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authorAndrii Nakryiko <andriin@fb.com>2019-02-08 11:19:37 -0800
committerAlexei Starovoitov <ast@kernel.org>2019-02-08 12:04:13 -0800
commit02c874460f3d9213096323ac8a937fb486a4e70d (patch)
treee84c8a26ea0d7a4c727941f358572d7ea6f5afcb /tools/lib
parentd29d87f7e61226c339d1212beff6b82f653acd67 (diff)
downloadlinux-02c874460f3d9213096323ac8a937fb486a4e70d.tar.bz2
btf: expose API to work with raw btf data
This patch exposes new API btf__get_raw_data() that allows to get a copy of raw BTF data out of struct btf. This is useful for external programs that need to manipulate raw data, e.g., pahole using btf__dedup() to deduplicate BTF type info and then writing it back to file. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/bpf/btf.c6
-rw-r--r--tools/lib/bpf/btf.h1
-rw-r--r--tools/lib/bpf/libbpf.map1
3 files changed, 8 insertions, 0 deletions
diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 46db0a3b5cb7..4fba0aa989df 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -439,6 +439,12 @@ int btf__fd(const struct btf *btf)
return btf->fd;
}
+const void *btf__get_raw_data(const struct btf *btf, __u32 *size)
+{
+ *size = btf->data_size;
+ return btf->data;
+}
+
void btf__get_strings(const struct btf *btf, const char **strings,
__u32 *str_len)
{
diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h
index f55b7bc98d9e..10fe412461fe 100644
--- a/tools/lib/bpf/btf.h
+++ b/tools/lib/bpf/btf.h
@@ -66,6 +66,7 @@ LIBBPF_API const struct btf_type *btf__type_by_id(const struct btf *btf,
LIBBPF_API __s64 btf__resolve_size(const struct btf *btf, __u32 type_id);
LIBBPF_API int btf__resolve_type(const struct btf *btf, __u32 type_id);
LIBBPF_API int btf__fd(const struct btf *btf);
+LIBBPF_API const void *btf__get_raw_data(const struct btf *btf, __u32 *size);
LIBBPF_API void btf__get_strings(const struct btf *btf, const char **strings,
__u32 *str_len);
LIBBPF_API const char *btf__name_by_offset(const struct btf *btf, __u32 offset);
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index f5372df143f4..9e10467f8cbb 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -136,6 +136,7 @@ LIBBPF_0.0.2 {
btf__dedup;
btf__get_map_kv_tids;
btf__get_nr_types;
+ btf__get_raw_data;
btf__get_strings;
btf__load;
btf_ext__free;