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//===--------- lib/ReaderWriter/ELF/ARM/ARMLinkingContext.h ---------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLD_READER_WRITER_ELF_ARM_ARM_LINKING_CONTEXT_H
#define LLD_READER_WRITER_ELF_ARM_ARM_LINKING_CONTEXT_H
#include "lld/ReaderWriter/ELFLinkingContext.h"
#include "llvm/Object/ELF.h"
#include "llvm/Support/ELF.h"
namespace lld {
namespace elf {
class ARMLinkingContext final : public ELFLinkingContext {
public:
int getMachineType() const override { return llvm::ELF::EM_ARM; }
ARMLinkingContext(llvm::Triple);
void addPasses(PassManager &) override;
void registerRelocationNames(Registry &r) override;
bool isRelaOutputFormat() const override { return false; }
uint64_t getBaseAddress() const override {
if (_baseAddress == 0)
return 0x400000;
return _baseAddress;
}
bool isDynamicRelocation(const Reference &r) const override {
if (r.kindNamespace() != Reference::KindNamespace::ELF)
return false;
assert(r.kindArch() == Reference::KindArch::ARM);
switch (r.kindValue()) {
case llvm::ELF::R_ARM_GLOB_DAT:
case llvm::ELF::R_ARM_TLS_TPOFF32:
case llvm::ELF::R_ARM_COPY:
return true;
default:
return false;
}
}
bool isCopyRelocation(const Reference &r) const override {
if (r.kindNamespace() != Reference::KindNamespace::ELF)
return false;
assert(r.kindArch() == Reference::KindArch::ARM);
return r.kindValue() == llvm::ELF::R_ARM_COPY;
}
bool isPLTRelocation(const Reference &r) const override {
if (r.kindNamespace() != Reference::KindNamespace::ELF)
return false;
assert(r.kindArch() == Reference::KindArch::ARM);
switch (r.kindValue()) {
case llvm::ELF::R_ARM_JUMP_SLOT:
case llvm::ELF::R_ARM_IRELATIVE:
return true;
default:
return false;
}
}
};
// Special methods to check code model of atoms.
bool isARMCode(const DefinedAtom *atom);
bool isARMCode(DefinedAtom::CodeModel codeModel);
bool isThumbCode(const DefinedAtom *atom);
bool isThumbCode(DefinedAtom::CodeModel codeModel);
} // end namespace elf
} // end namespace lld
#endif
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