source: trunk/kernel/syscalls/sys_exit.c @ 416

Last change on this file since 416 was 416, checked in by alain, 4 years ago

Improve sys_exec.

File size: 2.3 KB
Line 
1/*
2 * sys_exit.c - Kernel function implementing the "exit" system call.
3 *
4 * Author    Alain Greiner (2016,2017)
5 *
6 * Copyright (c)  UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <kernel_config.h>
25#include <hal_types.h>
26#include <hal_irqmask.h>
27#include <errno.h>
28#include <thread.h>
29#include <printk.h>
30#include <process.h>
31#include <signal.h>
32#include <cluster.h>
33#include <rpc.h>
34
35///////////////////////////////
36int sys_exit( uint32_t status )
37{
38    uint32_t    save_sr;       // required to enable IRQs
39
40    thread_t  * this = CURRENT_THREAD;
41    pid_t       pid  = this->process->pid;
42
43#if CONFIG_SYSCALL_DEBUG
44uint64_t    tm_start;
45uint64_t    tm_end;
46tm_start = hal_get_cycles();
47printk("\n[DBG] %s : core[%x,%d] enter / process %x / status %x / cycle %d\n",
48__FUNCTION__ , local_cxy , this->core->lid , pid , status , (uint32_t)tm_start );
49#endif
50
51    // get owner process cluster
52    cxy_t   owner_cxy  = CXY_FROM_PID( pid );
53
54    // enable IRQs
55    hal_enable_irq( &save_sr );
56
57    // execute process_make_exit() function in owner cluster
58    if( local_cxy == owner_cxy )                                // owner is local
59    {
60        process_make_exit( pid , status );
61    }
62    else                                                        // owner is remote
63    {
64        rpc_process_make_exit_client( owner_cxy, pid , status );
65    }
66
67    // restore IRQs
68    hal_restore_irq( save_sr );
69
70    hal_fence();
71
72#if CONFIG_SYSCALL_DEBUG
73tm_end = hal_get_cycles();
74printk("\n[DBG] %s : core[%x,%d] exit / process %x / status %x / cost = %d\n",
75__FUNCTION__ , local_cxy , this->core->lid , pid , status , (uint32_t)(tm_end - tm_start) );
76#endif
77
78        return 0;
79
80}  // end sys_exit()
81
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