linux/tools/bpf/bpftool
Andrii Nakryiko 5b438f01d7 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
2021-04-23 14:05:26 -07:00
..
bash-completion bpftool: Add gen object command to perform BPF static linking 2021-03-18 16:14:23 -07:00
Documentation bpftool: Add gen object command to perform BPF static linking 2021-03-18 16:14:23 -07:00
skeleton tools, bpftool: Remove two unused variables. 2020-10-29 15:23:18 +01:00
.gitignore tools/bpf: Remove bpf-helpers from bpftool docs 2021-03-04 18:39:45 -08:00
btf_dumper.c tools/bpftool: Add BTF_KIND_FLOAT support 2021-03-04 17:58:15 -08:00
btf.c bpftool: Dump more info about DATASEC members 2021-04-23 14:05:26 -07:00
cfg.c tools, bpftool: Poison and replace kernel integer typedefs 2020-05-11 21:20:46 +02:00
cfg.h tools: bpftool: replace Netronome boilerplate with SPDX license headers 2018-12-13 12:08:44 +01:00
cgroup.c tools, bpftool: Clean subcommand help messages 2020-06-01 14:38:18 -07:00
common.c sock_map: Introduce BPF_SK_SKB_VERDICT 2021-04-01 10:56:14 -07:00
feature.c bpf: Add kernel/modules BTF presence checks to bpftool feature command 2021-02-24 17:24:37 +01:00
gen.c bpftool: Add gen object command to perform BPF static linking 2021-03-18 16:14:23 -07:00
iter.c tools/bpf: Support new uapi for map element bpf iterator 2020-08-06 16:39:14 -07:00
jit_disasm.c tools/bpf/bpftool: Remove duplicate headers 2020-04-26 08:40:01 -07:00
json_writer.c bpftool: Support dumping metadata 2020-09-15 18:28:27 -07:00
json_writer.h bpftool: Support dumping metadata 2020-09-15 18:28:27 -07:00
link.c bpftool: Implement link_query for bpf iterators 2020-08-21 14:01:39 -07:00
main.c bpftool: Fix maybe-uninitialized warnings 2021-03-16 12:26:49 -07:00
main.h tools/bpftool: Add bpftool support for split BTF 2020-11-05 18:37:31 -08:00
Makefile New features: 2021-02-22 13:59:43 -08:00
map_perf_ring.c tools, bpftool: Poison and replace kernel integer typedefs 2020-05-11 21:20:46 +02:00
map.c bpftool: Fix maybe-uninitialized warnings 2021-03-16 12:26:49 -07:00
net.c bpftool: Fix a clang compilation warning 2021-04-15 16:50:22 -07:00
netlink_dumper.c bpftool: Use consistent include paths for libbpf 2020-01-20 16:37:45 -08:00
netlink_dumper.h tools: bpftool: dual license all files 2018-12-13 12:08:44 +01:00
perf.c tools, bpftool: Clean subcommand help messages 2020-06-01 14:38:18 -07:00
pids.c tools/bpftool: Fix PID fetching with a lot of results 2020-12-08 16:45:20 +01:00
prog.c sock_map: Introduce BPF_SK_SKB_VERDICT 2021-04-01 10:56:14 -07:00
struct_ops.c tools, bpftool: Clean subcommand help messages 2020-06-01 14:38:18 -07:00
tracelog.c tools: bpftool: add an option to prevent auto-mount of bpffs, tracefs 2018-12-18 14:47:17 +01:00
xlated_dumper.c bpftool: Print subprog address properly 2021-02-26 13:23:53 -08:00
xlated_dumper.h tools: bpftool: replace Netronome boilerplate with SPDX license headers 2018-12-13 12:08:44 +01:00