Can't use an AOT on an ESP32C3 · wamr

Stream: wamr

Topic: Can't use an AOT on an ESP32C3

Rusty (Dec 10 2023 at 04:36):

I'm on an ESP32C3, a riscv board. I'm trying to run an AOT wasm file. I find that os_mmap fails in espidf_memmap.c, specifically, heap_caps_malloc returns null when mem_caps is MALLOC_CAP_EXEC. When I replace MALLOC_CAP_EXEC with MALLC_CAP_DEFAULT, the initialization works fine. How can I get it to work?

Afonso Bordado (Dec 10 2023 at 10:03):

The ESP32-C3 uses a RISC-V 32 bit core, which is currently unsupported by wasmtime. We have discussed adding support for a very similar system (ESP32-C6) in this thread: https://github.com/bytecodealliance/wasmtime/issues/7311

The main missing parts are that cranelift, the compiler that wasmtime uses, supports RISC-V 64bit, but not 32bit. Adding support for that is quite a chunk of work.

If you need a WASM runtime in the meanwhile I would probably point you towards WAMR, that should work in that enviornment (RISC-V32 + ESP-IDF).

embedded support · Issue #7311 · bytecodealliance/wasmtime

my co-worker told me that wasmtime project wanted to hear use-cases/demands/requirements for embedded scenarios. here is FYI about our requirements. Feature support embedded environment by "embedde...

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Rusty (Dec 10 2023 at 18:48):

Afonso Bordado said:

The ESP32-C3 uses a RISC-V 32 bit core, which is currently unsupported by wasmtime. We have discussed adding support for a very similar system (ESP32-C6) in this thread: https://github.com/bytecodealliance/wasmtime/issues/7311

The main missing parts are that cranelift, the compiler that wasmtime uses, supports RISC-V 64bit, but not 32bit. Adding support for that is quite a chunk of work.

If you need a WASM runtime in the meanwhile I would probably point you towards WAMR, that should work in that enviornment (RISC-V32 + ESP-IDF).

The problem is in WAMR

Afonso Bordado (Dec 10 2023 at 19:04):

Oh, sorry, I mistakenly assumed this was wasmtime! I'm not too familiar with WAMR, so someone else might have to step in.

Notification Bot (Dec 11 2023 at 19:08):

This topic was moved here from #general > Can't use an AOT on an ESP32C3 by fitzgen (he/him).

Hytak (Apr 02 2024 at 22:34):

I got AOT working with ESP32C3 by writing a minimal platform layer that calls into rust to do the allocation. I don't know how to write C so I can't help you there.

Last updated: Oct 23 2024 at 20:03 UTC