cdc1246750
Put sections to segments according to linker scripts if available. Rework the code of TargetLayout::assignSectionsToSegments so it operates on the given list of segments, which can be either read from linker scripts or constructed as before. Handle NONE segments defined in linker scripts by putting corresponding sections to PT_NULL segment. Consider flags set for segments through linker scripts. Differential Revision: http://reviews.llvm.org/D10918 llvm-svn: 243002
72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
//===- lib/ReaderWriter/ELF/Mips/MipsTargetLayout.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_MIPS_MIPS_TARGET_LAYOUT_H
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#define LLD_READER_WRITER_ELF_MIPS_MIPS_TARGET_LAYOUT_H
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#include "MipsAbiInfoHandler.h"
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#include "MipsSectionChunks.h"
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#include "TargetLayout.h"
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namespace lld {
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namespace elf {
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class MipsLinkingContext;
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/// \brief TargetLayout for Mips
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template <class ELFT> class MipsTargetLayout final : public TargetLayout<ELFT> {
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public:
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enum MipsSectionOrder {
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ORDER_MIPS_ABI_FLAGS = TargetLayout<ELFT>::ORDER_RO_NOTE + 1,
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ORDER_MIPS_REGINFO,
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ORDER_MIPS_OPTIONS,
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};
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MipsTargetLayout(MipsLinkingContext &ctx, MipsAbiInfoHandler<ELFT> &abi);
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const MipsGOTSection<ELFT> &getGOTSection() const { return *_gotSection; }
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const MipsPLTSection<ELFT> &getPLTSection() const { return *_pltSection; }
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AtomSection<ELFT> *
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createSection(StringRef name, int32_t type,
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DefinedAtom::ContentPermissions permissions,
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typename TargetLayout<ELFT>::SectionOrder order) override;
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typename TargetLayout<ELFT>::SegmentType
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getSegmentType(const Section<ELFT> *section) const override;
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/// \brief GP offset relative to .got section.
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uint64_t getGPOffset() const { return 0x7FF0; }
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/// \brief Get '_gp' symbol address.
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uint64_t getGPAddr();
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/// \brief Return the section order for a input section
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typename TargetLayout<ELFT>::SectionOrder
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getSectionOrder(StringRef name, int32_t contentType,
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int32_t contentPermissions) override;
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protected:
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unique_bump_ptr<RelocationTable<ELFT>>
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createRelocationTable(StringRef name, int32_t order) override;
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uint64_t getLookupSectionFlags(const OutputSection<ELFT> *os) const override;
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void sortSegments() override;
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private:
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MipsAbiInfoHandler<ELFT> &_abiInfo;
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MipsGOTSection<ELFT> *_gotSection;
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MipsPLTSection<ELFT> *_pltSection;
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uint64_t _gpAddr = 0;
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std::once_flag _gpOnce;
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};
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} // end namespace elf
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} // end namespace lld
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#endif
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