JPH09204307A - Program dynamic link device and method - Google Patents

Abstract

(57) Abstract: A device and a method for executing a link by creating a table for managing an identifier and a start address of a program of a different language development of a link destination when a dynamic link request occurs. Kind Code: A1 A dynamic link device 1 that receives a link request issued by a program executed by an operating system registers load means 11 for loading a program at a lick destination into virtual memory, and an identifier and a start address of the program. And a table creating means 12 for creating the execution start address table 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to dynamic program linking of programs, and more particularly to a program dynamic linking apparatus and method for performing jump processing for dynamically linking programs developed in different languages.

[0002]

2. Description of the Related Art In the prior art, when the language of the jump source program does not support jump processing to a program developed in a different language of the jump destination program, the jump source program is the execution start address of the jump destination program. The jump source program could not perform the jump process to the jump destination program because the means for acquiring the is not supported. According to Japanese Patent Laid-Open No. 4-2872424, which solves this problem, a load having a search information table for setting a jump destination in its own load module and an absolute address unique in the system, and an object to be actually processed. The address of the jump destination load module is set in the jump source load module by the module and the link editing program between programs, and the search information table is searched by the information of the jump source object to obtain the jump destination address. , And are disclosed. In this publication, the jump source address must be provided in advance as a search information table in the jump source, and the migration destination is limited for the dynamic link. There is also a problem that the absolute address cannot be determined for the virtual memory.

[0003]

When the jump source program dynamically links the jump destination program, the jump destination program is loaded by a link request,
An execution start address management table is created in which the identifier of the program and the address on the virtual memory are fixedly registered, and the jump destination program that can be dynamically linked is not restricted.

[0004]

An object of the present invention is to start execution in a virtual memory shared by mutual programs when a jump source program issues a dynamic link request to load a jump destination program. An address management table is created, and the execution start address of a jump destination program that is dynamically linked by using a program identifier between different languages as a key is registered in the execution start address management table to link the jump destination programs. .

Therefore, the program dynamic linking device for dynamically linking the first program executed by the operating system of the present invention with the second program developed by a different language to execute the program is the operation of the first program. For receiving the second program in response to the dynamic link request, the identifier of the second program and the execution start address of the second program are acquired and managed from the dynamic link request and the means for loading. And a means for creating a table.

Further, a method of dynamically linking a first program executed by an operating system of the present invention with a second program developed by a heterogeneous language is a method of dynamically linking the first program to the second program. Requesting a link, and loading the second program based on the dynamic link request, and creating an execution start management address table for managing an identifier and an execution start address of the second program,
Searching the execution start management address table based on the identifier of the second program for which the dynamic link request is made; and obtaining the execution start address corresponding to the identifier of the second program from the execution start management address table. And a step of jumping to the execution start address and starting execution of the second program.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings.

Referring to FIG. 1 showing the system configuration of an embodiment of the present invention, the dynamic link device 1 loads the jump destination programs 31 to 3n of the jump destination program group 3 onto the virtual memory 11 by loading means 11. And the key number, which is the identifier of the programs 31 to 3n read by the loading means 11, is stored in the keys 211 to 21n of the execution start address management table 2 as the program 3 on the virtual storage.
The table creating means 12 is provided for registering the execution start addresses 1 to 3n in the execution start addresses 221 to 22n of the execution start address management table 2, respectively.

Next, the operation of the embodiment shown in FIG. 1 will be described with reference to FIG. 2 showing the operation flow of the dynamic link device 1 and FIG. 3 showing the operation of the jump source program. When the jump source program is started, a link request is issued and the loading means 11 is activated. The loading means 11 reads the jump destination program groups 31 to 3n into the virtual memory (step 71 in FIG. 2). The table creating means 12 creates the execution start address management table 2 on the shared virtual memory, and assigns the program number of the identifier given to the jump destination program module 31 to 3n to the key positions 211 to 21n of the program. The execution start addresses are registered in the execution start addresses 221 to 22n corresponding to the key positions 211 to 21n, respectively (step 72 in FIG. 2). After that, the processes are repeated by the number of the jump destination programs 31 to 3n (YES in step 73 of FIG. 2). When the dynamic link device 1 finishes executing (NO in step 73 of FIG. 2), the main bodies of the jump destination programs are all read in the virtual memory, and the execution start addresses 221 of the individual jump destination programs 31 to 3n are read. To 22n and a program number 211 which is a key
21n are registered in the execution start address management table 2.

Referring to FIG. 3 showing the flow of the operation of the jump source program, when the jump processing from the jump source program to the jump destination program is started (step 4 in FIG. 3), first the jump processing of the jump source program itself is performed. , The execution start address management table 2 is searched using the program numbers 1 to n given to the individual jump destination programs 31 to 3n as keys (step 74), and the execution start address 221 of the jump destination program is searched from the execution start address management table 2. Through 22n, the corresponding address is acquired (step 75). The jump source program can obtain the execution start address of the jump destination program by the processes of steps 74 and 75 described above (step 5 of FIG. 3). The jump source program jumps at the execution start address of the obtained jump destination program (step 76) and executes the processing of the jump destination program (step 6 in FIG. 3).

According to the above description, the present invention can dynamically link programs of different languages to start execution, but it can also be applied to dynamic linking of programs of the same language. Is clear.

[0012]

As described above, according to the present invention, when the jump destination program for dynamic linking is loaded, the execution start address management table created in the virtual storage area shared by the programs is referred to. And you can get the real address regardless of the development language.
Jump processing between programs developed in different languages is possible.

Further, according to the present invention, jump processing between different languages is possible, so that there is no need to create a new program when there is a program already created, so the development scale can be reduced. You can

[Brief description of drawings]

FIG. 1 is a diagram showing a system configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing the steps of a dynamic linking method.

FIG. 3 is a diagram showing a flow of operations of a jump source program for the dynamic linking means of FIG. 1;

[Explanation of symbols]

1 Dynamic Link Device 2 Execution Start Address Management Table 3 Jump Destination Program Group 11 Loading Means 12 Table Creating Means 31 to 3n Jump Destination Programs 1 to n 211 to 21n Identification Key Numbers of Jump Destination Programs 1 to n 212 to 22n Jump Destinations Execution start address of programs 1-n

Claims (2)

[Claims] 1. A program dynamic linking device for dynamically linking and executing a second program developed by a heterogeneous language, wherein a first program executed by an operating system dynamically executes the first program. A means for receiving a link request and loading the second program, and an identifier of the second program and an execution start address of the second program are acquired and managed from the dynamic link request and the loading means. A program dynamic linking device comprising: a means for creating a table. 2. A method for dynamically linking a first program executed by an operating system with a second program developed in a heterogeneous language, wherein the first program dynamically links the second program. Requesting a link, loading the second program based on the dynamic link request, and creating an execution start management address table for managing an identifier and an execution start address of the second program, Searching the execution start management address table based on the identifier of the second program that is the target of the dynamic link; and acquiring the execution start address corresponding to the identifier of the second program from the execution start management address table. And jumping to the execution start address Program dynamic linking method, which comprises the steps of initiating execution of the ram, the.