remove unused syscall

Author: scPointer

os/src/config.rs

@@ -14,8 +14,6 @@ pub const MEMORY_END: usize = 0x88000000;
 pub const PAGE_SIZE: usize = 0x1000;
 /// page size bits: 12
 pub const PAGE_SIZE_BITS: usize = 0xc;
-/// the max number of syscall
-pub const MAX_SYSCALL_NUM: usize = 500;
 /// the virtual addr of trapoline
 pub const TRAMPOLINE: usize = usize::MAX - PAGE_SIZE + 1;
 /// the virtual addr of trap context

os/src/syscall/mod.rs

@@ -74,8 +74,6 @@ pub const SYSCALL_MAIL_WRITE: usize = 402;
 pub const SYSCALL_DUP: usize = 24;
 /// pipe syscall
 pub const SYSCALL_PIPE: usize = 59;
-/// task info syscall
-pub const SYSCALL_TASK_INFO: usize = 410;
 /// thread_create syscall
 pub const SYSCALL_THREAD_CREATE: usize = 460;
 /// waittid syscall
@@ -137,7 +135,6 @@ pub fn syscall(syscall_id: usize, args: [usize; 4]) -> isize {
         SYSCALL_MMAP => sys_mmap(args[0], args[1], args[2]),
         SYSCALL_MUNMAP => sys_munmap(args[0], args[1]),
         SYSCALL_SET_PRIORITY => sys_set_priority(args[0] as isize),
-        SYSCALL_TASK_INFO => sys_task_info(args[0] as *mut TaskInfo),
         SYSCALL_SPAWN => sys_spawn(args[0] as *const u8),
         SYSCALL_THREAD_CREATE => sys_thread_create(args[0], args[1]),
         SYSCALL_WAITTID => sys_waittid(args[0]) as isize,

os/src/syscall/process.rs

@@ -1,10 +1,9 @@
 use crate::{
-    config::MAX_SYSCALL_NUM,
     fs::{open_file, OpenFlags},
     mm::{translated_ref, translated_refmut, translated_str},
     task::{
         current_process, current_task, current_user_token, exit_current_and_run_next, pid2process,
-        suspend_current_and_run_next, SignalFlags, TaskStatus,
+        suspend_current_and_run_next, SignalFlags,
     },
 };
 use alloc::{string::String, sync::Arc, vec::Vec};
@@ -16,16 +15,6 @@ pub struct TimeVal {
     pub usec: usize,
 }
 
-/// Task information
-#[allow(dead_code)]
-pub struct TaskInfo {
-    /// Task status in it's life cycle
-    status: TaskStatus,
-    /// The numbers of syscall called by task
-    syscall_times: [u32; MAX_SYSCALL_NUM],
-    /// Total running time of task
-    time: usize,
-}
 /// exit syscall
 ///
 /// exit the current task and run the next task in task list
@@ -170,19 +159,6 @@ pub fn sys_get_time(_ts: *mut TimeVal, _tz: usize) -> isize {
     -1
 }
 
-/// task_info syscall
-///
-/// YOUR JOB: Finish sys_task_info to pass testcases
-/// HINT: You might reimplement it with virtual memory management.
-/// HINT: What if [`TaskInfo`] is splitted by two pages ?
-pub fn sys_task_info(_ti: *mut TaskInfo) -> isize {
-    trace!(
-        "kernel:pid[{}] sys_task_info NOT IMPLEMENTED",
-        current_task().unwrap().process.upgrade().unwrap().getpid()
-    );
-    -1
-}
-
 /// mmap syscall
 ///
 /// YOUR JOB: Implement mmap.