source: trunk/kernel/syscalls/sys_get_core.c @ 459

Last change on this file since 459 was 457, checked in by alain, 3 years ago

This version modifies the exec syscall and fixes a large number of small bugs.
The version number has been updated (0.1)

File size: 2.2 KB
Line 
1/*
2 * sys_get_core.c - get calling core cluster and local index.
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 <hal_kernel_types.h>
25#include <hal_uspace.h>
26#include <hal_special.h>
27#include <errno.h>
28#include <core.h>
29#include <thread.h>
30#include <process.h>
31#include <vmm.h>
32#include <printk.h>
33
34
35/////////////////////////////////
36int sys_get_core( uint32_t * cxy,
37                  uint32_t * lid )
38{
39        error_t   error;
40    vseg_t  * vseg;
41    uint32_t  k_cxy;
42    uint32_t  k_lid;
43
44    thread_t  * this    = CURRENT_THREAD;
45    process_t * process = this->process;
46
47    // check cxy buffer in user space
48    error = vmm_get_vseg( process , (intptr_t)cxy , &vseg );
49
50        if( error )
51        {
52
53#if DEBUG_SYSCALLS_ERROR
54printk("\n[ERROR] in %s : cxy buffer unmapped %x / thread %x / process %x\n",
55__FUNCTION__ , (intptr_t)cxy , this->trdid , process->pid );
56vmm_display( process , false );
57#endif
58        this->errno = EFAULT;
59                return -1;
60        }
61
62    // check lid buffer in user space
63    error = vmm_get_vseg( process , (intptr_t)lid , &vseg );
64
65        if( error )
66        {
67
68#if DEBUG_SYSCALLS_ERROR
69printk("\n[ERROR] in %s : lid buffer unmapped %x / thread %x / process %x\n",
70__FUNCTION__ , (intptr_t)lid , this->trdid , process->pid );
71vmm_display( process , false );
72#endif
73        this->errno = EFAULT;
74                return -1;
75        }
76
77    // get parameters
78        k_cxy = local_cxy;
79        k_lid = this->core->lid;
80
81    // copy to user space
82        hal_copy_to_uspace( cxy , &k_cxy , sizeof(uint32_t) );
83        hal_copy_to_uspace( lid , &k_lid , sizeof(uint32_t) );
84
85        return 0; 
86
87}  // end sys_get_core()
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