From: "Philippe Mathieu-Daudé" <philmd@linaro.org>
To: Kohei Tokunaga <ktokunaga.mail@gmail.com>, qemu-devel@nongnu.org
Cc: "Alex Bennée" <alex.bennee@linaro.org>,
"Thomas Huth" <thuth@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>,
"Daniel P . Berrangé" <berrange@redhat.com>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"Pierrick Bouvier" <pierrick.bouvier@linaro.org>
Subject: Re: [PATCH v2 2/4] configure: Enable to propagate -sMEMORY64 flag to Emscripten
Date: Wed, 6 Aug 2025 18:21:30 +0200 [thread overview]
Message-ID: <0215c941-26b6-44b6-a05c-c1cc2b0551a8@linaro.org> (raw)
In-Reply-To: <112b6882f9bd370deffb8637116fc44e043c250f.1754494089.git.ktokunaga.mail@gmail.com>
On 6/8/25 17:49, Kohei Tokunaga wrote:
> Currently there are some engines that don't support wasm64 (e.g. unsupported
> on Safari[1]). To mitigate this issue, the configure script allows the user
> to use Emscripten's compatibility feature, "-sMEMORY64=2" flag[2].
>
> Emscripten's "-sMEMORY64=2" flag still enables 64bit pointers in C code. But
> this flag lowers the output binary into wasm32, with limiting the maximum
> memory size to 4GB. So QEMU can run on wasm32 engines.
>
> [1] https://webassembly.org/features/
> [2] https://emscripten.org/docs/tools_reference/settings_reference.html#memory64
>
> Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com>
> ---
> configure | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
next prev parent reply other threads:[~2025-08-06 17:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-06 15:49 [PATCH v2 0/4] wasm: Enable 64bit guests on TCI using wasm64 Kohei Tokunaga
2025-08-06 15:49 ` [PATCH v2 1/4] meson: Add wasm64 support to the --cpu flag Kohei Tokunaga
2025-08-06 15:49 ` [PATCH v2 2/4] configure: Enable to propagate -sMEMORY64 flag to Emscripten Kohei Tokunaga
2025-08-06 16:21 ` Philippe Mathieu-Daudé [this message]
2025-08-06 18:00 ` Pierrick Bouvier
2025-08-06 15:49 ` [PATCH v2 3/4] dockerfiles: Add support for wasm64 to the wasm Dockerfile Kohei Tokunaga
2025-08-06 15:49 ` [PATCH v2 4/4] .gitlab-ci.d: Add build tests for wasm64 Kohei Tokunaga
2025-08-06 16:27 ` Philippe Mathieu-Daudé
2025-08-07 1:56 ` Kohei Tokunaga
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