linux-kernel - Re: [Xen-devel] incorrect layout of globals from head

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Message-Id: <4FF6FCA9020000780008E0BB@nat28.tlf.novell.com>
Date:	Fri, 06 Jul 2012 13:56:41 +0100
From:	"Jan Beulich" <JBeulich@...e.com>
To:	"Olaf Hering" <olaf@...fle.de>,
	"Daniel Kiper" <dkiper@...-space.pl>
Cc:	<kexec@...ts.infradead.org>, <xen-devel@...ts.xensource.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] incorrect layout of globals from head_64.S
 during kexec boot

>>> On 06.07.12 at 14:07, Olaf Hering <olaf@...fle.de> wrote:
> But adding some debug to inspect
> *output in parse_elf() shows that the second entry in program headers is
> already shifted by 44 bytes in my testing, the others are shifted by the
> same amount.

Unfortunately it's not clear what is shifted - the printout below
looks just fine. Also, from your first mail I understood that the shift
there was by an amount not divisible by 4 - does that amount vary?

> Program Headers:
>   Type           Offset   VirtAddr           PhysAddr           FileSiz  
> MemSiz   Flg Align
>   LOAD           0x200000 0xffffffff81000000 0x0000000001000000 0xa3b000 
> 0xa3b000 R E 0x200000
>   LOAD           0xe00000 0xffffffff81c00000 0x0000000001c00000 0x05b0e8 
> 0x05b0e8 RW  0x200000
>   LOAD           0x1000000 0x0000000000000000 0x0000000001c5c000 0x012c40 
> 0x012c40 RW  0x200000
>   LOAD           0x106f000 0xffffffff81c6f000 0x0000000001c6f000 0x087000 
> 0x702000 RWE 0x200000
>   NOTE           0x82d5bc 0xffffffff8162d5bc 0x000000000162d5bc 0x00017c 
> 0x00017c     0x4
> 
> 
> That makes me wonder wether kexec-tools is the culprit.

Possibly, though generally any corruption to the compressed image
should make decompression fail I would think.

Jan

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