ExportInfo.hpp

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/* Copyright 2017 - 2024 R. Thomas
 * Copyright 2017 - 2024 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_EXPORT_INFO_COMMAND_H
#define LIEF_MACHO_EXPORT_INFO_COMMAND_H
#include <vector>
#include <ostream>
#include <cstdint>
 
#include "LIEF/visibility.h"
#include "LIEF/enums.hpp"
#include "LIEF/Object.hpp"
 
namespace LIEF {
namespace MachO {
 
class BinaryParser;
class Symbol;
class DylibCommand;
class Binary;
 
class LIEF_API ExportInfo : public Object {
 
  friend class BinaryParser;
  friend class Binary;
 
  public:
  enum class KIND: uint64_t  {
    REGULAR           = 0x00u,
    THREAD_LOCAL_KIND = 0x01u,
    ABSOLUTE_KIND     = 0x02u
  };
 
  enum class FLAGS: uint64_t  {
    WEAK_DEFINITION     = 0x04u,
    REEXPORT            = 0x08u,
    STUB_AND_RESOLVER   = 0x10u
  };
 
  using flag_list_t = std::vector<FLAGS>;
 
  ExportInfo() = default;
  ExportInfo(uint64_t address, uint64_t flags, uint64_t offset = 0) :
    node_offset_(offset),
    flags_(flags),
    address_(address)
  {}
 
  ExportInfo& operator=(ExportInfo copy);
  ExportInfo(const ExportInfo& copy);
  void swap(ExportInfo& other) noexcept;
 
  uint64_t node_offset() const {
    return node_offset_;
  }
 
  uint64_t flags() const {
    return flags_;
  }
 
  void flags(uint64_t flags) {
    flags_ = flags;
  }
 
  flag_list_t flags_list() const;
 
  bool has(FLAGS flag) const;
 
  KIND kind() const {
    static constexpr auto MASK = uint64_t(3);
    return KIND(flags_ & MASK);
  }
 
  uint64_t other() const {
    return other_;
  }
 
  uint64_t address() const {
    return address_;
  }
  void address(uint64_t addr) {
    address_ = addr;
  }
 
  bool has_symbol() const {
    return symbol() != nullptr;
  }
 
  const Symbol* symbol() const {
    return symbol_;
  }
  Symbol* symbol() {
    return symbol_;
  }
 
  Symbol* alias() {
    return alias_;
  }
  const Symbol* alias() const {
    return alias_;
  }
 
  DylibCommand* alias_library() {
    return alias_location_;
  }
  const DylibCommand* alias_library() const {
    return alias_location_;
  }
 
  ~ExportInfo() override = default;
 
  void accept(Visitor& visitor) const override;
 
  LIEF_API friend std::ostream& operator<<(std::ostream& os, const ExportInfo& export_info);
 
  private:
  uint64_t node_offset_ = 0;
  uint64_t flags_ = 0;
  uint64_t address_ = 0;
  uint64_t other_ = 0;
  Symbol* symbol_ = nullptr;
 
  Symbol* alias_ = nullptr;
  DylibCommand* alias_location_ = nullptr;
};
 
LIEF_API const char* to_string(ExportInfo::KIND kind);
LIEF_API const char* to_string(ExportInfo::FLAGS flags);
 
}
}
 
ENABLE_BITMASK_OPERATORS(LIEF::MachO::ExportInfo::FLAGS);
 
#endif