Re: gdb for mips64

[David Daney <ddaney@caviumnetworks.com>]

On 10/26/2010 05:47 AM, Maciej W. Rozycki wrote:
> On Mon, 25 Oct 2010, David Daney wrote:
>
>> I don't think a 32-bit gdb can debug 64-bit processes :-(.
>
>   And it should (assuming ptrace(2) gets things right) -- if what you say
> is true, then it's a bug rather than a deliberate design decision.  To add
> some irony, MIPS GDB is always 64-bit internally.
>
>>> (gdb) r
>>> Starting program: /home/camm/gcl-2.6.8pre/unixport/saved_pre_gcl
>>> /home/wingsun/develop/build/gdb/gdb-6.8/gdb/mips-tdep.c:603: internal-error:
>>> bad register size
>>> A problem internal to GDB has been detected,
>>> further debugging may prove unreliable.
>
>   Try a newer version though -- GDB 7.2 has been out for a (short) while
> now.  You're missing 2.5 years of development.  If still unsuccessful with
> a pristine release from ftp.gnu.org, then file a bug report at
> http://sourceware.org/gdb/bugs/.
>

After more though, I think you may have to configure with 
--enable-64-bit-bfd for a 32-bit gdb to work on 64-bit processes. 
Although I have not actually tested that.  In the past, I have just 
built a native 64-bit gdb.

David Daney