JPS6324326A - Patch registering system - Google Patents

Abstract

PURPOSE:To reduce the correction mistake of a patch by containing a symbolic expression and an actual address correspondence table in a program to be patched. CONSTITUTION:A patch 3 is inputted, the symbol 21 of a symbol actual address correspondence table 2 is read out successively by an address converting means 4, compared with the symbol 31 of the inputted patch 3, and that which coincides is retrieved. Subsequently, the actual address of the symbol which has coincided is read out of the correspondence table 2, and a patch address in a program body 6 is obtained by an address conversion from an offset which is inputted. By the obtained patch address and the inputted patch data, a patch turn-on means 5 patches the data in the patch address of the program body 6, to the inputted patch data.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a patch registration method.

[Conventional technology]

In the conventional patch registration method, the actual address of the patched program and the content to be patched were included in the patch, so if a part of the patched program was modified, the real address to be patched would be changed. In such cases, the patch creator would create and submit a new patch every time the real address was changed.

[Problem that the invention seeks to solve]

In the conventional patch registration method described above, the patch itself reads the real address of the patched program, so if a part of the patch program is modified, the real address of the modified part is changed, and the patch is attempted to be patched. Since there is a possibility that even the real address of the patch may be changed, the patch creator must check the real address again, and if the real address they were trying to patch changes, they will have to re-create the patch. In addition, if there are a number of patches for one program, a large number of man-hours are required to correct them, and correction errors may occur.

[Means for solving problems]

The patch registration method of the present invention is a batch registration method for a patched program consisting of a plurality of partial programs.
A symbol real address correspondence table is prepared in which a symbol that specifies the partial program and the corresponding real address of the partial program are stored in pairs, and the symbol of the partial program to be patched and the position to be patched in the partial program are determined. Enter virtual address information including specifying information and patch data, search for a symbol in the symbol-real-address correspondence table that matches a symbol in the virtual address, and find the real address corresponding to the symbol and the input patch data. The real address to be patched is calculated by address conversion from the address information in the virtual address information, and the real address to be patched is calculated based on the real address to be patched and the input patch data. Configure by patching.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

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

The batch registration method shown in FIG. 1 consists of a program 1 including a program body 6 and a symbol real address correspondence table 2, a patch 3 including symbols, offsets, and patch data, an address conversion means 4, and a patch input means 5. It consists of

The program body 6 is composed of a plurality of partial programs. The component programs are A, B, C, and D respectively.
Name it. This program name is hereinafter referred to as a symbol.

Therefore, the symbol 21 of each partial program and the start real address 22 of each partial program are stored in pairs in the symbol real address correspondence table 2.

Patch 3 includes data on which line of which partial program is to be patched. That is, a symbol 31 for the name of the partial program to be patched, an offset 32 indicating the number of lines to be patched from the start line of the partial program, and patch data 33 that is the data to be patched.
It is included. Next, the operation of this embodiment will be explained with reference to FIG. 2, which is a flowchart showing the operation of FIG. 1.

In step 201, patch 3 is input, symbol 21 of symbol real address correspondence table 2 is converted by address conversion means 4.
are read in order and compared with the symbol 31 of the input patch 3 to search for a match (step 202). Next, the real address of the matching symbol is read from the symbol real address correspondence table 2, and the address is converted from the input offset (in the case of this embodiment, the real address of the symbol and the offset are added). Obtain the patch address (step 203).

Based on the batch address thus obtained and the input patch data, the patch input means 5 patches the data at the batch address of the program main body 6 to the input patch data (step 204).

If corrections such as adding lines in a partial program are made by adding them to the last line in the partial program, only the symbol real address correspondence table 2 will be changed, and it will not be changed from Offsera 1 in Patch 3. Patches do not affect modifications to patched programs.

In this embodiment, a patch location is identified using a symbol and an offset, but the present invention is not limited to this, and any patch location may be identified using a symbol.

〔Effect of the invention〕

As explained above, the present invention changes the address of the patched program, which was conventionally included in the patch, into a symbolic expression and an offset, and includes the symbolic expression and real address correspondence table in the patched program. Even if a change occurs due to a modification, the real address can be obtained from this correspondence table and the symbolic representation of the patch, which eliminates the need for patches that were previously created every time a program was changed, and also eliminates the possibility of errors in patch modification. It has the effect of reducing

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
3 is a flowchart showing the operation of the figure. DESCRIPTION OF SYMBOLS 1... Target PC/Sochi program, 2... Symbol real address correspondence table, 3... Patch, 4... Address changing means, 5... Patch inputting means, 6... Program body, 21゜31...Symbol, 22...Real address, 32...Offset, 33...Patch data, 2
01-204...Steps of the flowchart.

Claims (1)

[Claims] In a patch registration method for a patched program consisting of a plurality of partial programs, a symbol real address correspondence table stores pairs of symbols specifying the partial programs and corresponding real addresses of the partial programs. , input virtual address information including the symbol of the partial program to be patched and address information specifying the position to be patched in the partial program, and patch data, and input the patch data that matches the symbol in the virtual address. Searching for a symbol in the symbol real address correspondence table, calculating the real address to be patched by address conversion from the real address corresponding to the symbol and the address information in the input virtual address information, and calculating the real address to be patched by address conversion. A patch registration method characterized in that the patched program is patched using an address and the input patch data.