um: Add compile time assert that stub fits on a page

The code assumes that the stub code can fit into a single page. This is unlikely to ever change, but add a link time assert instead so that there will be no hard to debug error. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Link: https://patch.msgid.link/20240919124511.282088-6-benjamin@sipsolutions.net Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2024-10-10 13:37:21 +02:00
parent fdb2ecd35d
commit 77eb31b600
1 changed files with 3 additions and 0 deletions
@@ -178,3 +178,6 @@ SECTIONS

  DISCARDS
 }
+
+ASSERT(__syscall_stub_end - __syscall_stub_start <= PAGE_SIZE,
+       "STUB code must not be larger than one page");