Remove the shim kernel crate

kernel/src/syscall/getsockname.rs

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: MPL-2.0
+
+use super::SyscallReturn;
+use crate::{
+    fs::file_table::FileDesc,
+    prelude::*,
+    util::net::{get_socket_from_fd, write_socket_addr_to_user},
+};
+
+pub fn sys_getsockname(
+    sockfd: FileDesc,
+    addr: Vaddr,
+    addrlen_ptr: Vaddr,
+    _ctx: &Context,
+) -> Result<SyscallReturn> {
+    debug!("sockfd = {sockfd}, addr = 0x{addr:x}, addrlen_ptr = 0x{addrlen_ptr:x}");
+
+    let socket_addr = {
+        let socket = get_socket_from_fd(sockfd)?;
+        socket.addr()?
+    };
+
+    // FIXME: trunscate write len if addrlen is not big enough
+    write_socket_addr_to_user(&socket_addr, addr, addrlen_ptr)?;
+    Ok(SyscallReturn::Return(0))
+}