From: Florian Weimer <fweimer@redhat.com>
To: Walt Drummond via Gdb <gdb@sourceware.org>
Cc: Tom Tromey <tom@tromey.com>, Walt Drummond <walt@drummond.us>
Subject: Re: AMD64_LINUX_frame_size
Date: Mon, 11 Jan 2021 11:43:05 +0100 [thread overview]
Message-ID: <87sg77pxdy.fsf@oldenburg2.str.redhat.com> (raw)
In-Reply-To: <CADCN6nzB1Sn=8200TfpSSbKgBoGJFc35_PtpFd5vfkg7G1uuyw@mail.gmail.com> (Walt Drummond via Gdb's message of "Thu, 7 Jan 2021 13:49:50 -0800")
* Walt Drummond via Gdb:
> Thanks Tom. My math shows the kernel sizes as
> Redzone 128
> math frame/xstate 840
> rt_sigframe 456
>
> That's a total of 1424 bytes, so maybe GDB is saving less than it should?
With AVX-512, the kernel size is way larger.
Do you know for what purpose GDB needs this information? Decoding the
xstate is quite complicated as far as I know. Is it related to
preserving stack contents across signal delivery?
Thanks,
Florian
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next prev parent reply other threads:[~2021-01-11 10:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-04 18:30 AMD64_LINUX_frame_size Walt Drummond
2021-01-06 16:38 ` AMD64_LINUX_frame_size Walt Drummond
2021-01-07 21:19 ` AMD64_LINUX_frame_size Tom Tromey
2021-01-07 21:49 ` AMD64_LINUX_frame_size Walt Drummond
2021-01-09 20:14 ` AMD64_LINUX_frame_size Tom Tromey
2021-01-11 10:43 ` Florian Weimer [this message]
2021-01-12 16:10 ` AMD64_LINUX_frame_size Walt Drummond
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