You have made exactly the same question about the "execve" sytem call,
some weeks ago.  8)

System calls are not linked magically using their names, but we should
have a system call interface that makes libc notify the kernel that some
syscall should be called. Take a look at arch/i86/kernel/syscall.dat,
mkentry.sh and the entry.c (it is generated by mkentry.sh), if you want
to know how it works.

If you are looking for the system calls' implementations, look at
sys_execve, sys_open, sys_fork, and others sys_* functions.

On Mon, Jul 19, 2004 at 07:19:51PM -0700, Tommy McCabe wrote:
> Although the open( call seems to be used everywhere
> (in around 70 source code files), it isn't defined
> anywhere. How can ELKS get past booting if a call
> isn't defined?
> 

-- 
Eduardo