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libbpf: Add btf__new_empty() to create an empty BTF object

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Add an ability to create an empty BTF object from scratch. This is going to be
used by pahole for BTF encoding. And also by selftest for convenient creation
of BTF objects.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200926011357.2366158-7-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
2020-09-25 18:13:54 -07:00
committed by Andrii Nakryiko
parent 7ac1547f32
commit 3cfff16611
3 changed files with 32 additions and 0 deletions
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src/btf.h
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@@ -27,6 +27,7 @@ struct bpf_object;
LIBBPF_API void btf__free(struct btf *btf);
LIBBPF_API struct btf *btf__new(const void *data, __u32 size);
LIBBPF_API struct btf *btf__new_empty(void);
LIBBPF_API struct btf *btf__parse(const char *path, struct btf_ext **btf_ext);
LIBBPF_API struct btf *btf__parse_elf(const char *path, struct btf_ext **btf_ext);
LIBBPF_API struct btf *btf__parse_raw(const char *path);