libbpf: Handle non-standardly sized enums better in BTF-to-C dumper

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Turns out C allows to force enum to be 1-byte or 8-byte explicitly using
mode(byte) or mode(word), respecticely. Linux sources are using this in
some cases. This is imporant to handle correctly, as enum size
determines corresponding fields in a struct that use that enum type. And
if enum size is incorrect, this will lead to invalid struct layout. So
add mode(byte) and mode(word) attribute support to btf_dump APIs.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20221212211505.558851-3-andrii@kernel.org

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Andrii Nakryiko 2022-12-12 13:15:01 -08:00 • committed by Daniel Borkmann

parent 872aec4b5f

commit 21a9a1bccc

1 changed files with 38 additions and 0 deletions

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tools/lib/bpf/btf_dump.c

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