Hi all, i'm trying to create a simple system call in a kernel 2.4 distribution. I read guide/articles like this
http://irfanhabib.wordpress.com/2006/10/01/adding-a-system-call-linux-24x/ All the articles say the same things, but the implementation of my new system call doesn't work. I create a new entry in arch/i386/kernel/entry.S I create a new entry in include/asm/unistd.h I create a new function with the asmlinkage prefix in a source file already defined (in ipc/sem.c for example) When i create my user program, it doesn't work. Firstly when i try to compile i receive a problem like this : undefined reference to 'errno' Then I include errno.h (also if i don't understand this step) and the compilation works, but the syscall neverworks, because the call always return -1. Any help? Any tutorial FOR DUMMY MAN that someone already used? Cheers Federico - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
