Explain EBL ABI policy.

diff --git a/README b/README
index afc94077ea8ce57aedafc360e729f1acda022331..33cac74f19dc1439640ccc1b741e5fda3e3f45f4 100644 (file)
--- a/README
+++ b/README
@@ -4,3 +4,9 @@ Fundamental design decision:
   This leaves byte ordering aside.  While assuming this the code can be
   greatly simplified and speed increases.  Since no change violating this
   assumption is in sight this is believed to be a worthwhile optimization.
+
+- the ABI of the backend modules is not guaranteed.  Really, not guarantee
+  whatsoever.  We are enforcing this in the code.  The modules and their
+  users must match.  No third-party EBL module are supported or allowed.
+  The only reason there are separate modules is to not have the code for
+  all architectures in all the binaries.