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https://github.com/c64scene-ar/llvm-6502.git
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2c08439cf9
Provide basic support for dynamically loadable coff objects. Only handles a subset of x64 currently. Patch by Andy Ayers! Differential Revision: http://reviews.llvm.org/D7793 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231574 91177308-0d34-0410-b5e6-96231b3b80d8
123 lines
4.6 KiB
C++
123 lines
4.6 KiB
C++
//===-- RuntimeDyldELF.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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// ELF support for MC-JIT runtime dynamic linker.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_RUNTIMEDYLDELF_H
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#define LLVM_LIB_EXECUTIONENGINE_RUNTIMEDYLD_RUNTIMEDYLDELF_H
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#include "RuntimeDyldImpl.h"
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#include "llvm/ADT/DenseMap.h"
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using namespace llvm;
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namespace llvm {
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class RuntimeDyldELF : public RuntimeDyldImpl {
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void resolveRelocation(const SectionEntry &Section, uint64_t Offset,
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uint64_t Value, uint32_t Type, int64_t Addend,
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uint64_t SymOffset = 0);
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void resolveX86_64Relocation(const SectionEntry &Section, uint64_t Offset,
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uint64_t Value, uint32_t Type, int64_t Addend,
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uint64_t SymOffset);
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void resolveX86Relocation(const SectionEntry &Section, uint64_t Offset,
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uint32_t Value, uint32_t Type, int32_t Addend);
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void resolveAArch64Relocation(const SectionEntry &Section, uint64_t Offset,
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uint64_t Value, uint32_t Type, int64_t Addend);
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void resolveARMRelocation(const SectionEntry &Section, uint64_t Offset,
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uint32_t Value, uint32_t Type, int32_t Addend);
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void resolveMIPSRelocation(const SectionEntry &Section, uint64_t Offset,
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uint32_t Value, uint32_t Type, int32_t Addend);
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void resolvePPC64Relocation(const SectionEntry &Section, uint64_t Offset,
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uint64_t Value, uint32_t Type, int64_t Addend);
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void resolveSystemZRelocation(const SectionEntry &Section, uint64_t Offset,
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uint64_t Value, uint32_t Type, int64_t Addend);
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unsigned getMaxStubSize() override {
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if (Arch == Triple::aarch64 || Arch == Triple::aarch64_be)
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return 20; // movz; movk; movk; movk; br
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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::mipsel || Arch == Triple::mips)
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return 16;
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else if (Arch == Triple::ppc64 || Arch == Triple::ppc64le)
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return 44;
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else if (Arch == Triple::x86_64)
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return 6; // 2-byte jmp instruction + 32-bit relative address
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else if (Arch == Triple::systemz)
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return 16;
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else
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return 0;
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}
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unsigned getStubAlignment() override {
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if (Arch == Triple::systemz)
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return 8;
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else
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return 1;
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}
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void findPPC64TOCSection(const ObjectFile &Obj,
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ObjSectionToIDMap &LocalSections,
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RelocationValueRef &Rel);
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void findOPDEntrySection(const ObjectFile &Obj,
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ObjSectionToIDMap &LocalSections,
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RelocationValueRef &Rel);
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uint64_t findGOTEntry(uint64_t LoadAddr, uint64_t Offset);
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size_t getGOTEntrySize();
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void updateGOTEntries(StringRef Name, uint64_t Addr) override;
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// Relocation entries for symbols whose position-independent offset is
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// updated in a global offset table.
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typedef SmallVector<RelocationValueRef, 2> GOTRelocations;
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GOTRelocations GOTEntries; // List of entries requiring finalization.
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SmallVector<std::pair<SID, GOTRelocations>, 8> GOTs; // Allocated tables.
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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<SID, 2> UnregisteredEHFrameSections;
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SmallVector<SID, 2> RegisteredEHFrameSections;
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public:
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RuntimeDyldELF(RTDyldMemoryManager *mm);
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virtual ~RuntimeDyldELF();
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std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
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loadObject(const object::ObjectFile &O) override;
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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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const ObjectFile &Obj,
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ObjSectionToIDMap &ObjSectionToID,
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StubMap &Stubs) 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 deregisterEHFrames() override;
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void finalizeLoad(const ObjectFile &Obj,
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ObjSectionToIDMap &SectionMap) override;
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};
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} // end namespace llvm
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#endif
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