Index: head/sys/arm/arm/vm_machdep.c
===================================================================
--- head/sys/arm/arm/vm_machdep.c
+++ head/sys/arm/arm/vm_machdep.c
@@ -220,7 +220,7 @@
 		/* nothing to do */
 		break;
 	default:
-		frame->tf_r0 = error;
+		frame->tf_r0 = SV_ABI_ERRNO(td->td_proc, error);
 		frame->tf_spsr |= PSR_C;    /* carry bit */
 		break;
 	}