Attribute Macro post_init 

#[post_init]

Attribute to mark which function will be called before jumping to the entry point. You must enable the post-init feature in the riscv-rt crate to use this macro.

In contrast with __pre_init, this function is called after the static variables are initialized, so it is safe to access them. It is also safe to run Rust code.

The function must have the signature of [unsafe] fn([usize]), where the argument corresponds to the hart ID of the current hart. This is useful for multi-hart systems to perform hart-specific initialization.

IMPORTANT

This attribute can appear at most once in the dependency graph.

Examples

use riscv_rt_macros::post_init;
#[post_init]
unsafe fn before_main(hart_id: usize) {
    // do something here
}