@@ -1126,6 +1126,81 @@ static int btf_save_raw(const struct btf *btf, const char *path)
return err;
}
+struct btfgen_type {
+ struct btf_type *type;
+ unsigned int id;
+};
+
+struct btfgen_info {
+ struct hashmap *types;
+ struct btf *src_btf;
+};
+
+static size_t btfgen_hash_fn(const void *key, void *ctx)
+{
+ return (size_t)key;
+}
+
+static bool btfgen_equal_fn(const void *k1, const void *k2, void *ctx)
+{
+ return k1 == k2;
+}
+
+static void *uint_as_hash_key(int x)
+{
+ return (void *)(uintptr_t)x;
+}
+
+static void btfgen_free_type(struct btfgen_type *type)
+{
+ free(type);
+}
+
+static void btfgen_free_info(struct btfgen_info *info)
+{
+ struct hashmap_entry *entry;
+ size_t bkt;
+
+ if (!info)
+ return;
+
+ if (!IS_ERR_OR_NULL(info->types)) {
+ hashmap__for_each_entry(info->types, entry, bkt) {
+ btfgen_free_type(entry->value);
+ }
+ hashmap__free(info->types);
+ }
+
+ btf__free(info->src_btf);
+
+ free(info);
+}
+
+static struct btfgen_info *
+btfgen_new_info(const char *targ_btf_path)
+{
+ struct btfgen_info *info;
+
+ info = calloc(1, sizeof(*info));
+ if (!info)
+ return NULL;
+
+ info->src_btf = btf__parse(targ_btf_path, NULL);
+ if (libbpf_get_error(info->src_btf)) {
+ btfgen_free_info(info);
+ return NULL;
+ }
+
+ info->types = hashmap__new(btfgen_hash_fn, btfgen_equal_fn, NULL);
+ if (IS_ERR(info->types)) {
+ errno = -PTR_ERR(info->types);
+ btfgen_free_info(info);
+ return NULL;
+ }
+
+ return info;
+}
+
/* Create BTF file for a set of BPF objects */
static int btfgen(const char *src_btf, const char *dst_btf, const char *objspaths[])
{