jonaskruckenberg.de
Next Generation WASM Microkernel Operating System
1// Copyright 2025 Jonas Kruckenberg
2//
3// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
4// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
5// http://opensource.org/licenses/MIT>, at your option. This file may not be
6// copied, modified, or distributed except according to those terms.
7
8use crate::backtrace::BacktraceStyle;
9use crate::device_tree::DeviceTree;
10use crate::tracing::Filter;
11use core::str::FromStr;
12
13pub fn parse(devtree: &DeviceTree) -> crate::Result<Bootargs> {
14 let chosen = devtree.find_by_path("/chosen").unwrap();
15 let Some(prop) = chosen.property("bootargs") else {
16 return Ok(Bootargs::default());
17 };
18
19 Bootargs::from_str(prop.as_str()?)
20}
21
22#[derive(Default)]
23pub struct Bootargs {
24 pub log: Filter,
25 pub backtrace: BacktraceStyle,
26}
27
28impl FromStr for Bootargs {
29 type Err = anyhow::Error;
30
31 fn from_str(s: &str) -> Result<Self, Self::Err> {
32 let mut log = None;
33 let mut backtrace = None;
34
35 let parts = s.trim().split(';');
36 for part in parts {
37 if let Some(current) = part.strip_prefix("log=") {
38 log = Some(Filter::from_str(current)?);
39 }
40
41 if let Some(current) = part.strip_prefix("backtrace=") {
42 backtrace = Some(BacktraceStyle::from_str(current)?);
43 }
44 }
45
46 Ok(Self {
47 log: log.unwrap_or_default(),
48 backtrace: backtrace.unwrap_or_default(),
49 })
50 }
51}