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* fix ci/cd error * update copyright year * Modify remaining years * solve ci report settings.json code style * update .prettierrc.json * prettierrc fix code style * fix rb file i.to_s and code style * fix error Line is too long. [101/100] * Modify the Ruby file format and restore other file formats * update makefile and readme file space |
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README.md
Tutorial 01 - Wait Forever
tl;dr
- The project skeleton is set up.
- A small piece of assembly code runs that just halts all CPU cores executing the kernel code.
Building
Makefile
targets:doc
: Generate documentation.qemu
: Run thekernel
in QEMUclippy
clean
readelf
: Inspect theELF
output.objdump
: Inspect the assembly.nm
: Inspect the symbols.
Code to look at
BSP
-specifickernel.ld
linker script.- Load address at
0x8_0000
- Only
.text
section.
- Load address at
main.rs
: Important inner attributes:#![no_std]
,#![no_main]
boot.s
: Assembly_start()
function that executeswfe
(Wait For Event), halting all cores that are executing_start()
.- We (have to) define a
#[panic_handler]
function to make the compiler happy.- Make it
unimplemented!()
because it will be stripped out since it is not used.
- Make it
Test it
In the project folder, invoke QEMU and observe the CPU core spinning on wfe
:
$ make qemu
[...]
IN:
0x00080000: d503205f wfe
0x00080004: 17ffffff b #0x80000