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author | orivej <orivej@yandex-team.ru> | 2022-02-10 16:44:49 +0300 |
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committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:44:49 +0300 |
commit | 718c552901d703c502ccbefdfc3c9028d608b947 (patch) | |
tree | 46534a98bbefcd7b1f3faa5b52c138ab27db75b7 /contrib/libs/llvm12/include/llvm/MC/MCMachObjectWriter.h | |
parent | e9656aae26e0358d5378e5b63dcac5c8dbe0e4d0 (diff) | |
download | ydb-718c552901d703c502ccbefdfc3c9028d608b947.tar.gz |
Restoring authorship annotation for <orivej@yandex-team.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/llvm12/include/llvm/MC/MCMachObjectWriter.h')
-rw-r--r-- | contrib/libs/llvm12/include/llvm/MC/MCMachObjectWriter.h | 580 |
1 files changed, 290 insertions, 290 deletions
diff --git a/contrib/libs/llvm12/include/llvm/MC/MCMachObjectWriter.h b/contrib/libs/llvm12/include/llvm/MC/MCMachObjectWriter.h index 8ffd972bb6..08c0c952f9 100644 --- a/contrib/libs/llvm12/include/llvm/MC/MCMachObjectWriter.h +++ b/contrib/libs/llvm12/include/llvm/MC/MCMachObjectWriter.h @@ -1,293 +1,293 @@ -#pragma once - -#ifdef __GNUC__ -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wunused-parameter" -#endif - -//===- llvm/MC/MCMachObjectWriter.h - Mach Object Writer --------*- C++ -*-===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_MC_MCMACHOBJECTWRITER_H -#define LLVM_MC_MCMACHOBJECTWRITER_H - -#include "llvm/ADT/DenseMap.h" -#include "llvm/ADT/StringRef.h" -#include "llvm/BinaryFormat/MachO.h" -#include "llvm/MC/MCExpr.h" -#include "llvm/MC/MCObjectWriter.h" -#include "llvm/MC/MCSection.h" -#include "llvm/MC/StringTableBuilder.h" -#include "llvm/Support/EndianStream.h" -#include <cstdint> -#include <memory> -#include <string> -#include <vector> - -namespace llvm { - -class MachObjectWriter; - -class MCMachObjectTargetWriter : public MCObjectTargetWriter { - const unsigned Is64Bit : 1; - const uint32_t CPUType; -protected: - uint32_t CPUSubtype; -public: - unsigned LocalDifference_RIT; - -protected: - MCMachObjectTargetWriter(bool Is64Bit_, uint32_t CPUType_, - uint32_t CPUSubtype_); - - void setLocalDifferenceRelocationType(unsigned Type) { - LocalDifference_RIT = Type; - } - -public: - virtual ~MCMachObjectTargetWriter(); - - Triple::ObjectFormatType getFormat() const override { return Triple::MachO; } - static bool classof(const MCObjectTargetWriter *W) { - return W->getFormat() == Triple::MachO; - } - - /// \name Lifetime Management - /// @{ - - virtual void reset() {} - - /// @} - - /// \name Accessors - /// @{ - - bool is64Bit() const { return Is64Bit; } - uint32_t getCPUType() const { return CPUType; } - uint32_t getCPUSubtype() const { return CPUSubtype; } - unsigned getLocalDifferenceRelocationType() const { - return LocalDifference_RIT; - } - - /// @} - - /// \name API - /// @{ - - virtual void recordRelocation(MachObjectWriter *Writer, MCAssembler &Asm, - const MCAsmLayout &Layout, - const MCFragment *Fragment, - const MCFixup &Fixup, MCValue Target, - uint64_t &FixedValue) = 0; - - /// @} -}; - -class MachObjectWriter : public MCObjectWriter { - /// Helper struct for containing some precomputed information on symbols. - struct MachSymbolData { - const MCSymbol *Symbol; - uint64_t StringIndex; - uint8_t SectionIndex; - - // Support lexicographic sorting. - bool operator<(const MachSymbolData &RHS) const; - }; - - /// The target specific Mach-O writer instance. - std::unique_ptr<MCMachObjectTargetWriter> TargetObjectWriter; - - /// \name Relocation Data - /// @{ - - struct RelAndSymbol { - const MCSymbol *Sym; - MachO::any_relocation_info MRE; - RelAndSymbol(const MCSymbol *Sym, const MachO::any_relocation_info &MRE) - : Sym(Sym), MRE(MRE) {} - }; - - DenseMap<const MCSection *, std::vector<RelAndSymbol>> Relocations; - DenseMap<const MCSection *, unsigned> IndirectSymBase; - - SectionAddrMap SectionAddress; - - /// @} - /// \name Symbol Table Data - /// @{ - +#pragma once + +#ifdef __GNUC__ +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wunused-parameter" +#endif + +//===- llvm/MC/MCMachObjectWriter.h - Mach Object Writer --------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_MC_MCMACHOBJECTWRITER_H +#define LLVM_MC_MCMACHOBJECTWRITER_H + +#include "llvm/ADT/DenseMap.h" +#include "llvm/ADT/StringRef.h" +#include "llvm/BinaryFormat/MachO.h" +#include "llvm/MC/MCExpr.h" +#include "llvm/MC/MCObjectWriter.h" +#include "llvm/MC/MCSection.h" +#include "llvm/MC/StringTableBuilder.h" +#include "llvm/Support/EndianStream.h" +#include <cstdint> +#include <memory> +#include <string> +#include <vector> + +namespace llvm { + +class MachObjectWriter; + +class MCMachObjectTargetWriter : public MCObjectTargetWriter { + const unsigned Is64Bit : 1; + const uint32_t CPUType; +protected: + uint32_t CPUSubtype; +public: + unsigned LocalDifference_RIT; + +protected: + MCMachObjectTargetWriter(bool Is64Bit_, uint32_t CPUType_, + uint32_t CPUSubtype_); + + void setLocalDifferenceRelocationType(unsigned Type) { + LocalDifference_RIT = Type; + } + +public: + virtual ~MCMachObjectTargetWriter(); + + Triple::ObjectFormatType getFormat() const override { return Triple::MachO; } + static bool classof(const MCObjectTargetWriter *W) { + return W->getFormat() == Triple::MachO; + } + + /// \name Lifetime Management + /// @{ + + virtual void reset() {} + + /// @} + + /// \name Accessors + /// @{ + + bool is64Bit() const { return Is64Bit; } + uint32_t getCPUType() const { return CPUType; } + uint32_t getCPUSubtype() const { return CPUSubtype; } + unsigned getLocalDifferenceRelocationType() const { + return LocalDifference_RIT; + } + + /// @} + + /// \name API + /// @{ + + virtual void recordRelocation(MachObjectWriter *Writer, MCAssembler &Asm, + const MCAsmLayout &Layout, + const MCFragment *Fragment, + const MCFixup &Fixup, MCValue Target, + uint64_t &FixedValue) = 0; + + /// @} +}; + +class MachObjectWriter : public MCObjectWriter { + /// Helper struct for containing some precomputed information on symbols. + struct MachSymbolData { + const MCSymbol *Symbol; + uint64_t StringIndex; + uint8_t SectionIndex; + + // Support lexicographic sorting. + bool operator<(const MachSymbolData &RHS) const; + }; + + /// The target specific Mach-O writer instance. + std::unique_ptr<MCMachObjectTargetWriter> TargetObjectWriter; + + /// \name Relocation Data + /// @{ + + struct RelAndSymbol { + const MCSymbol *Sym; + MachO::any_relocation_info MRE; + RelAndSymbol(const MCSymbol *Sym, const MachO::any_relocation_info &MRE) + : Sym(Sym), MRE(MRE) {} + }; + + DenseMap<const MCSection *, std::vector<RelAndSymbol>> Relocations; + DenseMap<const MCSection *, unsigned> IndirectSymBase; + + SectionAddrMap SectionAddress; + + /// @} + /// \name Symbol Table Data + /// @{ + StringTableBuilder StringTable; - std::vector<MachSymbolData> LocalSymbolData; - std::vector<MachSymbolData> ExternalSymbolData; - std::vector<MachSymbolData> UndefinedSymbolData; - - /// @} - - MachSymbolData *findSymbolData(const MCSymbol &Sym); - - void writeWithPadding(StringRef Str, uint64_t Size); - -public: - MachObjectWriter(std::unique_ptr<MCMachObjectTargetWriter> MOTW, - raw_pwrite_stream &OS, bool IsLittleEndian) - : TargetObjectWriter(std::move(MOTW)), + std::vector<MachSymbolData> LocalSymbolData; + std::vector<MachSymbolData> ExternalSymbolData; + std::vector<MachSymbolData> UndefinedSymbolData; + + /// @} + + MachSymbolData *findSymbolData(const MCSymbol &Sym); + + void writeWithPadding(StringRef Str, uint64_t Size); + +public: + MachObjectWriter(std::unique_ptr<MCMachObjectTargetWriter> MOTW, + raw_pwrite_stream &OS, bool IsLittleEndian) + : TargetObjectWriter(std::move(MOTW)), StringTable(TargetObjectWriter->is64Bit() ? StringTableBuilder::MachO64 : StringTableBuilder::MachO), - W(OS, IsLittleEndian ? support::little : support::big) {} - - support::endian::Writer W; - - const MCSymbol &findAliasedSymbol(const MCSymbol &Sym) const; - - /// \name Lifetime management Methods - /// @{ - - void reset() override; - - /// @} - - /// \name Utility Methods - /// @{ - - bool isFixupKindPCRel(const MCAssembler &Asm, unsigned Kind); - - SectionAddrMap &getSectionAddressMap() { return SectionAddress; } - - uint64_t getSectionAddress(const MCSection *Sec) const { - return SectionAddress.lookup(Sec); - } - uint64_t getSymbolAddress(const MCSymbol &S, const MCAsmLayout &Layout) const; - - uint64_t getFragmentAddress(const MCFragment *Fragment, - const MCAsmLayout &Layout) const; - - uint64_t getPaddingSize(const MCSection *SD, const MCAsmLayout &Layout) const; - - bool doesSymbolRequireExternRelocation(const MCSymbol &S); - - /// @} - - /// \name Target Writer Proxy Accessors - /// @{ - - bool is64Bit() const { return TargetObjectWriter->is64Bit(); } - bool isX86_64() const { - uint32_t CPUType = TargetObjectWriter->getCPUType(); - return CPUType == MachO::CPU_TYPE_X86_64; - } - - /// @} - - void writeHeader(MachO::HeaderFileType Type, unsigned NumLoadCommands, - unsigned LoadCommandsSize, bool SubsectionsViaSymbols); - - /// Write a segment load command. - /// - /// \param NumSections The number of sections in this segment. - /// \param SectionDataSize The total size of the sections. - void writeSegmentLoadCommand(StringRef Name, unsigned NumSections, - uint64_t VMAddr, uint64_t VMSize, - uint64_t SectionDataStartOffset, - uint64_t SectionDataSize, uint32_t MaxProt, - uint32_t InitProt); - - void writeSection(const MCAsmLayout &Layout, const MCSection &Sec, - uint64_t VMAddr, uint64_t FileOffset, unsigned Flags, - uint64_t RelocationsStart, unsigned NumRelocations); - - void writeSymtabLoadCommand(uint32_t SymbolOffset, uint32_t NumSymbols, - uint32_t StringTableOffset, - uint32_t StringTableSize); - - void writeDysymtabLoadCommand( - uint32_t FirstLocalSymbol, uint32_t NumLocalSymbols, - uint32_t FirstExternalSymbol, uint32_t NumExternalSymbols, - uint32_t FirstUndefinedSymbol, uint32_t NumUndefinedSymbols, - uint32_t IndirectSymbolOffset, uint32_t NumIndirectSymbols); - - void writeNlist(MachSymbolData &MSD, const MCAsmLayout &Layout); - - void writeLinkeditLoadCommand(uint32_t Type, uint32_t DataOffset, - uint32_t DataSize); - - void writeLinkerOptionsLoadCommand(const std::vector<std::string> &Options); - - // FIXME: We really need to improve the relocation validation. Basically, we - // want to implement a separate computation which evaluates the relocation - // entry as the linker would, and verifies that the resultant fixup value is - // exactly what the encoder wanted. This will catch several classes of - // problems: - // - // - Relocation entry bugs, the two algorithms are unlikely to have the same - // exact bug. - // - // - Relaxation issues, where we forget to relax something. - // - // - Input errors, where something cannot be correctly encoded. 'as' allows - // these through in many cases. - - // Add a relocation to be output in the object file. At the time this is - // called, the symbol indexes are not know, so if the relocation refers - // to a symbol it should be passed as \p RelSymbol so that it can be updated - // afterwards. If the relocation doesn't refer to a symbol, nullptr should be - // used. - void addRelocation(const MCSymbol *RelSymbol, const MCSection *Sec, - MachO::any_relocation_info &MRE) { - RelAndSymbol P(RelSymbol, MRE); - Relocations[Sec].push_back(P); - } - - void recordRelocation(MCAssembler &Asm, const MCAsmLayout &Layout, - const MCFragment *Fragment, const MCFixup &Fixup, - MCValue Target, uint64_t &FixedValue) override; - - void bindIndirectSymbols(MCAssembler &Asm); - - /// Compute the symbol table data. - void computeSymbolTable(MCAssembler &Asm, - std::vector<MachSymbolData> &LocalSymbolData, - std::vector<MachSymbolData> &ExternalSymbolData, - std::vector<MachSymbolData> &UndefinedSymbolData); - - void computeSectionAddresses(const MCAssembler &Asm, - const MCAsmLayout &Layout); - - void executePostLayoutBinding(MCAssembler &Asm, - const MCAsmLayout &Layout) override; - - bool isSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm, - const MCSymbol &A, - const MCSymbol &B, - bool InSet) const override; - - bool isSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm, - const MCSymbol &SymA, - const MCFragment &FB, bool InSet, - bool IsPCRel) const override; - - uint64_t writeObject(MCAssembler &Asm, const MCAsmLayout &Layout) override; -}; - -/// Construct a new Mach-O writer instance. -/// -/// This routine takes ownership of the target writer subclass. -/// -/// \param MOTW - The target specific Mach-O writer subclass. -/// \param OS - The stream to write to. -/// \returns The constructed object writer. -std::unique_ptr<MCObjectWriter> -createMachObjectWriter(std::unique_ptr<MCMachObjectTargetWriter> MOTW, - raw_pwrite_stream &OS, bool IsLittleEndian); - -} // end namespace llvm - -#endif // LLVM_MC_MCMACHOBJECTWRITER_H - -#ifdef __GNUC__ -#pragma GCC diagnostic pop -#endif + W(OS, IsLittleEndian ? support::little : support::big) {} + + support::endian::Writer W; + + const MCSymbol &findAliasedSymbol(const MCSymbol &Sym) const; + + /// \name Lifetime management Methods + /// @{ + + void reset() override; + + /// @} + + /// \name Utility Methods + /// @{ + + bool isFixupKindPCRel(const MCAssembler &Asm, unsigned Kind); + + SectionAddrMap &getSectionAddressMap() { return SectionAddress; } + + uint64_t getSectionAddress(const MCSection *Sec) const { + return SectionAddress.lookup(Sec); + } + uint64_t getSymbolAddress(const MCSymbol &S, const MCAsmLayout &Layout) const; + + uint64_t getFragmentAddress(const MCFragment *Fragment, + const MCAsmLayout &Layout) const; + + uint64_t getPaddingSize(const MCSection *SD, const MCAsmLayout &Layout) const; + + bool doesSymbolRequireExternRelocation(const MCSymbol &S); + + /// @} + + /// \name Target Writer Proxy Accessors + /// @{ + + bool is64Bit() const { return TargetObjectWriter->is64Bit(); } + bool isX86_64() const { + uint32_t CPUType = TargetObjectWriter->getCPUType(); + return CPUType == MachO::CPU_TYPE_X86_64; + } + + /// @} + + void writeHeader(MachO::HeaderFileType Type, unsigned NumLoadCommands, + unsigned LoadCommandsSize, bool SubsectionsViaSymbols); + + /// Write a segment load command. + /// + /// \param NumSections The number of sections in this segment. + /// \param SectionDataSize The total size of the sections. + void writeSegmentLoadCommand(StringRef Name, unsigned NumSections, + uint64_t VMAddr, uint64_t VMSize, + uint64_t SectionDataStartOffset, + uint64_t SectionDataSize, uint32_t MaxProt, + uint32_t InitProt); + + void writeSection(const MCAsmLayout &Layout, const MCSection &Sec, + uint64_t VMAddr, uint64_t FileOffset, unsigned Flags, + uint64_t RelocationsStart, unsigned NumRelocations); + + void writeSymtabLoadCommand(uint32_t SymbolOffset, uint32_t NumSymbols, + uint32_t StringTableOffset, + uint32_t StringTableSize); + + void writeDysymtabLoadCommand( + uint32_t FirstLocalSymbol, uint32_t NumLocalSymbols, + uint32_t FirstExternalSymbol, uint32_t NumExternalSymbols, + uint32_t FirstUndefinedSymbol, uint32_t NumUndefinedSymbols, + uint32_t IndirectSymbolOffset, uint32_t NumIndirectSymbols); + + void writeNlist(MachSymbolData &MSD, const MCAsmLayout &Layout); + + void writeLinkeditLoadCommand(uint32_t Type, uint32_t DataOffset, + uint32_t DataSize); + + void writeLinkerOptionsLoadCommand(const std::vector<std::string> &Options); + + // FIXME: We really need to improve the relocation validation. Basically, we + // want to implement a separate computation which evaluates the relocation + // entry as the linker would, and verifies that the resultant fixup value is + // exactly what the encoder wanted. This will catch several classes of + // problems: + // + // - Relocation entry bugs, the two algorithms are unlikely to have the same + // exact bug. + // + // - Relaxation issues, where we forget to relax something. + // + // - Input errors, where something cannot be correctly encoded. 'as' allows + // these through in many cases. + + // Add a relocation to be output in the object file. At the time this is + // called, the symbol indexes are not know, so if the relocation refers + // to a symbol it should be passed as \p RelSymbol so that it can be updated + // afterwards. If the relocation doesn't refer to a symbol, nullptr should be + // used. + void addRelocation(const MCSymbol *RelSymbol, const MCSection *Sec, + MachO::any_relocation_info &MRE) { + RelAndSymbol P(RelSymbol, MRE); + Relocations[Sec].push_back(P); + } + + void recordRelocation(MCAssembler &Asm, const MCAsmLayout &Layout, + const MCFragment *Fragment, const MCFixup &Fixup, + MCValue Target, uint64_t &FixedValue) override; + + void bindIndirectSymbols(MCAssembler &Asm); + + /// Compute the symbol table data. + void computeSymbolTable(MCAssembler &Asm, + std::vector<MachSymbolData> &LocalSymbolData, + std::vector<MachSymbolData> &ExternalSymbolData, + std::vector<MachSymbolData> &UndefinedSymbolData); + + void computeSectionAddresses(const MCAssembler &Asm, + const MCAsmLayout &Layout); + + void executePostLayoutBinding(MCAssembler &Asm, + const MCAsmLayout &Layout) override; + + bool isSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm, + const MCSymbol &A, + const MCSymbol &B, + bool InSet) const override; + + bool isSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm, + const MCSymbol &SymA, + const MCFragment &FB, bool InSet, + bool IsPCRel) const override; + + uint64_t writeObject(MCAssembler &Asm, const MCAsmLayout &Layout) override; +}; + +/// Construct a new Mach-O writer instance. +/// +/// This routine takes ownership of the target writer subclass. +/// +/// \param MOTW - The target specific Mach-O writer subclass. +/// \param OS - The stream to write to. +/// \returns The constructed object writer. +std::unique_ptr<MCObjectWriter> +createMachObjectWriter(std::unique_ptr<MCMachObjectTargetWriter> MOTW, + raw_pwrite_stream &OS, bool IsLittleEndian); + +} // end namespace llvm + +#endif // LLVM_MC_MCMACHOBJECTWRITER_H + +#ifdef __GNUC__ +#pragma GCC diagnostic pop +#endif |