From:	"Damian Yerrick" <web DOT poison AT pineight DOT 8m DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: spawnvpe hanging and bash GPF after running non-DJGPP exe
Date:	Sun, 17 Oct 1999 23:42:32 -0500
Organization:	Rose-Hulman Institute of Technology
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Dave Dribin <drib AT enteract DOT com> wrote in message
news:Pine DOT NEB DOT 3 DOT 96 DOT 991017172437 DOT 61999D-100000 AT shell-1 DOT enteract DOT com...
> --- Eli Zaretskii <eliz AT is DOT elta DOT co DOT il> wrote:
> > On 17 Oct 1999, Dave Dribin wrote:
> >
> > > It runs "prog.exe" correctly, but hangs on exit of the program.
> > >
> > > Bash also fails, but in a different way.  On return from "prog.exe",
> > > bash gets a general protection fault with this dump:
> > >
> > > General Protection Fault at eip=482f3; flags=3046
> > > eax=00000300 ebx=00000021 ecx=00000000 edx=00000000 esi=00181780
edi=0016b28c
> > > ebp=0016b134 esp=0016b128 cs=a7 ds=af es=b7 fs=bf gs=bf ss=af
error=00ec
> > >
> > > I looked up 0x482F3 in bash.exe and it is an "int 0x31" insruction.
> >
> > These symptoms seem to suggest that the program prog.exe that you
> > invoked invalidates the Int 31h entry in the IDT.  For example, it
> > could be that it hooks Int 31h, but doesn't unhook it before exiting.
> >
> > What is that program?  Is it a protected-mode program that uses some
> > DOS extender?  It is highly probable that it has a bug.  Perhaps if
> > you tell us what that program is, we could help you find a replacement
> > that can be run under Bash (and in the DJGPP environment in general).
>
> I was thinking about writing a program that launches games from a
> menu.  This particular game is Callus. You are correct that it is a
> protected-mode program.
>8
> Finding a replacement is difficult.

That is, unless you write a Callus clone. To see what I mean,
visit my homepage and download DOSArena.

--
Damian Yerrick
CM 398, Rose-Hulman Institute of Technology
5500 Wabash Ave
Terre Haute, IN 47803
http://come.to/yerrick

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