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AW: several remote gdb questions/problems
- From: "Neundorf, Alexander" <Alexander dot Neundorf at jenoptik dot com>
- To: <ecos-discuss at sources dot redhat dot com>
- Date: Tue, 10 Aug 2004 08:11:22 +0200
- Subject: AW: [ECOS] several remote gdb questions/problems
Hi,
maybe some people are interested or have the same issues, so I post my findings here so that they end up in the archives:
> Two (maybe three) issues:
> It seems I am not able to pause a running program.
> ecos/packages/hal/arm/xscale/pxa2x0/hal_diag.c contains code
> which seems to check for ctrl-c . But pressing ctrl-c in
> arm-elf-gdb doesn't break the program :-/
> Redboot is configured as rom-monitor, with gdb_break_support
> (not ctrl-c support), since the stubs are present in redboot.
> The app is configured without stubs, and checking
> gdb_break_support or ctrlc_support doesn't change the behaviour.
> Any hints why it doesn't work or how to find out the reason ?
Ok, I opened /dev/ttydiag in my app and this seems to have the effect that the break events don't get through. So I added manually the check for ctrl-c (0x03) when reading from /dev/ttydiag and call cyg_hal_user_break() when this happens. Seems to work perfectly :-)
> Next one: I know this question was posted here several times
> already, but I didn't find a definitive answer. I have (only)
> one serial port, which I use for diag_printf(). On the xscale
> I read characters from /dev/ttydiag and interpret the commands.
> gdb runs over the same serial line.
> Is it possible to use gdb and at the same time see the
> diag_printf() output and be able to enter some commands via
> the serial line so that they reach my interpreter on the xscale ?
Adding a "write-only" mode to cutecom (http://cutecom.sf.net) solved the problem for me :-). Now I can debug with gdb and enter commands through cutecom.
Isn't there a way to send commands directly thgough gdb to the device ?
> (third one: are there known problems with adding global
> object instances to the watch window with insight 6.1 ? When
> I try this, insight stalls and I have to kill it).
Well, the object was too big (several megabytes, I should have thought about this before), it works with smaller objects.
Bye
Alex
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