Hi, As the command did not display anything, that means the symbol your module is using is not exposed by either the core kernel or any base modules on which your module is based. This means that you can not use those symbols in your module. For any Module it's important to use only those kernel symbols (variables and function names) which have been exposed by core kernel or base modules. We can not use the symbols which has not been exposed by kernel. By exposing I mean we need to provide them out of the module scope in which they hav been defined. If you don't want to export any of you modules symbols (so that no other module can use it), you need to use EXPORT_NO_SYMBOLS; macro in your module. You can use it anywhere in your module. For more information refer to the 2nd chapter of "Linux Device Drivers" by Rubini. Following is the link for that. http://www.xml.com/ldd/chapter/book/ch02.html#t3 Regards, Gaurav -----Original Message----- From: murad ali [mailto:zalmay_77@hotmail.com] Sent: Friday, July 02, 2004 12:53 PM To: Dhiman, Gaurav Subject: RE: procfs.o insmod error Respected Friend So nice of u for immediate reply. I applied the command #ksyms | grep <symbol name> | more but no output get displayed. kindly help me more n this regard.Also suggest for me some other important materials inorder to be a Module Programmer. Wish u best of Luck. >From: "Dhiman, Gaurav" <Gaurav.Dhiman@ca.com> >To: "murad ali" <zalmay_77@hotmail.com> >CC: <kernelnewbies@nl.linux.org> >Subject: RE: procfs.o insmod error >Date: Thu, 1 Jul 2004 11:53:03 +0530 > > >The errors you are getting while insmode is because of the symbols used >in module, has not been exposed by core kernel or any base module. > >Run the following command and if you are not able to find the symbol in >the output of this command then the problem is that module you want to >load is using symbols which have not been exposed by either core kernel >or the base modules. > >Command is: >ksyms | grep <symbol name> | more > >Regards, >Gaurav > > >-----Original Message----- >From: kernelnewbies-bounce@nl.linux.org >[mailto:kernelnewbies-bounce@nl.linux.org] On Behalf Of murad ali >Sent: Thursday, July 01, 2004 11:28 AM >To: kernelnewbies@nl.linux.org >Subject: procfs.o insmod error > >Hi Respected Colligues > >I am LKMP Learner. I compiled The file procfs.c (in Linux kernel Module > >Programming Guide) With following Command successfully >gcc -c -o2 -isystem /lib/modules/2.4.19/include procfs.c >But when I try to Insert it with insmod command , it get the following >errors > >procfs.o: unresolved symbol proc_register >procfs.o: unresolved symbol proc_unregister > >and with lsmod no modules get appears. >soon reply will b hihly appretiated. >wish u best of Luck > >_________________________________________________________________ >STOP MORE SPAM with the new MSN 8 and get 2 months FREE* >http://join.msn.com/?page=features/junkmail > > >-- >Kernelnewbies: Help each other learn about the Linux kernel. >Archive: http://mail.nl.linux.org/kernelnewbies/ >FAQ: http://kernelnewbies.org/faq/ > > _________________________________________________________________ MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
