return btf->start_id + btf->nr_types - 1;
}
+struct btf_pipe {
+ const struct btf *src;
+ struct btf *dst;
+};
+
+static int btf_rewrite_str(__u32 *str_off, void *ctx)
+{
+ struct btf_pipe *p = ctx;
+ int off;
+
+ if (!*str_off) /* nothing to do for empty strings */
+ return 0;
+
+ off = btf__add_str(p->dst, btf__str_by_offset(p->src, *str_off));
+ if (off < 0)
+ return off;
+
+ *str_off = off;
+ return 0;
+}
+
+int btf__add_type(struct btf *btf, const struct btf *src_btf, const struct btf_type *src_type)
+{
+ struct btf_pipe p = { .src = src_btf, .dst = btf };
+ struct btf_type *t;
+ int sz, err;
+
+ sz = btf_type_size(src_type);
+ if (sz < 0)
+ return sz;
+
+ /* deconstruct BTF, if necessary, and invalidate raw_data */
+ if (btf_ensure_modifiable(btf))
+ return -ENOMEM;
+
+ t = btf_add_type_mem(btf, sz);
+ if (!t)
+ return -ENOMEM;
+
+ memcpy(t, src_type, sz);
+
+ err = btf_type_visit_str_offs(t, btf_rewrite_str, &p);
+ if (err)
+ return err;
+
+ return btf_commit_type(btf, sz);
+}
+
/*
* Append new BTF_KIND_INT type with:
* - *name* - non-empty, non-NULL type name;
LIBBPF_API int btf__find_str(struct btf *btf, const char *s);
LIBBPF_API int btf__add_str(struct btf *btf, const char *s);
+LIBBPF_API int btf__add_type(struct btf *btf, const struct btf *src_btf,
+ const struct btf_type *src_type);
LIBBPF_API int btf__add_int(struct btf *btf, const char *name, size_t byte_sz, int encoding);
LIBBPF_API int btf__add_float(struct btf *btf, const char *name, size_t byte_sz);