From 05f7e38f9d1d6198a80b982a8b38fc15156e9ae5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gustavo=20I=C3=B1iguez=20Goia?= <gooffy1@gmail.com>
Date: Wed, 21 Apr 2021 20:49:31 +0200
Subject: [PATCH] ebpf: added patch to compile ebpf module for arm

---
 ebpf_prog/README                  | 12 +++++++++++-
 ebpf_prog/arm-clang-asm-fix.patch | 14 ++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 ebpf_prog/arm-clang-asm-fix.patch

diff --git a/ebpf_prog/README b/ebpf_prog/README
index 08d930c0..119ea487 100644
--- a/ebpf_prog/README
+++ b/ebpf_prog/README
@@ -16,4 +16,14 @@ cd ../../../daemon
 --opensnitchd expects to find opensnitch.o in /etc/opensnitchd/
 --start opensnitchd with:
 
-opensnitchd -rules-path /etc/opensnitchd/rules -process-monitor-method ebpf
\ No newline at end of file
+opensnitchd -rules-path /etc/opensnitchd/rules -process-monitor-method ebpf
+
+The kernel where you intend to run it must have some options activated:
+
+$ grep BPF /boot/config-$(uname -r)
+CONFIG_CGROUP_BPF=y
+CONFIG_BPF=y
+CONFIG_BPF_SYSCALL=y
+CONFIG_BPF_EVENTS=y
+CONFIG_KPROBES=y
+CONFIG_KPROBE_EVENTS=y
diff --git a/ebpf_prog/arm-clang-asm-fix.patch b/ebpf_prog/arm-clang-asm-fix.patch
new file mode 100644
index 00000000..d8dd3945
--- /dev/null
+++ b/ebpf_prog/arm-clang-asm-fix.patch
@@ -0,0 +1,14 @@
+--- ../../arch/arm/include/asm/unified.h	2021-04-20 10:47:54.075834124 +0000
++++ ../../arch/arm/include/asm/unified-clang-fix.h	2021-04-20 10:47:38.943811970 +0000
+@@ -11,7 +11,10 @@
+ #if defined(__ASSEMBLY__)
+ 	.syntax unified
+ #else
+-__asm__(".syntax unified");
++//__asm__(".syntax unified");
++#ifndef __clang__
++	__asm__(".syntax unified");
++#endif
+ #endif
+ 
+ #ifdef CONFIG_CPU_V7M