Via:	uk.ac.sheffield-hallam; Sat, 9 Apr 1994 12:26:22 +0100
From:	A DOT K DOT Heath AT sheffield-hallam DOT ac DOT uk (Andy Heath)
To:	djgpp AT sun DOT soe DOT clarkson DOT edu (djgpp)
Subject:	go32 problem
Date:	Sat, 09 Apr 94 11:48
Sender:	A DOT K DOT Heath AT sheffield-hallam DOT ac DOT uk

PLease can anyone advise me about the following.  I'm not on the mailing
list so if you can help please reply to my email address.

I'm using djgpp 1.11 etc. on a 486 PC with Windows 3.1.  The pc has some
EMS and some XMS.
My c progs need to use pieces of (virtual) memory to manipulate 16 bit 
images,
each piece being 524288 bytes.  The problem I'm encountering occurs when 
all
of the following elements are present

1) the prog is running in a dos box (ie from windows 3.1)
AND
2) there's an array of unsigned char or similar of size 524288 which is
local to a function. (eg declared inside main).

In these circumstances I get a graceful refusal to continue (reproduced 
below).

The problem goes away if I don't use windows or if I make the array
global or if I use malloc to get the space.  Obviously I can get round
it but it's annoying because I need to run the same progs on a sun.

Is this a known problem ?

This is what happens
-------------------------------------------------------------
go32 version 1.11.maint4 Copyright (C) 1993 DJ Delorie
General Protection Fault at eip=11e6
eax=fffd1cb0 ebx=00051cc4 ecx=00053010 edx=fffd1cb0 esi=00000000 
edi=00000000
ebp=00051cb0 esp=fffd1ca8 cs=bf ds=b7 es=b7 fs=b7 gs=cf ss=c7 
cr2=00001fe5
Call frame traceback EIPs:
  0x000011e6
-----------------------------------------------------------------

Thankyou in advance to anybody who gives this attention

Andy Heath

- Raw text -