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