livepatch-build: Handle newly created object files

Up to now the livepatch-build ignores newly created object files.
When patch applies new .c file and augments its Makefile to build it
the resulting object file is not taken into account for final linking
step.

Such newly created object files can be detected by comparing patched/
and original/ directories and copied over to the output directory for
the final linking step.

Signed-off-by: Pawel Wieczorkiewicz <wipawel@amazon.de>
Reviewed-by: Andra-Irina Paraschiv <andraprs@amazon.com>
Reviewed-by: Bjoern Doebel <doebel@amazon.de>
Reviewed-by: Norbert Manthey <nmanthey@amazon.de>

diff --git a/livepatch-build b/livepatch-build
index 796838c42487fdbf99b486590b4e8c8e3f464d3b..3c4bf138496d784c4311762c79674b82497d9730 100755 (executable)
--- a/livepatch-build
+++ b/livepatch-build
@@ -146,6 +146,12 @@ function create_patch()
         fi
     done
 
+    NEW_FILES=$(comm -23 <(cd patched/xen && find . -type f -name '*.o' | sort) <(cd original/xen && find . -type f -name '*.o' | sort))
+    for i in $NEW_FILES; do
+        cp "patched/$i" "output/$i"
+        CHANGED=1
+    done
+
     if [[ $ERROR -ne 0 ]]; then
         die "$ERROR error(s) encountered"
     fi