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Remove os/src/loader.rs

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This commit is contained in:
Yifan Wu 2022-01-18 04:29:38 -08:00
parent e9597d901b
commit b1b26fd788
1 changed files with 0 additions and 62 deletions
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62
os/src/loader.rs
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@ -1,62 +0,0 @@
use alloc::vec::Vec;
use lazy_static::*;
pub fn get_num_app() -> usize {
extern "C" { fn _num_app(); }
unsafe { (_num_app as usize as *const usize).read_volatile() }
}
pub fn get_app_data(app_id: usize) -> &'static [u8] {
extern "C" { fn _num_app(); }
let num_app_ptr = _num_app as usize as *const usize;
let num_app = get_num_app();
let app_start = unsafe {
core::slice::from_raw_parts(num_app_ptr.add(1), num_app + 1)
};
assert!(app_id < num_app);
unsafe {
core::slice::from_raw_parts(
app_start[app_id] as *const u8,
app_start[app_id + 1] - app_start[app_id]
)
}
}
lazy_static! {
static ref APP_NAMES: Vec<&'static str> = {
let num_app = get_num_app();
extern "C" { fn _app_names(); }
let mut start = _app_names as usize as *const u8;
let mut v = Vec::new();
unsafe {
for _ in 0..num_app {
let mut end = start;
while end.read_volatile() != '\0' as u8 {
end = end.add(1);
}
let slice = core::slice::from_raw_parts(start, end as usize - start as usize);
let str = core::str::from_utf8(slice).unwrap();
v.push(str);
start = end.add(1);
}
}
v
};
}
#[allow(unused)]
pub fn get_app_data_by_name(name: &str) -> Option<&'static [u8]> {
let num_app = get_num_app();
(0..num_app)
.find(|&i| APP_NAMES[i] == name)
.map(|i| get_app_data(i))
}
pub fn list_apps() {
println!("/**** APPS ****");
for app in APP_NAMES.iter() {
println!("{}", app);
}
println!("**************/");
}