[PATCH 2/3] winebuild: Don't use iretq in syscall dispatcher.

[Jacek Caban]

On 6/3/21 6:00 PM, Zebediah Figura (she/her) wrote:
> On 6/3/21 10:56 AM, Zebediah Figura (she/her) wrote:
>> On 6/3/21 8:02 AM, Jacek Caban wrote:
>>>
>>> Signed-off-by: Jacek Caban <jacek at codeweavers.com>
>>> ---
>>>     tools/winebuild/import.c | 7 +++----
>>>     1 file changed, 3 insertions(+), 4 deletions(-)
>>>
>>>
>>
>> Wait, so what if %rflags or %cs is modified?
>
> Eh, never mind, I think I see the point here, shame on me for not 
> reading very well.
>
> I'm a bit confused now, though, how is patch 3/3 incorrect? 


Only XMM6-XMM15 are preserved, as required by usual calling convention 
requirements. The rest of FPU/YMM context is not preserved by the 'fast 
path'.


Jacek

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