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DragonFly kernel List (threaded) for 2003-11
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Re: trap.c: Why do we save tf_edx in sysmsg_fds[1]?

From: David Leimbach <leimy2k@xxxxxxx>
Date: Mon, 10 Nov 2003 13:33:28 -0600

On Nov 10, 2003, at 12:28 PM, Matthew Dillon wrote:

:On Mon, Nov 10, 2003 at 02:09:44AM -0800, Matthew Dillon wrote:
:> Now, practically speaking matter edx is not a saved-used register so it
:> shouldn't matter if it gets munged on return, so theoretically we can
:> get rid of the edx assigned. But that could break some obscure
:> bit of compatibility so I'd rather leave things as is.
:I thought it would be really cool to pull the zero %edx on exec cruft
:into trap.c. I guess one hack that we know works is better than
:a different hack that causes gross uncertainty.
: David P. Reese, Jr. daver@xxxxxxxxxxxx
: http://www.gomerbud.com/daver/

I'll document the edx assignment in trap.c so nobody else falls into the
same trap. heh. get it? falls into the same trap? Sigh, my humor is
getting horrible these days.

Yes.... sometimes it's just not "punny".


					Matthew Dillon

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