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📄 ArchHandler.cpp(4.36 KB)
📄 ArchHandler.h(12.86 KB)
📄 ArchHandler_arm.cpp(54.53 KB)
📄 ArchHandler_arm64.cpp(33.86 KB)
📄 ArchHandler_x86.cpp(24.04 KB)
📄 ArchHandler_x86_64.cpp(33.45 KB)
📄 Atoms.h(5.45 KB)
📄 CompactUnwindPass.cpp(21.9 KB)
📄 DebugInfo.h(2.52 KB)
📄 ExecutableAtoms.h(4.69 KB)
📄 File.h(17.28 KB)
📄 FlatNamespaceFile.h(1.87 KB)
📄 GOTPass.cpp(6.58 KB)
📄 LayoutPass.cpp(18.19 KB)
📄 LayoutPass.h(4.19 KB)
📄 MachOLinkingContext.cpp(33.61 KB)
📄 MachONormalizedFile.h(11.47 KB)
📄 MachONormalizedFileBinaryReader.cpp(22.82 KB)
📄 MachONormalizedFileBinaryUtils.h(6.93 KB)
📄 MachONormalizedFileBinaryWriter.cpp(56.33 KB)
📄 MachONormalizedFileFromAtoms.cpp(61.05 KB)
📄 MachONormalizedFileToAtoms.cpp(65.46 KB)
📄 MachONormalizedFileYAML.cpp(31.45 KB)
📄 MachOPasses.h(1.11 KB)
📄 ObjCPass.cpp(3.54 KB)
📄 SectCreateFile.h(3.01 KB)
📄 ShimPass.cpp(4.59 KB)
📄 StubsPass.cpp(12.03 KB)
📄 TLVPass.cpp(4.02 KB)
📄 WriterMachO.cpp(2.33 KB)

Editing: Atoms.h

//===- lib/ReaderWriter/MachO/Atoms.h ---------------------------*- 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 LLD_READER_WRITER_MACHO_ATOMS_H
#define LLD_READER_WRITER_MACHO_ATOMS_H

#include "lld/Core/Atom.h"
#include "lld/Core/DefinedAtom.h"
#include "lld/Core/SharedLibraryAtom.h"
#include "lld/Core/Simple.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include <cstdint>
#include <string>

namespace lld {

class File;

namespace mach_o {

class MachODefinedAtom : public SimpleDefinedAtom {
public:
  MachODefinedAtom(const File &f, const StringRef name, Scope scope,
                   ContentType type, Merge merge, bool thumb, bool noDeadStrip,
                   const ArrayRef<uint8_t> content, Alignment align)
      : SimpleDefinedAtom(f), _name(name), _content(content),
        _align(align), _contentType(type), _scope(scope), _merge(merge),
        _thumb(thumb), _noDeadStrip(noDeadStrip) {}

// Constructor for zero-fill content
  MachODefinedAtom(const File &f, const StringRef name, Scope scope,
                   ContentType type, uint64_t size, bool noDeadStrip,
                   Alignment align)
      : SimpleDefinedAtom(f), _name(name),
        _content(ArrayRef<uint8_t>(nullptr, size)), _align(align),
        _contentType(type), _scope(scope), _merge(mergeNo), _thumb(false),
        _noDeadStrip(noDeadStrip) {}

~MachODefinedAtom() override = default;

uint64_t size() const override { return _content.size(); }

ContentType contentType() const override { return _contentType; }

Alignment alignment() const override { return _align; }

StringRef name() const override { return _name; }

Scope scope() const override { return _scope; }

Merge merge() const override { return _merge; }

DeadStripKind deadStrip() const override {
    if (_contentType == DefinedAtom::typeInitializerPtr)
      return deadStripNever;
    if (_contentType == DefinedAtom::typeTerminatorPtr)
      return deadStripNever;
    if (_noDeadStrip)
      return deadStripNever;
    return deadStripNormal;
  }

ArrayRef<uint8_t> rawContent() const override {
    // Note: Zerofill atoms have a content pointer which is null.
    return _content;
  }

bool isThumb() const { return _thumb; }

private:
  const StringRef _name;
  const ArrayRef<uint8_t> _content;
  const DefinedAtom::Alignment _align;
  const ContentType _contentType;
  const Scope _scope;
  const Merge _merge;
  const bool _thumb;
  const bool _noDeadStrip;
};

class MachODefinedCustomSectionAtom : public MachODefinedAtom {
public:
  MachODefinedCustomSectionAtom(const File &f, const StringRef name,
                                Scope scope, ContentType type, Merge merge,
                                bool thumb, bool noDeadStrip,
                                const ArrayRef<uint8_t> content,
                                StringRef sectionName, Alignment align)
      : MachODefinedAtom(f, name, scope, type, merge, thumb, noDeadStrip,
                         content, align),
        _sectionName(sectionName) {}

~MachODefinedCustomSectionAtom() override = default;

SectionChoice sectionChoice() const override {
    return DefinedAtom::sectionCustomRequired;
  }

StringRef customSectionName() const override {
    return _sectionName;
  }
private:
  StringRef _sectionName;
};

class MachOTentativeDefAtom : public SimpleDefinedAtom {
public:
  MachOTentativeDefAtom(const File &f, const StringRef name, Scope scope,
                        uint64_t size, DefinedAtom::Alignment align)
      : SimpleDefinedAtom(f), _name(std::string(name)), _scope(scope),
        _size(size), _align(align) {}

~MachOTentativeDefAtom() override = default;

uint64_t size() const override { return _size; }

Merge merge() const override { return DefinedAtom::mergeAsTentative; }

ContentType contentType() const override { return DefinedAtom::typeZeroFill; }

Alignment alignment() const override { return _align; }

StringRef name() const override { return _name; }

Scope scope() const override { return _scope; }

ArrayRef<uint8_t> rawContent() const override { return ArrayRef<uint8_t>(); }

private:
  const std::string _name;
  const Scope _scope;
  const uint64_t _size;
  const DefinedAtom::Alignment _align;
};

class MachOSharedLibraryAtom : public SharedLibraryAtom {
public:
  MachOSharedLibraryAtom(const File &file, StringRef name,
                         StringRef dylibInstallName, bool weakDef)
      : SharedLibraryAtom(), _file(file), _name(name),
        _dylibInstallName(dylibInstallName) {}
  ~MachOSharedLibraryAtom() override = default;

StringRef loadName() const override { return _dylibInstallName; }

bool canBeNullAtRuntime() const override {
    // FIXME: this may actually be changeable. For now, all symbols are strongly
    // defined though.
    return false;
  }

const File &file() const override { return _file; }

StringRef name() const override { return _name; }

Type type() const override {
    // Unused in MachO (I think).
    return Type::Unknown;
  }

uint64_t size() const override {
    // Unused in MachO (I think)
    return 0;
  }

private:
  const File &_file;
  StringRef _name;
  StringRef _dylibInstallName;
};

} // end namespace mach_o
} // end namespace lld

#endif // LLD_READER_WRITER_MACHO_ATOMS_H

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