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    • 8. 发明授权
    • Multi-user data processing system with storage protection
    • 具有存储保护功能的多用户数据处理系统
    • US5991858A
    • 1999-11-23
    • US913280
    • 1997-12-31
    • Markus Weinlander
    • Markus Weinlander
    • G06F12/14
    • G06F12/1441
    • A data processor is adapted, in particular with respect to the microcode, in such a way that the execution of standard commands of the processor which are loaded in a user memory area and request reading or writing access to the content of memory cells is inhibited. In the operating system memory area there is a memory area access table, in which there is stored the address area authorized per user memory area for the commands there. Finally, there is an additional program routine which is called up by a command loaded in a user memory area and requesting reading or writing access to a memory cell, and checks by means of the memory area access table (before execution) whether the requested access to a memory cell lies in the authorized address area. If it does not lie in the authorized address area, the additional program routine inhibits the execution of the command. The invention has the advantage that the "radius of action" of one or more application programs in the user program memory area can be restricted in a simple way.
    • PCT No.PCT / DE96 / 00407 Sec。 371日期1997年12月31日 102(e)1997年12月31日PCT PCT 1996年3月7日PCT公布。 公开号WO96 / 28782 日期1996年9月19日数据处理器特别是相对于微代码来适应,使得处理器的标准命令的执行被加载到用户存储区域中,并请求读取或写入对 记忆细胞被抑制。 在操作系统存储器区域中存在一个存储器区域访问表,其中存储有用于每个用户存储区域的命令的地址区域。 最后,还有一个附加的程序例程,由一个加载在用户存储区域中的命令调用,并请求对存储单元进行读取或写入访问,并通过存储器区域访问表(执行前)检查所请求的访问 到存储器单元位于授权的地址区域中。 如果它不在授权的地址区域,则附加程序例程禁止执行命令。 本发明的优点在于可以以简单的方式限制用户程序存储区域中的一个或多个应用程序的“动作的半径”。