Is it possible to debug a 64-bit executable ('bin/guile' [1]) using
32-bit GDB?  (I use GNU/Linux.)

I've tried to configure GDB 7.6 with '--enable-64-bit-bfd' (see [2]),
but it still shows "mips-tdep.c:709: internal-error: bad register
size".

[1] http://www.fdn.fr/~lcourtes/tmp/guile-static-stripped-2.0.9-mips64el-linux-gnuabi64.tar.xz
[2] http://www.linux-mips.org/archives/linux-mips/2010-10/msg00336.html