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Date: Tue, 28 Nov 2000 16:28:48 +0000 (GMT)
From: Tigran Aivazian <tigran@veritas.com>
To: jani@virtualro.ic.ro
cc: linux-kernel@vger.kernel.org
Subject: Re: binfmt question
In-Reply-To: <Pine.LNX.4.10.10011281807140.7206-100000@virtualro.ic.ro>
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On Tue, 28 Nov 2000 jani@virtualro.ic.ro wrote:

> 
> Hi,
> 
> Is every process supposed to have a valid  binary format?
> (binfmt field !=NULL in it's task_struct).I hope so.
> 

No, incorrect. You can have a kernel thread with binfmt == NULL, see

# gdb -q vmlinux /proc/kcore
Core was generated by `auto BOOT_IMAGE=240-test11 ro root=302
BOOT_FILE=/boot/vmlinuz-2.4.0-test11'.
#0  0x0 in ?? ()
(gdb) p ((((2) >> 8) ^ (2)) & (1024 - 1))
$1 = 2
(gdb) p pidhash[2]->comm
$2 = "eventd\000\000\000\000\000\000\000\000\000"
(gdb) p pidhash[2]->binfmt
$3 = (struct linux_binfmt *) 0x0

Regards,
Tigran

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