a9n-abi

ABI definitions for the A9N Microkernel, including kernel call numbers, capability operation types, message register layouts, and low-level calling conventions.

LICENSE

MIT License

lib.rs:

ABI definitions for the A9N Microkernel user/kernel interface.

This crate defines the low-level calling conventions used to communicate with the A9N Microkernel from user space.

It contains ABI-level constants, operation numbers, message register layouts, kernel call identifiers, debug call identifiers, and capability operation definitions. These items describe how values from a9n-types are encoded into kernel calls and capability calls.

Architecture-specific trap invocation and register manipulation may be implemented in this crate or in architecture-specific modules owned by this crate. Higher-level, Rust-friendly wrappers should be implemented in a separate crate so that this crate remains a precise description of the ABI boundary.

In general:

• shared object/value definitions belong to a9n-types
• operation numbers and call layouts belong to a9n-abi
• safe wrappers and ergonomic APIs belong to higher-level crates

The definitions in this crate are part of the stable contract between user-level components and the kernel. Any change to numeric values, register assignments, bit layouts, or message formats should be treated as an ABI change.