alignment errors

alignment errors

[Jaap de Jong]

Hi,

I'm working on a recipe for ptpd2.
When I run it on my armv5te I get traps:

[ 5034.410000] Alignment trap: ptpd2 (523) PC=0x0000e7cc 
Instr=0xe5870004 Address=0x0001d459 FSR 0x801

What is the best way to tackle this?
Do I have to add "__attribute__ ((packed))" on critical places?

Thanks!

Re: alignment errors

[Holger Freyther]

On 11/12/2010 12:25 PM, Jaap de Jong wrote:
> Hi,
> 
> I'm working on a recipe for ptpd2.
> When I run it on my armv5te I get traps:
> 
> [ 5034.410000] Alignment trap: ptpd2 (523) PC=0x0000e7cc Instr=0xe5870004
> Address=0x0001d459 FSR 0x801
> 
> What is the best way to tackle this?
> Do I have to add "__attribute__ ((packed))" on critical places?
>

use addr2line or gdb (if this is inside a library) to get the method/code that
is triggering that and then see what it looks like. In most cases the easiest
way to get around this is to use memcpy or such.

Re: alignment errors

[Khem Raj]

On Fri, Nov 12, 2010 at 3:25 AM, Jaap de Jong <jaap.dejong@nedap.com> wrote:
> Hi,
>
> I'm working on a recipe for ptpd2.
> When I run it on my armv5te I get traps:
>
> [ 5034.410000] Alignment trap: ptpd2 (523) PC=0x0000e7cc Instr=0xe5870004
> Address=0x0001d459 FSR 0x801
>
> What is the best way to tackle this?
> Do I have to add "__attribute__ ((packed))" on critical places?
>

avoid them they are inefficient and will paper over the real problem.
As Holger suggest
take gdb help to debug the problem and then fix it accordingly.

> Thanks!
>
>
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