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Date: Wed, 30 Jul 2008 21:45:57 +0300
From: "Blue Swirl" <blauwirbel@gmail.com>
Subject: Re: [Qemu-devel] Mac OS X PPC host support (was: [4932] Preliminary
	PPC64/Linux host support)
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To: qemu-devel@nongnu.org

On 7/29/08, malc <av1474@comtv.ru> wrote:
>  I have made a stab at making it work and tried it on MacOS X (Tiger) that
>  i have here, for Sparc it progress a bit further but still meets it's doom
>  shortly:
>
>  qemu: fatal: Trap 0x29 while interrupts disabled, Error state
>  pc: ffd04020  npc: ffd04024
>  General Registers:
>  %g0: 00000000   %g1: 00000000   %g2: ffd908e0   %g3: ffd00000
>  %g4: ffd83038   %g5: 00000001   %g6: 00000000   %g7: 00000000
>  Current Register Window:
>  %o0: 00000000   %o1: 00000000   %o2: 00000000   %o3: 00000000
>  %o4: 00000000   %o5: 00000000   %o6: ffdd3fa0   %o7: 00000000
>  %l0: 00000000   %l1: 00000000   %l2: 00000000   %l3: 00000000
>  %l4: 00000000   %l5: 00000000   %l6: 00000000   %l7: 00000000
>  %i0: 00000000   %i1: 00000000   %i2: 00000000   %i3: 00000000
>  %i4: 00000000   %i5: 00000000   %i6: 00000000   %i7: 00000000
>
>  Floating Point Registers:
>  [all bit zero FPRs snipped]
>  psr: 0x04001fc0 -> ---- SP- wim: 0x00000001
>  fsr: 0x00080000
>
>  BlueSwirl, rings any bells?

29 is Data Access Exception, raised from unassigned memory access. The code is

0xffd04020:  std  %l0, [ %sp ]

which is a double word store. Address in %sp (%o6, 0xffdd3fa0) is OK.
So I'd check if qemu_st64 generates correct code.