ChainedBindingInfo.hpp

/* 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_CHAINED_BINDING_INFO_H
#define LIEF_MACHO_CHAINED_BINDING_INFO_H
#include <ostream>
 
#include "LIEF/visibility.h"
#include "LIEF/MachO/BindingInfo.hpp"
#include "LIEF/MachO/DyldChainedFormat.hpp"
 
namespace LIEF {
namespace MachO {
class Symbol;
class BinaryParser;
class Builder;
 
namespace details {
struct dyld_chained_ptr_arm64e_bind;
struct dyld_chained_ptr_arm64e_auth_bind;
struct dyld_chained_ptr_arm64e_bind24;
struct dyld_chained_ptr_arm64e_auth_bind24;
struct dyld_chained_ptr_64_bind;
struct dyld_chained_ptr_32_bind;
}
 
class LIEF_API ChainedBindingInfo : public BindingInfo {
 
  friend class BinaryParser;
  friend class Builder;
 
  public:
 
  ChainedBindingInfo() = delete;
  explicit ChainedBindingInfo(DYLD_CHAINED_FORMAT fmt, bool is_weak);
 
  ChainedBindingInfo& operator=(ChainedBindingInfo other);
  ChainedBindingInfo(const ChainedBindingInfo& other);
  ChainedBindingInfo(ChainedBindingInfo&&) noexcept;
 
  void swap(ChainedBindingInfo& other) noexcept;
 
  DYLD_CHAINED_FORMAT format() const {
    return format_;
  }
 
  DYLD_CHAINED_PTR_FORMAT ptr_format() const {
    return ptr_format_;
  }
 
  uint32_t offset() const {
    return offset_;
  }
 
  void offset(uint32_t offset) {
    offset_ = offset;
  }
 
  uint64_t address() const override {
    return /* imagebase */ address_ + offset_;
  }
 
  void address(uint64_t address) override {
    offset_ = address - /* imagebase */ address_;
  }
 
  uint64_t sign_extended_addend() const;
 
  BindingInfo::TYPES type() const override {
    return BindingInfo::TYPES::CHAINED;
  }
 
  static bool classof(const BindingInfo* info) {
    return info->type() == BindingInfo::TYPES::CHAINED;
  }
 
  ~ChainedBindingInfo() override {
    clear();
  }
 
  void accept(Visitor& visitor) const override;
 
  LIEF_API friend
  std::ostream& operator<<(std::ostream& os, const ChainedBindingInfo& info) {
    os << static_cast<const BindingInfo&>(info);
    return os;
  }
 
  private:
  void clear();
  enum class BIND_TYPES {
    UNKNOWN = 0,
 
    ARM64E_BIND,
    ARM64E_AUTH_BIND,
 
    ARM64E_BIND24,
    ARM64E_AUTH_BIND24,
 
    PTR64_BIND,
    PTR32_BIND,
  };
 
  void set(const details::dyld_chained_ptr_arm64e_bind& bind);
  void set(const details::dyld_chained_ptr_arm64e_auth_bind& bind);
  void set(const details::dyld_chained_ptr_arm64e_bind24& bind);
  void set(const details::dyld_chained_ptr_arm64e_auth_bind24& bind);
  void set(const details::dyld_chained_ptr_64_bind& bind);
  void set(const details::dyld_chained_ptr_32_bind& bind);
 
  DYLD_CHAINED_FORMAT format_;
  DYLD_CHAINED_PTR_FORMAT ptr_format_;
  uint32_t offset_ = 0;
 
  BIND_TYPES btypes_ = BIND_TYPES::UNKNOWN;
 
  union {
    details::dyld_chained_ptr_arm64e_bind*        arm64_bind_ = nullptr;
    details::dyld_chained_ptr_arm64e_auth_bind*   arm64_auth_bind_;
    details::dyld_chained_ptr_arm64e_bind24*      arm64_bind24_;
    details::dyld_chained_ptr_arm64e_auth_bind24* arm64_auth_bind24_;
    details::dyld_chained_ptr_64_bind*            p64_bind_;
    details::dyld_chained_ptr_32_bind*            p32_bind_;
  };
};
 
}
}
#endif