}
                  break;
 
-       case PTRACE_SYSEMU: /* continue and stop at next syscall, which will not be executed */
-       case PTRACE_SYSCALL:    /* continue and stop at next (return from) syscall */
-       case PTRACE_CONT:       /* restart after signal. */
-               ret = -EIO;
-               if (!valid_signal(data))
-                       break;
-               if (request == PTRACE_SYSEMU) {
-                       set_tsk_thread_flag(child, TIF_SYSCALL_EMU);
-                       clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-               } else if (request == PTRACE_SYSCALL) {
-                       set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                       clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
-               } else {
-                       clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
-                       clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-               }
-               child->exit_code = data;
-               /* make sure the single step bit is not set. */
-               user_disable_single_step(child);
-               wake_up_process(child);
-               ret = 0;
-               break;
-
-/*
- * make the child exit.  Best I can do is send it a sigkill. 
- * perhaps it should be put in the status that it wants to 
- * exit.
- */
-       case PTRACE_KILL:
-               ret = 0;
-               if (child->exit_state == EXIT_ZOMBIE)   /* already dead */
-                       break;
-               child->exit_code = SIGKILL;
-               /* make sure the single step bit is not set. */
-               user_disable_single_step(child);
-               wake_up_process(child);
-               break;
-
-       case PTRACE_SYSEMU_SINGLESTEP: /* Same as SYSEMU, but singlestep if not syscall */
-       case PTRACE_SINGLESTEP: /* set the trap flag. */
-               ret = -EIO;
-               if (!valid_signal(data))
-                       break;
-
-               if (request == PTRACE_SYSEMU_SINGLESTEP)
-                       set_tsk_thread_flag(child, TIF_SYSCALL_EMU);
-               else
-                       clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
-
-               clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-               user_enable_single_step(child);
-               child->exit_code = data;
-               /* give it a chance to run. */
-               wake_up_process(child);
-               ret = 0;
-               break;
-
        case PTRACE_GETREGS: { /* Get all gp regs from the child. */
                if (!access_ok(VERIFY_WRITE, datap, FRAME_SIZE*sizeof(long))) {
                        ret = -EIO;