From: "Rémi Bernon" <rbernon@codeweavers.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] perf symbol: Look for ImageBase in PE file to compute .text offset
Date: Sun, 12 Sep 2021 10:25:26 +0200 [thread overview]
Message-ID: <e8ae2882-12cd-0fe1-b5e6-da9fc286b821@codeweavers.com> (raw)
In-Reply-To: <YTpuTiYzkTKbUM/l@kernel.org>
On 9/9/21 10:27 PM, Arnaldo Carvalho de Melo wrote:
> Em Thu, Sep 09, 2021 at 09:26:36PM +0200, Remi Bernon escreveu:
>> Instead of using the file offset in the debug file.
>>
>> This fixes a regression from 00a3423492bc90be99e529a64f13fdd80a0e8c0a,
>> causing incorrect symbol resolution when debug file have been stripped
>> from non-debug sections (in which case its .text section is empty and
>> doesn't have any file position).
>>
>> The debug files could also be created with a different file alignment,
>> and have different file positions from the mmap-ed binary, or have the
>> section reordered.
>>
>> This instead looks for the file image base, using the corresponding bfd
>> *ABS* symbols. As PE symbols only have 4 bytes, it also needs to keep
>> .text section vma high bits.
>
> I added a:
>
> Fixes: 00a3423492bc90be ("perf symbols: Make dso__load_bfd_symbols() load PE files from debug cache only")
>
> To help stable@kernel.org to pick it, its on my local tree now.
>
> It would be great to get a:
>
> Reviewed-by: Nicholas Fraser <nfraser@codeweavers.com>
>
> Can we have it, please?
>
Well, Nicholas doesn't work with us anymore. I've reached them
separately but didn't get any answer so I'm thinking they may not be
interested.
--
Rémi Bernon <rbernon@codeweavers.com>
next prev parent reply other threads:[~2021-09-12 8:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-09 19:26 [PATCH] perf symbol: Look for ImageBase in PE file to compute .text offset Remi Bernon
2021-09-09 20:27 ` Arnaldo Carvalho de Melo
2021-09-12 8:25 ` Rémi Bernon [this message]
2021-09-13 19:24 ` Arnaldo Carvalho de Melo
2021-09-13 20:37 ` Rémi Bernon
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