Date: Fri, 4 Jan 2002 14:36:22 +0100
From: Bernd Walter <ticso@cicely8.cicely.de>
To: Daniel Eischen <eischen@vigrid.com>
Cc: alpha@FreeBSD.org
Subject: Re: {get,set,make,swap}context for alpha
Message-ID: <20020104143622.A8703@cicely8.cicely.de>
In-Reply-To: <3C34C795.74B2B09C@vigrid.com>
References: <3C34C795.74B2B09C@vigrid.com>
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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 > > The standalone tarballs contain a makefile, the source, and a test > program so you don't have to patch your source tree and rebuild > libc to test these functions. Just do the following: > > $ cd /tmp > $ fetch http://people.freebsd.org/~deischen/ucontext/uc-alpha-standalone.tgz > $ tar -xzvf uc-alpha-standalone.tgz > $ cd alpha > $ make > $ ./test_context > > The first problem I'm having is that getcontext is getting caught > in an infinite loop. After the call to sigprocmask, the return > value is checked and the next branch instruction doesn't jump to > the label; it jumps to a few instructions prior and repeats all > over again. > > ... > CALL(_sigprocmask) /* see what's blocked */ > mov s0, a0 /* restore ptr to ucontext */ > --> beq v0, Lgc2 /* check for error */ > ldiq v0, -1 /* return -1 */ > br Lgcend > Lgc2: > ... One problem I found is that you defined getcontext to be a LEAF function, but actually call others. -- B.Walter COSMO-Project http://www.cosmo-project.de ticso@cicely.de Usergroup info@cosmo-project.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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