Ilya Leoshkevich wrote:
> The logic follows that of BTF_KIND_INT most of the time. Sanitization
> replaces BTF_KIND_FLOATs with equally-sized empty BTF_KIND_STRUCTs on
> older kernels, for example, the following:
>
> [4] FLOAT 'float' size=4
>
> becomes the following:
>
> [4] STRUCT '(anon)' size=4 vlen=0
>
> Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
> Acked-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
> ---
[...]
> @@ -2445,6 +2450,10 @@ static void bpf_object__sanitize_btf(struct bpf_object *obj, struct btf *btf)
> } else if (!has_func_global && btf_is_func(t)) {
> /* replace BTF_FUNC_GLOBAL with BTF_FUNC_STATIC */
> t->info = BTF_INFO_ENC(BTF_KIND_FUNC, 0, 0);
> + } else if (!has_float && btf_is_float(t)) {
> + /* replace FLOAT with an equally-sized empty STRUCT */
> + t->name_off = 0;
Can we keep the name_off from btf__add_float()? Or just explain why
we zero it here, its not obvious to me at least.
> + t->info = BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 0);
> }
> }
> }
> @@ -3882,6 +3891,18 @@ static int probe_kern_btf_datasec(void)
