From 02c874460f3d9213096323ac8a937fb486a4e70d Mon Sep 17 00:00:00 2001 From: Andrii Nakryiko Date: Fri, 8 Feb 2019 11:19:37 -0800 Subject: 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 Acked-by: Song Liu Signed-off-by: Alexei Starovoitov --- tools/lib/bpf/btf.c | 6 ++++++ tools/lib/bpf/btf.h | 1 + tools/lib/bpf/libbpf.map | 1 + 3 files changed, 8 insertions(+) (limited to 'tools/lib') 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; -- cgit