diff options
| author | Viktor Malik <vmalik@redhat.com> | 2023-03-10 08:41:00 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-03-15 18:38:30 -0700 |
| commit | aa3d65de4b9004d799f97700751a86d3ebd7d5f9 (patch) | |
| tree | ec9df74470d9a94d7cd6baaa2bd6a47453081879 /net | |
| parent | 31bf1dbccfb0a9861d4846755096b3fff5687f8a (diff) | |
bpf/selftests: Test fentry attachment to shadowed functions
Adds a new test that tries to attach a program to fentry of two
functions of the same name, one located in vmlinux and the other in
bpf_testmod.
To avoid conflicts with existing tests, a new function
"bpf_fentry_shadow_test" was created both in vmlinux and in bpf_testmod.
The previous commit fixed a bug which caused this test to fail. The
verifier would always use the vmlinux function's address as the target
trampoline address, hence trying to create two trampolines for a single
address, which is forbidden.
The test (similarly to other fentry/fexit tests) is not working on arm64
at the moment.
Signed-off-by: Viktor Malik <vmalik@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/5fe2f364190b6f79b085066ed7c5989c5bc475fa.1678432753.git.vmalik@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bpf/test_run.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index 6a8b33a103a4..71226f68270d 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -560,6 +560,11 @@ long noinline bpf_kfunc_call_test4(signed char a, short b, int c, long d) return (long)a + (long)b + (long)c + d; } +int noinline bpf_fentry_shadow_test(int a) +{ + return a + 1; +} + struct prog_test_member1 { int a; }; |