发明授权
US4809160A Privilege level checking instruction for implementing a secure
hierarchical computer system
失效
用于实施安全分级计算机系统的权限级别检查指令
- 专利标题： Privilege level checking instruction for implementing a secure hierarchical computer system
- 专利标题（中）： 用于实施安全分级计算机系统的权限级别检查指令
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申请号： US792702申请日： 1985-10-28
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公开(公告)号： US4809160A公开(公告)日： 1989-02-28
- 发明人: Michael J. Mahon , Allen Baum , William R. Bryg , Terrence C. Miller
- 申请人： Michael J. Mahon , Allen Baum , William R. Bryg , Terrence C. Miller
- 申请人地址： CA Palo Alto
- 专利权人： Hewlett-Packard Company
- 当前专利权人： Hewlett-Packard Company
- 当前专利权人地址： CA Palo Alto
- 主分类号： G06F12/14
- IPC分类号： G06F12/14 ; G06F9/455 ; G06F9/46 ; G06F11/00 ; G06F21/24
摘要：
A low overhead way for insuring that only routines of sufficient privilege can execute on a secured page of memory in an hierarchial computer system, and for raising the privilege level of a low privilege process in an orderly and secure way is presented. This is done through the execution of a single "gateway" branch instruction standing between a procedure call by a lower privileged routine, such as a user program, and an operating system itself.
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