JPH01211131A - Shared data area collating system - Google Patents

Abstract

PURPOSE:To attain the same processing as an internal data referring as it were when shared data are referred to and to facilitate the use of the shared data by executing the referring resolution of the shared data extended over between programs at the time of loading. CONSTITUTION:An information processor is composed of a central processing unit 10, a main memory 11 and a disk device 12. A common data file 8 is built in the device 12 and a shared data area 20 and a shared data label name table 9 are provided at this. A program file 21 is also built in the device 12 and a shared data referring program area 2 and a shared data label referring table 22 are provided at this. In the device 11, a linker 16 to prepare files 18 and 21, a program loader 15, a shared data label table 13, a shared data area 14 and a shared data referring program area 17 are built, a file on the device 12 is loaded onto the device 11 by the loader 15 and the table 13 and the area 14 are secured by the file 18. Thus, the shared data file is prepared by the linker 16.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a shared data area referencing method, and more particularly to a method for executing while referring to shared data resident on a main storage device.

(Prior Art) Conventionally, as a shared data area reference method for such a program, the first program to start execution reserves a certain area in the main memory as a shared data area, and then some method is used to reference the shared data area for later programs. So, the location of that area is Rfden 4.
A method to do this is publicly known.

(Problems to be Solved by the Invention) In the conventional shared data area reference method described above, the first program to run secures an area on the main storage device, so initial values must be set in the execution logic. .Therefore, the corresponding logic is required to set the initial value.

When other programs refer to this area, they refer to it using an offset from the start address of the shared data, so there is a drawback that if the data changes, the logic needs to be changed.

An object of the present invention is to eliminate the above-mentioned drawbacks by having a linker and a program loader manage data symbol names, and to create a program that references shared data and to share data without requiring the programmer to be aware of the physical data declaration position. An object of the present invention is to provide a shared data area reference system configured to facilitate the use of data.

(Elaborated means for solving the problem) The shared data area reference method according to the present invention includes a shared data creation means and a reference program creation means.

The shared program loading means, the reference program loading means, the shared data label table creation means, the shared data label reference table creation means, the data label table absolute addressing means, the address relocation means, and the shared data creation means, This is a method that creates a shared data file by combining object files containing only data portions during linker processing.

The reference program creation means is for creating a shared data reference program file for referencing the shared data file.

The shared program loading means is for loading the shared program on the disk device onto the main storage device as a shared program in the program loading process.

The reference program loading means is designed to load the shared data reference program on the disk device onto the main storage device.

The shared data label table creation means correlates the data label name declared in the object file of the data section and the relative address on the shared data when the shared data file is created by the linker when the shared data reference program is executed. This is to create a shared data label name table after combining object files.

The shared data label reference table creation means correlates the data name with the address of the program that references the shared data name in the object file when creating the reference program, and after combining the object files, creates the shared data label reference table. belongs to.

The data label table absolute addressing means loads the shared data label name table onto the main storage device when loading shared data in program loader processing, and converts the data label name to data label name relative address string table onto the main storage device. It is intended to be created as a shared data table.

The address relocation means expands the shared data reference program onto the main storage device when the shared data reference program is loaded, and searches for the shared data label table by drawing the shared data label reference table from the shared data reference program file. This is for embedding the absolute address of the data label forming the matched label pair into the reference point address.

(Example) Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an information processing lid to which a shared data area reference method according to the present invention is applied.

In FIG. 1, 10 is a central processing unit, 11 is a main storage device, and 12 is a disk device.

The disk unit fl12 is provided with a shared data file 18 and a program file 21. The shared data file 18 includes a shared data area (on the disk) 20 and a shared data label name table (on the disk) 19 which is a relative address sequence of data label names to data label names defined by this shared data. Program file 21 is a shared data reference program area (on disk)
23, and a shared data label reference table 23 which is a reference data label name pair reference point address sequence, and is for referencing shared data.

The main storage device 11 includes a shared data file 18, a linker 16 for generating a program file 21 that references all of the shared data, a program loader 15, a shared data label table 13, a shared data area 14, and a shared data reference It consists of a program area 17. Linker 1
6 includes a shared data creating means 16-1, a shared data label name table creating means 16-2, a reference program creating means 16-3, and a shared data label table creating means 16-4. ing. The program loader 15 is for loading a program file 21 that refers to shared data, and the shared data loading means 15 to
1, and data label table absolute addressing means 15-
2, reference program loading means 15-3, and address relocation means 15-4.

The file on the disk device 12 is loaded onto the main storage device 11 by the program loader 15, and the shared data file 18 is loaded into the shared data label table 13. And a shared data area (on main storage device ll) 14 is secured. Further, the program file 21 that refers to the shared data area 14 is provided with a shared data reference program area (on the main storage device 11) 237jX.

FIG. 2 is a flowchart showing the creation process of the shared data file 18 among the processes performed by the linker 16. The process shown in FIG. 2 includes a data label address determination process 1 and a shared data label name creation process R2.

In the data label name address determination process RIVc, the linker 16 reads the data object file and correlates the data label name declared there with the relative address on the shared data 20 during the linking process.

In shared data label creation name processing R2, linker 1
After combining all object files by step 6,
The relative address of data label a for data label name, the relative address of data label b for data label name, etc. related by data label name address determination processing R1 are set as one column, and the shared data label name (disk )19'1F! : Created independently in the shared data file 18 in an area different from the shared data area (on the disk device 12) 20.

FIG. 3 is a flowchart showing the process of creating a shared data reference program file 21 that refers to shared data among the processes performed by the linker 16.

The process shown in FIG. 2 includes a shared data label reference address determination process Sl and a shared data label reference table creation process S.
2 is included.

In the shared data label reference address determination process 81,
The linker 16 reads the object file and correlates the entry label name referenced therein with the address of the shared data reference program (on the disk device 12) that references the shared data during the linking process.

In the shared data label reference table creation process S2, after all object files are combined by the linker 16, the shared data label reference address determination process S1
A shared data label reference table 22 formed as one column with reference data label name pair reference address a, reference data label name pair reference address b, etc., which are related by , is stored in the shared program reference program file 21.
The shared data reference program (disk unit 1
2 upper) Create it independently in a different area from 23.

Figure i4 shows, among the processing by the program loader 15, loading the shared data file 18 onto the main storage device 11,
2 is a flowchart showing a process of expanding the shared data area (on the main storage device 11) 14 and the shared data label 13; Fourth
In the figure, main memory card processing T1 for shared data.

Main memory load processing T2 of shared data label table 13
and are included.

In the shared data main memory load process T1, the program loader 15 transfers the shared data area (on the disk device 12) 20 in the shared data file 18 to the main storage device 11 in order to execute the load request for the shared data file 17.
Shared data area (on main storage device 11) 1 in any area of
Expand as 4.

Main memory load processing T2 of shared data label table 13
In , the program loader 15 immediately loads the corresponding one blue report into the shared data label name table (on the disk device 12) 19 and the main storage device 11 upon completion of the shared data main memory loading process T1. At this time, the relative address of the data label name versus the data label, the relative address of the data label, and the shared data (on the main storage device 11)
14 loaded head addresses are added and converted into absolute addresses to create a shared data label table 13 which is an absolute address string of data label names versus data labels.

FIG. 5 shows that among the processing by the program loader 15, the shared data reference program file 21 is transferred to the main storage 11.
FIG. The above processing includes a shared data reference program loading process u1, a reference data label drawing process u2 from the shared data label reference table, and a shared data label search process u3.

En) IJ label absolute address embedding process u4,
This includes shared data reference program execution start processing U5.

In the shared data reference program loading process u1, when a load request for the program file 21 that references shared data is issued, the program loader 15 loads the shared data reference program area ( Disk device 1
2] 23 is deployed as a shared data reference program (on the main memory) 17 in an arbitrary area of the main memory 11.

In the reference label drawing process u2 from the shared data label reference table, when the shared data reference program loading process u1 is completed, the program loader 15 reads the shared data reference program file 18, and extracts the first reference data label name a and the pair of references. Draw point address a.

In the shared data label table search process u3, based on nine reference data label names.

The data label name in the shared data label table 13 on the main storage device 11 is searched, a data label name that matches the reference data label name a is found, and the absolute address of the paired data label is determined.

In the data label absolute address program embedding process u4, the shared data reference program area (on the main storage device 11) 17 indicated by the reference point address a paired with the reference data label name a is searched, and no results are found. Embed the absolute address of the data label. As a result, the main storage device 11
At the top, there is a shared data area (on main memory 1) l4 and a shared data reference program area (on main memory 11).
17 is now associated. The above process u2→u3→u4 is repeated until processing of all reference data label names in the shared data label reference table 22 is completed.

In the shared data reference program execution start process u5,
Data label absolute address program embedding process u4
When the processing is completed.

The program loader 15 passes control to the processing execution start point in the shared data reference program area 17. FIG. 6 shows an example of execution after control is passed.

FIG. 6 shows a first shared data reference program (load module) 31 and a second shared data reference program (load module).
load module) 32.

It consists of a shared f-1 (load module) 32. The shared data (load module) 32 is stored in the main storage device 1 in advance.
1, the shared data reference program is loaded by the program loader. Therefore, the first or second shared data reference program 31.
33 is loaded into the main storage device 11. Therefore.

The problem with the reference address of the shared data label name of the first and second shared data reference programs is solved by the process when the program loader loads the shared data reference program, and when each program is executed, the shared data 32 are available.

(Effects of the Invention) As explained above, in the present invention, by performing reference resolution of shared data across programs at the time of loading,
The programmer can refer to the shared data area as if referring to internal data, and has the advantage that no special procedure is required and the shared data can be easily used.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a shared data area reference method according to the present invention. FIG. 2 is a flowchart showing an example of shared program creation processing by the linker in the embodiment of FIG. FIG. 3 is a flowchart showing an example of the process of creating a shared data reference program by the linker in the embodiment of FIG. FIG. 4 is a flowchart showing an example of processing when a shared data reference program is loaded by the program loader in the embodiment of FIG. FIG. 5 is a flowchart showing an example of processing when a shared data reference program is loaded by the program loader in the embodiment of FIG. FIG. 6 is an explanatory diagram showing the execution of the embodiment shown in FIGS. 1 to 5. 10...Central processing unit 11...Main storage device 13
...Shared data label table 14.20...Shared data area 15...Program loader 16...Linker 17
...Shared data reference program 12...Disk device 18...Shared data file 19...Shared data label name table 21.23...
- Shared data reference program 22... Shared data label reference table 16-1... Shared data creation means 16-2... Shared data label name table creation means 16-4... Shared data label reference table creation means 15-1... Shared data loading means 15-2... Data label table absoluteization means 15-
3... Reference program loading means 15-4... Address relocation means Patent applicant NEC Corporation Representative Patent attorney Hisashi Inoro Figure 2 Figure 3 Figure 24 Figures 2 and 5 O 6

Claims (1)

[Claims] A shared data creation means for creating a shared data file by combining object files with only data parts in linker processing, and a reference program creation means for creating a shared data reference program file for referencing the shared data file. and a shared program loading means for loading the shared program on the disk device as a shared program onto the main storage device in program loading processing, and loading the shared data reference program on the disk device onto the main storage device. and a reference program loading means for loading the shared data, and when the shared data reference program is executed, the data label name declared by the object file of the data section and the relative address on the shared data when the shared data file is created by the linker. a shared data label table creation means for creating a shared data label name table after correlating the object files and combining the object files; and an address and data of a program that refers to the shared data name in the object file when creating the reference program. a shared data label reference table creation means for creating a shared data label reference table after merging the object files; a data label table absolute addressing means for loading onto the main storage to create a data label name versus data label name relative address string table as a shared data table on the main storage; and the shared data reference program. Expanding the shared data reference program onto the main storage device when loading the
Address rewriting for drawing a shared data label reference table from the shared data reference program file, searching the shared data label table, and embedding the absolute address of the data label forming the matched label pair in the reference point address. 1. A shared data area reference method comprising: a placement means.