2021-02-20 05:13 UTC+0000 ~ grantseltzer <grantseltzer@xxxxxxxxx>
> This adds the CONFIG_DEBUG_INFO_BTF kernel compile option to output of
> the bpftool feature command. This is relevant for developers that want
> to use libbpf to account for data structure definition differences
> between kernels.
>
> Signed-off-by: grantseltzer <grantseltzer@xxxxxxxxx>
> ---
> tools/bpf/bpftool/feature.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/tools/bpf/bpftool/feature.c b/tools/bpf/bpftool/feature.c
> index 359960a8f..34343e7fa 100644
> --- a/tools/bpf/bpftool/feature.c
> +++ b/tools/bpf/bpftool/feature.c
> @@ -336,6 +336,8 @@ static void probe_kernel_image_config(const char *define_prefix)
> { "CONFIG_BPF_JIT", },
> /* Avoid compiling eBPF interpreter (use JIT only) */
> { "CONFIG_BPF_JIT_ALWAYS_ON", },
> + /* Enable using BTF debug information */
> + { "CONFIG_DEBUG_INFO_BTF", },
Nit: The comment is slightly misleading, you can use BTF to list program
C instructions or map structures without this option for example. Maybe
something like this?
/* Kernel BTF debug information available */
Thanks for the patch!
Quentin
