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libbpf: Check the kflag of type tags in btf_dump

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If the kflag is set for a BTF type tag, then the tag represents an
arbitrary __attribute__. Change btf_dump accordingly.

Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250130201239.1429648-4-ihor.solodrai@linux.dev
This commit is contained in:
Ihor Solodrai 2025-01-30 12:12:36 -08:00 committed by Andrii Nakryiko
parent ea70faa1f2
commit 2019c58318
1 changed files with 4 additions and 1 deletions
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5
tools/lib/bpf/btf_dump.c
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@ -1494,7 +1494,10 @@ static void btf_dump_emit_type_chain(struct btf_dump *d,
case BTF_KIND_TYPE_TAG: case BTF_KIND_TYPE_TAG:
btf_dump_emit_mods(d, decls); btf_dump_emit_mods(d, decls);
name = btf_name_of(d, t->name_off); name = btf_name_of(d, t->name_off);
btf_dump_printf(d, " __attribute__((btf_type_tag(\"%s\")))", name); if (btf_kflag(t))
btf_dump_printf(d, " __attribute__((%s))", name);
else
btf_dump_printf(d, " __attribute__((btf_type_tag(\"%s\")))", name);
break; break;
case BTF_KIND_ARRAY: { case BTF_KIND_ARRAY: {
const struct btf_array *a = btf_array(t); const struct btf_array *a = btf_array(t);