int __fastcall PeiServiceGetBootMode(int n88, int n768)
{
  int PeiServices; // eax
  int v5; // [esp+4h] [ebp-8h] BYREF

  if ( n768
    && (PeiServices = PeiGetPeiServices(),
        (*(int (__cdecl **)(int, int, int, int *))(*(_DWORD *)PeiServices + 72))(PeiServices, 4, n768, &v5) >= 0) )
  {
    return v5;
  }
  else
  {
    return 0;
  }
}