Problems with remote debugging on MBX860

Problems with remote debugging on MBX860

[Pedro Parrilla]

 Hello!

    I am debugging  a remote target (Hard Hat Linux on a MBX860) from my

host (Red Hat Linux 7.0 on x86 PC) with ppc_8xx_gdb(cross-dev). I got to
connect both with
'target extended-remote' directive in the host, and with gdbserver in
the target, gdb can do STEP,RUN...and the like, but I can't see the
variables values. If I try to print any local variable GDB response is
'incomplete type'. I've compiled with ppc_8xx-gcc and the 'g' option and
I've  loaded the program in GDB with file 'program'...I don't Know what
more I should do...Any bad
configuration?

 Thanks.


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Re: Problems with remote debugging on MBX860

[Peter Desnoyers]

I've had luck with 'target remote /dev/<xxx>' instead of
extended-remote.  The following mod to the top-level Makefile helps,
too:

! CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -O2
-fno-strict-aliasing
! ifdef CONFIG_KGDB
! CFLAGS += -g -ggdb
! else
! CFLAGS += -fomit-frame-pointer
! endif

In addition, whenever I enabled kgdb I was getting an oops in
rs_8xx_interrupt sometime during boot due to info->tty being NULL - I
added a check for that and a return, and things seem to be fine.

--
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 Peter Desnoyers            (781) 457-1165   pdesnoyers@chinook.com
 Chinook Communications     (617) 661-1979   pjd@fred.cambridge.ma.us
 100 Hayden Ave, Lexington MA 02421

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Re: Problems with remote debugging on MBX860

[Cal Erickson]

Pedro,
All  you need to add is the -ggdb option after the -g in your build of
your application. This option provides gdb with more information
about local variables that -g cannot. Everything else should be fine.
If you were going to debug a kernel using gdb you would not be
using gdbserver.

Cal Erickson
Pedro Parrilla wrote:

>  Hello!
>
>     I am debugging  a remote target (Hard Hat Linux on a MBX860) from my
>
> host (Red Hat Linux 7.0 on x86 PC) with ppc_8xx_gdb(cross-dev). I got to
> connect both with
> 'target extended-remote' directive in the host, and with gdbserver in
> the target, gdb can do STEP,RUN...and the like, but I can't see the
> variables values. If I try to print any local variable GDB response is
> 'incomplete type'. I've compiled with ppc_8xx-gcc and the 'g' option and
> I've  loaded the program in GDB with file 'program'...I don't Know what
> more I should do...Any bad
> configuration?
>
>  Thanks.
>

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Linux Consultant             1237 E. Arques Ave.
Phone (408) 328-0304         Sunnyvale CA 94085
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