Crate os 

The main module and entrypoint

The operating system and app also starts in this module. Kernel code starts executing from entry.asm, after which rust_main() is called to initialize various pieces of functionality clear_bss(). (See its source code for details.)

We then call println! to display Hello, world!.

Modules

console 🔒

SBI console driver, for text output

lang_items 🔒

The panic handler

logging 🔒

sbi 🔒

Macros

linker_symbol_addr 🔒

print

print string macro

println

println string macro

Functions

clear_bss

clear BSS segment

rust_main

the rust entry-point of os