Re: Quick Syscall question

[Neil Horman <nhorman@redhat.com>]

Randy.Dunlap wrote:

>On Sun, 5 Sep 2004 13:17:42 -0500 Eric Bambach wrote:
>
>| Hello,
>| 
>| 	This may seem like a silly question, however we were all beginning 
>| programmers once ;)
>| 
>| 	I want to do some manipulating of network interfaces and routing and such. I 
>| am reading through some of the linux net sources but am confused on what are 
>| internal, kernel-only functions and what are externally visable syscalls. How 
>| can I tell from the source what is user-space visable that I can hook into 
>| and what is intternel stuff? Should I just be looking at headers or do I have 
>| to delve into the .c sources? I can do either, I just need a pointer on where 
>| to start and what I should be looking for.
>
>Most syscalls are listed in include/linux/syscalls.h.
>Also look in include/asm-*/unistd.h.
>Also in entry.S in arch/*/ (various sub-directory levels).
>
>--
>~Randy
>-
>To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>Please read the FAQ at  http://www.tux.org/lkml/
>  
>
Also, if you're looking into writing kernel modules, anything listed in 
arch/*ksyms.c as a symbol inside an EXPORT_SYMBOL block is accessible, 
although that may not mean its available from user space.
Neil

-- 
/***************************************************
 *Neil Horman
 *Software Engineer
 *Red Hat, Inc.
 *nhorman@redhat.com
 *gpg keyid: 1024D / 0x92A74FA1
 *http://pgp.mit.edu
 ***************************************************/