Hi Sasin > first ... i try to change some kernel code for support add system > call dynamically by add EXPORT_SYMBOL(sys_call_table) in file ksyms.c Sasin, I agree with Gaurav. I also think there is a basic flaw here, that is not updating NR_syscalls. Try to check it here: include/asm-i386/unistd.h. As you can see, that is a constant so you need to change that before doing kernel rebuild. Another thing is, please take a look on arch/i386/kernel/syscall_table.S. In my humble opinion, even if sys_call_table is referenced with array index, that doesn't mean it can be extended the way you had done (by simply adding sys_call_table[259]="..." and so on). It is fixed size length series of data and I also think right after the last entry of syscall table, it is straightly followed by another data or code...so I am afraid, you're actually overwriting another code/data. That's all I know so far, I hope it is helpful for you PS: Try to check these two interesting URLs http://www.linuxgazette.com/issue90/weber.html http://www.ussg.iu.edu/hypermail/linux/kernel/0306.0/0500.html regards Mulyadi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
