# [−] [src] Macro cortex_m_rt::pre_init

    macro_rules! pre_init {
        ($handler:path) => { ... };
    }

Macro to set the function to be called at the beginning of the reset handler.

The function must have the signature of `unsafe fn()`.

The function passed will be called before static variables are initialized. Any access of static variables will result in undefined behavior.

# Examples

ⓘThis example is not tested

    pre_init!(foo::bar);

    mod foo {
        pub unsafe fn bar() {
            // do something here
        }
    }

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