Re: [LSF/MM/BPF TOPIC] Compiled BPF and toolchains

[Yonghong Song <yonghong.song@linux.dev>]

On 2/21/24 3:09 AM, Jose E. Marchesi wrote:
> The discussions we had last year in LSFMMBPF about BPF support in GCC
> were very useful, and led to more and better interactions between the
> BPF GCC maintainers, the BPF clang maintainers and the rest of the BPF
> community.  This helped a lot to achieve better convergence with clang.
>
> We think it would be good to repeat the experience this year with a
> session where we could discuss particular topics related to compiled BPF
> in general, like the toolchain requirements introduced by the new
> features being proposed for BPF (such as supporting segmented stacks,

It will be shadow stack, as suggested by Alexei, in order to
maintain the current seemless support for stack backtracing.

> just to mention a recent one) and how to better support these in both
> GCC and clang.

Another topic worth gcc involvement is potential compiler support for 
static key in bpf programs. 
https://lore.kernel.org/bpf/CAADnVQJ+_+ok_io1_W7e5z_dZhxSqhEFZQkumRgmY4AJRYwW7g@mail.gmail.com/