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89
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1 # xv6にsystem callを追加する
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2
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3 参考:
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4 https://www.geeksforgeeks.org/xv6-operating-system-adding-a-new-system-call/
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5
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6 ### syscall.cのsyscalls[]に追記
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7 ```
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8 [SYS_hoge] sys_hoge,
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9 ```
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10
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11 ### syscall.cにexternを追記
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12 ```
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13 extern uint64 sys_hoge(void);
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14 ```
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15
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16 ### syscall.hに追記
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17 ```
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18 #define SYS_hoge 22
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19 ```
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20
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21 ### sysproc.cに実装を追記
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22 ```
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23 uint64 sys_hoge(void)
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24 {
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25 return 1;
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26 }
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27 ```
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28
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29 ### user.hに追記
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30 ```
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31 int hoge(void);
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32 ```
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33
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34 ### usys.plに追記
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35 ```
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36 entry("hoge");
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37 ```
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38
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39 ### rebuild & run
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40
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41 ```
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42 $make clean
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43 $make qemu
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44 ```
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45
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46 if docker-compose
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47
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48 ```
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49 $docker-compose down
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50 $docker-compose build
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51 $docker-compose run --name xv6 xv6
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52 ```
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53
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54 # xv6にuser programを追加する
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55
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56 参考:
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57 https://www.geeksforgeeks.org/xv6-operating-system-add-a-user-program/
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58
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59 ### user/hoge.c(プログラム例)
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60 ```c
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61 #include "kernel/types.h"
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62 #include "kernel/stat.h"
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63 #include "user/user.h"
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64
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65 int main(int argc, char *argv[])
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66 {
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67 fprintf(1, "hogehoge\n");
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68 exit(0);
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69 }
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70 ```
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71
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72 ### MakefileのUPROGSに`$U/_hoge\`を追記
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73 ```
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74 UPROGS=\
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75 $U/_cat\
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76 $U/_echo\
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77 $U/_forktest\
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78 $U/_grep\
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79 $U/_init\
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80 $U/_kill\
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81 $U/_ln\
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82 $U/_ls\
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83 $U/_mkdir\
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84 $U/_rm\
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85 $U/_sh\
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86 $U/_stressfs\
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87 $U/_usertests\
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88 $U/_grind\
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89 $U/_wc\
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90 $U/_zombie\
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91 $U/_hoge\
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92 ```
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93
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94 ### rebuild & run
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95
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96 ```
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97 $make clean
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98 $make qemu
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99 ```
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100
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101 if docker-compose
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102
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103 ```
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104 $docker-compose down
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105 $docker-compose build
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106 $docker-compose run --name xv6 xv6
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107 ``` |
