CN105204937A - Kernel function call method, device and operation system - Google Patents
Kernel function call method, device and operation system Download PDFInfo
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- CN105204937A CN105204937A CN201510714259.7A CN201510714259A CN105204937A CN 105204937 A CN105204937 A CN 105204937A CN 201510714259 A CN201510714259 A CN 201510714259A CN 105204937 A CN105204937 A CN 105204937A
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Abstract
The invention discloses a kernel function call method, comprising the steps of acquiring a name and a parameter of a kernel function, which is input by a user; analyzing the name and the parameter of the kernel function in a user space, acquiring an address and a type of the function and the parameter, and establishing a parameter list; taking the parameter list as a kernel module parameter, and adding a kernel module in a system by using a loaded module instruction; analyzing the parameter list in a kernel space so as to acquire the corresponding function address and parameter value; calling the function according to the function address and parameter value. The invention further discloses a kernel function call device and an operation system thereof.
Description
Technical field
The present invention relates to computer operating system, particularly relate to a kind of kernel function call method, device and operating system.
Background technology
Use in the embedded product of (SuSE) Linux OS, two spaces need be used when program is run: user's space and kernel spacing.Described two spaces are mutually independent.Kernel operates in kernel spacing, and application program, such as user interface etc., operate in user's space.During the service that application program needs use kernel to provide, come by system call.
In addition, usually in some way, such as file (log, message, coredump, proc file, sysfs file etc.) mode, exports to user's space Debugging message, debugs when going wrong with convenient kernel kernel.With file mode derive, need according to specific filespec encode in kernel realize after, could system cloud gray model or generation problem time export to user's space.The file of different-format needs different standard operations.Therefore, if encoded in advance realize file derivation, then corresponding kernel tailoring information cannot be checked.
Summary of the invention
In view of this, the invention provides a kind of kernel function call method, device and operating system, to solve at least one technical matters above-mentioned.
The embodiment of the present invention provides a kind of kernel function call method, comprises step: the kernel function title and the parameter that obtain user's input; Resolve described kernel function title and parameter at user's space, obtain address and the type of function and parameter, and set up parameter list; With described parameter list for kernel module parameter, the instruction that insmods is used to add kernel module in systems in which; Described parameter list is resolved, to obtain respective function address and parameter value at kernel spacing; And call described function according to described function address and parameter value.
The embodiment of the present invention also provides a kind of kernel function call device, at least comprises: name acquiring module, for obtaining kernel function title and the parameter of user's input; First parsing module, is arranged on user's space, for resolving described kernel function title and parameter, obtaining address and the type of function and parameter, and setting up parameter list; Insmod, for described parameter list for kernel module parameter, add kernel module in systems in which; Second parsing module, is arranged on kernel spacing, for resolving described parameter list, obtains respective function address and parameter value; And calling module, for calling described function according to described function address and parameter value.
The embodiment of the present invention also provides a kind of operating system, comprises user's space and kernel spacing.Described user's space at least comprises: name acquiring module, for obtaining kernel function title and the parameter of user's input; First parsing module, for resolving described kernel function title and parameter, obtaining address and the type of function and parameter, and setting up parameter list; And insmod, for described parameter list for kernel module parameter, add kernel module in systems in which.Described kernel spacing at least comprises: the second parsing module, for resolving described parameter list, obtains respective function address and parameter value; And calling module, for calling described function according to described function address and parameter value.
Kernel function call apparatus and method of the present invention, can work as Debugging message when not exporting to user's space, as long as kernel provides debugging interface function, namely this function can be called from user's space, then perform this function at kernel spacing and derive Debugging message, convenient and swift, and highly versatile.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the process flow diagram of the kernel function call method according to the embodiment of the present invention;
Fig. 2 is the parton flow chart of steps of the step S102 of kernel function call method according to the embodiment of the present invention;
Fig. 3 is the sub-step process flow diagram of the step S104 of kernel function call method according to the embodiment of the present invention;
Fig. 4 is the high-level schematic functional block diagram of kernel function call device according to the embodiment of the present invention and operating system.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, more detailed description is further done to technical scheme of the present invention.Obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all should belong to the scope of protection of the invention.
Refer to Fig. 1, it is a kind of kernel function call method that one embodiment of the invention provides.In the present embodiment, described kernel function call method is applied to (SuSE) Linux OS.Said method comprising the steps of:
Step S101, obtains kernel function title and the parameter of user's input.In the present embodiment, user input function name or parameter at least follow following syntax format one of them:
1) function name or name variable [:] [kernel module title];
2) with 32 sexadecimal numbers [:] of 0x beginning;
3) decimal integer [:].
Wherein, character " [] " part represents selective sections, and character ": " represents gets address of variable as parameter, and the part after character " " is kernel module title corresponding to symbol source.In addition, acquiescence gets variate-value as function parameter, can Division identification further when multiple kernel module uses identical designation.Function name or variable name become with letter or " _ " beginning.In the present embodiment, support 8 parameters at most.
Step S102, resolves described kernel function title and parameter at user's space, obtains address and the type of function and parameter, and sets up parameter list.In the present embodiment, described parameter list comprises multiple two tuples, and each two tuples comprise type and the address of each function or parameter, and wherein said type and address all represent by 32 signless integers.That is, in the present embodiment, according to the syntax format of step S101, function or the parameter of user's input is resolved successively.Each function or parameter generate a < type, address > bis-tuple, and type and address all represent by 32 signless integers, and all two tuples form a parameter list successively.
Refer to Fig. 2, more specifically, described acquisition function and the address of parameter and the step of type comprise sub-step:
S102a, obtains functional symbol or address corresponding to pa-rameter symbols.
S102b, obtains the address value in two tuples and obtains 32 signless integer numerical value of sensing core position, address in two tuples, to determine type.
S102c, the parameter list generated passes to described kernel module as array parameter, and the element of described array parameter is 32 signless integers.
In addition, in certain embodiments, when function or variable input with the form of symbol (character string), pass through/proc/kallsyms file, the address that this symbol is corresponding can be inquired.And in further embodiments, when function or variable are with decimal numeral form input, need to convert to hexadecimal representation form corresponding in computing machine.The kernel function to be called of user's input is then according to the mode process of getting location (namely obtaining the address value in two tuples).
Step S103, with described parameter list for kernel module parameter, uses the instruction (such as insmod order) that insmods to add kernel module in systems in which.
Step S104, resolves described parameter list at kernel spacing, to obtain respective function address and parameter value.
Refer to Fig. 3, step S104 specifically comprises sub-step:
Step S104a, from transmitted array parameter, separates out type and respective function or argument address with the formal solution of two tuples of containing type and address; And
Step S104b, obtains function address and parameter values successively according to described type.
Step S105, calls described function according to described function address and parameter value.
Step S106, at the end of kernel function call, deletes described kernel module at user's space.
Adopt kernel function call method of the present invention, Debugging message can be worked as when not exporting to user's space, as long as kernel provides debugging interface function, namely this function can be called from user's space, then perform this function at kernel spacing and derive Debugging message, convenient and swift, and highly versatile.
Refer to Fig. 4, the present invention also provides a kind of kernel function call device 100, and it at least comprises name acquiring module 10, first parsing module 20, insmod the 30, second parsing module 40 and calling module 50.
Concrete, described name acquiring module 10 is for obtaining kernel function title and the parameter of user's input.Described first parsing module 20 is arranged on user's space, for resolving described kernel function title and parameter, obtaining address and the type of function and parameter, and setting up parameter list.Described insmod 30 for described parameter list for kernel module parameter, add kernel module in systems in which.Described second parsing module 40 is arranged on kernel spacing, for resolving described parameter list, obtains respective function address and parameter value.Described calling module 50 is for calling described function according to described function address and parameter value.
Adopt kernel function call device 100 of the present invention, Debugging message can be worked as when not exporting to user's space, as long as kernel provides debugging interface function, namely this function can be called from user's space, then perform this function at kernel spacing and derive Debugging message, convenient and swift, and highly versatile.
Please consult Fig. 4 further, the present invention also provides a kind of operating system, and it comprises described user's space and kernel spacing, and described user's space at least comprises above-mentioned name acquiring module 10, first parsing module 20 and insmods 30.Described kernel spacing at least comprises the second above-mentioned parsing module 40 and calling module 50.In addition, described user's space also can comprise a removing module 60, at the end of kernel function call, deletes described kernel module at user's space.
It should be noted that, by the description of above embodiment, those skilled in the art can be well understood to the mode that the present invention can add required hardware platform by software and realize, and can certainly all be implemented by hardware.Based on such understanding, what technical scheme of the present invention contributed to background technology can embody with the form of software product in whole or in part, described computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the present invention or embodiment.
The above disclosed preferred embodiment be only in the embodiment of the present invention, certainly can not limit the interest field of the present invention, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained with this.
Claims (10)
1. a kernel function call method, is characterized in that, comprises step:
Obtain kernel function title and the parameter of user's input;
Resolve described kernel function title and parameter at user's space, obtain address and the type of function and parameter, and set up parameter list;
With described parameter list for kernel module parameter, the instruction that insmods is used to add kernel module in systems in which;
Described parameter list is resolved, to obtain respective function address and parameter value at kernel spacing; And
Described function is called according to described function address and parameter value.
2. kernel function call method as claimed in claim 1, comprises step further:
At the end of kernel function call, delete described kernel module at user's space.
3. kernel function call method as claimed in claim 1, it is characterized in that, described kernel function call method is applied to (SuSE) Linux OS, the function name of described user input or parameter at least follow following syntax format one of them: function name or parameter name [:] [kernel module title], with 32 sexadecimal numbers [:] of 0x beginning, decimal integer [:], wherein, character " [] " part represents selective sections, character ": " represents gets address of variable as parameter, part after character " " is kernel module title corresponding to symbol source.
4. kernel function call method as claimed in claim 1, it is characterized in that, described parameter list comprises multiple two tuples, and each two tuples comprise type and the address of each function or parameter, and wherein said type and address all represent by 32 signless integers.
5. kernel function call method as claimed in claim 4, is characterized in that, described acquisition function and the address of parameter and the step of type comprise:
Obtain functional symbol or address corresponding to pa-rameter symbols; And
Obtain the address value in two tuples and obtain 32 signless integer numerical value of sensing core position, address in two tuples, to determine type.
6. kernel function call method as claimed in claim 1, it is characterized in that, the parameter list generated passes to described kernel module as array parameter, and the element of described array parameter is 32 signless integers.
7. kernel function call method as claimed in claim 6, it is characterized in that, the described parameter list of described parsing comprises with the step obtaining respective function address and parameter value:
From transmitted array parameter, separate out type and respective function or argument address with the formal solution of two tuples of containing type and address;
Function address and parameter values is obtained successively according to described type.
8. a kernel function call device, is characterized in that, at least comprises:
Name acquiring module, for obtaining kernel function title and the parameter of user's input;
First parsing module, is arranged on user's space, for resolving described kernel function title and parameter, obtaining address and the type of function and parameter, and setting up parameter list;
Insmod, for described parameter list for kernel module parameter, add kernel module in systems in which;
Second parsing module, is arranged on kernel spacing, for resolving described parameter list, obtains respective function address and parameter value; And
Calling module, for calling described function according to described function address and parameter value.
9. an operating system, comprises user's space and kernel spacing, it is characterized in that, described user's space at least comprises:
Name acquiring module, for obtaining kernel function title and the parameter of user's input;
First parsing module, for resolving described kernel function title and parameter, obtaining address and the type of function and parameter, and setting up parameter list; And
Insmod, for described parameter list for kernel module parameter, add kernel module in systems in which; And
Described kernel spacing at least comprises:
Second parsing module, for resolving described parameter list, obtains respective function address and parameter value; And
Calling module, for calling described function according to described function address and parameter value.
10. operating system as claimed in claim 9, it is characterized in that, described user's space comprises removing module further, at the end of kernel function call, deletes described kernel module at user's space.
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| WO2019057155A1 (en) * | 2017-09-21 | 2019-03-28 | 华为技术有限公司 | Method and device for dynamically managing kernel node |
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