annotate src/syscall.c @ 52:fa65b4f45366
picking this up again, let's fix it
| author |
John Tsiombikas <nuclear@member.fsf.org> |
| date |
Sun, 07 Aug 2011 06:42:00 +0300 |
| parents |
b1e8c8251884 |
| children |
4eaecb14fe31 |
| rev |
line source |
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1 #include <stdio.h>
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2 #include "syscall.h"
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3 #include "intr.h"
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4 #include "proc.h"
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5 #include "sched.h"
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6 #include "timer.h"
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7
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8 static int (*sys_func[NUM_SYSCALLS])();
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9
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10 static void syscall(int inum);
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11
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12 static int sys_exit(int status);
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13 static int sys_hello(void);
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14 static int sys_sleep(int sec);
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15
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16 void init_syscall(void)
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17 {
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18 sys_func[SYS_EXIT] = sys_exit;
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19 sys_func[SYS_HELLO] = sys_hello;
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20 sys_func[SYS_SLEEP] = sys_sleep;
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21
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22 interrupt(SYSCALL_INT, syscall);
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23 }
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24
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25 static void syscall(int inum)
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26 {
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27 struct intr_frame *frm;
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28 int idx;
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29
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30 frm = get_intr_frame();
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31 idx = frm->regs.eax;
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32
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33 if(idx < 0 || idx >= NUM_SYSCALLS) {
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34 printf("invalid syscall: %d\n", idx);
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35 return;
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36 }
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37
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38 frm->regs.eax = sys_func[idx](frm->regs.ebx, frm->regs.ecx, frm->regs.edx, frm->regs.esi, frm->regs.edi);
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39 schedule();
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40 }
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41
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42 static int sys_exit(int status)
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43 {
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44 return -1; /* not implemented yet */
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45 }
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46
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47 static int sys_hello(void)
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48 {
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49 /*printf("process %d says hello!\n", get_current_pid());*/
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50 return 0;
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51 }
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52
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53 static int sys_sleep(int sec)
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54 {
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55 int pid = get_current_pid();
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56 /*printf("process %d will sleep for %d sec\n", pid, sec);*/
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57 start_timer(sec * 1000, (timer_func_t)unblock_proc, (void*)pid);
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58 block_proc(pid);
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59 return 0;
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60 }
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