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3e8fd62854
Having both Triple::arm64 and Triple::aarch64 is extremely confusing, and invites bugs where only one is checked. In reality, the only legitimate difference between the two (arm64 usually means iOS) is also present in the OS part of the triple and that's what should be checked. We still parse the "arm64" triple, just canonicalise it to Triple::aarch64, so there aren't any LLVM-side test changes. llvm-svn: 213743
129 lines
4.8 KiB
C++
129 lines
4.8 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_RUNTIME_DYLD_ELF_H
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#define LLVM_RUNTIME_DYLD_ELF_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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namespace {
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// Helper for extensive error checking in debug builds.
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std::error_code Check(std::error_code Err) {
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if (Err) {
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report_fatal_error(Err.message());
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}
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return Err;
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}
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} // end anonymous namespace
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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(ObjectImage &Obj, ObjSectionToIDMap &LocalSections,
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RelocationValueRef &Rel);
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void findOPDEntrySection(ObjectImage &Obj, 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) : 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 *Buffer) const override;
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void registerEHFrames() override;
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void deregisterEHFrames() override;
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void finalizeLoad(ObjectImage &ObjImg,
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ObjSectionToIDMap &SectionMap) override;
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virtual ~RuntimeDyldELF();
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static ObjectImage *createObjectImage(ObjectBuffer *InputBuffer);
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static ObjectImage *createObjectImageFromFile(std::unique_ptr<object::ObjectFile> Obj);
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};
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} // end namespace llvm
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#endif
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