lkml.org 
[lkml]   [1999]   [Oct]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: access_ok inside kernelspace
On Tue, 19 Oct 1999, Horst von Brand wrote:
> I don't understand this. A module is linked into the running kernel, and
> has access to all of it AFAIU, so I can't see any need for this contortion
> for modules. Maybe I'm just plain blind today...
The kernel only has access to symbols which base kernel chose to export
(kernel/ksyms.c and arch/i386/kernel/i386_ksyms.c). However, you are not
blind and neither was I - just slightly short-sighted :)

I forgot about the well-known fact that sys_call_table[] is exported so
modules should call sys_XXX() functions indirectly via sys_call_table[].
I even wrote a little module ages ago that is based solely on this simple
fact.

Regards,
Tigran.



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:54    [W:0.076 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site