1 | /* |
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2 | * sys_timeofday.c - Get current time |
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3 | * |
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4 | * Author Alain Greiner (2016,2017,2018) |
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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_uspace.h> |
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26 | #include <thread.h> |
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27 | #include <printk.h> |
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28 | #include <errno.h> |
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29 | #include <process.h> |
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30 | #include <vmm.h> |
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31 | #include <core.h> |
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32 | #include <shared_syscalls.h> |
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33 | |
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34 | #include <syscalls.h> |
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35 | |
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36 | //////////////////////////////////////// |
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37 | int sys_timeofday( struct timeval * tv, |
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38 | struct timezone * tz ) |
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39 | { |
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40 | error_t error; |
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41 | vseg_t * vseg; |
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42 | |
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43 | uint32_t tm_s; |
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44 | uint32_t tm_us; |
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45 | |
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46 | struct timeval k_tv; |
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47 | |
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48 | thread_t * this = CURRENT_THREAD; |
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49 | process_t * process = this->process; |
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50 | |
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51 | // check tz (non supported / must be null) |
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52 | if( tz ) |
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53 | { |
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54 | |
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55 | #if DEBUG_SYSCALLS_ERROR |
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56 | printk("\n[ERROR] in %s for thread %x in process %x : tz argument must be NULL\n", |
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57 | __FUNCTION__ , this->trdid , process->pid ); |
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58 | #endif |
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59 | this->errno = EINVAL; |
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60 | return -1; |
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61 | } |
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62 | |
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63 | // check tv |
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64 | error = vmm_get_vseg( process , (intptr_t)tv , &vseg ); |
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65 | |
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66 | if( error ) |
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67 | { |
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68 | |
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69 | #if DEBUG_SYSCALLS_ERROR |
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70 | printk("\n[ERROR] in %s : user buffer tz unmapped / thread %x / process %x\n", |
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71 | __FUNCTION__ , (intptr_t)tz , this->trdid , process->pid ); |
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72 | vmm_display( process , false ); |
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73 | #endif |
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74 | this->errno = EINVAL; |
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75 | return -1; |
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76 | } |
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77 | |
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78 | // get time from calling core descriptor |
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79 | core_get_time( this->core , &tm_s , &tm_us ); |
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80 | k_tv.tv_sec = tm_s; |
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81 | k_tv.tv_usec = tm_us; |
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82 | |
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83 | // copy values to user space |
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84 | hal_copy_to_uspace( tv , &k_tv , sizeof(struct timeval) ); |
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85 | |
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86 | hal_fence(); |
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87 | |
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88 | return 0; |
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89 | |
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90 | } // end sys_timeofday() |
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