Re: [PATCH v4 bpf-next 2/2] selftests/bpf: add a ksym iter subtest

[Andrii Nakryiko]

On Wed, Jul 6, 2022 at 6:17 AM Alan Maguire <alan.maguire@xxxxxxxxxx> wrote:
>
> add subtest verifying BPF ksym iter behaviour.  The BPF ksym
> iter program shows an example of dumping a format different to
> /proc/kallsyms.  It adds KIND and MAX_SIZE fields which represent the
> kind of symbol (core kernel, module, ftrace, bpf, or kprobe) and
> the maximum size the symbol can be.  The latter is calculated from
> the difference between current symbol value and the next symbol
> value.
>
> The key benefit for this iterator will likely be supporting in-kernel
> data-gathering rather than dumping symbol details to userspace and
> parsing the results.
>
> Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
> Acked-by: Yonghong Song <yhs@xxxxxx>
> ---

Please see progs/bpf_iter.h and add ksym iterator types there. Thanks!


>  tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 16 +++++
>  tools/testing/selftests/bpf/progs/bpf_iter_ksym.c | 74 +++++++++++++++++++++++
>  2 files changed, 90 insertions(+)
>  create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_ksym.c
>

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