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Re: [Xen-devel] Question re do_switch_stack()
| To: | Avi Kivity <avi.kivity@xxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Question re do_switch_stack() |
| From: | Kip Macy <kip.macy@xxxxxxxxx> |
| Date: | Thu, 9 Jun 2005 07:44:56 -0700 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 09 Jun 2005 14:44:06 +0000 |
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| Reply-to: | Kip Macy <kip.macy@xxxxxxxxx> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
The stack_switch you're looking at is for setting the trap stack. On 6/9/05, Avi Kivity <avi.kivity@xxxxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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