Date: Fri, 4 Jan 2002 09:14:58 -0500 (EST)
From: Daniel Eischen <eischen@pcnet1.pcnet.com>
To: Bernd Walter <ticso@cicely8.cicely.de>
Cc: alpha@FreeBSD.org
Subject: Re: {get,set,make,swap}context for alpha
Message-ID: <Pine.SUN.3.91.1020104090012.16130A-100000@pcnet1.pcnet.com>
In-Reply-To: <20020104143622.A8703@cicely8.cicely.de>
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On Fri, 4 Jan 2002, Bernd Walter wrote: > On Thu, Jan 03, 2002 at 04:05:25PM -0500, Daniel Eischen wrote: > > I've got *context implemented and working for i386, but need some > > help getting them to work on the alpha. Anyone here care to give > > it a try? You can get them from: > > > > http://people.freebsd.org/~deischen/ucontext/uc-libc-sys.diffs > > http://people.freebsd.org/~deischen/ucontext/uc-i386-standalone.tgz > > http://people.freebsd.org/~deischen/ucontext/uc-alpha-standalone.tgz [...] > One problem I found is that you defined getcontext to be a LEAF > function, but actually call others. Hmm, lib/libc/alpha/gen/setjmp.S does the same thing and also makes a call to sigprocmask. I see that it does save and restore ra though. So I guess I should use NESTED, or make sure I save and restore ra and any S register I use? It seems weird that ra needs to be restored in order for a branch instruction to work properly... -- Dan Eischen To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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