Date: Wed, 9 May 2001 13:57:53 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender: eliz AT is
To: ywshei <ywshei AT tao DOT iam DOT ntu DOT edu DOT tw>
cc: djgpp AT delorie DOT com
Subject: Re: GPF after a litte bit of running time.
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On Wed, 9 May 2001, ywshei wrote:

>  Any one  has this experice of run a program compiled by DJGPP as you
> running a peroid about ten seconds, then RMCB GPF cccured
> The dump message are as the following
> Page Fault cr2=1013bf84 in RMCB at eip=13bf84; flags=3002
> eax=00000001 ebx=000010c0 ecx=00000000 edx=0013592e esi=0000142a edi=0000234c
> ebp=00000000 esp=00002318 cs=a7 ds=3b es=33 fs=33 gs=0 ss=33 error=0004.

This message comes from CWSDPMI, the DPMI server used by DJGPP
programs when they run on plain DOS.  It usually means that your
program hooked some hardware interrupt, but failed to lock memory
touched by the interrupt handler.  This is an absolute no-no in the
protected-mode enviroment which used virtual memory, because paging
should never happen inside an interrupt handler.

See section 12.2 of the DJGPP FAQ list for more details.

The "eip=13bf84" part tells you where is the code which tried to
access unlocked memory.  If you want to convert that to something
humanly readable, type "gdb program.exe", where program.exe is your
program, and at GDB's prompt type "list *0x13bf84".  GDB will list the
source lines around the point of crash.