[ECOS] Exceptions and interrupts

[ECOS] Exceptions and interrupts

[Enrico Piria]

Hello.
When an exception is triggered (especially the one that brings the GDB stub),
should all interrupts be disabled?

Other two more generic questions are:

1) May GDB debugging be done on a single thread,
with other threads and interrupts enabled?

2) May GDB debugging be done on ISRs?

Thank you

Enrico Piria



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[ECOS] Etherboot

[Gonçalo Antunes]

Hi!

Is it possible to put an eCos application to load via Etherboot 
(www.etherboot.org) ?
I want to build an Etherboot floppy disk and boot it so it can access the 
dhcp server and retrieve the eCos application image and run it.
Which flags do I have to enable on eCos config?
- CYG_HAL_STARTUP = RAM ?
What is the image format to do this (bin, elf) ?

Thank you very much.

Gonçalo Antunes.



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Re: [ECOS] Exceptions and interrupts

[Gary Thomas]

On Mon, 2005-05-23 at 11:53 +0200, Enrico Piria wrote:
> Hello.
> When an exception is triggered (especially the one that brings the GDB stub),
> should all interrupts be disabled?

Yes

> 
> Other two more generic questions are:
> 
> 1) May GDB debugging be done on a single thread,
> with other threads and interrupts enabled?
> 

This is not currently supported

> 2) May GDB debugging be done on ISRs?
> 

Yes

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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[ECOS] Simulators

[Andrew Armstrong]

I would like to run Ecos on PC within a simulator. I have 'Virtual PC' but I
haven't managed to get redboot to work with my Network Adapters (Broadcom
570x Gigabit or Intel Pro/Wireless LAN 2100) and I don't want to fork out
for VMWare. Does anybody have suggestions of what to use?

Any help much appreciated

Regards

Andrew


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Re: [ECOS] Simulators

[Gary Thomas]

On Mon, 2005-05-23 at 13:51 +0100, Andrew Armstrong wrote:
> I would like to run Ecos on PC within a simulator. I have 'Virtual PC' but I
> haven't managed to get redboot to work with my Network Adapters (Broadcom
> 570x Gigabit or Intel Pro/Wireless LAN 2100) and I don't want to fork out
> for VMWare. Does anybody have suggestions of what to use?

You could try Qemu - I've not tried eCos on it, but it can load and run
most any PC version of Linux, so it should work fine.
  http://fabrice.bellard.free.fr/qemu/

Also, why not just use the "synthetic" target?  This is an eCos target
which runs within a normal Linux task.  For details:
  http://ecos.sourceware.org/docs-latest/ref/hal-synth-arch.html

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MLB Associates              |    Embedded world
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RE: [ECOS] Simulators

[Andrew Armstrong]

Thanks Gary, I look into both those options.

Andrew 

-----Original Message-----
From: Gary Thomas [mailto:gary@mlbassoc.com] 
Sent: 23 May 2005 14:05
To: Andrew Armstrong
Cc: eCos Discussion
Subject: Re: [ECOS] Simulators

On Mon, 2005-05-23 at 13:51 +0100, Andrew Armstrong wrote:
> I would like to run Ecos on PC within a simulator. I have 'Virtual PC' 
> but I haven't managed to get redboot to work with my Network Adapters 
> (Broadcom 570x Gigabit or Intel Pro/Wireless LAN 2100) and I don't 
> want to fork out for VMWare. Does anybody have suggestions of what to use?

You could try Qemu - I've not tried eCos on it, but it can load and run most
any PC version of Linux, so it should work fine.
  http://fabrice.bellard.free.fr/qemu/

Also, why not just use the "synthetic" target?  This is an eCos target which
runs within a normal Linux task.  For details:
  http://ecos.sourceware.org/docs-latest/ref/hal-synth-arch.html

--
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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[ECOS] Re: Simulators

[Jani Monoses]

> You could try Qemu - I've not tried eCos on it, but it can load and run
> most any PC version of Linux, so it should work fine.
>   http://fabrice.bellard.free.fr/qemu/

One caveat, at least with pre 0.7 versions. If you use a floppy_startup image to boot qemu 
from, make sure it is padded out to 512 bytes otherwise it may not work, as qemu will 
ignore tha last incomplete sector. Alternatively use cdrom or hd images.

Jani


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Re: [ECOS] Re: Simulators

[Gary Thomas]

On Mon, 2005-05-23 at 16:21 +0300, Jani Monoses wrote:
> > You could try Qemu - I've not tried eCos on it, but it can load and run
> > most any PC version of Linux, so it should work fine.
> >   http://fabrice.bellard.free.fr/qemu/
> 
> One caveat, at least with pre 0.7 versions. If you use a floppy_startup image to boot qemu 
> from, make sure it is padded out to 512 bytes otherwise it may not work, as qemu will 
> ignore tha last incomplete sector. Alternatively use cdrom or hd images.

I've had much better luck running the version from CVS, at
least on some other issues (I don't know if the floppy bug is
fixed in CVS)

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------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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