On Thu, May 28, 2020 at 12:15 AM Otto Moerbeek <o...@drijf.net> wrote:
>
> On Wed, May 27, 2020 at 11:28:09PM -0600, Jason A. Donenfeld wrote:
>
> > Hi Otto,
> >
> > On Wed, May 27, 2020 at 4:07 AM Otto Moerbeek <o...@drijf.net> wrote:
> > > Although I'm not terribly interested in bugs that are only seen (s0
> > > far) using emulation, please send me the details on how you set up
> > > qemu.
> >
> > Right, it could very well be a TCG bug. But maybe not. Here's how to
> > get things [not-]working:
> >
> > $ qemu-system-sparc64 --version
> > QEMU emulator version 5.0.0
> > $ qemu-img convert -O qcow2 miniroot66.fs disk.qcow2
> > $ qemu-img resize disk.qcow2 20G
> > $ qemu-system-sparc64 \
> >         -machine sun4u \
> >         -m 1024 \
> >         -drive file=disk.qcow2,if=ide \
> >         -net nic,model=ne2k_pci -net user \
> >         -nographic -serial stdio -monitor none \
> >         -boot c
> >
> > OpenBIOS for Sparc64
> > [...]
> > Loading FCode image...
> > Loaded 5840 bytes
> > entry point is 0x4000
> > Evaluating FCode...
> > OpenBSD IEEE 1275 Bootblock 1.4
> > ..>> OpenBSD BOOT 1.14
> > Trying bsd...
> > [...]
> > OpenBSD 6.6 (RAMDISK) #84: Sat Oct 12 10:42:12 MDT 2019
> >    dera...@sparc64.openbsd.org:/usr/src/sys/arch/sparc64/compile/RAMDISK
> > [...]
> > Welcome to the OpenBSD/sparc64 6.6 installation program.
> > (I)nstall, (U)pgrade, (A)utoinstall or (S)hell?
> >
> > If you swap out miniroot66.fs for miniroot67.fs, you'll get the error
> > I sent prior.
> >
> > Jason
> >
>
> Does not work for me, error message on OpenBSD/amd64:
>
> Could not allocate dynamic translator buffer
>
> ktrace snippet:
>
> 74960 qemu-system-spar CALL  
> mmap(0,0x40000000,0x7<PROT_READ|PROT_WRITE|PROT_EX
> EC>,0x1002<MAP_PRIVATE|MAP_ANON>,-1,0)
> 74960 qemu-system-spar RET   mmap -1 errno 91 Not supported
>
> It's doing a RWX mapping, won't fly on OpenBSD.
>
>         -Otto

This sequence worked fine on my OpenBSD box for reproducing the maybe-bug. 
(See: mount option.) YMMV:

bart ~ # pkg_add git gmake glib2 bison sdl2 gsed bash xz
[...]
bart ~ # ftp -o - https://download.qemu.org/qemu-5.0.0.tar.xz | unxz | tar xf -
bart ~ # cd qemu-5.0.0/
bart ~/qemu-5.0.0 # mkdir build && cd build
bart ~/qemu-5.0.0/build # ../configure && gmake -j$(sysctl -n hw.ncpu)
[...]
bart ~/qemu-5.0.0/build # ftp 
https://cdn.openbsd.org/pub/OpenBSD/6.7/sparc64/miniroot67.fs
[...]
bart ~/qemu-5.0.0/build # ./qemu-img convert -O qcow2 miniroot67.fs disk.qcow2
bart ~/qemu-5.0.0/build # ./qemu-img resize disk.qcow2 20G
Image resized.
bart ~/qemu-5.0.0/build # mount
/dev/sd0a on / type ffs (local, wxallowed)
bart ~/qemu-5.0.0/build # ./sparc64-softmmu/qemu-system-sparc64 -machine sun4u 
-m 1024 -drive file=disk.qcow2,if=ide -net nic,model=ne2k_pci -net user 
-nographic -serial stdio -monitor none -boot c
OpenBIOS for Sparc64
Configuration device id QEMU version 1 machine id 0
kernel cmdline 
CPUs: 1 x SUNW,UltraSPARC-IIi
UUID: 00000000-0000-0000-0000-000000000000
Welcome to OpenBIOS v1.1 built on Oct 28 2019 17:08
  Type 'help' for detailed information
Trying disk:a...
Not a bootable ELF image
Not a bootable a.out image
Loading FCode image...
Loaded 6882 bytes
entry point is 0x4000
Evaluating FCode...
OpenBSD IEEE 1275 Bootblock 2.0
..reserved fcode word.
Unhandled Exception 0x0000000000000030
PC = 0x00000000ffd0f3ac NPC = 0x00000000ffd0f3b0
Stopping execution

Jason

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