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Date:      05 Oct 2001 12:04:21 +0200
From:      Dag-Erling Smorgrav <des@ofug.org>
To:        Bruce Evans <bde@zeta.org.au>
Cc:        Peter Wemm <peter@wemm.org>, <arch@FreeBSD.ORG>
Subject:   Re: Removing ptrace(2)'s dependency on procfs(5)
Message-ID:  <xzpg08ybdy2.fsf@flood.ping.uio.no>
In-Reply-To: <20011005141014.W12962-100000@delplex.bde.org>
References:  <20011005141014.W12962-100000@delplex.bde.org>

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Bruce Evans <bde@zeta.org.au> writes:
> On 5 Oct 2001, Dag-Erling Smorgrav wrote:
> > procfs_rwmem() was originally derived from code which still resides
> > (#if 0'd out) in sys_process.c.  That's why I felt it was the most
> > logical place to move it to.
> This may have happened before the dawn of history, but 4.4BSD-Lite has
> a full procfs_rwmem() and only stubs in sys_process.c, so FreeBSD
> certainly didn't derive procfs_rwmem() from sys_process.c.  History
> shows that sys_process.c once used pread(), but peter changed it to
> use procfs in rev.1.21.  It's more likely that pread() was derived
> from procfs_rwmem() than vice versa.

The comments in the code indicate that procfs_rwmem() was derived by
merging pread() and pwrite(), not the other way around - and there are
a lot of similarities between them.

> This is not quite right in your reorganization.  The functions are needed
> by both procfs and ptrace, so they shouldn't be in procfs_machdep.c or
> have names beginning with procfs.

I didn't pick that location or those names.  I'll move and rename
these functions later, when I don't have sixty or seventy uncommitted
patches in two different and partially conflicting source trees.

DES
-- 
Dag-Erling Smorgrav - des@ofug.org

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