Theodosius/src/theo.cpp

// Copyright (c) 2022, _xeroxz
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// 1. Redistributions of source code must retain the above copyright notice,
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#include <theo.hpp>

namespace theo {
theo_t::theo_t(std::vector<std::uint8_t>& lib,
               lnk_fns_t lnkr_fns,
               const std::string&& entry_sym)
    : m_dcmp(lib, &m_sym_tbl),
      m_recmp(&m_dcmp, {}, {}, {}),
      m_entry_sym(entry_sym) {
  m_recmp.allocator(std::get<0>(lnkr_fns));
  m_recmp.copier(std::get<1>(lnkr_fns));
  m_recmp.resolver(std::get<2>(lnkr_fns));
}

std::optional<std::uint32_t> theo_t::decompose() {
  auto res = m_dcmp.decompose(m_entry_sym);
  if (!res.has_value()) {
    spdlog::error("failed to decompose...\n");
    return {};
  }

  spdlog::info("decompose successful... {} symbols", res.value()->size());
  return res.value()->size();
}

std::uintptr_t theo_t::compose() {
  auto engine = obf::engine_t::get();
  auto& sym_tbl = m_sym_tbl.get();

  // run obfuscation engine on function symbols...
  //
  m_sym_tbl.for_each([&](decomp::symbol_t& sym) {
    engine->for_each(&sym, [&](decomp::symbol_t* sym, obf::pass_t* pass) {
      if (sym->type() == decomp::sym_type_t::function)
        pass->generic_pass(sym, sym_tbl);
    });
  });

  // run obfuscation engine on instruction symbols...
  //
  m_sym_tbl.for_each([&](decomp::symbol_t& sym) {
    engine->for_each(&sym, [&](decomp::symbol_t* sym, obf::pass_t* pass) {
      if (sym->type() == decomp::sym_type_t::instruction)
        pass->generic_pass(sym, sym_tbl);
    });
  });

  // run obfuscation engine on all other symbols...
  //
  m_sym_tbl.for_each([&](decomp::symbol_t& sym) {
    engine->for_each(&sym, [&](decomp::symbol_t* sym, obf::pass_t* pass) {
      if (sym->type() != decomp::sym_type_t::instruction &&
          sym->type() != decomp::sym_type_t::function)
        pass->generic_pass(sym, sym_tbl);
    });
  });

  m_recmp.allocate();
  m_recmp.resolve();
  m_recmp.copy_syms();
  return m_recmp.resolve(m_entry_sym.data());
}

std::uintptr_t theo_t::resolve(const std::string&& sym) {
  auto val = m_sym_tbl.sym_from_hash(decomp::symbol_t::hash(sym));
  if (!val.has_value())
    return {};

  return val.value()->allocated_at();
}
}  // namespace theo