Tracking Issue for the `avr-interrupt`/`avr-non-blocking-interrupt` calling convention/ABI

[dylanmckay]

This is a tracking issue for the RFC "XXX" (rust-lang/rfcs#NNN).
The feature gate for the issue is #![feature(FFF)].

Steps

• Implement the RFC
• Adjust documentation (see instructions on rustc-guide)
• Stabilization PR (see instructions on rustc-guide)

Unresolved Questions

None yet.

Implementation history

• Enable AVR as a Tier 3 target upstream #69478 introduces AVR as a tier-3 target upstream

[dylanmckay]

Raised to appease tidy in #69478.

[joshtriplett]

In #40180 we mentioned wanting a (single) RFC for target-specific interrupt calling conventions, and that work is in progress in rust-lang/rfcs#3246; you may want to coordinate with that work in progress.