tf_ctr
iac2 = tf->tf_ctr;
tf->tf_lr, tf->tf_ctr, tf->tf_cr, tf->tf_xer);
tf->tf_ctr = sc.sc_frame.ctr;
utf->ctr = tf->tf_ctr;
tf->tf_ctr = utf->ctr;
DDB_REGS->ctr = tf->tf_ctr;
tf->tf_ctr = DDB_REGS->ctr;
tf->tf_lr, tf->tf_cr, tf->tf_xer, tf->tf_ctr);
R(&tf->tf_ctr));
va[1] = tf->tf_ctr;
regs->ctr = tf->tf_ctr;
tf->tf_ctr = regs->ctr;
gr[_REG_CTR] = tf->tf_ctr;
tf->tf_ctr = gr[_REG_CTR];
linux_regs.lctr = tf->tf_ctr;
tf->tf_ctr = lregs->lctr;
tf->tf_ctr = lregs->lctr;