Re: [Xen-devel] Re: [PATCH] Fix debug exception stack to enable gdb on xeno64

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 12 Jul 2005, at 18:10, Andi Kleen wrote:

> Doesn't look correct to me. When you get an NMI or DB directly after
> a SYSCALL to Xen it'll execute on a random stack and likely break
> if the guest runs with a broken stack at that time.
>
> Also I can really recommend having IST stacks for double fault and 
> stack
> fault, otherwise everytime you break the stack you get a triple fault
> which are nasty to debug. You guys with target probes might not
> care that much, but others do.
The patch is for guest Linux. Xen itself does use IST stacks, just like 
native Linux.
 -- Keir


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