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Date: Thu, 21 Apr 2011 17:44:20 +0200
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From: Laurent Desnogues <laurent.desnogues@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Subject: Re: [Qemu-devel] tcg/tcg.c:1892: tcg fatal error
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To: Artyom Tarasenko <atar4qemu@gmail.com>
Cc: Blue Swirl <blauwirbel@gmail.com>, peter.maydell@linaro.org, qemu-devel <qemu-devel@nongnu.org>, Aurelien Jarno <aurelien@aurel32.net>

On Thu, Apr 21, 2011 at 4:57 PM, Artyom Tarasenko <atar4qemu@gmail.com> wrote:
> On Tue, Apr 12, 2011 at 4:14 AM, Igor Kovalenko
> <igor.v.kovalenko@gmail.com> wrote:
>>>> Do you have public test case?
>>>> It is possible to code this delay slot write test but real issue may
>>>> be corruption elsewhere.
>
> The test case is trivial: it's just the two instructions, branch and wrpr.
>
>> In theory there could be multiple issues including compiler induced ones.
>> I'd prefer to see some kind of reproducible testcase.
>
> Ok, attached a 40 byte long test (the first 32 bytes are not used and
> needed only because the bios entry point is 0x20).
>
> $ git pull && make && sparc64-softmmu/qemu-system-sparc64 -bios
> test-wrpr.bin -nographic
> Already up-to-date.
> make[1]: Nothing to be done for `all'.
> /mnt/terra/projects/vanilla/qemu/tcg/tcg.c:1892: tcg fatal error
> Aborted

The problem seems to be that wrpr is using a non-local
TCG tmp (cpu_tmp0).


Laurent