From: Roger Pau Monne <roger.pau@citrix.com>
Date: Wed, 2 Mar 2022 14:27:09 +0000 (+0000)
Subject: livepatch: improve rune for fetching of Build ID
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=b1737f596c76dd7edf861bd80831396cd277e546;p=livepatch-build-tools.git

livepatch: improve rune for fetching of Build ID

The current one is broken with my version of readelf and returns
'NT_GNU_BUILD_ID'.

Signed-off-by: Roger Pau Monné <roger.pau@citrrix.com>
Reviewed-by: Bjoern Doebel <doebel@amazon.de>
Reviewed-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
---

diff --git a/README.md b/README.md
index b48a3df..948a7de 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ $ cp -r ~/src/xen ~/src/xenbuild
 $ cd ~/src/xen/xen
 $ make nconfig # Make sure to set CONFIG_LIVEPATCH=y
 $ make
-$ BUILDID=$(readelf -Wn xen-syms | awk '/Build ID:/ {print $3}')
+$ BUILDID=$(readelf -Wn xen-syms | sed -n -e 's/^.*Build ID: //p')
 ```
 
 Next, build a live patch, using a patch and the source, build ID, and