From: Shubham Bansal <illusionist.neo@gmail.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Miller <davem@davemloft.net>,
Kees Cook <keescook@chromium.org>,
Mircea Gherzan <mgherzan@gmail.com>,
Network Development <netdev@vger.kernel.org>,
kernel-hardening@lists.openwall.com,
linux-arm-kernel@lists.infradead.org, ast@fb.com
Subject: Re: arch: arm: bpf: Converting cBPF to eBPF for arm 32 bit
Date: Thu, 30 Mar 2017 19:34:16 +0530 [thread overview]
Message-ID: <CAHgaXdKfbob3WHMho32JSh_dmfp2A=cjcePqk+NfajVpShPE6Q@mail.gmail.com> (raw)
In-Reply-To: <58DAF908.8010404@iogearbox.net>
Thanks Daniel.
Can you tell me how to test the eBPF JIT compiler? It would be great
if you could tell me starting from compiling to proper testing.
Best,
Shubham Bansal
On Wed, Mar 29, 2017 at 5:30 AM, Daniel Borkmann <daniel@iogearbox.net> wrote:
> Hi Shubham,
>
> On 03/28/2017 10:49 PM, Shubham Bansal wrote:
> [...]
>>
>> 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.
>
>
> Sure, it's in __bpf_prog_run(), see the JMP_TAIL_CALL (kernel/bpf/core.c
> +1019).
> That's effectively what JITs implement. [1] page 3 has a high-level
> description
> as well, hope that helps.
>
> Thanks,
> Daniel
>
> [1]
> http://www.netdevconf.org/1.1/proceedings/papers/On-getting-tc-classifier-fully-programmable-with-cls-bpf.pdf
WARNING: multiple messages have this Message-ID (diff)
From: illusionist.neo@gmail.com (Shubham Bansal)
To: linux-arm-kernel@lists.infradead.org
Subject: arch: arm: bpf: Converting cBPF to eBPF for arm 32 bit
Date: Thu, 30 Mar 2017 19:34:16 +0530 [thread overview]
Message-ID: <CAHgaXdKfbob3WHMho32JSh_dmfp2A=cjcePqk+NfajVpShPE6Q@mail.gmail.com> (raw)
In-Reply-To: <58DAF908.8010404@iogearbox.net>
Thanks Daniel.
Can you tell me how to test the eBPF JIT compiler? It would be great
if you could tell me starting from compiling to proper testing.
Best,
Shubham Bansal
On Wed, Mar 29, 2017 at 5:30 AM, Daniel Borkmann <daniel@iogearbox.net> wrote:
> Hi Shubham,
>
> On 03/28/2017 10:49 PM, Shubham Bansal wrote:
> [...]
>>
>> 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.
>
>
> Sure, it's in __bpf_prog_run(), see the JMP_TAIL_CALL (kernel/bpf/core.c
> +1019).
> That's effectively what JITs implement. [1] page 3 has a high-level
> description
> as well, hope that helps.
>
> Thanks,
> Daniel
>
> [1]
> http://www.netdevconf.org/1.1/proceedings/papers/On-getting-tc-classifier-fully-programmable-with-cls-bpf.pdf
WARNING: multiple messages have this Message-ID (diff)
From: Shubham Bansal <illusionist.neo@gmail.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Miller <davem@davemloft.net>,
Kees Cook <keescook@chromium.org>,
Mircea Gherzan <mgherzan@gmail.com>,
Network Development <netdev@vger.kernel.org>,
kernel-hardening@lists.openwall.com,
linux-arm-kernel@lists.infradead.org, ast@fb.com
Subject: [kernel-hardening] Re: arch: arm: bpf: Converting cBPF to eBPF for arm 32 bit
Date: Thu, 30 Mar 2017 19:34:16 +0530 [thread overview]
Message-ID: <CAHgaXdKfbob3WHMho32JSh_dmfp2A=cjcePqk+NfajVpShPE6Q@mail.gmail.com> (raw)
In-Reply-To: <58DAF908.8010404@iogearbox.net>
Thanks Daniel.
Can you tell me how to test the eBPF JIT compiler? It would be great
if you could tell me starting from compiling to proper testing.
Best,
Shubham Bansal
On Wed, Mar 29, 2017 at 5:30 AM, Daniel Borkmann <daniel@iogearbox.net> wrote:
> Hi Shubham,
>
> On 03/28/2017 10:49 PM, Shubham Bansal wrote:
> [...]
>>
>> 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.
>
>
> Sure, it's in __bpf_prog_run(), see the JMP_TAIL_CALL (kernel/bpf/core.c
> +1019).
> That's effectively what JITs implement. [1] page 3 has a high-level
> description
> as well, hope that helps.
>
> Thanks,
> Daniel
>
> [1]
> http://www.netdevconf.org/1.1/proceedings/papers/On-getting-tc-classifier-fully-programmable-with-cls-bpf.pdf
next prev parent reply other threads:[~2017-03-30 14:04 UTC|newest]
Thread overview: 105+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-30 10:38 arch: arm: bpf: Converting cBPF to eBPF for arm 32 bit Shubham Bansal
2017-01-30 10:38 ` [kernel-hardening] " Shubham Bansal
2017-01-30 10:38 ` Shubham Bansal
2017-01-30 21:57 ` Kees Cook
2017-01-30 21:57 ` [kernel-hardening] " Kees Cook
2017-01-30 21:57 ` Kees Cook
[not found] ` <CAHgaXd+nj69n-Xf46N=4M-j-0hKHVrrLfsvRZCG=2CCAtVF6ZA@mail.gmail.com>
[not found] ` <CAGXu5j+NSLomuSgD40kys+pWc+J9aB6Bbk_gSP9Lp_ScimQn_w@mail.gmail.com>
2017-02-01 13:01 ` Shubham Bansal
2017-02-01 13:01 ` [kernel-hardening] " Shubham Bansal
2017-02-01 13:01 ` Shubham Bansal
2017-02-01 13:06 ` Fwd: " Shubham Bansal
2017-02-01 13:06 ` [kernel-hardening] " Shubham Bansal
2017-02-06 11:52 ` Shubham Bansal
2017-02-06 11:52 ` [kernel-hardening] " Shubham Bansal
[not found] ` <76621BFF-B30B-4417-AB2B-DB21CA6092D9@netronome.com>
2017-02-03 7:04 ` Shubham Bansal
2017-02-03 7:04 ` [kernel-hardening] " Shubham Bansal
2017-02-03 7:04 ` Shubham Bansal
2017-02-03 8:25 ` nick viljoen
2017-02-03 8:25 ` [kernel-hardening] " nick viljoen
2017-02-03 8:25 ` nick viljoen
2017-02-08 7:29 ` Shubham Bansal
2017-02-08 7:29 ` [kernel-hardening] " Shubham Bansal
2017-02-08 7:29 ` Shubham Bansal
2017-02-08 19:41 ` Kees Cook
2017-02-08 19:41 ` [kernel-hardening] " Kees Cook
2017-02-08 19:41 ` Kees Cook
2017-03-15 12:13 ` Shubham Bansal
2017-03-15 12:13 ` [kernel-hardening] " Shubham Bansal
2017-03-15 12:13 ` Shubham Bansal
2017-03-15 21:55 ` David Miller
2017-03-15 21:55 ` [kernel-hardening] " David Miller
2017-03-15 21:55 ` David Miller
2017-03-28 20:49 ` Shubham Bansal
2017-03-28 20:49 ` [kernel-hardening] " Shubham Bansal
2017-03-28 20:49 ` Shubham Bansal
2017-03-29 0:00 ` Daniel Borkmann
2017-03-29 0:00 ` [kernel-hardening] " Daniel Borkmann
2017-03-29 0:00 ` Daniel Borkmann
2017-03-30 14:04 ` Shubham Bansal [this message]
2017-03-30 14:04 ` [kernel-hardening] " Shubham Bansal
2017-03-30 14:04 ` Shubham Bansal
2017-04-06 11:05 ` Shubham Bansal
2017-04-06 11:05 ` [kernel-hardening] " Shubham Bansal
2017-04-06 11:05 ` Shubham Bansal
2017-04-06 12:51 ` Daniel Borkmann
2017-04-06 12:51 ` [kernel-hardening] " Daniel Borkmann
2017-04-06 12:51 ` Daniel Borkmann
2017-05-06 16:48 ` Shubham Bansal
2017-05-06 16:48 ` [kernel-hardening] " Shubham Bansal
2017-05-06 16:48 ` Shubham Bansal
2017-05-06 18:38 ` David Miller
2017-05-06 18:38 ` [kernel-hardening] " David Miller
2017-05-06 18:38 ` David Miller
2017-05-06 20:27 ` Shubham Bansal
2017-05-06 20:27 ` [kernel-hardening] " Shubham Bansal
2017-05-06 20:27 ` Shubham Bansal
2017-05-06 22:17 ` Shubham Bansal
2017-05-06 22:17 ` [kernel-hardening] " Shubham Bansal
2017-05-06 22:17 ` Shubham Bansal
2017-05-09 20:12 ` Shubham Bansal
2017-05-09 20:12 ` [kernel-hardening] " Shubham Bansal
2017-05-09 20:12 ` Shubham Bansal
2017-05-09 20:19 ` David Miller
2017-05-09 20:19 ` [kernel-hardening] " David Miller
2017-05-09 20:19 ` David Miller
2017-05-09 20:25 ` Daniel Borkmann
2017-05-09 20:25 ` [kernel-hardening] " Daniel Borkmann
2017-05-09 20:25 ` Daniel Borkmann
[not found] <CAHgaXdKsO2xoKYp7g91g+n+d_1KHSSByLjzBB-WjVXSjhB7qxw@mail.gmail.com>
[not found] ` <20170510.212952.1440495072777358778.davem@davemloft.net>
[not found] ` <CAHgaXdK8LEEUPm4jTRRzCnjwdWAauHmmB=caZsSFY8MmStH89Q@mail.gmail.com>
[not found] ` <20170510.215218.2185526627014393313.davem@davemloft.net>
[not found] ` <CAHgaXdKZ_v+iO7uqEDx7PA7D+xcp1FngGvJ1SRSsGXNQ-iWWDQ@mail.gmail.com>
2017-05-11 9:32 ` Shubham Bansal
2017-05-11 9:32 ` Shubham Bansal
2017-05-11 15:30 ` Kees Cook
2017-05-11 15:30 ` Kees Cook
2017-05-13 21:38 ` Shubham Bansal
2017-05-13 21:38 ` Shubham Bansal
2017-05-15 17:44 ` Kees Cook
2017-05-15 17:44 ` Kees Cook
2017-05-15 19:55 ` Daniel Borkmann
2017-05-15 19:55 ` Daniel Borkmann
2017-05-20 20:01 ` Shubham Bansal
2017-05-20 20:01 ` Shubham Bansal
2017-05-22 13:01 ` Daniel Borkmann
2017-05-22 13:01 ` Daniel Borkmann
2017-05-22 17:04 ` Shubham Bansal
2017-05-22 17:04 ` Shubham Bansal
2017-05-22 20:05 ` Kees Cook
2017-05-22 20:05 ` Kees Cook
2017-05-23 2:58 ` Shubham Bansal
2017-05-23 2:58 ` Shubham Bansal
2017-05-23 4:27 ` Kees Cook
2017-05-23 4:27 ` Kees Cook
2017-05-22 18:58 ` Kees Cook
2017-05-22 18:58 ` Kees Cook
2017-05-22 19:08 ` Florian Fainelli
2017-05-22 19:08 ` Florian Fainelli
2017-05-23 3:34 ` Shubham Bansal
2017-05-23 3:34 ` Shubham Bansal
2017-05-23 4:22 ` Kees Cook
2017-05-23 4:22 ` Kees Cook
2017-05-23 5:03 ` Shubham Bansal
2017-05-23 5:03 ` Shubham Bansal
2017-05-23 5:35 ` Kees Cook
2017-05-23 5:35 ` Kees Cook
2017-05-23 18:39 ` Shubham Bansal
2017-05-23 19:32 ` Kees Cook
2017-05-23 19:32 ` Kees Cook
-- strict thread matches above, loose matches on Subject: below --
2017-01-30 10:16 Shubham Bansal
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