[PATCH 1/3] ntdll: Introduce syscall_exit_full_restore and use it when x86_64 syscall frame is modified.
Jacek Caban
jacek at codeweavers.com
Thu Jun 3 08:01:43 CDT 2021
Signed-off-by: Jacek Caban <jacek at codeweavers.com>
---
This patch series makes syscall dispatcher overhead over 2.5 smaller in
my testing. It will matter more than now when we will use syscall
interface for other modules like winepulse does.
The last patch is may be a bit controversial because is makes us less
compatible with Windows (through I'm not aware of an application
depending on that). If we don't want that, we could potentially
introduce 'fast path' only for __wine_unix_call syscall. Such
specialized fast path could probably also skip xsave, but I'm not sure
that's worth it (and having proper ntdll syscalls faster is nice anyway).
dlls/ntdll/unix/signal_x86_64.c | 124 ++++++++++++++++++++------------
tools/winebuild/import.c | 6 +-
2 files changed, 84 insertions(+), 46 deletions(-)
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