Refactor project structure

kernel/aster-nix/src/syscall/prctl.rs

@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: MPL-2.0
+
+use super::{SyscallReturn, SYS_PRCTL};
+use crate::{
+    log_syscall_entry,
+    prelude::*,
+    process::posix_thread::{PosixThreadExt, MAX_THREAD_NAME_LEN},
+    util::{read_cstring_from_user, write_bytes_to_user},
+};
+pub fn sys_prctl(option: i32, arg2: u64, arg3: u64, arg4: u64, arg5: u64) -> Result<SyscallReturn> {
+    log_syscall_entry!(SYS_PRCTL);
+    let prctl_cmd = PrctlCmd::from_args(option, arg2, arg3, arg4, arg5)?;
+    debug!("prctl cmd = {:x?}", prctl_cmd);
+    let current_thread = current_thread!();
+    let posix_thread = current_thread.as_posix_thread().unwrap();
+    match prctl_cmd {
+        PrctlCmd::PR_GET_NAME(write_to_addr) => {
+            let thread_name = posix_thread.thread_name().lock();
+            if let Some(thread_name) = &*thread_name {
+                if let Some(thread_name) = thread_name.name()? {
+                    write_bytes_to_user(write_to_addr, thread_name.to_bytes_with_nul())?;
+                }
+            }
+        }
+        PrctlCmd::PR_SET_NAME(read_addr) => {
+            let mut thread_name = posix_thread.thread_name().lock();
+            if let Some(thread_name) = &mut *thread_name {
+                let new_thread_name = read_cstring_from_user(read_addr, MAX_THREAD_NAME_LEN)?;
+                thread_name.set_name(&new_thread_name)?;
+            }
+        }
+        _ => todo!(),
+    }
+    Ok(SyscallReturn::Return(0))
+}
+
+const PR_SET_NAME: i32 = 15;
+const PR_GET_NAME: i32 = 16;
+const PR_SET_TIMERSLACK: i32 = 29;
+const PR_GET_TIMERSLACK: i32 = 30;
+
+#[allow(non_camel_case_types)]
+#[derive(Debug, Clone, Copy)]
+pub enum PrctlCmd {
+    PR_SET_NAME(Vaddr),
+    PR_GET_NAME(Vaddr),
+    PR_SET_TIMERSLACK(u64),
+    PR_GET_TIMERSLACK,
+}
+
+impl PrctlCmd {
+    fn from_args(option: i32, arg2: u64, arg3: u64, arg4: u64, arg5: u64) -> Result<PrctlCmd> {
+        match option {
+            PR_SET_NAME => Ok(PrctlCmd::PR_SET_NAME(arg2 as _)),
+            PR_GET_NAME => Ok(PrctlCmd::PR_GET_NAME(arg2 as _)),
+            PR_GET_TIMERSLACK => todo!(),
+            PR_SET_TIMERSLACK => todo!(),
+            _ => {
+                debug!("prctl cmd number: {}", option);
+                return_errno_with_message!(Errno::EINVAL, "unsupported prctl command");
+            }
+        }
+    }
+}