linux/tools/bpf
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
..
bpftool bpftool: Dump more info about DATASEC members 2021-04-23 14:05:26 -07:00
resolve_btfids tools/resolve_btfids: Fix warnings 2021-03-31 12:09:12 -07:00
runqslower tools/runqslower: Allow substituting custom vmlinux.h for the build 2021-03-02 20:14:02 -08:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
bpf_asm.c docs: networking: convert filter.txt to ReST 2020-04-28 14:39:46 -07:00
bpf_dbg.c bpf: Simplify the calculation of variables 2021-03-04 19:24:53 -08:00
bpf_exp.l bpf: fix cbpf parser bug for octal numbers 2018-06-03 07:46:55 -07:00
bpf_exp.y tools, bpf_asm: Exit non-zero on errors 2021-02-26 22:53:50 +01:00
bpf_jit_disasm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232 2019-06-19 17:09:06 +02:00
Makefile tools/bpf: build: Make sure resolve_btfids cleans up after itself 2020-09-01 18:04:15 +02:00