Add ability to get base BTF. It can be also used to check if BTF is split BTF.
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
---
tools/lib/bpf/btf.c | 5 +++++
tools/lib/bpf/btf.h | 1 +
tools/lib/bpf/libbpf.map | 1 +
3 files changed, 7 insertions(+)
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 8ff46cd30ca1..1935e83d309c 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -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)
{
diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h
index 1093f6fe6800..1237bcd1dd17 100644
--- a/tools/lib/bpf/btf.h
+++ b/tools/lib/bpf/btf.h
@@ -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);
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 29ff4807b909..ed55498c4122 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -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;
--
2.24.1
