From: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
To: Luis Machado <luis.machado@arm.com>
Cc: "Willgerodt, Felix" <felix.willgerodt@intel.com>,
"gdb-patches@sourceware.org" <gdb-patches@sourceware.org>
Subject: Re: [PATCH v3 0/8] gdbserver improvements for AArch64 SVE support
Date: Tue, 07 May 2024 13:34:01 -0300 [thread overview]
Message-ID: <8734qth98m.fsf@linaro.org> (raw)
In-Reply-To: <4d5ffba6-4f8c-418d-ad29-67b5b95c7bd9@arm.com> (Luis Machado's message of "Tue, 7 May 2024 15:43:55 +0100")
Hello Felix, Hello Luis,
Luis Machado <luis.machado@arm.com> writes:
> Hi,
>
> On 5/7/24 15:29, Willgerodt, Felix wrote:
>>> -----Original Message-----
>>> From: Gdb-patches <gdb-patches-
>>> bounces+felix.willgerodt=intel.com@sourceware.org> On Behalf Of Thiago Jung
>>> Bauermann via Gdb-patches
>>>
>>> This is version 3 of the patch series adding support to gdbserver for
>>> inferiors that change the SVE vector length at runtime. This is already
>>> supported by GDB, but not by gdbserver. Version 2 was posted here:
>>
>> I wonder what happened to this series. Do you plan to revive it at some
>> point? I realise this isn't an easy series to land. Tough it would be great
>> to have in my view.
>
> I think it is an essential piece to make gdbserver work correctly for both
> SVE and SME (and similar features on other architectures), as well as enabling
> remote debugging stubs to support vector size changes mid-execution.
>
> Thiago was the last one to touch this code, so he may have better information on
> future plans.
>
> Unfortunately I don't have cycles to get back to this particular feature at the
> moment, but I'd gladly review future iterations of the series.
Thank you for your interest in this series! I think it's very important
too, and it nags me that I haven't been able to finish it yet. I gave up
on the approach from this patch series, which was to have a different
target description for each register size, which implies a different
target description for each inferior thread.
I have a branch where I implemented support in the XML target
description to specify a register whose size is given by a math
expression involving other registers. This way, a single target
description is enough for the whole duration of the inferior execution,
and for all inferior threads. But it still has significant bugs, and
only occasionally I have been able to get back to it and try to move it
forward. I pushed what I have to the sve-tdesc-dynamic-size branch at
this repo, if you would like to have a look:
https://git.linaro.org/people/thiago.bauermann/binutils-gdb.git
If you "git diff 1bdabb9e9fe8..<remote>/sve-tdesc-dynamic-size" you can
see the code.
I think I will be able to work on it again in a month or two. If you
think my approach is good and the branch is a good starting point for
you, feel free to work on it. I'd be happy to collaborate.
--
Thiago
next prev parent reply other threads:[~2024-05-07 16:34 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-30 4:45 Thiago Jung Bauermann
2023-01-30 4:45 ` [PATCH v3 1/8] gdbserver: Add assert in find_register_by_number Thiago Jung Bauermann
2023-01-31 17:05 ` Simon Marchi
2023-01-31 19:49 ` Thiago Jung Bauermann
2023-02-01 15:43 ` Simon Marchi
2023-01-30 4:45 ` [PATCH v3 2/8] gdbserver: Add PID parameter to linux_get_auxv and linux_get_hwcap Thiago Jung Bauermann
2023-02-01 9:07 ` Luis Machado
2023-02-01 10:54 ` Andrew Burgess
2023-02-01 16:01 ` Simon Marchi
2023-02-01 19:33 ` Thiago Jung Bauermann
2023-02-01 19:53 ` Simon Marchi
2023-02-01 21:55 ` Thiago Jung Bauermann
2023-02-06 19:54 ` Pedro Alves
2023-02-06 20:16 ` Simon Marchi
2023-02-07 15:19 ` Pedro Alves
2023-02-07 21:47 ` Thiago Jung Bauermann
2023-02-09 1:31 ` Simon Marchi
2023-02-10 3:54 ` Thiago Jung Bauermann
2023-02-07 22:28 ` Thiago Jung Bauermann
2023-01-30 4:45 ` [PATCH v3 3/8] gdbserver/linux-aarch64: Factor out function to get aarch64_features Thiago Jung Bauermann
2023-02-01 8:59 ` Luis Machado
2023-02-01 16:04 ` Simon Marchi
2023-02-01 22:13 ` Thiago Jung Bauermann
2023-01-30 4:45 ` [PATCH v3 4/8] gdbserver/linux-aarch64: When thread stops, update its target description Thiago Jung Bauermann
2023-02-01 9:05 ` Luis Machado
2023-02-01 11:06 ` Andrew Burgess
2023-02-01 16:21 ` Simon Marchi
2023-02-01 16:32 ` Luis Machado
2023-02-02 2:54 ` Thiago Jung Bauermann
2023-02-02 3:47 ` Simon Marchi
2023-02-03 3:47 ` Thiago Jung Bauermann
2023-02-03 11:13 ` Luis Machado
2023-02-04 15:26 ` Thiago Jung Bauermann
2023-02-03 11:11 ` Luis Machado
2023-02-04 15:21 ` Thiago Jung Bauermann
2023-02-06 9:07 ` Luis Machado
2023-02-06 12:15 ` Thiago Jung Bauermann
2023-02-06 20:29 ` Pedro Alves
2023-02-07 8:11 ` Luis Machado
2023-02-07 14:39 ` Thiago Jung Bauermann
2023-02-03 10:57 ` Luis Machado
2023-02-04 6:18 ` Thiago Jung Bauermann
2023-02-06 20:26 ` Pedro Alves
2023-02-07 21:06 ` Thiago Jung Bauermann
2023-02-09 2:46 ` Simon Marchi
2023-02-10 3:29 ` Thiago Jung Bauermann
2023-02-10 14:56 ` Luis Machado
2023-02-10 15:04 ` Tom Tromey
2023-02-10 15:28 ` Luis Machado
2023-02-10 17:26 ` Thiago Jung Bauermann
2023-02-10 21:01 ` Simon Marchi
2023-01-30 4:45 ` [PATCH v3 5/8] gdbserver: Transmit target description ID in thread list and stop reply Thiago Jung Bauermann
2023-01-30 12:52 ` Eli Zaretskii
2023-01-30 14:05 ` Thiago Jung Bauermann
2023-02-01 9:39 ` Luis Machado
2023-02-01 12:07 ` Andrew Burgess
2023-02-01 13:03 ` Eli Zaretskii
2023-02-01 17:37 ` Simon Marchi
2023-02-02 20:36 ` Thiago Jung Bauermann
2023-02-02 20:56 ` Simon Marchi
2023-02-01 20:46 ` Simon Marchi
2023-02-02 21:43 ` Thiago Jung Bauermann
2023-02-01 14:51 ` Andrew Burgess
2023-02-01 17:03 ` Simon Marchi
2023-02-02 19:52 ` Thiago Jung Bauermann
2023-02-02 20:51 ` Simon Marchi
2023-02-03 2:44 ` Thiago Jung Bauermann
2023-02-03 16:29 ` Andrew Burgess
2023-02-04 6:08 ` Thiago Jung Bauermann
2023-02-03 11:22 ` Luis Machado
2023-02-03 12:50 ` Simon Marchi
2023-01-30 4:45 ` [PATCH v3 6/8] gdb/remote: Parse tdesc field in stop reply and threads list XML Thiago Jung Bauermann
2023-02-01 9:52 ` Luis Machado
2023-02-05 0:06 ` Thiago Jung Bauermann
2023-02-06 9:10 ` Luis Machado
2023-02-01 14:32 ` Andrew Burgess
2023-02-01 19:50 ` Simon Marchi
2023-02-01 20:16 ` Simon Marchi
2023-02-03 11:27 ` Luis Machado
2023-02-03 13:19 ` Simon Marchi
2023-02-03 16:33 ` Andrew Burgess
2023-01-30 4:45 ` [PATCH v3 7/8] gdb/aarch64: Detect vector length changes when debugging remotely Thiago Jung Bauermann
2023-02-01 9:58 ` Luis Machado
2023-02-01 15:26 ` Andrew Burgess
2023-02-01 20:20 ` Simon Marchi
2023-02-03 11:31 ` Luis Machado
2023-02-03 16:38 ` Andrew Burgess
2023-02-03 19:07 ` Simon Marchi
2023-01-30 4:45 ` [PATCH v3 8/8] gdb/testsuite: Add test to exercise multi-threaded AArch64 SVE inferiors Thiago Jung Bauermann
2023-02-01 10:10 ` Luis Machado
2023-02-06 19:11 ` [PATCH v3 0/8] gdbserver improvements for AArch64 SVE support Pedro Alves
2023-02-06 20:05 ` Simon Marchi
2023-02-06 21:06 ` Pedro Alves
2023-02-07 13:49 ` Simon Marchi
2024-05-07 14:29 ` Willgerodt, Felix
2024-05-07 14:43 ` Luis Machado
2024-05-07 16:34 ` Thiago Jung Bauermann [this message]
2024-05-10 13:47 ` Willgerodt, Felix
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