From: Peter Maydell <peter.maydell@linaro.org>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: qemu-arm <qemu-arm@nongnu.org>, QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH v3 2/4] target/arm: handle A-profile semihosting at translate time
Date: Fri, 6 Sep 2019 14:33:41 +0100 [thread overview]
Message-ID: <CAFEAcA-r9D71LoLowae8vm=sp1oojUBhppm0t97sUck4s5tp1Q@mail.gmail.com> (raw)
In-Reply-To: <87a7bhzhsn.fsf@linaro.org>
On Fri, 6 Sep 2019 at 14:16, Alex Bennée <alex.bennee@linaro.org> wrote:
>
>
> Peter Maydell <peter.maydell@linaro.org> writes:
>
> > On Fri, 6 Sep 2019 at 13:47, Alex Bennée <alex.bennee@linaro.org> wrote:
>
> >
> > Doesn't this accidentally enable semihosting via SVC for
> > M-profile ?
>
> We must have done that before then.
No, we didn't do it before, because we were handling it in
arm_cpu_do_interrupt(), which is A/R-profile only. The
M-profile code goes via arm_v7m_cpu_do_interrupt() which doesn't
check for semihosting when it sees an EXCP_SWI.
> Just gate it with && !arm_dc_feature(s, ARM_FEATURE_M) then?
Yes, I think that's the right fix.
thanks
-- PMM
next prev parent reply other threads:[~2019-09-06 13:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-06 12:47 [Qemu-devel] [PATCH v3 0/4] semihosting fixes Alex Bennée
2019-09-06 12:47 ` [Qemu-devel] [PATCH v3 1/4] target/arm: handle M-profile semihosting at translate time Alex Bennée
2019-09-06 15:03 ` Richard Henderson
2019-09-06 12:47 ` [Qemu-devel] [PATCH v3 2/4] target/arm: handle A-profile " Alex Bennée
2019-09-06 12:54 ` Peter Maydell
2019-09-06 13:16 ` Alex Bennée
2019-09-06 13:33 ` Peter Maydell [this message]
2019-09-06 15:05 ` Richard Henderson
2019-09-06 12:47 ` [Qemu-devel] [PATCH v3 3/4] target/arm: remove run time semihosting checks Alex Bennée
2019-09-06 12:47 ` [Qemu-devel] [PATCH v3 4/4] atomic_template: fix indentation in GEN_ATOMIC_HELPER Alex Bennée
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