From owner-freebsd-emulation  Wed Sep  8 11:35:29 1999
Delivered-To: freebsd-emulation@freebsd.org
Received: from lor.watermarkgroup.com (lor.watermarkgroup.com [207.202.73.33])
	by hub.freebsd.org (Postfix) with ESMTP id C4C71150C4
	for <FreeBSD-emulation@FreeBSD.ORG>; Wed,  8 Sep 1999 11:35:26 -0700 (PDT)
	(envelope-from luoqi@watermarkgroup.com)
Received: (from luoqi@localhost)
	by lor.watermarkgroup.com (8.8.8/8.8.8) id OAA12069;
	Wed, 8 Sep 1999 14:33:57 -0400 (EDT)
	(envelope-from luoqi)
Date: Wed, 8 Sep 1999 14:33:57 -0400 (EDT)
From: Luoqi Chen <luoqi@watermarkgroup.com>
Message-Id: <199909081833.OAA12069@lor.watermarkgroup.com>
To: marcus@jet.franken.de, nox@jelal.kn-bremen.de
Subject: Re: debugger, stepi, c(ontinue) from breakpoint...
Cc: FreeBSD-emulation@FreeBSD.ORG, wine-devel@winehq.com
Sender: owner-freebsd-emulation@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org

>  
> -	if ((frame.tf_eflags & PSL_T) && !(frame.tf_eflags & PSL_VM)) {
> +	if ((frame.tf_eflags & PSL_T) && !(frame.tf_eflags & PSL_VM) &&
> +	    *callp->sy_call != sigreturn && *callp->sy_call != linux_sigreturn) {
>  		/* Traced syscall. */
>  		frame.tf_eflags &= ~PSL_T;
> +		/* tell the signal handler this is a trace trap */
> +		frame.tf_trapno = T_TRCTRAP;
>  		trapsignal(p, SIGTRAP, 0);
>  	}
>  
>  (so wine must be the first program that handles SIGTAP for itself and
> sets the trace bit from a signal handler? :)  I Cc'd this to -emulation,
> are any committers reading or should i also send-pr it?)
> 
It seems to me that SIGTRAP is signalled for either a breakpoint or the
TF bit in eflags, so it is probably safe to assume it's a single step
unless the trapno is T_BPTTRAP.

-lq


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-emulation" in the body of the message