The Ori Pomerantz's LKM Programming Guide is great document, but little old. A couple of question for adding new system call I would like to ask: 1. After adding an entry in include/asm-i386/unistd.h and #insmod my_newsyscall.o how the userland application can find the new system call, my_syscall(), rather than show linking error: undefined reference my_syscall(). Do I have to recompile the kernel? I am missing something here for procedure of adding system call. 2. Is there a newer document which explains procedure of system call as I couldn't find it in FAQ. Thanks for the help, -Hong - Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
