From owner-freebsd-alpha  Mon May 28 13:23: 7 2001
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Date: Mon, 28 May 2001 13:22:59 -0700 (PDT)
From: Matthew Jacob <mjacob@feral.com>
Reply-To: mjacob@feral.com
To: Andrew Gallatin <gallatin@cs.duke.edu>
Cc: "Daniel C. Sobral" <dcs@newsguy.com>, alpha@FreeBSD.ORG
Subject: Re: Latest on ' HEADS UP: loader broken'
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Ah, yes- you got a lot further than I did- I just exited. This really should
be enough for Daniel to figure out.

> 
> Well, whatever firmware I'm running on the AS500 has a rather nice
> feature -- it seems to have a trap handler installed for unaligned
> access traps.
> 
> FreeBSD/alpha SRM disk boot, Revision 1.1
> (gallatin@thunder.cs.duke.edu, Mon May 28 10:56:51 EDT 2001)
> Memory: 131072 k
> \
> fatal kernel trap:
> 
>     trap entry = 0x4 (unaligned access fault)
>     a0         = 0x2003d9bc
>     a1         = 0x2d
>     a2         = 0x0
>     pc         = 0x200285c4
>     ra         = 0x200285b8
>     curproc    = 0xfffffe0008577cc0
> 
> halted CPU 0
> 
> 
> If the PC can be trusted, it is somewhere inside of twoConstParen
> % nm -n loader.sym
> <....>
> 0000000020026540 T ficlCompileSoftCore
> 0000000020026960 T ficlParseNumber
> 00000000200276a0 T constantParen
> 0000000020027720 T twoConstParen
> 00000000200290c0 T parseStepParen
> 000000002002ad20 T ficlTick
> 000000002002f100 T ficlWordClassify
> <....>
> 
> (gdb) l *0x200285c4
> 0x200285c4 is in store (words.c:990).
> 985         CELL *pCell;
> 986     #if FICL_ROBUST > 1
> 987         vmCheckStack(pVM, 2, 0);
> 988     #endif
> 989         pCell = (CELL *)stackPopPtr(pVM->pStack);
> 990         *pCell = stackPop(pVM->pStack);
> 991     }
> 992
> 993     /*
> 994     ** two-store    CORE ( x1 x2 a-addr -- )
> 
> 
> 
> Drew
> 


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