Function riscv_rt::start_rust

#[link_section = ".init.rust"]
#[export_name = "_start_rust"]
pub unsafe extern "C" fn start_rust(
    a0: usize, 
    a1: usize, 
    a2: usize
) -> !

Rust entry point (_start_rust)

Zeros bss section, initializes data section and calls main. This function never returns.