diff mbox series

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

Message ID 20250404215527.1563146-4-bboscaccy@linux.microsoft.com
State New
Headers show
Series [v2,security-next,1/4] security: Hornet LSM | expand

Commit Message

Blaise Boscaccy April 4, 2025, 9:54 p.m. UTC 
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@linux.microsoft.com>
---
 scripts/hornet/extract-skel.sh | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100755 scripts/hornet/extract-skel.sh
diff mbox series

Patch

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