Date: Wed, 29 Mar 2017 02:19:54 +0530 From: Shubham Bansal <illusionist.neo@...il.com> To: David Miller <davem@...emloft.net> Cc: Kees Cook <keescook@...omium.org>, Daniel Borkmann <daniel@...earbox.net>, Mircea Gherzan <mgherzan@...il.com>, Network Development <netdev@...r.kernel.org>, kernel-hardening@...ts.openwall.com, linux-arm-kernel@...ts.infradead.org Subject: Re: arch: arm: bpf: Converting cBPF to eBPF for arm 32 bit Thanks David. It helped a lot. Hi Daniel, Do you have any document to understand the working of tail calls? I looked at your presentations but it seemed confusing to me. Anything simple would be great, just about the tail calls. I don't think I need examples, I can get them from your presentations. I just need a very general idea. May be you know the code in kernel where it is implemented. Thanks for the help Daniel. Best, Shubham Bansal On Thu, Mar 16, 2017 at 3:25 AM, David Miller <davem@...emloft.net> wrote: > From: Shubham Bansal <illusionist.neo@...il.com> > Date: Wed, 15 Mar 2017 17:43:44 +0530 > >>> You can't truncate, but you'll have to build 64-bit ops using 32-bit registers. >> >> A small example would help a lot. > > You can simply perform 64-bit operations in C code and see what gcc > outputs for that code on this 32-bit target.
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