From:	Vik Heyndrickx <Vik DOT Heyndrickx AT rug DOT ac DOT be>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: A strange memory problem
Date:	Mon, 27 Apr 1998 09:07:24 +0200
Organization:	University of Ghent, Belgium
Lines:	24
Message-ID:	<35442EAC.7C98@rug.ac.be>
References:	<01bd7094$1de72440$78001dc2 AT rigotti>
NNTP-Posting-Host:	eduserv1.rug.ac.be
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Aurelio wrote:
>   __asm__ __volatile__("       \n
>   cld                          \n
>   movw $16000,%%cx             \n
>   movw %1,%%es                 \n
>   movl $0xA0000,%%edi          \n
>   movl %0,%%esi                \n
>   rep                          \n
>   movsl                         "
>   :
>   :"S"(DoubleBuffer),"g"(_dos_ds)
>   :"edi","cx","ebx","memory"
>   );
> 
> When I execute this code the program crashes with the error:
>        General protection fault etc..

DJGPP uses %es. You should not modify it without restoring its value
afterwards.

-- 
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  \___/ Heyndrickx /
   \ /-_-_-_-_-_-_/  Knight in the Order of the Unsigned Types

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