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libbpf: Support BTF_KIND_TYPE_TAG

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Add libbpf support for BTF_KIND_TYPE_TAG.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211112012614.1505315-1-yhs@fb.com
This commit is contained in:
Yonghong Song
2021-11-11 17:26:14 -08:00
committed by Andrii Nakryiko
parent d932a1a46b
commit 98181e0546
6 changed files with 73 additions and 2 deletions
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9
src/btf.h
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@@ -227,6 +227,7 @@ LIBBPF_API int btf__add_typedef(struct btf *btf, const char *name, int ref_type_
LIBBPF_API int btf__add_volatile(struct btf *btf, int ref_type_id);
LIBBPF_API int btf__add_const(struct btf *btf, int ref_type_id);
LIBBPF_API int btf__add_restrict(struct btf *btf, int ref_type_id);
LIBBPF_API int btf__add_type_tag(struct btf *btf, const char *value, int ref_type_id);
/* func and func_proto construction APIs */
LIBBPF_API int btf__add_func(struct btf *btf, const char *name,
@@ -458,7 +459,8 @@ static inline bool btf_is_mod(const struct btf_type *t)
return kind == BTF_KIND_VOLATILE ||
kind == BTF_KIND_CONST ||
kind == BTF_KIND_RESTRICT;
kind == BTF_KIND_RESTRICT ||
kind == BTF_KIND_TYPE_TAG;
}
static inline bool btf_is_func(const struct btf_type *t)
@@ -491,6 +493,11 @@ static inline bool btf_is_decl_tag(const struct btf_type *t)
return btf_kind(t) == BTF_KIND_DECL_TAG;
}
static inline bool btf_is_type_tag(const struct btf_type *t)
{
return btf_kind(t) == BTF_KIND_TYPE_TAG;
}
static inline __u8 btf_int_encoding(const struct btf_type *t)
{
return BTF_INT_ENCODING(*(__u32 *)(t + 1));