>-Original Message-
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf Of Matthew Dharm
>Sent: Monday, April 04, 2005 12:20 PM
>To: Richard B. Johnson
>Cc: Kernel Developer List
>Subject: Re: mmap() and ioctl()
>
[snip]
>That's an inter
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Matthew Dharm
Sent: Monday, April 04, 2005 12:20 PM
To: Richard B. Johnson
Cc: Kernel Developer List
Subject: Re: mmap() and ioctl()
[snip]
That's an interesting concept, and one I'm not familiar
ther process or
> an interrupt. In other words, you can't store it somewhere and
> access it later in some other context.
Right, I've got that part. The plan has been to mmap(), ioctl(), and
inside the ioctl do a copy_from_user() into a kernel-context buffer.
> >Yeah, that's an odd con
On Mon, 4 Apr 2005, Matthew Dharm wrote:
This probably is a silly question, but
Is is possible to open a file, mmap() it into memory, then pass the address
of that map via an ioctl() call to the kernel, which will copy_from_user()
that data?
Yes. A user-mode pointer, passed via ioctl() is
This probably is a silly question, but
Is is possible to open a file, mmap() it into memory, then pass the address
of that map via an ioctl() call to the kernel, which will copy_from_user()
that data?
Yeah, that's an odd concept, I know... I could always malloc() some
memory, read the file
This probably is a silly question, but
Is is possible to open a file, mmap() it into memory, then pass the address
of that map via an ioctl() call to the kernel, which will copy_from_user()
that data?
Yeah, that's an odd concept, I know... I could always malloc() some
memory, read the file
On Mon, 4 Apr 2005, Matthew Dharm wrote:
This probably is a silly question, but
Is is possible to open a file, mmap() it into memory, then pass the address
of that map via an ioctl() call to the kernel, which will copy_from_user()
that data?
Yes. A user-mode pointer, passed via ioctl() is
and
access it later in some other context.
Right, I've got that part. The plan has been to mmap(), ioctl(), and
inside the ioctl do a copy_from_user() into a kernel-context buffer.
Yeah, that's an odd concept, I know... I could always malloc() some
memory, read the file in, and then ioctl
8 matches
Mail list logo
