From: Eduard Zingerman <eddyz87@gmail.com>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Andrii Nakryiko <andrii@kernel.org>,
bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
martin.lau@kernel.org, kernel-team@meta.com
Subject: Re: [PATCH v2 bpf 5/5] libbpf: warn on unexpected __arg_ctx type when rewriting BTF
Date: Fri, 19 Jan 2024 03:00:01 +0200 [thread overview]
Message-ID: <b1b0c9d161ecb80df4385978a2fd770a8248691b.camel@gmail.com> (raw)
In-Reply-To: <CAEf4BzbRfMx5s9YvjHkQ+yjAd8EB43Lk_jg3Jg8oEnt=pjr8FQ@mail.gmail.com>
On Thu, 2024-01-18 at 16:53 -0800, Andrii Nakryiko wrote:
[...]
> yes, it's a slight deviation from what I ended up doing in the kernel,
> because I initially didn't know how to deal with arch-specific
> definitions of bpf_user_pt_regs_t. But at the last moment I figured
> out that __builtin_types_compatible_p and forward declaring structs
> works, so I'll do a small follow up to libbpf to match kernel logic
> completely
Understood, thank you.
I didn't know about __builtin_types_compatible_p() before seeing it in
your patch. Full 'Other-Builtins' page of GCC doc turned out to be
interesting.
next prev parent reply other threads:[~2024-01-19 1:00 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-17 22:33 [PATCH v2 bpf 0/5] Tighten up arg:ctx type enforcement Andrii Nakryiko
2024-01-17 22:33 ` [PATCH v2 bpf 1/5] libbpf: feature-detect arg:ctx tag support in kernel Andrii Nakryiko
2024-01-18 19:50 ` Eduard Zingerman
2024-01-19 0:43 ` Andrii Nakryiko
2024-01-19 0:46 ` Eduard Zingerman
2024-01-17 22:33 ` [PATCH v2 bpf 2/5] bpf: extract bpf_ctx_convert_map logic and make it more reusable Andrii Nakryiko
2024-01-17 22:33 ` [PATCH v2 bpf 3/5] bpf: enforce types for __arg_ctx-tagged arguments in global subprogs Andrii Nakryiko
2024-01-18 19:50 ` Eduard Zingerman
2024-01-19 0:50 ` Andrii Nakryiko
2024-01-17 22:33 ` [PATCH v2 bpf 4/5] selftests/bpf: add tests confirming type logic in kernel for __arg_ctx Andrii Nakryiko
2024-01-17 22:33 ` [PATCH v2 bpf 5/5] libbpf: warn on unexpected __arg_ctx type when rewriting BTF Andrii Nakryiko
2024-01-18 19:50 ` Eduard Zingerman
2024-01-19 0:53 ` Andrii Nakryiko
2024-01-19 1:00 ` Eduard Zingerman [this message]
2024-01-18 19:49 ` [PATCH v2 bpf 0/5] Tighten up arg:ctx type enforcement Eduard Zingerman
2024-01-18 19:53 ` Eduard Zingerman
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