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[Xen-devel] [Q] guest system call doesn't do do_iret() ?
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-devel] [Q] guest system call doesn't do do_iret() ? |
| From: | "Min Lee" <min.lee@xxxxxxxxxx> |
| Date: | Wed, 5 Dec 2007 23:22:51 -0500 |
| Delivery-date: | Wed, 05 Dec 2007 20:23:33 -0800 |
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Hello.Basically I'd like to intercept guest's (of course, Linux) system call entry/exit, so I've commented out fast path and I could intercept 'int 0x80' calls, and I expected every system call should call xen's do_iret() , i.e, HYPERVISOR_iret, but it doesn't seem that they call it ! Any idea or comments? What am I missing here? If the guest doesn't use HYPERVISOR_iret, how do they return to userland? Thanks in advance.Min _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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