[OpenBIOS] SOLVED: the mystery of Solaris on SPARC32 and the missing Forth arguments

Artyom Tarasenko atar4qemu at gmail.com
Fri Oct 29 22:42:12 CEST 2010

On Fri, Oct 29, 2010 at 10:28 PM, Mark Cave-Ayland
<mark.cave-ayland at siriusit.co.uk> wrote:
> Blue Swirl wrote:
>>> So it would be useful to have someone who understands both SPARC32 and
>>> qemu
>>> to take a look (hint, hint!) ;)

>> Trap 0x29 is TT_DATA_ACCESS, invoked on access to unassigned memory by
>> QEMU. Perhaps enabling DEBUG_UNASSIGNED in target-sparc/op_helper.c
>> may reveal something.
>> It has been suspected that QEMU may be a bit too trigger happy with
>> unassigned memory accesses. There may also be an undocumented device,
>> or Solaris just tries to access a device which does not exist on SS-5.
> Okay. With that DEBUG_UNASSIGNED enabled I get the following message as the
> trap is invoked:
> Unassigned mem write access of 4 bytes to ffffffffffff0ecc from f004127c

No, it's not the same as with OBP. Btw I have a fix for the OBP fault,
but it waits till someone commits the
promised refactoring.

> Is there some kind of device map for SPARC32 somewhere so we can lookup what
> kind of device this is?

None. It probably tries to access something which is not mapped.

Artyom Tarasenko

solaris/sparc under qemu blog: http://tyom.blogspot.com/

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