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| author | Martin KaFai Lau <kafai@fb.com> | 2018-12-07 16:42:31 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-12-09 13:54:38 -0800 |
| commit | 3d65014146c69bbc4d2947f60dbd722d352cdc46 (patch) | |
| tree | ea591de92250d7ff871083d63bd5823c68b9bee9 /tools/lib/bpf/btf.h | |
| parent | f0187f0b17fad7439f510eff4d65606c9ea1190f (diff) | |
| download | linux-stable-3d65014146c69bbc4d2947f60dbd722d352cdc46.tar.gz linux-stable-3d65014146c69bbc4d2947f60dbd722d352cdc46.tar.bz2 linux-stable-3d65014146c69bbc4d2947f60dbd722d352cdc46.zip | |
bpf: libbpf: Add btf_line_info support to libbpf
This patch adds bpf_line_info support to libbpf:
1) Parsing the line_info sec from ".BTF.ext"
2) Relocating the line_info. If the main prog *_info relocation
fails, it will ignore the remaining subprog line_info and continue.
If the subprog *_info relocation fails, it will bail out.
3) BPF_PROG_LOAD a prog with line_info
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/lib/bpf/btf.h')
| -rw-r--r-- | tools/lib/bpf/btf.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index 936177a538cd..b0610dcdae6b 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -51,6 +51,8 @@ struct btf_ext_header { /* All offsets are in bytes relative to the end of this header */ __u32 func_info_off; __u32 func_info_len; + __u32 line_info_off; + __u32 line_info_len; }; typedef int (*btf_print_fn_t)(const char *, ...) @@ -70,10 +72,16 @@ LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf); struct btf_ext *btf_ext__new(__u8 *data, __u32 size, btf_print_fn_t err_log); void btf_ext__free(struct btf_ext *btf_ext); -int btf_ext__reloc_func_info(struct btf *btf, struct btf_ext *btf_ext, +int btf_ext__reloc_func_info(const struct btf *btf, + const struct btf_ext *btf_ext, const char *sec_name, __u32 insns_cnt, void **func_info, __u32 *func_info_len); +int btf_ext__reloc_line_info(const struct btf *btf, + const struct btf_ext *btf_ext, + const char *sec_name, __u32 insns_cnt, + void **line_info, __u32 *cnt); __u32 btf_ext__func_info_rec_size(const struct btf_ext *btf_ext); +__u32 btf_ext__line_info_rec_size(const struct btf_ext *btf_ext); #ifdef __cplusplus } /* extern "C" */ |