BindingInfo.hpp

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/* Copyright 2017 - 2025 R. Thomas
 * Copyright 2017 - 2025 Quarkslab
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef LIEF_MACHO_BINDING_INFO_H
#define LIEF_MACHO_BINDING_INFO_H
#include <ostream>
#include <cstdint>
 
#include "LIEF/visibility.h"
#include "LIEF/Object.hpp"
 
namespace LIEF {
namespace MachO {
class DylibCommand;
class SegmentCommand;
class Symbol;
class BinaryParser;
class DyldChainedFixupsCreator;

class LIEF_API BindingInfo : public Object {
 
  friend class BinaryParser;
  friend class DyldChainedFixupsCreator;
 
  public:
  enum class TYPES {
    UNKNOWN = 0,
    DYLD_INFO,       
    CHAINED,         
    CHAINED_LIST,    
    INDIRECT_SYMBOL, 
  };
 
  BindingInfo() = default;
  BindingInfo(const BindingInfo& other);
  BindingInfo& operator=(const BindingInfo& other);
 
  BindingInfo(BindingInfo&&) noexcept = default;
  BindingInfo& operator=(BindingInfo&&) noexcept = default;
 
  void swap(BindingInfo& other) noexcept;

  bool has_segment() const {
    return segment_ != nullptr;
  }

  const SegmentCommand* segment() const {
    return segment_;
  }
  SegmentCommand* segment() {
    return segment_;
  }

  bool has_library() const {
    return library_ != nullptr;
  }

  const DylibCommand* library() const {
    return library_;
  }
  DylibCommand* library() {
    return library_;
  }

  bool has_symbol() const {
    return symbol_ != nullptr;
  }

  const Symbol* symbol() const {
    return symbol_;
  }
  Symbol* symbol() {
    return symbol_;
  }

  virtual uint64_t address() const {
    return address_;
  }
 
  virtual void address(uint64_t addr) {
    address_ = addr;
  }
 
  int32_t library_ordinal() const {
    return library_ordinal_;
  }
 
  void library_ordinal(int32_t ordinal) {
    library_ordinal_ = ordinal;
  }

  int64_t addend() const {
    return addend_;
  }
 
  void addend(int64_t addend) {
    addend_ = addend;
  }
 
  bool is_weak_import() const {
    return is_weak_import_;
  }
 
  void set_weak_import(bool val = true) {
    is_weak_import_ = val;
  }

  virtual TYPES type() const = 0;
 
  ~BindingInfo() override = default;
 
  void accept(Visitor& visitor) const override;
 
  template<class T>
  const T* cast() const {
    static_assert(std::is_base_of<BindingInfo, T>::value, "Require BindingInfo inheritance");
    if (T::classof(this)) {
      return static_cast<const T*>(this);
    }
    return nullptr;
  }
 
  template<class T>
  T* cast() {
    return const_cast<T*>(static_cast<const BindingInfo*>(this)->cast<T>());
  }
 
  LIEF_API friend std::ostream& operator<<(std::ostream& os, const BindingInfo& binding_info);
 
  protected:
  SegmentCommand* segment_ = nullptr;
  Symbol*         symbol_ = nullptr;
  int32_t         library_ordinal_ = 0;
  int64_t         addend_ = 0;
  bool            is_weak_import_ = false;
  DylibCommand*   library_ = nullptr;
  uint64_t        address_ = 0;
};
 
}
}
#endif