Re: mmap inside kernel memory.

[Jerome de Vivie <jerome.devivie@free.fr>]

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 (naïvly) 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.

-- 
Jérôme de Vivie