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1. 发明申请

WO1998025205A1 SYSTEM AND METHOD FOR PERFORMING SOFTWARE PATCHES IN EMBEDDED SYSTEMS 审中-公开
标题翻译：用于在嵌入式系统中执行软件锁的系统和方法
公开(公告)号：WO1998025205A1
公开(公告)日：1998-06-11
申请号：PCT/US1997023143
申请日：1997-12-04
申请人： ADVANCED MICRO DEVICES, INC.
发明人： ADVANCED MICRO DEVICES, INC. , IRETON, Mark, A. , CHAMPAGNE, Gerald , MARLER, Corbett, A.
IPC分类号： G06F11/20
CPC分类号： G06F9/328 , G06F8/66
摘要： A system and method for performing software patches for embedded system devices in which the firmware of the system is included in non-alterable storage of the device. The patch mechanism provides a means for finding firmware errors, prototyping fixes to the errors and/or prototyping new functionality of the firmware of the embbeded system. The system comprises an embedded system device coupled to an external memory. The device includes a non-alterable memory, including firmware, coupled to a processor. The device further includes a relatively small amount of patch RAM within the device also coupled to the processor. The patches are loaded from the external memory into the patch RAM. The device further includes a means for determining if one or more patches are to be applied. If the device detects a patch to be applied, the system loads the patch from the external memory into the patch RAM. The device also includes a breakpoint register. When the value of the program counter of the processor equals the value in the breakpoint register, a patch insertion occurs, i.e., the processor deviates from executing firmware to executing patch instructions. Preferably, the embedded system device comprises a single integrated circuit. The processor may include a plurality of breakpoint registers. The patch may be encrypted for increased security. Multiple patches may be chained together, and run-time patch replacement is contemplated.
摘要翻译：一种用于对嵌入式系统设备执行软件补丁的系统和方法，其中所述系统的固件被包括在所述设备的不可更改存储器中。补丁机制提供了一种用于查找固件错误，原型修复错误和/或原型化嵌入式系统固件的新功能的方法。该系统包括耦合到外部存储器的嵌入式系统设备。该设备包括耦合到处理器的不可更改的存储器，包括固件。该设备还包括在设备内的相对少量的补丁RAM，其也耦合到处理器。补丁从外部存储器加载到补丁RAM中。该装置还包括用于确定是否应用一个或多个补丁的装置。如果设备检测到要应用的补丁，则系统将补丁从外部存储器加载到补丁RAM中。该器件还包括一个断点寄存器。当处理器的程序计数器的值等于断点寄存器中的值时，会发生补丁插入，即处理器从执行固件偏离到执行补丁指令。优选地，嵌入式系统设备包括单个集成电路。处理器可以包括多个断点寄存器。可以加密补丁以增加安全性。多个补丁可以链接在一起，并且考虑运行时补丁更换。

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