powerpc gdb and gdbserver

powerpc gdb and gdbserver

[Christopher R. Johnson]

I'm about to go and grab gdb to build a host-based debugger and
target-based (PPC 405GP) gdbserver.  Anybody out there with advice on
how to do this?  Should it just work out of the box or is there stuff I
need to do to gdbserver for this platform?  The sources I just found are
gdb-6.0, and I'm using quite recent tools (gcc 3.3.2 glibc 2.3.2
binutils 2.14.90.0.5 - kudos to Dan Kegle for the crosstools stuff!!!).

Thanks!

--
Christopher R. Johnson
Principal Software Engineer
GCC Printers


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: powerpc gdb and gdbserver

[Daniel Jacobowitz]

On Wed, Dec 17, 2003 at 12:50:51PM -0500, Christopher R. Johnson wrote:
>
> I'm about to go and grab gdb to build a host-based debugger and
> target-based (PPC 405GP) gdbserver.  Anybody out there with advice on
> how to do this?  Should it just work out of the box or is there stuff I
> need to do to gdbserver for this platform?  The sources I just found are
> gdb-6.0, and I'm using quite recent tools (gcc 3.3.2 glibc 2.3.2
> binutils 2.14.90.0.5 - kudos to Dan Kegle for the crosstools stuff!!!).
>
> Thanks!

It should simply build and work.  You build GDB by setting a --target
and gdbserver by setting a --host.  If you don't want to build a native
GDB at the same time, run the --host build by gdbserver/configure
instead of the top-level src/configure.

--
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: powerpc gdb and gdbserver

[Christopher R. Johnson]

Ok that worked pretty well, except that gdbserver wants a library called
libthread_db.so on the target.  From what little I can find this looks
like something I should build from the glibc mess.  Does anyone know
what options I need to add to the glibc build in order to create this
library?

Thanks!

Daniel Jacobowitz wrote:

>On Wed, Dec 17, 2003 at 12:50:51PM -0500, Christopher R. Johnson wrote:
>
>>I'm about to go and grab gdb to build a host-based debugger and
>>target-based (PPC 405GP) gdbserver.  Anybody out there with advice on
>>how to do this?  Should it just work out of the box or is there stuff I
>>need to do to gdbserver for this platform?  The sources I just found are
>>gdb-6.0, and I'm using quite recent tools (gcc 3.3.2 glibc 2.3.2
>>binutils 2.14.90.0.5 - kudos to Dan Kegle for the crosstools stuff!!!).
>>
>>Thanks!
>>
>
>It should simply build and work.  You build GDB by setting a --target
>and gdbserver by setting a --host.  If you don't want to build a native
>GDB at the same time, run the --host build by gdbserver/configure
>instead of the top-level src/configure.
>
>--
>Daniel Jacobowitz
>MontaVista Software                         Debian GNU/Linux Developer
>
>

--
Christopher R. Johnson
Principal Software Engineer
GCC Printers
(781)276-8763


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: powerpc gdb and gdbserver

[Daniel Jacobowitz]

On Thu, Dec 18, 2003 at 03:27:26PM -0500, Christopher R. Johnson wrote:
> Ok that worked pretty well, except that gdbserver wants a library called
> libthread_db.so on the target.  From what little I can find this looks
> like something I should build from the glibc mess.  Does anyone know
> what options I need to add to the glibc build in order to create this
> library?

Just make a symlink to libthread_db.so.1.

>
> Thanks!
>
> Daniel Jacobowitz wrote:
>
> >On Wed, Dec 17, 2003 at 12:50:51PM -0500, Christopher R. Johnson wrote:
> >
> >>I'm about to go and grab gdb to build a host-based debugger and
> >>target-based (PPC 405GP) gdbserver.  Anybody out there with advice on
> >>how to do this?  Should it just work out of the box or is there stuff I
> >>need to do to gdbserver for this platform?  The sources I just found are
> >>gdb-6.0, and I'm using quite recent tools (gcc 3.3.2 glibc 2.3.2
> >>binutils 2.14.90.0.5 - kudos to Dan Kegle for the crosstools stuff!!!).
> >>
> >>Thanks!
> >>
> >
> >It should simply build and work.  You build GDB by setting a --target
> >and gdbserver by setting a --host.  If you don't want to build a native
> >GDB at the same time, run the --host build by gdbserver/configure
> >instead of the top-level src/configure.
> >
> >--
> >Daniel Jacobowitz
> >MontaVista Software                         Debian GNU/Linux Developer
> >
> >
>
> --
> Christopher R. Johnson
> Principal Software Engineer
> GCC Printers
> (781)276-8763
>
>
>
>

--
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: powerpc gdb and gdbserver

[Christopher R. Johnson]

As I mentioned, the library doesn't exist.  I need to build it, but I'm
not sure where it comes from (glibc I think) or how to get it built.
 Its a target library, so I have to build it for ppc and deliver it to
my target box.  That part I know how to do, its creating the library to
begin with that I don't know how to do.

Daniel Jacobowitz wrote:

>On Thu, Dec 18, 2003 at 03:27:26PM -0500, Christopher R. Johnson wrote:
>
>>Ok that worked pretty well, except that gdbserver wants a library called
>>libthread_db.so on the target.  From what little I can find this looks
>>like something I should build from the glibc mess.  Does anyone know
>>what options I need to add to the glibc build in order to create this
>>library?
>>
>
>Just make a symlink to libthread_db.so.1.
>
>>Thanks!
>>
>>Daniel Jacobowitz wrote:
>>
>>>On Wed, Dec 17, 2003 at 12:50:51PM -0500, Christopher R. Johnson wrote:
>>>
>>>>I'm about to go and grab gdb to build a host-based debugger and
>>>>target-based (PPC 405GP) gdbserver.  Anybody out there with advice on
>>>>how to do this?  Should it just work out of the box or is there stuff I
>>>>need to do to gdbserver for this platform?  The sources I just found are
>>>>gdb-6.0, and I'm using quite recent tools (gcc 3.3.2 glibc 2.3.2
>>>>binutils 2.14.90.0.5 - kudos to Dan Kegle for the crosstools stuff!!!).
>>>>
>>>>Thanks!
>>>>
>>>It should simply build and work.  You build GDB by setting a --target
>>>and gdbserver by setting a --host.  If you don't want to build a native
>>>GDB at the same time, run the --host build by gdbserver/configure
>>>instead of the top-level src/configure.
>>>
>>>--
>>>Daniel Jacobowitz
>>>MontaVista Software                         Debian GNU/Linux Developer
>>>
>>>
>>--
>>Christopher R. Johnson
>>Principal Software Engineer
>>GCC Printers
>>(781)276-8763
>>
>>
>>
>>
>

--
Christopher R. Johnson
Principal Software Engineer
GCC Printers
(781)276-8763


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: powerpc gdb and gdbserver

[Wolfgang Denk]

In message <3FE2101D.6000005@gcctech.com> you wrote:
>
> As I mentioned, the library doesn't exist.  I need to build it, but I'm
> not sure where it comes from (glibc I think) or how to get it built.

You can also just download the ELDK and use  the  ready-to-run  tools
(which include some extra fixes and extensions).

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Life would be so much easier if we could  just  look  at  the  source
code.                                                   -- Dave Olson

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: powerpc gdb and gdbserver

[Daniel Jacobowitz]

On Thu, Dec 18, 2003 at 03:37:49PM -0500, Christopher R. Johnson wrote:
> As I mentioned, the library doesn't exist.  I need to build it, but I'm
> not sure where it comes from (glibc I think) or how to get it built.
> Its a target library, so I have to build it for ppc and deliver it to
> my target box.  That part I know how to do, its creating the library to
> begin with that I don't know how to do.

Wherever you got glibc from you should have gotten libthread_db.so.1
also; maybe it just wasn't installed?

--
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: powerpc gdb and gdbserver

[Christopher R. Johnson]

Good news.  All I needed to do was setup Kegel's crosstool.sh by adding
the following to my powerpc-405.dat file:
GLIBC_EXTRA_CONFIG="--without-fp"

to

GLIBC_EXTRA_CONFIG="--without-fp --enable-add-ons=linuxthreads_db"

And used crosstool to rebuild the tool chain.  That resulted in the
library gdbserver needed to run.  I need some instruction from Dan on
how to rebuild just a component, after this type of config change, so I
don't go through the 2 hour crosstool run.

Daniel Jacobowitz wrote:

>On Thu, Dec 18, 2003 at 03:37:49PM -0500, Christopher R. Johnson wrote:
>
>>As I mentioned, the library doesn't exist.  I need to build it, but I'm
>>not sure where it comes from (glibc I think) or how to get it built.
>>Its a target library, so I have to build it for ppc and deliver it to
>>my target box.  That part I know how to do, its creating the library to
>>begin with that I don't know how to do.
>>
>
>Wherever you got glibc from you should have gotten libthread_db.so.1
>also; maybe it just wasn't installed?
>

--
Christopher R. Johnson
Principal Software Engineer
GCC Printers
(781)276-8763


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: powerpc gdb and gdbserver

[Marius Groeger]

On Thu, 18 Dec 2003, Daniel Jacobowitz wrote:

> On Wed, Dec 17, 2003 at 12:50:51PM -0500, Christopher R. Johnson wrote:
> >
> > I'm about to go and grab gdb to build a host-based debugger and
> > target-based (PPC 405GP) gdbserver.  Anybody out there with advice on
> > how to do this?  Should it just work out of the box or is there stuff I
> > need to do to gdbserver for this platform?  The sources I just found are
> > gdb-6.0, and I'm using quite recent tools (gcc 3.3.2 glibc 2.3.2
> > binutils 2.14.90.0.5 - kudos to Dan Kegle for the crosstools stuff!!!).
> >
> > Thanks!
>
> It should simply build and work.  You build GDB by setting a --target
> and gdbserver by setting a --host.  If you don't want to build a native
> GDB at the same time, run the --host build by gdbserver/configure
> instead of the top-level src/configure.

Yes, I can confirm that. I just tried single and multi threaded debugging
with gdb 6.0 release on a PPC405 target. I used a cross gdb with gdbserver
and a native gdb. Only the native gdb (ie. the one running on the target)
had problems with threads. Any idea about that?

Also, the official GDB site at http://www.gnu.org/software/gdb tells about
some known issues with the 6.0 release. One is that the PPC targets had not
yet implemented "the new frame format". I'm a little bit puzzled about that.
Does anyone know what this is about?

I'm using gcc 2.95.3 and glibc 2.2.5 at the moment.

Regards,
Marius

--
Marius Groeger <mgroeger@sysgo.com>
Project Manager

SYSGO Real-Time Solutions AG | Embedded and Real-Time Software
Am Pfaffenstein 14
55270 Klein-Winternheim, Germany

Voice: +49-6136-9948-0 | FAX: +49-6136-9948-10
www.sysgo.com | www.elinos.com | www.osek.de

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

Re: powerpc gdb and gdbserver

[Daniel Jacobowitz]

On Fri, Dec 19, 2003 at 10:37:23AM +0100, Marius Groeger wrote:
> Also, the official GDB site at http://www.gnu.org/software/gdb tells about
> some known issues with the 6.0 release. One is that the PPC targets had not
> yet implemented "the new frame format". I'm a little bit puzzled about that.
> Does anyone know what this is about?

It's not a big deal.  It's an internal GDB architecture change that
would improve the reliability of backtraces, and other related
features.

--
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/