Date: Mon, 28 May 2001 20:30:51 -0300 From: "Daniel C. Sobral" <dcs@newsguy.com> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: mjacob@feral.com, alpha@FreeBSD.ORG Subject: Re: Latest on ' HEADS UP: loader broken' Message-ID: <3B12DFAB.79245E9F@newsguy.com> References: <15122.40043.23892.164757@grasshopper.cs.duke.edu> <Pine.LNX.4.21.0105281147010.23428-100000@zeppo.feral.com> <15122.40785.294428.276049@grasshopper.cs.duke.edu> <15122.45376.304502.55208@grasshopper.cs.duke.edu>
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Andrew Gallatin wrote: > > 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 -- ) The function twoConstParen has nothing to do with it. It's all the static functions in between. :-) Store, on the other hand, looks a natural candidate to me. I have even some evil nasty suspicions... Could you (or any other alpha user) try replacing the two values with 0 and see if the error persist? If so, it's a good thing your alpha is this nice, because it would take me AGES to even begin to suspect it. -- Daniel C. Sobral (8-DCS) dcs@newsguy.com dcs@freebsd.org capo@the.secret.bsdconspiracy.net wow regex humor... I'm a geek To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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