mdb_tgt_add_vwapt
id = mdb_tgt_add_vwapt(mdb.m_target, addr, size, opt_rwx,
if (mdb_tgt_add_vwapt(mdb.m_target, addr, mdb.m_dcount, rwx, 0,
extern int mdb_tgt_add_vwapt(mdb_tgt_t *, uintptr_t, size_t, uint_t,