Commit 0cfdcd63 authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Alexei Starovoitov
Browse files

libbpf: Add base BTF accessor 



Add ability to get base BTF. It can be also used to check if BTF is split BTF.

Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201202065244.530571-3-andrii@kernel.org
parent 71ccb500

tools/lib/bpf/btf.c

+5 −0
Original line number Diff line number Diff line
@@ -432,6 +432,11 @@ __u32 btf__get_nr_types(const struct btf *btf) 
	return btf->start_id + btf->nr_types - 1;

}



const struct btf *btf__base_btf(const struct btf *btf)

{

	return btf->base_btf;

}



/* internal helper returning non-const pointer to a type */

static struct btf_type *btf_type_by_id(struct btf *btf, __u32 type_id)

{

tools/lib/bpf/btf.h

+1 −0
Original line number Diff line number Diff line
@@ -51,6 +51,7 @@ LIBBPF_API __s32 btf__find_by_name(const struct btf *btf, 
LIBBPF_API __s32 btf__find_by_name_kind(const struct btf *btf,

					const char *type_name, __u32 kind);

LIBBPF_API __u32 btf__get_nr_types(const struct btf *btf);

LIBBPF_API const struct btf *btf__base_btf(const struct btf *btf);

LIBBPF_API const struct btf_type *btf__type_by_id(const struct btf *btf,

						  __u32 id);

LIBBPF_API size_t btf__pointer_size(const struct btf *btf);

tools/lib/bpf/libbpf.map

+1 −0
Original line number Diff line number Diff line
@@ -340,6 +340,7 @@ LIBBPF_0.2.0 { 


LIBBPF_0.3.0 {

	global:

		btf__base_btf;

		btf__parse_elf_split;

		btf__parse_raw_split;

		btf__parse_split;