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283
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1 module syscall;
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2
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292
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3 /*
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4 This module handles all the system calls from user space.
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5 */
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6
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300
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7 /*
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292
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8 enum {
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9 SendMsg = 1,
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10 ReceiveMsg = 2,
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11
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12 } syscall_t;
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300
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13 */
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14
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15 type int syscall_t;
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283
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16
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17 // System call handlers. System calls are made from user space.
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300
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18 function void handle_system_call(int callId, int a, int b, int c, int d)
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292
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19 {
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20 // Main entry, check what to do here
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21 switch(callId)
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22 {
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23 case SendMsg:
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24 handle_send_msg();
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25 proc = process.byId(a);
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26 if (not proc)
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27 {
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28 panic();
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29 }
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283
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30
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292
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31 proc.setMessage();
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300
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32 // scheduler.current.setState(Sleep);
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292
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33 break;
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34 case ReceiveMsg:
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35 break;
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36 case Reboot:
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37 arch.reboot();
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38 break;
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39 default:
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40 return NO_SUCH_CALL;
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41 }
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42
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43 return OK;
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283
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44 }
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45
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292
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46 // Handle send message syscall
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47 func void handle_send_msg()
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48 {
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49 p = process.byId(msg.to_id);
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50 scheduler.attempt(p);
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51 }
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52
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53 func handle_recv_msg()
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54 {
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55 // Block until we have a message
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56 currentProc->setState(Sleep);
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57 scheduler.executeNext();
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58 }
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59
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60 func handle_reboot()
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61 {
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62 reboot();
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63 }
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64
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