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mod context;
mod manager;
mod pid;
mod processor;
pub mod signal;
mod switch;
mod task;
use crate::fs::{open, DiskInodeType, File, OpenFlags, open_root_inode};
use alloc::sync::Arc;
pub use context::TaskContext;
use lazy_static::*;
use manager::fetch_task;
pub use signal::*;
use switch::__switch;
pub use task::{execve, FdTable, Rusage, TaskControlBlock, TaskStatus};
pub use manager::{
add_task, find_task_by_pid, procs_count, sleep_interruptible, wake_interruptible,
};
pub use pid::{pid_alloc, KernelStack, PidHandle};
pub use processor::{
current_task, current_trap_cx, current_user_token, run_tasks, schedule, take_current_task,
};
pub fn suspend_current_and_run_next() {
let task = take_current_task().unwrap();
let mut task_inner = task.acquire_inner_lock();
let task_cx_ptr2 = task_inner.get_task_cx_ptr2();
task_inner.task_status = TaskStatus::Ready;
drop(task_inner);
add_task(task);
schedule(task_cx_ptr2);
}
pub fn block_current_and_run_next() {
let task = take_current_task().unwrap();
let mut task_inner = task.acquire_inner_lock();
let task_cx_ptr2 = task_inner.get_task_cx_ptr2();
task_inner.task_status = TaskStatus::Interruptible;
drop(task_inner);
sleep_interruptible(task);
schedule(task_cx_ptr2);
}
pub fn exit_current_and_run_next(exit_code: u32) -> ! {
let task = take_current_task().unwrap();
let mut inner = task.acquire_inner_lock();
{
let parent_task = inner.parent.as_ref().unwrap().upgrade().unwrap();
let mut parent_inner = parent_task.acquire_inner_lock();
parent_inner.add_signal(Signals::SIGCHLD);
if parent_inner.task_status == TaskStatus::Interruptible {
parent_inner.task_status = TaskStatus::Ready;
wake_interruptible(parent_task.clone());
}
}
log::info!(
"[sys_exit] Trying to exit pid {} with {}",
task.pid.0,
exit_code
);
inner.task_status = TaskStatus::Zombie;
inner.exit_code = exit_code;
{
let mut initproc_inner = INITPROC.acquire_inner_lock();
for child in inner.children.iter() {
child.acquire_inner_lock().parent = Some(Arc::downgrade(&INITPROC));
initproc_inner.children.push(child.clone());
}
}
inner.children.clear();
inner.memory_set.recycle_data_pages();
drop(inner);
log::info!("[sys_exit] Pid {} exited with {}", task.pid.0, exit_code);
drop(task);
let _unused: usize = 0;
schedule(&_unused as *const _);
panic!("Unreachable");
}
lazy_static! {
pub static ref INITPROC: Arc<TaskControlBlock> = Arc::new({
let inode = open(&open_root_inode(), "initproc", OpenFlags::O_RDONLY, DiskInodeType::File).unwrap();
let start: usize = crate::config::MMAP_BASE;
let len = inode.size();
crate::mm::KERNEL_SPACE.lock().insert_framed_area(
start.into(),
(start + len).into(),
crate::mm::MapPermission::R | crate::mm::MapPermission::W,
);
unsafe {
let buffer = core::slice::from_raw_parts_mut(start as *mut u8, len);
inode.kread(None, buffer);
TaskControlBlock::new(buffer)
}
});
}
pub fn add_initproc() {
add_task(INITPROC.clone());
}
#[derive(Clone, Copy)]
#[allow(non_camel_case_types, unused)]
#[repr(usize)]
pub enum AuxvType {
NULL = 0,
IGNORE = 1,
EXECFD = 2,
PHDR = 3,
PHENT = 4,
PHNUM = 5,
PAGESZ = 6,
BASE = 7,
FLAGS = 8,
ENTRY = 9,
NOTELF = 10,
UID = 11,
EUID = 12,
GID = 13,
EGID = 14,
PLATFORM = 15,
HWCAP = 16,
CLKTCK = 17,
FPUCW = 18,
DCACHEBSIZE = 19,
ICACHEBSIZE = 20,
UCACHEBSIZE = 21,
IGNOREPPC = 22,
SECURE = 23,
BASE_PLATFORM = 24,
RANDOM = 25,
HWCAP2 = 26,
EXECFN = 31,
SYSINFO = 32,
SYSINFO_EHDR = 33,
L1I_CACHESHAPE = 34,
L1D_CACHESHAPE = 35,
L2_CACHESHAPE = 36,
L3_CACHESHAPE = 37,
L1I_CACHESIZE = 40,
L1I_CACHEGEOMETRY = 41,
L1D_CACHESIZE = 42,
L1D_CACHEGEOMETRY = 43,
L2_CACHESIZE = 44,
L2_CACHEGEOMETRY = 45,
L3_CACHESIZE = 46,
L3_CACHEGEOMETRY = 47,
MINSIGSTKSZ = 51,
}
#[derive(Clone, Copy)]
#[allow(unused)]
pub struct AuxvEntry {
auxv_type: AuxvType,
auxv_val: usize,
}
impl AuxvEntry {
fn new(auxv_type: AuxvType, auxv_val: usize) -> Self {
Self {
auxv_type,
auxv_val,
}
}
}
pub struct ELFInfo {
pub entry: usize,
pub phnum: usize,
pub phent: usize,
pub phdr: usize,
}