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| Rev | Author | Line No. | Line |
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| 1174 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1264 | jermar | 29 | /** |
| 30 | * @file cap.c |
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| 31 | * @brief Capabilities control. |
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| 32 | * |
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| 33 | * @see cap.h |
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| 34 | */ |
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| 35 | |||
| 1174 | jermar | 36 | #include <security/cap.h> |
| 37 | #include <proc/task.h> |
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| 38 | #include <synch/spinlock.h> |
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| 39 | #include <arch.h> |
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| 40 | #include <typedefs.h> |
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| 41 | |||
| 42 | /** Set capabilities. |
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| 43 | * |
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| 44 | * @param t Task whose capabilities are to be changed. |
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| 45 | * @param caps New set of capabilities. |
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| 46 | */ |
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| 47 | void cap_set(task_t *t, cap_t caps) |
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| 48 | { |
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| 49 | ipl_t ipl; |
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| 50 | |||
| 51 | ipl = interrupts_disable(); |
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| 52 | spinlock_lock(&t->lock); |
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| 53 | |||
| 54 | t->capabilities = caps; |
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| 55 | |||
| 56 | spinlock_unlock(&t->lock); |
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| 57 | interrupts_restore(ipl); |
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| 58 | } |
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| 59 | |||
| 60 | /** Get capabilities. |
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| 61 | * |
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| 62 | * @param t Task whose capabilities are to be returned. |
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| 63 | * @return Task's capabilities. |
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| 64 | */ |
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| 65 | cap_t cap_get(task_t *t) |
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| 66 | { |
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| 67 | ipl_t ipl; |
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| 68 | cap_t caps; |
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| 69 | |||
| 70 | ipl = interrupts_disable(); |
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| 71 | spinlock_lock(&t->lock); |
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| 72 | |||
| 73 | caps = t->capabilities; |
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| 74 | |||
| 75 | spinlock_unlock(&t->lock); |
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| 76 | interrupts_restore(ipl); |
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| 77 | |||
| 78 | return caps; |
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| 79 | } |