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authorViktor Malik <vmalik@redhat.com>2023-03-10 08:41:00 +0100
committerAlexei Starovoitov <ast@kernel.org>2023-03-15 18:38:30 -0700
commitaa3d65de4b9004d799f97700751a86d3ebd7d5f9 (patch)
treeec9df74470d9a94d7cd6baaa2bd6a47453081879 /net
parent31bf1dbccfb0a9861d4846755096b3fff5687f8a (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.c5
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;
};