From: Ulrich Hecht <uli@suse.de>
To: Stuart Brady <sdbrady@ntlworld.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RFC PATCH] s390x-linux-user
Date: Fri, 3 Jul 2009 17:11:49 +0200 [thread overview]
Message-ID: <200907031711.49985.uli@suse.de> (raw)
In-Reply-To: <20090626190714.GA464@miranda.arrow>
On Friday 26 June 2009, Stuart Brady wrote:
> Also, if S/390 has separate read/execute page bits, would access to
> the memory location in question still count as 'execution'?
I think so:
"The fetching of the target instruction is considered to be an
instruction fetch for purposes of program-event recording and for
purposes of reporting access exceptions."
BTW, I got a detail wrong in the description of EXECUTE (not in the
code): The register used for the OR operation is encoded in the EXECUTE
instruction, with 0 meaning "don't OR". So it can actually be any
general-purpose register _except_ R0. See
http://publibfp.boulder.ibm.com/cgi-bin/bookmgr/download/A2278324.pdf
page 7-126.
CU
Uli
--
SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)
prev parent reply other threads:[~2009-07-03 15:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-26 16:49 [Qemu-devel] [RFC PATCH] s390x-linux-user Ulrich Hecht
2009-06-26 17:17 ` Blue Swirl
2009-06-26 17:40 ` Paul Brook
2009-06-26 17:46 ` Blue Swirl
2009-06-26 17:59 ` Paul Brook
2009-06-26 18:18 ` Paul Brook
2009-06-26 18:22 ` Blue Swirl
2009-06-26 18:39 ` Paul Brook
2009-06-26 19:07 ` Stuart Brady
2009-06-26 19:24 ` Paul Brook
2009-07-03 15:11 ` Ulrich Hecht [this message]
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