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Security method making deterministic real time execution of multitask applications of control and command type with error confinement

机译:确定性实时执行具有错误限制的控制和命令类型的多任务应用程序的安全方法

摘要

The method is implemented with a management system of the time-triggered architecture type in association with a processor of a central processor unit that possesses a privileged execution mode to which access is protected by an instruction of the “call to system layer” type. The only system layer call that is authorized from an application task under consideration to the system layer consists in reporting a change of node in the control graph of the task in question. When the system layer has verified that the call is legal relative to the execution paths of the control graph as described in the constant tables of the application, all of the operations to be performed on the node in question by the system layer are predetermined by the constant tables of the application associated with the system layer. Prior to real-time execution, pre-ordering of the lists of tasks of an application under consideration is performed in a micro-kernel, which subsequently ensures, when called by the system layer during real-time execution, that task lists are updated in ordered manner depending on the new time characteristics of the tasks, specifically their earliest start times d(i) and their latest finish times f(i) as calculated by the system layer.
机译:该方法由时间触发架构类型的管理系统与中央处理器单元的处理器相关联来实现,该中央处理器单元具有特权执行模式,通过“调用系统层”类型的指令来保护对其的访问。从正在考虑的应用程序任务向系统层授权的唯一系统层调用包括报告所讨论任务的控制图中的节点更改。如应用程序的常量表中所述,当系统层已验证该调用相对于控制图的执行路径是合法的时,系统层将在所讨论的节点上执行的所有操作都由系统预先确定。与系统层关联的应用程序的常量表。在实时执行之前,要在微内核中对正在考虑的应用程序的任务列表进行预排序,这样可以确保在实时执行期间被系统层调用时,在其中更新任务列表。有序的方式取决于任务的新时间特性,尤其是系统层计算出的最早的开始时间d(i)和最晚的完成时间f(i)。

著录项

  • 公开/公告号US7299383B2

    专利类型

  • 公开/公告日2007-11-20

    原文格式PDF

  • 申请/专利权人 VINCENT DAVID;JEAN DELCOIGNE;

    申请/专利号US20030416564

  • 发明设计人 VINCENT DAVID;JEAN DELCOIGNE;

    申请日2001-11-13

  • 分类号G06F11/00;

  • 国家 US

  • 入库时间 2022-08-21 20:09:39

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