FPO.hpp

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/* Copyright 2017 - 2026 R. Thomas
 * Copyright 2017 - 2026 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_PE_FPO_H
#define LIEF_PE_FPO_H
 
#include <vector>
#include "LIEF/iterators.hpp"
#include "LIEF/visibility.h"
#include "LIEF/PE/debug/Debug.hpp"
 
namespace LIEF {
namespace PE {

class LIEF_API FPO : public Debug {
  public:
  enum class FRAME_TYPE {
    FPO = 0,
    TRAP = 1,
    TSS = 2,
    NON_FPO = 3,
  };

  struct LIEF_API entry_t {
    uint32_t rva = 0;

    uint32_t proc_size = 0;

    uint32_t nb_locals = 0;

    uint32_t parameters_size = 0;

    uint16_t prolog_size = 0;

    uint16_t nb_saved_regs = 0;

    bool use_seh = false;

    bool use_bp = false;

    uint16_t reserved = 0;

    FRAME_TYPE type = FRAME_TYPE::FPO;
 
    std::string to_string() const;
 
    friend LIEF_API std::ostream& operator<<(std::ostream& os,
                                             const entry_t& entry) {
      os << entry.to_string();
      return os;
    }
  };
 
  using entries_t = std::vector<entry_t>;
  using it_entries = ref_iterator<entries_t&>;
  using it_const_entries = const_ref_iterator<const entries_t&>;
 
  static std::unique_ptr<FPO> parse(const details::pe_debug& hdr, Section* section,
                                    span<uint8_t> payload);
 
  FPO(const details::pe_debug& hdr, Section* section) :
    Debug(hdr, section) {}
 
  FPO(const FPO& other) = default;
  FPO& operator=(const FPO& other) = default;
 
  FPO(FPO&&) = default;
  FPO& operator=(FPO&& other) = default;
 
  std::unique_ptr<Debug> clone() const override {
    return std::unique_ptr<Debug>(new FPO(*this));
  }

  it_const_entries entries() const {
    return entries_;
  }
 
  it_entries entries() {
    return entries_;
  }
 
  static bool classof(const Debug* debug) {
    return debug->type() == Debug::TYPES::FPO;
  }
 
  ~FPO() override = default;
 
  std::string to_string() const override;
 
  private:
  entries_t entries_;
};
 
LIEF_API const char* to_string(FPO::FRAME_TYPE e);
 
}
}
 
#endif