[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] do_iret bug in xen
yeah but the do_iret function is done on behalf of a guest, therefore do_iret function forces user cs and user ss code excerpt " regs->rip = iret_saved.rip; regs->cs = iret_saved.cs | 3; /* force guest privilege */ regs->rflags = (iret_saved.rflags & ~(EF_IOPL|EF_VM)) | EF_IE; regs->rsp = iret_saved.rsp; regs->ss = iret_saved.ss | 3; /* force guest privilege */ " this can cause ret_from_intr go to test_all_events and finally go to __enter_scheduler -a On Nov 27, 2007 6:17 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
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