Date: Fri, 19 Nov 2004 19:40:22 -0800
Message-Id: <200411200340.iAK3eM9S009722@magilla.sf.frob.com>
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From: Roland McGrath <roland@redhat.com>
To: Daniel Jacobowitz <dan@debian.org>
Cc: Eric Pouech <pouech-eric@wanadoo.fr>, Linus Torvalds <torvalds@osdl.org>,
       Mike Hearn <mh@codeweavers.com>, linux-kernel@vger.kernel.org,
       Andrew Morton <akpm@osdl.org>, wine-devel <wine-devel@winehq.com>
Subject: Re: ptrace single-stepping change breaks Wine
In-Reply-To: Daniel Jacobowitz's message of  Friday, 19 November 2004 16:23:28 -0500 <20041119212327.GA8121@nevyn.them.org>
Sender: linux-kernel-owner@vger.kernel.org
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> I'm getting the feeling that the question of whether to step into
> signal handlers is orthogonal to single-stepping; 

No, it's not.  You only ever step into a handler when you ask to.
That's already the interface.

> Platforms which don't implement PTRACE_SINGLESTEP would probably
> appreciate this.  A "single step" which stops you after setting up the
> signal trampoline and adjusting the PC, before executing any
> instructions in the handler.

That's what PTRACE_SINGLESTEP with a nonzero signal number does since it
was fixed.
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