novafacing / cannonball Goto Github PK

To allow writing Rust TCG plugins also on macOS and Windows platforms, see novafacing/memfd-exec#1

Hi there, thank you for your great work! This tool is really helpful.

I found that when I try to cargo build with Cannonball, the compiler reports a panic like below:

thread 'main' panicked at '"qemu_info_t_struct_(unnamed_at_/home/xxx/target/debug/build/cannonball-6e02cc1f64a0c3b4/out/qemu-plugin_h_68_5)" is not a valid Ident', /home/xxx/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.69/src/fallback.rs:817:9

This error is caused by the combination of bindgen < 0.62 and Clang > 16, which was fixed in bindgen 0.62.0 version, maybe we can just update the bind dependencies to fix this.

Not really an issue, but to answer your question, qemu_plugin_outs seems to output on the plugin log item, so you need -d plugin on the command line.

QEMU master branch has support for windows plugins now. I'd like to be able to use this crate on Windows, to build plugin DLLs, but there's a few wrinkles in the way:

1. Building QEMU on windows is possible, but only in an MSYS environment. The qemu crate is not designed to build on Windows and makes heavy use of memfd, which (afaik) will never work on Windows.
2. On Windows in addition to the qemu-plugin.h, there needs to be a (built) libqemu_api_plugin.a delaylib archive to link plugins against.
3. Cannonball will need a delaylink hook exposed, similar to this one

I'm not sure what the best way to go on this is (and I understand if you don't think it's worth the effort). I'm going to try removing the dependency on qemu and getting the necessary files from somewhere else (checked in files? download published binaries?)