2023-11-12 12:49 UTC+0000 ~ Alan Maguire <alan.maguire@xxxxxxxxxx>
> ...and provide an example of output.
>
> Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
> ---
> .../bpf/bpftool/Documentation/bpftool-btf.rst | 30 +++++++++++++++++--
> 1 file changed, 27 insertions(+), 3 deletions(-)
>
> diff --git a/tools/bpf/bpftool/Documentation/bpftool-btf.rst b/tools/bpf/bpftool/Documentation/bpftool-btf.rst
> index 342716f74ec4..ea8bb0a2041c 100644
> --- a/tools/bpf/bpftool/Documentation/bpftool-btf.rst
> +++ b/tools/bpf/bpftool/Documentation/bpftool-btf.rst
> @@ -28,7 +28,7 @@ BTF COMMANDS
> | **bpftool** **btf help**
> |
> | *BTF_SRC* := { **id** *BTF_ID* | **prog** *PROG* | **map** *MAP* [{**key** | **value** | **kv** | **all**}] | **file** *FILE* }
> -| *FORMAT* := { **raw** | **c** }
> +| *FORMAT* := { **raw** | **c** | **meta** }
> | *MAP* := { **id** *MAP_ID* | **pinned** *FILE* }
> | *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
>
> @@ -67,8 +67,8 @@ DESCRIPTION
> typically produced by clang or pahole.
>
> **format** option can be used to override default (raw)
> - output format. Raw (**raw**) or C-syntax (**c**) output
> - formats are supported.
> + output format. Raw (**raw**), C-syntax (**c**) and
> + BTF metadata (**meta**) formats are supported.
Please fix the indent for this line (it should be two tabs then two
spaces - yes I know it's a pain, we're working on improving this [0]).
[0] https://github.com/libbpf/bpftool/pull/111
>
> **bpftool btf help**
> Print short help message.
> @@ -266,3 +266,27 @@ All the standard ways to specify map or program are supported:
> [104859] FUNC 'smbalert_work' type_id=9695 linkage=static
> [104860] FUNC 'smbus_alert' type_id=71367 linkage=static
> [104861] FUNC 'smbus_do_alert' type_id=84827 linkage=static
> +
> +
> +**# bpftool btf dump file vmlinux format meta**
> +
> +::
> +
> + size 5161076
> + magic 0xeb9f
> + version 1
> + flags 0x1
> + hdr_len 40
> + type_len 3036368
> + type_off 0
> + str_len 2124588
> + str_off 3036368
> + kind_layout_len 80
> + kind_layout_off 5160956
> + crc 0x64af901b
> + base_crc 0x0
> + kind 0 UNKNOWN flags 0x0 info_sz 0 elem_sz 0
> + kind 1 INT flags 0x0 info_sz 0 elem_sz 0
> + kind 2 PTR flags 0x0 info_sz 0 elem_sz 0
> + kind 3 ARRAY flags 0x0 info_sz 0 elem_sz 0
> + kind 4 STRUCT flags 0x35 info_sz 0 elem_sz 0
