1 | /* |
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2 | * do_syscall.c - architecture independant entry-point for system calls. |
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3 | * |
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4 | * Author Alain Greiner (2016) |
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5 | * |
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6 | * Copyright (c) UPMC Sorbonne Universites |
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7 | * |
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8 | * This file is part of ALMOS-MKH. |
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9 | * |
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10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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11 | * under the terms of the GNU General Public License as published by |
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12 | * the Free Software Foundation; version 2.0 of the License. |
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13 | * |
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14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 | * General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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22 | */ |
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23 | |
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24 | #include <hal_kernel_types.h> |
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25 | #include <hal_irqmask.h> |
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26 | #include <do_syscall.h> |
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27 | #include <errno.h> |
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28 | #include <thread.h> |
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29 | #include <printk.h> |
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30 | #include <syscalls.h> |
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31 | #include <shared_syscalls.h> |
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32 | |
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33 | /////////////////////////////////////////////////////////////////////////////////////// |
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34 | // This ƒonction should never be called... |
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35 | /////////////////////////////////////////////////////////////////////////////////////// |
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36 | static int sys_undefined() |
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37 | { |
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38 | assert( false , "undefined system call" ); |
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39 | return 0; |
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40 | } |
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41 | |
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42 | /////////////////////////////////////////////////////////////////////////////////////// |
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43 | // This array of pointers define the kernel functions implementing the syscalls. |
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44 | // It must be kept consistent with the enum in "shared_syscalls.h" file. |
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45 | /////////////////////////////////////////////////////////////////////////////////////// |
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46 | |
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47 | typedef int (*sys_func_t) (); |
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48 | |
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49 | static const sys_func_t syscall_tbl[SYSCALLS_NR] = |
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50 | { |
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51 | sys_thread_exit, // 0 |
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52 | sys_thread_yield, // 1 |
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53 | sys_thread_create, // 2 |
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54 | sys_thread_join, // 3 |
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55 | sys_thread_detach, // 4 |
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56 | sys_thread_cancel, // 5 |
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57 | sys_sem, // 6 |
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58 | sys_condvar, // 7 |
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59 | sys_barrier, // 8 |
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60 | sys_mutex, // 9 |
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61 | |
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62 | sys_exit, // 10 |
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63 | sys_munmap, // 11 |
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64 | sys_open, // 12 |
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65 | sys_mmap, // 13 |
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66 | sys_read, // 14 |
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67 | sys_write, // 15 |
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68 | sys_lseek, // 16 |
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69 | sys_close, // 17 |
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70 | sys_unlink, // 18 |
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71 | sys_pipe, // 19 |
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72 | |
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73 | sys_chdir, // 20 |
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74 | sys_mkdir, // 21 |
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75 | sys_mkfifo, // 22 |
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76 | sys_opendir, // 23 |
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77 | sys_readdir, // 24 |
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78 | sys_closedir, // 25 |
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79 | sys_getcwd, // 26 |
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80 | sys_isatty, // 27 |
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81 | sys_alarm, // 28 |
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82 | sys_rmdir, // 29 |
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83 | |
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84 | sys_utls, // 30 |
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85 | sys_chmod, // 31 |
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86 | sys_signal, // 32 |
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87 | sys_timeofday, // 33 |
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88 | sys_kill, // 34 |
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89 | sys_getpid, // 35 |
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90 | sys_fork, // 36 |
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91 | sys_exec, // 37 |
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92 | sys_stat, // 38 |
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93 | sys_wait, // 39 |
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94 | |
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95 | sys_get_config, // 40 |
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96 | sys_get_core, // 41 |
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97 | sys_get_cycle, // 42 |
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98 | sys_display, // 43 |
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99 | sys_undefined, // 44 |
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100 | sys_thread_sleep, // 45 |
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101 | sys_thread_wakeup, // 46 |
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102 | sys_trace, // 47 |
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103 | sys_fg, // 48 |
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104 | sys_is_fg, // 49 |
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105 | }; |
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106 | |
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107 | //////////////////////////////////// |
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108 | const char * syscall_str( uint32_t index ) |
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109 | { |
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110 | if ( index == SYS_THREAD_EXIT ) return "THREAD_EXIT"; // 0 |
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111 | else if( index == SYS_THREAD_YIELD ) return "THREAD_YIELD"; // 1 |
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112 | else if( index == SYS_THREAD_CREATE ) return "THREAD_CREATE"; // 2 |
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113 | else if( index == SYS_THREAD_JOIN ) return "THREAD_JOIN"; // 3 |
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114 | else if( index == SYS_THREAD_DETACH ) return "THREAD_DETACH"; // 4 |
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115 | else if( index == SYS_THREAD_CANCEL ) return "THREAD_CANCEL"; // 5 |
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116 | else if( index == SYS_SEM ) return "SEM"; // 6 |
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117 | else if( index == SYS_CONDVAR ) return "CONDVAR"; // 7 |
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118 | else if( index == SYS_BARRIER ) return "BARRIER"; // 8 |
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119 | else if( index == SYS_MUTEX ) return "MUTEX"; // 9 |
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120 | |
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121 | else if( index == SYS_EXIT ) return "EXIT"; // 10 |
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122 | else if( index == SYS_MUNMAP ) return "MUNMAP"; // 11 |
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123 | else if( index == SYS_OPEN ) return "OPEN"; // 12 |
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124 | else if( index == SYS_MMAP ) return "MMAP"; // 13 |
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125 | else if( index == SYS_READ ) return "READ"; // 14 |
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126 | else if( index == SYS_WRITE ) return "WRITE"; // 15 |
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127 | else if( index == SYS_LSEEK ) return "LSEEK"; // 16 |
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128 | else if( index == SYS_CLOSE ) return "CLOSE"; // 17 |
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129 | else if( index == SYS_UNLINK ) return "UNLINK"; // 18 |
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130 | else if( index == SYS_PIPE ) return "PIPE"; // 19 |
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131 | |
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132 | else if( index == SYS_CHDIR ) return "CHDIR"; // 20 |
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133 | else if( index == SYS_MKDIR ) return "MKDIR"; // 21 |
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134 | else if( index == SYS_MKFIFO ) return "MKFIFO"; // 22 |
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135 | else if( index == SYS_OPENDIR ) return "OPENDIR"; // 23 |
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136 | else if( index == SYS_READDIR ) return "READDIR"; // 24 |
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137 | else if( index == SYS_CLOSEDIR ) return "CLOSEDIR"; // 25 |
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138 | else if( index == SYS_GETCWD ) return "GETCWD"; // 26 |
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139 | else if( index == SYS_ISATTY ) return "ISATTY"; // 27 |
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140 | else if( index == SYS_ALARM ) return "ALARM"; // 28 |
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141 | else if( index == SYS_RMDIR ) return "RMDIR"; // 29 |
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142 | |
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143 | else if( index == SYS_UTLS ) return "UTLS"; // 30 |
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144 | else if( index == SYS_CHMOD ) return "CHMOD"; // 31 |
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145 | else if( index == SYS_SIGNAL ) return "SIGNAL"; // 32 |
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146 | else if( index == SYS_TIMEOFDAY ) return "TIMEOFDAY"; // 33 |
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147 | else if( index == SYS_KILL ) return "KILL"; // 34 |
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148 | else if( index == SYS_GETPID ) return "GETPID"; // 35 |
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149 | else if( index == SYS_FORK ) return "FORK"; // 36 |
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150 | else if( index == SYS_EXEC ) return "EXEC"; // 37 |
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151 | else if( index == SYS_STAT ) return "STAT"; // 38 |
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152 | else if( index == SYS_WAIT ) return "WAIT"; // 39 |
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153 | |
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154 | else if( index == SYS_GET_CONFIG ) return "GET_CONFIG"; // 40 |
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155 | else if( index == SYS_GET_CORE ) return "GET_CORE"; // 41 |
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156 | else if( index == SYS_GET_CYCLE ) return "GET_CYCLE"; // 42 |
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157 | else if( index == SYS_DISPLAY ) return "DISPLAY"; // 43 |
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158 | else if( index == SYS_THREAD_SLEEP ) return "THREAD_SLEEP"; // 45 |
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159 | else if( index == SYS_THREAD_WAKEUP ) return "THREAD_WAKEUP"; // 46 |
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160 | else if( index == SYS_TRACE ) return "TRACE"; // 47 |
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161 | else if( index == SYS_FG ) return "FG"; // 48 |
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162 | else if( index == SYS_IS_FG ) return "IS_FG"; // 49 |
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163 | |
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164 | else return "undefined"; |
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165 | } |
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166 | |
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167 | |
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168 | ////////////////////////////////// |
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169 | reg_t do_syscall( thread_t * this, |
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170 | reg_t arg0, |
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171 | reg_t arg1, |
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172 | reg_t arg2, |
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173 | reg_t arg3, |
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174 | reg_t service_num ) |
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175 | { |
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176 | int error = 0; |
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177 | |
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178 | assert( (this == CURRENT_THREAD), |
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179 | "wrong <this> argument\n" ); |
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180 | |
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181 | // update user time |
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182 | thread_time_update( this , 1 ); |
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183 | |
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184 | // check syscall index |
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185 | if( service_num >= SYSCALLS_NR ) |
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186 | { |
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187 | printk("\n[ERROR] in %s : Undefined syscall %d, for thread %x\n", |
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188 | __FUNCTION__ , service_num , this ); |
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189 | |
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190 | this->errno = ENOSYS; |
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191 | hal_disable_irq(NULL); |
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192 | return ENOSYS;; |
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193 | } |
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194 | |
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195 | // reset errno |
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196 | this->errno = 0; |
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197 | |
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198 | // call relevant kernel function |
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199 | error = syscall_tbl[service_num] ( arg0 , arg1 , arg2 , arg3 ); |
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200 | |
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201 | // check kernel stack overflow |
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202 | assert( (CURRENT_THREAD->signature == THREAD_SIGNATURE), |
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203 | "kernel stack overflow after for thread %x in cluster %x\n", CURRENT_THREAD, local_cxy ); |
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204 | |
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205 | // update kernel time |
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206 | thread_time_update( this , 0 ); |
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207 | |
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208 | return error; |
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209 | } |
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