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libbpf: Add internal helper to load BTF data by FD

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Add a btf_get_from_fd() helper, which constructs struct btf from in-kernel BTF
data by FD. This is used for loading module BTFs.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201203204634.1325171-4-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko
2020-12-03 12:46:23 -08:00
committed by Alexei Starovoitov
parent 2fe8890848
commit a19f93cfaf
2 changed files with 36 additions and 26 deletions
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1
tools/lib/bpf/libbpf_internal.h
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@@ -155,6 +155,7 @@ int bpf_object__section_size(const struct bpf_object *obj, const char *name,
__u32 *size);
int bpf_object__variable_offset(const struct bpf_object *obj, const char *name,
__u32 *off);
struct btf *btf_get_from_fd(int btf_fd, struct btf *base_btf);
struct btf_ext_info {
/*