Date: Tue, 4 Apr 2000 14:04:58 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: djgpp AT delorie DOT com
Subject: Re: HELP! : Debugging a c/asm mixed programs
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On Mon, 3 Apr 2000, batchex wrote:

> I got around the random exception stuff in FSDB, but new one
> arises.
> 
> Hmm, I still haven't upgrade to 2.03 yet.

Please do.

> detect_dpmi_ok1:
>         mov     [dosmem_selector],dx ; here FSDB throws
> exception 0x3030 or 0x3036
>         mov     [dosmem_segment],ax

Does the problem happen when you single-step through this instruction,
or even if you let the program run freely?

> ; if I try 'x/20bx vbe20DrvInfo' here, GDB crashes, error 04.
> vbe20DrvInfo is global.

Sorry, I don't understand: where is ``here''?  On what line(s) does
the crash happen?  Are there any places where the same command does
not crash?

Also, what version of GDB do you have installed?  What does
"gdb --version"  print?

> How can I redirect the crash info from GDB to a file?

Invoke GDB with its stderr redirected:

       redir -e crash.txt gdb prog.exe

where prog.exe is your program.  When it crashes, the file crash.txt
will hold the crash message; please post it here.

> Also, what do I need to upgrade my djgpp to 2.03?

Download and unzip v2/djdev203.zip.  It comes with a new fsdb.exe,
among other things.