Re: [RFC PATCH v4 25/37] arm64: bpf: Skip validation of ___bpf_prog_run

From: Josh Poimboeuf
Date: Fri Apr 29 2022 - 16:09:20 EST


On Fri, Apr 29, 2022 at 01:13:40PM +0200, Peter Zijlstra wrote:
> On Fri, Apr 29, 2022 at 05:43:43PM +0800, Chen Zhongjin wrote:
> > There is a jump table encoded in ___bpf_prog_run and objtool-arm64
> > can't deal with it now. Skip validate it for arm64.
>
> But, but, but, an earlier patch did -fno-jump-tables!

IIRC, -fno-jump-tables is specific to switch statements but this
function has a C-implemented jump table.

--
Josh