[PATCH v2 security-next 3/4] hornet: Add a light skeleton data extractor script

[Blaise Boscaccy]

This script eases light skeleton development against Hornet by
generating a data payload which can be used for signing a light
skeleton binary using sign-ebpf. The binary payload it generates
contains the skeleton's ebpf instructions followed by the skeleton
loader's map.

Signed-off-by: Blaise Boscaccy <bboscaccy at linux.microsoft.com>
---
 scripts/hornet/extract-skel.sh | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100755 scripts/hornet/extract-skel.sh

diff --git a/scripts/hornet/extract-skel.sh b/scripts/hornet/extract-skel.sh
new file mode 100755
index 000000000000..9ace78794b85
--- /dev/null
+++ b/scripts/hornet/extract-skel.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2025 Microsoft Corporation
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of version 2 of the GNU General Public
+# License as published by the Free Software Foundation.
+
+function usage() {
+    echo "Sample script for extracting instructions and map data out of"
+    echo "autogenerated eBPF lskel headers"
+    echo ""
+    echo "USAGE: header_file output_file"
+    exit
+}
+
+ARGC=$#
+
+EXPECTED_ARGS=2
+
+if [ $ARGC -ne $EXPECTED_ARGS ] ; then
+    usage
+else
+    printf $(gcc -E $1 | grep "static const char opts_insn" | \
+		 awk -F"=" '{print $2}' | sed 's/;\+$//' | sed 's/\"//g') > $2
+    printf $(gcc -E $1 | grep "static const char opts_data" | \
+		 awk -F"=" '{print $2}' | sed 's/;\+$//' | sed 's/\"//g') >> $2
+fi
-- 
2.48.1