26 struct btf {  struct
40 static int btf_add_type(struct btf *btf, struct btf_type *t)  in btf_add_type()  argument
42 	if (btf->types_size - btf->nr_types < 2) {  in btf_add_type()
46 		if (btf->types_size == BTF_MAX_NR_TYPES)  in btf_add_type()
49 		expand_by = max(btf->types_size >> 2, 16);  in btf_add_type()
50 		new_size = min(BTF_MAX_NR_TYPES, btf->types_size + expand_by);  in btf_add_type()
52 		new_types = realloc(btf->types, sizeof(*new_types) * new_size);  in btf_add_type()
56 		if (btf->nr_types == 0)  in btf_add_type()
59 		btf->types = new_types;  in btf_add_type()
60 		btf->types_size = new_size;  in btf_add_type()
63 	btf->types[++(btf->nr_types)] = t;  in btf_add_type()
68 static int btf_parse_hdr(struct btf *btf, btf_print_fn_t err_log)  in btf_parse_hdr()  argument
70 	const struct btf_header *hdr = btf->hdr;  in btf_parse_hdr()
73 	if (btf->data_size < sizeof(struct btf_header)) {  in btf_parse_hdr()
93 	meta_left = btf->data_size - sizeof(*hdr);  in btf_parse_hdr()
119 	btf->nohdr_data = btf->hdr + 1;  in btf_parse_hdr()
124 static int btf_parse_str_sec(struct btf *btf, btf_print_fn_t err_log)  in btf_parse_str_sec()  argument
126 	const struct btf_header *hdr = btf->hdr;  in btf_parse_str_sec()
127 	const char *start = btf->nohdr_data + hdr->str_off;  in btf_parse_str_sec()
128 	const char *end = start + btf->hdr->str_len;  in btf_parse_str_sec()
136 	btf->strings = start;  in btf_parse_str_sec()
141 static int btf_parse_type_sec(struct btf *btf, btf_print_fn_t err_log)  in btf_parse_type_sec()  argument
143 	struct btf_header *hdr = btf->hdr;  in btf_parse_type_sec()
144 	void *nohdr_data = btf->nohdr_data;  in btf_parse_type_sec()
181 		err = btf_add_type(btf, t);  in btf_parse_type_sec()
189 const struct btf_type *btf__type_by_id(const struct btf *btf, __u32 type_id)  in btf__type_by_id()  argument
191 	if (type_id > btf->nr_types)  in btf__type_by_id()
194 	return btf->types[type_id];  in btf__type_by_id()
224 __s64 btf__resolve_size(const struct btf *btf, __u32 type_id)  in btf__resolve_size()  argument
232 	t = btf__type_by_id(btf, type_id);  in btf__resolve_size()
257 		t = btf__type_by_id(btf, type_id);  in btf__resolve_size()
269 int btf__resolve_type(const struct btf *btf, __u32 type_id)  in btf__resolve_type()  argument
274 	t = btf__type_by_id(btf, type_id);  in btf__resolve_type()
279 		t = btf__type_by_id(btf, type_id);  in btf__resolve_type()
289 __s32 btf__find_by_name(const struct btf *btf, const char *type_name)  in btf__find_by_name()  argument
296 	for (i = 1; i <= btf->nr_types; i++) {  in btf__find_by_name()
297 		const struct btf_type *t = btf->types[i];  in btf__find_by_name()
298 		const char *name = btf__name_by_offset(btf, t->name_off);  in btf__find_by_name()
307 void btf__free(struct btf *btf)  in btf__free()  argument
309 	if (!btf)  in btf__free()
312 	if (btf->fd != -1)  in btf__free()
313 		close(btf->fd);  in btf__free()
315 	free(btf->data);  in btf__free()
316 	free(btf->types);  in btf__free()
317 	free(btf);  in btf__free()
320 struct btf *btf__new(__u8 *data, __u32 size, btf_print_fn_t err_log)  in btf__new()
324 	struct btf *btf;  in btf__new()  local
327 	btf = calloc(1, sizeof(struct btf));  in btf__new()
328 	if (!btf)  in btf__new()
331 	btf->fd = -1;  in btf__new()
343 	btf->data = malloc(size);  in btf__new()
344 	if (!btf->data) {  in btf__new()
349 	memcpy(btf->data, data, size);  in btf__new()
350 	btf->data_size = size;  in btf__new()
352 	btf->fd = bpf_load_btf(btf->data, btf->data_size,  in btf__new()
355 	if (btf->fd == -1) {  in btf__new()
363 	err = btf_parse_hdr(btf, err_log);  in btf__new()
367 	err = btf_parse_str_sec(btf, err_log);  in btf__new()
371 	err = btf_parse_type_sec(btf, err_log);  in btf__new()
377 		btf__free(btf);  in btf__new()
381 	return btf;  in btf__new()
384 int btf__fd(const struct btf *btf)  in btf__fd()  argument
386 	return btf->fd;  in btf__fd()
389 const char *btf__name_by_offset(const struct btf *btf, __u32 offset)  in btf__name_by_offset()  argument
391 	if (offset < btf->hdr->str_len)  in btf__name_by_offset()
392 		return &btf->strings[offset];  in btf__name_by_offset()