DR_STEP
if (condition & DR_STEP)
if (bpx && (dr6 & DR_STEP))
(*(unsigned long *)ERR_PTR(args->err)) &= ~DR_STEP;
(dr6 & DR_STEP) && is_sysenter_singlestep(regs))
dr6 &= ~DR_STEP;
if (WARN_ON_ONCE(dr6 & DR_STEP))
current->thread.virtual_dr6 = (dr6 & DR_STEP);
if (dr6 & (DR_STEP | DR_TRAP_BITS) || icebp)
if (val == DIE_DEBUG && (*dr6_p & DR_STEP))
*dr6_p &= ~DR_STEP;