set architecture for MPC8xx

set architecture for MPC8xx

[Schneider, Jan (GE51)]

Hello,

I have tried the "set architecture" command for the powerpc MPC8xx. After
this I see a lot of new registers.
But for me it seems that these registers aren't really taking effects after
changing their values.
I found them in rs6000-tdep.c.

Is there a way to use these additional registers sensible?

thanks

Re: set architecture for MPC8xx

[Steven Johnson]

Your target stub needs to support the "Architecture" otherwise it wont 
know how to set or get the values of the registers.

If the target stub only reports/handles registers for the "generic" 
architecture, you will need to change it to handle all of the other 
registers.

Steven

Schneider, Jan (GE51) wrote:

>Hello,
>
>I have tried the "set architecture" command for the powerpc MPC8xx. After
>this I see a lot of new registers.
>But for me it seems that these registers aren't really taking effects after
>changing their values.
>I found them in rs6000-tdep.c.
>
>Is there a way to use these additional registers sensible?
>
>thanks
>
>
>  
>

Re: set architecture for MPC8xx

[Fabian Cenedese]

>>I have tried the "set architecture" command for the powerpc MPC8xx. After
>>this I see a lot of new registers.
>>But for me it seems that these registers aren't really taking effects after
>>changing their values.
>>I found them in rs6000-tdep.c.
>>
>>Is there a way to use these additional registers sensible?
>
>Your target stub needs to support the "Architecture" otherwise it wont know how to set or get the values of the registers.
>
>If the target stub only reports/handles registers for the "generic" architecture, you will need to change it to handle all of the other registers.

Is there a way to tell the stub the architecture gdb was set to? (Other
than with the monitor command.)

Thanks

bye  Fabi

Re: set architecture for MPC8xx

[Steven Johnson]

Fabian Cenedese wrote:

>Is there a way to tell the stub the architecture gdb was set to? (Other
>than with the monitor command.)
>  
>
That would be nice, but unfortunaltey not to my knowledge.  The stub I 
wrote for MPC860, only worked with that architecture, and didnt work 
with the generic powerpc architecture.  It saved me switching, when I 
never used anything but the MPC8XX Architecture with the stub.

The counter would be nice, for the stub to tell GDB what architecture/s 
it actually supports, so GDB takes on the appropriate view.  But also, 
stubs cant do this either.

Hope this answers the question.

Steven

Re: set architecture for MPC8xx

[Andrew Cagney]

Steven Johnson wrote:
> Fabian Cenedese wrote:
> 
>> Is there a way to tell the stub the architecture gdb was set to? (Other
>> than with the monitor command.)
>>  
>>
> That would be nice, but unfortunaltey not to my knowledge.  The stub I 
> wrote for MPC860, only worked with that architecture, and didnt work 
> with the generic powerpc architecture.  It saved me switching, when I 
> never used anything but the MPC8XX Architecture with the stub.
> 
> The counter would be nice, for the stub to tell GDB what architecture/s 
> it actually supports, so GDB takes on the appropriate view.

Yes.

Perhaphs a T packet extension?
http://sources.redhat.com/gdb/papers/multi-arch/real-multi-arch/index.html#SEC43

Andrew


> But also, 
> stubs cant do this either.
> 
> Hope this answers the question.
> 
> Steven
> 

Re: set architecture for MPC8xx

[Steven Johnson]

Schneider, Jan (GE51) wrote:

>ok.
>I thought I only need such stub for remote debugging.
>Where can I found this stub?
>or do I have to implement one?
>
>Jan
>
>  
>
Sorry,

I assumed (obviously incorrectly) you were remote debugging.  I dont 
know anything about how architectures work if you use a simulator, or 
for hosted local debugging.

Steven

RE: set architecture for MPC8xx

[Schneider, Jan (GE51)]

ok.
I thought I only need such stub for remote debugging.
Where can I found this stub?
or do I have to implement one?

Jan

-----Original Message-----
From: Steven Johnson [mailto:sjohnson@neurizon.net]
Sent: Wednesday, November 10, 2004 11:12 PM
To: Schneider, Jan (GE51)
Cc: 'gdb@sources.redhat.com'
Subject: Re: set architecture for MPC8xx


Your target stub needs to support the "Architecture" otherwise it wont 
know how to set or get the values of the registers.

If the target stub only reports/handles registers for the "generic" 
architecture, you will need to change it to handle all of the other 
registers.

Steven

Schneider, Jan (GE51) wrote:

>Hello,
>
>I have tried the "set architecture" command for the powerpc MPC8xx. After
>this I see a lot of new registers.
>But for me it seems that these registers aren't really taking effects after
>changing their values.
>I found them in rs6000-tdep.c.
>
>Is there a way to use these additional registers sensible?
>
>thanks
>
>
>  
>