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| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
2 | * Copyright (C) 2006 Jakub Jermar |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
7 | * are met: |
| 8 | * |
8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
| 14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
| 16 | * |
16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| - | 29 | /** |
|
| - | 30 | * @file cap.c |
|
| - | 31 | * @brief Capabilities control. |
|
| - | 32 | * |
|
| - | 33 | * @see cap.h |
|
| - | 34 | */ |
|
| - | 35 | ||
| 29 | #include <security/cap.h> |
36 | #include <security/cap.h> |
| 30 | #include <proc/task.h> |
37 | #include <proc/task.h> |
| 31 | #include <synch/spinlock.h> |
38 | #include <synch/spinlock.h> |
| 32 | #include <arch.h> |
39 | #include <arch.h> |
| 33 | #include <typedefs.h> |
40 | #include <typedefs.h> |
| 34 | 41 | ||
| 35 | /** Set capabilities. |
42 | /** Set capabilities. |
| 36 | * |
43 | * |
| 37 | * @param t Task whose capabilities are to be changed. |
44 | * @param t Task whose capabilities are to be changed. |
| 38 | * @param caps New set of capabilities. |
45 | * @param caps New set of capabilities. |
| 39 | */ |
46 | */ |
| 40 | void cap_set(task_t *t, cap_t caps) |
47 | void cap_set(task_t *t, cap_t caps) |
| 41 | { |
48 | { |
| 42 | ipl_t ipl; |
49 | ipl_t ipl; |
| 43 | 50 | ||
| 44 | ipl = interrupts_disable(); |
51 | ipl = interrupts_disable(); |
| 45 | spinlock_lock(&t->lock); |
52 | spinlock_lock(&t->lock); |
| 46 | 53 | ||
| 47 | t->capabilities = caps; |
54 | t->capabilities = caps; |
| 48 | 55 | ||
| 49 | spinlock_unlock(&t->lock); |
56 | spinlock_unlock(&t->lock); |
| 50 | interrupts_restore(ipl); |
57 | interrupts_restore(ipl); |
| 51 | } |
58 | } |
| 52 | 59 | ||
| 53 | /** Get capabilities. |
60 | /** Get capabilities. |
| 54 | * |
61 | * |
| 55 | * @param t Task whose capabilities are to be returned. |
62 | * @param t Task whose capabilities are to be returned. |
| 56 | * @return Task's capabilities. |
63 | * @return Task's capabilities. |
| 57 | */ |
64 | */ |
| 58 | cap_t cap_get(task_t *t) |
65 | cap_t cap_get(task_t *t) |
| 59 | { |
66 | { |
| 60 | ipl_t ipl; |
67 | ipl_t ipl; |
| 61 | cap_t caps; |
68 | cap_t caps; |
| 62 | 69 | ||
| 63 | ipl = interrupts_disable(); |
70 | ipl = interrupts_disable(); |
| 64 | spinlock_lock(&t->lock); |
71 | spinlock_lock(&t->lock); |
| 65 | 72 | ||
| 66 | caps = t->capabilities; |
73 | caps = t->capabilities; |
| 67 | 74 | ||
| 68 | spinlock_unlock(&t->lock); |
75 | spinlock_unlock(&t->lock); |
| 69 | interrupts_restore(ipl); |
76 | interrupts_restore(ipl); |
| 70 | 77 | ||
| 71 | return caps; |
78 | return caps; |
| 72 | } |
79 | } |
| 73 | 80 | ||