Date: Sun, 17 Nov 2002 10:25:00 +0000 From: Doug Rabson <dfr@nlsystems.com> To: Marcel Moolenaar <marcel@xcllnt.net>, Daniel Eischen <eischen@pcnet1.pcnet.com> Cc: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/lib/libc_r/arch/ia64 _atomic_lock.S Message-ID: <200211171025.00359.dfr@nlsystems.com> In-Reply-To: <20021116195821.GB1058@dhcp01.pn.xcllnt.net> References: <20021116185125.GB618@dhcp01.pn.xcllnt.net> <Pine.GSO.4.10.10211161411500.14431-100000@pcnet1.pcnet.com> <20021116195821.GB1058@dhcp01.pn.xcllnt.net>
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On Saturday 16 November 2002 7:58 pm, Marcel Moolenaar wrote: > On Sat, Nov 16, 2002 at 02:13:19PM -0500, Daniel Eischen wrote: > > On Sat, 16 Nov 2002, Marcel Moolenaar wrote: > > > If you want me to send patches, let me know. I'm trying to figure > > > out what to do now that the *context functions have been turned > > > into syscalls. It complicates things... > > > > I'm working on converting libc_r to use *context() so don't > > worry about doing it yourself. > > Cool! > > 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=20 special-case them? This would work but it would also work for=20 heavyweight syscalls. I'm still worried about how you are going to=20 flush the user's register stack safely from kernel mode. --=20 Doug Rabson=09=09=09=09Mail: dfr@nlsystems.com =09=09=09=09=09Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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