diff options
| author | Andrii Nakryiko <andriin@fb.com> | 2019-05-24 20:59:03 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-05-24 23:05:58 +0200 |
| commit | 351131b51c7a27daf0fbdce80b619b8d130374c6 (patch) | |
| tree | a6dc197b7f4fa83f8b8b83b6c19460a79a0feea4 /tools/lib/bpf/btf.h | |
| parent | libbpf: switch btf_dedup() to hashmap for dedup table (diff) | |
| download | linux-351131b51c7a27daf0fbdce80b619b8d130374c6.tar.xz linux-351131b51c7a27daf0fbdce80b619b8d130374c6.zip | |
libbpf: add btf_dump API for BTF-to-C conversion
BTF contains enough type information to allow generating valid
compilable C header w/ correct layout of structs/unions and all the
typedef/enum definitions. This patch adds a new "object" - btf_dump to
facilitate dumping BTF as valid C. btf_dump__dump_type() is the main API
which takes care of dumping out (through user-provided printf-like
callback function) C definitions for given type ID and it's required
dependencies. This allows for not just dumping out entirety of BTF types,
but also selective filtering based on user-provided criterias w/ minimal
set of dependent types.
Signed-off-by: Andrii Nakryiko <andriin@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 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index bded210df9e8..ba4ffa831aa4 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -4,6 +4,7 @@ #ifndef __LIBBPF_BTF_H #define __LIBBPF_BTF_H +#include <stdarg.h> #include <linux/types.h> #ifdef __cplusplus @@ -102,6 +103,22 @@ struct btf_dedup_opts { LIBBPF_API int btf__dedup(struct btf *btf, struct btf_ext *btf_ext, const struct btf_dedup_opts *opts); +struct btf_dump; + +struct btf_dump_opts { + void *ctx; +}; + +typedef void (*btf_dump_printf_fn_t)(void *ctx, const char *fmt, va_list args); + +LIBBPF_API struct btf_dump *btf_dump__new(const struct btf *btf, + const struct btf_ext *btf_ext, + const struct btf_dump_opts *opts, + btf_dump_printf_fn_t printf_fn); +LIBBPF_API void btf_dump__free(struct btf_dump *d); + +LIBBPF_API int btf_dump__dump_type(struct btf_dump *d, __u32 id); + #ifdef __cplusplus } /* extern "C" */ #endif |