linux-kernel - Re: [PATCH] scripts/gdb: Handle split debug

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Date:   Wed, 31 Jul 2019 16:24:28 +0200
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Douglas Anderson <dianders@...omium.org>,
        Kieran Bingham <kbingham@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     kgdb-bugreport@...ts.sourceforge.net,
        Jason Wessel <jason.wessel@...driver.com>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scripts/gdb: Handle split debug

On 31.07.19 01:40, Douglas Anderson wrote:
> Some systems (like Chrome OS) may use "split debug" for kernel
> modules.  That means that the debug symbols are in a different file
> than the main elf file.  Let's handle that by also searching for debug
> symbols that end in ".ko.debug".

Is this split-up depending on additional kernel patches, is this already
possible with mainline, or is this purely a packaging topic? Wondering because
of testability in case it's downstream-only.

Jan

> 
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> ---
> 
>  scripts/gdb/linux/symbols.py | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/gdb/linux/symbols.py b/scripts/gdb/linux/symbols.py
> index 2f5b95f09fa0..34e40e96dee2 100644
> --- a/scripts/gdb/linux/symbols.py
> +++ b/scripts/gdb/linux/symbols.py
> @@ -77,12 +77,12 @@ lx-symbols command."""
>              gdb.write("scanning for modules in {0}\n".format(path))
>              for root, dirs, files in os.walk(path):
>                  for name in files:
> -                    if name.endswith(".ko"):
> +                    if name.endswith(".ko") or name.endswith(".ko.debug"):
>                          self.module_files.append(root + "/" + name)
>          self.module_files_updated = True
>  
>      def _get_module_file(self, module_name):
> -        module_pattern = ".*/{0}\.ko$".format(
> +        module_pattern = ".*/{0}\.ko(?:.debug)?$".format(
>              module_name.replace("_", r"[_\-]"))
>          for name in self.module_files:
>              if re.match(module_pattern, name) and os.path.exists(name):
> 

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