JP2008217193A - Prelink system, prelink method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To apply a prelink even to built-in equipment having few resource. <P>SOLUTION: A system is constructed wherein an application before link processing is stored in an application storing server, a server having many prelinking resources is prepared, a symbol-address correspondence table of each the built-in equipment is previously stored in the server, and the prelinked application is transferred to the built-in equipment through the server when downloading the application. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a library pre-link system to an application program, and more particularly to a pre-link system used for an embedded device capable of installing an application.

  A conventional prelink system extracts unresolved symbols from an application program, searches a correspondence table between symbols and entry addresses of the library, and determines an address corresponding to the unresolved symbol.

An example of a conventional prelink system will be described with reference to FIG.
As shown in FIG. 1, this conventional prelink system 10 includes a symbol / address correspondence table creation unit 11, an unresolved symbol extraction unit 12, a correspondence table search unit 13, and a symbol resolution unit (prelink unit) 14. Is provided.

  The symbol / address correspondence table creating unit 11 creates a correspondence table between symbols and entry addresses of the library 20. The unresolved symbol extraction unit 12 extracts unresolved symbols from the application 30. The correspondence table search unit 13 searches a correspondence table between symbols and entry addresses. The symbol resolution unit (prelink unit) 14 determines an address corresponding to the unresolved symbol based on the search result, and provides the symbol-resolved library 40 and application 50.

As a related technique, Japanese Patent Laid-Open No. 63-024326 (Patent Document 1) discloses a patch registration method.
In this prior art, a correspondence table between symbols and addresses is held.

Japanese Patent Laid-Open No. 08-339296 (Patent Document 2) describes a method for linking a dynamic link library to a program.
This prior art generates a definition file containing information about the set of external symbols that can be used by the prelinker corresponding to the dynamic link library, compiles the program code into compiled code containing code that calls the trigger routine, and program code Is pre-linked to the definition file, the program code is linked by the system linker, the code is executed, and the unresolved symbol reference in the code is resolved by the trigger routine.

Japanese Patent Laid-Open No. 11-184706 (Patent Document 3) discloses a program transfer method for an image processing apparatus.
In this prior art, a computer device compiles and links a source program to create an executable program and transfers it to an image processing device.

However, the conventional prelink system has the following problems.
The first problem is that when applied to a device having various configurations such as an embedded device, a plurality of execution programs corresponding to the device must be prepared. The reason is that pre-linking is performed in the process of converting the source program into the execution program.

  The second problem is that it cannot be applied to an embedded device, particularly a device having a poor memory or CPU. The reason is that no consideration is given to embedded devices.

Japanese Unexamined Patent Publication No. 63-024326 JP 08-339296 A JP-A-11-184706

  In a conventional prelink system, preparing a prelinked application corresponding to embedded devices having various configurations has a burden on management. In addition, it is difficult or takes a long time to perform link processing in an embedded device with few resources. Furthermore, if the link processing is performed at the time of startup in the embedded device, there is a problem that the startup time of the application is delayed, which is not suitable for an embedded device that requires instantaneous operation.

An object of the present invention is to provide a prelink system that targets embedded devices and can easily cope with the diversity of embedded devices and manage applications by performing prelink when downloading a program.
Another object of the present invention is to provide a prelink system that can be applied to an embedded device having a limited use resource.

  In the following, means for solving the problem will be described using the numbers used in [Best Mode for Carrying Out the Invention] in parentheses. These numbers are added to clarify the correspondence between the description of [Claims] and [Best Mode for Carrying Out the Invention]. However, these numbers should not be used to interpret the technical scope of the invention described in [Claims].

  The prelink system of the present invention has a correspondence table storage unit (240, 520) for storing a correspondence table group of symbols and addresses for embedded devices (300, 600), and a correspondence for selecting a specific correspondence table from the correspondence table group. It includes a table selection unit (250, 530) and a prelink unit (260, 420) that prelinks an application using the correspondence table.

  The prelink system of the present invention includes an application acquisition unit (220) that acquires an application, a device identification information acquisition unit (230) that acquires device identification information including information that identifies an embedded device (300), and a correspondence table selection Using the correspondence table selected by the unit (250) according to the device identification information, the prelink unit (260) prelinks the application, and then transmits the prelinked application to the embedded device (300). Part (270). This corresponds to the first embodiment of the present invention.

  The prelink system of the present invention further includes a correspondence table sending unit (540) that transmits the correspondence table to the server (400) that performs the prelink. The prelink unit (420) performs prelink processing using a correspondence table when an application is requested in the server (400) that performs prelink. This corresponds to the second embodiment of the present invention.

  The embedded device (300, 600) of the present invention includes an application request unit (310, 610) for requesting download of an application and a device specification for transmitting device specifying information including information for specifying the embedded device (300, 600). An information transmission unit (330, 610) and an application reception unit (340, 620) that receives a pre-linked application transmitted in response to an application download request and device identification information.

  The embedded device (300) of the present invention further includes an application information transmission unit (320) that transmits information including application information received in response to an application download request and location information of the application.

  The pre-link method of the present invention corresponds to a request from the embedded device (300, 600), selects a symbol / address correspondence table corresponding to the embedded device (300, 600), and the embedded device (300, 600). ) For performing a pre-link process of the application.

  The prelink method of the present invention uses an application acquisition step, a step of acquiring device specifying information including information specifying the embedded device (300), and a correspondence table selected according to the device specifying information. Pre-link processing and transmitting the pre-linked application to the embedded device (300). This corresponds to the first embodiment of the present invention.

  The pre-linking method of the present invention is a step of acquiring a correspondence table from a server (500) that stores and manages a correspondence table of symbols and addresses of the embedded device (600) when an application download request is received from the embedded device (600). And a pre-link process adapted to the embedded device (600) during the application download process. This corresponds to the second embodiment of the present invention.

  Another pre-linking method of the present invention includes a step of requesting download of an application, a step of transmitting device specifying information including information specifying an embedded device (300, 600) requesting the application, and downloading of the application. Receiving a pre-linked application transmitted in response to the request and device specific information. This corresponds to the operation of the embedded device (300, 600) of the present invention.

  Another pre-linking method of the present invention further includes a step of transmitting information including application information received in response to an application download request and location information of the application. This corresponds to the operation of the embedded device (300, 600) of the present invention.

  The program of the present invention causes a computer to execute any one of the above prelink methods.

The first effect is that a prelinked application can be provided without imposing a load on the embedded device. The reason is that the prelink operation is performed in the prelink server outside the embedded device during the application download process.
The second effect is that the application provider can easily manage the application. The reason is that it is not necessary to prepare and manage an application for each embedded device because a prelink operation suitable for the corresponding embedded device is performed when the application is downloaded.
A third effect is that an application can be activated at high speed in an embedded device. The reason is that it is pre-linked, so it is not necessary to perform symbol resolution work at the time of activation.

Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings.
Referring to FIG. 2, the prelink system of the present invention includes a server 100, a server 200, and an embedded device 300.

  The server 100 stores an application. The server 200 performs prelink processing. The embedded device 300 requests the server 100 and acquires application information from the server 100.

  The server 100 includes an application storage unit 110, an application information transmission unit 120, and an application transmission unit 130.

  The application storage unit 110 stores an application. The application information sending unit 120 sends application information including at least information specifying the requested application to the embedded device 300. The application sending unit 130 sends the application requested from the server 200.

  The server 200 includes an application information acquisition unit 210, an application acquisition unit 220, a device identification information acquisition unit 230, a correspondence table storage unit 240, a correspondence table selection unit 250, a prelink unit 260, and an application transmission unit 270. Prepare.

  The application information acquisition unit 210 acquires information transmitted from the application information transmission unit 320 included in the embedded device 300. The application acquisition unit 220 acquires an application from the server 100 using the information acquired by the application information acquisition unit 210. The device identification information acquisition unit 230 receives information transmitted by the device identification information transmission unit 330 of the embedded device 300. The symbol / address correspondence table storage unit 240 stores a symbol / address correspondence table of each model provided by an embedded device manufacturer. The correspondence table selection unit 250 selects a corresponding correspondence table from the symbol / address correspondence table storage unit 240 using the information acquired by the device identification information acquisition unit 230. The prelink unit 260 performs a prelink process on the acquired application using the selected correspondence table. The application transmission unit 270 transmits the application subjected to the prelink process to the embedded device 300.

  The embedded device 300 includes an application request unit 310, an application information transmission unit 320, a device identification information transmission unit 330, an application reception unit 340, and an application storage unit 350.

  The application request unit 310 requests the server 100 for an application to be downloaded. The application information sending unit 320 sends to the server 200 information including at least the application information sent from the server 100 and the URL (Uniform Resource Locator) of the server 100. Note that the URL of the server 100 may be information indicating the location information of the application. The device identification information sending unit 330 sends information including at least information that can identify the embedded device 300 to the server 200. The application receiving unit 340 receives a prelinked application from the server 200. The application storage unit 350 stores the prelinked application received by the application reception unit 340.

Next, the overall operation of the present embodiment will be described in detail with reference to the sequence chart of FIG.
(1) Step S101
An application request is sent from the embedded device 300 to the server 100.
(2) Step S102
The server 100 sends application information to the embedded device 300.
(3) Step S103
The embedded device 300 sends the server 200 information including at least the URL of the server 100 and information that can identify the application.
(4) Step S104
The server 200 issues an application request to the server 100.
(5) Step S105
The server 100 sends the requested application to the server 200.
(6) Step S106
The embedded device 300 sends device specifying information including at least information that can be specified to the device to the server 200.
(7) Step S107
The server 200 selects a corresponding correspondence table from the correspondence table storage unit 240 using the acquired device identification information.
(8) Step S108
The server 200 performs prelink processing on the application acquired using the selected correspondence table.
(9) Step S109
The server 200 sends the pre-linked application to the embedded device 300, and the embedded device 300 receives the application sent from the server 200 by the application receiving unit 340.
(10) Step S110
The embedded device 300 stores the prelinked application by the application storage unit 350.

  In the present embodiment, the application specified during the application download process is configured to perform prelink processing for the device in a server with abundant resources such as memory and CPU power, not in the embedded device. A pre-linked application for a device can be provided to an embedded device with poor resources such as a memory and a CPU.

Next, a second embodiment of the present invention will be described.
Referring to FIG. 4, in the second embodiment of the present invention, the prelink system of the present invention includes a server 400, a server 500, and an embedded device 600.

The server 400 stores an application and performs a prelink process when an application is requested. The server 500 stores a symbol / address correspondence table for each device.
The embedded device 600 transmits an application request, information that can identify the device, and a URL indicating the location of the symbol / address correspondence table, and acquires a prelinked application.

  The server 400 includes an application storage unit 410, a prelink unit 420, and an application transmission unit 430.

  The application storage unit 410 stores an application. The prelink unit 420 performs prelink processing using the symbol, address, and correspondence table for the device received by sending the device identification information to the server 500. The application sending unit 430 sends the pre-linked application to the embedded device 600.

  The server 500 includes a device identification information acquisition unit 510, a symbol / address correspondence table storage unit 520, a correspondence table selection unit 530, and a correspondence table transmission unit 540.

  The device identification information acquisition unit 510 acquires device identification information transmitted from the server 400. The correspondence table storage unit 520 stores a symbol and address correspondence table for various embedded devices. The correspondence table selection unit 530 selects a corresponding correspondence table from the information obtained by the device identification information acquisition unit 510. The correspondence table sending unit 540 sends the selected correspondence table to the server 400.

  The embedded device 600 includes an application request unit 610, an application reception unit 620, and an application storage unit 630.

  The application request unit 610 sends an application request to the server 400, information that can specify a device, and information that includes at least the URL of the server 500. The application receiving unit 620 receives a prelinked application from the server 400. The application storage unit 630 stores the received application.

Next, the overall operation of the present embodiment will be described in detail with reference to the sequence chart of FIG.
(1) Step S201
The embedded device 600 sends an application request, information that can specify the device, and information including at least the URL of the server 500 to the server 400.
(2) Step S202
The server 400 sends information including at least information that can identify the device to the server 500, and the server 500 acquires the information.
(3) Step S203
The server 500 uses the acquired information to select a correspondence table from the symbol-address correspondence table storage unit 520 using the correspondence table selector 530.
(4) Step S204
The server 500 sends the selected correspondence table to the server 400.
(5) Step S205
The server 400 performs prelink processing for the application using the correspondence table acquired from the server 500.
(6) Step S206
The server 400 sends the pre-linked application to the embedded device 600, and the embedded device 600 receives the application by the application receiving unit 620.
(7) Step S207
The embedded device 600 stores the received application.

  In this embodiment, since the server 400 is configured to perform application storage and prelink processing, the embedded device 600 only needs to perform communication processing with respect to the server 400, so that the configuration of the embedded device is simplified. Can be Since the server 400 and the server 500 can be connected via a high-speed line, the transfer of the symbol-address correspondence table requires almost no overhead.

Next, specific examples will be described.
As shown in FIG. 6, the prelink system of the present invention may include a mobile phone 700, an application management server 800, and a prelink server 900. Here, the mobile phone 700 indicates the embedded device 300 or the embedded device 600. The application management server 800 indicates the server 100 or the server 400. The prelink server 900 indicates the server 200 or the server 500.

  The mobile phone 700 is a mobile phone from which an application can be downloaded. The application management server 800 is a server managed by the content provider. The prelink server 900 is a prelink server managed by a mobile phone manufacturer.

Each of these devices generally operates as follows.
The cellular phone 700 issues an application request to the application management server 800 using a wireless line. Application management server 800 returns application information to mobile phone 700. The cellular phone 700 transmits the information to the prelink server 900 using a wireless line. The prelink server 900 acquires an application from the application management server 800 using a high-speed line, performs prelink processing, and transmits the prelinked application to the mobile phone 700 using a wireless line. Mobile phone 700 stores the pre-linked application.

  INDUSTRIAL APPLICABILITY According to the present invention, it can be applied to uses such as high-speed prelink processing suitable for various embedded devices and realization of embedded devices that require high-speed application activation. In addition, it can be applied to applications such as realization of fast startup response performance for embedded devices having the function of downloading applications after shipment. In addition, it is possible to apply various applications for embedded devices to applications such as easy management.

The features of the present invention will be described below.
The prelink system of the present invention includes a means for storing a correspondence table group of symbols and addresses for various embedded devices, a means for selecting a specific correspondence table from the correspondence table group, and a preprocessor for an application using the correspondence table. And a means for performing a link.

  Further, the prelink system of the present invention includes means for storing a correspondence table group of symbols and addresses for various embedded devices, means for selecting a specific correspondence table from the correspondence table, and prelinking the correspondence table. Means for transmitting to a server to perform, and means for performing a prelink process using a correspondence table when a specified application is requested.

  The correspondence table storage means includes means for obtaining a symbol-address correspondence table for each device from the embedded device information storage means of the embedded device manufacturer.

  The prelink system of the present invention further includes means for performing a prelink process in the application download process.

  The prelink method of the present invention is characterized by responding to a request from an embedded device, selecting a symbol / address correspondence table corresponding to the embedded device, and performing an application prelink process for the embedded device. .

  The pre-linking method of the present invention acquires a symbol and address correspondence table of the embedded device from the server storing and managing the correspondence table when an application download request is received from the embedded device, and stores it in the embedded device during the download process. An adaptive prelink process is performed.

  Furthermore, the prelink method of the present invention is characterized in that prelink processing is performed on the server side.

  A program according to the present invention causes a computer to execute a request process for requesting an application to be downloaded, an information transmission process for transmitting information including at least information for specifying a device, and a reception process for receiving an application. .

  The program of the present invention uses a storage process for storing a correspondence table group of symbols and addresses for various embedded devices, a selection process for selecting a correspondence table for an embedded device designated from the correspondence table group, and a correspondence table. A prelink process for performing prelink is executed by a computer.

  A program according to the present invention causes a computer to further execute a process of communicating information with an embedded device.

  The embedded device of the present invention is characterized by comprising application request means, means for transmitting information including at least information for specifying the embedded device, and means for receiving a prelinked application.

  The server of the present invention uses a storage means for storing a correspondence table group of symbols and addresses for various embedded devices, a selection means for selecting a correspondence table for embedded devices designated from the correspondence table group, and a correspondence table. And a prelink means for performing a prelink process for performing a prelink.

  As described above, the prelink system of the present invention includes an application specifying unit included in an embedded device, a unit transmitting information specifying the device to a prelink server, a prelink unit included in the prelink server, and each embedded device. Means for storing a correspondence table of symbols and addresses related to the library held by the computer. When the embedded device downloads the application, the prelink server performs the prelink operation for the identified application using the symbol / address correspondence table corresponding to the identified device. Operate to transfer the registered application to the embedded device.

FIG. 1 is a diagram showing the configuration of the prior art. FIG. 2 is a block diagram showing the configuration of the first embodiment of the present invention. FIG. 3 is a sequence chart showing the operation of the first embodiment of the present invention. FIG. 4 is a block diagram showing the configuration of the second embodiment of the present invention. FIG. 5 is a sequence chart showing the operation of the second embodiment of the present invention. FIG. 6 is a diagram showing a specific embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Conventional prelink system 11 Symbol and address correspondence table preparation part 12 Unresolved symbol extraction part 13 Correspondence table search part 14 Symbol resolution part (prelink part)
DESCRIPTION OF SYMBOLS 20 Library 30 Application 40 Symbol-resolved library 50 Symbol-resolved application 100 Server for storing application 110 Application storage unit 120 Application information transmitting unit 130 Application transmitting unit 200 Server for performing prelink processing 210 Application information acquiring unit 220 Application acquisition Unit 230 device identification information acquisition unit 240 symbol and address correspondence table storage unit 250 correspondence table selection unit 260 prelink unit 270 application transmission unit 300 embedded device 310 application request unit 320 application information transmission unit 330 device identification information transmission unit 340 application reception Section 350 Application storage section 400 Stores applications Server that performs pre-link processing 410 Application storage unit 420 Pre-link unit 430 Application transmission unit 500 Server that stores symbol-address correspondence table 510 Device identification information acquisition unit 520 Symbol-address correspondence table storage unit 530 Correspondence table selection unit 540 Correspondence table sending unit 600 Embedded device 610 Application request unit 620 Application receiving unit 630 Application storage unit 700 Mobile phone 800 Application management server 900 Prelink server

Claims (11)

A correspondence table storage unit for storing a correspondence table group of symbols and addresses for embedded devices;
A correspondence table selection unit for selecting a specific correspondence table from the correspondence table group;
A prelink system comprising: a prelink unit that performs prelink to an application using the correspondence table. The prelink system according to claim 1,
An application acquisition unit for acquiring the application;
A device specifying information acquisition unit for acquiring device specifying information including information for specifying the embedded device;
Application transmitting unit that transmits the prelinked application to the embedded device after the prelink unit prelinks the application using the correspondence table selected by the correspondence table selecting unit according to the device specifying information A prelink system further comprising: The prelink system according to claim 1,
A correspondence table sending unit that transmits the correspondence table to a server that performs pre-linking,
The prelink unit performs prelink processing using the correspondence table when the application is requested in the server that performs the prelink. An application requesting unit that requests downloading of the application;
A device identification information sending unit that transmits device identification information including information identifying the embedded device;
An embedded device comprising: an application receiving unit that receives a pre-linked application transmitted in response to the application download request and the device identification information. The embedded device according to claim 4,
An embedded device, further comprising: an application information transmitting unit that transmits information including application information received in response to a download request for the application and location information of the application. Selecting a symbol-address correspondence table corresponding to the embedded device in response to a request from the embedded device; and
Performing a prelink process of an application for the embedded device. The pre-linking method according to claim 6, wherein
Obtaining the application;
Obtaining device specifying information including information for specifying the embedded device;
Pre-link processing the application using the correspondence table selected according to the device identification information, and transmitting the pre-linked application to the embedded device. The pre-linking method according to claim 6, wherein
Obtaining the correspondence table from a server that stores and manages a correspondence table of symbols and addresses of the embedded device at the time of an application download request from the embedded device;
Pre-link processing adapted to the embedded device in the process of downloading the application. Requesting the application to be downloaded;
Transmitting device specifying information including information specifying an embedded device requesting the application;
Receiving a pre-linked application transmitted in response to the application download request and the device specifying information. A pre-link method. The pre-linking method according to claim 9, wherein
A prelink method further comprising a step of transmitting information including application information received in response to a download request for the application and location information of the application.   The program for making a computer perform the prelink method as described in any one of Claims 6 thru | or 10.

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