linux-kernel - [RFC bpf-next 13/13] bpf: Supporting building verifier.ko out-of-tree

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <2e31904051277ecff988530b50373d11efdcfaee.1744169424.git.dxu@dxuuu.xyz>
Date: Tue,  8 Apr 2025 21:34:08 -0600
From: Daniel Xu <dxu@...uu.xyz>
To: andrii@...nel.org,
	ast@...nel.org,
	daniel@...earbox.net
Cc: martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	john.fastabend@...il.com,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	haoluo@...gle.com,
	jolsa@...nel.org,
	linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org
Subject: [RFC bpf-next 13/13] bpf: Supporting building verifier.ko out-of-tree

This supports out-of-tree builds against the in-tree verifier.ko. This
is intended to be used to build newer upstream verifiers against older
kernel sources.

You can also do an "in-tree out-of-tree" build as proof of concept:

    $ make clean
    $ make modules_prepare
    $ cd kernel/bpf
    $ make -C ../.. M=$PWD

Signed-off-by: Daniel Xu <dxu@...uu.xyz>
---
 kernel/bpf/Kbuild | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 kernel/bpf/Kbuild

diff --git a/kernel/bpf/Kbuild b/kernel/bpf/Kbuild
new file mode 100644
index 000000000000..0b4a9ce14c6f
--- /dev/null
+++ b/kernel/bpf/Kbuild
@@ -0,0 +1,8 @@
+# Because Kbuild is preferred over Makefile for in-tree builds
+# but Kbuild is necessary for an out-of-tree module, we need an
+# explicit dispatch to Makefile if doing an in-tree build.
+ifneq ($(M),)
+	obj-m = verifier.o
+else
+	include $(src)/Makefile
+endif
-- 
2.47.1