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I tried this code with rustc --target riscv64gc-unknown-linux-gnu rust_code.rs
:
#![feature(abi_riscv_interrupt)]
pub extern "riscv-interrupt-m" fn interrupt_machine(_a: u8, _b: u8, _c: u8) {
}
pub extern "riscv-interrupt-s" fn interrupt_supervisor(_a: u8, _b: u8, _c: u8) {
}
pub fn main() {
interrupt_machine(1, 2, 3);
interrupt_supervisor(4, 5, 6);
}
I expected to see rustc catch this invalid signature.
Instead, this happened:
rustc-LLVM ERROR: Functions with the interrupt attribute cannot have arguments!
My understanding is that the same story applies for non-x86 interrupt ABIs like MSP430's.
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rustc --version --verbose
:
rustc 1.84.0-nightly (a0d98ff0e 2024-10-31)
binary: rustc
commit-hash: a0d98ff0e5b6e1f2c63fd26f68484792621b235c
commit-date: 2024-10-31
host: x86_64-unknown-linux-gnu
release: 1.84.0-nightly
LLVM version: 19.1.1
@rustbot label: +A-hardware-interrupts +A-LLVM +O-riscv +O-msp430 +A-ABI +T-compiler
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Area: Concerning the application binary interface (ABI)Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code for handling the "interrupt ABI" of various processorsCategory: This is a bug.Target: AVR processors (ATtiny, ATmega, etc.)Target: RISC-V architectureRelevant to the compiler team, which will review and decide on the PR/issue.