[Bug 45573] New: League of Legends 8.12+ fails to start a game ( anticheat engine, hooking of syscall return instructions)

https://bugs.winehq.org/show_bug.cgi?id=45573

Bug ID: 45573
           Summary: League of Legends 8.12+ fails to start a game
                    (anticheat engine, hooking of syscall return
                    instructions)
           Product: Wine
           Version: 3.13
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Diagnosed by Andrew Wesie; partially split off from bug 45327.

The game expects to be able to hook both the first instruction of the syscall
and the last (return) instruction. The current staged implementation of the
syscall dispatcher does not return to the syscall thunk but rather directly to
its caller, which causes the game to fail.