On Thu, Dec 11, 2003 at 03:10:26PM -0500, bijoyjth wrote:
|Hello Daniele ... really kool of u to offer the course of ur module .. cud u
|sent it to me?
i can post to kernelnewbies ML ... and i can ask to add the source
code to the kernelnewbies website
it could be interesting since the following are shown:
- how to create a kernel_thread
- how to issue sys_call from kernel space (even if it's a better idea)
- last but not least: how to send UDP packets from kernel space.
|... I have a doubt ... wat is this set_fs and get_fs ... wat do
|they do ??? wat i understood is this .. to access userspace data ... we have
|to chande the ds register to the processes ds ... and when coming back to our
|module we need to set the ds to KERNEL_DS bczo our module runs in kernel space
|... am i rit??
Yes you're absolutly right, since when you call sock_sendmsg
a "copy from user space" operation happens.
--
Daniele.
"I could have made money this way, and perhaps amused myself writing code.
But I knew that at the end of my career, I would look back on years of
building walls to divide people, and feel I had spent my life making the
world a worse place."
Richard Stallman
--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive: http://mail.nl.linux.org/kernelnewbies/
FAQ: http://kernelnewbies.org/faq/
