On Mon, Jun 08, 2020 at 11:14:54AM -0700, Brendan Shanks wrote: > Add emulation/spoofing of SLDT and STR for both 32- and 64-bit > processes. > > Wine users have found a small number of Windows apps using SLDT that > were crashing when run on UMIP-enabled systems. > > Reported-by: Andreas Rammhold <andi@notmuch.email> > Originally-by: Ricardo Neri <ricardo.neri-calde...@linux.intel.com> > Signed-off-by: Brendan Shanks <bsha...@codeweavers.com> > --- > > v2: Return (GDT_ENTRY_LDT * 8) for SLDT when an LDT is set. > > arch/x86/kernel/umip.c | 34 +++++++++++++++++++++++++--------- > 1 file changed, 25 insertions(+), 9 deletions(-) > > diff --git a/arch/x86/kernel/umip.c b/arch/x86/kernel/umip.c > index 8d5cbe1bbb3b..a85f0b0ec2b9 100644 > --- a/arch/x86/kernel/umip.c > +++ b/arch/x86/kernel/umip.c > @@ -64,6 +64,8 @@ > #define UMIP_DUMMY_GDT_BASE 0xfffffffffffe0000ULL > #define UMIP_DUMMY_IDT_BASE 0xffffffffffff0000ULL > > +#define UMIP_DUMMY_TASK_REGISTER_SELECTOR 0x40
One more thing. How was this value selected? Would it be possible to use GDT_ENTRY_TSS*8? Linux already uses this value. Thanks and BR, Ricardo
