kern/155903: FreeBSD32 emulation patch to support i386 X11 Server

[Mark Linimon]

The following reply was made to PR kern/155903; it has been noted by GNATS.

From: Mark Linimon <linimon at lonesome.com>
To: bug-followup at FreeBSD.org
Cc:  
Subject: Re: kern/155903: FreeBSD32 emulation patch to support i386 X11
 Server
Date: Sat, 9 Apr 2011 14:27:22 -0500

 ----- Forwarded message from John Wehle <john at feith.com> -----
 
 Date: Thu, 24 Mar 2011 17:26:08 -0400 (EDT)
 From: John Wehle <john at feith.com>
 To: kostikbel at gmail.com
 Cc: amd64 at freebsd.org
 Subject: Re: amd64/155903: FreeBSD32 emulation patch to support i386 X11
 	Server
 
 > First, please split the patch into smaller, logically self-contained
 > parts. E.g. the change to handle fdrop() in one place should be committed
 > separately.
 
 Will do.  Okay to just submit the series of patches under amd64/155903
 or do you want them file under separate bug reports?
 
 > The last commit is the most controversial, in fact. I understand the
 > reason to get the user memory for calling into pciconf ioctls, but this
 > is somewhat ugly. Ideally, the pci_ioctl() would be changed into wrapper
 > and core code, and two wrappers produced, one for the native call path,
 > other for compat32.
 
 I don't necessarily disagree, however that's more work than I'm planning on
 at the moment.
 
 > BTW, would you do the shims for other pciconf ioctls, while there ?
 
 I would have if necesary (since I was there).  However at a quick glance
 of pciio.h it didn't appear to me to be necessary.  Also I do suspect
 that the i386 X11 Server is making successfuly use of some of the other
 calls.
 
 Keep in mind that the freebsd32 layer has generic handling for those
 ioctl calls that don't require anything special.  I believe PCIOCREAD,
 PCIOCWRITE, and friends fall into that category since it appears the
 structures don't change size or alignment between i386 and amd64
 (mind you this was based just on a quick glance at the header).
 
 -- John
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 ----- End forwarded message -----