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From: Richard Henderson <richard.henderson@linaro.org>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-arm <qemu-arm@nongnu.org>, QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [PATCH v2 8/8] tests/tcg: Add arm and aarch64 pc alignment tests
Date: Fri, 27 Aug 2021 21:04:24 -0700	[thread overview]
Message-ID: <d7fe267b-154b-8d96-1b27-1c696b1a030d@linaro.org> (raw)
In-Reply-To: <CAFEAcA8Vf-mF4xpMkv+Xc6Cc-u1fW5yW1-fHwVSFqZ6EKNdmPA@mail.gmail.com>

On 8/26/21 6:54 AM, Peter Maydell wrote:
> On Sat, 21 Aug 2021 at 21:09, Richard Henderson
> <richard.henderson@linaro.org> wrote:
> 
>> +    /*
>> +     * From v8, it is CONSTRAINED UNPREDICTABLE whether BXWritePC aligns
>> +     * the address or not.  If so, we can legitimately fall through.
>> +     */
>> +    return EXIT_SUCCESS;
>> +}
> 
> Can we get the test harness to run the test on a cortex-a9 guest CPU
> so we can avoid the UNPREDICTABLE and can always check the signal
> happened ? The test is a bit weak if it doesn't actually test that
> we take an exception...

Well, it'll always raise an exception under qemu.

I wrote it this way so that it would also always succeed when run on real hardware.  Even 
then, I have no specific knowledge of a cpu that does not raise an exception, but I only 
tested cortex-a57.


r~


  reply	other threads:[~2021-08-28  4:05 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-21 19:59 [PATCH v2 0/8] target/arm: Fix insn exception priorities Richard Henderson
2021-08-21 19:59 ` [PATCH v2 1/8] target/arm: Take an exception if PSTATE.IL is set Richard Henderson
2021-08-21 19:59 ` [PATCH v2 2/8] target/arm: Merge disas_a64_insn into aarch64_tr_translate_insn Richard Henderson
2021-08-21 19:59 ` [PATCH v2 3/8] linux-user/aarch64: Handle EC_PCALIGNMENT Richard Henderson
2021-08-26 13:27   ` Peter Maydell
2021-08-21 19:59 ` [PATCH v2 4/8] linux-user/arm: Report SIGBUS and SIGSEGV correctly Richard Henderson
2021-08-26 13:31   ` Peter Maydell
2021-09-08  9:19     ` Richard Henderson
2021-09-19 22:23     ` Richard Henderson
2021-08-21 19:59 ` [PATCH v2 5/8] target/arm: Take an exception if PC is misaligned Richard Henderson
2021-08-26 13:45   ` Peter Maydell
2021-09-20  1:29     ` Richard Henderson
2021-09-20  8:08       ` Peter Maydell
2021-09-20 13:29         ` Richard Henderson
2021-08-21 19:59 ` [PATCH v2 6/8] target/arm: Assert thumb pc is aligned Richard Henderson
2021-08-21 20:46   ` Philippe Mathieu-Daudé
2021-09-19 22:34     ` Richard Henderson
2021-08-26 13:46   ` Peter Maydell
2021-08-21 19:59 ` [PATCH v2 7/8] target/arm: Suppress bp for exceptions with more priority Richard Henderson
2021-08-21 19:59 ` [PATCH v2 8/8] tests/tcg: Add arm and aarch64 pc alignment tests Richard Henderson
2021-08-26 13:54   ` Peter Maydell
2021-08-28  4:04     ` Richard Henderson [this message]
2021-09-13 13:29 ` [PATCH v2 0/8] target/arm: Fix insn exception priorities Peter Maydell

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