JPH02244345A - Information processor - Google Patents

Abstract

PURPOSE:To securely sample fault information even if a new PSW stored in a hardware fixed area on a main storage is destroyed by setting the new PSW which is saved at the time of fault occurrence on a central processor and gathering information. CONSTITUTION:A new PSW 3 for system interruption is loaded on the hardware fixed area on the main storage 2 in IPL and a new PSW 5 is saved on a control storage 4, etc., which can not be referenced from software. When an application program loaded on the main storage 2 causes fault during processing execution to generate a system interruption, the new PSW 5 saved on the control storage 4 is taken out and set on the central processor 1 to sample the fault information. Consequently, even if the software destroys the new PSW 3 in the hardware fixed area on the main storage 2, the saved new PSW 5 can be taken out and set on the central processor 1 to sample the fault information.

Description

[Detailed Description of the Invention] [Summary] Regarding an information processing device configured to collect failure information by an interrupt when a failure occurs,
The purpose of this is to save the SW to an area that cannot be referenced by software and retrieve it when a system interrupt occurs to reliably collect failure information. At the same time as loading the new PSW, the new PSW is saved in advance to an area that cannot be referenced by the software, and when a failure occurs during processing by the application program loaded onto the main memory, the saved new PSW is saved. Take it out, set it in the central processing unit, and configure it to collect failure information.

[Industrial application field]

The present invention relates to an information processing apparatus configured to collect failure information by interrupting when a failure occurs.

[Prior Art and Problems to be Solved by the Invention] Conventionally, when a failure occurs for some reason during execution of processing in an information processing device and a system interrupt occurs, as shown in FIG. A new PSW (program status word) 13 is taken out from the hardware fixed area at the top, set in the central processing unit 11, and fault information is collected. Therefore, if the contents of the hardware fixed area on main memory 2 were destroyed due to a software failure, there was a problem in that normal interrupt processing could not be performed and information at the time of failure could not be collected. .

An object of the present invention is to save the interrupt PSW to an area that cannot be referenced by software during IPL, and to take it out when a system interrupt occurs to reliably collect fault information.

[Means to solve problems]

Means for solving the problem will be explained with reference to FIG.

In FIG. 1, a central processing unit 1 executes various processes.

The main memory 2 is a memory consisting of a hardware fixed area for storing a new PSW 3 for system interrupts, etc., an application program area for loading application programs, and the like.

The control memory 4 is a storage area provided in an area that cannot be referenced from application programs, and is used to save the new PSW 5 for system interrupts.

[Effect]

As shown in FIG. 1, the present invention stores a new PSW 3 for system interrupts in a hardware fixed area on the main memory 2 during IPL.
At the same time, the new PSW 5 is saved in the control memory 4, etc., which cannot be referenced by the software.If a failure occurs during processing by the application program loaded on the main memory 2 and a system interrupt occurs, the new PSW 5 is saved in the control memory 4. The evacuated new PSW 5 is taken out and set in the central processing bag 21, and failure information is collected.

Therefore, even if the software destroys the new PSW 3 in the hardware fixed area on the main memory 2, the saved new PSW 5 can be taken out and set in the central processing unit 1 to ensure failure information can be collected. becomes possible.

〔Example〕

Next, the configuration and operation of one embodiment of the present invention will be explained in detail using FIGS. 1 and 2.

In FIG. 1, a central processing unit 1 sets a current psw (program status word) and executes various corresponding processes.

The main memory 2 is a memory consisting of a hardware fixed area for storing new PSW 3 for system interrupts, etc., a system area for loading system programs, an application program area for loading application programs, and the like.

The control memory 4 is an example of a storage area provided in an area that cannot be referenced from application programs, and is used to save the new PSW 5 for system interrupts according to this embodiment.

Next, the operation of the configuration of one embodiment of the present invention will be explained using FIG.

In FIG. 2, ■ performs PL, which means that before operating the computer system, control information such as the new PSW 3 for interrupts, system programs, etc. are transferred from the external storage device to the beginning part on the main memory 2. This means loading it into the hardware fixed area, system area, etc.

(2) saves the new PSW to an area that cannot be referenced by software. This means that the new PSW 5 is saved in the control memory 4, control buffer, register, etc., which are areas that cannot be referenced from the application program.

■Load the program and run it. This means, for example, that an application program is loaded into the application program area on the main memory 2 in FIG. 1, and business processing is executed thereby. At this time, various information (error information, etc.) is also collected as shown in (3).

(2) determines whether or not a failure has occurred. If YES, execute ■. If NO, execute ①.

As for ■, it was determined that a failure had occurred in ■, so the new PSW5 was read from the save area, set in the CPU (Central Processing Unit 1), the control program for information collection was started, and the information collected in ■ Execute information collection processing such as extracting the information externally.

〔Effect of the invention〕

As explained above, according to the present invention, a new PSW to be used when a failure occurs is provided in an area that cannot be referenced from software.
5, and the new PSW that was saved when a failure occurred.
5 is set in the central processing unit 1 to collect information, even if the new PSW stored in the hardware fixed area on the main memory 2 is destroyed, fault information will be reliably collected. can be collected.

FIG. 1 is a configuration diagram of one embodiment of the present invention, 2nd ryJ is a flowchart explaining the operation of the present invention, and FIG. 3 is an explanatory diagram of the prior art.

In the figure, 1 is the central processing unit, 2 is the main memory, and 3.5 is the new PS.
W (program state word), 4 represents control memory.

Claims (1)

[Claims] In an information processing device configured to collect fault information by interrupt when a fault occurs, a new PSW ( 3), the new PSW (5) is saved in advance to an area that cannot be referenced by the software, and when a failure occurs during processing by the application program loaded onto the main memory (2), An information processing apparatus characterized in that the above-mentioned evacuated new PSW (5) is taken out and set in the central processing unit (1), and failure information is collected.