Re: Random gdbserver question (x86)

[Michael Snyder <msnyder at vmware dot com>]

Daniel Jacobowitz wrote:
> On Wed, Mar 31, 2010 at 10:35:29AM -0700, Michael Snyder wrote:
> > Actually, I phrase it as a question even though I am pretty sure it
> > is true.  My real question is "Why?".  It seems to me that if we just
> > included amd64-linux-nat.o and amd64-*-tdep.o in the build, then
> > 32-bit gdb should be able to debug 64-bit native apps.
>
> I don't think the necessary kernel interfaces exist.  Or at least, we
> aren't using them.  Compare the offsets in the two nat files.

Hmmm, but both nat files get linked in when we do a 64 bit build.

Suppose I wanted to build gdb on a 32 bit host, but use it on a
64 bit host.  If I specify "target=x86_64-linux", then my gdb will
not work natively on *either* host, because it will be built as a
cross-only debugger.