JPS6316331A - Constitution of inter-job shared load module - Google Patents

Abstract

PURPOSE:To produce a shared program with no recompiling by using a rearrangement means which replaces the reference address of an inter-job shared program when said address is used as an actual address. CONSTITUTION:An inter-job shared program is loaded to a real memory device 7 as follows. That is, a load module is supplied (S18) and it is decided whether or not the load module is the first one in this system (S19). If so, an inter-job shared area is loaded to the device 7 (S20). Then the area of a reference address is replaced so that the area of a defining address is equal to that loaded actually. Thus the addresses are rearranged by a rearrangement means. In such a way, the addresses are rearranged for each job and therefore the inter-job shared program can be produced with no transfer of registers nor recompiling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a computer system capable of multi-programming, and particularly to a configuration method of a load module shared between jobs.

[Conventional technology]

Conventionally, the following two methods are known for configuring an inter-job shared load module.

(1) Programming is performed as a program that can be re-entered, placed at an address common to all jobs on the virtual storage device, and the only program area is loaded into the real storage device.

(2) Specify an area uniquely used for each job on the source program, and when loading, transfer the area shared between jobs to the real storage device as the only area.
・Loads the location area into the real storage device every ′・′, and sends and receives the address of the unique area using the register.
x) = Therefore, it is difficult to create 9. For example.

It is necessary to consider whether to dynamically create an area that is unique to Noyob during execution, or to prepare it on the side that calls a re-inputable program.

(2) In the method of conventional technology (2), it is necessary to specify the area to be used uniquely for each job on the Nancezorodram, so recompilation is required to make an existing program shared between jobs. be.

[Means for solving problems]

The configuration method of the load module shared between jobs according to the present invention is applicable to a computer system capable of multi-programming in which object modules are divided into segments according to the attributes of coats and data.
- When creating a file, the object mono is inspected to automatically determine the code segment (a first determination means that determines that the area is shared between jobs, and a first determination means that determines that the specified segment is shared between jobs). a second determining means for determining that the area is an area; an identifying means for identifying an area shared between jobs and an area uniquely used for each job by the first or second determining means; -) for each job; It has a relocation means for relocating an area that is uniquely used, and at the time of 0-dead, the identification means is input and the area shared between jobs is loaded into the real storage device as the only area, and the area shared between jobs is By rearranging all the areas uniquely used for each job using a relocation means and loading them into the real storage device for each job.

The present invention is characterized in that it eliminates the need to exchange addresses of unique areas using registers, and that it can be created by relinking object modules to existing programs without requiring modification of source 7'ograms.

〔Example〕

Two embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, upon inputting an object module 1, the linker 2 outputs the identification means 3 and the relocation means 4 as part of a single domoisir 5. The loader 6 is
The load module 5 is input, and according to the identification means 3, the common area is loaded into the real storage device 7 if there is no same domozole in the system. In this way, an inter-job shared program that effectively utilizes the real storage device is configured.

Next, the creation method and loading method of each means by the linker will be explained in detail.

A method of creating the identification means 3 will be explained with reference to FIG. First, each segment is inputted according to the attributes of the code and data (Stella f8), and each segment, which is a relocatable unit, is allocated to the virtual storage device (Step 9).

Next, it is determined whether the two allocated areas are shared between jobs. This judgment is.

If there is no user designation, the first determination means 10 performs the determination, and if the user designation exists, the second determination means 11 performs the determination. The first determining means 10 is.

Determine the code segment as an area shared between jobs. The second determining means 11 determines that the segment designated by the user is an area shared between jobs. This determination result is set in the identification means 3 of each area (step 12).

With reference to FIG. 3, the creation method of the relocation means 4 will be explained using an example in which object module A refers to object module B.

First, input the object module A13.

Information 14 for external references is detected. In the reference information 14, a reference name "B" and a reference address are set. The reference address is an address in object module A that stores the definition address of B. This reference address is stored in the relocation means 4.

Next, input object modality A5.

Definition base "B" and definition address are set as "B" in object module B. Definition address is "B" in object module B.
" is the declared address. This defined address is set in the relocation means 4.

This operation is performed for all address references of the input object module, and a set of reference addresses and definition addresses is output to the relocation means 4.

The loading method to the real storage device 7 will be explained with reference to FIG. First, enter load module 5 (Stella 7'18)
, -t is loaded for the first time on the system (step 19).

If it is the first time, the inter-job shared area is loaded into the real storage device 7 (step 20). Next, a job-specific area is loaded into the real storage device 7 (step 21). and,
The address is relocated by using the relocation means 4 to update the reference address area to the address where the defined address area is actually loaded (Stella f22)
.

In this way, addresses are relocated for each job, so
A shared program between jobs can be realized without exchanging addresses using registers. Furthermore, since it is possible to specify whether or not to make a shared area for each segment at the time of linking, a shared zologram between jobs can be created without reconfiguring.

〔Effect of the invention〕

As explained above, the present invention makes the real storage device effective by loading an area shared between jobs into the real storage device as the only area, and loading a job-specific area onto the real storage device for each job. This has the effect that the program to be used can be created even if it is not a re-inputable program, and that an existing program can be created simply by relinking it.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
FIG. 2 is a flowchart for creating identification means, FIG. 3 is a diagram showing tables necessary for creating relocation means, and FIG. 4 is a flowchart for loading to a real storage device. 1...Object module, 2...Linker, 3
... Identification means, 4... Relocation means, 5... Load module Figure 3 Do-13 Do-15, t7 node t joule A object 7 joule B redistribution quantum stage ~4

Claims (1)

[Claims] 1. In a multi-programming computer system where object modules are divided into segments according to code and data attributes, when creating a load module, the object module is inspected and code segments are automatically assigned jobs. a first determining means that determines that the specified segment is an area that is shared between jobs; a second determining means that determines that a specified segment is an area that is shared between jobs; and a relocation means for relocating the area uniquely used for each job. By inputting the identification means, the area shared between jobs is loaded into the real storage device as the only area, and all areas uniquely used for each job are rearranged by the relocation means, and the area is executed for each job. A configuration method of a shared load module between jobs, which is characterized in that it is loaded into a storage device.