From: Pavel Machek <pavel@suse.cz>
To: Andrea Arcangeli <andrea@suse.de>
Cc: kernel list <linux-kernel@vger.kernel.org>
Subject: Re: kernel_thread bogosity
Date: Sun, 26 Nov 2000 23:29:32 +0100 [thread overview]
Message-ID: <20001126232932.A4052@bug.ucw.cz> (raw)
In-Reply-To: <20001123232333.A6426@bug.ucw.cz> <20001124014830.I1461@athlon.random> <20001124205247.A141@bug.ucw.cz> <20001126172658.A5636@athlon.random>
In-Reply-To: <20001126172658.A5636@athlon.random>; from Andrea Arcangeli on Sun, Nov 26, 2000 at 05:26:58PM +0100
Hi!
> > How can that work? restore_args ends with iret, anyway, and iret does
> > reload esp afaics...
>
> ... only if there's an IPL change during the iret. Page 3-321 of 24319102.pdf
> from Intel:
>
> [..] If the return is to another privilege level, the IRET instruction
> also pops the stack pointer and SS from the stack, before resuming
> program execution. [..]
Is this different on x86-64 in long mode?
Pavel
--
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org
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next prev parent reply other threads:[~2000-11-26 23:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-11-23 22:23 kernel_thread bogosity Pavel Machek
2000-11-24 0:48 ` Andrea Arcangeli
2000-11-24 19:52 ` Pavel Machek
2000-11-26 16:26 ` Andrea Arcangeli
2000-11-26 22:29 ` Pavel Machek [this message]
2000-11-26 23:38 ` Andrea Arcangeli
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