linux-kernel - Re: [PATCH] scripts/gdb: use mem instead of core

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Date:   Wed, 12 Apr 2023 13:26:06 +0200
From:   Pankaj Raghav <p.raghav@...sung.com>
To:     <jan.kiszka@...mens.com>, <kbingham@...nel.org>
CC:     <gost.dev@...sung.com>, <linux-kernel@...r.kernel.org>,
        <song@...nel.org>, <mcgrof@...nel.org>
Subject: Re: [PATCH] scripts/gdb: use mem instead of core_layout to get the
 module address

On 2023-04-12 13:15, Pankaj Raghav wrote:
> commit ac3b43283923 ("module: replace module_layout with module_memory")
> changed the struct module data structure from module_layout to
> module_memory. The core_layout member which is used while loading
> modules are not available anymore leading to the following error while
> running gdb:
> 
> (gdb) lx-symbols
> loading vmlinux
> Python Exception <class 'gdb.error'>: There is no member named core_layout.
> Error occurred in Python: There is no member named core_layout.
> 
> Replace core_layout with its new counterpart mem[MOD_TEXT].
> 
> Fixes: ac3b43283923 ("module: replace module_layout with module_memory")
> Signed-off-by: Pankaj Raghav <p.raghav@...sung.com>
> ---

I had one question:
- Is there a way to import enum? I currently hard code 0 but it will better if we can
use the MOD_TEXT enum instead.

>  scripts/gdb/linux/modules.py | 2 +-
>  scripts/gdb/linux/symbols.py | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/gdb/linux/modules.py b/scripts/gdb/linux/modules.py
> index 441b23239896..6ec51e913070 100644
> --- a/scripts/gdb/linux/modules.py
> +++ b/scripts/gdb/linux/modules.py
> @@ -73,7 +73,7 @@ class LxLsmod(gdb.Command):
>                  "        " if utils.get_long_type().sizeof == 8 else ""))
>  
>          for module in module_list():
> -            layout = module['core_layout']
> +            layout = module['mem'][0]
>              gdb.write("{address} {name:<19} {size:>8}  {ref}".format(
>                  address=str(layout['base']).split()[0],
>                  name=module['name'].string(),
> diff --git a/scripts/gdb/linux/symbols.py b/scripts/gdb/linux/symbols.py
> index dc07b6d12e30..3a7976401e00 100644
> --- a/scripts/gdb/linux/symbols.py
> +++ b/scripts/gdb/linux/symbols.py
> @@ -109,7 +109,7 @@ lx-symbols command."""
>  
>      def load_module_symbols(self, module):
>          module_name = module['name'].string()
> -        module_addr = str(module['core_layout']['base']).split()[0]
> +        module_addr = str(module['mem'][0]['base']).split()[0]
>  
>          module_file = self._get_module_file(module_name)
>          if not module_file and not self.module_files_updated: