WO2014019367A1

WO2014019367A1 - Method and device for redeploying multilevel storage

Info

Publication number: WO2014019367A1
Application number: PCT/CN2013/072953
Authority: WO
Inventors: 周巍
Original assignee: 华为技术有限公司
Priority date: 2012-07-30
Filing date: 2013-03-20
Publication date: 2014-02-06
Also published as: CN102831178B; CN102831178A

Abstract

Embodiments of the invention disclose a method and a device for redeploying multilevel storage, and relates to the technical field of information. Redeployment of a redirection file symbol can be implemented without modifying a source code. The implementing method of the present invention comprises: acquiring current location information of a to-be-redeployed symbol from a redirection file; and redeploying the to-be-redeployed symbol according to the current location information of the to-be-redeployed symbol. The embodiments of the invention are mainly used for a redeploying process of a multilevel storage.

Description

Multi-level storage redeployment method and device

The present invention relates to the field of information technology, and in particular, to a method and apparatus for redeploying multi-level storage.

Background technique

In software code development, there are a large number of redirect files provided by third parties in the form of libraries. The code in the redirect files is deployed to different levels of memory by means of multi-level storage. These can be directly used in software code development. Oriented files improve the efficiency of code development. Because the purpose of software development is different, the frequency of the symbols provided in the redirect file will be different. Direct use of the redirect file provided by the third party will result in the efficient use of memory at all levels. Therefore, it is usually necessary to redeploy the storage location of each code in the redirect file, so as to fully exploit the advantages of speed, capacity, and cost in each level to achieve optimal cost performance.

In order to improve the cost performance of the multi-level storage, it is necessary to adjust the storage location of each symbol in the redirect file. The redeployment method of the multi-level storage provided by the prior art is: First, specify the section attribute for each symbol when the source code is compiled. Multiple symbols can share a node attribute, and then compiled into a re-directable file by the compiler, the mapping relationship between the section and the memory block is written into the link script, and then an image file is generated to complete the symbol deployment. Then, by modifying the mapping relationship between the section and the memory block in the link script, the image file is regenerated to complete the symbol redeployment.

In the implementation of the above-described multi-level storage redeployment method, the inventor has found that at least the following problems exist in the prior art: Since the symbol and the section are bound in the redirect file, the mapping relationship between the section and the memory block in the link script is modified. Adjustments can only be made at the section level, and individual symbols cannot be redeployed. By assigning a different section attribute to each symbol at compile time, you can modify the storage location of a single symbol, but you need to get the source code, and the compilation of the source code requires a lot of labor costs. Summary of the invention

Embodiments of the present invention provide a method and apparatus for redeploying multi-level storage, which can implement redeployment of redirected file symbols without modifying source code.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

In an aspect, the embodiment of the present invention provides a method for re-deploying a multi-level storage, including: acquiring current location information of a symbol to be redeployed from a redirect file; and performing, according to current location information of the symbol to be redeployed. The symbol to be redeployed is redeployed.

In another aspect, the embodiment of the present invention provides a multi-level storage re-deployment apparatus, including: a first acquiring unit, configured to acquire current location information of a symbol to be redeployed from a redirect file; and a redeployment unit, configured to The current location information of the symbol to be redeployed redeploys the symbol to be redeployed.

The method and device for re-deploying the multi-level storage provided by the embodiment of the present invention, the current location information of the symbol to be redeployed is obtained from the redirect file, and the current location information of the symbol to be redeployed is to be redeployed according to the current location information of the symbol to be redeployed. The symbol is redeployed. Compared with the prior art method of redeploying only at the node level, only the symbols that need to be redeployed are trimmed in the redirect file, and the specified symbol is not deleted by modifying the source code. , you can granularize the implementation of multi-level storage redeployment to the symbol level, reducing costs.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description It is merely some embodiments of the present invention, and those skilled in the art can obtain other drawings according to these drawings without any creative work.

1 is a flowchart of a method for redeploying multi-level storage according to an embodiment of the present invention;

2 is a flowchart of a method for redeploying multi-level storage according to an embodiment of the present invention;

3 is a schematic flowchart of a multi-level storage according to an embodiment of the present invention;

4 is a schematic diagram of a composition of a redirect file according to an embodiment of the present invention; FIG. 5 is a schematic diagram of symbol deployment in a redirect file according to an embodiment of the present invention; FIG. 6 is a schematic diagram of a link script according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of redistribution of symbols in a redirect file according to an embodiment of the present invention;

8 is a flowchart of another method for redeploying multi-level storage according to an embodiment of the present invention;

FIG. 9 is a flowchart of another method for redeploying multi-level storage according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of another redirect file according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a re-deployment apparatus of a multi-level storage according to an embodiment of the present invention; FIG. 12 is a schematic diagram of another multi-level storage re-deployment apparatus according to an embodiment of the present invention; Schematic diagram of the composition of the heavy storage device of the level storage. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

An embodiment of the present invention provides a method for redeploying multi-level storage, as shown in FIG. 1, including:

101. Obtain current location information of the symbol to be redeployed from the redirect file.

The redirect file is a binary object file, which is generated after being compiled by the source code, used to link with other target files, create an executable file or share the code or data of the target file, and any multi-level storage method. After compiling the source code after writing the source code, a redirect file is generated, and the redirect file can be provided by a third party that provides the redirect file. The symbol may be a variable or a function in the source code, etc., and a specific symbol to be re-deployed may be predetermined before redeployment, for example, providing a symbol name corresponding to the symbol to be redeployed. The redirection file that has been stored in the computer hard disk can be opened by reading the current location information of the symbol to be deployed, and the redirection file is read into the memory, and from the redirection file. Get the current location information of the symbol that needs to be redeployed.

102. The symbol to be redeployed according to current location information of the symbol to be redeployed Number for redeployment.

Wherein, when the symbol in the redirect file is not used in the generated program, or the symbol to be redeployed needs to be moved from the current storage location to another storage location, the The current location information of the redeployed symbol modifies the storage location information of the symbol to be redeployed in the redirect file to implement redeployment of the symbol to be redeployed.

It can be understood that if the symbol in the redirect file is not used in the generated program, the unused symbol can be used as the symbol to be redeployed, and the symbol to be redeployed is deleted. The redeployment of the symbol to be redeployed, after the link, the symbol to be redeployed is not loaded into the memory occupying memory space, which saves memory space.

The method for re-deploying the multi-level storage provided by the embodiment of the present invention obtains the current location information of the symbol to be redeployed from the redirection file by parsing the redirection file, and according to the current location information of the symbol to be redeployed. Re-deploy the symbols for redeployment. Compared with the attribution section of the symbol in the source code in the prior art, by parsing the redirected file, the current location information of the symbol to be redeployed can be directly obtained, and only the symbol that needs to be redeployed is changed to the storage location. The symbol that does not need to be redeployed does not change the storage location, not only can the multi-level storage redeployment implementation object be granular to the symbol level, and the source code does not need to be modified, thereby reducing the cost of redeployment.

An embodiment of the present invention provides another method for redeploying multi-level storage. As shown in FIG. 2, the method includes:

201. Query a symbol table in the redirect file according to a symbol name of the symbol to be redeployed, and obtain a start address and a symbol length of the symbol to be redeployed.

The symbol name to be redeployed is a name of a variable or a function that needs to be cropped or changed, and the symbol to be redeployed is defined when the source code is written. The redirection file in this embodiment uses an Executable and Linkable Format (ELF) as an example to illustrate a redeployment method of multi-level storage. However, the redirect file is not limited to ELF files. This method can also be used to implement multi-level storage redeployment for the common object file format (COFF) and the executable file format (Portable Execute, PE).

Multi-level storage is generally implemented as shown in Figure 3 (a): First, the source code is generated on the code development platform according to the software function, as shown in Figure 3 (b), the source code is completed according to the function, which is based on the function requirements. Symbols are defined. For example, int a defines a variable named a, int funa ( ) defines a function named funa, and so on. As shown in Figure 3 (c), the definition of the section, the definition of the attribute - ((section (".1 1.data"))) is to put the symbol into the section named ll.data In the festival area. Then, as shown in Fig. 3 (d), the relationship between the symbol and the section is mapped in the source code. In the figure, LI DATA int a indicates that the variable a is placed in the specified section of the section named ll.data. in. Compile the above code into a resizable file in binary format, and store the memory map as shown in Figure 3 (e). By modifying the link script, establish the mapping relationship between the section and the specified memory block. Finally, the file can be redirected. The link script generates an image file through a link to the linker. At this point, as shown in Figure 3 (f), after multi-level storage, each symbol determines the location of the deployed memory.

The internal composition of the redirect file is as shown in FIG. 4, and the redirect file includes a file control header, a section area, a symbol table, and a section header table. Each symbol corresponds to an entry in the symbol table, and each symbol table entry includes a start address of the symbol, a symbol length, an offset of the symbol in its corresponding section, and a section index number corresponding to the symbol. Each section corresponds to the control header in the section header table, and also contains the starting address of each section. The querying the symbol table in the redirect file according to the known symbol name, for example, assuming that the symbol name to be redeployed is a, and finding the symbol named a of the symbol to be redeployed in the symbol table As shown in FIG. 5, the starting address Y of the symbol a in the memory and the length M of the memory space occupied by the symbol a in the memory are obtained from the table entry. In the embodiment of the present invention, the starting address of the symbol is the offset of the starting position of the symbol from the file control head, for example, the starting address Y of the symbol a is the offset of the starting position of the symbol a from the file control head. . In addition, the symbol table of the redirected file may be queried by the symbol name of the symbol to be redeployed, and the section of the section where the symbol to be redeployed is located is named section A (section A).

202. Calculate, according to a start address and a symbol length of the symbol to be redeployed, an end address of the symbol to be re-deployed.

The ending address of the symbol to be redeployed in the embodiment of the present invention is the offset of the end position of the symbol to be redeployed from the file control header, and the start address of the symbol to be redeployed and the The length of the memory space occupied by the symbols to be redeployed is obtained. The starting address of the symbol to be redeployed and the length of the memory space occupied by the symbol can be obtained by the method described in step 201.

For example, after the start address Y of the symbol a to be redeployed and the length M of the symbol a to be redeployed are obtained in step 201, the start address Y is added to the length M, as shown in FIG. 5, to be redeployed. The end address Z of the symbol a.

203. Query the link script according to the target memory block name to obtain the target section name.

The target memory block name is usually a given known condition. For example, the target location of the symbol that has been determined to be redeployed is specifically a memory block named L2TEXT_seg in the memory block. A memory block corresponds to a section. As shown in FIG. 6, the memory block name L2TEXT_seg is queried, and the connection script is obtained, and the section of the target section to which the symbol is expected to be deployed is named section B (section B). The link script is a defined file, and a mapping relationship between the section and the specified memory is established in the link script. In the multi-level storage, before the source code is written, the relationship between the symbol and the section is mapped in the source code. , just conceptually bind the symbol to the section. By compiling the source code, generating a redirect file, allocating memory space for the symbol, this memory space is a logical memory space, and the variable is not put into the actual physical memory, and the redirect file needs to be The link script links and generates an image file, and then the specific location where each symbol is deployed in the memory is determined. This specific location is determined by the mapping of the node to the memory.

204. Query a section header table according to the target section name, and obtain the target section. Start address and target segment length.

The target section name may be obtained by the method described in step 203, and the length of the section entry corresponding to the target section name in the section header table of the redirect file. The starting address of the target node is the offset of the starting position of the target node from the file control head.

For example, according to the section name sectionB obtained in step 203, the section table entry corresponding to the section name is found in the section header table, and the start address of the section section section B is obtained from the section entry of the sectionB. W and the length of the memory space occupied by the target section section B in the memory, the specific storage location is shown in Figure 5. .

Correspondingly, according to the section name section A of the section where the symbol currently located in step 201 is located, the section item corresponding to the section area named sectionA can also be found through the section header table, and is obtained from the section table item of section A. To the start address E of the section area A where the symbol a is currently located, the specific storage location is as shown in FIG. 5.

205. Calculate, as the target location information, an end address of the target node according to a start address of the target node and a target segment length.

The end address of the target section is the end position of the target section and is controlled by the file. The starting address of the target section and the length of the target section may be obtained by the method described in step 204.

For example, after obtaining the start address W of the target node area and the length V of the memory space occupied by the target node area in the step 204, the start address W of the target node area is added to the length V to obtain the target section. The end address X of the area, the specific storage location is shown in Figure 5.

In the embodiment of the present invention, after determining the current location information of the symbol to be redeployed and determining the target location information of the symbol to be redeployed through steps 203-205, the foregoing steps 201-202 may be performed. The symbols to be redeployed in the redirect file are redeployed. The specific steps are as follows: 206. Move the symbol to be redeployed from a current location to a target location according to current location information and target location information of the symbol to be redeployed.

The moving the symbol to be redeployed to the target location may first determine a relative relationship between the target location and the current location. Still taking FIG. 5 as an example, the starting address Y of the symbol a to be redeployed is obtained through step 201, and the starting address W of the target node section B is obtained by step 204, and the relationship between W and Y is compared, if W is greater than Y, it can be determined that the current position is after the target position, and if W is less than Y, it can be determined that the current position is before the target position. Or, by step 204, obtaining a starting address W of the target node section B and a starting address E of the section area A where the symbol a to be redeployed is currently, and comparing the relationship between W and E. If W is greater than E, It can also be determined that after the current position is after the target position, if W is less than E, it can also be determined that the current position is before the target position. It can be understood that the relative relationship between the target location and the current location can be obtained by using various methods, which is not limited by the embodiment of the present invention.

The method for moving the symbol to be deployed from the current location to the target location may be: changing a starting address of the symbol to be redeployed in the memory space to an ending address of the target node in the memory space, thereby The symbol to be redeployed is redeployed to the last position of the target section. For example, as shown in FIG. 7, after the target location is after the current location, the memory space start address Y of the symbol a to be redeployed is changed to the end address X of the target node section B in the memory space, thereby The symbol a to be redeployed is redeployed to the last position of the target section sectionB, and the symbol a to be redeployed becomes the symbol a after deployment.

207. Redeploy the associated section or symbol.

The association section or symbol includes: a section or a symbol between the start address of the symbol to be redeployed and the end of the target section, or the end address of the symbol to be redeployed A section or symbol between the end addresses of the target section.

The specific movement is: when the current position of the symbol to be redeployed is behind the target position, the section or symbol between the start address of the symbol to be redeployed and the end address of the target section is backward (to the section) The area head table direction) moves the symbol length of the symbol to be redeployed; When the current position of the symbol to be redeployed is before the target position, the section or symbol between the end address of the symbol to be redeployed and the end address of the target node is forwarded (to the file control head) Direction) Moves the symbol length of the symbol to be redeployed.

For example, as shown in FIG. 7, since the current position is after the target position, the symbol or the section between the address X and the address Y in the memory space is sequentially moved backward (toward the section header table). The symbol length size of the symbol to be redeployed. For the determination of the relative relationship between the current location and the target location, refer to step 206, and details are not described herein again.

It should be noted that those skilled in the art can understand that steps 206 and 207 do not necessarily follow the sequence described in the embodiment of the present invention. In a specific case, step 207 may also be before step 206 for the convenience of redeployment. That is, adjust the position of the associated section or symbol first, and then adjust the position of the symbol to be redeployed.

208. Modify a symbol table, a section header table, and a file control header corresponding to the redirected file according to the location information of the re-deployed symbol and the location information of the node.

The information of the symbol a after the redeployment symbol a is changed in the symbol table, the related information in the symbol table, the target node area, and the related information in the section header table of the current section and The related information in the control file of the redirect file can be modified correspondingly, and the modification method is as follows:

• Modify the symbol table according to the symbol after re-deployment and the position information of the section: Query the symbol table, the same symbol as the index number of the original node of the symbol a (that is, the symbol originally belonging to the same section as the symbol a), The offset in the symbol in the symbol is greater than the offset of the symbol a in the section minus the offset of the symbol a in the section; modifying the current section index number of the symbol a in the symbol table An index number that points to the target section; the value of the offset of the symbol a in the current section in the modified symbol table is the size of the memory space originally occupied by the target section.

• Modify the section header table according to the re-deployed symbol and the location information of the section: modify the length of the current section in the control section of the current section minus the length of the symbol; modify the section header table The length of the target node area in the target node control header increases the length of the symbol; queries the start address of other section areas in the section header table, determines whether other section areas are associated nodes, and repairs accordingly Change the starting address of the associated section. For example, by the relative relationship between the target position and the current position in step 206, if the current position is after the target position, the starting address for the other nodes is greater than or equal to the end address of the target node and less than the start of the symbol a. The address, the length of the symbol a or the start address of the section in the section header table is sequentially increased by the length M of the symbol a; if the current position is before the target position, the starting address of the other section is greater than or equal to the symbol a The start address is smaller than the end address of the target section, and the length of the symbol a is sequentially increased by the conditional symbol or the start address of the section in the section header table.

• Modify the file control header according to the symbol after re-deployment and the location information of the section: Query the start address of other sections in the file control header, and determine whether other sections are determined by the relative relationship between the target location and the current location in step 206. Associated sections. If the current position is after the target position, if the starting address of a certain section is greater than or equal to the end address of the target section and is smaller than the starting address of the symbol a, it is determined as the associated section, and the associated section in the file control header is The starting address including the associated symbol in the associated section is sequentially added with the length M of the symbol a; if the current position is before the target position, if the starting address of a certain section is greater than or equal to the starting address of the symbol a and smaller than the target section The end address of the area is determined as the associated node, and the start address of the associated node in the file control header is added to the length M of the symbol a.

In this embodiment, after the symbol table, the section header table, and the file control header corresponding to the redirect file are modified, the modified redirect file is saved, and the modified information is saved to the hard disk. The repair information is saved from the memory to the redirect file, and the modification of the redirect file is completed. As shown in FIG. 3, the modified redirect file and the link script are passed through the linker. Linking, the symbol to be redeployed is redeployed from the current location to the target location, and the storage location of the deployed symbol in the memory is re-determined.

In another application scenario of the embodiment of the present invention, as shown in FIG. 8, steps 301 and 302 are the same as step 201 and step 202, respectively, and details are not described herein again.

Step 303, create a new section.

Wherein, for a scene in which the target node position cannot be determined or a scene in which the symbol target node position is not specified, a new section may be newly created to obtain the target position information. As shown in Figure 10, At the end of all the sections in the redirect file, add a new section, assuming that the newly added section is named sectionB, adding the starting address and the section size of the newly added section to the section header. In the table, add a section header entry. At this time, the newly added section has no actual physical memory space. To modify the link script, as shown in FIG. 6, a section rule is added in the link script to establish a mapping between the newly created section and the memory block. relationship. The memory block is a free memory block found by looking at the link script.

Step 304: The starting address of the newly created section is used as the target location information.

The new node is used as the target node of the symbol, and the starting address of the newly created node is the target location information.

Step 305 to step 307 correspond to step 206 to step 208 respectively, and the common technology in the art will not be described herein.

In another scenario application scenario of the present invention, as shown in FIG. 9, if the symbol to be redeployed is not used in the generated program, the symbol to be redeployed may be deleted, thereby saving memory space. Includes:

Step 401: Query a symbol table in the redirect file according to the symbol name of the symbol to be redeployed, and obtain a start address and a symbol length of the symbol to be redeployed.

For the specific method for obtaining the starting address and the symbol length of the symbol to be re-deployed, refer to step 201 in this embodiment, and details are not described herein again.

Step 402: Calculate an end address of the symbol to be redeployed according to a start address and a symbol length of the symbol to be redeployed.

For the specific calculation method of the end address of the symbol to be redeployed, refer to step 202 in this embodiment, and details are not described herein again.

In addition, the symbol table of the redirected file may be queried by using the symbol name of the symbol to be redeployed, and the name of the section of the node in which the symbol to be redeployed is currently located may be obtained.

It should be noted that the start address, the end address, and the length of the symbol to be redeployed are obtained as the current location information of the symbol to be redeployed through the steps 201-202. Step 403: Delete the symbol to be redeployed from the current location according to the current location information of the symbol to be redeployed.

The symbol to be redeployed is found according to the symbol name of the symbol to be redeployed, and the symbol to be redeployed is deleted from the memory space.

Step 404: Redeploy the associated section or symbol.

The associated node or symbol refers to a section or symbol adjacent to the symbol to be redeployed or the symbol to be redeployed adjacent to the symbol to be redeployed. The specific modification method is: subtracting the length of the symbol to be redeployed from all the symbols and the starting address of the node in the memory space whose starting address is greater than or equal to the ending address of the symbol to be redeployed.

Step 405: Modify the symbol table, the section header table, and the file control header corresponding to the redirect file according to the location information of the re-deployed symbol and the location information of the section.

The symbol to be redeployed may be deleted, and the information about the deleted symbol in the redirected file may be related information in the symbol table, related information in the section header table, and related information in the redirecting file control header. Corresponding to the modification, the modification method is as follows:

Query the symbol table, and modify all the symbols in the symbol table that have the same section index number as the deleted symbol in the symbol table. The offset in the section is greater than the offset of the deleted symbol in the section. The offset of the deleted symbol in the section is subtracted; the corresponding symbol table entry in the redirected file is deleted.

Query the section header table, modify the length of the current section in the section control header where the deleted symbol in the section header table is the current section length minus the length of the deleted symbol; query the section header table The start address of all the sections whose start address is greater than the end address of the deleted symbol is sequentially subtracted from the length of the deleted symbol.

The file control header is queried, and the start address of all the sections of the file control header whose start address is greater than the end address of the deleted symbol is sequentially subtracted from the length of the deleted symbol.

The method for re-deploying the multi-level storage provided by the embodiment of the present invention obtains the current location information of the symbol to be redeployed from the redirection file by parsing the redirection file, and according to the current location information of the symbol to be redeployed. Re-deploy the symbols for redeployment. And prior art Compared with the attribution section of the symbol in the source code, by resolving the redirected file, the current location information of the symbol to be redeployed can be directly obtained, and only the symbol that needs to be redeployed is changed to the storage location, The deployed symbols do not change the storage location, not only can granularize the redeployed implementation objects of multi-level storage to the symbol level, and do not need to modify the source code, thereby reducing the cost of redeployment.

And, the symbols that will be used in the generated program that need to be redeployed are added to the target location, and the information related to the symbol is modified. For the scene in which the memory space is insufficient and cannot be linked during the linking process, the symbol can be added to the scene. Idle destination, complete the link.

The embodiment of the present invention further provides a multi-level storage re-deployment device. As shown in FIG. 11, the first embodiment includes: a first obtaining unit 31 and a redeploying unit 32.

The first obtaining unit 31 is configured to obtain current location information of the symbol to be redeployed from the redirect file.

The redeployment unit 32 is configured to redeploy the symbol to be redeployed according to the current location information of the symbol to be redeployed acquired by the first acquiring unit.

In an implementation manner, the current location information includes a start address, an end address, and a length of the symbol to be redeployed, and the first acquiring unit 31 is specifically configured to: according to the symbol name of the symbol to be redeployed Querying a symbol table in the redirect file, obtaining a start address and a symbol length of the symbol to be redeployed; and starting a address and a symbol of the symbol to be redeployed acquired according to the first obtaining unit Length calculating the end address of the symbol to be redeployed, and the redeploying unit 32 is configured to perform heavy weighting on the symbol to be redeployed according to the current location information of the symbol to be redeployed acquired by the first acquiring unit deploy.

In another implementation, the redeployment unit 32 is specifically configured to: delete the symbol to be redeployed from the current location according to current location information of the symbol to be redeployed acquired by the first acquiring unit.

The embodiment of the present invention provides another multi-level storage re-deployment apparatus. As shown in FIG. 12, the multi-level storage re-deployment apparatus may further include: a second acquisition unit 33.

The second obtaining unit 33 is configured to obtain, before redeploying the symbol to be redeployed, Taking the target location information to be deployed of the symbol to be redeployed.

Correspondingly, the redeploying unit 32 is specifically configured to: according to the current location information of the symbol to be redeployed acquired by the first acquiring unit, and the target location information acquired by the second acquiring unit, The redeployed symbol moves from the current location to the target location.

Further, in an implementation manner, the second obtaining unit 33 is specifically configured to: query a link script according to the target memory block name to obtain a target section name; and query the section of the redirect file according to the target section name a header table, obtaining a start address of the target node area and a target node area length; calculating an end address of the target node area as the target location information according to the start address of the target node area and the target node area length . In another implementation manner, the second obtaining unit 33 is specifically configured to: create a new section; and use the starting address of the newly created section obtained by the new module as the target location information.

Further, the redeployment unit 32 is further configured to: redeploy the associated node or symbol, where the associated node or symbol includes: a start address of the symbol to be redeployed and an end address of the target node An internode or symbol, or a section or symbol between the end address of the symbol to be redeployed and the end address of the target section.

An embodiment of the present invention provides another multi-level storage re-deployment apparatus. As shown in FIG. 13, the multi-level storage apparatus further includes: a modifying unit 34, configured to: according to the location information of the re-deployed symbol and the node area The location information modifies the symbol table, the section header table, and the file control header included in the redirect file.

In the above device embodiment, the format of the redirect file includes: an executable link file format ELF, a common object file format COFF, or an executable file format PE.

It should be understood that the specific description of all the steps in this embodiment may refer to the corresponding content in the method embodiment, and is not described again here.

The method for re-deploying the multi-level storage provided by the embodiment of the present invention obtains the current location information of the symbol to be redeployed from the redirection file by parsing the redirection file, and according to the current location information of the symbol to be redeployed. Re-deploy the symbols for redeployment. Compared with the attribution section of the symbol in the source code in the prior art, by parsing the redirect file, Obtain the current location information of the symbol to be redeployed, and change the storage location only for the symbol that needs to be redeployed, and change the storage location for the symbol that does not need to be redeployed, not only can the implementation object of the redeployment of the multi-level storage be granular to Symbol level, and no need to modify the source code, thus reducing the cost of redeployment.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. . Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. A hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

claims

1. A multi-level storage redeployment method, characterized by including:

Obtain the current location information of the symbol to be redeployed from the redirection file;

The symbols to be redeployed are redeployed according to the current location information of the symbols to be redeployed.

2. The method according to claim 1, characterized in that, the current location information includes the start address, end address and symbol length of the symbol to be redeployed, and the information of the symbol to be redeployed is obtained from the redirection file. Current location information, specifically including:

Query the symbol table in the redirection file according to the symbol name of the symbol to be redeployed, and obtain the starting address and symbol length of the symbol to be redeployed;

The end address of the symbol to be redeployed is calculated based on the start address and symbol length of the symbol to be redeployed.

3. The method according to claim 1 or 2, characterized in that, before redeploying the symbols to be redeployed, the method further includes:

Obtain the target location information to be deployed of the symbol to be redeployed;

The redeployment of the symbols to be redeployed according to the current location information of the symbols to be redeployed specifically includes:

According to the current position information and target position information of the symbol to be redeployed, the symbol to be redeployed is moved from the current position to the target position.

4. The method according to claim 3, characterized in that said obtaining the target location information to be deployed of the symbol to be redeployed specifically includes:

Query the link script according to the target memory block name and obtain the target section name;

Query the section header table of the redirected file according to the target section name, and obtain the starting address and target section length of the target section;

According to the start address of the target section and the length of the target section, the end address of the target section is calculated as the target location information.

5. The method according to claim 3, characterized in that: obtaining the to-be-redeployed The target location information of the symbol to be deployed includes:

Create a new section;

And the starting address of the newly created section is used as the target location information.

6. The method according to claim 1, characterized in that: redeploying the symbols to be redeployed according to the current location information of the symbols to be redeployed specifically includes: redeploying the symbols according to the current location information of the symbols to be redeployed. The symbol to be redeployed is deleted from the current location according to the current location information of the symbol.

7. The method according to claim 4, characterized in that, after redeploying the symbols to be redeployed according to the current location information and target location information of the redeployed symbols, the method further includes:

Redeploy associated sections or symbols, and the associated sections or symbols include: sections or symbols between the starting address of the symbol to be redeployed and the end address of the target section, or, the The section or symbol between the end address of the symbol to be redeployed and the end address of the target section.

8. The method according to any one of claims 1 to 7, characterized in that, after redeploying the symbols to be redeployed according to the current location information of the symbols to be redeployed, the method Also includes:

Modify the symbol table, section header table, and file control header contained in the redirection file according to the location information of the redeployed symbol and the location information of the section.

9. The method according to any one of claims 1 to 8, characterized in that the format of the redirection file includes: executable link file format ELF, common object file format COFF or executable file format PE.

10. A multi-level storage redeployment device, characterized by including:

The first acquisition unit is used to obtain the current location information of the symbol to be redeployed from the redirection file;

A redeployment unit, configured to redeploy the symbols to be redeployed according to the current location information of the symbols to be redeployed acquired by the first acquisition unit.

11. The device according to claim 10, wherein the current location information includes the start address, end address and length of the symbol to be redeployed, and the first acquisition unit is specifically configured to: according to the to-be-redeployed symbol The symbol name of the symbol to be redeployed, query the symbol table in the redirection file, and obtain the starting address and symbol length of the symbol to be redeployed; according to the symbol to be redeployed obtained by the first acquisition unit The starting address of the symbol and the symbol length are used to calculate the ending address of the symbol to be redeployed.

12. The device according to claim 10 or 11, further comprising: a second acquisition unit, configured to acquire the symbols to be redeployed before redeploying the symbols to be redeployed. Deployment target location information;

The redeployment unit is specifically configured to: according to the current location information of the symbol to be redeployed acquired by the first acquisition unit and the target location information acquired by the second acquisition unit, symbol is moved from the current position to the target position.

13. The device according to claim 12, wherein the second acquisition unit is specifically configured to: query the link script according to the target memory block name, and obtain the target section name; query the target section name according to the target section name. Redirect the file's section header table to obtain the starting address and target section length of the target section; calculate the end of the target section based on the starting address and target section length of the target section Address, as target location information.

14. The device according to claim 12, characterized in that, the second acquisition unit is specifically configured to: create a new section; use the starting address of the new section obtained by the new module as the target location information .

15. The device according to claim 10, characterized in that the redeployment unit is specifically used for:

The symbol to be redeployed is deleted from the current location according to the current location information of the symbol to be redeployed acquired by the first acquisition unit.

16. The device according to claim 13, wherein the redeployment unit is further configured to: redeploy associated sections or symbols, where the associated sections or symbols include: the symbols to be redeployed The section or symbol between the start address and the end address of the target section, or, The section or symbol between the end address of the symbol to be redeployed and the end address of the target section.

17. The device according to any one of claims 10 to 16, further comprising: a modification unit, configured to modify the redirection file according to the location information of the redeployed symbol and the location information of the section. It contains the symbol table, section header table, and file control header.

18. The device according to any one of claims 10 to 17, characterized in that the format of the redirection file includes: executable link file format ELF, common object file format COFF or executable file format PE.