On 7/1/06, pankaj chauhan <chauhan_ait@xxxxxxxxxxx> wrote:
hi all, i have a module say my_mod.ko, which is composed to two two binaries say my_mod1.o and my_mod2.o. I am trying to insmod this module on 2.6.11, which is compiled by gcc 3.4.3, If i compile my_mod1 and my_mod2 with gcc3.4.3 and my_mod.ko gets insmoded with no problems. But if my_mod2.o is compiled with gcc 2.95 then my_mod.ko does not get insmoded and it says "Invalid module format: unknown error 8". I understand that the kernel and the module should be compiled with same gcc version to work properly (for which i do'nt know the reason, if somebody please tell me the reason that will be great). But what i do'nt understand is that what is the difference when i compile my_mod2 with gcc 3.4 or 2.95, and how it is detected that my_mod2.o is compiled with a different gcc version, as far as i understand there is no information about the compiler in ELF file which tells you that which compiler version was used to for compilation (please correct me if i am wrong).
There is a string called version magic which stores info on kernel version, compiler version etc. The kernel compares the module's vermagic with that of kernls. regards Manish Regmi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
