Remove the shim kernel crate

kernel/src/syscall/getresuid.rs

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: MPL-2.0
+
+use super::SyscallReturn;
+use crate::prelude::*;
+
+pub fn sys_getresuid(
+    ruid_ptr: Vaddr,
+    euid_ptr: Vaddr,
+    suid_ptr: Vaddr,
+    ctx: &Context,
+) -> Result<SyscallReturn> {
+    debug!("ruid_ptr = 0x{ruid_ptr:x}, euid_ptr = 0x{euid_ptr:x}, suid_ptr = 0x{suid_ptr:x}");
+
+    let credentials = ctx.posix_thread.credentials();
+    let user_space = ctx.get_user_space();
+
+    let ruid = credentials.ruid();
+    user_space.write_val(ruid_ptr, &ruid)?;
+
+    let euid = credentials.euid();
+    user_space.write_val(euid_ptr, &euid)?;
+
+    let suid = credentials.suid();
+    user_space.write_val(suid_ptr, &suid)?;
+
+    Ok(SyscallReturn::Return(0))
+}