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Re: [Qemu-devel] [PATCH 0/5] target-m68k patches

From: Laurent Vivier
Subject: Re: [Qemu-devel] [PATCH 0/5] target-m68k patches
Date: Mon, 7 Nov 2016 13:24:20 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0

Le 07/11/2016 à 13:08, Richard Henderson a écrit :
> On 11/06/2016 08:52 PM, Laurent Vivier wrote:
>>> Richard Henderson (4):
>>>   target-m68k: Do not cpu_abort on undefined insns
>>>   target-m68k: Inline shifts
>>>   target-m68k: Implement bitfield ops for registers
>>>   target-m68k: Implement bitfield ops for memory
>> There is something wrong with the bitfield patches, because when I use
>> them instead of the version I use usually I'm not able to boot a
>> container with qemu-m68k (SEGFAULT).
> Ah, too bad.  I was testing with the linux-user-0.3 busybox, but we
> don't yet implement enough to actually execute it.  So the testing
> consisted of maybe 3 or 4 such insns until I reach the fmovemx.  ;-)
> Can you tell if the breakage is limited to the memory patch, or if the
> register patch is also broken?

I need to test more, because if I only apply the register patch, I have
an illegal instruction exception.

If it can help:

sudo QEMU_LOG=in_asm chroot /var/lib/lxc/virtm68k-etch-m68k/rootfs 2>&1
|grep bf
0xf67f9160:  bfextu %d3,27,3,%d1
0xf67f8988:  bftst %d1,30,2
0xf67f2786:  bfins %d0,%a1@,0,2
0xf67eeb56:  bfins %d0,%a2@(824),0,2
0xf67f362c:  bfins %d0,%a2@(384),5,2
0xf67f8b80:  bftst %d1,30,2
0xf67f8b9e:  bftst %d4,30,2
0xf67f8998:  bftst %d0,30,2
0xf67f8998:  bftst %d0,30,2
0xf67f9160:  bfextu %d3,27,3,%d1
0xf67f8f88:  bftst %d4,30,2
0xf67f39d8:  bfins %d0,%a1@(384),5,2
0xf67f3876:  bfclr %a0@(384),5,2

If you want to have a try, this tree is based on tgt-m68k + what is
needed to boot an etch-m68k container.

git://github.com/vivier/qemu-m68k.git for-rth

The working tree is:

git://github.com/vivier/qemu-m68k.git m68k-dev


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