOCRTPBase(RTDyldMemoryManager *mm) : RuntimeDyldMachO(mm) {}
void finalizeLoad(ObjectImage &ObjImg,
ObjSectionToIDMap &SectionMap) override;
void registerEHFrames() override;
};
}
#undef DEBUG_TYPE
#endif