remove unused syscall

Author: scPointer

os/src/config.rs

@@ -13,8 +13,6 @@ pub const KERNEL_HEAP_SIZE: usize = 0x200_0000;
 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

@@ -60,8 +60,6 @@ const SYSCALL_MMAP: usize = 222;
 const SYSCALL_WAITPID: usize = 260;
 /// spawn syscall
 const SYSCALL_SPAWN: usize = 400;
-/// taskinfo syscall
-const SYSCALL_TASK_INFO: usize = 410;
 
 mod fs;
 mod process;
@@ -98,7 +96,6 @@ pub fn syscall(syscall_id: usize, args: [usize; 4]) -> isize {
         SYSCALL_EXEC => sys_exec(args[0] as *const u8, args[1] as *const usize),
         SYSCALL_WAITPID => sys_waitpid(args[0] as isize, args[1] as *mut i32),
         SYSCALL_GET_TIME => sys_get_time(args[0] as *mut TimeVal, args[1]),
-        SYSCALL_TASK_INFO => sys_task_info(args[0] as *mut TaskInfo),
         SYSCALL_MMAP => sys_mmap(args[0], args[1], args[2]),
         SYSCALL_MUNMAP => sys_munmap(args[0], args[1]),
         SYSCALL_SBRK => sys_sbrk(args[0] as i32),

os/src/syscall/process.rs

@@ -1,12 +1,11 @@
 //! Process management syscalls
 
 use crate::{
-    config::MAX_SYSCALL_NUM,
     fs::{open_file, OpenFlags},
     mm::{translated_ref, translated_refmut, translated_str},
     task::{
         add_task, current_task, current_user_token, exit_current_and_run_next, pid2task,
-        suspend_current_and_run_next, SignalAction, SignalFlags, TaskStatus, MAX_SIG,
+        suspend_current_and_run_next, SignalAction, SignalFlags, MAX_SIG,
     },
 };
 use alloc::{string::String, sync::Arc, vec::Vec};
@@ -18,17 +17,6 @@ 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,
-}
-
 pub fn sys_exit(exit_code: i32) -> ! {
     trace!("kernel:pid[{}] sys_exit",current_task().unwrap().pid.0);
     exit_current_and_run_next(exit_code);
@@ -153,14 +141,6 @@ pub fn sys_get_time(_ts: *mut TimeVal, _tz: usize) -> isize {
     -1
 }
 
-/// 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().pid.0);
-    -1
-}
-
 /// YOUR JOB: Implement mmap.
 pub fn sys_mmap(_start: usize, _len: usize, _port: usize) -> isize {
     trace!("kernel:pid[{}] sys_mmap NOT IMPLEMENTED", current_task().unwrap().pid.0);