From: Jeff Dike <jdike@addtoit.com>
To: Blaisorblade <blaisorblade@yahoo.it>
Cc: user-mode-linux-devel@lists.sourceforge.net,
Allan Graves <allan.graves@oracle.com>
Subject: Re: [uml-devel] Clearing kmalloc_ok during shutdown is broken - malloc will clear our data.
Date: Sun, 2 Oct 2005 14:27:55 -0400 [thread overview]
Message-ID: <20051002182755.GB26063@ccure.user-mode-linux.org> (raw)
In-Reply-To: <200510021231.05260.blaisorblade@yahoo.it>
On Sun, Oct 02, 2005 at 12:31:04PM +0200, Blaisorblade wrote:
> > Yeah, it's bad. The other way to do it is to explictly save the registers
> > in the thread struct, which is effectively the reimplementing setjmp option
> > which you mentioned.
> At least, if we save them separately from the jmpbuf_t, we can use them for
> sysrq t, without reimplementing setjmp() and longjmp(). Not nice, wastes 24
> bytes, but would work.
Yup.
> I have the doubt that the location of those registers is part of the ABI,
I think they are probably not.
> Probably, however, it's just better to test on, say, a Slackware 8.1, and hope
> for the best and go doing a fix when things change.
Yeah, I agree. On the positive side, I think that jmp_buf has probably been
unchanged for a long time, and will remain so.
Jeff
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next prev parent reply other threads:[~2005-10-02 18:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-28 11:46 [uml-devel] Clearing kmalloc_ok during shutdown is broken - malloc will clear our data Blaisorblade
2005-09-28 20:12 ` Jeff Dike
2005-09-29 12:07 ` Blaisorblade
2005-09-28 21:31 ` Jeff Dike
2005-09-29 14:14 ` Blaisorblade
2005-10-02 1:08 ` Jeff Dike
2005-10-02 10:31 ` Blaisorblade
2005-10-02 18:27 ` Jeff Dike [this message]
2005-10-03 13:40 ` Allan Graves
2005-10-03 18:48 ` Blaisorblade
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