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ntdll: Fix compacted legacy xsave area handling. 

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2021-02-24 18:27:41 +01:00 committed by Alexandre Julliard
parent 7b95cdffa6
commit aae2e2adf0
1 changed files with 34 additions and 2 deletions
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36
dlls/ntdll/unix/signal_x86_64.c
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@ -1848,6 +1848,7 @@ NTSTATUS WINAPI NtSetContextThread( HANDLE handle, const CONTEXT *context )
if (flags & CONTEXT_FLOATING_POINT)
{
xsave->xsave = context->u.FltSave;
xsave->xstate.Mask |= XSTATE_MASK_LEGACY;
}
if (user_shared_data->XState.EnabledFeatures && (xs = xstate_from_context( context )))
{
@ -1941,8 +1942,39 @@ NTSTATUS WINAPI NtGetContextThread( HANDLE handle, CONTEXT *context )
}
if (needed_flags & CONTEXT_FLOATING_POINT)
{
context->u.FltSave = get_syscall_xsave(frame)->xsave;
context->MxCsr = context->u.FltSave.MxCsr;
struct syscall_xsave *xsave = get_syscall_xsave( frame );
if (!xstate_compaction_enabled ||
(xsave->xstate.Mask & XSTATE_MASK_LEGACY_FLOATING_POINT))
{
memcpy( &context->u.FltSave, &xsave->xsave, FIELD_OFFSET( XSAVE_FORMAT, MxCsr ));
memcpy( context->u.FltSave.FloatRegisters, xsave->xsave.FloatRegisters,
sizeof( context->u.FltSave.FloatRegisters ));
}
else
{
memset( &context->u.FltSave, 0, FIELD_OFFSET( XSAVE_FORMAT, MxCsr ));
memset( context->u.FltSave.FloatRegisters, 0,
sizeof( context->u.FltSave.FloatRegisters ));
context->u.FltSave.ControlWord = 0x37f;
}
if (!xstate_compaction_enabled || (xsave->xstate.Mask & XSTATE_MASK_LEGACY_SSE))
{
memcpy( context->u.FltSave.XmmRegisters, xsave->xsave.XmmRegisters,
sizeof( context->u.FltSave.XmmRegisters ));
context->u.FltSave.MxCsr = xsave->xsave.MxCsr;
context->u.FltSave.MxCsr_Mask = xsave->xsave.MxCsr_Mask;
}
else
{
memset( context->u.FltSave.XmmRegisters, 0,
sizeof( context->u.FltSave.XmmRegisters ));
context->u.FltSave.MxCsr = 0x1f80;
context->u.FltSave.MxCsr_Mask = 0x2ffff;
}
context->MxCsr = context->u.FltSave.MxCsr;
context->ContextFlags |= CONTEXT_FLOATING_POINT;
}
/* update the cached version of the debug registers */