2.4.ReactOS系统提升IRQL级别KfRaiseIrql 函数

2.4.ReactOS系统提升IRQL级别KfRaiseIrql 函数

2.4.ReactOS系统提升IRQL级别KfRaiseIrql 函数

文章目录

• [2.4.ReactOS系统提升IRQL级别KfRaiseIrql 函数](#2.4.ReactOS系统提升IRQL级别KfRaiseIrql 函数)
• [KfRaiseIrql 函数](#KfRaiseIrql 函数)

---

KfRaiseIrql 函数

/**********************************************************************
 * NAME							EXPORTED
 *	KfRaiseIrql
 *
 * DESCRIPTION
 *	Raises the hardware priority (irql)
 *
 * ARGUMENTS
 *	NewIrql = Irql to raise to
 *
 * RETURN VALUE
 *	previous irq level
 *
 * NOTES
 *	Uses fastcall convention
 */

KIRQL FASTCALL
KfRaiseIrql (KIRQL	NewIrql)
{
  KIRQL OldIrql;
  
  DPRINT("KfRaiseIrql(NewIrql %d)\n", NewIrql);
  
  if (NewIrql < KeGetPcr()->Irql)
    {
      DbgPrint ("%s:%d CurrentIrql %x NewIrql %x\n",
		__FILE__,__LINE__,KeGetPcr()->Irql,NewIrql);
      KEBUGCHECK (0);
      for(;;);
    }
  
  OldIrql = KeGetPcr()->Irql;
  KeGetPcr()->Irql = NewIrql;
  return OldIrql;
}

另一篇文中中有方法降低IRQL级别，和切换IRQL级别