How does proot support sysexit processing when seccomp starts?

[w296488320]

                /* Restore tracee's stack pointer now if it won't hit
   * the sysexit stage (i.e. when seccomp is enabled and
   * there's nothing else to do). 
   *  */
  if (tracee->restart_how == PTRACE_CONT) {
   suppressed_syscall_status = tracee->status;
   tracee->status = 0;
   poke_reg(tracee, STACK_POINTER, peek_reg(tracee, ORIGINAL, STACK_POINTER));
   
  }

I don't know why in seccomp mode to put the ( tracee->status = 0;)
This may not execute sysexit. Does it not support sysexit when seccomp is enabled?

[fh2002]

PTRACE_SYSCALL