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elf.hpp
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elf.hpp
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/*
* Copyright (c) 2019 by flomesh.io
*
* Unless prior written consent has been obtained from the copyright
* owner, the following shall not be allowed.
*
* 1. The distribution of any source codes, header files, make files,
* or libraries of the software.
*
* 2. Disclosure of any source codes pertaining to the software to any
* additional parties.
*
* 3. Alteration or removal of any notices in or on the software or
* within the documentation included within the software.
*
* ALL SOURCE CODE AS WELL AS ALL DOCUMENTATION INCLUDED WITH THIS
* SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION, WITHOUT WARRANTY OF ANY
* KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef ELF_HPP
#define ELF_HPP
#include <string>
#include <vector>
#include <map>
#include <memory>
namespace pipy {
//
// ELF
//
class ELF {
public:
//
// ELF::Section
//
struct Section {
std::string name;
int type;
int flags;
const uint8_t *data;
size_t size;
size_t addr;
size_t addralign;
int link;
int info;
};
//
// ELF::Symbol
//
struct Symbol {
std::string name;
size_t value;
size_t size;
size_t shndx;
int type;
int bind;
int visibility;
};
//
// ELF::Relocation
//
struct Relocation {
//
// ELF::Relocation::Entry
//
struct Entry {
size_t offset;
int sym;
int type;
};
size_t section;
std::vector<Entry> entries;
};
int type;
int flags;
int machine;
int version;
size_t entry;
std::vector<Section> sections;
std::vector<Symbol> symbols;
std::vector<Relocation> relocations;
ELF(std::vector<uint8_t> &&data);
auto string(size_t offset) const -> std::string;
private:
std::vector<uint8_t> m_data;
size_t m_str_tab_idx;
};
//
// BTF
//
class BTF {
public:
//
// BTF::Type
//
struct Type {
std::string name;
int kind;
int kind_flag;
union {
size_t type;
size_t size;
};
virtual ~Type() {}
};
//
// BTF::Member
//
struct Member {
std::string name;
size_t type;
size_t offset;
};
//
// BTF::Param
//
struct Param {
std::string name;
size_t type;
};
//
// BTF::VarSecInfo
//
struct VarSecInfo {
size_t type;
size_t offset;
size_t size;
};
//
// BTF::Int
//
struct Int : public Type {
size_t offset;
size_t bits;
bool is_signed;
bool is_char;
bool is_bool;
};
//
// BTF::Array
//
struct Array : public Type {
size_t elem_type;
size_t index_type;
size_t nelems;
};
//
// BTF::Struct
//
struct Struct : public Type {
std::vector<Member> members;
};
//
// BTF::Enum
//
struct Enum : public Type {
std::map<std::string, int> values;
};
//
// BTF::FuncProto
//
struct FuncProto : public Type {
std::vector<Param> params;
};
//
// BTF::Var
//
struct Var : public Type {
int linkage;
};
//
// BTF::DataSec
//
struct DataSec : public Type {
std::vector<VarSecInfo> vars;
};
std::vector<std::unique_ptr<Type>> types;
BTF(const ELF &elf, size_t sec);
};
} // namespace pipy
#endif // ELF_HPP