selftests/bpf: Skip module_fentry_shadow test when bpf_testmod is not available

2023-09-14T18:16:13+00:00

This test relies on bpf_testmod, so skip it if the module is not available. Fixes: aa3d65de4b900 ("bpf/selftests: Test fentry attachment to shadowed functions") Signed-off-by: Artem Savkov Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20230914124928.340701-1-asavkov@redhat.com

bpf/selftests: Test fentry attachment to shadowed functions

2023-03-16T01:38:30+00:00

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 Acked-by: Jiri Olsa Link: https://lore.kernel.org/r/5fe2f364190b6f79b085066ed7c5989c5bc475fa.1678432753.git.vmalik@redhat.com Signed-off-by: Alexei Starovoitov

kernel/linux.git/tools/testing/selftests/bpf/prog_tests/module_fentry_shadow.c, branch v6.7

selftests/bpf: Skip module_fentry_shadow test when bpf_testmod is not available

bpf/selftests: Test fentry attachment to shadowed functions