Wasmtime: Add example binfmt interpreter
I have a binfmt configuration setup to use wasmtime like this:
:wasm32-wasi:M::\x00asm:\xff\xff\xff\xff:/run/binfmt/wasmtime:
It might be useful to others. Some documentation or an example .conf could be provided.
matthewbauer
All 5 comments
Fun! I agree, it'd be nice to document this.
sunfishcode
on 20 Jul 2019
https://www.freedesktop.org/software/systemd/man/binfmt.d.html#
Looks like dropping that binfmt string into /etc/binfmt.d/wasmtime.conf should be enough on systemd systems. After that, I loaded the config by restarting the systemd-binfmt.service unit.
sudo systemctl restart systemd-binfmt
After that, I can execute wasm binaries directly.
bencord0
on 10 Oct 2019
As soon as wasmtime depends on you specifying command line flags sometimes, this has limited application.
It probably needs more thinking and involved establishing a "contract" within wasmtime that a user should always get a full experience without any flags.
igor-petruk
on 29 Oct 2019
I just added a Docker image to make this easy to try out with minimum setup work. Info available at https://hub.docker.com/repository/docker/renefonseca/wasmtime .
rene-fonseca
on 23 Jan 2020
This is untested, but an example to play with for the wast files I think should look like this.
:wasm32-wast:E:0:wat::/run/binfmt/wasmtime:
simcop2387
on 19 Nov 2020
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Most helpful comment
As soon as wasmtime depends on you specifying command line flags sometimes, this has limited application.
It probably needs more thinking and involved establishing a "contract" within wasmtime that a user should always get a full experience without any flags.