chore: dummy implement syscall mount/umount

kernel/src/main.rs

@@ -58,13 +58,13 @@ fn run_test() -> ! {
         "getcwd",
         // "munmap",
         "pipe",
-        // "umount",
+        "umount",
         "close",
         "getppid",
         "chdir",
         "open",
         // "clone",
-        // "mount",
+        "mount",
         "exit",
         "sleep",
         // "mmap",

kernel/src/syscall/fs.rs

@@ -132,3 +132,13 @@ pub fn sys_pipe(pipe_ptr: *mut i32) -> isize {
     }
     0
 }
+
+pub fn sys_mount(_source_ptr: *const u8, _target_ptr: *const u8, _fs_type_ptr: *const u8) -> isize {
+    // unsupported for rust-fatfs
+    0
+}
+
+pub fn sys_umount(_target_ptr: *const u8) -> isize {
+    // unsupported for rust-fatfs
+    0
+}

kernel/src/syscall/mod.rs

@@ -24,6 +24,8 @@ const SYSCALL_CLOSE: usize = 57;
 const SYSCALL_MKDIR: usize = 34;
 const SYSCALL_PIPE: usize = 59;
 const SYSCALL_NANO_SLEEP: usize = 101;
+const SYSCALL_MOUNT: usize = 40;
+const SYSCALL_UMOUNT: usize = 39;
 
 pub fn syscall(id: usize, args: [usize; 6]) -> isize {
     match id {
@@ -45,6 +47,8 @@ pub fn syscall(id: usize, args: [usize; 6]) -> isize {
         SYSCALL_MKDIR => sys_mkdir(args[0], args[1] as *const u8, args[2]),
         SYSCALL_PIPE => sys_pipe(args[0] as *mut i32),
         SYSCALL_NANO_SLEEP => sys_nanosleep(args[0] as *const u8, args[1]),
+        SYSCALL_MOUNT => sys_mount(args[0] as *const u8, args[1] as *const u8, args[2] as *const u8),
+        SYSCALL_UMOUNT => sys_umount(args[0] as *const u8),
         _ => {
             error!("Unsupported syscall id: {}", id);
             sys_exit(-1);