Support for s390x/systemz

[udai05]

Team,
I was wondering are we planning to add support for s390x platform soon.

[webmaster128]

No, we are not. Our priorities right now are ARM and Windows. Both are blocked by support of the singlepass backend of Wasmer.

[udai05]

Hi @webmaster128
Sorry for the late reply. I was trying to build wasmvm to see how much I can integrate wasmer to wasmvm.

"#make build-rust"...
...
   Compiling wasmvm v0.0.0 (/ossvg/udai/terra/wasmvm/libwasmvm)
error: unsupported platform
   --> /ossvg/udai/.cargo/registry/src/github.com-eae4ba8cbf2ce1c7/wasmer-vm-2.0.0/src/trap/traphandlers.rs:289:21
    |
289 |                     compile_error!("unsupported platform");
    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0308]: mismatched types
   --> /ossvg/udai/.cargo/registry/src/github.com-eae4ba8cbf2ce1c7/wasmer-vm-2.0.0/src/trap/traphandlers.rs:205:52
    |
205 |         unsafe fn get_pc(cx: *mut libc::c_void) -> *const u8 {
    |                   ------                           ^^^^^^^^^ expected *-ptr, found `()`
    |                   |
    |                   implicitly returns `()` as its body has no tail or `return` expression
    |
    = note: expected raw pointer `*const u8`
                 found unit type `()`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0308`.
error: could not compile `wasmer-vm`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: build failed
make: *** [Makefile:38: build-rust-release] Error 101..

Then I did a clone of wasmer. And after some changes I could get “make build-capi” completed.

Compiling wasmer-types v2.0.0 (/ossvg/udai/terra/wasmer/lib/types) Compiling addr2line v0.16.0 Compiling wasmer-wasi-types v2.0.0 (/ossvg/udai/terra/wasmer/lib/wasi-types) Compiling wasmer-c-api v2.0.0 (/ossvg/udai/terra/wasmer/lib/c-api) Compiling wasmer-compiler v2.0.0 (/ossvg/udai/terra/wasmer/lib/compiler) Compiling wasmer-engine v2.0.0 (/ossvg/udai/terra/wasmer/lib/engine) Compiling wasmer-object v2.0.0 (/ossvg/udai/terra/wasmer/lib/object) Compiling wasmer-engine-universal v2.0.0 (/ossvg/udai/terra/wasmer/lib/engine-universal) Compiling wasmer-engine-dylib v2.0.0 (/ossvg/udai/terra/wasmer/lib/engine-dylib) Compiling wasmer-engine-staticlib v2.0.0 (/ossvg/udai/terra/wasmer/lib/engine-staticlib) Compiling wasmer v2.0.0 (/ossvg/udai/terra/wasmer/lib/api) Compiling cranelift-frontend v0.76.0 Compiling wasmer-middlewares v2.0.0 (/ossvg/udai/terra/wasmer/lib/middlewares) Compiling wasmer-wasi v2.0.0 (/ossvg/udai/terra/wasmer/lib/wasi) Building [=======================> ] 211/213: cranelift-codegen Finished release [optimized] target(s) in 9m 29s udai@blkdom:~/terra/wasmer$

I need your help/directions to build "make build-wasmer". I am getting below error

warning: use of deprecated associated function `wasmer::WasmCell::<'a, T>::get_mut`: Please use the memory-safe set method instead
   --> lib/emscripten/src/env/unix/mod.rs:250:65
    |
250 |                 let mut pg = prev_guest.deref(&memory).unwrap().get_mut();
    |                                                                 ^^^^^^^
    |
    = note: `#[warn(deprecated)]` on by default

warning: use of deprecated associated function `wasmer::WasmCell::<'a, T>::get_mut`: Please use the memory-safe set method instead
   --> lib/emscripten/src/env/unix/mod.rs:262:81
    |
262 |                 let guest_sockaddr = guest_sockaddr_ptr.deref(&memory).unwrap().get_mut();
    |                                                                                 ^^^^^^^

warning: use of deprecated associated function `wasmer::WasmCell::<'a, T>::get_mut`: Please use the memory-safe set method instead
   --> lib/emscripten/src/env/unix/mod.rs:291:89
    |
291 |             let mut current_guest_node = current_guest_node_ptr.deref(&memory).unwrap().get_mut();
    |                                                                                         ^^^^^^^

warning: use of deprecated associated function `wasmer::WasmCell::<'a, T>::get_mut`: Please use the memory-safe set method instead
   --> lib/emscripten/src/syscalls/unix.rs:636:81
    |
636 |             let address_len_addr = unsafe { address_len.deref(&memory).unwrap().get_mut() };
    |                                                                                 ^^^^^^^

warning: use of deprecated associated function `wasmer::WasmCell::<'a, T>::get_mut`: Please use the memory-safe set method instead
   --> lib/emscripten/src/syscalls/unix.rs:646:73
    |
646 |             let address_addr = unsafe { address.deref(&memory).unwrap().get_mut() };
    |                                                                         ^^^^^^^

warning: use of deprecated associated function `wasmer::WasmCell::<'a, T>::get_mut`: Please use the memory-safe set method instead
   --> lib/emscripten/src/syscalls/unix.rs:670:81
    |
670 |             let address_len_addr = unsafe { address_len.deref(&memory).unwrap().get_mut() };
    |                                                                                 ^^^^^^^

warning: use of deprecated associated function `wasmer::WasmCell::<'a, T>::get_mut`: Please use the memory-safe set method instead
   --> lib/emscripten/src/syscalls/unix.rs:686:76
    |
686 |             let mut address_mut = unsafe { address.deref(&memory).unwrap().get_mut() };
    |                                                                            ^^^^^^^

warning: use of deprecated associated function `wasmer::WasmCell::<'a, T>::get_mut`: Please use the memory-safe set method instead
   --> lib/emscripten/src/syscalls/unix.rs:860:56
    |
860 |     let fds_mut = unsafe { fds.deref(&memory).unwrap().get_mut() };
    |                                                        ^^^^^^^

Sorry for the long reply as well.

[ethanfrey]

@US-05 We do not maintain wasmer.
Please reach out to the kind folks behind https://GitHub.com/wasmerio/wasmer

We need singlepass support from any supported os. And as wasmer does not support Windows or MacOS/arm64 yet for singlepass (but does for another non-blockchain backend), we cannot use it. I don't think s390x/systemz is high on their priority list, but if this is really important for a large (non-hobby) project, you can offer to support them to add it.

[webmaster128]

wasmerio/wasmer#2463 is where you can request support for that system. If for some reason we get it for free because singlepass v2 can be implemented without system-specific code, it should not be hard to make CosmWasm work with it.