# `abi_msp430_interrupt`

The tracking issue for this feature is: #38487

In the MSP430 architecture, interrupt handlers have a special calling convention. You can use the `"msp430-interrupt"` ABI to make the compiler apply the right calling convention to the interrupt handlers you define.

    #![feature(abi_msp430_interrupt)]
    #![no_std]

    // Place the interrupt handler at the appropriate memory address
    // (Alternatively, you can use `#[used]` and remove `pub` and `#[no_mangle]`)
    #[link_section = "__interrupt_vector_10"]
    #[no_mangle]
    pub static TIM0_VECTOR: extern "msp430-interrupt" fn() = tim0;

    // The interrupt handler
    extern "msp430-interrupt" fn tim0() {
        // ..
    }

    $ msp430-elf-objdump -CD ./target/msp430/release/app
    Disassembly of section __interrupt_vector_10:

    0000fff2 <TIM0_VECTOR>:
        fff2:       00 c0           interrupt service routine at 0xc000

    Disassembly of section .text:

    0000c000 <int::tim0>:
        c000:       00 13           reti