Guide: Custom Wasm guests
ABI
Export from your module:
| Export | Signature | Role |
|---|---|---|
memory | linear memory | required |
chimera_alloc | (i32) -> i32 | allocate len bytes |
chimera_dealloc | (i32, i32) | free |
chimera_execute | (in_ptr, in_len, out_ptr, out_cap) -> i32 | run slice; return bytes written or negative error |
Input layout
[u64 seed][u32 count][u32 pad][f32 × count]
Output layout
[u64 checksum][u32 count][u32 pad][f32 × count]
Build the sample guest
cargo build -p chimera-guest --release --target wasm32-unknown-unknown
Artifact: target/wasm32-unknown-unknown/release/chimera_guest.wasm
Run with custom module
cargo run -- --wasm path/to/module.wasm --demo-slices 2 --no-tui
If --wasm is omitted, Chimera loads an embedded WAT demo kernel.