Method and system for storing important information before system collapse

Abstract

The invention provides a method for saving important information during system crashes and comprises the following steps: a watchdog generates system error signal and provides the signal to a processor; the processor triggers an exception handling program for recording important information during system crashes; after the information is recorded, a reset signal is generated for resetting the system. Simultaneously the invention provides a storage system for storing important information during system crashes, which comprises the watchdog that is used for generating the system error signal; a processor unit that is used for triggering the exception handling unit according to the system error signal; an exception handling unit that is used for recording important information during system crashes and generating the reset signal for resetting the system after information is recorded. The invention can record system information and user-caring information in time during system crashes, and by changing places for recording information and adopting an automatic storage way after starting the system, the invention can extract information very simply and conveniently.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for storing important information before system crashes. Background technique [0002] In a system, especially an embedded system, if there is a bug in the software program or a hardware problem, the system will inevitably crash. If you want to completely solve the problem of system crash, you must find out software bugs or hardware problems, and solve these problems; however, system crashes often occur in an instant, without any performance before the occurrence, and will immediately cause the processor to crash and restart. , unable to effectively locate the problem. Therefore, saving important system information and information that users care about when the system crashes will play a very important role in locating the cause of the problem. [0003] Now some embedded operating systems can save task information, task switching information, memory information, or...

AI Technical Summary

Problems solved by technology

[0007] 2. It is inconvenient to take out and save information after the system crashes, or the saved information is damaged so that the information cannot be taken out

Under normal circumstances, the saved system information is stored in the system memory. After the system crashes, it needs to be taken out through special equipment such as an emulator, or through a special program before the system restarts, which is very inconvenient to use.

Moreover, if the system crashes and causes the system to automatically restart, after loading the user program, the saved information will be destroyed, resulting in the situation that it cannot be taken out.

[0008] In addition, nowadays embedded systems, especially embedded systems in the communication field, require immediate restart and recovery after a system crash occurs, and it is difficult to leave time to retrieve the saved information

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