Re: allocate memory in userspace

[Brian Gerst]

Timo Benk wrote:
> Hi,
> 
> I am a kernel newbie and i am writing a module. I 
> need to allocate some memory in userspace because
> i want to access syscalls like open(), lstat() etc.
> I need to call these methods in the kernel, and in
> my special case there is no other way, but i 
> do not want to reimplement all the syscalls.

What are you trying to do with this module?  If you are needing to use 
syscalls like open(), you are probably trying to do something that is 
forbidden in kernel space.  For example, trying to read a configuration 
file.

Recommended reading:
http://www.linux.org.uk/~ajh/ols2002_proceedings.pdf.gz
The chapter named "How NOT to write kernel drivers", especially sections 
7 and 8.

--
				Brian Gerst