print_frame
print_frame(ucp->uc_mcontext.gregs[REG_PC], i++);
print_frame(fr->fr_savpc, i++);
print_frame(fr->fr_savpc, frnum, safe);
static int print_frame(void *, prgregset_t, uint_t, const long *);
(void) Pstack_iter(h->proc, reg, print_frame, h);