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author | Andrii Nakryiko <andrii@kernel.org> | 2021-04-23 11:13:32 -0700 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2021-04-23 14:05:26 -0700 |
commit | 5b438f01d7eb2dc9bec7cd79de881b5f155d9a71 (patch) | |
tree | 26b0e249f1a86534e17a4743cc94b1632ff87f75 /include | |
parent | 0dd7e456bb049ec2b5a9e00250918b346c0d17d5 (diff) | |
download | linux-stable-5b438f01d7eb2dc9bec7cd79de881b5f155d9a71.tar.gz linux-stable-5b438f01d7eb2dc9bec7cd79de881b5f155d9a71.tar.bz2 linux-stable-5b438f01d7eb2dc9bec7cd79de881b5f155d9a71.zip |
bpftool: Dump more info about DATASEC members
Dump succinct information for each member of DATASEC: its kinds and name. This
is extremely helpful to see at a quick glance what is inside each DATASEC of
a given BTF. Without this, one has to jump around BTF data to just find out
the name of a VAR or FUNC. DATASEC's var_secinfo member is special in that
regard because it doesn't itself contain the name of the member, delegating
that to the referenced VAR and FUNC kinds. Other kinds, like
STRUCT/UNION/FUNC/ENUM, encode member names directly and thus are clearly
identifiable in BTF dump.
The new output looks like this:
[35] DATASEC '.bss' size=0 vlen=6
type_id=8 offset=0 size=4 (VAR 'input_bss1')
type_id=13 offset=0 size=4 (VAR 'input_bss_weak')
type_id=16 offset=0 size=4 (VAR 'output_bss1')
type_id=17 offset=0 size=4 (VAR 'output_data1')
type_id=18 offset=0 size=4 (VAR 'output_rodata1')
type_id=20 offset=0 size=8 (VAR 'output_sink1')
[36] DATASEC '.data' size=0 vlen=2
type_id=9 offset=0 size=4 (VAR 'input_data1')
type_id=14 offset=0 size=4 (VAR 'input_data_weak')
[37] DATASEC '.kconfig' size=0 vlen=2
type_id=25 offset=0 size=4 (VAR 'LINUX_KERNEL_VERSION')
type_id=28 offset=0 size=1 (VAR 'CONFIG_BPF_SYSCALL')
[38] DATASEC '.ksyms' size=0 vlen=1
type_id=30 offset=0 size=1 (VAR 'bpf_link_fops')
[39] DATASEC '.rodata' size=0 vlen=2
type_id=12 offset=0 size=4 (VAR 'input_rodata1')
type_id=15 offset=0 size=4 (VAR 'input_rodata_weak')
[40] DATASEC 'license' size=0 vlen=1
type_id=24 offset=0 size=4 (VAR 'LICENSE')
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210423181348.1801389-3-andrii@kernel.org
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions