PF_ANCHOR_STACK_MAX
if (depth > PF_ANCHOR_STACK_MAX) {
stack[PF_ANCHOR_STACK_MAX].sf_stack_top = &stack[0];
rv = (sf == &stack[PF_ANCHOR_STACK_MAX]);
top_sf = stack[PF_ANCHOR_STACK_MAX].sf_stack_top;
if ((top_sf <= &stack[0]) || (top_sf >= &stack[PF_ANCHOR_STACK_MAX]))
stack[PF_ANCHOR_STACK_MAX].sf_stack_top = top_sf;
(top_sf >= &stack[PF_ANCHOR_STACK_MAX]))
stack[PF_ANCHOR_STACK_MAX].sf_stack_top = top_sf;
sizeof(struct pf_anchor_stackframe) * (PF_ANCHOR_STACK_MAX + 2),
sf[PF_ANCHOR_STACK_MAX].sf_stack_top = &sf[0];
if (pf_tcount[pf_unit2idx(unit)] >= (PF_ANCHOR_STACK_MAX * 8))