linux-kernel - Re: [PATCH v2 00/19] Implement DWARF modversions

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Message-ID: <874j7ccxtz.fsf@trenco.lwn.net>
Date: Thu, 22 Aug 2024 10:43:36 -0600
From: Jonathan Corbet <corbet@....net>
To: Sami Tolvanen <samitolvanen@...gle.com>, Masahiro Yamada
 <masahiroy@...nel.org>, Luis Chamberlain <mcgrof@...nel.org>, Miguel Ojeda
 <ojeda@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Matthew Maurer <mmaurer@...gle.com>, Alex Gaynor
 <alex.gaynor@...il.com>, Wedson Almeida Filho <wedsonaf@...il.com>, Gary
 Guo <gary@...yguo.net>, Petr Pavlu <petr.pavlu@...e.com>, Neal Gompa
 <neal@...pa.dev>, Hector Martin <marcan@...can.st>, Janne Grunau
 <j@...nau.net>, Asahi Linux <asahi@...ts.linux.dev>,
 linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-modules@...r.kernel.org, rust-for-linux@...r.kernel.org, Sami
 Tolvanen <samitolvanen@...gle.com>
Subject: Re: [PATCH v2 00/19] Implement DWARF modversions

Sami Tolvanen <samitolvanen@...gle.com> writes:

> The first 16 patches of this series add a small tool for computing
> symbol versions from DWARF, called gendwarfksyms. When passed a
> list of exported symbols and an object file, the tool generates
> an expanded type string for each symbol, and computes symbol CRCs
> similarly to genksyms.

Potentially silly question but: how similarly?  Specifically, do the two
tools generate the same CRCs for the same symbols?  It seems that might
be important for users transitioning to the new DWARF world order.

Thanks,

jon