Re: mmap inside kernel memory.

From: Jerome de Vivie (jerome.devivie@free.fr)
Date: Sat Feb 08 2003 - 20:50:55 EST


Rik van Riel wrote:
>
> On Sun, 9 Feb 2003, Jerome de Vivie wrote:
>
> > "mmap" seems to be design for mapping file or device inside a process
> > memory. Is it possible to map a file into the kernel virtual memory ?
>
> In theory yes (using vmalloc space), but you really don't want to.

Yes, it's very tricky ! I have (na´vly) try this:

vaddr=vmalloc(len);
do_mmap(file ,kvaddr ,len ,PROT_READ|PROT_WRITE ,MAP_FIXED|MAP_PRIVATE
,0);

Here, do_mmap check if the addresse match inside current process and
return me -ENOMEM. Are there others functions which i could use to
associate this file and a vmalloc'ed space ?

j.

-- 
JÚr˘me de Vivie
-
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/



This archive was generated by hypermail 2b29 : Sat Feb 15 2003 - 22:00:20 EST