| 1 | /*
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| 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 |
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| 29 | /** @addtogroup libc
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file cap.c
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| 34 | * @brief Functions to grant/revoke capabilities to/from a task.
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| 35 | */
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| 36 |
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| 37 | #include <cap.h>
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| 38 | #include <task.h>
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| 39 | #include <libc.h>
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| 40 |
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| 41 | /** Grant capabilities to a task.
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| 42 | *
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| 43 | * @param id Destination task ID.
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| 44 | * @param caps Capabilities to grant.
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| 45 | *
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| 46 | * @return Zero on success or a value from @ref errno.h on failure.
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| 47 | *
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| 48 | */
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| 49 | int cap_grant(task_id_t id, unsigned int caps)
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| 50 | {
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| 51 | #ifdef __32_BITS__
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| 52 | sysarg64_t arg = (sysarg64_t) id;
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| 53 | return __SYSCALL2(SYS_CAP_GRANT, (sysarg_t) &arg, (sysarg_t) caps);
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| 54 | #endif
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| 55 |
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| 56 | #ifdef __64_BITS__
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| 57 | return __SYSCALL2(SYS_CAP_GRANT, (sysarg_t) id, (sysarg_t) caps);
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| 58 | #endif
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| 59 | }
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| 60 |
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| 61 | /** Revoke capabilities from a task.
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| 62 | *
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| 63 | * @param id Destination task ID.
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| 64 | * @param caps Capabilities to revoke.
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| 65 | *
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| 66 | * @return Zero on success or a value from @ref errno.h on failure.
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| 67 | *
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| 68 | */
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| 69 | int cap_revoke(task_id_t id, unsigned int caps)
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| 70 | {
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| 71 | #ifdef __32_BITS__
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| 72 | sysarg64_t arg = (sysarg64_t) id;
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| 73 | return __SYSCALL2(SYS_CAP_REVOKE, (sysarg_t) &arg, (sysarg_t) caps);
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| 74 | #endif
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| 75 |
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| 76 | #ifdef __64_BITS__
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| 77 | return __SYSCALL2(SYS_CAP_REVOKE, (sysarg_t) id, (sysarg_t) caps);
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| 78 | #endif
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| 79 | }
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| 80 |
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| 81 | /** @}
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| 82 | */
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