Re: [PATCH bpf-next 5/6] libbpf: add split BTF support for btf__load_from_kernel_by_id()

Add a new API function btf__load_from_kernel_by_id_split(), which takes
a pointer to a base BTF object in order to support split BTF objects
when retrieving BTF information from the kernel.

Reference: https://github.com/libbpf/libbpf/issues/314

Signed-off-by: Quentin Monnet <redacted>
---
 tools/lib/bpf/btf.c      | 10 ++++++++--
 tools/lib/bpf/btf.h      |  2 ++
 tools/lib/bpf/libbpf.map |  1 +
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 05b63b63083a..15967dd80ffb 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c

@@ -1383,7 +1383,8 @@ struct btf *btf_get_from_fd(int btf_fd, struct btf *base_btf)
        return btf;
 }

-int btf__load_from_kernel_by_id(__u32 id, struct btf **btf)
+int btf__load_from_kernel_by_id_split(__u32 id, struct btf **btf,
+                                     struct btf *base_btf)