diff options
| author | Andrii Nakryiko <andrii@kernel.org> | 2021-03-18 12:40:26 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-03-18 16:14:22 -0700 |
| commit | f36e99a45dbe76949eb99bba413c67eda5cd2591 (patch) | |
| tree | 85e7df4c53f34e48a47c9e9c410f1da9c432165a /tools/lib/bpf/libbpf_internal.h | |
| parent | e14ef4bf011192b61b48c4f3a35b3041140073ff (diff) | |
libbpf: Generalize BTF and BTF.ext type ID and strings iteration
Extract and generalize the logic to iterate BTF type ID and string offset
fields within BTF types and .BTF.ext data. Expose this internally in libbpf
for re-use by bpf_linker.
Additionally, complete strings deduplication handling for BTF.ext (e.g., CO-RE
access strings), which was previously missing. There previously was no
case of deduplicating .BTF.ext data, but bpf_linker is going to use it.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210318194036.3521577-3-andrii@kernel.org
Diffstat (limited to 'tools/lib/bpf/libbpf_internal.h')
| -rw-r--r-- | tools/lib/bpf/libbpf_internal.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf_internal.h b/tools/lib/bpf/libbpf_internal.h index d09860e435c8..97b6b9cc9839 100644 --- a/tools/lib/bpf/libbpf_internal.h +++ b/tools/lib/bpf/libbpf_internal.h @@ -356,4 +356,11 @@ struct bpf_core_relo { enum bpf_core_relo_kind kind; }; +typedef int (*type_id_visit_fn)(__u32 *type_id, void *ctx); +typedef int (*str_off_visit_fn)(__u32 *str_off, void *ctx); +int btf_type_visit_type_ids(struct btf_type *t, type_id_visit_fn visit, void *ctx); +int btf_type_visit_str_offs(struct btf_type *t, str_off_visit_fn visit, void *ctx); +int btf_ext_visit_type_ids(struct btf_ext *btf_ext, type_id_visit_fn visit, void *ctx); +int btf_ext_visit_str_offs(struct btf_ext *btf_ext, str_off_visit_fn visit, void *ctx); + #endif /* __LIBBPF_LIBBPF_INTERNAL_H */ |