From: Chris Friesen <cfriesen@nortelnetworks.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev list <linuxppc-dev@lists.linuxppc.org>
Subject: Re: help with asm code?
Date: Wed, 21 Apr 2004 10:00:34 -0400 [thread overview]
Message-ID: <40867E82.3010202@nortelnetworks.com> (raw)
In-Reply-To: <1082506664.2077.9.camel@gaston>
Benjamin Herrenschmidt wrote:
>> lis r5,hrt_ak_offsets@ha
>> addi r5,r5,hrt_ak_offsets@l
>> lbzx r6,r6,r5
>> add r10,r4,r6
>>
>>
>>I'm having a small problem, in that when I run this code it hangs my
>>kernel. Any ideas what's wrong? The values in r6 and r5 seem to match
>>what I expect, but when I do the lbzx it dies.
>
>
> I don't know for sure, maybe you MMU context is wrong at the time ?
The code is being called from fast_exception_return, syscall_exit_cont,
and restore_user.
> How do you know it dies there and not elsewhere ?
If I remove the lbzx/add lines, everything works fine. With the lbzx
line it dies, even if r10 is overwritten right away.
Chris
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2004-04-21 14:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-20 15:56 asm code Chris Friesen
2004-04-21 0:17 ` help with asm code? Benjamin Herrenschmidt
2004-04-21 14:00 ` Chris Friesen [this message]
2004-04-21 23:02 ` Benjamin Herrenschmidt
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