Ilya Leoshkevich wrote:
> The logic follows that of BTF_KIND_INT most of the time. Sanitization
> replaces BTF_KIND_FLOATs with equally-sized BTF_KIND_INTs on older
^^^^^^^^^^^^^^^^^^^^^^^^^^^
Does this match the code though?
> kernels.
>
> Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
> ---
[...]
> @@ -2445,6 +2450,9 @@ 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 INT */
> + t->info = BTF_INFO_ENC(BTF_KIND_FLOAT, 0, 0);
Do we also need to encode the vlen here?
#define BTF_INFO_ENC(kind, kind_flag, vlen) \
((!!(kind_flag) << 31) | ((kind) << 24) | ((vlen) & BTF_MAX_VLEN))
> }
> }
> }
> @@ -3882,6 +3890,18 @@ static int probe_kern_btf_datasec(void)
> strs, sizeof(strs)));
> }
