PROFMOD_SZ
prof_modlist.size = PROFMODLIST_SZ + (n_modules - 1) * PROFMOD_SZ +
off_nxt = PROFMODLIST_SZ + PROFMOD_SZ;
off_path = PROFMODLIST_SZ + (n_modules - 1) * PROFMOD_SZ;
off_nxt += PROFMOD_SZ;
#define MOD_FILLER (PROFMOD_SZ - sizeof (ProfModule))