Each process can only use SVCs which are enabled in the NCCH [https://github.com/3dshax/ctr/blob/master/ctrtool/exheader.c exheader] for this process. The ARM11 kernel SVC handler checks whether the SVC is enabled in the syscall access control mask stored on the SVC-mode stack. When a process context switch is done, the syscall mask is loaded from the KProcess object and is written to the SVC-mode stack.
Calling svcBreak on retail will only terminate the process which called this SVC.
Calling svcBreak on retail will only terminate the process which called this SVC.