dt_idstack_push
extern void dt_idstack_push(dt_idstack_t *, dt_idhash_t *);
dt_idstack_push(&yypcb->pcb_globals, inp->din_hash);
dt_idstack_push(&yypcb->pcb_globals, dxp->dx_locals);
dt_idstack_push(&pcb->pcb_globals, dtp->dt_globals);