On Thursday, March 19, 2009 10:08 PM Lu, Guanqun wrote:
> Hi Jan,
>
> I saw that in patch 13252,
> you added such lines in xen/arch/x86/traps.c
>
> +#ifdef CONFIG_COMPAT
> + _set_tssldt_desc(
> + compat_gdt_table + __TSS(n) - FIRST_RESERVED_GDT_ENTRY,
> + (unsigned long)addr,
> + offsetof(struct tss_struct, __cacheline_filler) - 1,
> + 11);
> +#endif
>
> I have such question about the number 11, 11 is 1010 in binary format,
typo. 1011 ;-)
> which means that the busy flat is set. Then later, load_TR() is
> called. load_TR() is a wrapper around instruction 'ltr'. As I
> consult SDM2A, it says that ltr will generate #GP, when the busy flag
> is set.
>
> So I'm a little puzzled. Can you explain a little why it's not 9 ?
> Or am I missing something here?
>
> Thanks.
--
Guanqun _______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
Home