Re: [PATCH for-4.19] x86/entry: don't clear DF when raising #UD for lack of syscall handler

2024-07-01 Thread Andrew Cooper
On 06/03/2024 1:44 pm, Jan Beulich wrote: > --- a/xen/arch/x86/x86_64/entry.S > +++ b/xen/arch/x86/x86_64/entry.S > @@ -47,12 +55,13 @@ UNLIKELY_START(z, syscall_no_callback) / > testb $4, X86_EXC_UD * TRAPINFO_sizeof + TRAPINFO_flags(%rdi) > setnz %cl > lea TBF_EXCEPTI

Re: [PATCH for-4.19] x86/entry: don't clear DF when raising #UD for lack of syscall handler

2024-07-02 Thread Oleksii
On Mon, 2024-07-01 at 16:35 +0100, Andrew Cooper wrote: > On 06/03/2024 1:44 pm, Jan Beulich wrote: > > --- a/xen/arch/x86/x86_64/entry.S > > +++ b/xen/arch/x86/x86_64/entry.S > > @@ -47,12 +55,13 @@ UNLIKELY_START(z, syscall_no_callback) / > > testb $4, X86_EXC_UD * TRAPINFO_sizeof + > >