214122cffc
This is used when referencing global or static data in shared objects. This is also used when function's address is taken and function call is made indirectly. llvm-svn: 238014
81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
//===--------- lib/ReaderWriter/ELF/ARM/ARMLinkingContext.h ---------------===//
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//
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// The LLVM Linker
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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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#ifndef LLD_READER_WRITER_ELF_ARM_ARM_LINKING_CONTEXT_H
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#define LLD_READER_WRITER_ELF_ARM_ARM_LINKING_CONTEXT_H
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#include "lld/ReaderWriter/ELFLinkingContext.h"
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#include "llvm/Object/ELF.h"
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#include "llvm/Support/ELF.h"
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namespace lld {
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namespace elf {
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class ARMLinkingContext final : public ELFLinkingContext {
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public:
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int getMachineType() const override { return llvm::ELF::EM_ARM; }
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ARMLinkingContext(llvm::Triple);
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void addPasses(PassManager &) override;
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void registerRelocationNames(Registry &r) override;
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bool isRelaOutputFormat() const override { return false; }
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uint64_t getBaseAddress() const override {
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if (_baseAddress == 0)
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return 0x400000;
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return _baseAddress;
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}
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bool isDynamicRelocation(const Reference &r) const override {
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if (r.kindNamespace() != Reference::KindNamespace::ELF)
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return false;
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assert(r.kindArch() == Reference::KindArch::ARM);
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switch (r.kindValue()) {
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case llvm::ELF::R_ARM_GLOB_DAT:
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case llvm::ELF::R_ARM_TLS_TPOFF32:
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case llvm::ELF::R_ARM_COPY:
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return true;
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default:
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return false;
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}
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}
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bool isCopyRelocation(const Reference &r) const override {
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if (r.kindNamespace() != Reference::KindNamespace::ELF)
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return false;
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assert(r.kindArch() == Reference::KindArch::ARM);
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return r.kindValue() == llvm::ELF::R_ARM_COPY;
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}
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bool isPLTRelocation(const Reference &r) const override {
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if (r.kindNamespace() != Reference::KindNamespace::ELF)
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return false;
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assert(r.kindArch() == Reference::KindArch::ARM);
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switch (r.kindValue()) {
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case llvm::ELF::R_ARM_JUMP_SLOT:
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case llvm::ELF::R_ARM_IRELATIVE:
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return true;
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default:
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return false;
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}
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}
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};
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// Special methods to check code model of atoms.
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bool isARMCode(const DefinedAtom *atom);
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bool isARMCode(DefinedAtom::CodeModel codeModel);
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bool isThumbCode(const DefinedAtom *atom);
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bool isThumbCode(DefinedAtom::CodeModel codeModel);
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} // end namespace elf
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} // end namespace lld
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#endif
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