JPS59178542A - Information processing device - Google Patents

Abstract

PURPOSE:To easily set an information processing device to a stopping condition at any optional locations on a program, by providing a function which executes an instruction for setting the information processing device under an executing condition to a stopping condition and executing the instruction. CONSTITUTION:An information processing device reads out an instruction out of programs on a memory and slowly advances an address counter, and then, starts processing by checking instruction codes. When the instruction code is a stop instruction at this time, the device puts a bit of a newly installed position displaying the stoppage in a register displaying that there is an interrupting cause. When the instruction is processed, an interrupt register is referred and whether it is interruption or stop display is discriminated. When it is stop display, this device is stopped. Moreover, since the content of the memory is read out and displayed by a display at this time, the condition of the system can be checked in detail.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to the command execution function of an information processing device.

(2) Prior art and problems When debugging a program or searching for a failure in an information processing device, in order to analyze the operation near the instruction address of the program that was running when an abnormality occurred, the information processing device It is often necessary to stop the progress of a motion.

In conventional information processing equipment, for such cases, if you specify the perfect address of an instruction or operand from the information processing equipment panel or control console, when that address is detected, an interrupt will be generated and the system will stop. Many of them have certain functions. Therefore, as needed, methods have been adopted, such as making use of this function or providing a step in advance in the program in which the branch destination points to its own address and creating a loop.

Among these, the former method of specifying the perfect address is used because the relationship between the logical address of a program or the like at the location where you want to stop the information processing device and that perfect address is not constant (
(depending on the system editing), the investigation is not only troublesome but also prone to errors. Furthermore, the latter method of looping the program has the disadvantage that the information processing apparatus does not come to a halt state, so the state of the system changes.

t fc microprocessors may have a halt instruction that stops the progress of the program, but this is similar to the case when the program is looped because it repeatedly executes the 7-λvelation instruction. had the disadvantage that the state of the system changed.

(3) Purpose of the Invention In view of the above-mentioned drawbacks of the conventional technology, the present invention provides information processing at any position on a program when it is necessary to know the state of the system in detail, such as when debugging a program or searching for a failure in an information processing device. It is an object of the present invention to provide an information processing device that can easily put the device in a suspended state.

(4) Structure and object of the invention As described in the claims, the present invention has a function of executing an instruction for the purpose of bringing an information processing device in an execution state into a halt state, and the execution of the instruction This is achieved by an information processing device characterized in that it can put itself into a stopped state by.

(5) Embodiment of the Invention FIG. 1 is a flowchart showing control related to a stop command in an information processing apparatus according to an embodiment of the present invention, where 1 represents branching based on an instruction code of an instruction other than a stop command. , 2.
5.4 represents processing steps of different instructions.

In FIG. 1, when an information processing device reads an instruction from a program on a memory, it increments an address counter in preparation for reading the next instruction. The instruction code is then examined and control is passed to processing steps 2 to 4 for each instruction. At this time, if the instruction code is a stop instruction according to the present invention, a newly provided bit at a position indicating a stop is simply set in a register indicating that there is an interrupt cause. When the processing of the instruction is completed, the register is referred to, and it is determined whether the interrupt is a stop indication, and if it is a stop indication, the information processing apparatus is placed in a halt state. At this time, the display device can read and display the memory contents and output a memory dump list, making it possible to examine the system status in detail.

FIG. 2 is a flow chart showing control related to a stop command in an information processing apparatus according to another embodiment of the present invention, and steps 11 to 4' are the same as those in FIG. 1.

In the embodiment shown in FIG. 2, the stop command is not automatically stopped as in the case of FIG. 1, but the stop command is accepted only when certain conditions are met. For example, a method is adopted in which the value written in the operand of the stop command is compared with the contents of a specific register to determine whether or not to enter the stop state.

(5) As described in detail, according to the information processing device of the present invention, the information processing device that is executing the program can be stopped by a stop command written in the program. This is highly effective because the system status at any point in time can be easily investigated when debugging systems or searching for failures in information processing equipment.

Furthermore, the present invention does not require any major changes in the control of the conventional information processing apparatus, and as can be understood from the flowchart of the embodiment described above, the present invention can be easily implemented by slightly changing the control of the conventional interrupt processing. It is possible to realize this.

[Brief explanation of the drawing]

FIG. 1 is a flow chart showing control related to a stop command in an information processing device according to one embodiment of the present invention, and FIG. 2 is a flow chart showing control related to a stop command in an information processing device according to another embodiment of the present invention. . 1.1'...Branch based on instruction code of instruction other than stop instruction, 2-4.2'-4'...Instruction processing step

Claims (1)

[Claims] An information processing device having a function of executing an instruction intended to put an information processing device in a running state into a stopped state, and capable of putting itself into a stopped state by executing the instruction.