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Message-ID: <64da0019-4816-a409-be93-b1cf7021c584@huawei.com>
Date:   Tue, 19 Jul 2022 16:24:42 +0100
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Subject: Re: faddr2line issue
To:     Josh Poimboeuf <jpoimboe@kernel.org>
CC:     <keescook@chromium.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
References: <09df26a9-27af-1276-34c6-820bf7e27da8@huawei.com>
 <3492d341-a681-f344-f5cd-5b1ea3725f31@huawei.com>
 <20220714164136.n2ycc5axt7vtctgs@treble>
From:   John Garry <john.garry@huawei.com>
In-Reply-To: <20220714164136.n2ycc5axt7vtctgs@treble>
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On 14/07/2022 17:41, Josh Poimboeuf wrote:
> On Thu, Jul 14, 2022 at 10:57:51AM +0100, John Garry wrote:
>> On 08/07/2022 15:47, John Garry wrote:
>>
>> +
>>
>> JFYI, This issue is caused by CONFIG_DEBUG_INFO now being default off in my
>> .config from commit f9b3cd245784 ("Kconfig.debug: make DEBUG_INFO selectable
>> from a choice").
>>
>> By enabling that config faddr2line now looks ok again.
>>
>> BTW, Could we add a check for any kernel dependency in this tool?
> Hi John,
> 
> The script doesn't know how to reliably find the .config file, but it
> should be able to check for missing DWARF in the binary itself.

Hi Josh,

So adding config DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT to v5.19-rc2 got it 
working again for me on arm64. However commit dcea997beed6 ("faddr2line: 
Fix overlapping text section failures, the sequel") seems to be broken 
for me, below - this first appeared in rc3. Any idea what the issue 
could be?

$./faddr.sh hisi_sas_sata_done+0x8/0x38
hisi_sas_sata_done+0x8/0x38:
fs mm ??:0

Thanks,
John