Text 3227, 92 rader
Skriven 2010-11-25 08:38:55 av Lars Erdmann
Ärende: Re: Strange trap in OS2KRNL on boot - solved ? Maybe ...
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From: Lars Erdmann <lars.erdmann@arcor.de>

Hallo,

in my BIOS I have now DISABLED "Quick Power On Self Test". That seems to
initialize memory
(at least the relevant parts of it) in a way that the trap below does not seem
to occur any more.
Seems that PMSHELL.EXE is using some uninitialized variable that often enough
has a value
that does not hurt but sometimes it does.
BIOS writing some byte pattern to memory seems to cure the problem.

Lars

Lars Erdmann wrote:
> Hallo,
>
> eCS 1.2 R, all the latest and greatest fixes, with ACPI 3.18 running on
single core with PIC mode
> kernel: 14.104a_SMP
>
> I get a sporadic trap when the system tries to start the 2. instance of
PMSHELL.EXE (the WPS).
> In other words: the boot with the screen being in text mode is almost over
and the system is switching to graphics mode with
> the WPS about to show.
>
> I produced a complete system dump (2 GB) which contains this trap info:
>
> INFORMATION ZUR ALARMNACHRICHT (TRAP)
> OS/2-Kernel-Überarbeitung 14.104a_SMP
> Exception in module: OS2KRNL
> TRAP 000e ERRCD=0000 ERACC=**** ERLIM=******** CPU=01
> EAX=fbd79000 EBX=fbd79000 ECX=00000000 EDX=fbd78ffc
> ESI=fbc01011 EDI=fbd79000 EBP=00005434 FLG=00010246
> CS:EIP=0168:fff70ccb CSACC=c09b CSLIM=ffffffff
> SS:ESP=1530:00005380 SSACC=1097 SSLIM=00004587
> DS=0160 DSACC=c093 DSLIM=ffffffff CR0=8001001b
> ES=0160 ESACC=c093 ESLIM=ffffffff CR2=fbd79000
> FS=0000 FSACC=**** FSLIM=********
> GS=0000 GSACC=**** GSLIM=********
> %fff704c0 OS2KRNL _ldrGetMte + 80b
>
>
> Here the relevant piece of code encompassing the problem:
>
> %fff70cb2 eb07 jmp %fff70cbb
> %fff70cb4 037d98 add edi,dword ptr [ebp-68]
> %fff70cb7 3bdf cmp ebx,edi
> %fff70cb9 77b5 ja %fff70c70
> %fff70cbb 8b9558ffffff mov edx,dword ptr [ebp+ffffff58]
> %fff70cc1 897580 mov dword ptr [ebp-80],esi
> %fff70cc4 897da0 mov dword ptr [ebp-60],edi
> %fff70cc7 83c204 add edx,+04
> %fff70cca 49 dec ecx
> %fff70ccb 8b4204 mov eax,dword ptr [edx+04] <----- trap E
> %fff70cce 034584 add eax,dword ptr [ebp-7c]
> %fff70cd1 89459c mov dword ptr [ebp-64],eax
>
>
> When I have a sporadic trap, it is ALWAYS this one.
> Obviously, the trap occurs in OS/2's "Executable Module loader". Anyone have
an idea of what could be the reason ?
> Some corrupted disk sector and PMSHELL.EXE being part of the game ?
>
>
> This is the IDE driver that I use, in case it matters:
>
> DANIS506.ADD:
> Build Level Display Facility Version 6.12.675 Sep 25 2001
> (C) Copyright IBM Corporation 1993-2001
> Signature: @#DANI:1.8#@##1## 12.5.2008 17:06:29 Nachtigall::::5::@@ Adapter
Driver for PATA/SATA DASD
> Vendor: DANI
> Revision: 1.08
> Date/Time: 12.5.2008 17:06:29
> Build Machine: Nachtigall
> File Version: 1.8.5
> Description: Adapter Driver for PATA/SATA DASD
>
>
> Thanks for any help on this topic. As I said: I have a complete system dump.
>
> Lars


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