sel4-sys: fix reference to __sel4_ipc_buffer

Change-Id: I6521cfc2693b949ca2f288ac4465bd5032ecaf26
GitOrigin-RevId: bb9bc2359a57d62d75d250861a0c128218c333f5

apps/system/components/kata-os-common/src/sel4-sys/arch/riscv.rs

@@ -94,9 +94,10 @@ pub enum seL4_ObjectType {
 
 #[inline(always)]
 pub unsafe fn seL4_GetIPCBuffer() -> *mut seL4_IPCBuffer {
-    // Magic external symbol setup by runtime once TLS is primed
+    // Use magic external symbol setup by runtime once TLS is primed
     enum c_void {}
     extern "C" {
+        #[thread_local]
         static __sel4_ipc_buffer: *const c_void;
     }
     __sel4_ipc_buffer as *mut seL4_IPCBuffer

apps/system/components/kata-os-common/src/sel4-sys/lib.rs

@@ -9,6 +9,7 @@
  */
 #![no_std]
 #![feature(asm)]
+#![feature(thread_local)]
 #![allow(bad_style, unused_parens, unused_assignments)]
 
 // NB: this mimics the logic in build.rs
@@ -151,7 +152,7 @@ pub const seL4_MsgMaxLength: usize = 120;
 pub const seL4_MsgExtraCapBits: usize = 2;
 pub const seL4_MsgMaxExtraCaps: usize = (1usize << seL4_MsgExtraCapBits) - 1;
 
-#[derive(Copy)]
+#[derive(Copy, Debug)]
 /// Buffer used to store received IPC messages
 pub struct seL4_IPCBuffer {
     /// Message tag