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[Xen-ia64-devel] Strange code in ivt.S
| To: | Xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-ia64-devel] Strange code in ivt.S |
| From: | tgingold@xxxxxxx |
| Date: | Thu, 15 Feb 2007 17:39:53 +0100 |
| Delivery-date: | Thu, 15 Feb 2007 08:36:32 -0800 |
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Hi,
A few lines after ENTRY(break_fault), there is strange code (at least to me):
movl r18=THIS_CPU(current_psr_ic_addr)
;;
ld8 r18=[r18]
;;
cmp.eq p7,p0=r0,r17 // is this a psuedo-cover?
(p7) br.spnt.many dispatch_privop_fault
(r17 is cr.iim).
This seems buggy code related to old privify feature.
I think this creates garbage warning on the console when break 0 is
encountered in user code.
Tristan.
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