linux-ext4 - Re: [sparc64] sigbus in e2fsck

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Message-ID: <CADxRZqx1QQNPXyzw7qXKPGH40yA9UsvZPYHaW0=i=z_tAix2Aw@mail.gmail.com>
Date:   Tue, 30 Aug 2016 23:17:07 +0300
From:   Anatoly Pugachev <matorola@...il.com>
To:     "Theodore Ts'o" <tytso@....edu>
Cc:     linux-ext4@...r.kernel.org,
        debian-sparc <debian-sparc@...ts.debian.org>
Subject: Re: [sparc64] sigbus in e2fsck

On Tue, Aug 30, 2016 at 10:16 PM, Theodore Ts'o <tytso@....edu> wrote:
> On Tue, Aug 30, 2016 at 06:12:39PM +0300, Anatoly Pugachev wrote:
>>
>> (gdb) p bh->b_data
>> $1 = "\300;9\230\000\000\000\005\000\000\253\204\000\000\000\070\000\000\000\000\000\000$\022\000\000\000\000\000\000$<\000\000\000\000\000\000$\270\000\000\000\000\000\000$]\000\000\000\000\000\000$\024",
>> '\000' <repeats 967 times>
>> (gdb) p offset
>> $2 = 16
>> (gdb) p *bh->b_data
>> $3 = -64 '\300'
>> (gdb) p *(bh->b_data+offset)
>> $6 = 0 '\000'
>
> Can you give us "p &bh->b_data" (so we can get the starting address of
> b_data to make sure it's aligned) and "p offset" (so we can check and
> make sure offset is sane)?

(gdb) p &bh->b_data
$7 = (char (*)[1024]) 0x2e9b9c
(gdb) p offset
$8 = 16
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