Date: Sun, 17 Nov 2002 10:56:47 -0800 From: Marcel Moolenaar <marcel@xcllnt.net> To: Doug Rabson <dfr@nlsystems.com> Cc: Daniel Eischen <eischen@pcnet1.pcnet.com>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/lib/libc_r/arch/ia64 _atomic_lock.S Message-ID: <20021117185647.GB603@athlon.pn.xcllnt.net> In-Reply-To: <200211171025.00359.dfr@nlsystems.com> References: <20021116185125.GB618@dhcp01.pn.xcllnt.net> <Pine.GSO.4.10.10211161411500.14431-100000@pcnet1.pcnet.com> <20021116195821.GB1058@dhcp01.pn.xcllnt.net> <200211171025.00359.dfr@nlsystems.com>
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On Sun, Nov 17, 2002 at 10:25:00AM +0000, Doug Rabson wrote: > > I hope to have the *context syscalls next week. I've decided to > > not attack the problem head on, because we don't have time to > > fix the infrastructure for it (we need to unwind to recreate the > > context). Instead, I hope to hack-up a workable solution from an > > ABI breaking change. The ABI breaker allows us to have lightweight > > syscalls, which we permanently want. So, doing that now is very > > attractive. The intend is to implement the *context syscalls as > > lightweight syscalls in a very hackish way. This serves as an > > experiment as well as solving an immediate problem. Let's hope > > it works out... > > So you intend to recognise the context calls in the syscall wrapper and > special-case them? This would work but it would also work for > heavyweight syscalls. I'm still worried about how you are going to > flush the user's register stack safely from kernel mode. I don't intend to, but it's possible that I'm overlooking a case here. The only fear I have is that the work is exponentially growing with every step I make... -- Marcel Moolenaar USPA: A-39004 marcel@xcllnt.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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