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From: Stephen Cameron <smcameron@yahoo.com>
To: linux-kernel@vger.kernel.org
Subject: x86_64 and ioctls from 32 bit userland
Date: Fri, 21 May 2004 12:42:24 -0700 (PDT)	[thread overview]
Message-ID: <20040521194224.63535.qmail@web12303.mail.yahoo.com> (raw)

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Hi, a question about x86_64 and ioctls coming in from 32-bit
userland.

I found this document describing 32-bit ioctls on 64 bit archs,
http://shorterlink.com/?47B2OV
but, it is from July of 2002, so I'm not sure it's up to date.
Should I look somewhere else?

Also, if my userland process passes in an ioctl data structure
and that data structure in turn contains ontains a 32 bit pointer
to another data buffer within that process' address space
the kernel needs to copy in/oot, how can that be handled?
Can it be handled?

Thanks,

-- steve



	
		
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             reply	other threads:[~2004-05-21 22:45 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-05-21 19:42 Stephen Cameron [this message]
2004-05-21 22:58 ` Richard B. Johnson
2004-05-24 16:45   ` Stephen Cameron

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