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https://github.com/c64scene-ar/llvm-6502.git
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7ede4b96de
MachO files using the GDB JIT debugging interface. Patch by Keno Fischer. Thanks Keno! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211652 91177308-0d34-0410-b5e6-96231b3b80d8
116 lines
4.0 KiB
C++
116 lines
4.0 KiB
C++
//===-- RuntimeDyldMachO.h - 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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// MachO support for MC-JIT runtime dynamic linker.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_RUNTIME_DYLD_MACHO_H
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#define LLVM_RUNTIME_DYLD_MACHO_H
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#include "ObjectImageCommon.h"
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#include "RuntimeDyldImpl.h"
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#include "llvm/ADT/IndexedMap.h"
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#include "llvm/Object/MachO.h"
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#include "llvm/Support/Format.h"
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using namespace llvm;
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using namespace llvm::object;
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namespace llvm {
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class RuntimeDyldMachO : public RuntimeDyldImpl {
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private:
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/// Write the least significant 'Size' bytes in 'Value' out at the address
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/// pointed to by Addr.
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bool applyRelocationValue(uint8_t *Addr, uint64_t Value, unsigned Size) {
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for (unsigned i = 0; i < Size; ++i) {
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*Addr++ = (uint8_t)Value;
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Value >>= 8;
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}
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return false;
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}
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bool resolveI386Relocation(const RelocationEntry &RE, uint64_t Value);
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bool resolveX86_64Relocation(const RelocationEntry &RE, uint64_t Value);
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bool resolveARMRelocation(const RelocationEntry &RE, uint64_t Value);
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bool resolveAArch64Relocation(const RelocationEntry &RE, uint64_t Value);
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// Populate stubs in __jump_table section.
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void populateJumpTable(MachOObjectFile &Obj, const SectionRef &JTSection,
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unsigned JTSectionID);
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// Populate __pointers section.
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void populatePointersSection(MachOObjectFile &Obj, const SectionRef &PTSection,
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unsigned PTSectionID);
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unsigned getMaxStubSize() override {
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if (Arch == Triple::arm || Arch == Triple::thumb)
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return 8; // 32-bit instruction and 32-bit address
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else if (Arch == Triple::x86_64)
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return 8; // GOT entry
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else
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return 0;
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}
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unsigned getStubAlignment() override { return 1; }
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relocation_iterator processSECTDIFFRelocation(
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unsigned SectionID,
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relocation_iterator RelI,
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ObjectImage &ObjImg,
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ObjSectionToIDMap &ObjSectionToID);
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relocation_iterator processI386ScatteredVANILLA(
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unsigned SectionID,
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relocation_iterator RelI,
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ObjectImage &ObjImg,
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ObjSectionToIDMap &ObjSectionToID);
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struct EHFrameRelatedSections {
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EHFrameRelatedSections()
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: EHFrameSID(RTDYLD_INVALID_SECTION_ID),
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TextSID(RTDYLD_INVALID_SECTION_ID),
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ExceptTabSID(RTDYLD_INVALID_SECTION_ID) {}
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EHFrameRelatedSections(SID EH, SID T, SID Ex)
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: EHFrameSID(EH), TextSID(T), ExceptTabSID(Ex) {}
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SID EHFrameSID;
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SID TextSID;
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SID ExceptTabSID;
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};
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// When a module is loaded we save the SectionID of the EH frame section
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// in a table until we receive a request to register all unregistered
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// EH frame sections with the memory manager.
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SmallVector<EHFrameRelatedSections, 2> UnregisteredEHFrameSections;
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public:
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RuntimeDyldMachO(RTDyldMemoryManager *mm) : RuntimeDyldImpl(mm) {}
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void resolveRelocation(const RelocationEntry &RE, uint64_t Value) override;
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relocation_iterator
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processRelocationRef(unsigned SectionID, relocation_iterator RelI,
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ObjectImage &Obj, ObjSectionToIDMap &ObjSectionToID,
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const SymbolTableMap &Symbols, StubMap &Stubs) override;
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bool isCompatibleFormat(const ObjectBuffer *Buffer) const override;
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bool isCompatibleFile(const object::ObjectFile *Obj) const override;
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void registerEHFrames() override;
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void finalizeLoad(ObjectImage &ObjImg,
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ObjSectionToIDMap &SectionMap) override;
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static ObjectImage *createObjectImage(ObjectBuffer *Buffer);
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static ObjectImage *
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createObjectImageFromFile(std::unique_ptr<object::ObjectFile> InputObject);
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};
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} // end namespace llvm
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#endif
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