Crate os

The main module and entrypoint

Various facilities of the kernels are implemented as submodules. The most important ones are:

• trap: Handles all cases of switching from userspace to the kernel
• task: Task management
• syscall: System call handling and implementation
• mm: Address map using SV39
• sync: Wrap a static data structure inside it so that we are able to access it without any unsafe.
• fs: Separate user from file system with some structures

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

We then call task::run_tasks() and for the first time go to userspace.

Modules

board 🔒

config 🔒

Constants used in rCore

console 🔒

SBI console driver, for text output

drivers 🔒

fs

File system in os

lang_items

The panic handler

mm

Memory management implementation

sbi

SBI call wrappers

sync

Synchronization and interior mutability primitives

syscall

Implementation of syscalls

task

Task management implementation

timer

RISC-V timer-related functionality

trap

Trap handling functionality

Macros

print

print string macro

println

println string macro

Functions

clear_bss 🔒

clear BSS segment

rust_main

the rust entry-point of os