Date: Mon, 1 Dec 2008 02:38:51 +0100 From: Alexej Sokolov <bsd.quest@googlemail.com> To: freebsd-hackers@freebsd.org Subject: remapping kernel buffer in VMS of user process Message-ID: <20081201013851.GA20549@debian.samsung.router>
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Hello,
I would like to remap some buffers allocated in kernel space to memory
space of certain process.
For Example, in attach function of driver:
static int
driver_attach {
...
struct vmspace *vms = some_thread->td_proc->p_vmspace;
bufp = malloc (PAGE_SIZE, M_DEVBUF, M_NOWAIT);
/* How to create in vms of some_thread->td_proc remapping of buffer
pointed (in kernel) by bufp ?
some_thread should access the buffer using its virtual user
addresses and driver should access the same data using its kernel
virtual addresses (bufp)
*/
...
}
--
Alexej Sokolov <bsd.quest@googlemail.com>
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