[1] | 1 | /* |
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[407] | 2 | * syscalls.h - Kernel side services for syscall handling. |
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[1] | 3 | * |
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[23] | 4 | * Author Alain Greiner (2016,2017) |
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[1] | 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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[16] | 24 | #ifndef _SYSCALLS_H_ |
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| 25 | #define _SYSCALLS_H_ |
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[1] | 26 | |
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[23] | 27 | #include <hal_types.h> |
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[407] | 28 | #include <shared_syscalls.h> |
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[23] | 29 | |
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[407] | 30 | /** Forward declarations *****/ |
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[23] | 31 | |
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| 32 | struct thread_s; // defined in thread.h |
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| 33 | struct pthread_attr_s; // defined in thread.h |
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| 34 | struct vfs_stat_s; // defined in vfs.h |
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| 35 | struct vfs_dirent_s; // defined in vfs.h |
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| 36 | struct mmap_attr_s; // defined in vmm.h |
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| 37 | |
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[407] | 38 | /****************************************************************************************** |
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| 39 | * [0] This function terminates the execution of the calling user thread, |
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[23] | 40 | * and makes the exit_value pointer available to any successful pthread_join() with the |
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| 41 | * terminating thread. |
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[409] | 42 | * It actually set the THREAD_SIG_EXIT signal, set the THREAD_BLOCKED_GLOBAL bit in the |
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| 43 | * thread descriptor and deschedule. |
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| 44 | * The thread will be detached from its process, and the memory allocated to the thread |
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| 45 | * descriptor will be released later by the scheduler. |
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[407] | 46 | ****************************************************************************************** |
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[409] | 47 | * @ exit_vallue : pointer to be returned to joining thread if thread is attached. |
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| 48 | * @ return 0 if success / return -1 if all locks not released or illegal argument. |
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[407] | 49 | *****************************************************************************************/ |
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[23] | 50 | int sys_thread_exit( void * exit_value ); |
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[16] | 51 | |
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[407] | 52 | /****************************************************************************************** |
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| 53 | * [1] This function calls the scheduler for the core running the calling thread. |
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| 54 | ****************************************************************************************** |
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| 55 | * @ x_size : [out] number of clusters in a row. |
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| 56 | * @ y_size : [out] number of clusters in a column. |
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| 57 | * @ ncores : [out] number of cores per cluster. |
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| 58 | * @ return always 0. |
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| 59 | *****************************************************************************************/ |
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| 60 | int sys_thread_yield(); |
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[16] | 61 | |
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[407] | 62 | /****************************************************************************************** |
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[23] | 63 | * [2] This function creates a new user thread. The <user_attr> argument is a pointer |
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| 64 | * on astructure containing the thread attributes, defined in thread.h file. |
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[407] | 65 | ****************************************************************************************** |
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[23] | 66 | * @ new_thread : [out] local pointer on created thread descriptor. |
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| 67 | * @ user_attr : [in] pointer on thread attributes structure. |
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| 68 | * @ start_func : [in] pointer on start function. |
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| 69 | * @ start_args : [in] pointer on start function arguments. |
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| 70 | * @ return 0 if success / return -1 if failure. |
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[407] | 71 | *****************************************************************************************/ |
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[23] | 72 | int sys_thread_create( struct thread_s * new_thread, |
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| 73 | struct pthread_attr_s * user_attr, |
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| 74 | void * start_func, |
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| 75 | void * start_args ); |
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[16] | 76 | |
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[407] | 77 | /****************************************************************************************** |
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[23] | 78 | * [3] This blocking function suspend execution of the calling thread until completion |
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| 79 | * of another target thread identified by the <trdid> argument. |
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| 80 | * If the <exit_value> argument is not NULL, the value passed to pthread_exit() by the |
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| 81 | * target thread is stored in the location referenced by exit_value. |
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[407] | 82 | ****************************************************************************************** |
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[23] | 83 | * @ trdid : [in] target thread identifier. |
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| 84 | * @ thread : [out] buffer for exit_value returned by target thread. |
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| 85 | * @ return 0 if success / return -1 if failure. |
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[407] | 86 | *****************************************************************************************/ |
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[23] | 87 | int sys_thread_join( trdid_t trdid, |
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| 88 | void ** exit_value ); |
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[16] | 89 | |
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[407] | 90 | /****************************************************************************************** |
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[23] | 91 | * [4] This function detach a joinable thread. |
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[407] | 92 | ****************************************************************************************** |
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[409] | 93 | * @ trdid : thread identifier. |
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[23] | 94 | * @ return 0 if success / return -1 if failure. |
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[407] | 95 | *****************************************************************************************/ |
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[23] | 96 | int sys_thread_detach( trdid_t trdid ); |
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[16] | 97 | |
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[407] | 98 | /****************************************************************************************** |
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[409] | 99 | * [5] This function requests a target thread identified by its <trdid> argument |
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| 100 | * to be cancelled. Depending on killer thread and target thread location, it calls |
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| 101 | * the thread_kil() function or the rpc_thread_kill_client() function to do the work. |
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| 102 | * It actually set the THREAD_SIG_KILL signal, set the THREAD_BLOCKED_GLOBAL bit in the |
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| 103 | * target thread descriptor and return. |
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| 104 | * The thread will be detached from its process, and the memory allocated to the thread |
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| 105 | * descriptor will be released later by the scheduler. |
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| 106 | ****************************************************************************************** |
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| 107 | * @ trdid : thread identifier. |
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| 108 | * @ return 0 if success / return -1 if illegal argument. |
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[407] | 109 | *****************************************************************************************/ |
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[409] | 110 | int sys_thread_cancel( trdid_t trdid ); |
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[16] | 111 | |
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[407] | 112 | /****************************************************************************************** |
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[23] | 113 | * [6] This function implement all operations on a POSIX unnamed semaphore, |
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| 114 | * that can be shared by threads running in different clusters. |
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| 115 | * The kernel structure representing a remote semaphore is in the remote_sem.h file, |
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| 116 | * and the code implementing the operations is in the remore_sem.c file. |
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[407] | 117 | ****************************************************************************************** |
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[23] | 118 | * @ vaddr : semaphore virtual address in user space == identifier. |
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| 119 | * @ operation : SEM_INIT / SEM_DESTROY / SEM_GETVALUE / SEM_POST / SEM_WAIT. |
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| 120 | * @ value : pointer on in/out argument in user space. |
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| 121 | * @ return 0 if success / return -1 if failure. |
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[407] | 122 | *****************************************************************************************/ |
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[23] | 123 | int sys_sem( void * vaddr, |
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| 124 | uint32_t operation, |
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| 125 | uint32_t * value ); |
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[16] | 126 | |
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[407] | 127 | /****************************************************************************************** |
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[23] | 128 | * [7] This function implement all operations on a POSIX condition variable. |
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| 129 | * The kernel structure representing a cond_var is defined in the remote_cv.h file, |
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| 130 | * The code implementing the operations is defined in the remote_cv.c file. |
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[407] | 131 | ****************************************************************************************** |
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[23] | 132 | * @ vaddr : condvar virtual address in user space == identifier. |
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| 133 | * @ operation : operation type (see below). |
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| 134 | * @ attr : mutex virtual address in user space == identifier. |
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| 135 | * @ return 0 if success / return -1 if failure. |
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[407] | 136 | *****************************************************************************************/ |
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[23] | 137 | int sys_condvar( void * condvar, |
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| 138 | uint32_t operation, |
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| 139 | void * mutex ); |
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[16] | 140 | |
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[407] | 141 | /****************************************************************************************** |
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[23] | 142 | * [8] This function implement all operations on a POSIX barrier. |
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| 143 | * The kernel structure representing a barrier is defined in the remote_barrier.h file. |
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| 144 | * The code implementting the operations is defined in the remote_barrier.c file. |
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[407] | 145 | ****************************************************************************************** |
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[23] | 146 | * @ vaddr : barrier virtual address in user space == identifier. |
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| 147 | * @ operation : BARRIER_INIT / BARRIER_DESTROY / BARRIER_WAIT. |
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| 148 | * @ count : number of expected threads (only used by BARRIER_INIT operation). |
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| 149 | * @ return 0 if success / return -1 if failure. |
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[407] | 150 | *****************************************************************************************/ |
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[23] | 151 | int sys_barrier( void * vaddr, |
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| 152 | uint32_t operation, |
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| 153 | uint32_t count ); |
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[16] | 154 | |
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[407] | 155 | /****************************************************************************************** |
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[23] | 156 | * [9] This function implement all operations on a POSIX mutex. |
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| 157 | * The kernel structure representing a barrier is defined in the remote_barrier.h file. |
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| 158 | * The code implementting the operations is defined in the remote_barrier.c file. |
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[407] | 159 | ****************************************************************************************** |
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[23] | 160 | * @ vaddr : mutex virtual address in user space == identifier. |
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| 161 | * @ operation : MUTEX_INIT / MUTEX_DESTROY / MUTEX_LOCK / MUTEX_UNLOCK |
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| 162 | * @ attr : mutex attributes (non supported yet => must be 0). |
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| 163 | * @ return 0 if success / return -1 if failure. |
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[407] | 164 | *****************************************************************************************/ |
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[23] | 165 | int sys_mutex( void * vaddr, |
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| 166 | uint32_t operation, |
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| 167 | uint32_t count ); |
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[16] | 168 | |
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[407] | 169 | /****************************************************************************************** |
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[408] | 170 | * [10] This function implement the exit system call terminating a POSIX process. |
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[407] | 171 | ****************************************************************************************** |
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[408] | 172 | * @ status : terminaison status (not used in present implementation). |
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[407] | 173 | *****************************************************************************************/ |
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[409] | 174 | int sys_exit( uint32_t status ); |
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[16] | 175 | |
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[407] | 176 | /****************************************************************************************** |
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[408] | 177 | * [11] This function remove an existing mapping defined by the <addr> and <size> |
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[407] | 178 | * arguments in user space. |
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| 179 | ****************************************************************************************** |
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| 180 | * @ addr : base address in user space. |
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| 181 | * # size : number of bytes. |
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[23] | 182 | * @ return 0 if success / return -1 if failure. |
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[407] | 183 | *****************************************************************************************/ |
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| 184 | int sys_munmap( void * addr, |
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| 185 | uint32_t size ); |
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[16] | 186 | |
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[407] | 187 | /****************************************************************************************** |
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| 188 | * [12] This function open or create an open file descriptor. |
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| 189 | ****************************************************************************************** |
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[23] | 190 | * @ pathname : pathname (can be relative or absolute). |
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| 191 | * @ flags : bit vector attributes (see below). |
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| 192 | * @ mode : access rights. |
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| 193 | * @ return file descriptor index in fd_array if success / return -1 if failure. |
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[407] | 194 | *****************************************************************************************/ |
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[23] | 195 | int sys_open( char * pathname, |
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| 196 | uint32_t flags, |
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| 197 | uint32_t mode ); |
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[16] | 198 | |
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[407] | 199 | /****************************************************************************************** |
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| 200 | * [13] This function map physical memory (or a file) in the calling thread virtual space. |
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| 201 | * The <attr> argument is a pointer on a structure for arguments (see shared_syscalls.h). |
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| 202 | ****************************************************************************************** |
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| 203 | * @ attr : pointer on attributes structure. |
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| 204 | * @ return 0 if success / return -1 if failure. |
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| 205 | *****************************************************************************************/ |
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| 206 | int sys_mmap( mmap_attr_t * attr ); |
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[23] | 207 | |
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[407] | 208 | /****************************************************************************************** |
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[23] | 209 | * [14] This function read bytes from an open file identified by its file descriptor. |
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[407] | 210 | * The file can be a regular file or character oriented device. |
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[408] | 211 | * IRQs are enabled during this system call. |
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[407] | 212 | ****************************************************************************************** |
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[23] | 213 | * @ file_id : open file index in fd_array. |
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| 214 | * @ buf : buffer virtual address in user space. |
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| 215 | * @ count : number of bytes. |
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| 216 | * @ return number of bytes actually read if success / returns -1 if failure. |
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[407] | 217 | *****************************************************************************************/ |
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[23] | 218 | int sys_read( uint32_t file_id, |
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| 219 | void * buf, |
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| 220 | uint32_t count ); |
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[16] | 221 | |
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[407] | 222 | /****************************************************************************************** |
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[23] | 223 | * [15] This function writes bytes to an open file identified by its file descriptor. |
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[407] | 224 | * The file can be a regular file or character oriented device. |
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[408] | 225 | * IRQs are enabled during this system call. |
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[407] | 226 | ****************************************************************************************** |
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[23] | 227 | * @ file_id : open file index in fd_array. |
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| 228 | * @ buf : buffer virtual address in user space. |
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| 229 | * @ count : number of bytes. |
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| 230 | * @ return number of bytes actually written if success / returns -1 if failure. |
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[407] | 231 | *****************************************************************************************/ |
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[23] | 232 | int sys_write( uint32_t file_id, |
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| 233 | void * buf, |
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| 234 | uint32_t count ); |
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[16] | 235 | |
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[407] | 236 | /****************************************************************************************** |
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| 237 | * [16] This function repositions the offset of the file descriptor identified by <file_id>, |
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| 238 | * according to the operation type defined by the <whence> argument. |
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| 239 | ****************************************************************************************** |
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[23] | 240 | * @ file_id : open file index in fd_array. |
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[407] | 241 | * @ offset : used to compute new offset value. |
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[23] | 242 | * @ whence : operation type (see below). |
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| 243 | * @ return 0 if success / returns -1 if failure. |
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[407] | 244 | *****************************************************************************************/ |
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[23] | 245 | int sys_lseek( xptr_t file_id, |
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| 246 | uint32_t offset, |
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| 247 | uint32_t whence ); |
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[16] | 248 | |
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[407] | 249 | /****************************************************************************************** |
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[23] | 250 | * [17] This function release the memory allocated for the file descriptor identified by |
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| 251 | * the <file_id> argument, and remove the fd array_entry in all copies of the process |
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| 252 | * descriptor. |
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[407] | 253 | ****************************************************************************************** |
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[23] | 254 | file_id : file descriptor index in fd_array. |
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| 255 | * @ return 0 if success / returns -1 if failure. |
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[407] | 256 | *****************************************************************************************/ |
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[23] | 257 | int sys_close( uint32_t file_id ); |
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[16] | 258 | |
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[407] | 259 | /****************************************************************************************** |
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| 260 | * [18] This function removes a directory entry identified by the <pathname> from the |
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[23] | 261 | * directory, and decrement the link count of the file referenced by the link. |
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| 262 | * If the link count reduces to zero, and no process has the file open, then all resources |
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| 263 | * associated with the file are reclaimed. If one or more process have the file open when |
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| 264 | * the last link is removed, the link is removed, but the removal of the file is delayed |
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| 265 | * until all references to it have been closed. |
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[407] | 266 | ****************************************************************************************** |
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[23] | 267 | * @ pathname : pathname (can be relative or absolute). |
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| 268 | * @ return 0 if success / returns -1 if failure. |
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[407] | 269 | *****************************************************************************************/ |
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[23] | 270 | int sys_unlink( char * pathname ); |
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[16] | 271 | |
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[407] | 272 | /****************************************************************************************** |
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[23] | 273 | * [19] This function creates in the calling thread cluster an unnamed pipe, and two |
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| 274 | * (read and write) file descriptors. |
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[407] | 275 | * TODO not implemented yet... |
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| 276 | ****************************************************************************************** |
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[23] | 277 | * @ file_id[0] : [out] read only file descriptor index. |
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| 278 | * @ file_id[1] : [out] write only file descriptor index. |
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| 279 | * @ return 0 if success / return -1 if failure. |
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[407] | 280 | *****************************************************************************************/ |
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[23] | 281 | int sys_pipe( uint32_t file_id[2] ); |
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[16] | 282 | |
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[407] | 283 | /****************************************************************************************** |
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[23] | 284 | * [20] This function change the current working directory in reference process descriptor. |
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[407] | 285 | ****************************************************************************************** |
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[23] | 286 | * @ pathname : pathname (can be relative or absolute). |
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| 287 | * @ return 0 if success / returns -1 if failure. |
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[407] | 288 | *****************************************************************************************/ |
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[23] | 289 | int sys_chdir( char * pathname ); |
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[16] | 290 | |
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[407] | 291 | /****************************************************************************************** |
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[23] | 292 | * [21] This function creates a new directory in file system. |
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[407] | 293 | ****************************************************************************************** |
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[23] | 294 | * @ pathname : pathname (can be relative or absolute). |
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| 295 | * @ mode : access rights (as defined in chmod). |
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| 296 | * @ return 0 if success / returns -1 if failure. |
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[407] | 297 | *****************************************************************************************/ |
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[279] | 298 | int sys_mkdir( char * pathname, |
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[23] | 299 | uint32_t mode ); |
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[16] | 300 | |
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[407] | 301 | /****************************************************************************************** |
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[23] | 302 | * [22] This function creates a named FIFO file in the calling thread cluster. |
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| 303 | * The associated read and write file descriptors mut be be explicitely created |
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[407] | 304 | * using the sys_open() function. |
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| 305 | ****************************************************************************************** |
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[23] | 306 | * @ pathname : pathname (can be relative or absolute). |
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| 307 | * @ mode : access rights (as defined in chmod). |
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| 308 | * @ return 0 if success / returns -1 if failure. |
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[407] | 309 | *****************************************************************************************/ |
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[23] | 310 | int sys_mkfifo( char * pathname, |
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| 311 | uint32_t mode ); |
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[16] | 312 | |
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[407] | 313 | /****************************************************************************************** |
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| 314 | * [23] This function open a directory, that must exist in the file system, returning |
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| 315 | * a DIR pointer on the directory in user space. |
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| 316 | ****************************************************************************************** |
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[23] | 317 | * @ pathname : pathname (can be relative or absolute). |
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[407] | 318 | * @ dirp : [out] buffer for pointer on user directory (DIR). |
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[23] | 319 | * @ return 0 if success / returns -1 if failure. |
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[407] | 320 | *****************************************************************************************/ |
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| 321 | int sys_opendir( char * pathname, |
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| 322 | DIR ** dirp ); |
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[16] | 323 | |
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[407] | 324 | /****************************************************************************************** |
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| 325 | * [24] This function returns an user pointer on the dirent structure describing the |
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| 326 | * next directory entry in the directory identified by the <dirp> argument. |
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| 327 | ****************************************************************************************** |
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| 328 | * @ dirp : user pointer identifying the searched directory. |
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| 329 | * @ dentp : [out] buffer for pointer on user direntory entry (dirent). |
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| 330 | * @ return O if success / returns -1 if failure. |
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| 331 | *****************************************************************************************/ |
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| 332 | int sys_readdir( DIR * dirp, |
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| 333 | struct dirent ** dentp ); |
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| 334 | |
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| 335 | /****************************************************************************************** |
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| 336 | * [25] This function closes the directory identified by the <dirp> argument, and releases |
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| 337 | * all structures associated with the <dirp> pointer. |
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| 338 | ****************************************************************************************** |
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| 339 | * @ dirp : user pointer identifying the directory. |
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[23] | 340 | * @ return 0 if success / returns -1 if failure. |
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[407] | 341 | *****************************************************************************************/ |
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| 342 | int sys_closedir( DIR * dirp ); |
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[16] | 343 | |
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[407] | 344 | /****************************************************************************************** |
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[23] | 345 | * [26] This function returns the pathname of the current working directory. |
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[407] | 346 | ****************************************************************************************** |
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[23] | 347 | * buf : buffer addres in user space. |
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| 348 | * nbytes : user buffer size in bytes. |
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| 349 | * @ return 0 if success / returns -1 if failure. |
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[407] | 350 | *****************************************************************************************/ |
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[23] | 351 | int sys_getcwd( char * buf, |
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| 352 | uint32_t nbytes ); |
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[16] | 353 | |
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[407] | 354 | /****************************************************************************************** |
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| 355 | * [27] This slot is not used. |
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| 356 | *****************************************************************************************/ |
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[16] | 357 | |
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[407] | 358 | /****************************************************************************************** |
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[23] | 359 | * [28] This function forces the calling thread to sleep, for a fixed number of cycles. |
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[407] | 360 | ****************************************************************************************** |
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[23] | 361 | * cycles : number of cycles. |
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[407] | 362 | *****************************************************************************************/ |
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[23] | 363 | int sys_alarm( uint32_t cycles ); |
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[16] | 364 | |
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[407] | 365 | /****************************************************************************************** |
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| 366 | * [29] This function removes a directory file whose name is given by <pathname>. |
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| 367 | * The directory must not have any entries other than `.' and `..'. |
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| 368 | ****************************************************************************************** |
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[23] | 369 | * @ pathname : pathname (can be relative or absolute). |
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| 370 | * @ return 0 if success / returns -1 if failure. |
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[407] | 371 | *****************************************************************************************/ |
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[23] | 372 | int sys_rmdir( char * pathname ); |
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[16] | 373 | |
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[407] | 374 | /****************************************************************************************** |
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[23] | 375 | * [30] This function implement the operations related to User Thread Local Storage. |
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| 376 | * It is actually implemented as an uint32_t variable in the thread descriptor. |
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[407] | 377 | ****************************************************************************************** |
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[23] | 378 | * @ operation : UTLS operation type as defined below. |
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| 379 | * @ value : argument value for the UTLS_SET operation. |
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| 380 | * @ return value for the UTLS_GET and UTLS_GET_ERRNO / return -1 if failure. |
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[407] | 381 | *****************************************************************************************/ |
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[23] | 382 | int sys_utls( uint32_t operation, |
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| 383 | uint32_t value ); |
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[16] | 384 | |
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[407] | 385 | /****************************************************************************************** |
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[23] | 386 | * [31] This function change the acces rights for the file/dir identified by the |
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| 387 | * pathname argument. |
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[407] | 388 | ****************************************************************************************** |
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[23] | 389 | * @ pathname : pathname (can be relative or absolute). |
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| 390 | * @ rights : acces rights. |
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| 391 | * @ return 0 if success / returns -1 if failure. |
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[407] | 392 | *****************************************************************************************/ |
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[23] | 393 | int sys_chmod( char * pathname, |
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| 394 | uint32_t rights ); |
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[16] | 395 | |
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[407] | 396 | /****************************************************************************************** |
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[23] | 397 | * [32] This function associate a specific signal handler to a given signal type. |
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| 398 | * Tee handlers for the SIGKILL and SIGSTOP signals cannot be redefined. |
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[407] | 399 | ****************************************************************************************** |
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[23] | 400 | * @ sig_id : index defining signal type (from 1 to 31). |
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| 401 | * @ handler : pointer on fonction implementing the specific handler. |
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| 402 | * @ return 0 if success / returns -1 if failure. |
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[407] | 403 | *****************************************************************************************/ |
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[23] | 404 | int sys_signal( uint32_t sig_id, |
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| 405 | void * handler ); |
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[16] | 406 | |
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[407] | 407 | /****************************************************************************************** |
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[23] | 408 | * [33] This function returns in the structure <tv>, defined in the time.h file, |
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| 409 | * the current time (in seconds & micro-seconds). |
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| 410 | * It is computed from the calling core descriptor. |
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| 411 | * The timezone is not supported. |
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[407] | 412 | ****************************************************************************************** |
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[23] | 413 | * @ tv : pointer on the timeval structure. |
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| 414 | * @ tz : pointer on the timezone structure : must be NULL. |
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| 415 | * @ return 0 if success / returns -1 if failure. |
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[407] | 416 | *****************************************************************************************/ |
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[50] | 417 | int sys_timeofday( struct timeval * tv, |
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| 418 | struct timezone * tz ); |
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[16] | 419 | |
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[407] | 420 | /****************************************************************************************** |
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[16] | 421 | * [34] This function implements the "kill" system call. |
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[23] | 422 | * It register the signal defined by the <sig_id> argument in all thread descriptors |
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| 423 | * of a target process identified by the <pid> argument. This is done in all clusters |
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| 424 | * containing threads for the target process. |
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| 425 | * It can be executed by any thread running in any cluster, as this function uses |
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[407] | 426 | * remote access to traverse the list of process copies stored in the owner cluster, |
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[23] | 427 | * and the RPC_SIGNAL_RISE to signal the remote threads. |
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[407] | 428 | ****************************************************************************************** |
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[16] | 429 | * @ pid : target process identifier. |
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[23] | 430 | * @ sig_id : index defining the signal type (from 1 to 31). |
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| 431 | * @ return 0 if success / returns -1 if failure. |
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[407] | 432 | *****************************************************************************************/ |
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[16] | 433 | int sys_kill( pid_t pid, |
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[23] | 434 | uint32_t sig_id ); |
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[16] | 435 | |
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[407] | 436 | /****************************************************************************************** |
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[23] | 437 | * [35] This function implements the "getpid" system call. |
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[407] | 438 | ****************************************************************************************** |
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| 439 | * @ returns the process PID for the calling thread. |
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| 440 | *****************************************************************************************/ |
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[1] | 441 | int sys_getpid(); |
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| 442 | |
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[407] | 443 | /****************************************************************************************** |
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[16] | 444 | * [36] This function implement the "fork" system call. |
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[1] | 445 | * The calling process descriptor (parent process), and the associated thread descriptor are |
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| 446 | * replicated in the same cluster as the calling thread, but the new process (child process) |
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[23] | 447 | * is registered in another target cluster, that is the new process owner. |
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[1] | 448 | * The child process and the associated main thread will be migrated to the target cluster |
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[407] | 449 | * later, when the child process makes an "exec" or any other system call... TODO [AG] |
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[1] | 450 | * The target cluster depends on the "fork_user" flag and "fork_cxy" variable that can be |
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| 451 | * stored in the calling thread descriptor by the specific fork_place() system call. |
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| 452 | * If not, the sys_fork() function makes a query to the DQDT to select the target cluster. |
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[407] | 453 | ****************************************************************************************** |
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| 454 | * @ if success, returns child process PID to parent, and return O to child. |
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| 455 | * @ if failure, returns -1 to parent / no child process is created. |
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| 456 | *****************************************************************************************/ |
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[1] | 457 | int sys_fork(); |
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| 458 | |
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[407] | 459 | /****************************************************************************************** |
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| 460 | * [37] This function implement the "exec" system call, that creates a new process |
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| 461 | * descriptor. |
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| 462 | * It is executed in the client cluster, but the new process descriptor and the main |
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| 463 | * thread are created in a server cluster, that is generally another cluster. |
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| 464 | * - if the server_cluster is the client cluster, it calls directly the process_make_exec() |
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[23] | 465 | * function to create a new process, and launch a new thread in local cluster. |
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[407] | 466 | * - if the target_cluster is remote, it calls the rpc_process_exec_client() to execute |
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| 467 | * process_signedmake_exec() on the remote cluster. |
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[1] | 468 | * In both case this function build an exec_info_t structure containing all informations |
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[23] | 469 | * required to build the new process descriptor and the associated thread. |
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| 470 | * Finally, the calling process and thread are deleted. |
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[407] | 471 | ****************************************************************************************** |
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| 472 | * @ filename : string pointer on .elf filename (pointer in user space) |
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| 473 | * @ argv : array of strings on process arguments (pointers in user space) |
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| 474 | * @ envp : array of strings on environment variables (pointers in user space) |
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[23] | 475 | * @ returns O if success / returns -1 if failure. |
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[407] | 476 | *****************************************************************************************/ |
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[1] | 477 | int sys_exec( char * filename, |
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| 478 | char ** argv, |
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| 479 | char ** envp ); |
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| 480 | |
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[407] | 481 | /****************************************************************************************** |
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| 482 | * [38] This function returns in the <stat> structure, defined in the "shared_syscalls.h" |
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| 483 | * file, various informations on the file/directory identified by the <pathname> argument. |
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| 484 | ****************************************************************************************** |
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| 485 | * @ pathname : user pointer on file pathname. |
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| 486 | * @ stat : user pointer on the stat structure. |
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[23] | 487 | * @ returns O if success / returns -1 if failure. |
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[407] | 488 | *****************************************************************************************/ |
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| 489 | int sys_stat( const char * pathname, |
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| 490 | struct stat * stat ); |
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[1] | 491 | |
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[407] | 492 | /****************************************************************************************** |
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| 493 | * [39] This non-standard function is used to activate / desactivate the trace for a thread |
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[23] | 494 | * identified by the <trdid> and <pid> arguments. |
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[407] | 495 | * It can be called by any other thread in the same process. |
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| 496 | ****************************************************************************************** |
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[23] | 497 | * @ operation : operation type as defined below. |
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| 498 | * @ pid : process identifier. |
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| 499 | * @ trdid : thread identifier. |
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| 500 | * @ returns O if success / returns -1 if failure. |
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[407] | 501 | *****************************************************************************************/ |
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[23] | 502 | int sys_trace( uint32_t operation, |
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| 503 | pid_t pid, |
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| 504 | uint32_t trdid ); |
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[1] | 505 | |
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[407] | 506 | /****************************************************************************************** |
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| 507 | * [40] This function returns the hardware platform parameters. |
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| 508 | ****************************************************************************************** |
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| 509 | * @ x_size : [out] number of clusters in a row. |
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| 510 | * @ y_size : [out] number of clusters in a column. |
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| 511 | * @ ncores : [out] number of cores per cluster. |
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| 512 | * @ return 0 if success / return -1 if illegal arguments |
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| 513 | *****************************************************************************************/ |
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| 514 | int sys_get_config( uint32_t * x_size, |
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| 515 | uint32_t * y_size, |
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| 516 | uint32_t * ncores ); |
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[1] | 517 | |
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[407] | 518 | /****************************************************************************************** |
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| 519 | * [41] This function returns the calling core cluster and local index. |
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| 520 | ****************************************************************************************** |
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| 521 | * @ cxy : [out] cluster identifier (fixed format) |
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| 522 | * @ lid : [out] core local index in cluster. |
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| 523 | * @ return 0 if success / return -1 if illegal arguments |
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| 524 | *****************************************************************************************/ |
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| 525 | int sys_get_core( uint32_t * cxy, |
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| 526 | uint32_t * lid ); |
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[1] | 527 | |
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[407] | 528 | /****************************************************************************************** |
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| 529 | * [42] This function returns in a 64 bits user buffer the calling core cycles count. |
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| 530 | * It uses both the hardware register and the core descriptor cycles count to take |
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| 531 | * into account a possible harware register overflow in 32 bits architectures. |
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| 532 | ****************************************************************************************** |
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| 533 | * cycle : [out] address of buffer in user space. |
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| 534 | * @ return 0 if success / return -1 if illegal arguments |
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| 535 | *****************************************************************************************/ |
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| 536 | int sys_get_cycle( uint64_t * cycle ); |
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| 537 | |
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| 538 | /****************************************************************************************** |
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| 539 | * [43] This debug function displays on the kernel terminal the current state of a |
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| 540 | * scheduler identified by the <cxy> and <lid> arguments. |
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| 541 | ****************************************************************************************** |
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| 542 | * cxy : [in] target cluster identifier. |
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| 543 | * lid : [in] target core local index. |
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| 544 | * @ return 0 if success / return -1 if illegal arguments |
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| 545 | *****************************************************************************************/ |
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| 546 | int sys_get_sched( uint32_t cxy, |
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| 547 | uint32_t lid ); |
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| 548 | |
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| 549 | /****************************************************************************************** |
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| 550 | * [44] This debug function requires the kernel to display on the kernel terminal a message |
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| 551 | * containing the thread / process / core identifiers, and the cause of panic, |
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| 552 | * as defined by the <string> argument. |
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| 553 | ****************************************************************************************** |
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| 554 | * string : [in] message to be displayed. |
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| 555 | * @ return always 0. |
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| 556 | *****************************************************************************************/ |
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| 557 | int sys_panic( char * string ); |
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| 558 | |
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| 559 | /****************************************************************************************** |
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| 560 | * [45] This function block the calling thread on the THREAD_BLOCKED_GLOBAL condition, |
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| 561 | * and deschedule. |
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| 562 | ****************************************************************************************** |
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| 563 | * @ return 0 if success / returns -1 if failure. |
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| 564 | *****************************************************************************************/ |
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| 565 | int sys_thread_sleep(); |
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| 566 | |
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| 567 | /****************************************************************************************** |
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| 568 | * [46] This function unblock the thread identified by its <trdid> from the |
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| 569 | * THREAD_BLOCKED_GLOBAL condition. |
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| 570 | ****************************************************************************************** |
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| 571 | * @ trdid : target thread identifier. |
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| 572 | * @ return 0 if success / return -1 if failure. |
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| 573 | *****************************************************************************************/ |
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| 574 | int sys_thread_wakeup(); |
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| 575 | |
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| 576 | |
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[16] | 577 | #endif // _SYSCALLS_H_ |
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