#ifndef LLVM_RUNTIME_DYLD_MACHO_H
#define LLVM_RUNTIME_DYLD_MACHO_H
+#include "ObjectImageCommon.h"
+#include "RuntimeDyldImpl.h"
#include "llvm/ADT/IndexedMap.h"
-#include "llvm/Object/MachOObject.h"
+#include "llvm/Object/MachO.h"
#include "llvm/Support/Format.h"
-#include "RuntimeDyldImpl.h"
using namespace llvm;
using namespace llvm::object;
-
namespace llvm {
class RuntimeDyldMachO : public RuntimeDyldImpl {
+ bool resolveI386Relocation(uint8_t *LocalAddress, uint64_t FinalAddress,
+ uint64_t Value, bool isPCRel, unsigned Type,
+ unsigned Size, int64_t Addend);
+ bool resolveX86_64Relocation(uint8_t *LocalAddress, uint64_t FinalAddress,
+ uint64_t Value, bool isPCRel, unsigned Type,
+ unsigned Size, int64_t Addend);
+ bool resolveARMRelocation(uint8_t *LocalAddress, uint64_t FinalAddress,
+ uint64_t Value, bool isPCRel, unsigned Type,
+ unsigned Size, int64_t Addend);
+ bool resolveARM64Relocation(uint8_t *LocalAddress, uint64_t FinalAddress,
+ uint64_t Value, bool IsPCRel, unsigned Type,
+ unsigned Size, int64_t Addend);
+
+ void resolveRelocation(const SectionEntry &Section, uint64_t Offset,
+ uint64_t Value, uint32_t Type, int64_t Addend,
+ bool isPCRel, unsigned Size);
+
+ unsigned getMaxStubSize() override {
+ if (Arch == Triple::arm || Arch == Triple::thumb)
+ return 8; // 32-bit instruction and 32-bit address
+ else if (Arch == Triple::x86_64)
+ return 8; // GOT entry
+ else
+ return 0;
+ }
- // For each symbol, keep a list of relocations based on it. Anytime
- // its address is reassigned (the JIT re-compiled the function, e.g.),
- // the relocations get re-resolved.
- // The symbol (or section) the relocation is sourced from is the Key
- // in the relocation list where it's stored.
- struct RelocationEntry {
- unsigned SectionID; // Section the relocation is contained in.
- uint64_t Offset; // Offset into the section for the relocation.
- uint32_t Data; // Second word of the raw macho relocation entry.
- int64_t Addend; // Addend encoded in the instruction itself, if any,
- // plus the offset into the source section for
- // the symbol once the relocation is resolvable.
-
- RelocationEntry(unsigned id, uint64_t offset, uint32_t data, int64_t addend)
- : SectionID(id), Offset(offset), Data(data), Addend(addend) {}
- };
- typedef SmallVector<RelocationEntry, 4> RelocationList;
-
- // For each section, keep a list of referrers in that section that are clients
- // of relocations in other sections. Whenever a relocation gets created,
- // create a corresponding referrer. Whenever relocations are re-resolved,
- // re-resolve the referrers' relocations as well.
- struct Referrer {
- unsigned SectionID; // Section whose RelocationList contains the relocation.
- uint32_t Index; // Index of the RelocatonEntry in that RelocationList.
-
- Referrer(unsigned id, uint32_t index)
- : SectionID(id), Index(index) {}
+ unsigned getStubAlignment() override { return 1; }
+
+ 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;
};
- typedef SmallVector<Referrer, 4> ReferrerList;
-
- // Relocations to sections already loaded. Indexed by SectionID which is the
- // source of the address. The target where the address will be writen is
- // SectionID/Offset in the relocation itself.
- IndexedMap<RelocationList> Relocations;
- // Referrers corresponding to Relocations.
- IndexedMap<ReferrerList> Referrers;
- // Relocations to symbols that are not yet resolved. Must be external
- // relocations by definition. Indexed by symbol name.
- StringMap<RelocationList> UnresolvedRelocations;
-
- bool resolveRelocation(uint8_t *LocalAddress,
- uint64_t FinalAddress,
- uint64_t Value,
- bool isPCRel,
- unsigned Type,
- unsigned Size,
- int64_t Addend);
- bool resolveI386Relocation(uint8_t *LocalAddress,
- uint64_t FinalAddress,
- uint64_t Value,
- bool isPCRel,
- unsigned Type,
- unsigned Size,
- int64_t Addend);
- bool resolveX86_64Relocation(uint8_t *LocalAddress,
- uint64_t FinalAddress,
- uint64_t Value,
- bool isPCRel,
- unsigned Type,
- unsigned Size,
- int64_t Addend);
- bool resolveARMRelocation(uint8_t *LocalAddress,
- uint64_t FinalAddress,
- uint64_t Value,
- bool isPCRel,
- unsigned Type,
- unsigned Size,
- int64_t Addend);
-
- bool loadSegment32(const MachOObject *Obj,
- const MachOObject::LoadCommandInfo *SegmentLCI,
- const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
- bool loadSegment64(const MachOObject *Obj,
- const MachOObject::LoadCommandInfo *SegmentLCI,
- const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
- bool processSymbols32(const MachOObject *Obj,
- SmallVectorImpl<unsigned> &SectionMap,
- SmallVectorImpl<StringRef> &SymbolNames,
- const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
- bool processSymbols64(const MachOObject *Obj,
- SmallVectorImpl<unsigned> &SectionMap,
- SmallVectorImpl<StringRef> &SymbolNames,
- const InMemoryStruct<macho::SymtabLoadCommand> &SymtabLC);
- void resolveSymbol(StringRef Name);
+ // When a module is loaded we save the SectionID of the EH frame section
+ // in a table until we receive a request to register all unregistered
+ // EH frame sections with the memory manager.
+ SmallVector<EHFrameRelatedSections, 2> UnregisteredEHFrameSections;
public:
RuntimeDyldMachO(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) {}
- bool loadObject(MemoryBuffer *InputBuffer);
-
- void reassignSectionAddress(unsigned SectionID, uint64_t Addr);
-
- static bool isKnownFormat(const MemoryBuffer *InputBuffer);
+ void resolveRelocation(const RelocationEntry &RE, uint64_t Value) override;
+ relocation_iterator
+ processRelocationRef(unsigned SectionID, relocation_iterator RelI,
+ ObjectImage &Obj, ObjSectionToIDMap &ObjSectionToID,
+ const SymbolTableMap &Symbols, StubMap &Stubs) override;
+ bool isCompatibleFormat(const ObjectBuffer *Buffer) const override;
+ bool isCompatibleFile(const object::ObjectFile *Obj) const override;
+ void registerEHFrames() override;
+ void finalizeLoad(ObjSectionToIDMap &SectionMap) override;
+
+ static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer) {
+ return new ObjectImageCommon(InputBuffer);
+ }
- bool isCompatibleFormat(const MemoryBuffer *InputBuffer) const {
- return isKnownFormat(InputBuffer);
+ static ObjectImage *
+ createObjectImageFromFile(object::ObjectFile *InputObject) {
+ return new ObjectImageCommon(InputObject);
}
};
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