From: Kip Macy <kip.macy@gmail.com>
To: Avi Kivity <avi.kivity@qumranet.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: Question re do_switch_stack()
Date: Thu, 9 Jun 2005 07:44:56 -0700 [thread overview]
Message-ID: <b1fa29170506090744e0cdd2a@mail.gmail.com> (raw)
In-Reply-To: <1118328113.15004.28.camel@blast.qumranet.com>
The stack_switch you're looking at is for setting the trap stack.
On 6/9/05, Avi Kivity <avi.kivity@qumranet.com> wrote:
> looking at do_stack_switch() (x86-32), I see that the switch is effected
> by moving the new stack pointer into current->arch.kernel_sp. however,
> entry.S only looks at kernel_sp in create_bounce_frame, but only if
> we're not returning into ring 1.
>
> how then is the switch caused? obviously the call to do_stack_switch
> came from ring 1.
>
> confused,
> Avi
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>
next prev parent reply other threads:[~2005-06-09 14:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-09 14:41 Question re do_switch_stack() Avi Kivity
2005-06-09 14:44 ` Kip Macy [this message]
2005-06-09 15:22 ` Avi Kivity
2005-06-09 15:32 ` Keir Fraser
2005-06-09 15:51 ` Avi Kivity
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