Re: gdb support for SME-without-SVE ?

Peter Maydell via Gdb
2026-01-30T17:18:22Z

On Fri, 30 Jan 2026 at 17:06, Thiago Jung Bauermann
<thiago.bauermann@linaro.org> wrote:
> Peter Maydell <peter.maydell@linaro.org> writes:
> > Is there something I can rm in my build directory that will delete
> > all the testsuite stuff and force it to recreate it ? (I would
> > prefer not to have to blow away the whole build directory and
> > spend hours waiting for gdb to be rebuilt...)
>
> You can try deleting these under $GDB_BUILD_DIR:
>
> gdb/testsuite/site.exp
> gdb/testsuite/cache
> gdb/testsuite/outputs
>
> In the worst case, you could delete the whole gdb/ directory. You'll
> have to rebuild all the gdb files, but at least not bfd, gdbserver,
> gdbsupport etc.

I tried removing all of gdb/testsuite/ and then putting back
the files that 'make' complained were missing (config.status
and Makefile). That seemed to do the trick at least as far
as being able to run the tests now. With my updated QEMU
(which you can find in the new "sme-no-sve-2" in my gitlab repo)
that can now run the tests without making the kernel fall over.
It reports:

# of expected passes 241
# of unexpected failures 37

Is that the same as you see on the fast model, or does this
indicate that I still have more QEMU bugs to track down?
(Peeking into gdb.log, these failures seem to be run-on
failures from the program under test getting a SIGILL
in initialize_zt_state(), so my guess is QEMU is still not
quite right.)

thanks
-- PMM