Re: [PATCH 3/3] tools/nolibc: add support for 32-bit parisc

[Thomas Weißschuh]

On 2026-04-07 20:40:39+0200, Helge Deller wrote:
> On 4/7/26 20:14, Thomas Weißschuh wrote:
> > On 2026-04-07 19:33:05+0200, Helge Deller wrote:
> > > On 4/7/26 18:37, Thomas Weißschuh wrote:
> > > > Extend nolibc to target the 32-bit parisc architecture.
> > > > 64-bit is not yet supported.
> > > 
> > > Adding 64-bit would be very cool.
> > 
> > It is on my roadmap. But the 64-bit kernel I tried didn't seem to boot.
> 
> Just in case you used qemu, you need to use "-machine C3700" or "-machine A400".
> The default B160L is a 32-bit only machine.

Thanks, I'll try that.

> > Also it would be nice if CONFIG_COMPAT could be disabled.
> 
> Ah... never thought about that. Will check, but I don't think
> the kernel will become much smaller.

It's not about size for me but about simplifying the toolchain setup.

> > > Dave Anglin is currently working on adding 64-bit userspace support
> > > to gcc/glibc (dynamic loader), but that takes some time.
> > > In the meantime a 64-bit nolibc would be cool for testing.
> > 
> > Nice. Do you have instructions to run the 64-bit kernel in QEMU?
> 
> As mentioned above, I think the "-machine C3700" should be sufficient.
> Some more info is at: https://parisc.docs.kernel.org/en/latest/qemu.html
> 
> > Is qemu-user support planned?

> 32-bit qemu user works great and is used on many debian buildd machines.
> 64-bit is on my todo list, I just need time to do it :-)

32-bit qemu user is indeed used by the proposed patches. I'm looking
forward to the 64-bit support.

Thomas