From: Max Filippov <jcmvbkbc@gmail.com>
To: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
Thomas Huth <thuth@redhat.com>,
David Hildenbrand <david@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
qemu-devel <qemu-devel@nongnu.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
qemu-s390x@nongnu.org, qemu-arm <qemu-arm@nongnu.org>,
Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [PATCH v4 3/4] target/xtensa: Make sure that tb->size != 0
Date: Thu, 15 Apr 2021 13:14:39 -0700 [thread overview]
Message-ID: <CAMo8BfKxvt8kGD5m7sn6tVtb=BvGM32yU6CPAhQTjfN-SwpemA@mail.gmail.com> (raw)
In-Reply-To: <20210415130305.28640-4-iii@linux.ibm.com>
On Thu, Apr 15, 2021 at 6:03 AM Ilya Leoshkevich <iii@linux.ibm.com> wrote:
>
> tb_gen_code() assumes that tb->size must never be zero, otherwise it
> may produce spurious exceptions. For xtensa this may happen when
> decoding an unknown instruction, when handling a write into the
> CCOUNT or CCOMPARE special register and when single-stepping the first
> instruction of an exception handler.
>
> Fix by pretending that the size of the respective translation block is
> 1 in all these cases.
>
> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
> ---
> target/xtensa/translate.c | 3 +++
> 1 file changed, 3 insertions(+)
Tested-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
--
Thanks.
-- Max
next prev parent reply other threads:[~2021-04-15 20:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-15 13:03 [PATCH v4 0/4] accel/tcg: Make sure that tb->size != 0 after translation Ilya Leoshkevich
2021-04-15 13:03 ` [PATCH v4 1/4] target/s390x: Fix translation exception on illegal instruction Ilya Leoshkevich
2021-04-15 13:03 ` [PATCH v4 2/4] target/arm: Make sure that commpage's tb->size != 0 Ilya Leoshkevich
2021-04-16 14:10 ` Peter Maydell
2021-04-16 15:38 ` Ilya Leoshkevich
2021-04-15 13:03 ` [PATCH v4 3/4] target/xtensa: Make sure that " Ilya Leoshkevich
2021-04-15 20:14 ` Max Filippov [this message]
2021-04-15 13:03 ` [PATCH v4 4/4] accel/tcg: Assert that tb->size != 0 after translation Ilya Leoshkevich
2021-04-15 15:39 ` [PATCH v4 0/4] accel/tcg: Make sure " Cornelia Huck
2021-04-16 11:53 ` Ilya Leoshkevich
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