All of lore.kernel.org
 help / color / mirror / Atom feed
From: Alexander Graf <agraf@suse.de>
To: Anton Blanchard <anton@samba.org>
Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] target-ppc: Fix SRR0 when taking unaligned exceptions
Date: Wed, 26 Aug 2015 11:44:30 +0200	[thread overview]
Message-ID: <55DD8A7E.5080708@suse.de> (raw)
In-Reply-To: <20150702144406.40bce749@kryten>



On 02.07.15 06:44, Anton Blanchard wrote:
> We are setting SRR0 to the instruction before the one causing the
> unaligned exception. A quick testcase:
> 
> . = 0x100
> .globl _start
> _start:
> 	/* Cause a 0x600 */
> 	li	3,0x1
> 	stwcx.	3,0,3
> 1:	b	1b
> 
> . = 0x600
> 1:	b	1b
> 
> Built into something we can load as a BIOS image:
> 
> gcc -mbig -c test.S
> ld -EB -Ttext 0x0 -o test test.o
> objcopy -O binary test test.bin
> 
> Run with:
> 
> qemu-system-ppc64 -nographic -bios test.bin
> 
> Shows an incorrect SRR0 (points at the li):
> 
> SRR0 0000000000000100
> 
> With the patch we get the correct SRR0:
> 
> SRR0 0000000000000104
> 
> Signed-off-by: Anton Blanchard <anton@samba.org>

Thanks, applied to ppc-next.


Alex

  reply	other threads:[~2015-08-26  9:44 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-02  4:44 [Qemu-devel] target-ppc: Fix SRR0 when taking unaligned exceptions Anton Blanchard
2015-08-26  9:44 ` Alexander Graf [this message]
2015-09-08 22:21 ` [Qemu-devel] [Qemu-ppc] " Benjamin Herrenschmidt

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=55DD8A7E.5080708@suse.de \
    --to=agraf@suse.de \
    --cc=anton@samba.org \
    --cc=qemu-devel@nongnu.org \
    --cc=qemu-ppc@nongnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.