[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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[421] | 80 | * The target thread must be joinable (running in ATTACHED mode), and must be different |
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| 81 | * from the calling thread. |
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[23] | 82 | * If the <exit_value> argument is not NULL, the value passed to pthread_exit() by the |
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| 83 | * target thread is stored in the location referenced by exit_value. |
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[407] | 84 | ****************************************************************************************** |
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[23] | 85 | * @ trdid : [in] target thread identifier. |
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| 86 | * @ thread : [out] buffer for exit_value returned by target thread. |
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| 87 | * @ return 0 if success / return -1 if failure. |
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[407] | 88 | *****************************************************************************************/ |
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[23] | 89 | int sys_thread_join( trdid_t trdid, |
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| 90 | void ** exit_value ); |
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[16] | 91 | |
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[407] | 92 | /****************************************************************************************** |
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[23] | 93 | * [4] This function detach a joinable thread. |
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[407] | 94 | ****************************************************************************************** |
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[409] | 95 | * @ trdid : thread identifier. |
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[23] | 96 | * @ return 0 if success / return -1 if failure. |
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[407] | 97 | *****************************************************************************************/ |
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[23] | 98 | int sys_thread_detach( trdid_t trdid ); |
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[16] | 99 | |
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[407] | 100 | /****************************************************************************************** |
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[409] | 101 | * [5] This function requests a target thread identified by its <trdid> argument |
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| 102 | * to be cancelled. Depending on killer thread and target thread location, it calls |
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| 103 | * the thread_kil() function or the rpc_thread_kill_client() function to do the work. |
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| 104 | * It actually set the THREAD_SIG_KILL signal, set the THREAD_BLOCKED_GLOBAL bit in the |
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| 105 | * target thread descriptor and return. |
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| 106 | * The thread will be detached from its process, and the memory allocated to the thread |
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| 107 | * descriptor will be released later by the scheduler. |
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| 108 | ****************************************************************************************** |
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| 109 | * @ trdid : thread identifier. |
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| 110 | * @ return 0 if success / return -1 if illegal argument. |
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[407] | 111 | *****************************************************************************************/ |
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[409] | 112 | int sys_thread_cancel( trdid_t trdid ); |
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[16] | 113 | |
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[407] | 114 | /****************************************************************************************** |
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[23] | 115 | * [6] This function implement all operations on a POSIX unnamed semaphore, |
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| 116 | * that can be shared by threads running in different clusters. |
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| 117 | * The kernel structure representing a remote semaphore is in the remote_sem.h file, |
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| 118 | * and the code implementing the operations is in the remore_sem.c file. |
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[407] | 119 | ****************************************************************************************** |
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[23] | 120 | * @ vaddr : semaphore virtual address in user space == identifier. |
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| 121 | * @ operation : SEM_INIT / SEM_DESTROY / SEM_GETVALUE / SEM_POST / SEM_WAIT. |
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| 122 | * @ value : pointer on in/out argument in user space. |
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| 123 | * @ return 0 if success / return -1 if failure. |
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[407] | 124 | *****************************************************************************************/ |
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[23] | 125 | int sys_sem( void * vaddr, |
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| 126 | uint32_t operation, |
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| 127 | uint32_t * value ); |
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[16] | 128 | |
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[407] | 129 | /****************************************************************************************** |
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[23] | 130 | * [7] This function implement all operations on a POSIX condition variable. |
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| 131 | * The kernel structure representing a cond_var is defined in the remote_cv.h file, |
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| 132 | * The code implementing the operations is defined in the remote_cv.c file. |
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[407] | 133 | ****************************************************************************************** |
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[23] | 134 | * @ vaddr : condvar virtual address in user space == identifier. |
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| 135 | * @ operation : operation type (see below). |
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| 136 | * @ attr : mutex virtual address in user space == identifier. |
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| 137 | * @ return 0 if success / return -1 if failure. |
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[407] | 138 | *****************************************************************************************/ |
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[23] | 139 | int sys_condvar( void * condvar, |
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| 140 | uint32_t operation, |
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| 141 | void * mutex ); |
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[16] | 142 | |
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[407] | 143 | /****************************************************************************************** |
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[23] | 144 | * [8] This function implement all operations on a POSIX barrier. |
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| 145 | * The kernel structure representing a barrier is defined in the remote_barrier.h file. |
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| 146 | * The code implementting the operations is defined in the remote_barrier.c file. |
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[407] | 147 | ****************************************************************************************** |
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[23] | 148 | * @ vaddr : barrier virtual address in user space == identifier. |
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| 149 | * @ operation : BARRIER_INIT / BARRIER_DESTROY / BARRIER_WAIT. |
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| 150 | * @ count : number of expected threads (only used by BARRIER_INIT operation). |
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| 151 | * @ return 0 if success / return -1 if failure. |
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[407] | 152 | *****************************************************************************************/ |
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[23] | 153 | int sys_barrier( void * vaddr, |
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| 154 | uint32_t operation, |
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| 155 | uint32_t count ); |
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[16] | 156 | |
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[407] | 157 | /****************************************************************************************** |
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[23] | 158 | * [9] This function implement all operations on a POSIX mutex. |
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| 159 | * The kernel structure representing a barrier is defined in the remote_barrier.h file. |
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| 160 | * The code implementting the operations is defined in the remote_barrier.c file. |
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[407] | 161 | ****************************************************************************************** |
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[23] | 162 | * @ vaddr : mutex virtual address in user space == identifier. |
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| 163 | * @ operation : MUTEX_INIT / MUTEX_DESTROY / MUTEX_LOCK / MUTEX_UNLOCK |
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| 164 | * @ attr : mutex attributes (non supported yet => must be 0). |
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| 165 | * @ return 0 if success / return -1 if failure. |
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[407] | 166 | *****************************************************************************************/ |
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[23] | 167 | int sys_mutex( void * vaddr, |
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| 168 | uint32_t operation, |
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| 169 | uint32_t count ); |
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[16] | 170 | |
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[407] | 171 | /****************************************************************************************** |
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[408] | 172 | * [10] This function implement the exit system call terminating a POSIX process. |
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[433] | 173 | * In the present implementation, this function implements actually the _exit(): |
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| 174 | * - it does not flush open ourput steams. |
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| 175 | * - it does not close open streams. |
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[407] | 176 | ****************************************************************************************** |
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[408] | 177 | * @ status : terminaison status (not used in present implementation). |
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[407] | 178 | *****************************************************************************************/ |
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[409] | 179 | int sys_exit( uint32_t status ); |
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[16] | 180 | |
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[407] | 181 | /****************************************************************************************** |
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[408] | 182 | * [11] This function remove an existing mapping defined by the <addr> and <size> |
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[407] | 183 | * arguments in user space. |
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| 184 | ****************************************************************************************** |
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| 185 | * @ addr : base address in user space. |
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| 186 | * # size : number of bytes. |
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[23] | 187 | * @ return 0 if success / return -1 if failure. |
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[407] | 188 | *****************************************************************************************/ |
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| 189 | int sys_munmap( void * addr, |
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| 190 | uint32_t size ); |
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[16] | 191 | |
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[407] | 192 | /****************************************************************************************** |
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| 193 | * [12] This function open or create an open file descriptor. |
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| 194 | ****************************************************************************************** |
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[23] | 195 | * @ pathname : pathname (can be relative or absolute). |
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| 196 | * @ flags : bit vector attributes (see below). |
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| 197 | * @ mode : access rights. |
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| 198 | * @ return file descriptor index in fd_array if success / return -1 if failure. |
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[407] | 199 | *****************************************************************************************/ |
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[23] | 200 | int sys_open( char * pathname, |
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| 201 | uint32_t flags, |
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| 202 | uint32_t mode ); |
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[16] | 203 | |
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[407] | 204 | /****************************************************************************************** |
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| 205 | * [13] This function map physical memory (or a file) in the calling thread virtual space. |
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| 206 | * The <attr> argument is a pointer on a structure for arguments (see shared_syscalls.h). |
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| 207 | ****************************************************************************************** |
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| 208 | * @ attr : pointer on attributes structure. |
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| 209 | * @ return 0 if success / return -1 if failure. |
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| 210 | *****************************************************************************************/ |
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| 211 | int sys_mmap( mmap_attr_t * attr ); |
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[23] | 212 | |
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[407] | 213 | /****************************************************************************************** |
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[23] | 214 | * [14] This function read bytes from an open file identified by its file descriptor. |
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[407] | 215 | * The file can be a regular file or character oriented device. |
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[408] | 216 | * IRQs are enabled during this system call. |
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[407] | 217 | ****************************************************************************************** |
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[23] | 218 | * @ file_id : open file index in fd_array. |
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| 219 | * @ buf : buffer virtual address in user space. |
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| 220 | * @ count : number of bytes. |
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| 221 | * @ return number of bytes actually read if success / returns -1 if failure. |
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[407] | 222 | *****************************************************************************************/ |
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[23] | 223 | int sys_read( uint32_t file_id, |
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| 224 | void * buf, |
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| 225 | uint32_t count ); |
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[16] | 226 | |
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[407] | 227 | /****************************************************************************************** |
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[23] | 228 | * [15] This function writes bytes to an open file identified by its file descriptor. |
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[407] | 229 | * The file can be a regular file or character oriented device. |
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[408] | 230 | * IRQs are enabled during this system call. |
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[407] | 231 | ****************************************************************************************** |
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[23] | 232 | * @ file_id : open file index in fd_array. |
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| 233 | * @ buf : buffer virtual address in user space. |
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| 234 | * @ count : number of bytes. |
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| 235 | * @ return number of bytes actually written if success / returns -1 if failure. |
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[407] | 236 | *****************************************************************************************/ |
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[23] | 237 | int sys_write( uint32_t file_id, |
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| 238 | void * buf, |
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| 239 | uint32_t count ); |
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[16] | 240 | |
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[407] | 241 | /****************************************************************************************** |
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| 242 | * [16] This function repositions the offset of the file descriptor identified by <file_id>, |
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| 243 | * according to the operation type defined by the <whence> argument. |
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| 244 | ****************************************************************************************** |
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[23] | 245 | * @ file_id : open file index in fd_array. |
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[407] | 246 | * @ offset : used to compute new offset value. |
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[23] | 247 | * @ whence : operation type (see below). |
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| 248 | * @ return 0 if success / returns -1 if failure. |
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[407] | 249 | *****************************************************************************************/ |
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[23] | 250 | int sys_lseek( xptr_t file_id, |
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| 251 | uint32_t offset, |
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| 252 | uint32_t whence ); |
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[16] | 253 | |
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[407] | 254 | /****************************************************************************************** |
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[23] | 255 | * [17] This function release the memory allocated for the file descriptor identified by |
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| 256 | * the <file_id> argument, and remove the fd array_entry in all copies of the process |
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| 257 | * descriptor. |
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[407] | 258 | ****************************************************************************************** |
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[23] | 259 | file_id : file descriptor index in fd_array. |
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| 260 | * @ return 0 if success / returns -1 if failure. |
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[407] | 261 | *****************************************************************************************/ |
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[23] | 262 | int sys_close( uint32_t file_id ); |
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[16] | 263 | |
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[407] | 264 | /****************************************************************************************** |
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| 265 | * [18] This function removes a directory entry identified by the <pathname> from the |
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[23] | 266 | * directory, and decrement the link count of the file referenced by the link. |
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| 267 | * If the link count reduces to zero, and no process has the file open, then all resources |
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| 268 | * associated with the file are reclaimed. If one or more process have the file open when |
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| 269 | * the last link is removed, the link is removed, but the removal of the file is delayed |
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| 270 | * until all references to it have been closed. |
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[407] | 271 | ****************************************************************************************** |
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[23] | 272 | * @ pathname : pathname (can be relative or absolute). |
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| 273 | * @ return 0 if success / returns -1 if failure. |
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[407] | 274 | *****************************************************************************************/ |
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[23] | 275 | int sys_unlink( char * pathname ); |
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[16] | 276 | |
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[407] | 277 | /****************************************************************************************** |
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[23] | 278 | * [19] This function creates in the calling thread cluster an unnamed pipe, and two |
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| 279 | * (read and write) file descriptors. |
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[407] | 280 | * TODO not implemented yet... |
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| 281 | ****************************************************************************************** |
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[23] | 282 | * @ file_id[0] : [out] read only file descriptor index. |
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| 283 | * @ file_id[1] : [out] write only file descriptor index. |
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| 284 | * @ return 0 if success / return -1 if failure. |
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[407] | 285 | *****************************************************************************************/ |
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[23] | 286 | int sys_pipe( uint32_t file_id[2] ); |
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[16] | 287 | |
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[407] | 288 | /****************************************************************************************** |
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[23] | 289 | * [20] This function change the current working directory in reference process descriptor. |
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[407] | 290 | ****************************************************************************************** |
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[23] | 291 | * @ pathname : pathname (can be relative or absolute). |
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| 292 | * @ return 0 if success / returns -1 if failure. |
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[407] | 293 | *****************************************************************************************/ |
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[23] | 294 | int sys_chdir( char * pathname ); |
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[16] | 295 | |
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[407] | 296 | /****************************************************************************************** |
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[23] | 297 | * [21] This function creates a new directory in file system. |
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[407] | 298 | ****************************************************************************************** |
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[23] | 299 | * @ pathname : pathname (can be relative or absolute). |
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| 300 | * @ mode : access rights (as defined in chmod). |
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| 301 | * @ return 0 if success / returns -1 if failure. |
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[407] | 302 | *****************************************************************************************/ |
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[279] | 303 | int sys_mkdir( char * pathname, |
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[23] | 304 | uint32_t mode ); |
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[16] | 305 | |
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[407] | 306 | /****************************************************************************************** |
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[23] | 307 | * [22] This function creates a named FIFO file in the calling thread cluster. |
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| 308 | * The associated read and write file descriptors mut be be explicitely created |
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[407] | 309 | * using the sys_open() function. |
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| 310 | ****************************************************************************************** |
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[23] | 311 | * @ pathname : pathname (can be relative or absolute). |
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| 312 | * @ mode : access rights (as defined in chmod). |
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| 313 | * @ return 0 if success / returns -1 if failure. |
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[407] | 314 | *****************************************************************************************/ |
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[23] | 315 | int sys_mkfifo( char * pathname, |
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| 316 | uint32_t mode ); |
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[16] | 317 | |
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[407] | 318 | /****************************************************************************************** |
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| 319 | * [23] This function open a directory, that must exist in the file system, returning |
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| 320 | * a DIR pointer on the directory in user space. |
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| 321 | ****************************************************************************************** |
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[23] | 322 | * @ pathname : pathname (can be relative or absolute). |
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[407] | 323 | * @ dirp : [out] buffer for pointer on user directory (DIR). |
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[23] | 324 | * @ return 0 if success / returns -1 if failure. |
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[407] | 325 | *****************************************************************************************/ |
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| 326 | int sys_opendir( char * pathname, |
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| 327 | DIR ** dirp ); |
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[16] | 328 | |
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[407] | 329 | /****************************************************************************************** |
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| 330 | * [24] This function returns an user pointer on the dirent structure describing the |
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| 331 | * next directory entry in the directory identified by the <dirp> argument. |
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| 332 | ****************************************************************************************** |
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| 333 | * @ dirp : user pointer identifying the searched directory. |
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| 334 | * @ dentp : [out] buffer for pointer on user direntory entry (dirent). |
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| 335 | * @ return O if success / returns -1 if failure. |
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| 336 | *****************************************************************************************/ |
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| 337 | int sys_readdir( DIR * dirp, |
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| 338 | struct dirent ** dentp ); |
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| 339 | |
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| 340 | /****************************************************************************************** |
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| 341 | * [25] This function closes the directory identified by the <dirp> argument, and releases |
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| 342 | * all structures associated with the <dirp> pointer. |
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| 343 | ****************************************************************************************** |
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| 344 | * @ dirp : user pointer identifying the directory. |
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[23] | 345 | * @ return 0 if success / returns -1 if failure. |
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[407] | 346 | *****************************************************************************************/ |
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| 347 | int sys_closedir( DIR * dirp ); |
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[16] | 348 | |
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[407] | 349 | /****************************************************************************************** |
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[23] | 350 | * [26] This function returns the pathname of the current working directory. |
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[407] | 351 | ****************************************************************************************** |
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[23] | 352 | * buf : buffer addres in user space. |
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| 353 | * nbytes : user buffer size in bytes. |
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| 354 | * @ return 0 if success / returns -1 if failure. |
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[407] | 355 | *****************************************************************************************/ |
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[23] | 356 | int sys_getcwd( char * buf, |
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| 357 | uint32_t nbytes ); |
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[16] | 358 | |
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[407] | 359 | /****************************************************************************************** |
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| 360 | * [27] This slot is not used. |
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| 361 | *****************************************************************************************/ |
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[16] | 362 | |
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[407] | 363 | /****************************************************************************************** |
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[23] | 364 | * [28] This function forces the calling thread to sleep, for a fixed number of cycles. |
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[407] | 365 | ****************************************************************************************** |
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[23] | 366 | * cycles : number of cycles. |
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[407] | 367 | *****************************************************************************************/ |
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[23] | 368 | int sys_alarm( uint32_t cycles ); |
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[16] | 369 | |
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[407] | 370 | /****************************************************************************************** |
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| 371 | * [29] This function removes a directory file whose name is given by <pathname>. |
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| 372 | * The directory must not have any entries other than `.' and `..'. |
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| 373 | ****************************************************************************************** |
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[23] | 374 | * @ pathname : pathname (can be relative or absolute). |
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| 375 | * @ return 0 if success / returns -1 if failure. |
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[407] | 376 | *****************************************************************************************/ |
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[23] | 377 | int sys_rmdir( char * pathname ); |
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[16] | 378 | |
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[407] | 379 | /****************************************************************************************** |
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[23] | 380 | * [30] This function implement the operations related to User Thread Local Storage. |
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| 381 | * It is actually implemented as an uint32_t variable in the thread descriptor. |
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[407] | 382 | ****************************************************************************************** |
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[23] | 383 | * @ operation : UTLS operation type as defined below. |
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| 384 | * @ value : argument value for the UTLS_SET operation. |
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| 385 | * @ return value for the UTLS_GET and UTLS_GET_ERRNO / return -1 if failure. |
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[407] | 386 | *****************************************************************************************/ |
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[23] | 387 | int sys_utls( uint32_t operation, |
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| 388 | uint32_t value ); |
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[16] | 389 | |
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[407] | 390 | /****************************************************************************************** |
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[23] | 391 | * [31] This function change the acces rights for the file/dir identified by the |
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| 392 | * pathname argument. |
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[407] | 393 | ****************************************************************************************** |
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[23] | 394 | * @ pathname : pathname (can be relative or absolute). |
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| 395 | * @ rights : acces rights. |
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| 396 | * @ return 0 if success / returns -1 if failure. |
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[407] | 397 | *****************************************************************************************/ |
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[23] | 398 | int sys_chmod( char * pathname, |
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| 399 | uint32_t rights ); |
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[16] | 400 | |
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[407] | 401 | /****************************************************************************************** |
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[23] | 402 | * [32] This function associate a specific signal handler to a given signal type. |
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| 403 | * Tee handlers for the SIGKILL and SIGSTOP signals cannot be redefined. |
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[407] | 404 | ****************************************************************************************** |
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[23] | 405 | * @ sig_id : index defining signal type (from 1 to 31). |
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| 406 | * @ handler : pointer on fonction implementing the specific handler. |
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| 407 | * @ return 0 if success / returns -1 if failure. |
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[407] | 408 | *****************************************************************************************/ |
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[23] | 409 | int sys_signal( uint32_t sig_id, |
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| 410 | void * handler ); |
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[16] | 411 | |
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[407] | 412 | /****************************************************************************************** |
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[23] | 413 | * [33] This function returns in the structure <tv>, defined in the time.h file, |
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| 414 | * the current time (in seconds & micro-seconds). |
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| 415 | * It is computed from the calling core descriptor. |
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| 416 | * The timezone is not supported. |
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[407] | 417 | ****************************************************************************************** |
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[23] | 418 | * @ tv : pointer on the timeval structure. |
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| 419 | * @ tz : pointer on the timezone structure : must be NULL. |
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| 420 | * @ return 0 if success / returns -1 if failure. |
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[407] | 421 | *****************************************************************************************/ |
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[50] | 422 | int sys_timeofday( struct timeval * tv, |
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| 423 | struct timezone * tz ); |
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[16] | 424 | |
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[407] | 425 | /****************************************************************************************** |
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[433] | 426 | * [34] This function implements the "kill" system call on the kernel side. |
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[23] | 427 | * It register the signal defined by the <sig_id> argument in all thread descriptors |
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| 428 | * of a target process identified by the <pid> argument. This is done in all clusters |
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| 429 | * containing threads for the target process. |
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| 430 | * It can be executed by any thread running in any cluster, as this function uses |
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[407] | 431 | * remote access to traverse the list of process copies stored in the owner cluster, |
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[23] | 432 | * and the RPC_SIGNAL_RISE to signal the remote threads. |
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[421] | 433 | * This function does nothing for (sig_id == 0). This can be used to check process pid. |
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| 434 | * TODO : This first implementation supports only SIGKILL / SIGSTOP / SIGCONT values. |
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[407] | 435 | ****************************************************************************************** |
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[16] | 436 | * @ pid : target process identifier. |
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[433] | 437 | * @ sig_id : index defining the signal type. |
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[23] | 438 | * @ return 0 if success / returns -1 if failure. |
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[407] | 439 | *****************************************************************************************/ |
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[16] | 440 | int sys_kill( pid_t pid, |
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[23] | 441 | uint32_t sig_id ); |
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[16] | 442 | |
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[407] | 443 | /****************************************************************************************** |
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[433] | 444 | * [35] This function implements the "getpid" system call on the kernel side. |
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[407] | 445 | ****************************************************************************************** |
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| 446 | * @ returns the process PID for the calling thread. |
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| 447 | *****************************************************************************************/ |
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[1] | 448 | int sys_getpid(); |
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| 449 | |
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[407] | 450 | /****************************************************************************************** |
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[433] | 451 | * [36] This function implement the "fork" system call on the kernel side. |
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| 452 | * The calling process descriptor (parent process), and the associated thread descriptor |
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| 453 | * are replicated in a - likely - remote cluster, that becomes the child process owner. |
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| 454 | * The child process get a new PID, and is linked to the parent PID. The child process |
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| 455 | * inherit from its parent the memory image, and all open files (including the TXT). |
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| 456 | * The child process becomes the TXT terminal owner. |
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[1] | 457 | * The target cluster depends on the "fork_user" flag and "fork_cxy" variable that can be |
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| 458 | * stored in the calling thread descriptor by the specific fork_place() system call. |
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[433] | 459 | * If not, the kernel function makes a query to the DQDT to select the target cluster. |
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[407] | 460 | ****************************************************************************************** |
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| 461 | * @ if success, returns child process PID to parent, and return O to child. |
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| 462 | * @ if failure, returns -1 to parent / no child process is created. |
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| 463 | *****************************************************************************************/ |
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[1] | 464 | int sys_fork(); |
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| 465 | |
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[407] | 466 | /****************************************************************************************** |
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[433] | 467 | * [37] This function implement the "exec" system call on the kernel side. |
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| 468 | * It creates, in the same cluster as the calling thread, a new process descriptor, |
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| 469 | * and a new associated main thread descriptor, executing a new memory image defined |
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| 470 | * by the <filename> argument. This new process inherit from the old process the PID |
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| 471 | * and the PPID, as well as all open files (including the TXT). |
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| 472 | * The old process descriptor, and all its threads are blocked, and marked for deletion. |
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| 473 | * Therefore the exec syscall does not return to the calling thread in case of success. |
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| 474 | * This function build an exec_info_t structure containing the new process arguments, |
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| 475 | * as defined by the <arv> argument, and the new process environment variables, |
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| 476 | * as defined by the <envp> argument. |
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| 477 | * TODO : the <argv> and <envp> arguments are not supported yet (both must be NULL). |
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[407] | 478 | ****************************************************************************************** |
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| 479 | * @ filename : string pointer on .elf filename (pointer in user space) |
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| 480 | * @ argv : array of strings on process arguments (pointers in user space) |
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| 481 | * @ envp : array of strings on environment variables (pointers in user space) |
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[433] | 482 | * @ does not return if success / returns -1 if failure. |
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[407] | 483 | *****************************************************************************************/ |
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[1] | 484 | int sys_exec( char * filename, |
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| 485 | char ** argv, |
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| 486 | char ** envp ); |
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| 487 | |
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[407] | 488 | /****************************************************************************************** |
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| 489 | * [38] This function returns in the <stat> structure, defined in the "shared_syscalls.h" |
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| 490 | * file, various informations on the file/directory identified by the <pathname> argument. |
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| 491 | ****************************************************************************************** |
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| 492 | * @ pathname : user pointer on file pathname. |
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| 493 | * @ stat : user pointer on the stat structure. |
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[23] | 494 | * @ returns O if success / returns -1 if failure. |
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[407] | 495 | *****************************************************************************************/ |
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| 496 | int sys_stat( const char * pathname, |
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| 497 | struct stat * stat ); |
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[1] | 498 | |
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[407] | 499 | /****************************************************************************************** |
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[433] | 500 | * [39] This blocking function waits a change of a child process state, that can be: |
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| 501 | * - a termination of child following a process_make_exit(). |
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| 502 | * - a termination of child following a process_make_kill(). |
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[421] | 503 | * - a blocking of child following a SIGSTOP signal. |
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[433] | 504 | * In case of a multi-thread process, this function must be called by the main thread |
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| 505 | * runningin the reference cluster. |
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| 506 | * When a change has been observed, it returns the PID of the child process, and stores |
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| 507 | * in the <status> argument relevant information on the child state change. |
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[421] | 508 | * The following macros can be used to extract information from status: |
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| 509 | * - WIFEXITED(status) : is true if the child process terminated with an exit(). |
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| 510 | * - WIFSIGNALED(status) : is true if the child process terminated by a signal. |
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| 511 | * - WIFSTOPPED(status) : is true if the child process is stopped by a signal. |
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| 512 | * - WEXITSTATUS(status) : returns the low-order 8 bits of the exit() argument. |
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| 513 | * If a parent process terminates without waiting for all child processes to terminate, |
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| 514 | * the remaining child processes are attached to the init process. |
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[433] | 515 | * WARNING: negative values for the <pid> argument are not supported. |
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[421] | 516 | ****************************************************************************************** |
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[433] | 517 | * @ searched_pid : searched child process identifier. |
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| 518 | * @ status : [out] child termination status. |
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| 519 | * @ return child PID if success / return -1 if searched PID not found. |
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[407] | 520 | *****************************************************************************************/ |
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[421] | 521 | int sys_wait( uint32_t * status ); |
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[1] | 522 | |
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[407] | 523 | /****************************************************************************************** |
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| 524 | * [40] This function returns the hardware platform parameters. |
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| 525 | ****************************************************************************************** |
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| 526 | * @ x_size : [out] number of clusters in a row. |
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| 527 | * @ y_size : [out] number of clusters in a column. |
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[421] | 528 | * @ y_width : [out] number of bits in Y field for CXY. |
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[407] | 529 | * @ ncores : [out] number of cores per cluster. |
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| 530 | * @ return 0 if success / return -1 if illegal arguments |
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| 531 | *****************************************************************************************/ |
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| 532 | int sys_get_config( uint32_t * x_size, |
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| 533 | uint32_t * y_size, |
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[421] | 534 | uint32_t * y_width, |
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[407] | 535 | uint32_t * ncores ); |
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[1] | 536 | |
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[407] | 537 | /****************************************************************************************** |
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| 538 | * [41] This function returns the calling core cluster and local index. |
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| 539 | ****************************************************************************************** |
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| 540 | * @ cxy : [out] cluster identifier (fixed format) |
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| 541 | * @ lid : [out] core local index in cluster. |
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| 542 | * @ return 0 if success / return -1 if illegal arguments |
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| 543 | *****************************************************************************************/ |
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| 544 | int sys_get_core( uint32_t * cxy, |
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| 545 | uint32_t * lid ); |
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[1] | 546 | |
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[407] | 547 | /****************************************************************************************** |
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| 548 | * [42] This function returns in a 64 bits user buffer the calling core cycles count. |
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| 549 | * It uses both the hardware register and the core descriptor cycles count to take |
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| 550 | * into account a possible harware register overflow in 32 bits architectures. |
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| 551 | ****************************************************************************************** |
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| 552 | * cycle : [out] address of buffer in user space. |
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| 553 | * @ return 0 if success / return -1 if illegal arguments |
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| 554 | *****************************************************************************************/ |
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| 555 | int sys_get_cycle( uint64_t * cycle ); |
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| 556 | |
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| 557 | /****************************************************************************************** |
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[421] | 558 | * [43] This debug function displays on the kernel terminal TXT0 an user defined string, |
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| 559 | * or the current state of a kernel structure, identified by the <type> argument. |
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| 560 | * The <arg0> and <arg1> arguments depends on the structure type. It can be: |
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| 561 | * - VMM : VSL and GPT for a process identified by <pid>. |
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| 562 | * - SCHED : all threads allocated to a scheduler identified by <cxy> & <lid>. |
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| 563 | * - PROCESS : all processes registered in a cluster identified by <cxy>. |
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| 564 | * - VFS : all files registered in the VFS cache. |
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| 565 | * - CHDEV : all registered channel devices. |
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[407] | 566 | ****************************************************************************************** |
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[421] | 567 | * type : [in] STRING / VMM / SCHED / PROCESS / VSEG / VFS |
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| 568 | * arg0 : [in] type dependant argument. |
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| 569 | * arg1 : [in] type dependant argument. |
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[407] | 570 | * @ return 0 if success / return -1 if illegal arguments |
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| 571 | *****************************************************************************************/ |
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[421] | 572 | int sys_display( reg_t type, |
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| 573 | reg_t arg0, |
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| 574 | reg_t arg1 ); |
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[407] | 575 | |
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| 576 | /****************************************************************************************** |
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| 577 | * [45] This function block the calling thread on the THREAD_BLOCKED_GLOBAL condition, |
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| 578 | * and deschedule. |
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| 579 | ****************************************************************************************** |
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| 580 | * @ return 0 if success / returns -1 if failure. |
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| 581 | *****************************************************************************************/ |
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| 582 | int sys_thread_sleep(); |
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| 583 | |
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| 584 | /****************************************************************************************** |
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| 585 | * [46] This function unblock the thread identified by its <trdid> from the |
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| 586 | * THREAD_BLOCKED_GLOBAL condition. |
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| 587 | ****************************************************************************************** |
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| 588 | * @ trdid : target thread identifier. |
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| 589 | * @ return 0 if success / return -1 if failure. |
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| 590 | *****************************************************************************************/ |
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| 591 | int sys_thread_wakeup(); |
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| 592 | |
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[421] | 593 | /****************************************************************************************** |
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| 594 | * [47] This non-standard function is used to activate / desactivate the trace for a thread |
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| 595 | * identified by the <trdid> and <pid> arguments. |
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| 596 | * It can be called by any other thread in the same process. |
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| 597 | ****************************************************************************************** |
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| 598 | * @ operation : operation type as defined below. |
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| 599 | * @ pid : process identifier. |
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| 600 | * @ trdid : thread identifier. |
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| 601 | * @ returns O if success / returns -1 if failure. |
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| 602 | *****************************************************************************************/ |
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| 603 | int sys_trace( uint32_t operation, |
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| 604 | pid_t pid, |
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| 605 | uint32_t trdid ); |
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[407] | 606 | |
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[421] | 607 | /****************************************************************************************** |
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| 608 | * [48] This function gives the process identified by the <pid> argument |
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| 609 | * the exclusive ownership of its TXT_TX terminal (put it in foreground). |
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| 610 | ****************************************************************************************** |
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| 611 | * @ pid : process identifier. |
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| 612 | * @ return 0 if success / return -1 if failure. |
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| 613 | *****************************************************************************************/ |
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| 614 | int sys_fg( pid_t pid ); |
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| 615 | |
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| 616 | |
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[16] | 617 | #endif // _SYSCALLS_H_ |
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