x86/tdx: Annotate a noreturn function

objdump complains: vmlinux.o: warning: objtool: __tdx_hypercall()+0x74: unreachable instruction because __tdx_hypercall_failed() won't return but panic the guest. Annotate that that is ok and desired. Fixes: eb94f1b ("x86/tdx: Add __tdx_module_call() and __tdx_hypercall() helper functions") Signed-off-by: Borislav Petkov <[email protected]> Link: https://lore.kernel.org/r/[email protected]
mpe · Apr 21, 2022 · 5af14c2 · 5af14c2
1 parent 5196401
commit 5af14c2
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/arch/x86/coco/tdx/tdcall.S b/arch/x86/coco/tdx/tdcall.S
@@ -200,5 +200,6 @@ SYM_FUNC_START(__tdx_hypercall)
 .Lpanic:
 	call __tdx_hypercall_failed
 	/* __tdx_hypercall_failed never returns */
+	REACHABLE
 	jmp .Lpanic
 SYM_FUNC_END(__tdx_hypercall)