1 //===-- RuntimeDyldMachO.h - Run-time dynamic linker for MC-JIT ---*- C++ -*-=//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // MachO support for MC-JIT runtime dynamic linker.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_RUNTIME_DYLD_MACHO_H
15 #define LLVM_RUNTIME_DYLD_MACHO_H
17 #include "ObjectImageCommon.h"
18 #include "RuntimeDyldImpl.h"
19 #include "llvm/ADT/IndexedMap.h"
20 #include "llvm/Object/MachO.h"
21 #include "llvm/Support/Format.h"
24 using namespace llvm::object;
27 class RuntimeDyldMachO : public RuntimeDyldImpl {
28 bool resolveI386Relocation(uint8_t *LocalAddress, uint64_t FinalAddress,
29 uint64_t Value, bool isPCRel, unsigned Type,
30 unsigned Size, int64_t Addend);
31 bool resolveX86_64Relocation(uint8_t *LocalAddress, uint64_t FinalAddress,
32 uint64_t Value, bool isPCRel, unsigned Type,
33 unsigned Size, int64_t Addend);
34 bool resolveARMRelocation(uint8_t *LocalAddress, uint64_t FinalAddress,
35 uint64_t Value, bool isPCRel, unsigned Type,
36 unsigned Size, int64_t Addend);
38 void resolveRelocation(const SectionEntry &Section, uint64_t Offset,
39 uint64_t Value, uint32_t Type, int64_t Addend,
40 bool isPCRel, unsigned Size);
42 unsigned getMaxStubSize() override {
43 if (Arch == Triple::arm || Arch == Triple::thumb)
44 return 8; // 32-bit instruction and 32-bit address
45 else if (Arch == Triple::x86_64)
46 return 8; // GOT entry
51 unsigned getStubAlignment() override { return 1; }
53 struct EHFrameRelatedSections {
54 EHFrameRelatedSections()
55 : EHFrameSID(RTDYLD_INVALID_SECTION_ID),
56 TextSID(RTDYLD_INVALID_SECTION_ID),
57 ExceptTabSID(RTDYLD_INVALID_SECTION_ID) {}
58 EHFrameRelatedSections(SID EH, SID T, SID Ex)
59 : EHFrameSID(EH), TextSID(T), ExceptTabSID(Ex) {}
65 // When a module is loaded we save the SectionID of the EH frame section
66 // in a table until we receive a request to register all unregistered
67 // EH frame sections with the memory manager.
68 SmallVector<EHFrameRelatedSections, 2> UnregisteredEHFrameSections;
71 RuntimeDyldMachO(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) {}
73 void resolveRelocation(const RelocationEntry &RE, uint64_t Value) override;
75 processRelocationRef(unsigned SectionID, relocation_iterator RelI,
76 ObjectImage &Obj, ObjSectionToIDMap &ObjSectionToID,
77 const SymbolTableMap &Symbols, StubMap &Stubs) override;
78 bool isCompatibleFormat(const ObjectBuffer *Buffer) const override;
79 bool isCompatibleFile(const object::ObjectFile *Obj) const override;
80 void registerEHFrames() override;
81 void finalizeLoad(ObjSectionToIDMap &SectionMap) override;
83 static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer) {
84 return new ObjectImageCommon(InputBuffer);
88 createObjectImageFromFile(object::ObjectFile *InputObject) {
89 return new ObjectImageCommon(InputObject);
93 } // end namespace llvm