Hi David.
Thanks for the patch. Please see a few comments below.
> @@ -975,6 +978,161 @@ static tree bpf_core_compute (tree, vec
> *);
> static int bpf_core_get_index (const tree);
> static bool is_attr_preserve_access (tree);
>
> +static void
> +maybe_make_core_relo (tree expr, enum btf_c
Add BPF __builtin_preserve_field_info. This builtin is used to extract
information to facilitate struct and union relocations performed by the
BPF loader, especially for bitfields.
The builtin has the following signature:
unsigned int __builtin_preserve_field_info (EXPR, unsigned int KIND);
Wh
