Messages in this thread | | | Subject | Re: [Xen-devel] [PATCH] xen/x86: Adjust stack pointer in xen_sysexit | From | Boris Ostrovsky <> | Date | Tue, 17 Nov 2015 14:38:28 -0500 |
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On 11/17/2015 02:37 PM, Boris Ostrovsky wrote: > On 11/17/2015 02:16 PM, Andy Lutomirski wrote: >>>> Looks good to me. Does Xen have any sysexit/sysret32 equivalent to >>>> return to 32-bit user mode? If so, it could be worth trying to wire >>>> it up by patching the jz instead of the test instruction. > > We can actually make patching a little bit more efficient by replacing > the test instruction with 'xor %eax,%eax'. That way we won't need any > 'nop's.
Nevermind that, we are looking at flags, not register.
-boris
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